Text

Annual Radiological Environmental Operating Report
	ML21116A156
Person / Time
Site:	Susquehanna
Issue date:	04/26/2021
From:	Cimorelli K; Susquehanna
To:	; Document Control Desk, Office of Nuclear Reactor Regulation
References
	PLA-7928
	Download: ML21116A156 (105)
	v • d • e

April 26, 2021 Kevin Cimorelli Site Vice President Susquehanna Nuclear, LLC 769 Salem Boulevard Berwick, PA 18603 Tel. 570.542.3795 Fax 570.542.1504 Kevin.Cimorelli@TalenEnergy.com TALEN~

ENERGY U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555-0001 10 CFR 50.4 SUSQUEHANNA STEAM ELECTRIC STATION ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT PLA-7928 Docket No. 50-387 50-388 In accordance with the Susquehanna Steam Electric Station (SSES) Units 1 and 2 Technical Specification 5.6.2, the SSES Annual Radiological Environmental Operating Report is hereby submitted for the 2020 calendar year.

There are no new or revised regulatory commitments contained in this submittal.

If you have any questions regarding this report, please contact Ms. Melisa Krick, Manager-Nuclear Regulatory Affairs, at (570) 542-1818.

Attachment:

2020 Annual Radiological Environmental Operating Report Copy:

NRC Region I Ms. S. Goetz, NRC Project Manager Mr. C. Highley, NRC Senior Resident Inspector Mr. M. Shields, PA DEP/BRP Mr. H. Anagnostopoulos, NRC Region 1

Attachment to PLA-7928 2020 Annual Radiological Environmental Operating Report

SUSQUEHANNA STEAM ELECTRIC STATION UNITS 1 and 2 Annual Radiological Environmental Operating Report 2020 Prepared by:

F. J. Hickey, sVi--iea1tPhysicist Reviewed by:

I(.M. Ervin, Sr. Environmental Scientist Approved by:

1. ~

isewood, Manager - Plant Chemistry / Environmental Susquehanna Nuclear, LLC 769 Salem Boulevard Berwick, Pennsylvania 18603

SUSQUEHANNA STEAM ELECTRIC STATION Units 1 & 2 2020 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT JANUARY 1 TO DECEMBER 31, 2020 Susquehanna Nuclear, LLC Berwick, PA April, 2021

TABLE OF CONTENTS I. Summary.......................................................................................................................... 1 II. The Radiological Environmental Monitoring Program.............................................. 5 A. Objectives of the Operational REMP................................................................... 6 B. Implementation of the Objectives........................................................................ 6 III. Program Description...................................................................................................... 8 A. Data Interpretation............................................................................................... 8 B. Program Exceptions.......................................................................................... 10 C. Program Changes............................................................................................. 10 D. Quality Assurance Program.............................................................................. 19 E. Summary of Results - Inter-Laboratory Comparison Program......................... 19 IV. Results and Discussion............................................................................................... 22 A. Atmospheric....................................................................................................... 23

1. Air Particulates........................................................................................ 23

2. Air Iodine............................................................................................... 24 B. Direct Radiation................................................................................................. 25 C. Terrestrial.......................................................................................................... 25

1. Milk......................................................................................................... 25

2. Groundwater........................................................................................... 26

3. Drinking Water........................................................................................ 28

4. Food Products......................................................................................... 29 D. Aquatic.............................................................................................................. 30

1. Surface Water......................................................................................... 30

2. Fish......................................................................................................... 32

3. Shoreline Sediment................................................................................. 32 E. Land Use Census.............................................................................................. 34 V. Annotations to Previous AREOR.................................................................................. 35 VI. Conclusions................................................................................................................. 35 VII. References................................................................................................................. 36

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TABLE OF CONTENTS (contd)

Appendix A - Program Summary.................................................................................... A-1 Appendix B - Sample Designation and Locations............................................................ B-1 Appendix C - Data Tables............................................................................................... C-1 Appendix D - Summary of Results from Analytics, Environmental Resource Associates (ERA) and Department of Energy (DOE) - Mixed Analyte Performance Evaluation Program (MAPEP)................................. D-1 Appendix E - REMP Sample Equipment Operability Trending................................. E-1

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LIST OF TABLES Exceptions Table................................................................................................................ 11 Appendix A Tables Table A Summary of Data for SSES........................................................................ A-2 Appendix B Tables Table B-1 Sampling Locations.................................................................................... B-3 Table B-2 Susquehanna Steam Electric Station Radiological Environmental Monitoring Program.................................................................................... B-8 Appendix C Tables Table C-1 Gross Beta Analyses of Air Particulate Filters Susquehanna Steam Electric Station......................................................................................... C-2 Table C-2 Gamma Spectroscopic Analyses of Composited Air Particulate Filters Susquehanna Steam Electric Station....................................................... C-4 Table C-3 Iodine-131 Analyses of Air Iodine Samples Susquehanna Steam Electric Station......................................................................................... C-5 Table C-4 Environmental Optically Stimulated Luminescence Dosimetry Results Susquehanna Steam Electric Station....................................................... C-7 Table C-5 Iodine-131 and Gamma Spectroscopic Analyses of Milk Susquehanna Steam Electric Station.............................................................................. C-10 Table C-6 Tritium and Gamma Spectroscopic Analyses of Groundwater Susquehanna Steam Electric Station....................................................... C-12

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LIST OF TABLES (contd)

Table C-7 Annual Average Tritium Concentration in Precipitation, Monitoring Wells and Lake Took-a-While (LTAW) Surface Water Data Susquehanna Steam Electric Station....................................................... C-14 Table C-8 Gross Beta, Tritium and Gamma Spectroscopic Analyses of Drinking Water Susquehanna Steam Electric Station............................................ C-15 Table C-9 Gamma Spectroscopic Analyses of Food Products (Fruits, Vegetables, and Broadleaf) Susquehanna Steam Electric Station.......... C-16 Table C-10 Tritium and Gamma Spectroscopic Analyses of Surface Water Susquehanna Steam Electric Station....................................................... C-17 Table C-11 Gamma Spectroscopic Analyses of Fish Susquehanna Steam Electric Station...................................................................................................... C-19 Table C-12 Gamma Spectroscopic Analyses of Shoreline Sediment Susquehanna Steam Electric Station.............................................................................. C-20 Appendix D Tables Table D-1 Analytics Environmental Radioactivity Cross Check Program Teledyne Brown Engineering Environmental Services............................................ D-2 Table D-2 DOEs Mixed Analyte Performance Evaluation Program (MAPEP)

Teledyne Brown Engineering Environmental Services............................. D-4 Table D-3 ERA Environmental Radioactivity Cross Check Program Teledyne Brown Engineering Environmental Services............................................ D-5

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LIST OF TABLES (contd)

