ML14092A416

North Anna, Units 1 & 2, Response to March 12, 2012 Information Request Seismic Hazard and Screening Report (CEUS Sites)For Recommendation 2.1

ML14092A416
Person / Time
Site:	North Anna
Issue date:	03/31/2014
From:	Heacock D A Virginia Electric & Power Co (VEPCO)
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
14-133
Download: ML14092A416 (71)

Text

VIRGINIA ELECTRIC AND POWER COMPANYRICHMOND, VIRGINIA 23261March 31, 2014U.S. Nuclear Regulatory Commission Serial No. 14-133Attention:

Document Control Desk NL&OSIWDC ROWashington, DC 20555 Docket Nos. 50-338/339 License Nos. NPF-4/7VIRGINIA ELECTRIC AND POWER COMPANYNORTH ANNA POWER STATION UNITS I AND 2RESPONSE TO MARCH 12, 2012 INFORMATION REQUESTSEISMIC HAZARD AND SCREENING REPORT (CEUS SITES) FORRECOMMENDATION 2.1

References:

1. NRC Letter, "Request for Information Pursuant to Title 10 of the Code of FederalRegulations 50.54(f)

Regarding Recommendations 2.1, 2.3, and 9.3, of the Near-Term Task Force Review of Insights from the Fukushima Dai-ichi Accident,"

datedMarch 12, 20122. NEI letter to NRC, Proposed Path Forward for NTTF Recommendation 2.1:Seismic Reevaluations, dated April 9, 20133. NRC Letter, Electric Power Research Institute Final Draft Report 3002000704, "Seismic Evaluation Guidance:

Augmented Approach for the Resolution of Near-Term Task Force Recommendation 2.1: Seismic,"

as an Acceptable Alternative tothe March 12, 2012, Information Request for Seismic Reevaluations, dated May 7,20134. EPRI Report 1025287, Seismic Evaluation Guidance:

Screening, Prioritization andImplementation Details (SPID) for the Resolution of Fukushima Near-Term TaskForce Recommendation 2.1: Seismic5. NRC Letter, Endorsement of EPRI Final Draft Report 1025287, "SeismicEvaluation Guidance,"

dated February 15, 2013On March 12, 2012, the Nuclear Regulatory Commission (NRC) issued Reference 1 toall power reactor licensees and holders of construction permits in active or deferredstatus. Enclosure 1 of Reference 1 requested each addressee in the Central andEastern United States (CEUS) to submit a Seismic Hazard and Screening Report within1.5 years from the date of Reference 1.In Reference 2, the Nuclear Energy Institute (NEI) requested NRC agreement to delaysubmittal of the final CEUS Seismic Hazard and Screening Reports so that an update tothe Electric Power Research Institute (EPRI) ground motion attenuation model could becompleted and used to develop that information.

NEI proposed that descriptions ofsubsurface materials and properties and base case velocity profiles be submitted to theNRC by September 12, 2013, with the remaining seismic hazard and screening information submitted by March 31, 2014. NRC agreed with that proposed path forwardin Reference

3. A i Serial No. 14-133Docket Nos. 50-338/339 Page 2 of 3Reference 4 contains industry guidance and detailed information to be included in theSeismic Hazard and Screening Report submittals.

NRC endorsed this industryguidance in Reference 5.The attached Seismic Hazard and Screening Report for North Anna Power Stationprovides the information described in Section 4 of Reference 4 in accordance with theschedule identified in Reference 2.If you have any questions regarding this information, please contact Mr. Thomas Shaubat (804) 273-2763.

Sincerely, David A. HeacockPresident and Chief Nuclear Officer VICK! L. HULLVirginia Electric and Power Company Notary PublicCommonwealth of Virginia140542My Commission Expires May 31, 2014COMMONWEALTH OF VIRGINIA

--..........-

-COUNTY OF HENRICOThe foregoing document was acknowledged before me, in and for the County and Commonwealth aforesaid, todayby David A. Heacock, who is President and Chief Nuclear Officer of Virginia Electric and Power Company.

He hasaffirmed before me that he is duly authorized to execute and file the foregoing document in behalf of that company,and that the statements in the document are true to the best of his knowledge and belief.Acknowledged before me this l day of -2014.My Commission Expires:

L IIA C20 /Notary PublicCommitments made in this letter: No new regulatory commitments

Attachment:

Seismic Hazard and Screening Report Serial No. 14-133Docket Nos. 50-338/339 Page 3 of 3cc: U.S. Nuclear Regulatory Commission, Region IIRegional Administrator Marquis One Tower245 Peachtree Center Ave. NESuite 1200Atlanta, Georgia 30303-1257 Dr. V. Sreenivas Project Manager -North AnnaU.S. Nuclear Regulatory Commission One White Flint North, Mail Stop 08 G-9A11555 Rockville PikeRockville, MD 20852-2738 Martha BarillasProject Manager -SurryU.S. Nuclear Regulatory Commission One White Flint North, Mail Stop 08 G-9A11555 Rockville PikeRockville, MD 20852-2738 NRC Senior Resident Inspector North Anna Power StationJ. E. Reasor, Jr.Old Dominion Electric Cooperative Innsbrook Corporate Center, Suite 3004201 Dominion Blvd.Glen Allen, Virginia 2306050.54fSeismic.

Resource@nrc.gov Serial No. 14-133Docket Nos. 50-338/339 ATTACHMENT SEISMIC HAZARD AND SCREENING REPORTMarch 2014VIRGINIA ELECTRIC AND POWER COMPANY (DOMINION)

NORTH ANNA POWER STATION UNITS 1 AND 2 North Anna Power Station Units I and 2Seismic Hazard and Screening ReportExecutive SummaryFollowing the accident at the Fukushima Daiichi nuclear power plant resulting from the March11, 2011, Great Tohoku Earthquake and subsequent

tsunami, the NRC established a NearTerm Task Force (NTTF) to conduct a systematic review of NRC processes and regulations andto determine if the agency should make additional improvements to its regulatory system.Subsequently, the NRC issued a 10 CFR 50.54(f) letter (Reference 7.1) that requestsinformation to assure that selected recommendations from the NTTF are addressed by U.S.nuclear power plants. Recommendation 2.1: Seismic involves reevaluation of the seismichazard at plant sites consistent with present-day NRC requirements.

The 10 CFR 50.54(f) letterrequests licensees to re-evaluate the seismic hazard for applicable reactor units. Depending onthe comparison of the re-evaluated seismic hazard and the current design basis, a riskassessment may be required.

Based upon the results of risk evaluations, where performed, the10 CFR 50.54(f) letter indicates that NRC staff will determine whether additional regulatory actions are necessary.

This report provides the information requested in items (1) through (7) of the Enclosure 1section titled "Requested Information" of the 50.54(f) letter for North Anna Power Station.

Inproviding this information, Dominion followed the guidance provided in Electric Power ResearchInstitute (EPRI) Report 1025287, Seismic Evaluation Guidance:

Screening, Prioritization, andImplementation Details (SPID) for the Resolution of Fukushima Near-Term Task ForceRecommendation 2.1: Seismic (Reference 7.2).In response to the 50.54(f) letter, and following the guidance provided in Reference 7.2, aseismic hazard reevaluation was performed.

For screening

purposes, a Ground MotionResponse Spectrum (GMRS) was developed.

The comparison of the GMRS with the safeshutdown earthquake (SSE) indicates that North Anna Units 1 and 2 screen-in for a riskevaluation, along with a high-frequency confirmation and Spent Fuel Pool evaluation.

A seismicprobabilistic risk assessment (SPRA) will be performed for North Anna in accordance with theguidance in EPRI Report 1025287 (SPID).EPRIo Report 3002000704, Augmented

Approach, Seismic Evaluation Guidance:

Augmented Approach for the Resolution of Fukushima Near-Term Task Force Recommendation 2.1:Seismic (Reference 7.3), has been developed as the process for evaluating selected criticalplant equipment prior to completing plant seismic risk evaluations.

In accordance with thisguidance, North Anna screens in for performance of the Expedited Seismic Evaluation Process(ESEP) as an interim measure.Seismic core damage frequency (CDF) calculations have been performed by EPRI for plants inthe Central and Eastern United States (CEUS) using the plant capacities from the Individual Plant Examination of External Events (IPEEE) program and the recently updated seismichazard curves. The results of these calculations for North Anna Units 1 and 2 support theconclusion of the NRC GI-199 Safety/Risk Assessment (Reference 7.17) that "Overall seismiccore damage risk estimates are consistent with the Commission's Safety Goal PolicyStatement..."

and "...the current seismic design of operating reactors provides a safety marginto withstand potential earthquakes exceeding the original design basis" as indicated in NEI letterto NRC dated March 12, 2014 (Reference 7.16).

North Anna Power Station Units 1 and 2 Seismic Hazard and Screening ReportTable of ContentsE xe cutive S u m m a ry ......................................................................................

i1 .0 In tro d u c tio n .................................................................................................................

12.0 Seismic Hazard Reevaluation

................................................................................

22.1 Regional and Local Geology ........................................................................

22.2 Probabilistic Seismic Hazard Analysis

........................................................

32.2.1 Probabilistic Seismic Hazard Analysis Results ................................

32.2.2 Base Rock Seismic Hazard Curves ..................................................

42.3 Site Response Evaluation

............................................................................

42.3.1 Description of Subsurface Material

..................................................

42.3.2 Development of Base Case Profiles and Nonlinear MaterialP ro p e rtie s .......................................................................................

..52.3.3 Randomization of Base Case Profiles

.............................................

112.3.4 Input Spectra .....................................................................................

122.3.5 Methodology

....................................................................................

142.3.6 Amplification Functions

.....................................................................

152.3.7 Control Point Seismic Hazard Curves .............................................

262.4 Control Point Response Spectra .................................................................

283.0 Design Basis Earthquake

.........................................................................................

313.1 Description of SSE Spectral Shape .............................................................

313.2 Control Point Elevation

................................................................................

324.0 Screening Evaluation

.............................................................................................

334.1 Risk Evaluation Screening (1 to 10 Hz) ........................................................

334.2 High Frequency Screening

(> 10 Hz) ..........................................................

334.3 Spent Fuel Pool Evaluation Screening (1 to 10 Hz) ....................................

335.0 Interim Actions and Assessments

............................................................................

345.1 Expedited Seismic Evaluation Process ........................................................

345.2 North Anna Units 1 and 2 Risk Estimates

...................................................

345.3 Previous Evaluations

-including Beyond Design Basis Seismic Inputs ..... 355.3.1 IPEEE and USI A-46 Efforts ............................................................

355.3.2 Walkdowns to Address NTTF Recommendation 2.3: Seismic .........

365.3.3 Actions Following M5.8 Mineral Earthquake of August 23, 2011 ..... 366 .0 C o n c lu s io n s .................................................................................................................

3 87 .0 R e fe re n c e s ..................................................................................................................

3 9Appendix A Tabulated Dataii North Anna Power Station Units I and 2Seismic Hazard and Screening Report

1.0 INTRODUCTION

Following the accident at the Fukushima Daiichi nuclear power plant resulting fromthe March 11, 2011, Great Tohoku Earthquake and subsequent

tsunami, the NRCestablished a Near Term Task Force (NTTF) to conduct a systematic review of NRCprocesses and regulations and to determine if the agency should make additional improvements to its regulatory system. The NTTF developed a set ofrecommendations intended to clarify and strengthen the regulatory framework forprotection against natural phenomena.

Subsequently, the NRC issued a 10 CFR50.54(f) letter (Reference 7.1) that requests information to assure that theserecommendations are addressed by all U.S. nuclear power plants. The 50.54(f)letter requests that licensees and holders of construction permits under 10 CFR Part50 reevaluate the seismic hazards at their sites against present-day NRCrequirements.

The comparison between the reevaluated seismic hazard and thecurrent design basis will result in either no further risk evaluation or the performance of a seismic risk assessment.

Risk assessment approaches acceptable to the NRCstaff include a seismic probabilistic risk assessment (SPRA) or a seismic marginassessment (SMA). Based upon this information, the NRC staff will determine whether additional regulatory actions are necessary.

This report provides the information requested in items (1) through (7) of theEnclosure 1 section titled "Requested Information" of the 50.54(f) letter for NorthAnna Power Station Units 1 and 2, located in Louisa County, Virginia.

In providing this information, Virginia Electric and Power Company (Dominion) followed theguidance provided in Electric Power Research Institute (EPRI) Report 1025287,Seismic Evaluation Guidance:

Screening, Prioritization, and Implementation Details(SPID) for the Resolution of Fukushima Near-Term Task Force Recommendation 2.1: Seismic (Reference 7.2). EPRI Report 3002000704, Augmented

Approach, Seismic Evaluation Guidance:

Augmented Approach for the Resolution of Fukushima Near-Term Task Force Recommendation 2.1: Seismic (Reference 7.3), wasdeveloped as the process for evaluating selected critical plant equipment prior toperforming the complete plant seismic risk evaluations.

In response to the 50.54(f) letter and following the guidance provided in Reference 7.2, a seismic hazard reevaluation was performed.

For screening

purposes, aGround Motion Response Spectrum (GMRS) was developed.

1 of 41 North Anna Power Station Units 1 and 2Seismic Hazard and Screening Report2.0 SEISMIc HAZARD REEVALUATION The North Anna Power Station is located approximately 45 miles northwest ofRichmond,

Virginia, on a peninsula on the southern shore of Lake Anna. This placesthe plant in the central portion of the Piedmont physiographic province.

Bedrockwithin the Piedmont is metamorphic, consisting of granites,

gneisses, and schists.The bedrock typically is deeply weathered into a saprolite mantle up to approximately 100 ft thick. Detailed studies carried out during the siting investigation for NorthAnna Units 1 and 2, and more recently for the proposed North Anna Unit 3, showthat there are no capable faults within the site vicinity.

The reactor buildings arefounded on competent

bedrock, about 70 ft below the plant grade of El. 271 ft.For the purpose of establishing a design basis earthquake (DBE) (also referred to asthe Safe Shutdown Earthquake (SSE)) for North Anna, it was assumed that anearthquake equal to the largest shock associated with the Arconia Syncline mightoccur close to the site area. With the epicenter of a shock similar to the 1875intensity-VII Arconia earthquake shifted to the vicinity of the site, it was estimated that the maximum horizontal ground acceleration at the rock surface would be lessthan 0.12g. Accordingly, the SSE for structures founded on rock was taken at 0.12gfor horizontal ground motion and two-thirds that value for vertical ground motion. Forstructures founded on soil, the SSE was taken at 0.18g for horizontal motion and0.12g for vertical motion.2.1 REGIONAL AND LOCAL GEOLOGYThe site is located in the central portion of the Piedmont physiographic province withthe Blue Ridge province about 40 miles to the west and the Coastal Plain provinceabout 15 miles to the east. The Piedmont terrain is characterized by gently slopingupland areas and broad, relatively shallow valleys.

The Piedmont Upland section isunderlain by Late Precambrian and Paleozoic age crystalline rocks. The crystalline rocks consist of deformed and metamorphosed sedimentary, igneous and volcanicrocks, intruded by mafic dikes and granitic plutons.

The North Anna site is located inthe Chopawamsic belt, which is bounded on the west and east by the Chopawamsic and Spotsylvania thrust faults, respectively.

The belt comprises the Chopawamsic Formation and the Ta River Metamorphic Suite, which is overlain unconformably bythe Quantico Formation and intruded by rocks of the Falmouth Intrusive Suite.North Anna Units 1 and 2 are located on a peninsula on the southern shore of LakeAnna, approximately 45 miles northwest of Richmond, Virginia.

The reactor buildings are founded on competent bedrock; other principal structures are founded onweathered bedrock or on structural fill overlying bedrock.

The bedrock has beenweathered unevenly into saprolitic soils of varying thickness, ranging from a few feetto as much as 100 ft below original grade. No capable tectonic sources exist in thesite vicinity that would cause surface deformation in the site area.2 of 41 North Anna Power Station Units 1 and 2Seismic Hazard and Screening Report2.2 PROBABILISTIC SEISMIC HAZARD ANALYSISThe information provided in Section 2.2.1 was developed for EPRI by LettisConsultants International (LCI) as part of an industry-wide effort (References 7.5 and7.6). EPRI/LCI also provided the baseline hard rock probabilistic seismic hazardanalysis (PSHA) calculation and deaggregation data for North Anna (Reference 7.27). Using the hard rock hazard and de-aggregation data, Bechtel PowerCorporation performed the site response analyses and developed the control pointhazard curves and response spectra for the North Anna site (Reference 7.10), asdescribed in Sections 2.3 and 2.4.2.2.1 PROBABILISTIC SEISMIC HAZARD ANALYSIS RESULTSIn accordance with the 50.54(f) letter and following the guidance in the SPID(Reference 7.2), a PSHA was completed and reported in LCI Project 1041 Report(Reference 7.5) using the recently developed U.S. Nuclear Regulatory Commission (NRC) Report NUREG-2115, "Central and Eastern United States Seismic SourceCharacterization for Nuclear Facilities,"

(CEUS-SSC)

(Reference 7.7) together withthe updated EPRI Report 3002000717, "EPRI (2004, 2006) Ground-Motion Model(GMM) Review Project,"

(Reference 7.8). For the PSHA, a lower-bound momentmagnitude of 5.0 was used, as specified in the 50.54(f) letter.For the PSHA, the CEUS-SSC background seismic source zones out to a distance of400 miles (640 km) around North Anna were included.

This distance exceeds the200 mile (320 km) recommendation contained in NRC Regulatory Guide (RG) 1.208"A Performance-Based Approach to Define the Site-Specific Earthquake GroundMotion,"

(Reference 7.9) and was chosen for completeness.

Background sourcesincluded in this site analysis are the following:

1. Atlantic Highly Extended Crust (AHEX)2. Extended Continental Crust-Atlantic Margin (ECCAM)3. Mesozoic and younger extended prior -narrow (MESE-N)4. Mesozoic and younger extended prior -wide (MESE-W)5. Midcontinent-Craton alternative A (MIDCA)6. Midcontinent-Craton alternative B (MIDCB)7. Midcontinent-Craton alternative C (MIDCC)8. Midcontinent-Craton alternative D (MIDCD)9. Non-Mesozoic and younger extended prior -narrow (NMESE-N)

10. Non-Mesozoic and younger extended prior -wide (NMESE-W)

11. Paleozoic Extended Crust narrow (PEZN)12. Paleozoic Extended Crust wide (PEZW)13. St. Lawrence Rift, including the Ottawa and Saguenay grabens (SLR)14. Study region (STUDYR)Large magnitude CEUS-SSC modeled sources Repeated Large Magnitude Earthquake (RLME) within 1,000 km of the site, were included in the analysis.

These3 of 41 North Anna Power Station Units I and 2Seismic Hazard and Screening Reportsources are:1. Charleston

2. Eastern Rift Margin Fault northern segment (ERM-N)3. New Madrid Fault System (NMFS)4. Wabash ValleyFor each of the above background and RLME sources, the mid-continent version ofthe updated CEUS EPRI GMM (Reference 7.8) was used.2.2.2 BASE ROCK SEISMIC HAZARD CURVESConsistent with the industry report template, base rock seismic hazard curves arenot provided.

Seismic hazard curves are provided in Section 2.3.7 at the controlpoint elevation.

2.3 SITE RESPONSE EVALUATION Following the guidance contained in Seismic Enclosure 1 of the 50.54(f) letter and inthe SPID, for nuclear power plant sites that are not sited on hard rock (shear wavevelocity

> 9200 ft/sec [SPID]),

a site response analysis was performed for NorthAnna Units 1 and 2.2.3.1 DESCRIPTION OF SUBSURFACE MATERIALBedrock at North Anna consists mainly of metamorphic gneiss and schist. There hasbeen extensive in-place weathering of the rock. The rock has weathered completely into saprolitic soil near the ground surface.The general subsurface profile at North Anna can be divided into 6 zones:I Residual clays and clayey silts -all structure of parent rock is lost.IIA Saprolite

-medium dense silty sand, with some fine-grained layers.IIB Saprolite

-very dense silty sand.III Weathered rock -core stone more than 50% of volume of overall mass.Ill-IV Moderately weathered to slightly weathered rock.IV Parent rock -slightly weathered to fresh rock.The weathering across the site is uneven, and the thickness of the various zonesvaries widely and randomly throughout the site. The rock zones are defined by bothrock quality designation (RQD) and shear wave velocity.

Considering the original site4 of 41 North Anna Power Station Units I and 2Seismic Hazard and Screening Reportinvestigations at the Units 1 and 2 site and the more recent site investigations at theproposed site for Unit 3 (which shares the same geologic characteristics)

(Reference 7.11), the North Anna site is well-characterized and extensively investigated withabundant high-quality data (>200 borings, including five deep borings with shear wavevelocity measurements from Suspension P-S logging),

which reduces epistemic uncertainty in the site properties.

These data also provide information to characterize the aleatory variation in layer thickness and shear wave velocity across the site.Table 2.3.1-1 provides a brief description of the subsurface material in terms of thegeologic units and layer thicknesses.

This table includes best estimate values ofshear wave velocity (Vs), compressive wave velocity (Vp), unit weight and Poisson's ratio. Structures at North Anna Units 1 and 2 were designed and analyzed using auniform groundwater level at El. 256 ft.Table 2.3.1-1:

Geologic profile and estimated layer thicknesses for North AnnaDepthRange(t) .'.,". Soil/Rock Density V3* VP..V Poisson's (ft) Description jPf (ft/sec) s(ftlec)

Ratio0 -3 Zone IIA Saprolite 125 795 1655 0.353 (2)- 47 Zone III Weathered Rock 150 4,251 10,410 0.4047- Zone Ill-IV Moderately to Slightly 163 5,449 10,820 0.33Weathered RockZone Ill-IV Moderately to Slightly 163 5,177 10,280 0.33Weathered Rock101-136 Zone IV Slightly Weathered to Fresh 164 8,800 15,680 0.27Rock136+ Zone IV Slightly Weathered to Fresh 164 9,740 17,350 0.27RockNotes:(1) Depth below plant grade of El. 271 ft.(2) As described in Section 3.2, the Control Point is defined as the foundation bearing elevation of the highest rock-supported, safety-related structure, which, in the case of North Anna, is the base of the Casing Cooling Tank andPumphouse foundation is at El. 268 ft, or 3 ft below grade.(3) Best estimate values.2.3.2 DEVELOPMENT OF BASE CASE PROFILES AND NONLINEAR MATERIAL PROPERTIES Shear wave velocity measurements in the bedrock for North Anna Units 1 and 2were made in 3 boreholes with a Birdwell 3D Velocity Recorder down to a maximumdepth of 128 ft below original grade of El. 304 ft, i.e., down to El. 176 ft.Confirmatory seismic cross-hole tests were performed during construction of theunits. Suspension P-S logging was performed in 5 boreholes for proposed NorthAnna Unit 3, with the deepest reading at approximately El. 22 ft. From the Unit 3data, two Vs profiles were developed.

Profile 1 is the lower bound profile that5 of 41 North Anna Power Station Units I and 2Seismic Hazard and Screening Reportrepresents mainly weathered and/or fractured rock encountered at the site whileProfile 2 is the upper bound profile that represents mainly unweathered and/orunfractured rock encountered at the site. Profile 1 and Profile 2 capture the majorityof the measured Vs values in the bedrock, as well as Vs values correlated from otherparameters (such as RQD). The best estimate Vs profile (VBE) is the log-mean of theProfile 1 and Profile 2 Vs values. The differences between the best estimate andProfiles 1 and 2, i.e., (VBE -Profile 1) and (Profile 2 -VBE) are considered toapproximate one standard deviation.

The Vs data from North Anna Units 1 and 2, along with visual descriptions of the rockobtained from North Anna Units 1 and 2 borings, and the corresponding RQD valuescompare well with the more extensive North Anna 3 measurements.

Consequently, it was determined that the Profile 1 and Profile 2 Vs values and the VBE profilederived for North Anna Unit 3 could be used for North Anna Units 1 and 2 with onlyminor modifications.

The Vs values for the Zone IIA saprolite were obtained frommeasurements from North Anna Unit 3.As noted in Section 2.3.1, the North Anna site is well-characterized and extensively investigated with abundant high-quality data (>200 borings, including five deep boringswith Suspension P-S logging shear wave velocity measurements),

which reducesepistemic uncertainty in the site properties.

These data also provide information tocharacterize the aleatory variation in layer thickness and Vs across the site. Thesevariations are included in considerations of aleatory uncertainties for the base-case profile.

No alternate profiles are considered because of the significant amount ofrecent site specific data and the resulting relative insignificance of epistemic uncertainty with respect to the aleatory variability for this site. The single base caseprofile (VBc) is thus the VBE profile described in the previous paragraph, with minorrounding.

The VBc profile selected for use is presented in Table 2.3.2-1.

Profile 1 and Profile 2are included in the table. As described in Section 2.3.3, Profiles 1 and 2 are used indefining the aleatory uncertainty for the randomization process.6 of 41 North Anna Power Station Units I and 2Seismic Hazard and Screening ReportTable 2.3.2-1:

Geologic profile and estimated layer thicknesses for North Anna-Depth Vs (ft/sec).Range Thickness

,*Soil/Rock Profile.

Profile(ft) (ft) Description VBc 1 20 -3 3 Zone IIA Saprolite 795 560(') 1030(1)3 -47 44 Zone III Weathered Rock 4250 3,115 5,80047-66 19 Zone Ill-IV Moderately to Slightly 5450 4,475 6,635Weathered Rock66- 101 35 Zone IllI-IV Moderately to Slightly 5180 3,450 7,770Weathered Rock101-136 35 Zone IV Slightly Weathered to Fresh 8800 8,800 8,800Rock136+ -Zone IV Slightly Weathered to Fresh 9740 9,740 9,740Rock I I INote:(1) Values are +/- 1 standard deviation from VBc for saprolite 7 of 41 North Anna Power Station Units I and 2Seismic Hazard and Screening ReportNorth Anna Power Station Units I and 2 Seismic Hazard and Screening ReportShear Wave Velocity, Vs (ft/s)4000 6000 80000200028026024022010000-Best Estimate0200180160140120100Figure 2.3.2-1:

Base case Vs profile (VBc) for North Anna8 of 41 North Anna Power Station Units 1 and 2Seismic Hazard and Screening Report2.3.2.1 SHEAR MODULUS AND DAMPING CURVESThe shear modulus values of the Zone Ill-IV and Zone IV bedrock are independent ofshear strain. The ratios of shear modulus values (G) to the maximum shear modulusvalue (GmAx) of the Zone IIA saprolite are the average of the 0 to 20 ft and 20 ft to 50ft curves provided in EPRI TR-102293, "Guidelines for Determining Design BasisGround Motions,"

(Reference 7.12) and are based on the results of three resonantcolumn and torsional shear (RCTS) tests on the saprolite performed for the recentNorth Anna Unit 3 investigation.

These values are shown versus shear strain inTable 2.3.2-2 and are plotted in Figure 2.3.2-2.The G/GMAx values of the Zone III weathered rock are based on values for relatively soft rock in Sun et al (Reference 7.13). These values are shown versus shear strainin Table 2.3.2-2 and are plotted in Figure 2.3.2-2.As with the shear modulus, the damping ratio (D) values for the Zone Ill-IV and ZoneIV bedrock are independent of shear strain. A best estimate value of 1% is used forthese materials.

The damping values of the Zone IIA saprolite are the average of the 0 to 20 ft and 20ft to 50 ft curves provided in EPRI TR-102293, and are based on the results of threeRCTS tests on the saprolite performed for the recent North Anna Unit 3 investigation.

These values are shown versus shear strain in Table 2.3.2-2 and are plotted inFigure 2.3.2-3.

The damping values of the Zone III weathered rock are shown inTable 2.3.2-2 and plotted in Figure 2.3.2-3.

Note that for analysis, values of dampingare truncated at 15%.The variation in damping is accounted for later in the randomization process.Table 2.3.2-2:

G/GMAx and Damping Ratio for North Anna(%)i G Damping Ratio D, (%)Zone hlA Zone IlI Zone IA Zone III0.0001 1.00 1.00 1.3 0.60.000316 1.00 1.00 1.3 0.60.001 0.99 1.00 1.6 0.60.00316 0.94 1.00 2.4 0.60.01 0.79 1.00 4.4 0.60.0316 0.57 0.98 8.2 0.60.1 0.32 0.87 14.3 2.70.316 0.15 0.63 20.6 8.21.0 0.05 0.33 27.9 17.09 of 41 North Anna Power Station Units I and 2Seismic Hazard and Screening Report1.00. ....................

0.900.800.700.60EW 0.50-,,-Zone IIA0.40 \ -Zone III0.200.100.0001 0.0010 0.0100 0.1000 1.0000Shear Strain (%)Figure 2.3.2-2:

GM~x/G versus shear strain for North Anna302520715-Zone IIA10 -Zone III500.0001 0.0010 0.0100 0.1000 1.0000Shear Strain (%)Figure 2.3.2-3:

Damping ratio versus shear strain for North Anna10 of 41 North Anna Power Station Units 1 and 2Seismic Hazard and Screening Report2.3.2.2 KAPPAGiven the shallow nature of the site profile and the high shear wave velocities, onlythe 0.006 seconds reference rock component of the local site attenuation parameter was explicitly incorporated into the site response analysis.

2.3.3 RANDOMIZATION OF BASE CASE PROFILESAs discussed in Section 2.3.2, considering the original site investigations for NorthAnna Units 1 and 2 and the more recent site investigations at the proposed site forUnit 3, the epistemic uncertainty is considered insignificant relative to the observedaleatory variability for this site. Thus, a single base-case profile was considered for thesite as presented in Table 2.3.2-1 and Figure 2.3.2-1.