Appendix E Table Table E-1 REMP Sample Equipment Operability Trending Susquehanna Steam Electric Station......................................................................................... E-2 LIST OF MAPS Map B-1 Direct Radiation Monitoring Locations Within One Mile.............................. B-10 Map B-2 Direct Radiation Monitoring Locations From One to Five Miles.................. B-11 Map B-3 Direct Radiation Monitoring Locations Greater than Five Miles.................. B-12 Map B-4 Environmental Sampling Locations Within One Mile.................................. B-13 Map B-5 Environmental Sampling Locations From One to Five Miles...................... B-14 Map B-6 Environmental Sampling Locations Greater than Five Miles...................... B-15 LIST OF FIGURES Figure C-1 Gross Beta Activity in Air Particulates......................................................... C-21 Figure C-2 Ambient Radiation Levels Based on Environmental Dosimetry Data............................................................................................................ C-22 Figure C-3 Iodine-131 Activity in Milk........................................................................... C-23 Figure C-4 Annual Average Tritium Activity in Precipitation and Surface Water Versus Ground Water...................................................................... C-24

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LIST OF FIGURES (contd)

Figure C-5 Gross Beta Activity in Drinking Water......................................................... C-25 Figure C-6 Tritium Activity in Surface Water................................................................. C-26

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I.

Summary During normal operations of a nuclear power generating station there are permitted releases of small amounts of radioactive material to the environment. To monitor and determine the effects of these releases a Radiological Environmental Monitoring Program (REMP) has been established around the Susquehanna Steam Electric Station (SSES). The results of the REMP are published annually, providing a summary and interpretation of the data collected.

Applied Ecoscience, Inc. was responsible for the collection of environmental samples during 2020. Teledyne Brown Engineering (TBE) was responsible for the analysis of environmental samples during 2020. The results are discussed in this report. Landauer provided the dosimetry services for SSES during 2020.

This Annual Radiological Environmental Operating Report (AREOR) conducted for SSES covers the period January 1, 2020 through December 31, 2020. During that time period, 1332 analyses were performed on 1141 samples.

Tritium (H-3) is the only man-made radionuclide detected in the environment by the Susquehanna Steam Electric Station (SSES) Radiological Environmental Monitoring Program (REMP) that is attributable to station operations. The whole body and organ dose to members of the public attributable to tritium identified in REMP cooling tower blowdown samples was 5.56E-04 mRem. Tritium was included in the dose calculation because it was identified in the REMP samples of permitted water being discharged to the Susquehanna River. The 2020 average concentration of tritium in the cooling tower blowdown water and the 2020 average cooling tower blowdown flow were used to determine the amount of tritium released. The presumed exposure pathways to the public from this radionuclide were drinking water taken from the Susquehanna River at Danville, PA and eating fish caught near the SSES discharge to the river. Dose from ground plane deposition (shoreline exposure) is not applicable because tritium does not emit gamma radiation and the beta radiation emitted by tritium is not sufficiently penetrating to reach an individual on the shore.

Based on the above outlined methodology, the total tritium activity released from the SSES to the Susquehanna River in 2020 was 31.0 curies.

The 2020 average dilution factor for the Susquehanna River was 666, based on the annual average river flow of 6.58E+06 gpm and the annual average cooling tower blowdown flow of 9.874E+03 gpm.

The REMP Sample Equipment Operability and year-to-year trend comparison is located in Appendix E, Table E-1.

The REMP was conducted in accordance with the SSES Technical Requirements Manual (TRM) and the respective station Offsite Dose Calculation Manual (ODCM) which are based on the design objectives in 10CFR Part 50, Appendix I, Sections IV.B.2, IV.B.3 and IV.C. The Lower Limit of Detection (LLD) values required by the TRM and SSES ODCM were achieved for the 2020 reporting period. The REMP objectives were also met during this period. The concentration of radioactive material in the environment that could be attributable to SSES operations was only a small fraction of the concentration of naturally occurring and man-made radioactivity. Since these results were comparable to the results obtained during the preoperational phase of the program and combined with historical results collected since commercial operation, it can be concluded that the levels and fluctuations were as expected and that the operation of the SSES had no significant radiological impact on the environment. Additionally, the REMP sample results for 2020 verify the adequacy of the SSES radioactive effluent control systems.

Samples of air particulates, air iodine, milk, groundwater, drinking water, vegetation, surface water, fish and sediment were collected and analyzed.

External radiation dose measurements were also made in the vicinity of SSES using passive dosimeters.

Air particulate samples were analyzed for concentrations of gross beta weekly and gamma emitting nuclides quarterly. Gross beta and cosmogenically produced beryllium-7 (Be-7) were detected at levels consistent with those detected in previous years. No fission or activation products were detected.

High sensitivity iodine-131 (I-131) analyses were performed on weekly air samples. All results were less than the minimum detectable concentration.

Environmental gamma radiation measurements were performed quarterly using optically stimulated luminescent dosimeters (OSLD). The levels of radiation detected were consistent with those observed in previous years.

Cow milk samples were analyzed for concentrations of I-131 and gamma emitting nuclides. All I-131 results were below the minimum detectable concentration. Naturally occurring potassium-40 (K-40) was detected at levels consistent with those detected in previous years. No fission or activation products were detected.

Groundwater samples were analyzed for concentrations of tritium and gamma emitting nuclides. Tritium activities were detected at levels consistent with those detected in previous years. No fission or activation products were detected.

Drinking water samples were analyzed for concentrations of tritium, gross beta and gamma emitting nuclides. Gross beta activities detected were consistent with those detected in previous years. No fission or activation products were detected.

Food product (fruits, vegetables and broadleaf vegetation) samples were analyzed for concentrations of gamma emitting nuclides. Naturally occurring Be-7 and K-40 were detected at levels consistent with those detected in previous years. No fission or activation products were detected.

Surface water samples were analyzed for concentrations of tritium and gamma emitting nuclides. Tritium activities detected were consistent with those detected in previous years. No fission or activation products were detected.

Fish and shoreline sediment samples were analyzed for concentrations of gamma emitting nuclides. Naturally occurring K-40 was detected at levels consistent with those detected in previous years. Naturally occurring actinium-228 (Ac-228) and thorium-228 (Th-228) were detected in shoreline sediment at levels consistent with results in previous years. No fission or activation products were detected in fish or sediment samples.

II.

The Radiological Environmental Monitoring Program The Susquehanna Steam Electric Station (SSES) is a nuclear electrical generating facility with two boiling-water reactors and generators located just west of the Susquehanna River, approximately 5 miles northeast of Berwick, in Luzerne County, Pennsylvania. The station was constructed in the 1970s, with Unit 1 beginning commercial operation on June 8, 1983, and Unit 2 beginning commercial operation on February 12, 1985. Units 1 and 2 each generate a net 1,350 megawatts (MWe), for a total station output of 2,700 MWe.

In total Susquehanna Nuclear, LLC presently owns 2,347 acres of land on both sides of the Susquehanna River. Generally, this land is characterized by open deciduous woodlands interspersed with grasslands.

On the west side of the river, 1,605 (1,670 minus 65 acre Gould Island) acres of land is jointly owned between Susquehanna Nuclear, LLC (90%) and Allegheny Electric Cooperative (10%). The land use on the west side of the river includes generation and associated maintenance facilities, laydown areas, parking lots, roads, a nature preserve (the Susquehanna Riverlands),

and agricultural leases to local farmers.

To the north of the station along the river, Susquehanna Nuclear, LLC owns 100% of the 65-acre Gould Island. On the east side of the river, and across the river from the station, Susquehanna Nuclear, LLC is the 100% owner of 677 acres that are maintained as undeveloped land, natural recreational areas, wildlife areas, and leases to local farmers.

More specific information on the demography, hydrology, meteorology, and land use characteristics of the area in the vicinity of the SSES can be found in the Environmental Report [Reference 1], the Final Safety Analysis Report

[Reference 2] and the Final Environmental Statement [Reference 3] for the SSES.

Radioanalytical data from samples collected under the REMP were compared with results from the preoperational phase and historical results during operations. Differences between these periods were examined statistically to determine the effects of station operations. This report presents the results from January 1 through December 31, 2020, for the SSES Radiological Environmental Monitoring Program (REMP).

A.

Objectives of the Operational REMP The objectives of the Operational REMP are to:

1.

Document compliance with SSES REMP Technical Requirements and radiological environmental surveillances.

2.

Verify proper implementation of SSES radiological effluent controls.

3.

Identify, measure and evaluate trends of radionuclide concentrations in environmental pathways near SSES.

4.

Assess impact of SSES Effluents on the Environment and the public.

5.

Verify that SSES operations have no detrimental effects on the health and safety of the public or on the environment.

B.

Implementation of the Objectives

1.

In order to meet the objectives, an operational REMP was developed. Samples of various media were selected for monitoring due to the radiological dose impact to humans and other organisms. The selection of samples was based on:

(a)

Established critical pathways for the transfer of radionuclides through the environment to man, and (b)

Experience gained during the preoperational phase.

Sampling locations were determined based on site meteorology, Susquehanna River hydrology, local demography, and land uses.

2.

Sampling locations were divided into two classes, indicator and control. Indicator locations were sited where it is expected that radiation and radioactive material that might originate from the station would be detectable. Control locations were selected in areas where they would be unaffected by station operations (i.e. Susquehanna River upstream from the station, >10 miles from the station in least prevalent wind directions). Fluctuations in the levels of radionuclides and direct radiation at indicator locations were evaluated with respect to analogous fluctuations at control locations. Indicator and control location data were also evaluated relative to preoperational data.

3.

Appendix A, Program Summary, describes and summarizes the analytical results in accordance with the SSES Technical Specifications.

4.

Appendix B, Sample Designation and Locations, describes the coding system which identifies sample type and location. Table B-1 lists the location codes, locations, latitude, longitude, and the types of samples collected at each location. Table B-2 contains sample medium, analysis and sampling details.

5.

The sampling locations are indicated on the following maps:

Map B-1, Direct Radiation Monitoring Locations Within One Mile Map B-2, Direct Radiation Monitoring Locations From One to Five Miles Map B-3, Direct Radiation Monitoring Locations Greater Than Five Miles Map B-4, Environmental Sampling Locations Within One Mile Map B-5, Environmental Sampling Locations From One to Five Miles Map B-6, Environmental Sampling Locations Greater Than Five Miles III.

Program Description A.

Data Interpretation Results of analyses are grouped according to sample type and presented in Appendix C, Data Tables. All results above the Lower Limit of Detection (LLD) are at a confidence level of +/- 2 sigma. This represents the range of values into which 95% of repeated analyses of the same sample should fall. As defined in U.S. Nuclear Regulatory Commission Regulatory Guide 4.8, LLD is the smallest concentration of radioactive material in a sample that will yield a net count (above system background) that will be detected with 95% probability, with only 5% probability of falsely concluding that a blank observation represents a "real signal." LLD is normally calculated as 4.66 times the standard deviation of the background counting rate, or of the blank sample count, as appropriate, divided by counting efficiency, sample size, 2.22 (dpm per picocurie), the radiochemical yield when applicable, the radioactive decay constant and the elapsed time between sample collection and time of counting. LLD represents the capability of the measurement system.

The Minimum Detectable Concentration (MDC) is defined as the smallest concentration of radioactive material that can be detected at a given confidence level. The MDC differs from the LLD in that the MDC takes into consideration the interference caused by the presence of other nuclides while the LLD does not. MDC is an indicator of the performance of the measurement system. The MDC is set to be below the LLD.

Summaries of the radionuclide average picocurie activities and ranges are included in Table A. If a radionuclide was not detected, zero was used for that isotope in dose calculations and the activity is listed as

<MDC (less than the minimum detectable concentration) in Table A.

<MDC indicates that no activity was positively detected in any sample when samples were analyzed with techniques which achieved the required Lower Limits of Detection (LLD). The following are typical measurement laboratory MDCs for airborne and waterborne REMP samples.

Airborne REMP Typical MDCs Radionuclide MDC (pCi/cu.m.)

Mn-54 1.2 E-03 Fe-59 6.9 E-03 Co-58 1.8 E-03 Co-60 1.2 E-03 Zn-65 2.9 E-03 Cs-134 1.2 E-03 Cs-137 1.0 E-03 I-131 2.0 E-01 Waterborne REMP Typical MDCs Radionuclide MDC (pCi/L.)

H-3 (DIST) 1.6 E+02 Mn-54 3.4 E+00 Fe-59 1.0 E+01 Co-58 3.7 E+00 Co-60 3.9 E+00 Zn-65 7.4 E+00 Cs-134 3.4 E+00 Cs-137 3.7 E+00 I-131 1.1 E+01 H-3 1.6 E+02 Gross Beta 1.9 E+00 The grouped data were averaged and standard deviations calculated.

Thus, the +/- 2 sigma of the averaged data represent sample and not analytical variability. For reporting and calculation of averages, any result occurring at or below the LLD is considered to be at the LLD level.

B.

Program Exceptions See Exceptions Table 2020 REMP Atypical Sampling Occurrences C.

Program Changes Location 1S4 was added as a groundwater sampling station in 2020.

2020 REMP Atypical Sampling Occurrences Date Sample Type Location Code(s)

Sample Period Reason for Occurrence(s)

Corrective Action MAR Air 13S6 02/26/20 to 03/04/20 (loss of 0.6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months )

Air monitor was not operational upon arrival or departure on 03/04/20 due to local power outage.

Power outage began on 03/04/20 @ 0857 hours0.00992 days 0.238 hours 0.00142 weeks 3.260885e-4 months , as determined by timer box.

Non-continuous sampler operation.