The variations in shear-wave

velocity, layer thicknesses, and shear-modulus reduction and damping curves areincluded in consideration of aleatory uncertainties for the base-case profile through therandomization process.The soil profile simulation was performed to generate sets of site-specific simulated (randomized) soil profiles to represent the dynamic properties of the soil columnswhile considering the uncertainty associated with each of these properties.

Thesimulated profiles were used in site response analysis using random vibration theory(RVT).A total of 60 simulated profiles were generated using the following inputs based onavailable field data:" Estimates of soil and rock stratum thicknesses and their range of variation

• Estimates of mean and standard deviation of shear-wave velocity for each soil orrock stratum* Strain-dependent GIG,,ax (also referred to as GIGo) and damping curvesassigned to site-specific strata and their uncertainties

• Cross correlations between adjacent layers are also assigned for each soil orrock property to prevent unreasonable variations between them and to guarantee that the total depth is also within a specified rangeThe thicknesses of the soil and rock strata were also simulated with +/-20 bounds asshown in Table 2.3.3-1.

The aleatory uncertainty in the shear-wave velocity wasmodeled using a log-normal distribution with the reported best-estimate valuescorresponding to the median (geometric mean) of the distribution.

Using Profile 1and Profile 2 (Table 2.3.2-1),

the aleatory uncertainty is defined by qInVs. The valuesof the median shear-wave velocities and IlnVs used for profile simulation arepresented in Table 2.3.3-1.

Note that for the purposes of the randomization and siteresponse

analyses, the 3 ft of Zone IIA saprolite above the control point isconsidered insignificant due to its limited thickness and the large elastic threshold (insignificant strain dependency) of the material below the control point.11 of 41 North Anna Power Station Units I and 2Seismic Hazard and Screening ReportA set of 60 simulated profiles was generated which represents the simulated freefield subsurface conditions.

The simulation includes variation of the shear wavevelocity, stratum thicknesses, strain dependent GIGmax and damping curves fornonlinear

material, and damping ratios for linear material.

A limit of +/-2a about the median value for shear wave velocity, damping ratio, andshear-modulus reduction and damping curves in each stratum was assumed.

Theselimits were placed to prevent unrealistic variation of the parameters.

In the case thata variation exceeds the limit, a new random variable was computed.

Furthermore, the maximum value on the damping curves is limited to 15%.The Reference 7.14 correlation model is used to obtain the between-stratum correlation as a function of the stratum interface depth and the average thickness ofthe two correlated strata. The model uses coefficients based on the U. S. Geological Survey (USGS) site classification A, which is based on the average Vs of the top 30meters (100 ft) of soil (Vs30).Table 2.3.3-1:

Properties of the site profile at the GMRS location.

Stratum Mean e Elevation Top [ft] Unit Wt. [kcfj Damping [%]/ Vs [ftlsec] III 44 19 268 0.150 0.60 4250 0.3Ill-IVa 19 7 224 0.163 1.00 5450 0.2IIl-IVb 35 12 205 0.163 1.00 5180 0.4IV 35 12 170 0.164 1.00 8800 0.1HS .... 135 0.164 1.00 9200 0.02.3.4 INPUT SPECTRAConsistent with the guidance in Appendix B of the SPID, input Fourier amplitude spectra and associated acceleration response spectra were defined for a singlerepresentative earthquake magnitude using two different assumptions regarding theshape of the seismic source spectrum (single-corner and double-corner).

A range of11 different input amplitudes (peak ground accelerations (PGA) ranging from 0.01gto 1.5 g) were used in the site response analyses.

These specific loading levels areidentified later in the report as 'GO01, G005, G010, G020, G030, G040, G050, G075,G100, G125, and G150' based on the suite of 11 specific input PGA levels. Thecharacteristics of the seismic source and upper crustal attenuation properties assumed for the analysis of the North Anna site were the same as those identified inTables B-4, B-5, B-6 and B-7 of the SPID as appropriate for typical CEUS sites. Theinput spectra for the single-corner and double-corner seismic source spectra areshown in Figures 2.3.4-1a and 2.3.4-1b.

These spectra are defined at a suite of 38spectral frequencies between 0.1 -100 Hz.12 of 41 North Anna Power Station Units I and 2Seismic Hazard and Screening ReportNorth Anna: M6.5, Input Spectra-Single Corner10Target PGA = 0.01 -Target PGA = 0.05-Target PGA = 0.1 -Target PGA = 0.20.001 -Target PGA = 0.3 -Target PGA = 0.50Target PGA = 0.4 -Target PGA = 0.75-Target PGA = 1 -Target PGA = 1.250- Target PGA = 1.50.1 1 10 100Frequency (Hz)Figure 2.3.4-1a:

Input spectra based on the single-corner seismic source model forthe suite of 11 PGA levels for a spectral damping of 5%13 of 41 North Anna Power Station Units 1 and 2Seismic Hazard and Screening ReportNorth Anna Power Station Units I and 2 Seismic Hazard and Screening ReportNorth Anna: M6.5, Input Spectra-Double Corner100.10.01Target PGA= 0.01 -Target PGA = 0.05-Target PGA = 0.1 -Target PGA = 0.2-.-Target PGA = 0.3 -Target PGA = 0.5Target PGA 0.4 -Target PGA = 0.75-Target PGA = 1 -Target PGA = 1.25-Target PGA = 1.50.001 10.1 1 10 100Frequency (Hz)Figure 2.3.4-1 b: Input spectra based on the double-corner seismic source model forthe suite of 11 PGA levels for a spectral damping of 5%2.3.5 METHODOLOGY Site response analyses were carried out to evaluate the amplification factorscorresponding to the 60 simulated (randomized) profiles for each of the input hard-rock spectra.

RVT is employed consistent with existing NRC requirements and theSPID. Moreover, the guidance contained in Appendix B of the SPID on incorporating the applicable uncertainties in the site response model and source spectra wasfollowed.

For the 60 generated

profiles, described in Section 2.3.3, and input motions,described in Section 2.3.4, the site amplification is computed as the ratio between5% damped geologic outcrop pseudo acceleration response spectrum at the controlpoint and bedrock.

The analysis is carried out at 301 frequency points ranging from0.1 to 100 Hz and equally spaced in logarithmic space. The median (computed asthe logarithmic mean) and the logarithmic standard deviation (Log-SD) of the siteamplification at each frequency are then computed.

14 of 41 North Anna Power Station Units I and 2Seismic Hazard and Screening ReportThe probabilistic seismic hazard curves are defined at the following 38 frequencies (in units of Hz):100 90 80 70 60 50 45 40 35 30 25 20 15 12.5 10 9 8 7 6 5 4 3 2.5 21.5 1.25 1 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.167 0.125 0.1At each of these frequencies, the site amplification is computed using linearinterpolation in log-log space from the 301 site amplification values.2.3.6 AMPLIFICATION FUNCTIONS For the base profile and for each seismological model, the median amplification (exponential of the log-mean amplification factors for 5% damped pseudo spectralacceleration (PSA)) and logarithmic standard deviation (log-SD) are calculated at the38 frequencies of interest for each of the 11 different input amplitudes.

The inputPSA values for the single-corner seismological model are presented in Table 2.3.6-1.The single-corner median amplification factors and log-SD are provided in Tables2.3.6-2 and 2.3.6-3, respectively.

The same information is shown in Figures 2.3.6-1and 2.3.6-2.Similar results for the double-corner seismological model are presented in Table2.3.6-4 through Table 2.3.6-6 and Figure 2.3.6-3 and Figure 2.3.6-4.Generally, the computed amplification is insensitive to loading level due to the high-shear wave velocities in the profile and large elastic threshold (shear strain at whichnonlinear properties start to change).

The exceptions are the high frequency resultscorresponding to the low amplitude input rock motions (target PGA = 0.01g in Figure2.3.4-1a and Figure 2.3.4-1b) which are different due to significantly different distances that result in different response spectral shapes of these input responsespectra compared to higher input levels.15 of 41 North Anna Power Station Units I and 2SesiHardndcenngRpt Seismic Hazard and Screening ReportTable 2.3.6-1:

Input 5% damped PSA values in units of g at eleven loading levels of hardrock median peak acceleration values from O.O1g to 1.50g using the single-corner seismological modelFr~eq. ,Loading Level_______

[Hz] G001 G005 :GOlO G020 G030. G040 G050 G075 G100 ~G125 :G15O0.1 0.000368 0.000630 0.000858 0.00134 0.00174 0.00217 0.00253 0.00350 0.00439 0.00532 0.006230.125 0.000639 0.00108 0.00144 0.00221 0.00285 0.00352 0.00410 0.00562 0.00704 0.00851 0.009950.167 0.00124 0.00214 0.00283 0.00429 0.00549 0.00675 0.00783 0.0107 0.0133 0.0160 0.01870.2 0.00181 0.00319 0.00423 0.00640 0.00818 0.0100 0.0116 0.0158 0.0197 0.0237 0.02760.3 10.00366 0.00693 0.009351 0.0143 0.0183 0.0225 0.0261 0.0354 0.0441 0.0531 0.06190.4 0.00544 0.0109 0.0149 0.0230 0.0296 0.0364 0.0423 0.0577 0.0720 0.0867 0.1010.5 0.00704 0.0146 0.0203 0.0316 0.0409 0.0505 0.0588 0.0804 0.100 0.121 0.1410.6 0.00846 0.0182 0.0255 0.0401 0.0519 0.0643 0.0749 0.103 0.128 0.155 0.1810.7 0.00973 0.0215 0.0305 0.0481 0.0626 0.0777 0.0906 0.124 0.156 0.188 0.2200.8 0.0109 0.0247 0.0353 0:0559 0.0729 0.0905 0.106 0.145 0.182 0.220 0.2580.9 0.0119 0.0277 0.0398 10.0634 0.0827 0.103 0.120 0.166 0.208 0.252 0.2941 0.0128 0.0305 0.0441 0.0705 0.0922 0.115 0.134 0.185 0.233 0.282 0.3301.25 0.0148 0.0367 0.0539 0.0869 0.114 0.143 0. 167 0.231 0.291 0.352 0.4131.5 0.0163 0.0423 0.0628 0.102 0.134 0.168 0.197 0.274 0.345 0.418 0.4902 0.0187 0.0521 0.0788 0.129 0.171 0.215 0.253 0.352 0.445 0.540 0.6342.5 0.0205 0.0604 0.0927 0.154 0.204 0.257 0.303 0.424 0.535 0.651 0.7653 0.0217 0.0676 0.105 0.176 0.235 0.296 0.350 0.490 0.620 0.754 0.8874 0.0232 0.0795 0.127 0.215 0.288 0.365 0.432 0.608 0.771 0.940 1.1065 0.0238 0.0886 0.144 0.247 0.333 0.424 0.503 0.710 0.902 1.101 1.2986 0.0240 0.0960 0.159 0.276 0.374 0.477 0.567 0.802 1.021 1.248 1.4727 0.0238 0.102 0.172 0.301 0.410 0.525 0.624 0.886 1.130 1.383 1.6328 0.0234 0.107 0.183 0.323 0.442 0.567 0.676 0.962 1.229 1.505 1.7789 0.0228 0.111 0.193 0.344 0.471 0.606 0.724 1.033 1.320 1.619 1.91410 0.0222 0.114 0.201 0.360 0.496 0.640 0.765 1.094 1.400 1.719 2.03212.5 0.0200 0.116 0.211 0.385 0.535 0.693 10.831 1.195 1.534 1.887 2.23415 0.0180 0.115 0.215 0.400 0.558 0.727 0.874 1.263 1.627 2.004 2.37720 0.0150 0.109 0.215 0.411 0.581 0.764 0.923 1.345 1.741 2.152 2.55825 0.0132 0.101 0.208 0.408 0.584 0.773 0.939 1.379 1.792 2.222 2.64730 0.0121 0.0934 0.198 0.398 0.575 0.767 0.935 1.382 1.803 2.241 2.67535 0.0115 0.0860 0.188 0.384 0.559 0.749 0.917 1.365 1.786 2.225 2.66040 0.0111 0.0795 0.177 0.367 0.539 0.726 10.891 1.333 1.751 2.186 2.61845 0.0109 0.0738 0.166 0.349 0.516 0.699 0.860 1.294 1.703 2.131 2.55450 0.0108 0.0691 0.156 0.332 0.493 0.670 0.827 1.248 1.647 2.065 2.47960 0.0107 0.0619 0.139 0.298 0.446 0.610 0.755 1.148 1.521 1.912 2.30070 0.0106 0.0571 0.125 0.268 0.*401 0.550 0.683 1.043 1.385 1.745 2.10280 0.0106 0.0542 0.114 0.241 0.361 0.494 0.613 0.937 1.246 1.570 1.89290 0.0106 0.0525 10.106 0.219 0.326 10.444 0.550 0.837 11.111 1.399 1.685100 0.0105 0.0513 10.101 0.203 0.297 10.402 0.495 0.747 10.987 1.240 1.49116 of 41 North Anna Power Station Units I and 2SesiHardndcenngRpt Seismic Hazard and Screening ReportTable 2.3.6-2:

Median amplification factors (for 5% damped PSA) developed for the NorthAnna Units I and 2 profile at eleven loading levels of hard rock medianpeak acceleration values from O.Olg to 1.50g using the single-corner seismological modelFrequency L___ LadingLevel

[Hl G001 G005. G010 G020 G030 G040 G050 G075 GIQO G125 G1500.1 1.005 1.007 1.011 1.014 1.016 1.016 1.017 1.019 1.019 1.020 1.0200.125 1.003 1.012 1.016 1.018 1.019 1.019 1.020 1.020 1.020 1.020 1.0200.167 1.004 1.012 1.017 1.020 1.022 1.023 1.024 1.026 1.026 1.027 1.0270.2 1.004 1.013 1.017 1.021 1.022 1.024 1.024 1.026 1.027 1.027 1.0280.3 1.005 1.015 1.019 1.023 1.024 1.026 1.026 1.028 1.029 1.029 1.0300.4 1.007 1.016 1.021 1.025 1.026 1.028 1.028 1.030 1.031 1.031 1.0320.5 1.007 1.018 1.023 1.026 1.028 1.029 1.030 1.031 1.032 1.033 1.0330.6 1.008 1.019 1.024 1.027 1.029 1.030 1.031 1.033 1.033 1.034 1.0340.7 1.010 1.020 1.025 1.029 1.030 1.032 1.032 1.034 1.035 1.035 1.0360.8 1.011 1.022 1.027 1.030 1.032 1.033 1.034 1.035 1.036 1.037 1.0370.9 1.012 1.023 1.028 1.032 1.033 1.034 1.035 1.037 1.037 1.038 1.0381 1.013 1.025 1.030 1.033 1.035 1.036 1.037 1.038 1.039 1.039 1.0401.25 1.018 1.029 1.034 11.037 1.039 1.040 1.041 1.042 1.043 1.044 1.0441.5 1.023 1.035 1.039 1.043 1.044 1.046 1.046 1.048 1.048 1.049 1.0492 1.035 1.048 1.053 1.056 1.058 1.059 1.060 1.061 1.062 1.062 1.0632.5 1.052 1.066 1.071 1.074 1.076 1.077 1.078 1.079 1.080 1.080 1.0813 1.072 1.087 1.093 1.096 1.098 1.099 1.100 1.101 1.102 1.103 1.1034 1.126 1.145 1.151 1.155 1.156 1.158 1.159 1.160 1.161 1.162 1.1625 1.197 1.220 1.227 1.232 1.234 1.235 1.236 1.238 1.239 1.240 1.2406 1.281 1.310 1.317 1.322 1.325 1.326 1.327 1.329 1.330 1.331 1.3327 1.366 1.401 1.409 1.414 1.416 1.418 1.419 1.421 1.423 1.424 1.4258 1.439 1.479 1.487 1.492 1.495 1.497 1.498 1.500 1.502 1.503 1.5049 1.491 11.537 1.544 1.549 1.552 1.554 1.555 1.557 1.558 1.559 1.56010 1.522 1.571 1.578 1.582 1.585 1.586 1.587 1.590 1.591 1.592 1.59212.5 1.515 1.568 1.573 1.575 1.577 1.578 1.579 1.581 1.582 1.582 1.58315 1.451 1.500 1.502 1.502 1.503 1.504 1.504 1.505 1.506 1.506 1.50720 1.356 1.408 1.407 1.406 1.406 1.406 1.406 1.406 1.407 1.407 1.40725 1.320 1.397 1.395 1.393 1.392 1.391 1.391 1.391 1.391 1.392 1.39230 1.304 11.411 1.411 1.410 1.409 1.408 1.408 1.409 1.409 1.410 1.41035 1.296 1.447 1.454 1.454 1.454 1.453 1.453 1.454 1.454 1.455 1.45540 1.284 1.428 1.430 1.428 1.426 1.424 1.424 1.423 1.422 1.422 1.42245 1.277 1.414 1.413 1.408 1.406 1.404 1.403 1.402 1.401 1.401 1.40150 1.273 1.417 1.417 1.412 1.409 1.407 1.406 1.404 1.403 1.403 1.40360 1.268 1.410 1.409 1.399 1.395 1.391 1.389 1.385 1.384 1.383 1.38270 1.266 11.416 1.420 1.412 1.407 1.403 1.400 1.396 1.394 1.393 1.39280 1.264 1.418 1.428 1.423 1.418 1.414 1.412 1.407 1.405 1.404 1.40390 1.262 1.416 11.429 1.423 1.418 1.413 1.410 1.404 1.401 1.399 1.397100 1.260 1.415 11.432 1.429 1.425 1.421 1.418 1.413 1.410 1.407 11.40617 of 41 North Anna Power Station Units 1 and 2SesiHardndcenngRpt Seismic Hazard and Screening ReportTable 2.3.6-3:

Log-SD of the amplification factors (for 5% damped PSA) developed forthe North Anna Units I and 2 profile at eleven loading levels of hard rockmedian peak acceleration values from O.OIg to 1.50g using the single-corner seismological modelFreq. ____ ..1.oading Level ___JHI~L G001 G005 G010 G020 G030... G040 G050 G075 GI 00 G125 G150.0.1 0.00326 0.00537 0.00731 0.00869 0.00943 0.00993 0.0103 0.0108 0.0111 0.0114 0.01160.125 0.00318 0.00796 0.00949 0.00945 0.00941 0.00949 0.00959 0.00989 0.0101 0.0103 0.01040.167 0.00345 0.00820 0.0103 0.0118 0.0126 0.0131 0.0134 0.0140 0.0143 0.0146 0.01480.2 0.00367 0.00851 0.0105 0.0120 0.0127 0.0132 0.0135 0.0141 0.0144 0.0147 0.01480.3 0.0045410.00957 0.0115 10.0129 0.0135 0.0140 10.0143 0.0148 0.0151 0.0153 0.01550.4 0.00530 0.0105 0.0124 0.0137 0.0143 0.0148 0.0150 0.0155 0.0158 0.0160 0.01610.5 0.00604 0.0113 0.0131 0.0144 0.0150 0.0154 0.0157 0.0161 0.0164 0.0166 0.01670.6 0.00682 0.0120 0.0138 0.0150 0.0156 0.0160 0.0162 0.0167 0.0169 0.0171 0.01720.7 0.00764 0.0128 0.0146 0.0157 0.0162 0.0166 0.0168 0.0172 0.0175 0.0177 0.01780.8 0.00855 0.0137 0.0154 0.0164 0.0169 0.0173 0.0175 0.0179 0.0181 0.0183 0.01840.9 0.009541 0.0146 0.0162 0.0173 0.0177 0.0181 0.0183 0.0186 0.0189 0.0190 0.01911 0.0106 0.016 0.0172 0.0182 0.0186 0.0189 0.0191 0.0195 0.0197 0.0199 0.02001.25 0.0138 0.019 0.0201 0.0209 0.0213 0.0216 0.0218 0.0221 0.0223 0.0224 0.02251.5 0.0176 0.022 0.0237 0.0244 0.0248 0.0251 0.0252 0.0255 0.0256 0.0258 0.02592 0.0272 0.032 0.0331 0.0338 0.0341 0.0343 0.0344 0.0347 0.0348 0.0349 0.03502.5 0.0397 0.045 0.0457 0.0462 0.0465 0.0467 0.0468 0.0470 0.0472 0.0473 0.04743 0.0552 0.060 0.0613 0.0618 0.0621 0.0623 0.0624 0.0626 0.0628 0.0629 0.06304 0.0951 0.101 0.102 0.102 0.102 0.102 0.103 0.103 0.103 0.103 0.1035 0.143 0.149 0.150 0.150 0.150 0.151 0.151 0.151 0.151 0.151 0.1526 0.187 0.193 0.193 0.193 0.194 0.194 0.194 0.194 0.194 0.195 0.1957 0.214 0.220 0.220 0.220 0.220 0.220 0.220 0.221 0.221 0.221 0.2228 0.224 0.229 0.229 0.229 0.230 0.230 0.230 0.230 0.230 0.231 0.2319 0.220 0.227 0.228 0.228 0.228 0.228 0.228 0.229 0.229 0.229 0.22910 0.212 0.223 0.224 0.225 0.225 0.225 0.226 0.226 0.226 0.227 0.22712.5 0.193 0.221 0.225 0.227 0.228 0.229 0.229 0.230 0.231 0.231 0.23115 0.167 0.216 0.223 0.226 0.228 0.228 0.229 0.230 0.230 0.231 0.23120 0.124 0.189 0.199 0.203 0.204 0.205 0.205 0.206 0.207 0.207 0.20825 0.111 0.178 0.189 0.194 0.196 0.198 0.199 0.200 0.201 0.201 0.20230 0.105 0.161 0.173 0.179 0.181 0.182 0.183 0.185 0.186 0.186 0.18735 0.108 0.150 0.163 0.170 0.172 0.174 0.175 0.176 0.177 0.178 0.17840 0.105 0.132 0.148 0.156 0.158 0.160 0.161 0.162 0.163 0.164 0.16445 0.104 0.124 0.143 0.154 0.158 0.161 0.162 0.165 0.166 0.167 0.16850 0.105 0.115 0.133 0.145 0.149 0.152 0.154 0.157 0.158 0.160 0.16160 0.106 0.108 0.121 0.133 0.138 0.142 0.143 0.146 0.148 0.149 0.15070 0.106 0.103 0.104 0.112 0.117 0.120 10.122 0.126 0.128 0.130 0.13180 0.106 10.106 0.102 0.108 10.112 0.116 0.118 0.122 0.124 0.125 0.290 0.106 0.109 0.104 0.105 0.108 0.111 0.113 0.116 0.118 0.120 0.2100 0.106 0.111 0.104 0.102 0.101 0.101 0.101 0.102 0.103 0.104 0.418 of 41 North Anna Power Station Units 1 and 2SesiHardndcenngRpt Seismic Hazard and Screening ReportTable 2.3.6-4:

Input 5% damped PSA values in units of g at eleven loading levels of hardrock median peak acceleration values from O.O1g to 1.50g using thedouble-corner seismological modelFreq. ________

Loading Level ___ ______,,,[Hz] ~G001. G005 GO1l0 G020. G030 G040ý i*G.050.

G0,75 11,G100.

G125.K G1500.1 0.000184 0.000303 0.000395 0.000573 0.000744 0.000908 0.00105 0.00143 0.00178 0.00213 0.002490.125 0.000278 0.000461 0.000594 0.000848 0.00109 0.00133 0.00154 0.00206 0.00257 0.00306 0.003570.167 0.000451 0.000771 0.000990 0.00141 0.00180 0.00218 0.00252 0.00336 0.00417 0.00495 0.005770.2 10.000596 0.00104 0.00135 0.00191 0.00245 0.00296 0.00342 0.00455 0.00565 0.00670 0.007810.3 0.00107 0.00199 0.00262 0.00375 0.00482 0.00584 0.00675 0.00901, 0.0112 0.0133 0.01550.4 0.00162 0.0031 0.0042 10.0061 0.0079 0.0095 0.0110 0.0148 0.0184 0.0218 0.02550.5 0.00226 0.00456 0.00616 0.00900 0.0117 0.0142 0.0164 0.0220 0.0274 0.0326 0.03810.6 0.00300 0.00624 0.00851 0.0125 0.0162 0.0198 0.0230 0.0309 0.0385 0.0459 0.05360.7 0.00384 0.00818 0.0113 0.0167 0.0217 0.0265 0.0307 0.0414 0.0516 0.0615 0.07190.8 0.00474 0.0104 0.0144 0.0214 0.0279 0.0341 0.0396 0.0534 0.0667 0.0795 0.09300.9 0.00571 0.0127 0.0178 0.0266 0.0347 0.0425 0.0495 0.0669 0.0836 0.100 0.1171 0.00672 0.0153 0.0215 10.0322 0.0422 0.0517 0.0603 0.0815 0.102 0.122 0.1421.25 0.00930 0.0221 0.0316 0.0478 0.0628 0.0772 0.0900 0.122 0.153 0.183 0.2141.5 0.0118 0.0293 0.0423 0.0645 0.0851 0.105 0.122 0.166 0.209 0.250 0.2932 0.0164 0.0435 0.0641 0.0990 0.131 0.162 0.190 0.259 0.326 0.391 0.4592.5 0.0200 0.0564 0.0845 0.132 0.176 0.218 0.256 0.350 0.441 0.529 0.6213 0.0227 0.0676 0.103 0.162 0.217 0.270 0.317 0.435 0.549 0.660 0.7754 0.0260 0.0853 0.134 0.214 0.288 0.360 0.424 0.586 0.741 0.892 1.0495 0.0274 0.098 0.157 0.256 0.347 0.435 0.514 0.712 0.904 1.089 1.2836 0.0279 0.108 0.177 0.291 0.397 0.499 0.592 0.823 1.046 1.262 1.4907 0.0277 0.115 0.193 0.322 0.441 0.556 0.660 0.920 1.172 1.417 1.6748 0.0271 0.121 0.206 0.348 0.479 0.605 0.720 1.008 1.286 1.556 1.8409 0.0264 0.125 0.217 0.370 0.512 0.650 0.774 1.087 1.389 1.683 1.99210 0.0254 0.128 0.226 0.389 0.540 0.687 0.820 1.155 1.479 1.792 2.12412.5 0.0224 0.128 0.235 0.415 0.582 0.744 0.892 1.264 1.625 1.975 2.34315 0.0197 0.125 0.238 0.428 0.606 0.779 0.937 1.335 1.724 2.100 2.49520 0.0158 0.115 0.233 0.435 0.625 0.812 0.983 1.416 1.839 2.248 2.68225 0.0135 0.104 0.221 0.427 0.622 0.815 0.992 1.443 1.884 2.313 2.76530 0.0122 0.0942 0.207 0.411 0.606 0.801 0.980 1.437 1.885 2.322 2.78335 0.0116 0.0853 0.193 0.392 0.584 0.777 0.955 1.410 1.858 2.295 2.75840 0.0112 0.0778 0.179 0.371 0.558 0.747 0.921 1.370 11.812 2.246 2.70345 0.0110 0.0717 0.167 0.350 0.530 0.714 0.884 1.322 1.755 2.180 2.62950 0.0109 0.0669 0.155 0.330 0.503 0.679 0.844 1.269 1.691 2.104 2.54260 0.0108 0.0602 0.137 0.293 0.450 0.612 0.763 1.157 1.550 1.935 2.34470 0.0107 0.0564 0.123 0.261 0.402 0.548 0.686 1.044 1.403 1.756 2.13180 0.0107 10.0543 10.113 0.235 10.361 0.491 0.613 10.934 1.256 1.,573 1.91190 0.0107 0.0532 0.107 0.216 0.326 0.441 0.549 0.833 11. 117 1.39 8 1.697100 0.0107 0.0524 0.103 0.202 0.300 0.402 0.497 0.746 10.995 11.240 1.50119 of 41 North Anna Power Station Units 1 and 2SesiHardndcenngRpt Seismic Hazard and Screening ReportTable 2.3.6-5:

Median amplification factors (for 5% damped PSA) developed for the NorthAnna Units 1 and 2 profile at eleven loading levels of hard rock medianpeak acceleration values from O.OIg to 1.60g using the double-corner seismological modelFrequency L ading Level ___JHzL G001 G005 G010 G020 G030 G040 G05O G075 G100 G125 G1500.1 1.006 1.025 1.032 1.037 1.039 1.041 1.042 1.044 1.045 1.046 1.0470.125 1.012 1.022 1.029 1.034 1.037 1.039 1.040 1.042 1.043 1.044 1.0440.167 1.012 1.019 1.026 1.032 1.034 1.036 1.037 1.039 1.040 1.040 1.0410.2 1.011 1.018 1.024 1.030 1.032 1.033 1.035 1.036 1.037 1.038 1.0390.3 1.011 1.023 1.023 1.026 1.028 1.029 1.030 1.032 1.033 1.034 1.0340.4 1.012 11.024 1.028 1.030 1.031 1.031 1.031 1.031 1.031 1.031 1.0310.5 1.013 1.024 1.029 1.033 1.035 1.036 1.036 1.037 1.037 1.038 1.0380.6 1.014 1.025 1.030 1.034 1.036 1.037 1.038 1.039 1.040 1.040 1.0410.7 1.015 1.026 1.031 1.035 1.037 1.038 1.039 1.040 1.041 1.041 1.0420.8 1.017 1.028 1.033 1.036 1.038 1.039 1.040 1.041 1.042 1.042 1.0430.9 1.018 1.029 1.034 1.038 1.039 1.040 1.041 1.042 1.043 1.044 1.0441 1.020 11.031 1.036 1.039 1.041 1.042 1.043 1.044 1.045 1.045 1.0451.25 1.025 1.037 1.041 1.044 1.046 1.047 1.048 1.049 1.049 1.050 1.0501.5 1.031 1.043 1.048 1.051 1.052 1.053 1.054 1.055 1.055 1.056 1.0562 1.045 1.058 1.063 1.066 1.067 1.068 1.069 1.070 1.071 1.071 1.0712.5 1.063 1.077 1.082 1.085 1.086 1.087 1.088 1.089 1.090 1.090 1.0913 1.084 1.099 1.104 1.108 1.109 1.110 1.111 1.112 1.113 1.113 1.1144 1.139 11.157 1.163 1.167 1.168 1.170 1.170 1.172 1.172 1.173 1.1745 1.211 1.233 1.240 1.244 1.246 1.247 1.248 1.250 1.251 1.252 1.2526 1.297 1.322 1.330 1.335 1.337 1.339 1.340 1.341 1.343 1.344 1.3447 1.384 1.413 1.421 1.426 1.428 1.430 1.431 1.433 1.435 1.436 1.4378 1.459 1.491 1.499 1.504 1.507 1.509 1.510 1.512 1.513 1.514 1.5159 1.514 1.548 1.556 1.561 1.563 1.565 1.566 1.568 1.570 1.570 1.57110 1.546 11.582 1.589 11.593 1.595 1.597 1.598 1.600 1.601 1.602 1.60312.5 1.545 1.580 1.583 1.585 1.586 1.587 1.588 1.589 1.590 1.591 1.59115 1.485 1.512 1.511 1.511 1.511 1.511 19.511 1.512 1.513 1.513 1.51320 1.399 1.422 1.417 1.413 1.412 1.412 1.412 1.412 1.412 1.412 1.41225 1.371 1.412 1.405 1.400 1.398 1.397 1.397 1.396 1.396 1.396 1.39630 1.356 1.428 1.422 1.417 1.415 1.415 1.414 1.414 1.414 1.415 1.41535 1.349 1.464 1.465 1.462 1.461 1.460 1.459 1.459 1.459 1.460 1.46040 1.340 1.450 1.445 1.438 1.434 1.432 1 .430 1428 1.428 1.427 1.42745 1.334 1.441 1.430 1.419 1.415 1.412 1.410 1.408 1.407 1.406 1.40650 1.331 1.444 1.436 1.424 1.419 1.416 1.414 1.411 1.409 1.408 1.40860 1.327 1.444 1.434 1.416 1.408 1.402 1.399 1.394 1.391 11.389 1.38870 1.325 1.449 1.448 1.432 1.423 1.417 1.413 1.406 1.403 1.400 1.39980 11.324 11.452 11.457 1.446 11.437 11.431 1.427 1.420 1.416 1.413 1.41290 1.322 1.450 1.460 1.449 1.441 1.434 1.429 1.420 1.415 1.411 1.409100 1.320 1.448 1.462 1.456 1.449 1.444 1.439 11.431 1.426 1.423 1.42020 of 41 North Anna Power Station Units I and 2SesiHardndcenngRpt Seismic Hazard and Screening ReportTable 2.3.6-6:

Log-SD of the amplification factors (for 5% damped PSA) developed forthe North Anna Units 1 and 2 profile at eleven loading levels of hard rockmedian peak acceleration values from O.Olg to 1.50g using the double-corner seismological modelS~tbading LeveiFreq. [Hz] i: G001 G005 G010 G020 G030 G040 G050 G075 G100 G125 G1500.1 0.00682 0.0148 0.0174 0.0191 0.0199 0.0205 0.0208 0.0214 0.0217 0.0220 0.02220.125 0.00768 0.0138 0.0165 0.0183 0.0190 0.0196 0.0198 0.0204 0.0207 0.0209 0.02110.167 0.00871 0.0124 0.0151 0.0169 0.0177 0.0182 0.0185 0.0191 0.0194 0.0196 0.01980.2 0.00855 0.0115 0.0143 0.0161 0.0169 0.0174 0.0177 0.0183 0.0186 0.0188 0.01900.3 0.008631 0.0126 0.0127 0.0144 0.0152 0.0157 0.0160 0.0166 0.0169 0.0172 0.01740.4 0.00905 0.0143 0.0148 0.0145 0.0146 0.0149 0.0151 0.0156 0.0159 0.0161 0.01630.5 0.00967 0.0147 0.0163 0.0170 0.0170 0.0170 0.0169 0.0168 0.0167 0.0167 0.01680.6 0.0105 0.0152 0.0168 0.0179 0.0183 0.0186 0.0188 0.0189 0.0190 0.0191 0.01910.7 0.0115 0.0159 0.0174 0.0184 0.0189 0.0192 0.0194 0.0197 0.0199 0.0201 0.02020.8 0.0125 0.0168 0.0182 0.0191 0.0195 0.0198 0.0200 0.0203 0.0205 0.0206 0.02070.9 0.0137 0.0179 0.0191 0.0199 0.0203 0.0205 0.0207 0.0210 0.0212 0.0213 0.02141 0.0150 0.019 0.0201 0.0209 0.0212 0.0215 0.0216 0.0219 0.0220 0.0222 0.02231.25 0.0187 0.022 0.0234 0.0239 0.0242 0.0244 0.0245 0.0247 0.0249 0.0250 0.02501.5 0.0230 0.027 0.0273 0.0278 0.0280 0.0281 0.0282 0.0284 0.0285 0.0286 0.02872 0.0333 0.037 0.0373 0.0376 0.0378 0.0379 0.0379 0.0380 0.0381 0.0382 0.03832.5 0.0462 0.050 0.0501 0.0503 0.0505 0.0505 0.0506 0.0507 0.0508 0.0508 0.05093 0.0618 0.065 0.0658 0.0660 0.0661 0.0662 0.0662 0.0663 0.0664 0.0665 0.06664 0.102 0.106 0.106 0.106 0.106 0.106 0.106 0.106 0.107 0.107 0.1075 0.150 0.154 0.154 0.154 0.154 0.154 0.154 0.154 0.154 0.154 0.1556 0.194 0.197 0.196 0.196 0.197 0.197 0.197 0.197 0.197 0.197 0.1987 0.221 0.223 0.223 0.223 0.223 0.223 0.223 0.223 0.223 0.224 0.2248 0.230 0.233 0.232 0.232 0.232 0.232 0.232 0.233 0.233 0.233 0.2339 0.226 0.231 0.230 0.230 0.230 0.231 10.231 0.231 0.231 0.231 0.23110 0.219 0.226 0.227 0.227 0.228 0.228 0.228 0.228 0.229 0.229 0.22912.5 0.198 0.223 0.227 0.230 0.231 0.232 0.232 0.233 0.233 0.234 0.23415 0.170 0.216 0.224 0.228 0.230 0.231 0.231 0.232 0.233 0.233 0.23420 0.128 0.187 0.198 0.203 0.205 0.206 0.207 0.208 0.209 0.209 0.20925 0.121 0.174 0.188 0.194 0.197 0.198 0.199 0.201 0.202 0.203 0.20330 0.122 0.156 0.171 10.178 0.181 0.183 0.184 0.185 0.186 0.187 0.18835 0.127 0.145 0.160 0.168 0.171 0.173 0.174 0.176 0.177 0.178 0.17940 0.126 0.128 0.144 0.154 0.157 0.159 0.160 0.162 0.163 0.164 0.16445 0.127 0.120 0.138 0.151 0.156 0.159 0.161 0.164 0.166 0.167 0.16850 0.127 0.115 0.128 0.142 0.147 0.151 0.153 0.156 0.158 0.160 0.16160 0.128 10.114 0.118 0.130 0.136 0.140 0.142 0.145 0.147 0.149 0.15070 0.128 0.115 0.106 10.110 10.115 0.118 0.121 0.125 0.127 0.129 0.13080 0.128 0.118 0.107 0.107 0.111 0.114 0.116 0.120 0.123 0.125 0.12690 0.128 0.121 0.111 0.107 0.109 0.110 0.112 0.116 0.118 0.120 0.121100 0.129 0.122 0.113 0.107 0.105 0.104 0.104 0.104 0.105 0.105 0.10621 of 41 North Anna Power Station Units 1 and 2Seismic Hazard and Screening ReportNAPS1&2, Single-Corner, Median Amplification Factors1.800; -1.600IL 1.4001.2000I-4 -GO1l0.0 -i -'-G 20.-600-- G040-_ -G050*0.400 G7a -G7G1000n.200 --G2I l G125SG1500.000 .......- ... .0.1 1 10 100Frequency

[Hz]Figure 2.3.6-1:

Median amplification factors (for 5% damped PSA) developed for theNorth Anna Units I and 2 profile at eleven loading levels of hard rockmedian peak acceleration values from 0.01g to 1.50g using the single-corner seismological model22 of 41 North Anna Power Station Units I and 2Seismic Hazard and Screening ReportNAPS1&2, Single-Corner, Log-SD0.250-0-GO01GOlO0.200 G020j -4G030E 0, .--G040'M 0.150 -- IG050 -O .. ...5 -G075CL G100Et 0.100 -*-G125-G 1500.000 -0.1 1 10 100Frequency

[Hz]Figure 2.3.6-2:

Log-SD of the amplification factors (for 5% damped PSA) developed forthe North Anna Units I and 2 profile at eleven loading levels of hard rockmedian peak acceleration values from O.OIg to 1.50g using the single-corner seismological model23 of 41 North Anna Power Station Units I and 2Seismic Hazard and Screening ReportNAPS1&2, Double-Corner, Median Amplification Factors1.8001.600i.1.400W 1.200CL!1.0000.800-E0.0600E0.400m 0.200-G001-*- GO05-t-G010G020-G030--0G40-G050-G0751G 100--,-- G125710.0000.1-0-G15010010Frequency

[Hz]Figure 2.3.6-3:

Median amplification factors (for 5% damped PSA) developed for theNorth Anna Units I and 2 profile at eleven loading levels of hard rockmedian peak acceleration values from 0.01g to 1.50g using the double-corner seismological model24 of 41 North Anna Power Station Units I and 2Seismic Hazard and Screening ReportNAPS1&2, Double-Corner, Log-SD0.250--s- G001G010.. 0.200IG020S --G030

!E ---G0400.150 G050-G075G100E0.100 -G125..G1500.0500.1 110 100Frequency

[Hz]Figure 2.3.6-4:

Log-SD of the amplification factors (for 5% damped PSA) developed forthe North Anna Units 1 and 2 profile at eleven loading levels of hard rockmedian peak acceleration values from 0.01g to 1.50g using the double-corner seismological model25 of 41 North Anna Power Station Units 1 and 2Seismic Hazard and Screening Report2.3.7 CONTROL POINT SEISMIC HAZARD CURVESThe procedure to develop probabilistic site-specific control point hazard curves usedin the present analysis follows the methodology described in McGuire et al.(Reference 7.15) and Section B-6.0 of the SPID. This procedure (referred to asMethod 3) computes a site-specific control point hazard curve for a broad range ofspectral accelerations given the site-specific bedrock hazard curve and site-specific estimates of soil or soft-rock response (i.e., median amplification factors) andassociated uncertainties (i.e., sigma in natural log units) presented in the previoussection.As part of the implementation of Method 3, base rock hazard curves for 31 spectralfrequencies in addition to the original seven frequencies of 100 Hz (PGA), 25 Hz, 10Hz, 5 Hz, 2.5 Hz, 1 Hz, and 0.5 Hz are initially developed and used in the application of Method 3 to capture the resulting expected site resonance characteristics from thesite response analysis.

Given the base rock hazard curves from the seven reference spectral frequencies, uniform hazard response spectra (UHRS) are developed forthis suite of 38 spectral frequencies over the range of 0.1 -100 Hz. UHRS arecomputed for annual frequencies of exceedances (AFE) of 10-3, 104, 10-, 106, 10-,and 10-8. For the interpolation of ground motions at the additional 31 spectralfrequencies, the average of the CEUS base rock single-corner and double-corner spectral shape models (Reference 7.15) is used with a magnitude 6.5 at a distanceof 50 km. This average spectral shape for each UHRS is constrained to be equal tothe ground motion value for each of the seven reference spectral frequencies.

Forfrequencies less than 0.5 Hz, a constant slope of 1/T is adopted, where T is thespectral period. This methodology for the interpolation of additional spectralfrequencies for the base rock hazard curves was applied to both the mean andfractile sets of base rock hazard curves.The resulting 38 base rock hazard curve sets (i.e., mean and five fractile levels of 5th16th, 50th, 84th, and 95th) was used in the Method 3 approach (Reference 7.15) toestimate the control point seismic hazard curves for 38 spectral frequencies alongwith the median site amplification factors and associated sigma values from thesingle-corner and double-corner seismic source input spectra.

The resulting Method3 control point hazard curves from the single-corner and double-corner siteamplification factors and sigma were combined based on equal weights asrecommended in the SPID. The mean control point hazard curves for the sevenreference spectral frequencies for the North Anna site are shown in Figure 2.3.7-1.Tabulated values of the site response amplification functions and control pointhazard curves are provided in the attached Appendix A.26 of 41 North Anna Power Station Units I and 2Seismic Hazard and Screening ReportApproach 3 Results:

Dominion North Anna Units 1&2, Mean1.0E-031.0E-041.0E-051.OE-061.0E-070.010.1PSA (g)10Figure 2.3.7-1:

Control point mean hazard curves for spectral frequencies of 0.5, 1, 2.5, 5,10, 25 and 100 Hz at the North Anna site27 of 41 North Anna Power Station Units I and 2Seismic Hazard and Screening Report2.4 CONTROL POINT RESPONSE SPECTRAThe control point hazard curves described above have been used to develop uniformhazard response spectra (UHRS) and the ground motion response spectrum(GMRS). The UHRS were obtained through linear interpolation in log-log space toestimate the spectral acceleration at each of the 38 oscillator frequencies for the 1 E-4 and 1 E-5 per year hazard levels.The 1E-4 and 1E-5 UHRS, along with a design factor (DF) are used to compute theGMRS at the control point using the criteria in Regulatory Guide 1.208. Table 2.4-1shows the UHRS and GMRS spectral accelerations and these spectra are alsoplotted in Figure 2.4-1.28 of 41 North Anna Power Station Units I and 2Seismic Hazard and Screening ReportTable 2.4-1: Horizontal Direction, 5% Damped UHRS for 104 and 10-5 and GMRS atcontrol point for North AnnaFrequency Mean UHRS (g) Mean UHRS (g) GMRS(Hz) (AEP=10)

(AEP=105) (g)y ..100.000 0.3787 1.2012 0.572190.000 0.4070 1.2910 0.614980.000 0.4596 1.4635 0.696570.000 0.5361 1.7090 0.813260.000 0.6306 2.0198 0.960150.000 0.7286 2.3472 1.114545.000 0.7607 2.4549 1.165240.000 0.7935 2.5609 1.215535.000 0.8203 2.6608 1.261730.000 0.7941 2.5790 1.222625.000 0.7710 2.5088 1.188920.000 0.7625 2.4579 1.167015.000 0.7707 2.4613 1.170712.500 0.7632 2.4193 1.152510.000 0.7017 2.2012 1.05089.000 0.6430 2.0154 0.96228.000 0.5727 1.7928 0.85627.000 0.4927 1.5373 0.73466.000 0.4089 1.2684 0.60685.000 0.3285 1.0116 0.48474.000 0.2509 0.7727 0.37023.000 0.1802 0.5570 0.26672.500 0.1454 0.4513 0.21592.000 0.1196 0.3697 0.17701.500 0.0893 0.2749 0.13171.250 0.0723 0.2223 0.10651.000 0.0549 0.1681 0.08060.900 0.0517 0.1545 0.07450.800 0.0479 0.1397 0.06770.700 0.0435 0.1237 0.06020.600 0.0384 0.1067 0.05220.500 0.0326 0.0884 0.04350.400 0.0260 0.0705 0.03470.300 0.0195 0.0529 0.02600.200 0.0131 0.0354 0.01740.167 0.0109 0.0296 0.01450.125 0.0082 0.0221 0.01090.100 0.0066 0.0177 0.0087AEP -annual exceedance probability 29 of 41 North Anna Power Station Units I and 2Seismic Hazard and Screening ReportNorth Anna Units 1 and 2 UHRS and GMRSHorizontal Direction, 5% Damping3.002.50 ----GMRS2.00 -UHRS 1E-4/.2 UHRS 1E-51.501.00 --_ _ _0.50 OZ0.000 10 100Frequency (Hz)Figure 2.4-1: North Anna Units 1 and 2 UHRS for IE-4 and IE-5 and GMRS at ControlPoint30 of 41 North Anna Power Station Units I and 2Seismic Hazard and Screening ReportNorth Anna Power Station Units I and 2 Seismic Hazard and Screening Report3.0DESIGN BASIS EARTHQUAKE The design basis for North Anna Units 1 and 2 is identified in the-Updated FinalSafely Analysis Report (UFSAR) (Reference 7.4).DESCRIPTION OF SSE SPECTRAL SHAPE3.1The North Anna UFSAR describes the development of the SSE in Section 2.5.2.6.For the purpose of establishing a design basis earthquake, it was assumed that anearthquake equal to the largest shock associated with the Arconia Syncline mightoccur close to the site area. With the epicenter of a shock similar to the 1875intensity-VII Arconia earthquake shifted to the vicinity of the site, it was estimated that the maximum horizontal ground acceleration at the rock surface would be lessthan 0.12g. Accordingly, the design-basis earthquake for structures founded on rockwas taken at 0.12g for horizontal ground motion and two-thirds that value for verticalground motion.UFSAR Figure 2.5-12 shows the rock SSE response spectrum.

The SSE responsespectrum data provided in Table 3.1-1 are based on UFSAR Figure 2.5-12. The SSEresponse spectrum is plotted in Figure 3.1-1.Table 3.1-1: SSE (Rock) Horizontal Direction North AnnaResponse Spectrum at 5% Damping forFrequency

[Hz] Acceleration.[g]

Frequency

[Hz] Acceleration

[g]0.125 0.003 2.000 0.3330.173 0.005 10.000 0.3330.201 0.007 10.640 0.3180.252 0.011 11.184 0.3070.307 0.017 11.467 0.3010.357 0.023 12.054 0.2910.415 0.030 13.000 0.2750.470 0.036 15.090 0.2460.532 0.044 18.425 0.2120.603 0.053 20.359 0.1970.700 0.067 22.496 0.1830.800 0.082 25.486 0.1670.900 0.098 28.162 0.1551.000 0.116 30.352 0.1471.183 0.149 35.255 0.1321.308 0.174 38.000 0.1251.500 0.214 40.000 0.1201.720 0.265 50.000 0.1201.901 0.30931 of 41 North Anna Power Station Units I and 2Seismic Hazard and Screening ReportNot nn oerSaio ntsIad2 esicHzrdadScenngRpr North Anna Unit 1 and 2 Safe Shutdown Earthquake (SSE)Horizontal Direction, 5% Damping0.350.300.250.200.150.100.050.000 1 10 100Frequency (Hz)Figure 3.1-1: North Anna Units I and 2 Safe Shutdown Earthquake (Rock) ResponseSpectrum

-Horizontal Direction, 5% Damping3.2 CONTROL POINT ELEVATION EPRI Report 1025287 (SPID) provides very specific guidelines on how a nuclearpower facility is to identify the SSE Control Point elevation for a plant if this controlpoint was not identified in the UFSAR. In the case of a plant designated as a rocksite, or where the key safety-related structures are rock-founded (as is the case forNorth Anna), the SSE control point is defined as the foundation bearing elevation ofthe highest rock-supported, safety-related structure.

At North Anna, the highestrock-founded, safety-related structure is the Casing Cooling Tank and Pumphouse structure.

This is a single slab-supported structure founded above weathered bedrock and on concrete backfill.

The concrete backfill was placed to create a levelbearing surface above the varying elevation of the exposed bedrock surface.

Due toits limited horizontal extent, the concrete backfill is not included in the GMRScalculation.

The base of the Casing Cooling Tank and Pumphouse foundation is at El. 268 ft.The GMRS was calculated at El. 268 ft, or 3 ft below plant grade.32 of 41 North Anna Power Station Units I and 2Seismic Hazard and Screening Report4.0 SCREENING EVALUATION In accordance with SPID Section 3, a screening evaluation was performed asdescribed below.4.1 RISK EVALUATION SCREENING (1 TO 10 Hz)The GMRS exceeds the SSE in the 1 to 10 Hz range. Therefore, North Annascreens in for a risk evaluation.

4.2 HIGH FREQUENCY SCREENING

(> 10 Hz)For the range above 10 Hz, the GMRS exceeds the SSE. Therefore, North Annascreens in for a high frequency confirmation.

The high frequency confirmation will beaddressed together with the risk evaluation discussed in Section 4.1 above.4.3 SPENT FUEL POOL EVALUATION SCREENING (1 TO 10 Hz)In the 1 to 10 Hz part of the response

spectrum, the GMRS exceeds the SSE.Therefore, North Anna screens in for a Spent Fuel Pool evaluation.

33 of 41 North Anna Power Station Units I and 2Seismic Hazard and Screening Report5.0 INTERIM ACTIONS AND ASSESSMENTS Consistent with NRC letter dated February 20, 2014 (Reference 7.24), the seismichazard reevaluations presented herein are distinct from the current design andlicensing bases for North Anna Units 1 and 2. Therefore, the results do not call intoquestion the operability or functionality of plant structures, systems and components (SSCs) and are not reportable pursuant to 10 CFR 50.72, "Immediate notification requirements for operating nuclear power reactors,"

and 10 CFR 50.73, "Licensee event report system."The NRC 50.54(f) letter (Reference 7.1) requests that licensees provide "interimevaluation and actions taken or planned to address the higher seismic hazard relative tothe design basis, as appropriate, prior to completion of the risk evaluation."

Theseevaluations and actions are discussed below.5.1 EXPEDITED SEISMIC EVALUATION PROCESSThe Expedited Seismic Evaluation Process (ESEP) is being performed for NorthAnna Units 1 and 2 in accordance with the methodology in EPRI 3002000704 (Reference 7.3) as proposed in Nuclear Energy Institute (NEI) letter to NRC datedApril 9, 2013 (Reference 7.22) and confirmed in NRC letter dated May 7, 2013(Reference 7.23).To support an interim evaluation of the North Anna Units 1 and 2 GMRS, an initialexpedited seismic equipment list (ESEL) has been developed for North Anna inaccordance with EPRI 3002000704.

Estimates of in-structure response spectra(ISRS) corresponding to the GMRS have been made in the 1 to 10 Hz range. Usingthe GMRS-based ISRS in the 1 to 10 Hz range and 2-times-SSE-based ISRS above10 Hz, seismic capacity calculations have been performed for ESEL components, and for block walls in the vicinity of the ESEL components.

Plant walkdowns havebeen performed for selected components where previous Unresolved Safety Issue(USI) A-46 or Individual Plant Examination of External Events (IPEEE) walkdowninformation was not available.

The evaluated SSCs have been determined to havesufficient capacities to withstand the above stated seismic spectra.Dominion plans to submit the ESEP results, consistent with EPRI 3002000704

guidance, to NRC by December 31, 2014 in accordance with the schedule in theReference 7.22 letter to NRC.5.2 NORTH ANNA UNITS 1 AND 2 RISK ESTIMATES NEI letter dated March 12, 2014 (Reference 7.16) provides seismic core damage riskestimates using the same approach as used in Reference 7.17 with the updatedseismic hazards for the operating nuclear plants in the Central and Eastern UnitedStates, including North Anna. Dominion's estimates of the seismic core damagefrequency (CDF) are consistent with the conclusions in Reference 7.16, i.e., the34 of 41 North Anna Power Station Units I and 2Seismic Hazard and Screening Reportweighted (average of four frequencies) seismic CDF using the methods in Reference 7.17 for North Anna is less than 1E-4 per year. These risk estimates continue tosupport the following conclusions of the NRC GI-199 Safety/Risk Assessment:

Overall seismic core damage risk estimates are consistent with theCommission's Safety Goal Policy Statement because they are within thesubsidiary objective of 1-4/year for core damage frequency.

The GI-199Safety/Risk Assessment, based in part on information from the U.S. NuclearRegulatory Commission's (NRC's) Individual Plant Examination of ExternalEvents (IPEEE) program, indicates that no concern exists regarding adequateprotection and that the current seismic design of operating reactors provides asafety margin to withstand potential earthquakes exceeding the original designbasis.5.3 PREVIOus EVALUATIONS

-INCLUDING BEYOND DESIGN BASIS SEISMIC INPUTS5.3.1 IPEEE AND USI A-46 EFFORTSNorth Anna Units 1 and 2 conducted an IPEEE Evaluation using the EPRI SeismicMargin Assessment method to a NUREG-CR/0098 median spectral shape anchoredto 0.3g PGA. This PGA level is 2.5 times the PGA of the North Anna SSE for rockfounded structures.

The vast majority of components were shown to have marginabove a high confidence of low probability of failure (HCLPF) capacity of 0.3g. TheIPEEE HCLPF Spectrum (IHS), with the NUREG/CR-0098 shape, was anchored atthe capacity of the weakest component (the Emergency Condensate Storage Tank(ECST)) in the IPEEE seismic margin analysis.

However, the ECST has since beenshown to have greater seismic capacity based upon a recent detailed review. Thelowest capacity component now becomes the Refueling Water Storage Tank(RWST) with a HCLPF capacity of 0.18g. Therefore, the IHS can be anchored at0.18g. The IHS, and its comparison with the SSE, is shown in Figure 5.3-1.The IPEEE program was run concurrently with the USI A-46 program for North Annaand resulted in comprehensive walkdowns of safe-shutdown equipment, detailedrelay evaluations, and analyses of tanks, cable trays and conduit systems.

As aresult of these evaluations, several plant enhancements were made at North Anna,as identified in the IPEEE Summary Report (Reference 7.18).35 of 41 North Anna Power Station Units I and 2Seismic Hazard and Screening ReportNorth Anna Unit 1 and 2 IHS Comparison to SSEHorizontal Direction, 5% Damping0.450.400.350.302 0.250.204 0.18g0.12g0.100.20.050.000 1 10 100Frequency (Hz)-IHS (Scaled to HCLPF) -SSE (Rock)Figure 5.3-1: North Anna Units I and 2 IHS Comparison to SSE5.3.2 WALKDOWNS TO ADDRESS NTTF RECOMMENDATION 2.3: SEISMICNorth Anna recently performed walkdowns for NTTF 2.3 and submitted a summaryreport to NRC (Reference 7.19). There were no significant findings as they relate tothe confirmation that North Anna meets the seismic design basis. The IPEEEcommitments were met, as stated in the NTTF 2.3 walkdown report.5.3.3 ACTIONS FOLLOWING M5.8 MINERAL EARTHQUAKE OF AUGUST 23, 2011The Mineral, Virginia M5.8 earthquake of August 23, 2011 exceeded the plant SSEspectra.

In the weeks following the Mineral event and as part of long-term commitments, North Anna performed a comprehensive assessment of the entireplant and performed functional and surveillance testing.

No damage was observedfor safety-related SSCs.North Anna completed several long-term evaluations and implemented actionsrequested in an NRC Confirmatory Action Letter (Reference 7.20) related to theevaluation of the effects of the Mineral earthquake.

A summary of these completed actions was provided to the NRC in a Dominion letter dated May 13, 2013(Reference 7.21). Some of the significant evaluations and actions completed are:36 of 41 North Anna Power Station Units 1 and 2Seismic Hazard and Screening Report" Comprehensive Walkdowns:

SSCs were walked down immediately following theMineral earthquake event by Dominion engineers and several industry experts.No damage to safety-related SSCs was observed.

" Evaluation of Equipment, ASME Class 1 Piping, and Structures:

A detailedsampling evaluation of these SSCs per the guidelines of EPRI NP-6695(Reference 7.25) and NRC RG 1.167 (Reference 7.26) was performed.

In-structure response spectra developed from dynamic analyses with the Mineralearthquake recorded time-histories were used. These evaluations corroborated the results of extensive plant inspections and functional tests that wereperformed in support of the plant restart effort where no physical or functional damage was observed in safety-related structures, systems and components.

" Evaluation of components with HCLPF capacities less than 0.3q: Thirteen groupsof components, identified during IPEEE to have HCLPF capacities below 0.3g,were re-evaluated.

This review indicated that, in some cases, there wassignificant conservatism in the previous calculations; therefore, more realistic analyses were performed.

Four groups of SSCs were shown to have a HCLPFcapacity greater than 0.3g for the review level earthquake (RLE). Thecomponents with HCLPF capacity below 0.3g were also thoroughly inspected using the USI A-46 seismic walkdown guidance and no damage was observed.

• Implementation of a Seismic Margin Managqement Program:

North Annaimplemented a seismic margin management program (SMMP) to address theimpact of the M5.8 August 23, 2011 earthquake.

To ensure that adequateseismic margins are maintained for plant SSCs, Dominion revised the designcontrol process for North Anna Units 1 and 2 to require explicit evaluation of plantmodifications including seismic qualification of new and replacement equipment for the effects of the August 23, 2011 earthquake using ISRS based on theMineral earthquake event for the Containment, Auxiliary

Building, and otherbuildings containing safety related SSCs. These ISRS were developed viadynamic analyses using the actual time-histories recorded during the Mineralearthquake.

37 of 41 North Anna Power Station Units I and 2Seismic Hazard and Screening Report

6.0 CONCLUSION

S In accordance with the NRC 10 CFR 50.54(f) request for information letter(Reference 7.1), a seismic hazard and screening evaluation was performed for NorthAnna Units 1 and 2. A GMRS was developed solely for purpose of screening foradditional evaluations in accordance with the SPID.Based on the results of the screening evaluation, North Anna Units 1 and 2 screen-in for a risk evaluation, a Spent Fuel Pool evaluation, and a high frequency confirmation.