CA #20-02 CR 2020-03312 03/04/20: Air monitor resumed normal operation when power was restored @ 0934 hours0.0108 days 0.259 hours 0.00154 weeks 3.55387e-4 months .

03/04/20: Operability verified @ 1152 hours0.0133 days 0.32 hours 0.0019 weeks 4.38336e-4 months .

Ideal sample collected for sample period:

22,500 cf.

Air 8G1 03/18/20 to 03/25/20 Pump providing inadequate flow rate upon arrival

(<2.0 cfm), below the procedural range of 2.0-2.4 cfm. Fan blades were discovered to have broken off the pump.

Continuous sampling during sample period.

CA #20-03 CR 2020-04198 03/25/20: Pump was replaced, and air flow restored to 2.2 cfm.

03/25/20: Operability verified @ 1301 hours0.0151 days 0.361 hours 0.00215 weeks 4.950305e-4 months .

Less than ideal sample collected for sample period:

5,000 cf (03/18/20 to 03/25/20).

Volume adequate to support required analysis.

APR Air 12S1 04/15/20 to 04/22/20 (momentary loss of 12kV power)

Momentary loss of power on 04/16/20.

No loss of sampling time as determined by timer box.

Non-continuous sampler operation.

CA #20-04 CR 2020-05908 04/16/20: No action required. Air monitor resumed normal operation when power was restored.

04/20/20: Operability verified @ 0911 hours0.0105 days 0.253 hours 0.00151 weeks 3.466355e-4 months .

Ideal sample collected for sample period:

22,500 cf.

1 2020 REMP Atypical Sampling Occurrences (continued)

Date Sample Type Location Code(s)

Sample Period Reason for Occurrence(s)

Corrective Action APR (cont.)

Air 3S2 04/15/20 to 04/22/20 (loss of 54.3 hours3.472222e-5 days 8.333333e-4 hours 4.960317e-6 weeks 1.1415e-6 months )

Air monitor was found to be non-operational on 04/21/20 due to a tripped surge protector.

Power outage began on 04/16/20, as determined by timer box.

Non-continuous sampler operation.

CA #20-05 CR 2020-06304 04/21/20: Surge protector reset @ 1042 hours0.0121 days 0.289 hours 0.00172 weeks 3.96481e-4 months and air monitor resumed normal operation.

04/21/20: Operability verified @ 1042 hours0.0121 days 0.289 hours 0.00172 weeks 3.96481e-4 months .

04/22/20: Operability and volume verified @

0847 hours0.0098 days 0.235 hours 0.0014 weeks 3.222835e-4 months .

Less than ideal sample collected for sample period:

7,000 cf (04/15/20 to 04/22/20).

Volume adequate to support required analysis.

JUN Air 12S1 06/03/20 to 06/10/20 (momentary losses of 12kV power)

Momentary losses of power on 06/05/20 &

06/06/20 for scheduled maintenance.

No loss of sampling time as determined by timer box.

CA #20-06 06/05/20 & 06/06/20: No action required. Air monitor resumed normal operation when power was restored.

06/05/20: Operability verified @ 1442 hours0.0167 days 0.401 hours 0.00238 weeks 5.48681e-4 months .

06/06/20: Operability verified @ 1707 hours0.0198 days 0.474 hours 0.00282 weeks 6.495135e-4 months .

Ideal sample collected for sample period:

21,400 cf.

Air 12S1 06/03/20 to 06/10/20 (momentary loss of 12kV power)

Momentary loss of power on 06/08/20.

No loss of sampling time as determined by timer box.

Non-continuous sampler operation.

CA #20-07 CR 2020-08340 06/08/20: No action required. Air monitor resumed normal operation when power was restored.

06/08/20: Operability verified @ 0834 hours0.00965 days 0.232 hours 0.00138 weeks 3.17337e-4 months .

Ideal sample collected for sample period:

21,400 cf.

2 2020 REMP Atypical Sampling Occurrences (continued)

Date Sample Type Location Code(s)

Sample Period Reason for Occurrence(s)

Corrective Action JUN (cont.)

Air 12S1 06/10/20 to 06/17/20 (loss of 2.5 hours5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months ) 12kV power outage occurred on 06/11/20 due to grid disturbance from thunderstorm.

Loss of 2.5 hours5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months , as determined by timer box.

Non-continuous sampler operation.

CA #20-08 CR 2020-08533 06/11/20: No action required. Air monitor resumed normal operation when power was restored.

06/11/20: Operability verified @ 0857 hours0.00992 days 0.238 hours 0.00142 weeks 3.260885e-4 months .

Ideal sample collected for sample period:

21,300 cf.

Surface Water 6S6 06/09/20 to 06/16/20 (week 3 June composite)

No sample flow to ACS as discovered during weekly collection, possibly due to a blocked sample line. Approximately 0.5 gallons of water remained in line upon arrival. Unable to obtain flow rate.

CA #20-09 CR 2020-08721 06/16/20: Adequate sample volume collected during sample period. Composite sample for week 3 June to be used in monthly composite.

Requested I&C perform maintenance ASAP.

06/23/20: Sample flow appeared to restore itself (as observed during weekly collection-week 4 June). Operability verified @ 1050 hours0.0122 days 0.292 hours 0.00174 weeks 3.99525e-4 months .

06/24/20: I&C performed maintenance.

Ideal sample collected for sample period.

Air 12S1 06/10/20 to 06/17/20 Timer box malfunction due to electrical storm on 06/11/20. Timer box did not advance past 21.0 hours0 days 0 hours 0 weeks 0 months for the sampling period, and would not reset.

CA #20-10 06/17/20: Timer box #3 replaced with timer box

8. Surge protector also replaced.

06/17/20: Operability verified @ 1039 hours0.012 days 0.289 hours 0.00172 weeks 3.953395e-4 months .

Ideal sample collected for sample period:

21,300 cf.

3 2020 REMP Atypical Sampling Occurrences (continued)

Date Sample Type Location Code(s)

Sample Period Reason for Occurrence(s)

Corrective Action JUN (cont.)

Air 8G1 06/10/20 to 06/17/20 (loss of 0.2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months )

Power outage-date and time unknown.

Loss of 0.2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months , as determined by timer box during weekly collection.

Non-continuous sampler operation.

CA #20-11 CR 2020-08787 06/17/20: No action required. Air monitor resumed normal operation when power was restored.

06/17/20: Operability verified @ 1244 hours0.0144 days 0.346 hours 0.00206 weeks 4.73342e-4 months .

Ideal sample collected for sample period:

21,400 cf.

Air 12S1 06/17/20 to 06/24/20 (momentary loss of 12kV power)

Momentary loss of power on 06/20/20.

No loss of sampling time as determined by timer box.

Non-continuous sampler operation.

CA #20-12 CR 2020-08932 06/20/20: No action required. Air monitor resumed normal operation when power was restored.

06/22/20: Operability verified @ 0908 hours0.0105 days 0.252 hours 0.0015 weeks 3.45494e-4 months .

Ideal sample collected for sample period:

20,600 cf.

JUL Air 12S1 07/08/20 to 07/15/20 (momentary loss of 12kV power)

Momentary loss of power on 07/08/20.

No loss of sampling time as determined by timer box.

Non-continuous sampler operation.

CA #20-13 CR 2020-09709 07/08/20: No action required. Air monitor resumed normal operation when power was restored.

07/08/20: Operability verified @ 1316 hours0.0152 days 0.366 hours 0.00218 weeks 5.00738e-4 months .

Ideal sample collected for sample period:

20,800 cf.

4 2020 REMP Atypical Sampling Occurrences (continued)

Date Sample Type Location Code(s)

Sample Period Reason for Occurrence(s)

Corrective Action JUL (cont.)

Air 12S1 07/15/20 to 07/22/20 (momentary loss of 12kV power)

Momentary loss of power on 07/19/20.

No loss of sampling time as determined by timer box.

Non-continuous sampler operation.

CA #20-14 CR 2020-10192 07/19/20: No action required. Air monitor resumed normal operation when power was restored.

07/20/20: Operability verified @ 0902 hours0.0104 days 0.251 hours 0.00149 weeks 3.43211e-4 months .

Ideal sample collected for sample period:

20,800 cf.

Air 10S3 07/22/20 to 07/29/20 (loss of 93.7 hours8.101852e-5 days 0.00194 hours 1.157407e-5 weeks 2.6635e-6 months )

Air monitor was not operational upon arrival or departure on 07/29/20 due to local power outage.

Power outage began on 07/25/20 @ 1136 hours0.0131 days 0.316 hours 0.00188 weeks 4.32248e-4 months , as determined by timer box.

Non-continuous sampler operation.

CA #20-15 CR 2020-10660 07/29/20: Outage reported to PPL outage center. Timer box reset to record delayed start time. Air monitor resumed normal operation when power was restored @ 1226 hours0.0142 days 0.341 hours 0.00203 weeks 4.66493e-4 months .

07/30/20: Operability verified @ 0950 hours0.011 days 0.264 hours 0.00157 weeks 3.61475e-4 months .

Less than ideal sample collected for sample period:

9,100 cf (07/22/20 to 07/29/20).

Volume adequate to support required analysis.

AUG Air 12S1 08/26/20 to 09/02/20 (loss of 5.4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months ) 12kV power outage occurred on 08/29/20.

Loss of 5.4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months as determined by timer box.

Non-continuous sampler operation.

CA #20-16 CR 2020-12081 08/29/20: No action required. Air monitor resumed normal operation when power was restored.

08/30/20: Operability verified @ 1810 hours0.0209 days 0.503 hours 0.00299 weeks 6.88705e-4 months .

Ideal sample collected for sample period:

21,700 cf.

5 2020 REMP Atypical Sampling Occurrences (continued)

Date Sample Type Location Code(s)

Sample Period Reason for Occurrence(s)

Corrective Action AUG (cont.)

Surface Water 6S6 08/30/20 to 10/13/20 (week 2 September composite through week 2 October composite)

ACS removed from service for planned maintenance to install new sampler per EC 1726215.

CA #20-17 CR 2020-12106 08/30/20: Week 1 September sample collected early and sampler taken out of service @ 1840 hours0.0213 days 0.511 hours 0.00304 weeks 7.0012e-4 months .

10/13/20: New sampler brought to service and operability verified @ 1130 hours0.0131 days 0.314 hours 0.00187 weeks 4.29965e-4 months .

Grab samples collected for sample periods @

location 5S9.

SEP Air 12S1 09/02/20 to 09/09/20 (momentary loss of 12kV power)

Momentary loss of power on 09/05/20 during planned maintenance evolution.

No loss of sampling time as determined by timer box.

Non-continuous sampler operation.

CA #20-18 CR 2020-12406 09/05/20: No action required. Air monitor resumed normal operation when power was restored.

09/07/20: Operability verified @ 1152 hours0.0133 days 0.32 hours 0.0019 weeks 4.38336e-4 months .

Ideal sample collected for sample period:

21,500 cf.

OCT Surface Water 2S7 10/15/20 (week 3 October composite)

Supply line blockage at ACS as indicated by sampler operation (increased air bubbles in supply line and increased sample volume).

Continuous sampler operation.

CA #20-19 CR 2020-14182 10/15/20: Adequate sample volume collected during sample period. CR submitted to request clearing blockages of sample lines. REMP sampler placed on alternate supply line (on the right side of the unit).

02/04/21: FIN attempted to flush sample lines.

One line is unblocked, two lines are available as backup. AR 2021-01902 written to schedule replacement of sample lines.

Ideal sample collected for sample periods.

6 2020 REMP Atypical Sampling Occurrences (continued)

Date Sample Type Location Code(s)

Sample Period Reason for Occurrence(s)

Corrective Action OCT (cont.)

Air 12S1 10/21/20 to 10/28/20 (loss of 0.6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months ) 12kV power outage occurred on 10/26/20.

Loss of 0.6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months , as determined by timer box.

Non-continuous sampler operation.

CA #20-20 CR 2020-14619 10/26/20: No action required. Air monitor resumed normal operation when power was restored.

10/26/20: Operability verified @ 1411 hours0.0163 days 0.392 hours 0.00233 weeks 5.368855e-4 months .

Ideal sample collected for sample period:

20,900 cf.

Air 10S3 10/21/20 to 10/28/20 (loss of 0.9 hours1.041667e-4 days 0.0025 hours 1.488095e-5 weeks 3.4245e-6 months )

Power outage-date and time unknown.

Loss of 0.9 hours1.041667e-4 days 0.0025 hours 1.488095e-5 weeks 3.4245e-6 months , as determined by timer box during weekly collection.

Non-continuous sampler operation.

CA #20-21 CR 2020-14781 10/28/20: No action required. Air monitor resumed normal operation when power was restored.

10/28/20: Operability verified @ 1011 hours0.0117 days 0.281 hours 0.00167 weeks 3.846855e-4 months .

Ideal sample collected for sample period:

21,600 cf.

Direct Radiation 13S5 3rd Quarter (10/15/20)

Dosimeter holder and dosimeter for location 13S5 were unable to be located during quarterly exchange.

CR 2020-14190 10/15/20: New dosimeter holder installed, along with the 4th quarter 2020 dosimeter.

7 2020 REMP Atypical Sampling Occurrences (continued)

Date Sample Type Location Code(s)

Sample Period Reason for Occurrence(s)

Corrective Action NOV Air 12S1 11/11/20 to 11/18/20 (momentary loss of 12kV power)

Momentary loss of power on 11/15/20.

No loss of sampling time as determined by timer box.

Non-continuous sampler operation.