A seismic probabilistic risk assessment (SPRA) will be performed forNorth Anna in accordance with the guidance in EPRI Report 1025287 (SPID).38 of 41 North Anna Power Station Units I and 2Seismic Hazard and Screening Report

7.0 REFERENCES

7.1 U. S. Nuclear Regulatory Commission (NRC) letter, "Request for Information Pursuant to Title 10 of the Code of Federal Regulations 50.54(f)

Regarding Recommendations 2.1, 2.3 and 9.3 of the Near-Term Task Force Review of Insightsfrom the Fukushima Dai-lchi Accident,"

dated March 12, 2012.7.2 Electric Power Research Institute (EPRI) Report No. 1025287, "Seismic Evaluation

Guidance, Screening, Prioritization and Implementation Details (SPID) for theResolution of Fukushima Near-Term Task Force Recommendation 2.1: Seismic,"

February 28, 2013.7.3 EPRI Report No. 3002000704, "Seismic Evaluation Guidance:

Augmented Approachfor the Resolution of Fukushima Near-Term Task Force Recommendation 2.1 -Seismic,"

May 31, 2013.7.4 North Anna Power Station Units 1 and 2 Updated Final Safety Analysis Report,Revision 49.7.5 Lettis Consultants International Report, "North Anna Seismic Hazard and Screening Report,"

Rev. 1, LCI Project 1041, October 29, 2013.7.6 EPRI Letter RSM-101113-018, "North Anna Rock Seismic Hazard and Screening Report (Revision 1)," to Dominion transmitting the results of EPRI Supplemental Project "Seismic Attenuation and GMRS Project,"

CF 18139-30157 (Project ID No.073272).7.7 Technical Report, "Central and Eastern United States Seismic SourceCharacterization for Nuclear Facilities,"

U.S. Nuclear Regulatory Commission Report,NUREG-2115; EPRI Report 1021097, DOE Report# DOE/NE-0140, 2012.7.8 EPRI Report No. 3002000717, "EPRI (2004, 2006) Ground-Motion Model (GMM)Review Project,"

June 13, 2013.7.9 NRC Regulatory Guide 1.208, "A Performance-Based Approach to Define the Site-Specific Earthquake Ground Motion,"

March 2007.7.10 Bechtel Power Corporation Study No. 25784-000-30R-KO0G-00001, Revision 1,"Subsurface Material Properties, Base Case Velocity

Profiles, Amplification Functions and Resulting Surface Hazard Curves, GMRS and Comparison to SSE,"February 24, 2014.7.11 North Anna Early Site Permit Application, Revision 9, 2006; North Anna CombinedLicense Application, Revision 7, December 2013 Updated by Submission 14/15.7.12 EPRI TR-1 02293, "Guidelines for Determining Design Basis Ground Motions,"

Vol. 1-5,1993.7.13 Sun, J.I., Golesorkhi, R., and Seed, H.B. "Dynamic Moduli and Damping Ratios forCohesive Soils," Earthquake Engineering Research Center, University of California

-Berkeley, California, Report No. EERC-88/15, 1988.39 of 41 North Anna Power Station Units I and 2Seismic Hazard and Screening Report7.14 Toro, G.R. "Probabilistic Models of Site Velocity Profiles for Generic and Site-Specific Ground Motion Amplification Studies,"

1996. Published as an appendix inSilva, W.J., N. Abrahamson, G. Toro and C. Costantino.

"Description and validation of the stochastic ground motion model," Report Submitted to Brookhaven NationalLaboratory, Associated Universities, Inc. Upton, New York 11973, Contract No.770573, 1996.7.15 McGuire, R.K., W. J. Silva, and C.J. Costantino.

"Technical Basis for Revision ofRegulatory Guidance on Design Ground Motions, Hazard and Risk Consistent Ground Motion Spectra Guidelines,"

U.S. Nuclear Regulatory Commission, NUREG/CR-6728, November 2001.7.16 Anthony R. Pietrangelo, NEI letter to Eric J. Leeds, NRC, "Seismic Risk Evaluations for Plants in the Central and Eastern United States,"

dated March 12, 2014.7.17 NRC Information Notice 2010-18,

'Generic Issue (GI) 199, "Implications of UpdatedProbabilistic Seismic Hazard Estimates in Central and Eastern United States onExisting Plants,"'

and NRC Memorandum from Patrick Hiland to Brian Sheron,"Safety/Risk Assessment Results for GI-1 99," September 2, 2010.7.18 Virginia Electric and Power Company Letter to U. S. NRC Document Control Desk,"North Anna Power Station, Units 1 and 2, Summary Report for Individual PlantExamination of External Events (IPEEE) -Seismic",

Serial No.97-303 dated May 27,1997.7.19 Virginia Electric and Power Company Letter to U. S. NRC Document Control Desk,"North Anna Power Station Units 1 and 2, Report in Response to March 12, 2012Information Request Regarding Seismic Aspects of Recommendation 2.3," SerialNo.14-017 dated January 30, 2014.7.20 Eric J. Leeds, NRC letter to David A. Heacock, Virginia Electric and PowerCompany, "Confirmatory Action Letter Regarding North Anna Power Station UnitNos. 1 and 2, Long-Term Commitments to Address Exceeding Design BasesSeismic Event (TAC Nos. ME7254 and ME7255),"

CAL No. NRR-2011-002 datedNovember 11,2011.7.21 Virginia Electric and Power Company Letter to U. S. NRC Document Control Desk,"North Anna Power Station Units 1 and 2, Confirmatory Action Letter, Notification ofCommitment Action Completion,"

Serial No.13-143 dated May 13, 2013.7.22 Anthony R. Pietrangelo, NEI letter to David L. Skeen, NRC, "Proposed Path Forwardfor NTTF Recommendation 2.1: Seismic Reevaluations,"

dated April 9, 2013.7.23 Eric J. Leeds, NRC letter to Joseph E. Pollock, NEI, "Electric Power ResearchInstitute Final Draft Report XXXXXX, "Seismic Evaluation Guidance:

Augmented Approach for the Resolution of Fukushima Near-Term Task Force Recommendation 2.1: Seismic,"

as an Acceptable Alternative to the March 12, 2012, Information Request for Seismic Reevaluations,"

dated May 7, 2013.40 of 41 North Anna Power Station Units 1 and 2Seismic Hazard and Screening Report7.24 Eric J. Leeds, NRC letter, "Supplemental Information Related to Request for Information Pursuant to Title 10 of the Code of Federal Regulations 50.54(F)

Regarding SeismicHazard Reevaluations for Recommendation 2.1 of the Near-Term Task Force Review ofInsights from the Fukushima Dai-ichi Accident,"