CA #20-22 CR 2020-15679 11/15/20: No action required. Air monitor resumed normal operation when power was restored.

11/16/20: Operability verified @ 0945 hours0.0109 days 0.263 hours 0.00156 weeks 3.595725e-4 months .

Ideal sample collected for sample period:

23,700 cf.

DEC Air 12S1 12/22/20 to 12/30/20 (momentary loss of 12kV power)

Momentary loss of power on 12/24/20.

No loss of sampling time as determined by timer box.

Non-continuous sampler operation.

CA #20-23 CR 2020-17191 & 2020-17192 12/24/20: No action required. Air monitor resumed normal operation when power was restored.

12/25/20: Operability verified @ 1320 hours0.0153 days 0.367 hours 0.00218 weeks 5.0226e-4 months .

Ideal sample collected for sample period:

25,300 cf.

Air 9B1 12/22/20 to 12/30/20 Timer box malfunction. Timer box not advancing on pace. Only 116.2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months recorded for the week.

No effect on monitoring.

Continuous sampler operation.

CA #20-24 CR 2020-17322 12/30/20: Timer box #7 replaced with timer box

9. Equipment restored to service @ 1000 hours0.0116 days 0.278 hours 0.00165 weeks 3.805e-4 months .

12/30/20: Operability verified @ 1006 hours0.0116 days 0.279 hours 0.00166 weeks 3.82783e-4 months .

Ideal sample collected for sample period:

24,800 cf.

8 D.

Quality Assurance Program Teledyne Brown Engineering The quality of the results obtained by TBE is ensured by the implementation of the Quality Assurance Program as described in the Teledyne Brown Engineering Quality Assurance Manual and the Teledyne Brown Engineering Procedure Manual.

E.

Summary of Results - Inter-Laboratory Comparison Program The TBE Laboratory analyzed Performance Evaluation (PE) samples of air particulate, air iodine, milk, soil, vegetation, and water matrices for various analytes. The PE samples supplied by Analytics Inc.,

Environmental Resource Associates (ERA) and Department of Energy (DOE) Mixed Analyte Performance Evaluation Program (MAPEP),

were evaluated against the following pre-set acceptance criteria:

1. Analytics Evaluation Criteria Analytics evaluation report provides a ratio of TBEs result and Analytics known value. Since flag values are not assigned by Analytics, TBE evaluates the reported ratios based on internal QC requirements based on the DOE MAPEP criteria.

2. ERA Evaluation Criteria ERAs evaluation report provides an acceptance range for control and warning limits with associated flag values. ERAs acceptance limits are established per the USEPA, National Environmental Laboratory Accreditation Conference (NELAC), state-specific Performance Testing (PT) program requirements or ERAs SOP for the Generation of Performance Acceptance Limits, as applicable.

The acceptance limits are either determined by a regression equation specific to each analyte or a fixed percentage limit promulgated under the appropriate regulatory document.

3. DOE Evaluation Criteria MAPEPs evaluation report provides an acceptance range with associated flag values. MAPEP defines three levels of performance:

Acceptable (flag = A) - result within +/- 20% of the reference value Acceptable with Warning (flag = W) - result falls in the

+/- 20% to +/- 30% of the reference value Not Acceptable (flag = N) - bias is greater than 30% of the reference value Note: The Department of Energy (DOE) Mixed Analyte Performance Evaluation Program (MAPEP) samples are created to mimic conditions found at DOE sites which do not resemble typical environmental samples obtained at commercial nuclear power facilities.

Teledyne Brown Engineering For the TBE laboratory, 126 out of 133 analyses performed met the specified acceptance criteria. Ten analyses did not meet the specified acceptance criteria for the following reasons and were addressed through the TBE Corrective Action Program.

1.

The MAPEP February 2020 AP U-233/234 and U-238 results were evaluated as Not Acceptable. The reported value for U-233/234 was 0.0416 +/- 0.0102 Bq/sample and the known result was 0.075 Bq/sample (acceptance range 0.053 - 0.098). The reported value for U-238 was 0.0388 +/- 0.00991 Bq/sample and the known result was 0.078 Bq/sample (acceptance range 0.055 - 0.101). This sample was run as the workgroup duplicate and had RPDs of 10.4% (U-234) and 11.7% (U-238).

After the known results were obtained, the sample was relogged. The filter was completely digested with tracer added originally; the R1 results were almost identical. It was concluded that the recorded tracer amount was actually double, causing the results to be skewed. Lab worksheets have been modified to verify actual tracer amount vs. LIMS data. TBE changed vendors for this cross-check to ERA MRAD during the 2nd half of 2020. Results were acceptable at 97.8% for U-234 and 106% for U-238. (NCR 20-13)

2.

The Analytics September 2020 milk Sr-89 result was evaluated as Not Acceptable. The reported value was 62.8 pCi/L and the known result was 95.4 (66%). All QC data was reviewed and there were no anomalies. This was the first failure for milk Sr-89 since 2013 and there have only been 3 upper/lower boundary warnings since that time. It is believed that there may have been some loss during the sample prep (ashing).

The December 2020 result was at 92% of the known. (NCR 20-19)

3.

The ERA October 2020 water I-131 result was evaluated as Not Acceptable. The reported value was 22.9 pCi/L and the known result was 28.2 (acceptance range 23.5 - 33.1). The reported result was 81% of the known, which passes TBE QC criteria. This was the first failure for water I-131. (NCR 20-17)

4.

The ERA October 2020 water Gross Alpha and Gross Beta results were evaluated as Not Acceptable. The reported/acceptable values and ranges are as follows:

Reported Known Range Gross Alpha 40.0 26.2 13.3 - 34.7 Gross Beta 47.5 69.1 48.0 - 76.0 All QC data was reviewed with no anomalies and a cause for failure could not be determined. This was the first failure for water Gross Beta. A Quick Response follow-up cross-check was analyzed as soon as possible with acceptable results at 96.8% for Gross Alpha and 102% for Gross Beta. (NCR 20-18)

5.

The MAPEP August 2020 soil Ni-63 result was evaluated as Not Acceptable. The reported value was 438 +/- 21.1 Bq/kg and the known result was 980 Bq/kg (acceptance range 686 -

1274). It is believed that some Ni-63 loss may have occurred during the sample prep. This investigation is still on-going at this time. (NCR 20-20)

The Inter-Laboratory Comparison Program provides evidence of in control counting systems and methods, and that the laboratories are producing accurate and reliable data.

IV.

Results and Discussion The analytical results of the 2020 REMP samples are divided into categories based on exposure pathways: atmospheric, direct radiation, terrestrial, and aquatic. The analytical results for the 2020 REMP are summarized in Appendix A, Program Summary. The data for individual samples are presented in Appendix C, Data Tables. The data are compared to the formal preoperational environmental monitoring program data (April 1972 to September 1982) and to data during operations. The data collected demonstrates that the SSES REMP was conducted in compliance with the TRM and the SSES ODCM.