dated February 20, 2014.7.25 EPRI Report NP-6041-SL, "A Methodology for Assessment of Nuclear Plant SeismicMargin(Revision 1)," August 1991.7.26 NRC Regulatory Guide 1.167, "Restart of a Nuclear Plant Shutdown by a SeismicEvent," March 1997.7.27 Lettis Consultants International Report, "Baseline Hard Rock PSHA Calculation andDeaggregation using the CEUS SSC for North Anna" , LCI Project 1041, November14, 2013.41 of 41 North Anna Power Station Units 1 and 2Seismic Hazard and Screening ReportAppendix AContentsTable A-ia. Mean and Fractile Seismic Hazard Curves for PGA at North AnnaTable A-i b. Mean and Fractile Seismic Hazard Curves for 0.5 Hz at North AnnaTable A-1 c. Mean and Fractile Seismic Hazard Curves for 1 Hz at North AnnaTable A-ild. Mean and Fractile Seismic Hazard Curves for 2.5 Hz at North AnnaTable A-ie. Mean and Fractile Seismic Hazard Curves for 5 Hz at North AnnaTable A-If. Mean and Fractile Seismic Hazard Curves for 10 Hz at North AnnaTable A-ig. Mean and Fractile Seismic Hazard Curves for 25 Hz at North AnnaTable A-2a. Computed median and logarithmic standard deviation of the siteamplification for North Anna -single corner modelTable A-2b. Computed median and logarithmic standard deviation of the siteamplification for North Anna -double corner modelA-i North Anna Power Station Units 1 and 2Seismic Hazard and Screening ReportAppendix ATable A-la: PGA Seismic Hazard Curves at North AnnaMean 5"' Fractile 16"n Fractile 50" Fractile 84"n Fractile 95t" FractilePGA AEP PGA AEP PGA AEP PGA AEP PGA AEP PGA AEP(g) (g) (g) (g) (g) (g)0.0504 1.068E-03 0.0217 1.074E-03 0.0264 1.071E-03 0.0408 1.068E-03 0.0756 1.070E-03 0.1162 1.073E-03 0.0530 1.068E-03 0.0228 1.072E-03 0.0277 1.070E-03 0.0428 1.068E-03 0.0793 1.070E-03 0.1216 1.073E-03 0.0558 1.067E-03 0.0239 1.069E-03 0.0292 1.068E-03 0.0450 1.067E-03 0.0831 1.069E-03 0.1273 1.073E-03 0.0586 1.065E-03 0.0252 1.063E-03 0.0307 1.062E-03 0.0473 1.063E-03 0.0871 1.068E-03 0.1333 1.072E-03 0.0617 1.059E-03 0.0265 1.049E-03 0.0322 1.051E-03 0.0497 1.057E-03 0.0913 1.064E-03 0.1395 1.069E-03 0.0648 1.047E-03 0.0278 1.026E-03 0.0339 1.032E-03 0.0523 1.043E-03 0.0957 1.056E-03 0.1460 1.062E-03 0.0682 1.026E-03 0.0292 9.929E-04 0.0357 1.002E-03 0.0549 1.021E-03 0.1003 1.040E-03 0.1528 1.048E-03 0.0717 9.955E-04 0.0307 9.494E-04 0.0375 9.620E-04 0.0577 9.885E-04 0.1051 1.015E-03 0.1600 1.025E-03 0.0754 9.545E-04 0.0323 8.989E-04 0.0394 9.145E-04 0.0607 9.473E-04 0.1102 9.798E-04 0.1675 9.909E-04 0.0793 9.061E-04 0.0340 8.447E-04 0.0415 8.625E-04 0.0638 8.995E-04 0.1155 9.353E-04 0.1753 9.463E-04 0.0834 8.534E-04 0.0357 7.898E-04 0.0436 8.093E-04 0.0670 8.484E-04 0.1210 8.845E-04 0.1835 8.939E-04 0.0877 7.998E-04 0.0375 7.365E-04 0.0458 7.571E-04 0.0705 7.966E-04 0.1269 8.305E-04 0.1921 8.373E-04 0.0922 7.474E-04 0.0395 6.859E-04 0.0482 7.072E-04 0.0741 7.459E-04 0.1330 7.762E-04 0.2011 7.798E-04 0.0969 6.975E-04 0.0415 6.384E-04 0.0507 6.602E-04 0.0778 6.974E-04 0.1394 7.237E-04 0.2105 7.240E-04 0.1019 6.505E-04 0.0436 5.940E-04 0.0533 6.161E-04 0.0818 6.514E-04 0.1461 6.739E-04 0.2203 6.713E-04 0.1072 6.066E-04 0.0459 5.527E-04 0.0560 5.750E-04 0.0860 6.081E-04 0.1531 6.270E-04 0.2306 6.219E-04 0.1127 5.656E-04 0.0482 5.143E-04 0.0589 5.366E-04 0.0904 5.674E-04 0.1605 5.832E-04 0.2414 5.760E-04 0.1186 5.274E-04 0.0507 4.785E-04 0.0620 5.007E-04 0.0950 5.293E-04 0.1682 5.423E-04 0.2527 5.335E-04 0.1247 4.917E-04 0.0533 4.452E-04 0.0652 4.672E-04 0.0998 4.937E-04 0.1763 5.042E-04 0.2645 4.941E-04 0.1311 4.584E-04 0.0560 4.143E-04 0.0685 4.358E-04 0.1049 4.604E-04 0.1848 4.688E-04 0.2768 4.575E-04 0.1379 4.273E-04 0.0589 3.854E-04 0.0720 4.064E-04 0.1103 4.294E-04 0.1937 4.358E-04 0.2898 4.237E-04 0.1450 3.982E-04 0.0619 3.586E-04 0.0758 3.788E-04 0.1159 4.005E-04 0.2031 4.052E-04 0.3033 3.923E-04 0.1524 3.710E-04 0.0651 3.336E-04 0.0797 3.528E-04 0.1218 3.735E-04 0.2128 3.767E-04 0.3175 3.633E-04 0.1603 3.456E-04 0.0684 3.103E-04 0.0838 3.285E-04 0.1280 3.483E-04 0.2231 3.502E-04 0.3324 3.364E-04 0.1686 3.219E-04 0.0719 2.885E-04 0.0881 3.056E-04 0.1345 3.248E-04 0.2338 3.256E-04 0.3479 3.114E-04 0.1773 2.997E-04 0.0756 2.681E-04 0.0926 2.843E-04 0.1414 3.028E-04 0.2451 3.027E-04 0.3642 2.884E-04 0.1864 2.791E-04 0.0795 2.489E-04 0.0974 2.645E-04 0.1486 2.822E-04 0.2569 2.814E-04 0.3812 2.670E-04 0.1960 2.599E-04 0.0836 2.311E-04 0.1024 2.459E-04 0.1562 2.630E-04 0.2693 2.616E-04 0.3990 2.472E-04 0.2061 2.420E-04 0.0879 2.143E-04 0.1077 2.287E-04 0.1642 2.450E-04 0.2822 2.432E-04 0.4177 2.289E-04 0.2168 2.253E-04 0.0924 1.988E-04 0.1132 2.127E-04 0.1725 2.282E-04 0.2958 2.260E-04 0.4372 2.119E-04 0.2280 2.098E-04 0.0971 1.843E-04 0.1191 1.977E-04 0.1813 2.126E-04 0.3101 2.101E-04 0.4576 1.962E-04 0.2397 1.953E-04 0.1021 1.709E-04 0.1252 1.839E-04 0.1906 1.980E-04 0.3250 1.952E-04 0.4790 1.816E-04 0.2521 1.819E-04 0.1073 1.584E-04 0.1317 1.709E-04 0.2003 1.844E-04 0.3407 1.815E-04 0.5014 1.681E-04 0.2651 1.693E-04 0.1128 1.468E-04 0.1384 1.589E-04 0.2105 1.717E-04 0.3571 1.686E-04 0.5249 1.556E-04 0.2788 1.577E-04 0.1186 1.361E-04 0.1456 1.477E-04 0.2213 1.600E-04 0.3743 1.567E-04 0.5494 1.441E-04 0.2931 1.467E-04 0.1247 1.261E-04 0.1531 1.372E-04 0.2326 1.490E-04 0.3923 1.456E-04 0.5751 1.333E-04 0.3082 1.366E-04 0.1311 1.167E-04 0.1610 1.274E-04 0.2444 1.387E-04 0.4112 1.353E-04 0.6020 1.232E-04 0.3241 1.270E-04 0.1378 1.079E-04 0.1692 1.181E-04 0.2569 1.291E-04 0.4310 1.256E-04 0.6302 1.137E-04 A-1 North Anna Power Station Units I and 2Seismic Hazard and Screening ReportAppendix ATable A-la: PGA Seismic Hazard Curves at North AnnaMean 5"n Fractile 16tn Fractile 50"' Fractile 84t" Fractile 95'" FractilePGA AEP PGA AEP PGA AEP PGA AEP PGA AEP PGA AEP(g) (g) (g) (_) (g) (g)0.3409 1.180E-04 0.1449 9.954E-05 0.1780 1.094E-04 0.2700 1.200E-04 0.4518 1.164E-04 0.6596 1.046E-04 0.3584 1.093E-04 0.1523 9.161 E-05 0.1871 1.011 E-04 0.2838 1.114E-04 0.4735 1.076E-04 0.6905 9.587E-05 0.3769 1.008E-04 0.1601 8.413E-05 0.1968 9.310E-05 0.2983 1.030E-04 0.4963 9.905E-05 0.7227 8.753E-05 0.3964 9.2525-05 0.1684 7.713E-05 0.2069 8.553E-05 0.3135 9.483E-05 0.5202 9.076E-05 0.7565 7.962E-05 0.4168 8.446E-05 0.1770 7.063E-05 0.2176 7.840E-05 0.3295 8.693E-05 0.5453 8.280E-05 0.7919 7.223E-05 0.4383 7.678E-05 0.1861 6.464E-05 0.2288 7.176E-05 0.3463 7.938E-05 0.5715 7.526E-05 0.8289 6.541E-05 0.4609 6.959E-05 0.1956 5.914E-05 0.2406 6.563E-05 0.3639 7.228E-05 0.5991 6.825E-05 0.8677 5.918E-05 0.4847 6.298E-05 0.2056 5.41 OE-05 0.2530 5.999E-05 0.3825 6.572E-05 0.6279 6.180E-05 0.9083 5.353E-05 0.5097 5.696E-05 0.2162 4.949E-05 0.2660 5.483E-05 0.4020 5.971E-05 0.6581 5.594E-05 0.9507 4.840E-05 0.5360 5.150E-05 0.2273 4.527E-05 0.2797 5.011 E-05 0.4225 5.423E-05 0.6898 5.061 E-05 0.9952 4.376E-05 0.5636 4.656E-05 0.2389 4.142E-05 0.2941 4.579E-05 0.4441 4.924E-05 0.7231 4.579E-05 1.0417 3.958E-05 0.5927 4.210E-05 0.2512 3.789E-05 0.3093 4.183E-05 0.4667 4.471E-05 0.7579 4.143E-05 1.0904 3.579E-05 0.6233 3.806E-05 0.2641 3.466E-05 0.3252 3.822E-05 0.4905 4.060E-05 0.7944 3.748E-05 1.1414 3.236E-05 0.6554 3.440E-05 0.2776 3.170E-05 0.3420 3.492E-05 0.5156 3.687E-05 0.8327 3.391E-05 1.1948 2.926E-05 0.6892 3.11OE-05 0.2919 2.899E-05 0.3596 3.191E-05 0.5419 3.347E-05 0.8728 3.068E-05 1.2506 2.646E-05 0.7248 2.812E-05 0.3068 2.652E-05 0.3781 2.915E-05 0.5695 3.039E-05 0.9148 2.776E-05 1.3091 2.393E-05 0.7622 2.542E-05 0.3226 2.425E-05 0.3976 2.664E-05 0.5986 2.760E-05 0.9588 2.512E-05 1.3703 2.164E-05 0.8015 2.298E-05 0.3391 2.217E-05 0.4181 2.434E-05 0.6291 2.506E-05 1.0050 2.273E-05 1.4344 1.957E-05 0.8428 2.078E-05 0.3565 2.027E-05 0.4396 2.223E-05 0.6612 2.275E-05 1.0534 2.056E-05 1.5014 1.770E-05 0.8863 1.879E-05 0.3748 1.854E-05 0.4623 2.031E-05 0.6949 2.066E-05 1.1042 1.861E-05 1.5716 1.600E-05 0.9320 1.698E-05 0.3940 1.696E-05 0.4861 1.856E-05 0.7304 1.876E-05 1.1573 1.683E-05 1.6451 1.446E-05 0.9801 1.535E-05 0.4142 1.550E-05 0.5112 1.695E-05 0.7676 1.703E-05 1.2131 1.523E-05 1.7220 1.306E-05 1.0306 1.387E-05 0.4355 1.417E-05 0.5375 1.548E-05 0.8068 1.546E-05 1.2715 1.376E-05 1.8026 1.177E-05 1.0838 1.250E-05 0.4578 1.294E-05 0.5652 1.414E-05 0.8480 1.403E-05 1.3327 1.242E-05 1.8868 1.058E-05 1.1397 1.124E-05 0.4813 1.179E-05 0.5943 1.289E-05 0.8912 1.271E-05 1.3969 1.117E-05 1.9751 9.473E-06 1.1985 1.005E-05 0.5059 1.070E-05 0.6249 1.173E-05 0.9367 1.148E-05 1.4642 1.001E-05 2.0674 8.450E-06 1.2603 8.941E-06 0.5319 9.659E-06 0.6571 1.062E-05 0.9845 1.032E-05 1.5347 8.916E-06 2.1641 7.511E-06 1.3253 7.904E-06 0.5592 8.664E-06 0.6910 9.555E-06 1.0347 9.219E-06 1.6086 7.902E-06 2.2652 6.658E-06 1.3937 6.953E-06 0.5879 7.726E-06 0.7266 8.533E-06 1.0875 8.183E-06 1.6861 6.972E-06 2.3712 5.891E-06 1.4655 6.097E-06 0.6180 6.858E-06 0.7640 7.570E-06 1.1430 7.222E-06 1.7673 6.134E-06 2.4820 5.208E-06 1.5411 5.337E-06 0.6497 6.072E-06 0.8034 6.682E-06 1.2013 6.349E-06 1.8524 5.386E-06 2.5981 4.602E-06 1.6206 4.668E-06 0.6830 5.369E-06 0.8448 5.881E-06 1.2625 5.568E-06 1.9416 4.726E-06 2.7195 4.065E-06 1.7042 4.082E-06 0.7181 4.745E-06 0.8883 5.168E-06 1.3269 4.878E-06 2.0352 4.147E-06 2.8467 3.591E-06 1.7921 3.569E-06 0.7549 4.193E-06 0.9341 4.540E-06 1.3946 4.272E-06 2.1332 3.639E-06 2.9798 3.172E-06 1.8845 3.121E-06 0.7936 3.705E-06 0.9822 3.987E-06 1.4658 3.741E-06 2.2359 3.193E-06 3.1191 2.802E-06 1.9817 2.729E-06 0.8343 3.274E-06 1.0329 3.502E-06 1.5406 3.275E-06 2.3436 2.802E-06 3.2650 2.475E-06 2.0840 2.387E-06 0.8771 2.893E-06 1.0861 3.075E-06 1.6192 2.868E-06 2.4565 2.459E-06 3.4176 2.185E-06 2.1914 2.088E-06 0.9221 2.556E-06 1.1420 2.700E-06 1.7018 2.511E-06 2.5748 2.158E-06 3.5774 1.930E-06 2.3045 1.826E-06 0.9694 2.258E-06 1.2009 2.371E-06 1.7886 2.199E-06 2.6988 1.893E-06 3.7447 1.703E-06 2.4233 1.597E-06 1.0191 1.995E-06 1.2628 2.082E-06 1.8798 1.925E-06 2.8287 1.661E-06 3.9198 1.502E-06 2.5483 1.395E-06 1.0713 1.762E-06 1.3278 1.828E-06 1.9757 1.685E-06 2.9650 1.455E-06 4.1030 1.323E-06 A-2 North Anna Power Station Units 1 and 2Seismic Hazard and Screening ReportAppendix ATable A-la: PGA Seismic Hazard Curves at North AnnaMean 5th Fractile 16'" Fractile 50th Fractile 84t" Fractile 95t" FractilePGA AEP PGA AEP PGA AEP PGA AEP PGA AEP PGA AEP(g) (g) (g) (g) (q) (g)2.6798 1.216E-06 1.1263 1.555E-06 1.3962 1.603E-06 2.0765 1.474E-06 3.1078 1.272E-06 4.2949 1.161E-06 2.8180 1.055E-06 1.1840 1.369E-06 1.4682 1.405E-06 2.1824 1.286E-06 3.2575 1.109E-06 4.4957 1.014E-06 2.9633 9.115E-07 1.2448 1.202E-06 1.5438 1.226E-06 2.2938 1.119E-06 3.4143 9.628E-07 4.7059 8.818E-07 3.1162 7.830E-07 1.3086 1.048E-06 1.6234 1.065E-06 2.4108 9.673E-07 3.5788 8.314E-07 4.9259 7.620E-07 3.2769 6.691E-07 1.3757 9.053E-07 1.7070 9.167E-07 2.5338 8.312E-07 3.7511 7.144E-07 5.1562 6.550E-07 3.4459 5.697E-07 1.4463 7.745E-07 1.7950 7.821E-07 2.6631 7.095E-07 3.9318 6.112E-07 5.3973 5.608E-07 3.6237 4.839E-07 1.5205 6.565E-07 1.8875 6.615E-07 2.7989 6.025E-07 4.1212 5.214E-07 5.6497 4.788E-07 3.8106 4.104E-07 1.5984 5.525E-07 1.9847 5.559E-07 2.9417 5.096E-07 4.3196 4.439E-07 5.9138 4.081E-07 4.0071 3.477E-07 1.6804 4.631E-07 2.0870 4.653E-07 3.0918 4.301E-07 4.5277 3.774E-07 6.1903 3.475E-07 4.2138 2.944E-07 1.7666 3.871E-07 2.1945 3.887E-07 3.2495 3.625E-07 4.7457 3.206E-07 6.4798 2.956E-07 4.4311 2.489E-07 1.8572 3.231E-07 2.3076 3.242E-07 3.4153 3.052E-07 4.9743 2.721E-07 6.7827 2.513E-07 4.6597 2.103E-07 1.9524 2.695E-07 2.4265 2.702E-07 3.5895 2.567E-07 5.2139 2.307E-07 7.0999 2.133E-07 4.9000 1.773E-07 2.0526 2.245E-07 2.5515 2.249E-07 3.7726 2.156E-07 5.4650 1.953E-07 7.4318 1.808E-07 5.1528 1.492E-07 2.1579 1.867E-07 2.6830 1.869E-07 3.9651 1.807E-07 5.7282 1.651E-07 7.7793 1.529E-07 5.4185 1.250E-07 2.2685 1.549E-07 2.8212 1.548E-07 4.1674 1.511E-07 6.0040 1.390E-07 8.1430 1.289E-07 5.6980 1.041E-07 2.3849 1.280E-07 2.9666 1.278E-07 4.3800 1.258E-07 6.2932 1.165E-07 8.5238 1.081E-07 5.9919 8.596E-08 2.5072 1.051E-07 3.1194 1.047E-07 4.6034 1.039E-07 6.5963 9.686E-08 8.9223 8.995E-08 6.3010 7.022E-08 2.6358 8.539E-08 3.2802 8.500E-08 4.8382 8.494E-08 6.9140 7.978E-08 9.3395 7.424E-08 6,6260 5.668E-08 2.7709 6.860E-08 3.4492 6.820E-08 5.0851 6.852E-08 7.2470 6.494E-08 9.7761 6.066E-08 6.9677 4.518E-08 2.9131 5.435E-08 3.6269 5.398E-08 5.3445 5.445E-08 7.5960 5.219E-08 10.2332 4.903E-08 7.3271 3.554E-08 3.0625 4.243E-08 3.8138 4.210E-08 5.6171 4.260E-08 7.9618 4.137E-08 10.7117 3.916E-08 A-3 North Anna Power Station Units 1 and 2Seismic Hazard and Screening ReportAppendix ATable A-lb: 0.5 Hz Seismic Hazard Curves at North AnnaMean 5t' Fractile 16t' Fractile 50"' Fractile 84trn Fractile 951" FractilePSA AEP PSA AEP PSA AEP PSA AEP PSA AEP PSA AEP(g) (g) (g) (g) (g) (g)0.0100 1.095E-03 0.0030 1.069E-03 0.0045 1.076E-03 0.0080 1.084E-03 0.0136 1.090E-03 0.0187 1.099E-03 0.0105 1.002E-03 0.0032 9.939E-04 0.0047 9.970E-04 0.0084 1.005E-03 0.0143 1.008E-03 0.0196 1.008E-03 0.0111 9.040E-04 0.0033 9.190E-04 0.0050 9.153E-04 0.0087 9.161E-04 0.0149 9.152E-04 0.0206 9.066E-04 0.0117 8.146E-04 0.0035 8.497E-04 0.0052 8.401E-04 0.0091 8.344E-04 0.0156 8.297E-04 0.0217 8.142E-04 0.0123 7.340E-04 0.0036 7.857E-04 0.0054 7.711E-04 0.0095 7.600E-04 0.0164 7.522E-04 0.0228 7.312E-04 0.0129 6.613E-04 0.0038 7.265E-04 0.0057 7.078E-04 0.0100 6.921E-04 0.0171 6.819E-04 0.0239 6.566E-04 0.0136 5.959E-04 0.0039 6.717E-04 0.0059 6.497E-04 0.0104 6.302E-04 0.0179 6.183E-04 0.0251 5.896E-04 0.0143 5.369E-04 0.0041 6.212E-04 0.0062 5.963E-04 0.0109 5.739E-04 0.0188 5.606E-04 0.0264 5.294E-04 0.0151 4.837E-04 0.0043 5.744E-04 0.0065 5.474E-04 0.0114 5.226E-04 0.0197 5.082E-04 0.0278 4.754E-04 0.0158 4.359E-04 0.0045 5.312E-04 0.0067 5.023E-04 0.0119 4.759E-04 0.0206 4.608E-04 0.0292 4.269E-04 0.0167 3.928E-04 0.0047 4.913E-04 0.0071 4.609E-04 0.0125 4.334E-04 0.0216 4.178E-04 0.0306 3.834E-04 0.0176 3.539E-04 0.0049 4.544E-04 0.0074 4.230E-04 0.0130 3.946E-04 0.0226 3.787E-04 0.0322 3.443E-04 0.0185 3.188E-04 0.0051 4.202E-04 0.0077 3.883E-04 0.0136 3.593E-04 0.0237 3.433E-04 0.0338 3.092E-04 0.0194 2.873E-04 0.0054 3.887E-04 0.0080 3.564E-04 0.0142 3.272E-04 0.0248 3.112E-04 0.0355 2.776E-04 0.0205 2.589E-04 0.0056 3.595E-04 0.0084 3.271 E-04 0.0149 2.980E-04 0.0260 2.822E-04 0.0374 2.493E-04 0.0215 2.333E-04 0.0058 3.325E-04 0.0088 3.001 E-04 0.0156 2.713E-04 0.0272 2.558E-04 0.0392 2.239E-04 0.0227 2.102E-04 0.0061 3.076E-04 0.0092 2.755E-04 0.0163 2.471E-04 0.0285 2.319E-04 0.0412 2.010E-04 0.0239 1.893E-04 0.0064 2.845E-04 0.0096 2.528E-04 0.0170 2.251E-04 0.0298 2.102E-04 0.0433 1.805E-04 0.0251 1.706E-04 0.0067 2.631E-04 0.0100 2.319E-04 0.0178 2.049E-04 0.0312 1.906E-04 0.0455 1.621E-04 0.0264 1.537E-04 0.0070 2.433E-04 0.0105 2.128E-04 0.0186 1.866E-04 0.0327 1.728E-04 0.0478 1.456E-04 0.0278 1.385E-04 0.0073 2.250E-04 0.0109 1.953E-04 0.0194 1.700E-04 0.0342 1.566E-04 0.0503 1.307E-04 0.0293 1.248E-04 0.0076 2.081E-04 0.0114 1.792E-04 0.0203 1.548E-04 0.0359 1.420E-04 0.0528 1.174E-04 0.0308 1.124E-04 0.0079 1.924E-04 0.0120 1.644E-04 0.0212 1.410E-04 0.0375 1.287E-04 0.0555 1.054E-04 0.0325 1.012E-04 0.0083 1.780E-04 0.0125 1.508E-04 0.0222 1.284E-04 0.0393 1.167E-04 0.0583 9.523E-05 0.0342 9.013E-05 0.0086 1.646E-04 0.0131 1.384E-04 0.0232 1.169E-04 0.0412 1.058E-04 0.0612 8.645E-05 0.0359 8.007E-05 0.0090 1.522E-04 0.0136 1.270E-04 0.0242 1.065E-04 0.0431 9.538E-05 0.0644 7.854E-05 0.0378 7.112E-05 0.0094 1.408E-04 0.0143 1.165E-04 0.0253 9.611E-05 0.0452 8.566E-05 0.0676 7.135E-05 0.0398 6.318E-05 0.0099 1.302E-04 0.0149 1.069E-04 0.0265 8.595E-05 0.0473 7.687E-05 0.0710 6.481E-05 0.0419 5.612E-05 0.0103 1.204E-04 0.0156 9.739E-05 0.0277 7.670E-05 0.0495 6.899E-05 0.0746 5.888E-05 0.0441 4.985E-05 0.0108 1.113E-04 0.0163 8.767E-05 0.0289 6.845E-05 0.0519 6.191E-05 0.0784 5.349E-05 0.0464 4.428E-05 0.0112 1.028E-04 0.0170 7.874E-05 0.0302 6.108E-05 0.0543 5.555E-05 0.0824 4.859E-05 0.0489 3.933E-05 0.0117 9.335E-05 0.0178 7.071 E-05 0.0316 5.451 E-05 0.0569 4.985E-05 0.0866 4.414E-05 0.0514 3.494E-05 0.0123 8.400E-05 0.0186 6.351E-05 0.0330 4.864E-05 0.0595 4.473E-05 0.0910 4.01OE-05 0.0542 3.103E-05 0.0128 7.551E-05 0.0194 5.704E-05 0.0345 4.340E-05 0.0624 4.014E-05 0.0956 3.642E-05 0.0570 2.756E-05 0.0134 6.787E-05 0.0203 5.124E-05 0.0361 3.873E-05 0.0653 3.602E-05 0.1004 3.309E-05 0.0600 2.448E-05 0.0140 6.101E-05 0.0212 4.602E-05 0.0377 3.456E-05 0.0684 3.232E-05 0.1055 3.006E-05 0.0631 2.175E-05 0.0146 5.483E-05 0.0221 4.133E-05 0.0395 3.084E-05 0.0716 2.900E-05 0.1109 2.731E-05 0.0665 1.931E-05 0.0152 4.929E-05 0.0231 3.711E-05 0.0412 2.752E-05 0.0750 2.603E-05 0.1165 2.480E-05 0.0700 1.715E-05 0.0159 4.431E-05 0.0242 3.333E-05 0.0431 2.456E-05 0.0785 2.335E-05 0.1224 2.253E-05 0.0736 1.524E-05 0.0166 3.983E-05 0.0253 2.993E-05 0.0451 2.191E-05 0.0822 2.095E-05 0.1286 2.047E-05 0.0775 1.353E-05 0.0174 3.581E-05 0.0264 2.687E-05 0.0471 1.955E-05 0.0861 1.880E-05 0.1351 1.859E-05 A-4 North Anna Power Station Units I and 2Seismic Hazard and Screening ReportAppendix ATable A-lb: 0.5 Hz Seismic Hazard Curves at North AnnaMean 5"f Fractile 16"' Fractile 50" Fractile 841" Fractile 951f FractilePSA AEP PSA AEP PSA AEP PSA AEP PSA AEP PSA AEP( (g) (g) (g) (g) (g)0.0816 1.202E-05 0.0182 3.219E-05 0.0276 2.413E-05 0.0493 1.744E-05 0.0902 1.687E-05 0.1420 1.689E-05 0.0859 1.067E-05 0.0190 2.894E-05 0.0288 2.167E-05 0.0515 1.556E-05 0.0944 1.514E-05 0.1492 1.534E-05 0.0904 9.526E-06 0.0198 2.602E-05 0.0301 1.946E-05 0.0538 1.389E-05 0.0989 1.358E-05 0.1567 1.393E-05 0.0951 8.539E-06 0.0207 2.339E-05 0.0315 1.748E-05 0.0563 1.239E-05 0.1036 1.219E-05 0.1647 1.265E-05 0.1001 7.659E-06 0.0216 2.103E-05 0.0329 1.569E-05 0.0588 1.105E-05 0.1085 1.093E-05 0.1730 1.149E-05 0.1054 6.870E-06 0.0226 1.890E-05 0.0344 1.409E-05 0.0615 9.862E-06 0.1136 9.804E-06 0.1818 1.044E-05 0.1109 6.162E-06 0.0236 1.699E-05 0.0359 1.265E-05 0.0643 8.804E-06 0.1189 8.786E-06 0.1910 9.434E-06 0.1167 5.527E-06 0.0246 1.527E-05 0.0375 1.136E-05 0.0672 7.859E-06 0.1246 7.872E-06 0.2007 8.507E-06 0.1229 4.957E-06 0.0257 1.373E-05 0.0392 1.020E-05 0.0702 7.016E-06 0.1304 7.053E-06 0.2109 7.668E-06 0.1293 4.446E-06 0.0269 1.234E-05 0.0410 9.068E-06 0.0734 6.263E-06 0.1366 6.319E-06 0.2215 6.911E-06 0.1361 3.987E-06 0.0281 1.109E-05 0.0428 8.041E-06 0.0767 5.591E-06 0.1430 5.662E-06 0.2328 6.229E-06 0.1433 3.576E-06 0.0293 9.935E-06 0.0447 7.129E-06 0.0802 4.991E-06 0.1498 5.072E-06 0.2446 5.615E-06 0.1508 3.206E-06 0.0306 8.819E-06 0.0467 6.321E-06 0.0838 4.455E-06 0.1569 4.543E-06 0.2570 5.061E-06 0.1587 2.875E-06 0.0320 7.807E-06 0.0489 5.604E-06 0.0876 3.976E-06 0.1643 4.069E-06 0.2700 4.561E-06 0.1671 2.578E-06 0.0334 6.911E-06 0.0510 4.968E-06 0.0916 3.549E-06 0.1720 3.645E-06 0.2837 4.111E-06 0.1758 2.311E-06 0.0349 6.117E-06 0.0533 4.405E-06 0.0958 3.167E-06 0.1801 3.265E-06 0.2981 3.705E-06 0.1851 2.072E-06 0.0365 5.415E-06 0.0557 3.904E-06 0.1001 2.827E-06 0.1886 2.924E-06 0.3132 3.339E-06 0.1948 1.857E-06 0.0381 4.793E-06 0.0582 3.461E-06 0.1047 2.523E-06 0.1975 2.618E-06 0.3291 3.009E-06 0.2050 1.665E-06 0.0398 4.242E-06 0.0609 3.068E-06 0.1094 2.251E-06 0.2069 2.345E-06 0.3457 2.712E-06 0.2158 1.493E-06 0.0416 3.754E-06 0.0636 2.720E-06 0.1144 2.009E-06 0.2166 2.100E-06 0.3633 2.443E-06 0.2272 1.337E-06 0.0434 3.322E-06 0.0665 2.410E-06 0.1195 1.792E-06 0.2269 1.880E-06 0.3817 2.202E-06 0.2391 1.199E-06 0.0453 2.940E-06 0.0695 2.136E-06 0.1250 1.599E-06 0.2376 1.684E-06 0.4010 1.984E-06 0.2517 1.074E-06 0.0474 2.601E-06 0.0726 1.893E-06 0.1306 1.426E-06 0.2488 1.507E-06 0.4214 1.787E-06 0.2649 9.594E-07 0.0495 2.302E-06 0.0758 1.677E-06 0.1366 1.272E-06 0.2605 1.350E-06 0.4427 1.611E-06 0.2788 8.534E-07 0.0517 2.036E-06 0.0793 1.486E-06 0.1427 1.135E-06 0.2728 1.208E-06 0.4652 1.451E-06 0.2935 7.582E-07 0.0540 1.802E-06 0.0828 1.317E-06 0.1492 1.011E-06 0.2857 1.081E-06 0.4888 1.307E-06 0.3089 6.736E-07 0.0564 1.594E-06 0.0865 1.167E-06 0.1560 8.951E-07 0.2992 9.625E-07 0.5135 1.177E-06 0.3251 5.983E-07 0.0589 1.410E-06 0.0904 1.033E-06 0.1631 7.899E-07 0.3133 8.500E-07 0.5396 1.060E-06 0.3422 5.313E-07 0.0615 1.247E-06 0.0945 9.048E-07 0.1704 6.970E-07 0.3281 7.488E-07 0.5669 9.427E-07 0.3602 4.717E-07 0.0643 1.102E-06 0.0988 7.884E-07 0.1782 6.148E-07 0.3436 6.596E-07 0.5957 8.271E-07 0.3791 4.185E-07 0.0671 9.677E-07 0.1032 6.865E-07 0.1863 5.422E-07 0.3598 5.808E-07 0.6259 7.234E-07 0.3990 3.713E-07 0.0701 8.391E-07 0.1078 5.977E-07 0.1947 4.781E-07 0.3768 5.112E-07 0.6576 6.325E-07 0.4200 3.293E-07 0.0733 7.243E-07 0.1127 5.201E-07 0.2035 4.213E-07 0.3946 4.499E-07 0.6909 5.530E-07 0.4420 2.919E-07 0.0765 6.249E-07 0.1178 4.525E-07 0.2128 3.712E-07 0.4132 3.958E-07 0.7260 4.832E-07 0.4653 2.587E-07 0.0799 5.390E-07 0.1230 3.935E-07 0.2224 3.269E-07 0.4327 3.480E-07 0.7628 4.221E-07 0.4897 2.291E-07 0.0835 4.648E-07 0.1286 3.420E-07 0.2325 2.878E-07 0.4532 3.059E-07 0.8014 3.686E-07 0.5154 2.027E-07 0.0872 4.006E-07 0.1344 2.971E-07 0.2430 2.532E-07 0.4745 2.687E-07 0.8421 3.217E-07 0.5425 1.793E-07 0.0911 3.450E-07 0.1404 2.579E-07 0.2540 2.226E-07 0.4969 2.359E-07 0.8847 2.806E-07 0.5710 1.584E-07 0.0952 2.970E-07 0.1467 2.237E-07 0.2656 1.956E-07 0.5204 2.070E-07 0.9296 2.446E-07 0.6010 1.399E-07 0.0994 2.555E-07 0.1533 1.938E-07 0.2776 1.717E-07 0.5450 1.815E-07 0.9767 2.130E-07 0.6326 1.234E-07 0.1038 2.195E-07 0.1602 1.678E-07 0.2902 1.506E-07 0.5707 1.590E-07 1.0262 1.854E-07 A-5 North Anna Power Station Units 1 and 2Seismic Hazard and Screening ReportAppendix ATable A-lb: 0.5 Hz Seismic Hazard Curves at North AnnaMean 5'" Fractile 16"n Fractile 50t" Fractile 84"' Fractile 95"' FractilePSA AEP PSA AEP PSA AEP PSA AEP PSA AEP PSA AEP()(g) (g) (g) (g) (g)0.6659 1.087E-07 0.1085 1.885E-07 0.1674 1.451E-07 0.3033 1.319E-07 0.5976 1.391E-07 1.0783 1.612E-07 0.7008 9.557E-08 0.1133 1.616E-07 0.1750 1.252E-07 0.3171 1.154E-07 0.6258 1.215E-07 1.1329 1.400E-07 0.7377 8.281E-08 0.1184 1.384E-07 0.1828 1.080E-07 0.3315 1.008E-07 0.6554 1.060E-07 1.1904 1.214E-07 0.7764 7.095E-08 0.1236 1.183E-07 0.1910 9.275E-08 0.3465 8.716E-08 0.6863 9.221E-08 1.2507 1.052E-07 0.8172 6.052E-08 0.1291 1.009E-07 0.1996 7.862E-08 0.3622 7.408E-08 0.7187 7.835E-08 1.3141 9.052E-08 0.8602 5.143E-08 0.1349 8.497E-08 0.2086 6.608E-08 0.3786 6.244E-08 0.7527 6.583E-08 1.3807 7.590E-08 0.9054 4.351E-08 0.1409 7.045E-08 0.2180 5.531E-08 0.3958 5.241E-08 0.7882 5.508E-08 1.4507 6.298E-08 0.9529 3.662E-08 0.1472 5.793E-08 0.2278 4.606E-08 0.4137 4.376E-08 0.8254 4.585E-08 1.5243 5.200E-08 1.0030 3.061E-08 0.1538 4.734E-08 0.2380 3.812E-08 0.4325 3.632E-08 0.8644 3.793E-08 1.6015 4.267E-08 1.0557 2.538E-08 0.1606 3.840E-08 0.2487 3.131E-08 0.4521 2.991E-08 0.9052 3.114E-08 1.6827 3.474E-08 1.1112 2.082E-08 0.1678 3.085E-08 0.2599 2.547E-08 0.4726 2.438E-08 0.9479 2.530E-08 1.7680 2.801 E-081.1696 1.685E-08 0.1752 2.449E-08 0.2716 2.045E-08 0.4940 1.962E-08 0.9926 2.030E-08 1.8577 2.229E-08 1.2310 1.339E-08 0.1831 1.911E-08 0.2838 1.613E-08 0.5164 1.552E-08 1.0395 1.600E-08 1.9519 1.744E-08 1.2957 1.037E-08 0.1912 1.457E-08 0.2966 1.243E-08 0.5398 1.199E-08 1.0886 1.231E-08 2.0508 1.331E-08 1.3638 7.747E-09 0.1997 1.074E-08 0.3099 9.257E-09 0.5643 8.940E-09 1.1399 9.150E-09 2.1548 9.799E-09 1.4354 5.460E-09 0.2086 7.505E-09 0.3239 6.531E-09 0.5899 6.318E-09 1.1937 6.435E-09 2.2640 6.819E-09 1.5109 3.468E-09 0.2179 4.776E-09 0.3385 4.191E-09 0.6166 4.058E-09 1.2501 4.104E-09 2.3788 4.289E-09 1.5903 1.732E-09 0.2276 2.473E-09 0.3537 2.182E-09 0.6446 2.111E-09 1.3091 2.105E-09 2.4994 2.139E-09 A-6 North Anna Power Station Units I and 2Seismic Hazard and Screening ReportAppendix ATable A-Ic: 1 Hz Seismic Hazard Curves at North AnnaMean 5th Fractile 16"' Fractile 50t" Fractile 84th Fractile 95'0 FractilePSA AEP PSA AEP PSA AEP PSA AEP PSA AEP PSA AEP(g) (g) (g) (g) (g)0.0164 1.090E-03 0.0074 1.074E-03 0.0098 1.078E-03 0.0146 1.085E-03 0.0209 1.085E-03 0.0278 1.087E-03 0.0172 1.002E-03 0.0078 9.958E-04 0.0102 9.982E-04 0.0152 1.003E-03 0.0219 1.008E-03 0.0292 1.010E-03 0.0181 9.074E-04 0.0081 9.151E-04 0.0107 9.146E-04 0.0160 9.129E-04 0.0230 9.188E-04 0.0307 9.203E-04 0.0190 8.212E-04 0.0085 8.407E-04 0.0112 8.375E-04 0.0167 8.300E-04 0.0241 8.366E-04 0.0322 8.371E-04 0.0200 7.431E-04 0.0089 7.723E-04 0.0117 7.670E-04 0.0175 7.546E-04 0.0253 7.618E-04 0.0339 7.613E-04 0.0210 6.725E-04 0.0092 7.096E-04 0.0122 7.025E-04 0.0183 6.860E-04 0.0265 6.937E-04 0.0356 6.924E-04 0.0221 6.086E-04 0.0097 6.519E-04 0.0128 6.433E-04 0.0191 6.237E-04 0.0278 6.317E-04 0.0374 6.297E-04 0.0233 5.507E-04 0.0101 5.990E-04 0.0133 5.892E-04 0.0200 5.670E-04 0.0292 5.753E-04 0.0393 5.727E-04 0.0245 4.983E-04 0.0105 5.503E-04 0.0139 5.397E-04 0.0210 5.156E-04 0.0306 5.239E-04 0.0412 5.209E-04 0.0257 4.508E-04 0.0110 5.056E-04 0.0146 4.944E-04 0.0219 4.687E-04 0.0321 4.771E-04 0.0433 4.737E-04 0.0270 4.079E-04 0.0115 4.645E-04 0.0152 4.529E-04 0.0230 4.262E-04 0.0337 4.345E-04 0.0455 4.308E-04 0.0284 3.691E-04 0.0120 4.268E-04 0.0159 4.148E-04 0.0240 3.874E-04 0.0353 3.957E-04 0.0478 3.918E-04 0.0299 3.340E-04 0.0125 3.921E-04 0.0166 3.800E-04 0.0252 3.521E-04 0.0370 3.603E-04 0.0503 3.562E-04 0.0315 3.023E-04 0.0131 3.603E-04 0.0174 3.481E-04 0.0263 3.201E-04 0.0389 3.281E-04 0.0528 3.239E-04 0.0331 2.735E-04 0.0137 3.311E-04 0.0182 3.189E-04 0.0275 2.910E-04 0.0408 2.988E-04 0.0555 2.945E-04 0.0348 2.475E-04 0.0143 3.043E-04 0.0190 2.921E-04 0.0288 2.646E-04 0.0427 2.721E-04 0.0583 2.678E-04 0.0366 2.240E-04 0.0149 2.796E-04 0.0198 2.676E-04 0.0302 2.405E-04 0.0448 2.478E-04 0.0612 2.435E-04 0.0385 2.027E-04 0.0156 2.570E-04 0.0207 2.452E-04 0.0316 2.187E-04 0.0470 2.256E-04 0.0643 2.214E-04 0.0405 1.834E-04 0.0162 2.362E-04 0.0217 2.246E-04 0.0330 1.988E-04 0.0493 2.054E-04 0.0676 2.013E-04 0.0426 1.660E-04 0.0170 2.170E-04 0.0227 2.058E-04 0.0346 1.808E-04 0.0518 1.871E-04 0.0710 1.830E-04 0.0447 1.502E-04 0.0177 1.995E-04 0.0237 1.885E-04 0.0362 1.643E-04 0.0543 1.703E-04 0.0746 1.664E-04 0.0471 1.359E-04 0.0185 1.833E-04 0.0248 1.726E-04 0.0379 1.494E-04 0.0569 1.551E-04 0.0784 1.513E-04 0.0495 1.229E-04 0.0193 1.685E-04 0.0259 1.581E-04 0.0396 1.358E-04 0.0597 1.412E-04 0.0823 1.376E-04 0.0520 1.112E-04 0.0202 1.548E-04 0.0271 1.448E-04 0.0415 1.235E-04 0.0627 1.285E-04 0.0865 1.251 E-040.0547 1.006E-04 0.0211 1.423E-04 0.0283 1.327E-04 0.0434 1.123E-04 0.0657 1.170E-04 0.0909 1.137E-04 0.0576 9.075E-05 0.0220 1.308E-04 0.0296 1.216E-04 0.0454 1.020E-04 0.0689 1.065E-04 0.0955 1.034E-04 0.0605 8.184E-05 0.0230 1.202E-04 0.0309 1.113E-04 0.0476 9.230E-05 0.0723 9.670E-05 0.1003 9.403E-05 0.0636 7.381E-05 0.0240 1.105E-04 0.0323 1.020E-04 0.0498 8.338E-05 0.0759 8.760E-05 0.1054 8.557E-05 0.0669 6.656E-05 0.0251 1.014E-04 0.0338 9.225E-05 0.0521 7.532E-05 0.0796 7.930E-05 0.1107 7.786E-05 0.0704 6.002E-05 0.0262 9.183E-05 0.0353 8.313E-05 0.0545 6.804E-05 0.0835 7.179E-05 0.1163 7.086E-05 0.0740 5.413E-05 0.0273 8.280E-05 0.0369 7.491E-05 0.0570 6.146E-05 0.0875 6.498E-05 0.1222 6.448E-05 0.0778 4.880E-05 0.0285 7.464E-05 0.0385 6.750E-05 0.0597 5.551E-05 0.0918 5.882E-05 0.1284 5.868E-05 0.0819 4.401E-05 0.0298 6.730E-05 0.0403 6.083E-05 0.0625 5.015E-05 0.0963 5.324E-05 0.1349 5.339E-05 0.0861 3.969E-05 0.0311 6.067E-05 0.0421 5.481E-05 0.0654 4.530E-05 0.1010 4.819E-05 0.1417 4.858E-05 0.0905 3.579E-05 0.0325 5.471E-05 0.0440 4.939E-05 0.0684 4.092E-05 0.1060 4.362E-05 0.1489 4.421E-05 0.0952 3.227E-05 0.0339 4.932E-05 0.0460 4.451E-05 0.0716 3.696E-05 0.1112 3.948E-05 0.1565 4.022E-05 0.1001 2.909E-05 0.0354 4.446E-05 0.0481 4.009E-05 0.0749 3.338E-05 0.1166 3.574E-05 0.1644 3.659E-05 0.1053 2.624E-05 0.0370 4.008E-05 0.0503 3.612E-05 0.0784 3.015E-05 0.1223 3.235E-05 0.1727 3.329E-05 0.1107 2.365E-05 0.0387 3.613E-05 0.0525 3.253E-05 0.0821 2.724E-05 0.1283 2.928E-05 0.1814 3.029E-05 0.1164 2.133E-05 0.0404 3.257E-05 0.0549 2.931E-05 0.0859 2.460E-05 0.1346 2.650E-05 0.1906 2.756E-05 0.1225 1.923E-05 0.0422 2.937E-05 0.0574 2.640E-05 0.0899 2.222E-05 0.1412 2.398E-05 0.2003 2.507E-05 A-7 North Anna Power Station Units I and 2Seismic Hazard and Screening ReportAppendix ATable A-Ic: 1 Hz Seismic Hazard Curves at North AnnaMean 5"' Fractile 16tn Fractile 50"n Fractile 84'" Fractile 95 fl FractilePSA AEP PSA AEP PSA AEP PSA AEP PSA AEP PSA AEP(g) (g) (_) (g) (g) (g)0.1288 1.734E-05 0.0440 2.648E-05 0.0600 2.378E-05 0.0941 2.007E-05 0.1481 2.170E-05 0.2104 2.281E-05 0.1354 1.563E-05 0.0460 2.387E-05 0.0627 2.142E-05 0.0985 1.812E-05 0.1553 1.964E-05 0.2211 2.075E-05 0.1424 1.409E-05 0.0480 2.151E-05 0.0656 1.929E-05 0.1030 1.637E-05 0.1629 1.777E-05 0.2322 1.888E-05 0.1498 1.270E-05 0.0501 1.938E-05 0.0685 1.738E-05 0.1078 1.478E-05 0.1709 1.608E-05 0.2440 1.718E-05 0.1575 1.145E-05 0.0524 1.747E-05 0.0716 1.566E-05 0.1129 1.335E-05 0.1793 1.456E-05 0.2564 1.563E-05 0.1656 1.032E-05 0.0547 1.575E-05 0.0749 1.410E-05 0.1181 1.206E-05 0.1881 1.317E-05 0.2693 1.421E-05 0.1742 9.265E-06 0.0571 1.419E-05 0.0782 1.270E-05 0.1236 1.089E-05 0.1973 1.192E-05 0.2830 1.293E-05 0.1832 8.302E-06 0.0596 1.278E-05 0.0818 1.144E-05 0.1294 9.806E-06 0.2069 1.078E-05 0.2973 1.176E-05 0.1926 7.437E-06 0.0623 1.152E-05 0.0855 1.030E-05 0.1354 8.803E-06 0.2171 9.720E-06 0.3123 1.070E-05 0.2026 6.663E-06 0.0650 1.038E-05 0.0894 9.201E-06 0.1417 7.891E-06 0.2277 8.725E-06 0.3281 9.670E-06 0.2130 5.969E-06 0.0679 9.272E-06 0.0934 8.191E-06 0.1483 7.073E-06 0.2388 7.821E-06 0.3448 8.678E-06 0.2240 5.347E-06 0.0709 8.241E-06 0.0976 7.292E-06 0.1552 6.339E-06 0.2505 7.010E-06 0.3622 7.768E-06 0.2356 4.790E-06 0.0741 7.322E-06 0.1020 6.490E-06 0.1624 5.681E-06 0.2628 6.283E-06 0.3805 6.954E-06 0.2478 4.291 E-06 0.0773 6.506E-06 0.1067 5.777E-06 0.1700 5.091 E-06 0.2756 5.631 E-06 0.3998 6.224E-06 0.2606 3.843E-06 0.0808 5.781 E-06 0.1115 5.142E-06 0.1779 4.562E-06 0.2891 5.046E-06 0.4200 5.571 E-060.2740 3.443E-06 0.0843 5.136E-06 0.1165 4.577E-06 0.1861 4.089E-06 0.3033 4.522E-06 0.4413 4.987E-06 0.2882 3.084E-06 0.0881 4.563E-06 0.1218 4.073E-06 0.1948 3.664E-06 0.3181 4.053E-06 0.4636 4.463E-06 0.3030 2.762E-06 0.0920 4.054E-06 0.1273 3.625E-06 0.2039 3.283E-06 0.3337 3.632E-06 0.4871 3.995E-06 0.3187 2.473E-06 0.0960 3.601 E-06 0.1331 3.225E-06 0.2134 2.941 E-06 0.3500 3.254E-06 0.5118 3.575E-06 0.3351 2.215E-06 0.1003 3.199E-06 0.1391 2.870E-06 0.2233 2.636E-06 0.3672 2.915E-06 0.5377 3.200E-06 0.3524 1.984E-06 0.1047 2.841E-06 0.1454 2.554E-06 0.2337 2.361E-06 0.3851 2.612E-06 0.5649 2.864E-06 0.3706 1.776E-06 0.1094 2.524E-06 0.1520 2.272E-06 0.2446 2.116E-06 0.4040 2.340E-06 0.5935 2.563E-06 0.3897 1.590E-06 0.1142 2.241E-06 0.1588 2.022E-06 0.2559 1.895E-06 0.4238 2.096E-06 0.6235 2.293E-06 0.4099 1.423E-06 0.1193 1.990E-06 0.1660 1.798E-06 0.2679 1.698E-06 0.4445 1.878E-06 0.6551 2.052E-06 0.4310 1.274E-06 0.1246 1.767E-06 0.1735 1.599E-06 0.2803 1.520E-06 0.4663 1.682E-06 0.6882 1.836E-06 0.4533 1.140E-06 0.1301 1.569E-06 0.1814 1.422E-06 0.2934 1.362E-06 0.4891 1.506E-06 0.7231 1.643E-06 0.4767 1.019E-06 0.1358 1.393E-06 0.1896 1.265E-06 0.3070 1.219E-06 0.5130 1.349E-06 0.7597 1.469E-06 0.5013 9.013E-07 0.1419 1.237E-06 0.1982 1.124E-06 0.3213 1.091E-06 0.5382 1.208E-06 0.7981 1.315E-06 0.5272 7.923E-07 0.1481 1.097E-06 0.2071 9.957E-07 0.3363 9.702E-07 0.5645 1.082E-06 0.8385 1.176E-06 0.5544 6.962E-07 0.1547 9.674E-07 0.2165 8.740E-07 0.3519 8.525E-07 0.5921 9.593E-07 0.8810 1.051E-06 0.5830 6.116E-07 0.1616 8.448E-07 0.2263 7.630E-07 0.3683 7.452E-07 0.6211 8.409E-07 0.9255 9.254E-07 0.6131 5.372E-07 0.1687 7.345E-07 0.2365 6.658E-07 0.3854 6.511E-07 0.6515 7.336E-07 0.9724 8.040E-07 0.6448 4.717E-07 0.1762 6.383E-07 0.2472 5.809E-07 0.4034 5.688E-07 0.6834 6.398E-07 1.0216 6.967E-07 0.6780 4.140E-07 0.1840 5.545E-07 0.2584 5.066E-07 0.4222 4.966E-07 0.7169 5.578E-07 1.0733 6.035E-07 0.7130 3.632E-07 0.1921 4.816E-07 0.2701 4.417E-07 0.4418 4.335E-07 0.7520 4.862E-07 1.1277 5.226E-07 0.7499 3.186E-07 0.2006 4.181E-07 0.2823 3.848E-07 0.4624 3.783E-07 0.7888 4.236E-07 1.1847 4.524E-07 0.7886 2.792E-07 0.2095 3.628E-07 0.2951 3.352E-07 0.4839 3.299E-07 0.8274 3.689E-07 1.2447 3.914E-07 0.8293 2.446E-07 0.2188 3.146E-07 0.3085 2.918E-07 0.5064 2.876E-07 0.8679 3.211E-07 1.3077 3.385E-07 0.8721 2.141E-07 0.2285 2.727E-07 0.3224 2.538E-07 0.5300 2.505E-07 0.9104 2.793E-07 1.3739 2.926E-07 0.9171 1.873E-07 0.2386 2.361E-07 0.3370 2.207E-07 0.5546 2.180E-07 0.9549 2.428E-07 1.4434 2.527E-07 0.9645 1.637E-07 0.2492 2.043E-07 0.3523 1.917E-07 0.5804 1.896E-07 1.0017 2.109E-07 1.5165 2.180E-07 A-8 North Anna Power Station Units I and 2Seismic Hazard and Screening ReportAppendix ATable A-Ic: 1 Hz Seismic Hazard Curves at North AnnaMean 5 " Fractile 16tn Fractile 50ht Fractile 841" Fractile 95'h FractilePSA AEP PSA AEP PSA AEP PSA AEP PSA AEP PSA AEP(g) (g) (g) (g) (g) (q)1.0142 1.428E-07 0.2602 1.767E-07 0.3682 1.663E-07 0.6075 1.647E-07 1.0507 1.831E-07 1.5933 1.880E-07 1.0666 1.246E-07 0.2718 1.525E-07 0.3849 1.441E-07 0.6357 1.430E-07 1.1021 1.587E-07 1.6739 1.619E-07 1.1217 1.084E-07 0.2838 1.315E-07 0.4023 1.247E-07 0.6653 1.239E-07 1.1561 1.374E-07 1.7586 1.392E-07 1.1796 9.417E-08 0.2964 1.132E-07 0.4205 1.077E-07 0.6963 1.072E-07 1.2127 1.188E-07 1.8477 1.195E-07 1.2405 8.021E-08 0.3095 9.722E-08 0.4395 9.248E-08 0.7287 9.217E-08 1.2720 1.026E-07 1.9412 1.024E-07 1.3045 6.740E-08 0.3232 8.219E-08 0.4594 7.807E-08 0.7626 7.781E-08 1.3343 8.726E-08 2.0394 8.666E-08 1.3718 5.639E-08 0.3375 6.828E-08 0.4802 6.496E-08 0.7981 6.472E-08 1.3996 7.264E-08 2.1427 7.198E-08 1.4427 4.695E-08 0.3525 5.639E-08 0.5019 5.378E-08 0.8352 5.357E-08 1.4681 5.970E-08 2.2511 5.916E-08 1.5171 3.885E-08 0.3681 4.631E-08 0.5246 4.426E-08 0.8741 4.408E-08 1.5400 4.878E-08 2.3651 4.834E-08 1.5955 3.190E-08 0.3844 3.776E-08 0.5484 3.616E-08 0.9148 3.601E-08 1.6153 3.957E-08 2.4848 3.920E-08 1.6778 2.595E-08 0.4014 3.050E-08 0.5732 2.928E-08 0.9574 2.914E-08 1.6944 3.180E-08 2.6106 3.150E-08 1.7645 2.083E-08 0.4192 2.435E-08 0.5991 2.342E-08 1.0019 2.330E-08 1.7774 2.525E-08 2.7427 2.501E-08 1.8555 1.645E-08 0.4378 1.913E-08 0.6262 1.843E-08 1.0486 1.833E-08 1.8644 1.973E-08 2.8815 1.953E-08 1.9513 1.269E-08 0.4571 1.471E-08 0.6545 1.419E-08 1.0974 1.410E-08 1.9556 1.507E-08 3.0274 1.491 E-082.0521 9.460E-09 0.4774 1.095E-08 0.6842 1.058E-08 1.1484 1.050E-08 2.0513 1.114E-08 3.1806 1.101E-08 2.1580 6.693E-09 0.4985 7.768E-09 0.7151 7.51OE-09 1.2019 7.438E-09 2.1518 7.828E-09 3.3416 7.720E-09 2.2694 4.319E-09 0.5206 5.069E-09 0.7475 4.897E-09 1.2578 4.835E-09 2.2571 5.034E-09 3.5107 4.946E-09 2.3866 2.283E-09 0.5437 2.780E-09 0.7813 2.675E-09 1.3164 2.620E-09 2.3676 2.678E-09 3.6885 2.607E-09 A-9 North Anna Power Station Units I and 2Seismic Hazard and Screening ReportAppendix ATable A-ld: 2.5 Hz Seismic Hazard Curves at North AnnaMean 5 Ih Fractile 161n Fractile 501h Fractile 84'r Fractile 95'" FractilePSA AEP PSA AEP PSA AEP PSA AEP PSA AEP PSA AEP(_) (g) (g) (_) (g) (g)0.0342 1.074E-03 0.0199 1.070E-03 0.0242 1.071 E-03 0.0318 1.072E-03 0.0436 1.073E-03 0.0542 1.072E-03 0.0359 1.042E-03 0.0208 1.039E-03 0.0253 1.041 E-03 0.0333 1.043E-03 0.0458 1.044E-03 0.0569 1.045E-03 0.0377 9.784E-04 0.0217 9.787E-04 0.0265 9.807E-04 0.0349 9.826E-04 0.0480 9.855E-04 0.0597 9.880E-04 0.0397 9.033E-04 0.0227 9.069E-04 0.0277 9.085E-04 0.0366 9.102E-04 0.0504 9.131E-04 0.0627 9.172E-04 0.0417 8.311E-04 0.0238 8.369E-04 0.0290 8.378E-04 0.0383 8.393E-04 0.0529 8.420E-04 0.0659 8.473E-04 0.0438 7.643E-04 0.0248 7.719E-04 0.0303 7.722E-04 0.0402 7.735E-04 0.0555 7.759E-04 0.0692 7.821E-04 0.0460 7.029E-04 0.0259 7.120E-04 0.0317 7.117E-04 0.0421 7.128E-04 0.0582 7.150E-04 0.0727 7.219E-04 0.0484 6.464E-04 0.0271 6.567E-04 0.0332 6.560E-04 0.0441 6.569E-04 0.0611 6.589E-04 0.0763 6.664E-04 0.0508 5.945E-04 0.0283 6.057E-04 0.0347 6.046E-04 0.0462 6.054E-04 0.0641 6.072E-04 0.0802 6.151E-04 0.0534 5.466E-04 0.0296 5.587E-04 0.0363 5.572E-04 0.0484 5.579E-04 0.0673 5.595E-04 0.0842 5.677E-04 0.0562 5.027E-04 0.0310 5.153E-04 0.0380 5.135E-04 0.0507 5.142E-04 0.0706 5.155E-04 0.0884 5.240E-04 0.0590 4.623E-04 0.0324 4.752E-04 0.0397 4.733E-04 0.0532 4.738E-04 0.0741 4.750E-04 0.0928 4.836E-04 0.0620 4.252E-04 0.0338 4.384E-04 0.0416 4.362E-04 0.0557 4.366E-04 0.0778 4.377E-04 0.0975 4.463E-04 0.0652 3.910E-04 0.0354 4.043E-04 0.0435 4.021E-04 0.0584 4.024E-04 0.0816 4.033E-04 0.1024 4.119E-04 0.0685 3.595E-04 0.0370 3.729E-04 0.0455 3.706E-04 0.0612 3.709E-04 0.0856 3.716E-04 0.1075 3.801E-04 0.0720 3.306E-04 0.0386 3.439E-04 0.0476 3.416E-04 0.0641 3.418E-04 0.0899 3.424E-04 0.1129 3.507E-04 0.0757 3.040E-04 0.0404 3.172E-04 0.0497 3.148E-04 0.0672 3.149E-04 0.0943 3.154E-04 0.1186 3.236E-04 0.0795 2.795E-04 0.0422 2.926E-04 0.0520 2.901E-04 0.0704 2.902E-04 0.0990 2.906E-04 0.1246 2.985E-04 0.0836 2.570E-04 0.0441 2.699E-04 0.0544 2.674E-04 0.0737 2.674E-04 0.1038 2.677E-04 0.1308 2.754E-04 0.0878 2.364E-04 0.0461 2.489E-04 0.0569 2.464E-04 0.0773 2.464E-04 0.1090 2.466E-04 0.1374 2.542E-04 0.0923 2.173E-04 0.0482 2.296E-04 0.0596 2.271E-04 0.0810 2.271E-04 0.1143 2.271E-04 0.1443 2.345E-04 0.0970 1.998E-04 0.0504 2.118E-04 0.0623 2.093E-04 0.0848 2.092E-04 0.1200 2.092E-04 0.1515 2.164E-04 0.1020 1.837E-04 0.0527 1.953E-04 0.0652 1.930E-04 0.0889 1.928E-04 0.1259 1.926E-04 0.1591 1.996E-04 0.1072 1.688E-04 0.0551 1.801E-04 0.0682 1.778E-04 0.0932 1.777E-04 0.1321 1.774E-04 0.1671 1.842E-04 0.1126 1.552E-04 0.0576 1.662E-04 0.0713 1.639E-04 0.0976 1.637E-04 0.1386 1.635E-04 0.1755 1.699E-04 0.1184 1.427E-04 0.0602 1.533E-04 0.0746 1.510E-04 0.1023 1.508E-04 0.1455 1.505E-04 0.1843 1.567E-04 0.1244 1.311E-04 0.0629 1.413E-04 0.0780 1.392E-04 0.1072 1.389E-04 0.1527 1.386E-04 0.1936 1.446E-04 0.1307 1.205E-04 0.0657 1.304E-04 0.0816 1.283E-04 0.1123 1.280E-04 0.1602 1.277E-04 0.2033 1.334E-04 0.1374 1.107E-04 0.0687 1.202E-04 0.0854 1.182E-04 0.1177 1.178E-04 0.1681 1.175E-04 0.2135 1.231E-04 0.1444 1.013E-04 0.0718 1.108E-04 0.0893 1.088E-04 0.1233 1.084E-04 0.1764 1.081E-04 0.2242 1.135E-04 0.1518 9.222E-05 0.0751 1.017E-04 0.0934 9.971E-05 0.1292 9.928E-05 0.1851 9.911E-05 0.2355 1.044E-04 0.1595 8.353E-05 0.0784 9.281E-05 0.0977 9.088E-05 0.1354 9.0465-05 0.1943 9.034E-05 0.2473 9.554E-05 0.1676 7.553E-05 0.0820 8.425E-05 0.1022 8.247E-05 0.1419 8.207E-05 0.2038 8.205E-05 0.2597 8.695E-05 0.1762 6.828E-05 0.0857 7.630E-05 0.1069 7.472E-05 0.1486 7.434E-05 0.2139 7.444E-05 0.2727 7.890E-05 0.1851 6.172E-05 0.0896 6.907E-05 0.1118 6.766E-05 0.1558 6.733E-05 0.2245 6.752E-05 0.2864 7.153E-05 0.1946 5.579E-05 0.0936 6.251E-05 0.1170 6.128E-05 0.1632 6.098E-05 0.2355 6.125E-05 0.3008 6.485E-05 0.2045 5.043E-05 0.0979 5.657E-05 0.1223 5.550E-05 0.1710 5.522E-05 0.2472 5.556E-05 0.3159 5.879E-05 0.2149 4.558E-05 0.1023 5.119E-05 0.1280 5.026E-05 0.1792 5.001E-05 0.2594 5.039E-05 0.3318 5.330E-05 0.2259 4.120E-05 0.1069 4.631E-05 0.1339 4.552E-05 0.1878 4.529E-05 0.2722 4.571E-05 0.3484 4.832E-05 0.2374 3.724E-05 0.1118 4.190E-05 0.1400 4.122E-05 0.1968 4.101E-05 0.2856 4.145E-05 0.3659 4.380E-05 0.2495 3.366E-05 0.1168 3.790E-05 0.1465 3.733E-05 0.2062 3.714E-05 0.2997 3.760E-05 0.3843 3.971E-05 A-10 North Anna Power Station Units I and 2Seismic Hazard and Screening ReportAppendix ATable A-Id: 2.5 Hz Seismic Hazard Curves at North AnnaMean 5i" Fractile 16"n Fractile 50'h Fractile 84t" Fractile 951f FractilePSA AEP PSA AEP PSA AEP PSA AEP PSA AEP PSA AEP((g) () (g) (g)0.2622 3.042E-05 0.1221 3.430E-05 0.1532 3.381E-05 0.2160 3.363E-05 0.3145 3.410E-05 0.4036 3.599E-05 0.2755 2.749E-05 0.1276 3.103E-05 0.1603 3.062E-05 0.2264 3.046E-05 0.3300 3.093E-05 0.4238 3.263E-05 0.2896 2.485E-05 0.1334 2.807E-05 0.1676 2.772E-05 0.2372 2.758E-05 0.3463 2.805E-05 0.4451 2.958E-05 0.3043 2.246E-05 0.1395 2.539E-05 0.1754 2.511E-05 0.2485 2.497E-05 0.3634 2.544E-05 0.4674 2.681E-05 0.3198 2.030E-05 0.1458 2.297E-05 0.1834 2.273E-05 0.2604 2.262E-05 0.3814 2.307E-05 0.4909 2.431E-05 0.3361 1.834E-05 0.1524 2.078E-05 0.1919 2.058E-05 0.2729 2.048E-05 0.4002 2.093E-05 0.5156 2.203E-05 0.3533 1.658E-05 0.1593 1.880E-05 0.2007 1.864E-05 0.2860 1.854E-05 0.4199 1.898E-05 0.5414 1.997E-05 0.3713 1.498E-05 0.1665 1.701E-05 0.2099 1.687E-05 0.2996 1.679E-05 0.4407 1.721E-05 0.5686 1.810E-05 0.3902 1.354E-05 0.1740 1.538E-05 0.2196 1.528E-05 0.3140 1.520E-05 0.4624 1.561E-05 0.5972 1.641E-05 0.4101 1.223E-05 0.1819 1.391E-05 0.2297 1.384E-05 0.3290 1.376E-05 0.4853 1.416E-05 0.6271 1.487E-05 0.4310 1.104E-05 0.1901 1.259E-05 0.2403 1.253E-05 0.3447 1.246E-05 0.5092 1.283E-05 0.6586 1.348E-05 0.4530 9.923E-06 0.1987 1.137E-05 0.2513 1.133E-05 0.3612 1.127E-05 0.5343 1.163E-05 0.6917 1.221E-05 0.4760 8.866E-06 0.2077 1.025E-05 0.2629 1.022E-05 0.3785 1.016E-05 0.5607 1.051E-05 0.7264 1.105E-05 0.5003 7.885E-06 0.2171 9.177E-06 0.2750 9.157E-06 0.3966 9.101E-06 0.5884 9.444E-06 0.7629 9.949E-06 0.5258 7.004E-06 0.2269 8.175E-06 0.2877 8.164E-06 0.4156 8.108E-06 0.6174 8.426E-06 0.8012 8.890E-06 0.5526 6.219E-06 0.2372 7.266E-06 0.3009 7.262E-06 0.4355 7.208E-06 0.6479 7.492E-06 0.8414 7.893E-06 0.5807 5.522E-06 0.2479 6.454E-06 0.3147 6.456E-06 0.4563 6.407E-06 0.6799 6.655E-06 0.8836 6.994E-06 0.6103 4.903E-06 0.2591 5.733E-06 0.3292 5.740E-06 0.4781 5.693E-06 0.7135 5.910E-06 0.9280 6.196E-06 0.6414 4.353E-06 0.2709 5.092E-06 0.3444 5.103E-06 0.5010 5.059E-06 0.7487 5.248E-06 0.9746 5.489E-06 0.6741 3.865E-06 0.2831 4.523E-06 0.3602 4.536E-06 0.5250 4.496E-06 0.7856 4.660E-06 1.0235 4.861 E-060.7085 3.432E-06 0.2959 4.017E-06 0.3768 4.032E-06 0.5501 3.995E-06 0.8244 4.138E-06 1.0749 4.306E-06 0.7446 3.046E-06 0.3093 3.567E-06 0.3942 3.584E-06 0.5764 3.550E-06 0.8651 3.674E-06 1.1288 3.814E-06 0.7825 2.704E-06 0.3233 3.168E-06 0.4123 3.186E-06 0.6040 3.154E-06 0.9078 3.262E-06 1.1855 3.378E-06 0.8224 2.400E-06 0.3379 2.813E-06 0.4313 2.831E-06 0.6329 2.802E-06 0.9526 2.895E-06 1.2450 2.992E-06 0.8643 2.130E-06 0.3532 2.498E-06 0.4511 2.517E-06 0.6631 2.490E-06 0.9997 2.570E-06 1.3075 2.649E-06 0.9084 1.890E-06 0.3692 2.218E-06 0.4719 2.236E-06 0.6949 2.211 E-06 1.0490 2.282E-06 1.3731 2.346E-06 0.9547 1.677E-06 0.3859 1.969E-06 0.4936 1.988E-06 0.7281 1.964E-06 1.1008 2.025E-06 1.4420 2.078E-06 1.0033 1.487E-06 0.4034 1.748E-06 0.5163 1.766E-06 0.7629 1.745E-06 1.1551 1.797E-06 1.5144 1.840E-06 1.0544 1.319E-06 0.4216 1.552E-06 0.5401 1.569E-06 0.7994 1.549E-06 1.2121 1.595E-06 1.5904 1.629E-06 1.1082 1.170E-06 0.4407 1.377E-06 0.5649 1.394E-06 0.8377 1.375E-06 1.2720 1.415E-06 1.6703 1.442E-06 1.1647 1.033E-06 0.4606 1.221E-06 0.5910 1.238E-06 0.8777 1.220E-06 1.3348 1.255E-06 1.7541 1.276E-06 1.2240 9.040E-07 0.4815 1.080E-06 0.6181 1.096E-06 0.9197 1.079E-06 1.4007 1.111 E-06 1.8422 1.128E-06 1.2864 7.851 E-07 0.5033 9.480E-07 0.6466 9.635E-07 0.9637 9.464E-07 1.4698 9.764E-07 1.9347 9.904E-07 1.3519 6.794E-07 0.5260 8.251E-07 0.6764 8.398E-07 1.0098 8.220E-07 1.5424 8.494E-07 2.0318 8.614E-07 1.4208 5.873E-07 0.5498 7.139E-07 0.7075 7.271E-07 1.0582 7.094E-07 1.6185 7.333E-07 2.1338 7.435E-07 1.4933 5.075E-07 0.5747 6.163E-07 0.7400 6.278E-07 1.1088 6.107E-07 1.6984 6.312E-07 2.2409 6.399E-07 1.5693 4.383E-07 0.6007 5.316E-07 0.7741 5.417E-07 1.1618 5.254E-07 1.7822 5.429E-07 2.3534 5.503E-07 1.6493 3.785E-07 0.6279 4.583E-07 0.8097 4.671E-07 1.2174 4.518E-07 1.8702 4.667E-07 2.4715 4.731 E-071.7334 3.265E-07 0.6563 3.949E-07 0.8470 4.026E-07 1.2756 3.883E-07 1.9625 4.011 E-07 2.5956 4.066E-07 1.8217 2.815E-07 0.6860 3.401E-07 0.8860 3.468E-07 1.3367 3.335E-07 2.0594 3.444E-07 2.7259 3.491E-07 1.9145 2.426E-07 0.7171 2.927E-07 0.9268 2.985E-07 1.4006 2.863E-07 2.1610 2.956E-07 2.8627 2.997E-07 A-11 North Anna Power Station Units 1 and 2Seismic Hazard and Screening ReportAppendix ATable A-ld: 2.5 Hz Seismic Hazard Curves at North AnnaMean 5"' Fractile 16"' Fractile 50"l Fractile 84"n Fractile 951f FractilePSA AEP PSA AEP PSA AEP PSA AEP PSA AEP PSA AEP(g) (g) (g) (g) (_)2.0121 2.088E-07 0.7495 2.518E-07 0.9694 2.568E-07 1.4676 2.456E-07 2.2677 2.535E-07 3.0064 2.570E-07 2.1147 1.796E-07 0.7834 2.163E-07 1.0140 2.206E-07 1.5378 2.105E-07 2.3797 2.173E-07 3.1573 2.202E-07 2.2224 1.543E-07 0.8189 1.856E-07 1.0607 1.894E-07 1.6114 1.801E-07 2.4971 1.859E-07 3.3158 1.885E-07 2.3357 1.323E-07 0.8559 1.591E-07 1.1095 1.625E-07 1.6885 1.540E-07 2.6204 1.589E-07 3.4823 1.611E-07 2.4547 1.132E-07 0.8947 1.362E-07 1.1606 1.391E-07 1.7693 1.315E-07 2.7497 1.357E-07 3.6571 1.376E-07 2.5798 9.631E-08 0.9351 1.162E-07 1.2140 1.188E-07 1.8539 1.119E-07 2.8855 1.155E-07 3.8407 1.172E-07 2.7113 8.104E-08 0.9775 9.860E-08 1.2699 1.008E-07 1.9426 9.454E-08 3.0279 9.766E-08 4.0335 9.907E-08 2.8494 6.737E-08 1.0217 8.251E-08 1.3283 8.453E-08 2.0355 7.881E-08 3.1774 8.147E-08 4.2359 8.269E-08 2.9947 5.552E-08 1.0679 6.799E-08 1.3895 6.968E-08 2.1329 6.475E-08 3.3342 6.690E-08 4.4486 6.790E-08 3.1473 4.543E-08 1.1162 5.534E-08 1.4534 5.665E-08 2.2349 5.267E-08 3.4988 5.430E-08 4.6719 5.505E-08 3.3077 3.690E-08 1.1667 4.464E-08 1.5203 4.561E-08 2.3419 4.250E-08 3.6715 4.369E-08 4.9064 4.423E-08 3.4762 2.968E-08 1.2195 3.568E-08 1.5903 3.637E-08 2.4539 3.398E-08 3.8528 3.482E-08 5.1527 3.520E-08 3.6534 2.357E-08 1.2747 2.818E-08 1.6635 2.867E-08 2.5713 2.684E-08 4.0429 2.742E-08 5.4114 2.767E-08 3.8395 1.840E-08 1.3324 2.192E-08 1.7400 2.224E-08 2.6943 2.087E-08 4.2425 2.124E-08 5.6830 2.139E-08 4.0352 1.403E-08 1.3927 1.668E-08 1.8201 1.688E-08 2.8232 1.586E-08 4.4519 1.608E-08 5.9683 1.616E-08 4.2409 1.032E-08 1.4557 1.230E-08 1.9039 1.242E-08 2.9583 1.166E-08 4.6717 1.177E-08 6.2679 1.180E-08 4.4570 7.196E-09 1.5216 8.642E-09 1.9915 8.692E-09 3.0998 8.143E-09 4.9023 8.170E-09 6.5825 8.171E-09 4.6841 4.554E-09 1.5904 5.592E-09 2.0832 5.595E-09 3.2481 5.206E-09 5.1443 5.175E-09 6.9130 5.150E-09 A-12 North Anna Power Station Units I and 2Seismic Hazard and Screening ReportAppendix ATable A-le: 6 Hz Seismic Hazard Curves at North AnnaMean 5" Fractile 16"' Fractile 50th Fractile 84"' Fractile 95"' FractilePSA AEP PSA AEP PSA AEP PSA AEP PSA AEP PSA AEP(g) (g) (g) (g) (g) (g)0.0613 1.062E-03 0.0348 1.061E-03 0.0417 1.061E-03 0.0568 1.061E-03 0.0809 1.061E-03 0.1034 1.063E-03 0.0643 1.051E-03 0.0365 1.050E-03 0.0437 1.050E-03 0.0595 1.050E-03 0.0848 1.050E-03 0.1084 1.053E-03 0.0676 1.033E-03 0.0382 1.031E-03 0.0457 1.032E-03 0.0624 1.032E-03 0.0888 1.034E-03 0.1137 1.036E-03 0.0709 1.008E-03 0.0400 1.006E-03 0.0479 1.007E-03 0.0654 1.009E-03 0.0931 1.011E-03 0.1191 1.013E-03 0.0745 9.736E-04 0.0419 9.725E-04 0.0502 9.737E-04 0.0685 9.762E-04 0.0976 9.792E-04 0.1249 9.805E-04 0.0782 9.323E-04 0.0438 9.317E-04 0.0526 9.333E-04 0.0718 9.369E-04 0.1023 9.408E-04 0.1309 9.413E-04 0.0821 8.849E-04 0.0459 8.849E-04 0.0551 8.867E-04 0.0753 8.914E-04 0.1072 8.963E-04 0.1373 8.956E-04 0.0862 8.333E-04 0.0481 8.338E-04 0.0577 8.359E-04 0.0789 8.417E-04 0.1124 8.471E-04 0.1439 8.452E-04 0.0905 7.799E-04 0.0503 7.806E-04 0.0604 7.831 E-04 0.0827 7.897E-04 0.1178 7.956E-04 0.1509 7.922E-04 0.0950 7.266E-04 0.0527 7.274E-04 0.0633 7.301E-04 0.0867 7.375E-04 0.1234 7.436E-04 0.1581 7.387E-04 0.0998 6.751E-04 0.0552 6.755E-04 0.0663 6.784E-04 0.0908 6.865E-04 0.1294 6.926E-04 0.1658 6.863E-04 0.1048 6.261E-04 0.0578 6.261E-04 0.0695 6.291E-04 0.0952 6.378E-04 0.1356 6.437E-04 0.1738 6.362E-04 0.1100 5.801E-04 0.0605 5.796E-04 0.0728 5.828E-04 0.0997 5.918E-04 0.1421 5.975E-04 0.1822 5.889E-04 0.1155 5.373E-04 0.0634 5.363E-04 0.0762 5.395E-04 0.1045 5.488E-04 0.1490 5.542E-04 0.1910 5.447E-04 0.1213 4.975E-04 0.0663 4.960E-04 0.0798 4.993E-04 0.1095 5.089E-04 0.1562 5.140E-04 0.2002 5.036E-04 0.1273 4.606E-04 0.0695 4.587E-04 0.0836 4.621E-04 0.1148 4.717E-04 0.1637 4.765E-04 0.2099 4.656E-04 0.1337 4.264E-04 0.0727 4.242E-04 0.0876 4.276E-04 0.1203 4.372E-04 0.1715 4.417E-04 0.2200 4.303E-04 0.1404 3.947E-04 0.0762 3.923E-04 0.0918 3.956E-04 0.1261 4.053E-04 0.1798 4.096E-04 0.2307 3.977E-04 0.1474 3.654E-04 0.0798 3.627E-04 0.0961 3.661E-04 0.1322 3.756E-04 0.1885 3.796E-04 0.2418 3.676E-04 0.1547 3.383E-04 0.0835 3.354E-04 0.1007 3.388E-04 0.1385 3.481E-04 0.1975 3.519E-04 0.2535 3.397E-04 0.1625 3.131E-04 0.0874 3.102E-04 0.1055 3.134E-04 0.1451 3.226E-04 0.2070 3.262E-04 0.2657 3.140E-04 0.1706 2.898E-04 0.0916 2.869E-04 0.1105 2.900E-04 0.1521 2.990E-04 0.2170 3.023E-04 0.2786 2.902E-04 0.1791 2.683E-04 0.0959 2.653E-04 0.1158 2.684E-04 0.1594 2.771E-04 0.2274 2.802E-04 0.2920 2.682E-04 0.1880 2.483E-04 0.1004 2.453E-04 0.1213 2.484E-04 0.1671 2.568E-04 0.2384 2.597E-04 0.3062 2.479E-04 0.1974 2.298E-04 0.1051 2.268E-04 0.1270 2.298E-04 0.1751 2.380E-04 0.2499 2.407E-04 0.3209 2.291E-04 0.2073 2.127E-04 0.1101 2.098E-04 0.1330 2.126E-04 0.1835 2.205E-04 0.2619 2.230E-04 0.3364 2.117E-04 0.2177 1.968E-04 0.1152 1.940E-04 0.1394 1.967E-04 0.1923 2.043E-04 0.2745 2.067E-04 0.3527 1.957E-04 0.2285 1.821E-04 0.1207 1.793E-04 0.1460 1.819E-04 0.2015 1.893E-04 0.2877 1.916E-04 0.3697 1.808E-04 0.2400 1.685E-04 0.1263 1.658E-04 0.1529 1.683E-04 0.2112 1.754E-04 0.3015 1.775E-04 0.3876 1.670E-04 0.2519 1.558E-04 0.1323 1.532E-04 0.1602 1.556E-04 0.2214 1.624E-04 0.3161 1.644E-04 0.4063 1.543E-04 0.2645 1.441E-04 0.1385 1.415E-04 0.1678 1.439E-04 0.2320 1.504E-04 0.3313 1.523E-04 0.4260 1.424E-04 0.2777 1.331E-04 0.1451 1.307E-04 0.1758 1.329E-04 0.2431 1.392E-04 0.3472 1.410E-04 0.4466 1.314E-04 0.2916 1.228E-04 0.1519 1.205E-04 0.1841 1.226E-04 0.2548 1.287E-04 0.3639 1.304E-04 0.4681 1.211E-04 0.3062 1.131E-04 0.1590 1.110E-04 0.1929 1.130E-04 0.2670 1.188E-04 0.3814 1.204E-04 0.4907 1.114E-04 0.3215 1 1.040E-04 1 0.1665 1 1.020E-04 1 0.2020 1 1.040E-04 1 0.27981.095E-04 1 0.39981.110E-04 1 0.51451.023E-04 0.3375 9.530E-05 0.1744 9.361E-05 0.2116 9.551E-05 0.2933 1.007E-04 0.4190 1.021 E-04 0.5393 9.367E-05 0.3544 8.712E-05 0.1826 8.572E-05 0.2217 8.755E-05 0.3074 9.242E-05 0.4392 9.355E-05 0.5654 8.559E-05 0.3721 7.942E-05 0.1912 7.834E-05 0.2322 8.008E-05 0.3221 8.457E-05 0.4603 8.552E-05 0.5927 7.801E-05 0.3907 7.222E-05 0.2002 7.147E-05 0.2433 7.313E-05 0.3376 7.722E-05 0.4825 7.796E-05 0.6213 7.097E-05 0.4102 6.555E-05 0.2096 6.512E-05 0.2548 6.669E-05 0.3538 7.035E-05 0.5057 7.089E-05 0.6514 6.445E-05 0.4307 5.941E-05 0.2195 5.928E-05 0.2669 6.075E-05 0.3708 6.399E-05 0.5300 6.432E-05 0.6828 5.847E-05 A-13 North Anna Power Station Units 1 and 2Seismic Hazard and Screening ReportAppendix ATable A-le: 5 Hz Seismic Hazard Curves at North AnnaMean 5t" Fractile 16t" Fractile 50th Fractile 84'h Fractile 95'h FractilePSA AEP PSA AEP PSA AEP PSA AEP PSA AEP PSA AEP(g) (g) (g) (g) (g) (g)0.4522 5.380E-05 0.2298 5.392E-05 0.2796 5.530E-05 0.3886 5.814E-05 0.5555 5.828E-05 0.7158 5.299E-05 0.4748 4.869E-05 0.2406 4.902E-05 0.2929 5.031E-05 0.4072 5.277E-05 0.5823 5.276E-05 0.7504 4.801E-05 0.4986 4.404E-05 0.2520 4.456E-05 0.3068 4.576E-05 0.4268 4.789E-05 0.6103 4.773E-05 0.7867 4.348E-05 0.5235 3.984E-05 0.2638 4.050E-05 0.3214 4.162E-05 0.4473 4.344E-05 0.6397 4.316E-05 0.8247 3.937E-05 0.5496 3.603E-05 0.2762 3.681 E-05 0.3367 3.785E-05 0.4688 3.940E-05 0.6705 3.902E-05 0.8645 3.565E-05 0.5771 3.259E-05 0.2893 3.345E-05 0.3527 3.442E-05 0.4913 3.574E-05 0.7027 3.528E-05 0.9063 3.228E-05 0.6059 2.948E-05 0.3029 3.040E-05 0.3694 3.130E-05 0.5148 3.241E-05 0.7366 3.189E-05 0.9501 2.923E-05 0.6362 2.666E-05 0.3171 2.762E-05 0.3870 2.846E-05 0.5396 2.939E-05 0.7720 2.883E-05 0.9960 2.647E-05 0.6679 2.411E-05 0.3321 2.510E-05 0.4054 2.588E-05 0.5655 2.665E-05 0.8092 2.606E-05 1.0441 2.396E-05 0.7013 2.180E-05 0.3477 2.281E-05 0.4246 2.353E-05 0.5926 2.417E-05 0.8481 2.356E-05 1.0945 2.169E-05 0.7364 1.971E-05 0.3641 2.072E-05 0.4448 2.139E-05 0.6211 2.192E-05 0.8889 2.130E-05 1.1474 1.964E-05 0.7731 1.782E-05 0.3812 1.883E-05 0.4659 1.945E-05 0.6509 1.987E-05 0.9317 1.924E-05 1.2029 1.777E-05 0.8118 1.610E-05 0.3992 1.710E-05 0.4881 1.768E-05 0.6821 1.801 E-05 0.9765 1.738E-05 1.2610 1.608E-05 0.8523 1.454E-05 0.4180 1.552E-05 0.5112 1.606E-05 0.7149 1.632E-05 1.0235 1.570E-05 1.3219 1.454E-05 0.8949 1.311E-05 0.4377 1.407E-05 0.5355 1.458E-05 0.7492 1.478E-05 1.0728 1.417E-05 1.3858 1.312E-05 0.9396 1.180E-05 0.4583 1.275E-05 0.5610 1.321E-05 0.7852 1.336E-05 1.1244 1.276E-05 1.4527 1.183E-05 0.9865 1.059E-05 0.4798 1.153E-05 0.5876 1.196E-05 0.8229 1.206E-05 1.1785 1.147E-05 1.5229 1.065E-05 1.0358 9.480E-06 0.5024 1.040E-05 0.6156 1.080E-05 0.8624 1.086E-05 1.2353 1.029E-05 1.5965 9.554E-06 1.0876 8.460E-06 0.5261 9.357E-06 0.6448 9.722E-06 0.9038 9.752E-06 1.2947 9.206E-06 1.6737 8.551 E-061.1419 7.527E-06 0.5509 8.397E-06 0.6754 8.728E-06 0.9472 8.730E-06 1.3570 8.211E-06 1.7545 7.632E-06 1.1990 6.677E-06 0.5768 7.515E-06 0.7075 7.811E-06 0.9927 7.790E-06 1.4223 7.304E-06 1.8393 6.796E-06 1.2589 5.911E-06 0.6040 6.710E-06 0.7412 6.971E-06 1.0403 6.931E-06 1.4908 6.480E-06 1.9282 6.038E-06 1.3217 5.223E-06 0.6324 5.978E-06 0.7764 6.205E-06 1.0903 6.152E-06 1.5625 5.736E-06 2.0213 5.357E-06 1.3878 4.610E-06 0.6622 5.318E-06 0.8133 5.513E-06 1.1426 5.448E-06 1.6377 5.071E-06 2.1190 4.747E-06 1.4571 4.066E-06 0.6934 4.726E-06 0.8519 4.892E-06 1.1975 4.819E-06 1.7165 4.477E-06 2.2214 4.204E-06 1.5299 3.584E-06 0.7260 4.197E-06 0.8924 4.336E-06 1.2550 4.257E-06 1.7991 3.950E-06 2.3287 3.720E-06 1.6063 3.159E-06 0.7602 3.726E-06 0.9348 3.841E-06 1.3152 3.760E-06 1.8857 3.484E-06 2.4412 3.292E-06 1.6866 2.783E-06 0.7960 3.306E-06 0.9792 3.402E-06 1.3784 3.319E-06 1.9765 3.072E-06 2.5592 2.913E-06 1.7708 2.452E-06 0.8335 2.934E-06 1.0257 3.012E-06 1.4445 2.929E-06 2.0716 2.708E-06 2.6828 2.577E-06 1,8593 2.160E-06 0.8728 2.602E-06 1.0744 2.666E-06 1.5139 2.585E-06 2.1713 2.386E-06 2.8125 2.279E-06 1,9522 1.901E-06 0.9139 2.308E-06 1.1255 2.360E-06 1.5866 2.280E-06 2.2758 2.102E-06 2.9483 2.015E-06 2,0497 1.672E-06 0.9569 2.046E-06 1.1790 2.087E-06 1.6627 2.010E-06 2.3853 1.851E-06 3.0908 1.780E-06 2,1521 1.469E-06 1.0019 1.813E-06 1.2350 1.846E-06 1.7426 1.771E-06 2.5001 1.629E-06 3.2401 1.572E-06 2,2596 1.290E-06 1.0491 1.604E-06 1.2937 1.631 E-06 1.8262 1.559E-06 2.6204 1.432E-06 3.3967 1.385E-06 2,3725 1.129E-06 1.0985 1.418E-06 1.3551 1.438E-06 1.9139 1.371E-06 2.7465 1.256E-06 3.5608 1.219E-06 2,4911 9.861E-07 1.1503 1.249E-06 1.4195 1.265E-06 2.0058 1.202E-06 2.8787 1.100E-06 3.7329 1.069E-06 2,6155 8.586E-07 1.2044 1.097E-06 1.4870 1.109E-06 2.1021 1.051E-06 3.0173 9.605E-07 3.9132 9.348E-07 2,7462 7.454E-07 1.2611 9.595E-07 1.5576 9.695E-07 2.2030 9.162E-07 3.1625 8.364E-07 4.1023 8.145E-07 2,8834 6.452E-07 1.3205 8.355E-07 1.6316 8.435E-07 2.3088 7.958E-07 3.3147 7.260E-07 4.3005 7.071E-07 3,0274 5.570E-07 1.3827 7.241E-07 1.7091 7.306E-07 2.4197 6.887E-07 3.4742 6.284E-07 4.5083 6.116E-07 3.1787 4.798E-07 1.4478 6.246E-07 1.7904 6.300E-07 2.5358 5.940E-07 3.6414 5.425E-07 4.7261 5.275E-07 A-14 North Anna Power Station Units I and 2Seismic Hazard and Screening ReportAppendix ATable A-le: 5 Hz Seismic Hazard Curves at North AnnaMean 5" Fractile 16t Fractile 50" Fractile 84'" Fractile 95"' FractilePSA AEP PSA AEP PSA AEP PSA AEP PSA AEP PSA AEP(q) (q) (g) (L) (g) (_)3.3375 4.126E-07 1.5160 5.365E-07 1.8754 5.410E-07 2.6576 5.108E-07 3.8167 4.673E-07 4.9545 4.538E-07 3.5042 3.543E-07 1.5874 4.592E-07 1.9645 4.631E-07 2.7852 4.382E-07 4.0003 4.018E-07 5.1938 3.896E-07 3.6792 3.039E-07 1.6621 3.919E-07 2.0579 3.952E-07 2.9189 3.752E-07 4.1929 3.450E-07 5.4448 3.340E-07 3.8631 2.604E-07 1.7404 3.337E-07 2.1556 3.366E-07 3.0590 3.207E-07 4.3946 2.959E-07 5.7079 2.859E-07 4.0560 2.228E-07 1.8224 2.836E-07 2.2581 2.861 E-07 3.2059 2.738E-07 4.6061 2.535E-07 5.9837 2.445E-07 4.2587 1.903E-07 1.9082 2.406E-07 2.3654 2.428E-07 3.3598 2.334E-07 4.8278 2.168E-07 6.2728 2.087E-07 4.4714 1.623E-07 1.9980 2.037E-07 2.4777 2.057E-07 3.5211 1.985E-07 5.0602 1.851E-07 6.5758 1.779E-07 4.6948 1.380E-07 2.0921 1.721 E-07 2.5955 1.739E-07 3.6902 1.685E-07 5.3037 1.576E-07 6.8936 1.511 E-074.9294 1.169E-07 2.1906 1.449E-07 2.7188 1.465E-07 3.8673 1.426E-07 5.5589 1.338E-07 7.2267 1.280E-07 5.1756 9.849E-08 2.2938 1.216E-07 2.8480 1.230E-07 4.0530 1.202E-07 5.8265 1.130E-07 7.5758 1.080E-07 5.4342 8.253E-08 2.4018 1.015E-07 2.9833 1.028E-07 4.2476 1.007E-07 6.1069 9.491E-08 7.9419 9.049E-08 5.7057 6.866E-08 2.5149 8.422E-08 3.1250 8.525E-08 4.4515 8.380E-08 6.4008 7.914E-08 8.3256 7.535E-08 5.9907 5.665E-08 2.6333 6.939E-08 3.2735 7.022E-08 4.6653 6.917E-08 6.7088 6.544E-08 8.7279 6.224E-08 6.2900 4.631E-08 2.7573 5.668E-08 3.4290 5.733E-08 4.8892 5.654E-08 7.0317 5.359E-08 9.1496 5.094E-08 6.6042 3.746E-08 2.8872 4.584E-08 3.5920 4.633E-08 5.1240 4.572E-08 7.3701 4.340E-08 9.5916 4.125E-08 6.9342 2.994E-08 3.0231 3.665E-08 3.7626 3.700E-08 5.3700 3.651E-08 7.7248 3.472E-08 10.0551 3.302E-08 7.2806 2.358E-08 3.1655 2.892E-08 3.9414 2.914E-08 5.6278 2.874E-08 8.0966 2.737E-08 10.5409 2.606E-08 7.6443 1.826E-08 3.3145 2.246E-08 4.1287 2.258E-08 5.8980 2.225E-08 8.4862 2.123E-08 11.0502 2.022E-08 A-15 North Anna Power Station Units 1 and 2Seismic Hazard and Screening ReportAppendix ATable A-If: 10 Hz Seismic Hazard Curves at North AnnaMean 5"f Fractile 16th Fractile 50t" Fractile 84th Fractile 95th FractilePSA AEP PSA AEP PSA AEP PSA AEP PSA AEP PSA AEP(Q) (g) (g) (g) (g) (g)0.0939 1.069E-03 0.0492 1.072E-03 0.0591 1.071E-03 0.0852 1.068E-03 0.1297 1.068E-03 0.1700 1.072E-03 0.0986 1.066E-03 0.0516 1.070E-03 0.0621 1.068E-03 0.0894 1.065E-03 0.1359 1.066E-03 0.1782 1.070E-03 0.1036 1.063E-03 0.0541 1.066E-03 0.0651 1.064E-03 0.0937 1.062E-03 0.1425 1.062E-03 0.1868 1.066E-03 0.1088 1.057E-03 0.0568 1.059E-03 0.0683 1.058E-03 0.0983 1.056E-03 0.1493 1.057E-03 0.1958 1.060E-03 0.1143 1.049E-03 0.0596 1.051E-03 0.0717 1.050E-03 0.1031 1.048E-03 0.1565 1.050E-03 0.2052 1.052E-03 0.1200 1.037E-03 0.0625 1.038E-03 0.0752 1.038E-03 0.1082 1.037E-03 0.1641 1.039E-03 0.2151 1.041E-03 0.1260 1.021E-03 0.0656 1.021E-03 0.0789 1.021E-03 0.1134 1;022E-03 0.1720 1.025E-03 0.2255 1.027E-03 0.1324 1.001E-03 0.0688 1.OOOE-03 0.0828 1.001E-03 0.1190 1.003E-03 0.1803 1.006E-03 0.2364 1.008E-03 0.1390 9.757E-04 0.0722 9.742E-04 0.0869 9.752E-04 0.1248 9.793E-04 0.1889 9.836E-04 0.2478 9.840E-04 0.1460 9.460E-04 0.0757 9.433E-04 0.0912 9.450E-04 0.1309 9.512E-04 0.1980 9.564E-04 0.2598 9.557E-04 0.1534 9.117E-04 0.0794 9.077E-04 0.0957 9.102E-04 0.1373 9.185E-04 0.2076 9.249E-04 0.2723 9.230E-04 0.1611 8.735E-04 0.0833 8.680E-04 0.1004 8.714E-04 0.1440 8.820E-04 0.2176 8.893E-04 0.2854 8.860E-04 0.1692 8.321E-04 0.0874 8.252E-04 0.1054 8.294E-04 0.1511 8.422E-04 0.2281 8.503E-04 0.2992 8.455E-04 0.1777 7.884E-04 0.0917 7.801E-04 0.1106 7.852E-04 0.1585 8.000E-04 0.2390 8.087E-04 0.3136 8.023E-04 0.1867 7.435E-04 0.0962 7.339E-04 0.1160 7.398E-04 0.1662 7.563E-04 0.2506 7.654E-04 0.3288 7.575E-04 0.1961 6.984E-04 0.1009 6.876E-04 0.1217 6.941E-04 0.1744 7.121E-04 0.2626 7.213E-04 0.3446 7.118E-04 0.2059 6.538E-04 0.1058 6.419E-04 0.1277 6.491E-04 0.1829 6.682E-04 0.2753 6.772E-04 0.3613 6.663E-04 0.2163 6.106E-04 0.1110 5.976E-04 0.1340 6.054E-04 0.1918 6.253E-04 0.2885 6.339E-04 0.3787 6.216E-04 0.2272 5.690E-04 0.1165 5.553E-04 0.1406 5.635E-04 0.2012 5.840E-04 0.3024 5.920E-04 0.3970 5.784E-04 0.2386 5.296E-04 0.1222 5.152E-04 0.1476 5.238E-04 0.2110 5.445E-04 0.3170 5.518E-04 0.4161 5.372E-04 0.2506 4.925E-04 0.1282 4.775E-04 0.1548 4.864E-04 0.2214 5.071E-04 0.3323 5.137E-04 0.4362 4.982E-04 0.2632 4.576E-04 0.1345 4.423E-04 0.1625 4.513E-04 0.2322 4.719E-04 0.3483 4.778E-04 0.4572 4.616E-04 0.2765 4.250E-04 0.1411 4.095E-04 0.1705 4.187E-04 0.2435 4.390E-04 0.3650 4.441E-04 0.4793 4.274E-04 0.2904 3.946E-04 0.1480 3.790E-04 0.1789 3.882E-04 0.2555 4.081E-04 0.3826 4.127E-04 0.5024 3.955E-04 0.3050 3.664E-04 0.1553 3.508E-04 0.1877 3.599E-04 0.2679 3.794E-04 0.4011 3.833E-04 0.5267 3.660E-04 0.3203 3.402E-04 0.1629 3.246E-04 0.1969 3.337E-04 0.2811 3.527E-04 0.4204 3.560E-04 0.5521 3.385E-04 0.3364 3.157E-04 0.1709 3.003E-04 0.2067 3.093E-04 0.2948 3.278E-04 0.4406 3.306E-04 0.5787 3.131E-04 0.3534 2.930E-04 0.1793 2.779E-04 0.2168 2.867E-04 0.3092 3.046E-04 0.4618 3.070E-04 0.6066 2.896E-04 0.3712 2.720E-04 0.1881 2.571E-04 0.2275 2.657E-04 0.3243 2.831E-04 0.4841 2.851E-04 0.6359 2.678E-04 0.3898 2.524E-04 0.1973 2.379E-04 0.2388 2.462E-04 0.3402 2.631E-04 0.5074 2.647E-04 0.6666 2.477E-04 0.4094 2.343E-04 0.2070 2.200E-04 0.2505 2.281 E-04 0.3568 2.445E-04 0.5319 2.458E-04 0.6987 2.291 E-040.4300 2.174E-04 0.2171 2.035E-04 0.2629 2.113E-04 0.3743 2.271E-04 0.5575 2.282E-04 0.7324 2.118E-04 0.4517 2.017E-04 0.2278 1.882E-04 0.2758 1.958E-04 0.3926 2.11OE-04 0.5843 2.119E-04 0.7678 1.958E-04 0.4744 1.872E-04 0.2389 1.740E-04 0.2894 1.813E-04 0.4118 1.960E-04 0.6125 1.966E-04 0.8048 1.810E-04 0.4983 1.736E-04 0.2507 1.608E-04 0.3037 1.679E-04 0.4319 1.820E-04 0.6420 1.824E-04 0.8437 1.672E-04 0.5234 1.609E-04 0.2630 1.485E-04 0.3187 1.553E-04 0.4530 1.690E-04 0.6729 1.692E-04 0.8844 1.544E-04 0.5497 1.491 E-04 0.2759 1.371 E-04 0.3344 1.437E-04 0.4752 1.567E-04 0.7053 1.569E-04 0.9270 1.424E-04 0.5773 1.379E-04 0.2894 1.264E-04 0.3509 1.328E-04 0.4984 1.454E-04 0.7393 1.453E-04 0.9717 1.313E-04 0.6064 1.275E-04 0.3036 1.165E-04 0.3682 1.227E-04 0.5228 1.346E-04 0.7749 1.345E-04 1.0186 1.209E-04 0.6369 1.177E-04 0.3185 1.073E-04 0.3863 1.132E-04 0.5484 1.246E-04 0.8122 1.243E-04 1.0678 1.111E-04 0.6690 1.085E-04 0.3341 9.862E-05 0.4054 1.043E-04 0.5752 1.151E-04 0.8513 1.147E-04 1.1193 1.020E-04 A-16 North Anna Power Station Units 1 and 2Seismic Hazard and Screening ReportAppendix ATable A-If: 10 Hz Seismic Hazard Curves at North AnnaMean 5"n Fractile 16'" Fractile 50" Fractile 84 " Fractile 951" FractilePSA AEP PSA AEP PSA AEP PSA AEP PSA AEP PSA AEP)() (g) (g) (g_ (g)0.7026 9.979E-05 0.3505 9.057E-05 0.4253 9.598E-05 0.6033 1.062E-04 0.8923 1.057E-04 1.1733 9.346E-05 0.7380 9.162E-05 0.3677 8.308E-05 0.4463 8.822E-05 0.6328 9.778E-05 0.9353 9.714E-05 1.2299 8.548E-05 0.7751 8.393E-05 0.3857 7.610E-05 0.4683 8.097E-05 0.6638 8.986E-05 0.9803 8.911E-05 1.2892 7.803E-05 0.8141 7.672E-05 0.4047 6.964E-05 0.4914 7.422E-05 0.6962 8.241E-05 1.0276 8.157E-05 1.3514 7.11OE-05 0.8551 6.999E-05 0.4245 6.366E-05 0.5156 6.795E-05 0.7303 7.543E-05 1.0771 7.449E-05 1.4166 6.468E-05 0.8981 6.373E-05 0.4453 5.813E-05 0.5410 6.214E-05 0.7660 6.891E-05 1.1289 6.790E-05 1.4850 5.874E-05 0.9433 5.793E-05 0.4672 5.305E-05 0.5677 5.677E-05 0.8035 6.284E-05 1.1833 6.176E-05 1.5566 5.328E-05 0.9907 5.258E-05 0.4901 4.838E-05 0.5957 5.182E-05 0.8428 5.722E-05 1.2403 5.608E-05 1.6317 4.827E-05 1.0406 4.768E-05 0.5141 4.410E-05 0.6251 4.728E-05 0.8840 5.203E-05 1.3000 5.086E-05 1.7104 4.370E-05 1.0929 4.319E-05 0.5394 4.019E-05 0.6559 4.312E-05 0.9272 4.727E-05 1.3627 4.607E-05 1.7930 3.953E-05 1.1479 3.911E-05 0.5658 3.661E-05 0.6882 3.931E-05 0.9726 4.291E-05 1.4283 4.169E-05 1.8795 3.574E-05 1.2057 3.539E-05 0.5936 3.335E-05 0.7221 3.583E-05 1.0201 3.893E-05 1.4971 3.770E-05 1.9701 3.231E-05 1.2663 3.202E-05 0.6227 3.037E-05 0.7577 3.265E-05 1.0700 3.530E-05 1.5692 3.407E-05 2.0652 2.919E-05 1.3301 2.896E-05 0.6533 2.766E-05 0.7951 2.975E-05 1.1223 3.200E-05 1.6448 3.078E-05 2.1648 2.637E-05 1.3970 2.619E-05 0.6853 2.518E-05 0.8343 2.710E-05 1.1772 2.900E-05 1.7240 2.780E-05 2.2693 2.382E-05 1.4673 2.368E-05 0.7189 2.292E-05 0.8754 2.469E-05 1.2348 2.628E-05 1.8070 2.51OE-05 2.3787 2.150E-05 1.5411 2.140E-05 0.7542 2.086E-05 0.9186 2.249E-05 1.2952 2.381E-05 1.8941 2.266E-05 2.4935 1.940E-05 1.6186 1.933E-05 0.7912 1.898E-05 0.9639 2.047E-05 1.3585 2.156E-05 1.9853 2.044E-05 2.6138 1.751 E-051.7001 1.745E-05 0.8300 1.726E-05 1.0114 1.863E-05 1.4250 1.952E-05 2.0809 1.844E-05 2.7399 1.578E-05 1.7856 1.575E-05 0.8707 1.568E-05 1.0612 1.694E-05 1.4946 1.765E-05 2.1812 1.661E-05 2.8721 1.421E-05 1.8755 1.419E-05 0.9135 1.423E-05 1.1135 1.539E-05 1.5677 1.596E-05 2.2862 1.496E-05 3.0107 1.279E-05 1.9698 1.277E-05 0.9583 1.290E-05 1.1684 1.397E-05 1.6444 1.442E-05 2.3963 1.346E-05 3.1559 1.149E-05 2.0689 1.148E-05 1.0053 1.168E-05 1.2260 1.265E-05 1.7248 1.300E-05 2.5118 1.209E-05 3.3082 1.031E-05 2.1730 1.030E-05 1.0546 1.056E-05 1.2865 1.144E-05 1.8092 1.171E-05 2.6327 1.084E-05 3.4678 9.231E-06 2.2824 9.215E-06 1.1064 9.519E-06 1.3499 1.033E-05 1.8977 1.052E-05 2.7595 9.702E-06 3.6351 8.253E-06 2.3972 8.232E-06 1.1606 8.567E-06 1.4165 9.292E-06 1.9905 9.432E-06 2.8925 8.668E-06 3.8104 7.366E-06 2.5178 7.336E-06 1.2176 7.693E-06 1.4863 8.343E-06 2.0878 8.440E-06 3.0318 7.729E-06 3.9943 6.563E-06 2.6445 6.524E-06 1.2773 6.893E-06 1.5596 7.470E-06 2.1899 7.535E-06 3.1778 6.878E-06 4.1870 5.837E-06 2.7776 5.790E-06 1.3400 6.164E-06 1.6364 6.671E-06 2.2970 6.712E-06 3.3309 6.108E-06 4.3890 5.184E-06 2.9173 5.130E-06 1.4057 5.501E-06 1.7171 5.943E-06 2.4093 5.965E-06 3.4913 5.415E-06 4.6007 4.598E-06 3.0641 4.537E-06 1.4747 4.902E-06 1.8018 5.282E-06 2.5272 5.291E-06 3.6595 4.792E-06 4.8227 4.073E-06 3.2183 4.007E-06 1.5470 4.361 E-06 1.8906 4.685E-06 2.6507 4.684E-06 3.8357 4.235E-06 5.0554 3.605E-06 3.3802 3.535E-06 1.6229 3.876E-06 1.9838 4.149E-06 2.7804 4.141E-06 4.0205 3.738E-06 5.2993 3.188E-06 3.5503 3.116E-06 1.7025 3.442E-06 2.0816 3.669E-06 2.9164 3.656E-06 4.2141 3.296E-06 5.5549 2.817E-06 3.7289 2.744E-06 1.7861 3.053E-06 2.1842 3.240E-06 3.0590 3.224E-06 4.4171 2.903E-06 5.8229 2.487E-06 3.9165 2.415E-06 1.8737 2.707E-06 2.2919 2.859E-06 3.2086 2.841E-06 4.6299 2.555E-06 6.1039 2.194E-06 4.1136 2.123E-06 1.9656 2.398E-06 2.4049 2.520E-06 3.3655 2.501E-06 4.8529 2.247E-06 6.3983 1.935E-06 4.3206 1.865E-06 2.0621 2.122E-06 2.5234 2.220E-06 3.5301 2.199E-06 5.0866 1.974E-06 6.7070 1.704E-06 4.5380 1.636E-06 2.1632 1.877E-06 2.6478 1.953E-06 3.7027 1.933E-06 5.3316 1.733E-06 7.0306 1.498E-06 4.7663 1.434E-06 2.2693 1.658E-06 2.7783 1.716E-06 3.8838 1.696E-06 5.5884 1.519E-06 7.3698 1.316E-06 5.0061 1.254E-06 2.3807 1.461E-06 2.9153 1.506E-06 4.0737 1.486E-06 5.8576 1.330E-06 7.7254 1.153E-06 A-17 North Anna Power Station Units 1 and 2Seismic Hazard and Screening ReportAppendix ATable A-If: 10 Hz Seismic Hazard Curves at North AnnaMean 5"n Fractile 16"n Fractile 50l" Fractile 84t' Fractile 95"n FractilePSA AEP PSA AEP PSA AEP PSA AEP PSA AEP PSA AEP(g) (g) (g) (g) (g) (g)5.2580 1.094E-06 2.4975 1.286E-06 3.0590 1.320E-06 4.2729 1.301E-06 6.1397 1.162E-06 8.0981 1.008E-06 5.5226 9.531E-07 2.6200 1.129E-06 3.2098 1.154E-06 4.4819 1.136E-06 6.4354 1.014E-06 8.4888 8.796E-07 5.8004 8.279E-07 2.7485 9.891E-07 3.3681 1.006E-06 4.7011 9.895E-07 6.7454 8.819E-07 8.8983 7.654E-07 6.0923 7.172E-07 2.8834 8.636E-07 3.5341 8.754E-07 4.9310 8.598E-07 7.0703 7.656E-07 9.3276 6.642E-07 6.3988 6.195E-07 3.0248 7.518E-07 3.7083 7.593E-07 5.1721 7.451E-07 7.4108 6.631E-07 9.7776 5.748E-07 6.7208 5.337E-07 3.1732 6.522E-07 3.8912 6.566E-07 5.4251 6.439E-07 7.7678 5.728E-07 10.2493 4.960E-07 7.0589 4.586E-07 3.3289 5.640E-07 4.0830 5.661E-07 5.6904 5.549E-07 8.1419 4.936E-07 10.7438 4.270E-07 7.4141 3.930E-07 3.4922 4.861 E-07 4.2843 4.866E-07 5.9687 4.769E-07 8.5341 4.243E-07 11.2622 3.666E-07 7.7871 3.359E-07 3.6636 4.176E-07 4.4955 4.170E-07 6.2606 4.087E-07 8.9451 3.638E-07 11.8055 3.141E-07 8.1790 2.865E-07 3.8433 3.577E-07 4.7171 3.564E-07 6.5667 3.493E-07 9.3760 3.113E-07 12.3751 2.684E-07 8.5905 2.438E-07 4.0319 3.055E-07 4.9496 3.037E-07 6.8879 2.978E-07 9.8276 2.657E-07 12.9721 2.289E-07 9.0227 2.070E-07 4.2297 2.602E-07 5.1936 2.581E-07 7.2247 2.533E-07 10.3009 2.263E-07 13.5980 1.948E-07 9.4767 1.753E-07 4.4372 2.209E-07 5.4497 2.187E-07 7.5781 2.148E-07 10.7971 1.923E-07 14.2540 1.654E-07 9.9535 1.480E-07 4.6549 1.870E-07 5.7183 1.848E-07 7.9487 1.817E-07 11.3171 1.629E-07 14.9417 1.400E-07 10.4543 1.245E-07 4.8832 1.577E-07 6.0002 1.556E-07 8.3374 1.531E-07 11.8622 1.376E-07 15.6625 1.182E-07 10.9803 1.044E-07 5.1228 1.325E-07 6.2960 1.306E-07 8.7451 1.286E-07 12.4336 1.158E-07 16.4182 9.946E-08 11.5328 8.709E-08 5.3741 1.108E-07 6.6064 1.090E-07 9.1728 1.074E-07 13.0325 9.703E-08 17.2103 8.332E-08 12.1131 7.227E-08 5.6378 9.214E-08 6.9321 9.053E-08 9.6214 8.931E-08 13.6602 8.090E-08 18.0406 6.950E-08 A-18 North Anna Power Station Units 1 and 2Seismic Hazard and Screening ReportAppendix ATable A-1: 25 Hz Seismic Hazard Curves at North AnnaMean 5t' Fractile 16"n Fractile 50"t Fractile 84'" Fractile 95"' FractilePSA AEP PSA AEP PSA AEP PSA AEP PSA AEP PSA AEP(g) (g) (g) (g) (g) (g)0.1066 1.067E-03 0.0504 1.072E-03 0.0613 1.069E-03 0.0934 1.066E-03 0.1544 1.068E-03 0.2076 1.071E-03 0.1122 1.064E-03 0.0530 1.068E-03 0.0645 1.065E-03 0.0982 1.063E-03 0.1622 1.064E-03 0.2182 1.066E-03 0.1181 1.058E-03 0.0558 1.063E-03 0.0679 1.060E-03 0.1033 1.057E-03 0.1704 1.057E-03 0.2293 1.059E-03 0.1243 1.047E-03 0.0587 1.053E-03 0.0714 1.050E-03 0.1086 1.047E-03 0.1790 1.047E-03 0.2410 1.047E-03 0.1309 1.032E-03 0.0617 1.038E-03 0.0752 1.036E-03 0.1142 1.033E-03 0.1880 1.032E-03 0.2533 1.030E-03 0.1378 1.011E-03 0.0649 1.015E-03 0.0791 1.014E-03 0.1201 1.013E-03 0.1974 1.011E-03 0.2662 1.008E-03 0.1451 9.823E-04 0.0683 9.844E-04 0.0832 9.847E-04 0.1263 9.862E-04 0.2074 9.835E-04 0.2797 9.788E-04 0.1527 9.474E-04 0.0719 9.460E-04 0.0876 9.484E-04 0.1328 9.529E-04 0.2178 9.503E-04 0.2940 9.435E-04 0.1608 9.064E-04 0.0756 9.011E-04 0.0921 9.060E-04 0.1397 9.135E-04 0.2288 9.113E-04 0.3089 9.022E-04 0.1692 8.608E-04 0.0796 8.515E-04 0.0970 8.589E-04 0.1469 8.694E-04 0.2404 8.676E-04 0.3247 8.564E-04 0.1782 8.123E-04 0.0837 7.995E-04 0.1020 8.093E-04 0.1544 8.222E-04 0.2525 8.206E-04 0.3412 8.073E-04 0.1876 7.625E-04 0.0881 7.473E-04 0.1074 7.590E-04 0.1624 7.736E-04 0.2652 7.719E-04 0.3586 7.565E-04 0.1974 7.130E-04 0.0927 6.963E-04 0.1130 7.097E-04 0.1708 7.249E-04 0.2786 7.228E-04 0.3768 7.056E-04 0.2079 6.651E-04 0.0975 6.477E-04 0.1189 6.622E-04 0.1796 6.774E-04 0.2926 6.746E-04 0.3960 6.558E-04 0.2188 6.193E-04 0.1026 6.018E-04 0.1251 6.171E-04 0.1888 6.319E-04 0.3073 6.282E-04 0.4162 6.079E-04 0.2304 5.761E-04 0.1080 5.590E-04 0.1316 5.748E-04 0.1986 5.888E-04 0.3228 5.842E-04 0.4374 5.626E-04 0.2425 5.356E-04 0.1136 5.190E-04 0.1385 5.352E-04 0.2088 5.483E-04 0.3391 5.427E-04 0.4597 5.201E-04 0.2553 4.979E-04 0.1195 4.819E-04 0.1457 4.981E-04 0.2196 5.105E-04 0.3562 5.039E-04 0.4831 4.805E-04 0.2688 4.629E-04 0.1258 4.474E-04 0.1533 4.635E-04 0.2309 4.752E-04 0.3741 4.677E-04 0.5077 4.438E-04 0.2829 4.302E-04 0.1323 4.153E-04 0.1613 4.313E-04 0.2428 4.423E-04 0.3930 4.340E-04 0.5335 4.099E-04 0.2979 3.999E-04 0.1392 3.855E-04 0.1698 4.011E-04 0.2553 4.117E-04 0.4128 4.027E-04 0.5607 3.785E-04 0.3136 3.717E-04 0.1465 3.577E-04 0.1786 3.730E-04 0.2685 3.832E-04 0.4336 3.736E-04 0.5892 3.495E-04 0.3301 3.455E-04 0.1541 3.319E-04 0.1879 3.467E-04 0.2823 3.567E-04 0.4555 3.467E-04 0.6192 3.227E-04 0.3475 3.211E-04 0.1622 3.079E-04 0.1978 3.223E-04 0.2969 3.320E-04 0.4784 3.217E-04 0.6508 2.980E-04 0.3658 2.985E-04 0.1706 2.855E-04 0.2081 2.996E-04 0.3122 3.091E-04 0.5025 2.984E-04 0.6839 2.751E-04 0.3851 2.774E-04 0.1795 2.647E-04 0.2190 2.784E-04 0.3283 2.877E-04 0.5278 2.769E-04 0.7187 2.541E-04 0.4054 2.578E-04 0.1889 2.453E-04 0.2304 2.588E-04 0.3452 2.678E-04 0.5544 2.569E-04 0.7553 2.346E-04 0.4268 2.396E-04 0.1987 2.274E-04 0.2424 2.405E-04 0.3630 2.493E-04 0.5824 2.384E-04 0.7938 2.166E-04 0.4493 2.226E-04 0.2091 2.107E-04 0.2551 2.236E-04 0.3817 2.320E-04 0.6117 2.212E-04 0.8342 2.600E-04 0.4730 2.069E-04 0.2200 1.953E-04 0.2684 2.078E-04 0.4014 2.159E-04 0.6426 2.052E-04 0.8767 1.846E-04 0.4980 1.923E-04 0.2315 1.810E-04 0.2824 1.931E-04 0.4221 2.010E-04 0.6750 1.903E-04 0.9214 1.704E-04 0.5242 1.786E-04 0.2435 1.676E-04 0.2972 1.795E-04 0.4439 1.870E-04 0.7090 1.765E-04 0.9683 1 .572E-040.5519 1.659E-04 0.2562 1.553E-04 0.3127 1.668E-04 0.4668 1.740E-04 0.7447 1.637E-04 1.0176 1.449E-04 0.5810 1.540E-04 0.2696 1.438E-04 0.3291 1.549E-04 0.4908 1.618E-04 0.7822 1.517E-04 1.0694 1.334E-04 0.6116 1.429E-04 0.2837 1.331E-04 0.3462 1.439E-04 0.5161 1.504E-04 0.8217 1.404E-04 1.1239 1.228E-04 0.6439 1.324E-04 0.2984 1.231E-04 0.3643 1.335E-04 0.5427 1.398E-04 0.8631 1.299E-04 1.1811 1.127E-04 0.6779 1.226E-04 0.3140 1.137E-04 0.3834 1.238E-04 0.5707 1.297E-04 0.9066 1.200E-04 1.2412 1.033E-04 0.7136 1.133E-04 0.3304 1.050E-04 0.4034 1.146E-04 0.6001 1.203E-04 0.9522 1.106E-04 1.3044 9.450E-05 A-19 North Anna Power Station Units 1 and 2Seismic Hazard and Screening ReportAppendix ATable A-Ig: 25 Hz Seismic Hazard Curves at North AnnaMean 5"f Fractile 16tn Fractile 501h Fractile 84"n Fractile 95 Ih FractilePSA AEP PSA AEP PSA AEP PSA AEP PSA AEP PSA AEP(g) (g) (g) (g) (g) (g)0.7512 1.044E-04 0.3476 9.676E-05 0.4244 1.059E-04 0.6311 1.113E-04 1.0002 1.017E-04 1.3709 8.624E-05 0.7909 9.592E-05 0.3657 8.907E-05 0.4466 9.772E-05 0.6636 1.027E-04 1.0506 9.329E-05 1.4407 7.851 E-050.8326 8.792E-05 0.3848 8.188E-05 0.4699 9.001E-05 0.6978 9.463E-05 1.1036 8.538E-05 1.5140 7.133E-05 0.8765 8.036E-05 0.4049 7.517E-05 0.4945 8.274E-05 0.7338 8.696E-05 1.1592 7.793E-05 1.5911 6.467E-05 0.9227 7.324E-05 0.4260 6.892E-05 0.5203 7.593E-05 0.7717 7.970E-05 1.2176 7.096E-05 1.6721 5.854E-05 0.9714 6.660E-05 0.4482 6.314E-05 0.5475 6.957E-05 0.8114 7.288E-05 1.2790 6.447E-05 1.7573 5.293E-05 1.0226 6.043E-05 0.4716 5.781E-05 0.5761 6.367E-05 0.8533 6.650E-05 1.3434 5.847E-05 1.8468 4.781E-05 1.0765 5.476E-05 0.4962 5.290E-05 0.6062 5.820E-05 0.8973 6.058E-05 1.4112 5.296E-05 1.9408 4.315E-05 1.1333 4.955E-05 0.5220 4.839E-05 0.6378 5.317E-05 0.9435 5.511E-05 1.4823 4.791E-05 2.0396 3.893E-05 1.1931 4.481E-05 0.5493 4.426E-05 0.6712 4.855E-05 0.9922 5.009E-05 1.5570 4.331E-05 2.1435 3.511E-05 1.2560 4.050E-05 0.5779 4.048E-05 0.7062 4.431E-05 1.0433 4.550E-05 1.6354 3.914E-05 2.2527 3.167E-05 1.3222 3.659E-05 0.6081 3.702E-05 0.7431 4.044E-05 1.0971 4.131E-05 1.7179 3.535E-05 2.3674 2.855E-05 1.3919 3.306E-05 0.6398 3.385E-05 0.7819 3.690E-05 1.1537 3.750E-05 1.8044 3.193E-05 2.4879 2.574E-05 1.4654 2.986E-05 0.6731 3.096E-05 0.8228 3.367E-05 1.2132 3.403E-05 1.8954 2.883E-05 2.6146 2.321E-05 1.5426 2.697E-05 0.7082 2.831 E-05 0.8657 3.072E-05 1.2757 3.088E-05 1.9909 2.603E-05 2.7478 2.091 E-051.6240 2.436E-05 0.7452 2.588E-05 0.9109 2.803E-05 1.3415 2.803E-05 2.0912 2.351E-05 2.8877 1.884E-05 1.7096 2.199E-05 0.7840 2.367E-05 0.9585 2.557E-05 1.4107 2.543E-05 2.1966 2.122E-05 3.0347 1.697E-05 1.7998 1.986E-05 0.8249 2.164E-05 1.0086 2.333E-05 1.4834 2.307E-05 2.3073 1.914E-05 3.1893 1.526E-05 1,8947 1,792E-05 0U8679 1.978E-05 1.0613 2,128E-05 1.5599 2.093E-05 2.4236 1,726E-05 313517 1,372E-05 1.9946 1.616E-05 0.9132 1.807E-05 1.1167 1.940E-05 1.6403 1.898E-05 2.5457 1.556E-05 3.5223 1.231E-05 2.0998 1.456E-05 0.9608 1.650E-05 1.1750 1.768E-05 1.7249 1.720E-05 2.6740 1.400E-05 3.7017 1.103E-05 2.2106 1.309E-05 1.0109 1.505E-05 1.2364 1.611E-05 1.8139 1.557E-05 2.8088 1.259E-05 3.8902 9.851E-06 2.3272 1.176E-05 1.0636 1.371E-05 1.3010 1.465E-05 1.9074 1.408E-05 2.9504 1.130E-05 4.0883 8.783E-06 2.4499 1.054E-05 1.1191 1.247E-05 1.3689 1.331E-05 2.0057 1.271E-05 3.0990 1.011E-05 4.2965 7.812E-06 2.5791 9.412E-06 1.1775 1.131E-05 1.4404 1.206E-05 2.1091 1.144E-05 3.2552 9.034E-06 4.5153 6.931E-06 2.7151 8.388E-06 1.2389 1.023E-05 1.5157 1.091E-05 2.2179 1.028E-05 3.4193 8.051E-06 4.7452 6.135E-06 2.8583 7.454E-06 1.3035 9.213E-06 1.5949 9.822E-06 2.3322 9.199E-06 3.5916 7.157E-06 4.9868 5.419E-06 3.0090 6.606E-06 1.3714 8.272E-06 1.6782 8.818E-06 2.4525 8.209E-06 3.7726 6.348E-06 5.2407 4.779E-06 3.1677 5.840E-06 1.4430 7.400E-06 1.7658 7.888E-06 2.5789 7.300E-06 3.9627 5.618E-06 5.5076 4.209E-06 3.3348 5.153E-06 1.5182 6.597E-06 1.8580 7.030E-06 2.7119 6.472E-06 4.1624 4.963E-06 5.7881 3.703E-06 3.5107 4.538E-06 1.5974 5.862E-06 1.9551 6.244E-06 2.8517 5.720E-06 4.3722 4.379E-06 6.0828 3.255E-06 3.6958 3.993E-06 1.6807 5.196E-06 2.0572 5.530E-06 2.9987 5.044E-06 4.5926 3.859E-06 6.3926 2.860E-06 3.8907 3.509E-06 1.7683 4.596E-06 2.1647 4.885E-06 3.1534 4.438E-06 4.8240 3.397E-06 6.7181 2.511E-06 4.0959 3.082E-06 1.8605 4.059E-06 2.2777 4.307E-06 3.3159 3.899E-06 5.0671 2.989E-06 7.0602 2.204E-06 4.3119 2.705E-06 1.9576 3.580E-06 2.3967 3.792E-06 3.4869 3.422E-06 5.3225 2.627E-06 7.4197 1.933E-06 4.5393 2.373E-06 2.0596 3.156E-06 2.5219 3.335E-06 3.6667 3.001E-06 5.5907 2.309E-06 7.7975 1.694E-06 4.7787 2.080E-06 2.1671 2.780E-06 2.6536 2.931E-06 3.8558 2.629E-06 5.8725 2.027E-06 8.1946 1.484E-06 5.0308 1.822E-06 2.2801 2.447E-06 2.7922 2.574E-06 4.0546 2.302E-06 6.1684 1.778E-06 8.6119 1.297E-06 A-20 North Anna Power Station Units I and 2Seismic Hazard and Screening ReportAppendix ATable A-Ig: 25 Hz Seismic Hazard Curves at North AnnaMean 5th Fractile 16th Fractile 50ht Fractile 84"n Fractile 95th FractilePSA AEP PSA AEP PSA AEP PSA AEP PSA AEP PSA AEP(g) (g) (9) (g) (g) (g)5.2961 1.594E-06 2.3990 2.153E-06 2.9380 2.258E-06 4.2636 2.014E-06 6.4793 1.557E-06 9.0504 1.132E-06 5.5754 1.392E-06 2.5241 1.892E-06 3.0915 1.981E-06 4.4834 1.760E-06 6.8058 1.362E-06 9.5113 9.859E-07 5.8694 1.213E-06 2.6557 1.661E-06 3.2530 1.735E-06 4.7146 1.536E-06 7.1488 1.188E-06 9.9956 8.569E-07 6.1789 1.055E-06 2.7942 1.456E-06 3.4229 1.517E-06 4.9577 1.339E-06 7.5091 1.034E-06 10.5046 7.430E-07 6.5048 9.143E-07 2.9399 1.273E-06 3.6017 1.324E-06 5.2133 1.164E-06 7.8875 8.963E-07 11.0395 6.427E-07 6.8479 7.900E-07 3.0932 1.11OE-06 3.7898 1.152E-06 5.4821 1.009E-06 8.2850 7.748E-07 11.6017 5.546E-07 7.2090 6.804E-07 3.2545 9.639E-07 3.9877 9.989E-07 5.7647 8.722E-07 8.7026 6.674E-07 12.1924 4.775E-07 7.5892 5.841E-07 3.4242 8.342E-07 4.1960 8.634E-07 6.0620 7.515E-07 9.1411 5.729E-07 12.8133 4.104E-07 7.9894 4.999E-07 3.6028 7.191E-07 4.4152 7.433E-07 6.3745 6.454E-07 9.6018 4.902E-07 13.4658 3.520E-07 8.4108 4.265E-07 3.7907 6.173E-07 4.6458 6.372E-07 6.7032 5.524E-07 10.0857 4.181E-07 14.1515 3.015E-07 8.8544 3.631E-07 3.9884 5.277E-07 4.8885 5.442E-07 7.0488 4.714E-07 10.5940 3.556E-07 14.8721 2.579E-07 9.3213 3.084E-07 4.1964 4.495E-07 5.1438 4.629E-07 7.4122 4.012E-07 11.1279 3.018E-07 15.6294 2.203E-07 9.8129 2.614E-07 4.4152 3.816E-07 5.4125 3.924E-07 7.7944 3.405E-07 11.6887 2.556E-07 16.4253 1.878E-07 10.3304 2.211E-07 4.6455 3.229E-07 5.6952 3.316E-07 8.1963 2.883E-07 12.2778 2.160E-07 17.2617 1.600E-07 10.8752 1.866E-07 4.8877 2.725E-07 5.9927 2.794E-07 8.6189 2.435E-07 12.8965 1.821E-07 18.1407 1.360E-07 11.4488 1.572E-07 5.1426 2.293E-07 6.3057 2.347E-07 9.0633 2.052E-07 13.5465 1.533E-07 19.0645 1.154E-07 12.0526 1.319E-07 5.4108 1.923E-07 6.6350 1.967E-07 9.5306 1.724E-07 14.2292 1.286E-07 20.0353 9.763E-08 12.6882 1.104E-07 5.6929 1.607E-07 6.9816 1.641E-07 10.0220 1.443E-07 14.9463 1.077E-07 21.0555 8.240E-08 13.3574 9.201E-08 5.9898 1.338E-07 7.3462 1.364E-07 10.5387 1.203E-07 15.6995 8.981E-08 22.1277 6.930E-08 14.0618 7.630E-08 6.3022 1.107E-07 7.7300 1.128E-07 11.0820 9.976E-08 16.4907 7.461E-08 23.2545 5.805E-08 14.8034 6.290E-08 6.6308 9.106E-08 8.1337 9.262E-08 11.6534 8.222E-08 17.3218 6.169E-08 24.4387 4.839E-08 15.5841 5.149E-08 6.9766 7.430E-08 8.5585 7.550E-08 12.2543 6.725E-08 18.1948 5.071E-08 25.6831 4.010E-08 16.4060 4.180E-08 7.3405 6.007E-08 9.0056 6.097E-08 12.8861 5.453E-08 19.1117 4.139E-08 26.9910 3.299E-08 17.2712 3.360E-08 7.7233 4.804E-08 9.4760 4.871E-08 13.5505 4.376E-08 20.0749 3.351E-08 28.3654 2.691E-08 A-21 North Anna Power Station Units I and 2Seismic Hazard and Screening ReportAppendix ATable A-2a: Computed median and logarithmic standard deviation of the site amplification at frequencies of 0.5, 1.0, 2.5, 5.0, 10, 25, and 100 Hz for the single-corner seismological modelFrequency 0.55Hz<.

1.0 Hz. " 2.5Hz. 5.0 ZMotion Iput PSA Input PSA Input PSA "InpLt PSA M oName M dian Log-S.D Median Log-SD Median Log-SD Median Log-SDNa e[g] ,.[g] '[g] ."[g] G001 7.04E-03 1.01 E+00 6.04E-03 1.28E-02 1.01E+00 1.06E-02 2.05E-02 1.05E+00 3.97E-02 2.38E-02 1.20E+00 1.43E-01G005 1.46E-02 1.02E+00 1.13E-02 3.05E-02 1.02E+00 1.57E-02 6.04E-02 1.07E+00 4.46E-02 8.86E-02 1.22E+00 1.49E-01G010 2.03E-02 1.02E+00 1.31E-02 4.41E-02 1.03E+00 1.72E-02 9.27E-02 1.07E+00 4.57E-02 1.44E-01 1.23E+00 1.50E-01G020 3.16E-02 1.03E+00 1.44E-02 7.05E-02 1.03E+00 1.82E-02 1.54E-01 1.07E+00 4.62E-02 2.47E-01 1.23E+00 1.50E-01G030 4.09E-02 1.03E+00 1.50E-02 9.22E-02 1.03E+00 1.86E-02 2.04E-01 1.08E+00 4.65E-02 3.33E-01 1.23E+00 1.50E-01G040 5.05E-02 1.03E+00 1.54E-02 1.15E-01 1.04E+00 1.89E-02 2.57E-01 1.08E+00 4.67E-02 4.24E-01 1.24E+00 1.51 E-01G050 5.88E-02 1.03E+00 1.57E-02 1.34E-01 1.04E+00 1.91 E-02 3.03E-01 1.08E+00 4.68E-02 5.03E-01 1.24E+00 1.51 E-01G075 8.04E-02 1.03E+00 1.61E-02 1.85E-01 1.04E+00 1.95E-02 4.24E-01 1.08E+00 4.70E-02 7.10E-01 1.24E+00 1.51E-01G100 1.O0E-01 1.03E+00 1.64E-02 2.33E-01 1.04E+00 1.97E-02 5.35E-01 1.08E+00 4.72E-02 9.02E-01 1.24E+00 1.51E-01G125 1.21E-01 1.03E+00 1.66E-02 2.82E-01 1.04E+00 1.99E-02 6.51E-01 1.08E+00 4.73E-02 1.10E+00 1.24E+00 1.51E-01G150 1.41 E-01 1.03E+00 1.67E-02 3.30E-01 1.04E+00 2.OOE-02 7.65E-01 1.08E+00 4.74E-02 1.30E+00 1.24E+00 1.52E-01Frequency