A.

Atmospheric Atmospheric REMP sampling included the collection of air particulates, air iodine and direct radiation samples.

1.

Air Particulates Air particulate samples were collected weekly at six indicator locations (3S2, 9B1, 10S3, 12E1, 12S1 and 13S6) and one control locations (8G1). Each of the samples collected for the year were analyzed for gross beta. Quarterly composites of the weekly samples from each location were analyzed for specific gamma emitters.

Gross Beta Gross beta activity was detected in 312 of 312 of the indicator location samples at concentrations ranging from 6 to 29 E-3 pCi/m3 with an average concentration of 13 E-3 pCi/m3, and in 52 of 52 of the control location samples at concentrations ranging from 6 to 24 E-3 pCi/m3 with an average of 12 E-3 pCi/m3. Elevated gross beta results on both indicator and control stations can be seen the week of 9/23/20-9/30/20. The normal average for gross beta results (indicator and control) is 13 E-3 to 14 E-3 pCi/m3 whereas the average gross beta results for all locations the week of 9/23/20-9/30/20 was 26.9 E-3 pCi/m3. The increase is due to a possible radiological event in an eastern European country and it was seen at many other stations across the USA/Canada. The maximum preoperational level detected was 102 E-3 pCi/m3 with an average concentration of 62 E-3 pCi/m3. (Table C-1, Appendix C);

Historical levels of gross beta are shown in Figure C-1. Results for gross beta analysis from 1974 to current year are plotted.

Gamma Spectrometry Gamma spectrometry was performed on each of the 28 quarterly composite samples. Beryllium-7, attributed to cosmic ray activity in the atmosphere, was detected in all 24 indicator location composites at concentrations ranging from 68 E-3 to 149 E-3 pCi/m3 with an average concentration of 112 E-3 pCi/m3, and in the four control location composites ranging in concentration from 97 to 129 E-3 pCi/m3 with an average concentration of 111 E-3 pCi/m3.

The maximum preoperational level detected was 85 E-3 pCi/m3 with an average concentration of 74 E-3 pCi/m3. (Table C-2, Appendix C)

All other gamma emitters were less than the LLD.

2.

Air Iodine Filtered air iodine samples were collected weekly at six indicator locations (3S2, 9B1, 10S3, 12E1, 12S1, and 13S6) and one control locations (8G1). Each of the samples collected for the year were analyzed for I-131.

Iodine-131 Iodine-131 was not detected in any indicator location samples or control location samples. Preoperational data is not available for comparison. (Table C-3, Appendix C)

B.

Direct Radiation Ambient radiation levels in the environs were measured with a pair of optically stimulated luminescent dosimeters (OSLD) composed of aluminum oxide crystals supplied and processed by Landauer.

Packets containing OSLDs for quarterly exposure were placed in the owner-controlled area and around the site at various distances and in each land-based meteorological sector. Emphasis was placed on special interest areas such as population centers, nearby residences, and schools.

A total of 57 locations were monitored for direct radiation during 2020, including 32 site boundary locations, 14 outer distant locations, six special interest locations and five control locations.

The indicator locations annual average dose rate was 17.6 milliroentgen per standard quarter. The annual average dose rate for the control locations was 15.6 milliroentgen per standard quarter. The preoperational average for the quarterly direct radiation readings was 17.6 milliroentgen per standard quarter. The results of the direct radiation measurements for 2020 confirmed that the radiation levels in the vicinity of the SSES were similar to previous years. (Table C-4, Appendix C); Figure C Ambient Radiation Levels Based on Environmental Dosimetry Data from 1973 to current year are plotted as quarterly averages.

C.

Terrestrial Terrestrial REMP sampling included the collection of milk, groundwater, drinking water, and vegetation.

1.

Milk Milk samples were collected biweekly when cows were on pasture and monthly when cows were not grazing on pasture.

Animals are considered on pasture from April to October of each year. Samples were collected in new polyethylene containers and transported in ice chests with preservatives added to the milk.

Milk samples were collected at local dairy farms from 2 indicator locations (5E2 and 13E3) and one control location (10G1). Each sample was analyzed for I-131 and gamma emitters.

Iodine-131 Iodine-131 was not detected above minimum detectable concentration in any of the 60 samples analyzed.

Preoperational data is not available for comparison. (Table C-5, Appendix C); Figure C Iodine-131 Activity in Milk results from 1976 to 2020 are plotted.

Gamma Spectrometry Naturally occurring K-40 was detected in all 60 samples with concentrations for the 40 indicator location samples ranging from 1,064 to 1,412 pCi/L with an average concentration of 1,248 pCi/L, and the 20 control location sample concentrations ranging from 1,127 to 1,509 pCi/L with an average concentration of 1,297 pCi/L. The maximum preoperational level detected was 1,500 pCi/L with an average concentration of 1,358 pCi/L.

All other gamma emitters were less than the LLD.

2. Groundwater An expanded groundwater monitoring network was initiated in 2006 for the SSES as part of a site-wide hydrogeological investigation in accordance with the Nuclear Energy Institute (NEI) Groundwater Protection Initiative (GPI). The additional groundwater monitoring wells are sampled as part of the Radiological Environmental Monitoring Program (REMP) to regularly assess groundwater quality and provide early detection of any inadvertent leaks or spills of radioactive materials that could reach groundwater. Groundwater is sampled quarterly and analyzed for H-3 and gamma activity.

Additionally, precipitation sampling was initiated in 2007 and analyzed for H-3 activity to assess the influence of station airborne H-3 emissions on groundwater H-3 activities.

Precipitation washout monitoring data is not used in dose calculations; however, the data does give a gross indication of H-3 which makes its way into surface water and soil where it eventually seeps into shallow groundwater. The annual average H-3 concentrations in precipitation, groundwater monitoring wells and surface water are summarized in Table C-7 and graphically depicted in Figure C Annual Average Tritium Activity (pCi/L) in Precipitation and Surface Water Versus Groundwater.

Groundwater samples were collected quarterly at 10 indicator locations (1S3, 1S4, 4S8, 4S9, 8S4, 7S10, 2S8, 6S11A, 6S12 and 7S11) and one control station (13S7). Each sample was analyzed for H-3 and gamma emitters.

Tritium Tritium activity was detected above the minimum detectable concentration in 9 of the 36 indicator location samples with concentrations ranging from 129 to 281 pCi/L with an average concentration of 215 pCi/L. Two of the four control location samples had tritium activity above the minimum detectable concentration with a range of 188 to 296 pCi/L and a concentration of 242 pCi/L. The maximum preoperational level detected was 119 pCi/L. (Table C-6, Appendix C); Figure C-4

- Annual Average Tritium Activity (pCi/L) in Precipitation and Surface Water Versus Groundwater results from 2007 to 2020 are plotted.