.10,Hz25 Hz100 HZ2Motion Input PSA lInput PSA Median L Input PSANae ~Median Log-SD Mein Log-SD Median Log-SDName [g] I .[g] .. [g]G001 2.22E-02 1.52E+00 2.12E-01 1.32E-02 1.32E+00 1.11E-01 1.05E-02 1.26E+00 1.06E-01G005 1.14E-01 1.57E+00 2.23E-01 1.01E-01 1.40E+00 1.78E-01 5.13E-02 1.42E+00 1.11E-01G010 2.01E-01 1.58E+00 2.24E-01 2.08E-01 1.39E+00 1.89E-01 1.01E-01 1.43E+00 1.04E-01G020 3.60E-01 1.58E+00 2.25E-01 4.08E-01 1.39E+00 1.94E-01 2.03E-01 1.43E+00 1.02E-01G030 4.96E-01 1.58E+00 2.25E-01 5.84E-01 1.39E+00 1.96E-01 2.97E-01 1.42E+00 1.01E-01G040 6.40E-01 1.59E+00 2.25E-01 7.73E-01 1.39E+00 1.98E-01 4.02E-01 1.42E+00 1.01E-01G050 7.65E-01 1.59E+00 2.26E-01 9.39E-01 1.39E+00 1.99E-01 4.95E-01 1.42E+00 1.01E-01G075 1.09E+00 1.59E+00 2.26E-01 1.38E+00 1.39E+00 2.OOE-01 7.47E-01 1.41 E+00 1.02E-01G100 1.40E+00 1.59E+00 2.26E-01 1.79E+00 1.39E+00 2.01E-01 9.87E-01 1.41E+00 1.03E-01G125 1.72E+00 1.59E+00 2.27E-01 2.22E+00 1.39E+00 2.01E-01 1.24E+00 1.41 E+00 1.04E-01G150 2.03E+00 1.59E+00 2.27E-01 2.65E+00 1.39E+00 2.02E-01 1.49E+00 1.41E+00 1.04E-01A-22 North Anna Power Station Units 1 and 2Seismic Hazard and Screening ReportAppendix ATable A-2b: Computed median and logarithmic standard deviation of the site amplification at frequencies of 0.5, 1.0, 2.5, 5.0,10, 25, and 100 Hz for the double-corner seismoloaical model.Frequericy 0.5Hz 1.0 Hz 2.5 Hz 5.0 Hz* .',,Input*

M da ,j : Input ':.

InputMotion Name. IPSA [g] M: PSA [g] Median Log-SD put Median iLogSD put Median Log-SD_____________

,PAg LS g PSA [g] _____ PSA [g] ____G001 2.26E-03 1.01E+00 9.67E-03 6.72E-03 1.02E+00 1.50E-02 2.OOE-02 1.06E+00 4.62E-02 2.74E-02 1.21 E+00 1.50E-01G005 4.56E-03 1.02E+00 1.47E-02 1.53E-02 1.03E+00 1.90E-02 5.64E-02 1.08E+00 4.96E-02 9.82E-02 1.23E+00 1.54E-01G010 6.16E-03 1.03E+00 1.63E-02 2.15E-02 1.04E+00 2.01E-02 8.45E-02 1.08E+00 5.01E-02 1.57E-01 1.24E+00 1.54E-01G020 9.OOE-03 1.03E+00 1.70E-02 3.22E-02 1.04E+00 2.09E-02 1.32E-01 1.08E+00 5.03E-02 2.56E-01 1.24E+00 1.54E-01G030 1.17E-02 1.03E+00 1.70E-02 4.22E-02 1.04E+00 2.12E-02 1.76E-01 1.09E+00 5.05E-02 3.47E-01 1.25E+00 1.54E-01G040 1.42E-02 1.04E+00 1.70E-02 5.17E-02 1.04E+00 2.15E-02 2.18E-01 1.09E+00 5.05E-02 4.35E-01 1.25E+00 1.54E-01G050 1.64E-02 1.04E+00 1.69E-02 6.03E-02 1.04E+00 2.16E-02 2.56E-01 1.09E+00 5.06E-02 5.14E-01 1.25E+00 1.54E-01G075 2.20E-02 1.04E+00 1.68E-02 8.15E-02 1.04E+00 2.19E-02 3.50E-01 1.09E+00 5.07E-02 7.12E-01 1.25E+00 1.54E-01G100 2.74E-02 1.04E+00 1.67E-02 1.02E-01 1.04E+00 2.20E-02 4.41E-01 1.09E+00 5.08E-02 9.04E-01 1.25E+00 1.54E-01G125 3.26E-02 1.04E+00 1.67E-02 1.22E-01 1.05E+00 2.22E-02 5.29E-01 1.09E+00 5.08E-02 1.09E+00 1.25E+00 1.54E-01G150 3.81E-02 1.04E+00 1.68E-02 1.42E-01 1.05E+00 2.23E-02 6.21E-01 1.09E+00 5.09E-02 1.28E+00 1.25E+00 1.55E-01Frequency 10 Hz25 Hz100 HzMotion Name Input Median Input Median Log-SD, Input Meia t Log-SDMotionName

_ PSA [g] :Log-D PSA [g] " PSA [g]G001 2.54E-02 1.55E+00 2.19E-01 1.35E-02 1.37E+00 1.21E-01 1.07E-02 1.32E+00 1.29E-01G005 1.28E-01 1.58E+00 2.26E-01 1.04E-01 1.41 E+00 1.74E-01 5.24E-02 1.45E+00 1.22E-01G010 2.26E-01 1.59E+00 2.27E-01 2.21E-01 1.41E+00 1.88E-01 1.03E-01 1.46E+00 1.13E-01G020 3.89E-01 1.59E+00 2.27E-01 4.27E-01 1.40E+00 1.94E-01 2.02E-01 1.46E+00 1.07E-01G030 5.40E-01 1.60E+00 2.28E-01 6.22E-01 1.40E+00 1.97E-01 3.OOE-01 1.45E+00 1.05E-01G040 6.87E-01 1.60E+00 2.28E-01 8.15E-01 1.40E+00 1.98E-01 4.02E-01 1.44E+00 1.04E-01G050 8.20E-01 1.60E+00 2.28E-01 9.92E-01 1.40E+00 1.99E-01 4.97E-01 1.44E+00 1.04E-01G075 1.15E+00 1.60E+00 2.28E-01 1.44E+00 1.40E+00 2.01E-01 7.46E-01 1.43E+00 1.04E-01G100 1.48E+00 1.60E+00 2.29E-01 1.88E+00 1.40E+00 2.02E-01 9.95E-01 1.43E+00 1.05E-01G125 1.79E+00 1.60E+00 2.29E-01 2.31E+00 1.40E+00 2.03E-01 1.24E+00 1.42E+00 1.05E-01G150 2.12E+00 1.60E+00 2.29E-01 2.77E+00 1.40E+00 2.03E-01 1.50E+00 1.42E+00 1.06E-01A-23