Gamma Spectrometry Naturally occurring K-40 was not detected in any of the indicator or control samples. Preoperational data is not available for comparison. (Table C-6, Appendix C)

All other gamma emitters were less than the LLD.

3.

Drinking Water Drinking water samples were collected monthly from one location (12H2). Each sample was analyzed for gross beta, H-3 and gamma emitters.

Gross Beta Gross beta activity was detected in six of the 12 drinking water samples. Sample concentrations ranged from 2.6 to 4.1 pCi/L with an average concentration of 3.2 pCi/L. The maximum preoperational level detected was 2.8 pCi/L with an average concentration of 1.8 pCi/L. (Table C-8, Appendix C); Figure C Gross Beta Activity in Drinking Water results from 1977 to 2020 are plotted.

Tritium Tritium activity was not detected in any of the samples. The maximum preoperational level detected was 194 pCi/L with an average of 132 pCi/L. (Table C-8, Appendix C)

Gamma Spectrometry Naturally occurring K-40 was not detected in any of the samples. Preoperational data is not available for comparison.

(Table C-8, Appendix C)

All other gamma emitters were less than the LLD.

4. Food Products Food products from three indicator locations (11D1, 11S6, and 12F7) were collected throughout the growing season. All samples (fruit, vegetable, and broadleaf) were analyzed for gamma emitters and included soy beans, field corn, pumpkin, green beans, swiss chard and collards.

Gamma Spectrometry Naturally occurring Be-7, attributed to cosmic ray activity in the atmosphere, was detected in five of the 15 indicator location samples with concentrations ranging from 272 to 446 pCi/kg wet with an average concentration of 332 pCi/kg wet.

Preoperational data is not available for comparison.

Naturally occurring K-40 was detected in all 15 indicator location samples with concentrations ranging from 2,490 to 15,000 pCi/kg wet with an average concentration of 4,474 pCi/kg wet. The maximum preoperational level detected was 4,800 pCi/kg wet with an average concentration of 2,140 pCi/kg wet.

Naturally occurring Ac-228 was not detected in any of the indicator or control locations. Preoperational data is not available for comparison.

Naturally occurring Th-228 was not detected in any of the indicator or control locations. Preoperational data is not available for comparison. (Table C-9, Appendix C)

All other gamma emitters were less than the LLD.

D.

Aquatic Aquatic samples include surface water, fish, and sediment samples.

1.

Surface Water Surface water samples were collected routinely at two indicator locations (6S5 and 2S7) and two control locations (5S9 and 6S6). Each sample was analyzed for H-3 and gamma emitters.

In 2020, a new auto-composite sampler was installed at surface water sample location 6S6. Installation of the new sampler started on August 31, 2020. Initial sampler setup by the vendor was delayed due to the need to obtain additional parts.

Further delays with the installation were encountered due to the need to install two (2) new pressure control valves (PCVs).

The new auto composite sampler at location 6S6 was placed in service on October 13, 2020.

Tritium Tritium activity was detected in 12 of 26 indicator location samples with concentrations ranging from 165 to 9,190 pCi/L with an average concentration of 1,580 pCi/L. The range of H-3 levels in surface water are biased high due to inclusion of samples from the cooling tower blowdown line (CTBD; location 2S7). Routine station operation includes infrequent batch releases of slightly radioactive water which are discharged into the CTBD. When the H-3 concentration from CTBD samples is averaged with those obtained from Susquehanna River downstream monitoring locations, the result is an overall indicator location average that is higher than the actual average H-3 levels of the downstream river water. No radioactivity attributable to station operations was identified above analysis detection levels in any samples from the Susquehanna River in 2020. Tritium was detected in one of the 12 control location samples with an average concentration of 169 pCi/L. The maximum preoperational level detected was 319 pCi/L, with an average concentration of 140 pCi/L. (Table C-10, Appendix C)

Figure C Tritium Activity in Surface Water, results from 1972 to 2020 are plotted.

Gamma Spectrometry Naturally occurring K-40 was not detected in any of the indicator location or control location samples. Preoperational data is not available for comparison.

Iodine-131 was not detected in any of the indicator or control samples. The maximum preoperational level detected was 0.43 pCi/L, with an average concentration of 0.33 pCi/L. (Table C-10, Appendix C)

Preoperational data is not available for comparison. (Table C-10, Appendix C)

All other gamma emitters were less than the LLD.

2.

Fish Edible species of fish were collected in the spring and fall of 2020 at two indicator locations (IND [Susquehanna River] and LTAW (only collected in the fall)) and one control location (2H

[Susquehanna River]). Each sample was analyzed for gamma emitters.

Gamma Spectrometry Naturally occurring K-40 was detected in all indicator location samples at concentrations ranging from 2,791 to 4,117 pCi/kg wet with an average concentration of 3,547 pCi/kg wet, and in all control location samples at concentrations ranging from 2,629 to 3,759 pCi/kg wet with an average concentration of 3,166 pCi/kg wet. The maximum preoperational level detected was 3,600 pCi/kg dry with an average concentration of 3,871 pCi/kg dry. (Table C-11, Appendix C)

All other gamma emitters were less than the LLD.

3.

Shoreline Sediment Sediment samples were collected from the Susquehanna River in the spring and fall at two indicator locations (7B and 12F) and one control location (2B). Each sample was analyzed for gamma emitters.

Gamma Spectroscopy Naturally occurring K-40 was detected in all four of the indicator location samples at concentrations ranging from 9,725 to 15,790 pCi/kg dry with an average concentration of 12,060 pCi/kg dry, and in all of the control location samples with concentrations ranging from 9,175 to 18,220 pCi/kg dry with an average concentration of 13,700 pCi/kg dry. The maximum preoperational level detected was 11,000 pCi/kg dry with an average concentration of 8,500 pCi/kg dry.

Cesium-137 was not detected in any of the indicator or control location samples. The maximum preoperational level detected was 210 pCi/kg dry with an average concentration of 110 pCi/kg dry.

Naturally occurring Ra-226 was not detected in any of the indicator or control location samples. The maximum preoperational level detected was 1,900 pCi/kg dry with an average concentration of 700 pCi/kg dry.

Naturally occurring Ac-228 was detected in all four indicator location samples at concentrations ranging from 817 to 1,430 pCi/kg dry with an average concentration of 1,092 pCi/kg dry, and in both of the control location samples at concentrations ranging from 989 to 1,411 pCi/kg dry with an average concentration of 1,200 pCi/kg dry. Preoperational data is not available for comparison. (Table C-12, Appendix C)

Naturally occurring Th-228 was detected in all of the four indicator location samples at concentrations ranging from 773 to 1,114 pCi/kg dry with an average concentration of 990 pCi/kg dry, and in both of the control location samples at concentrations ranging from 856 and 1,339 pCi/kg dry with an average concentration of 1,098 pCi/kg dry. The maximum preoperational level detected was 3,200 pCi/kg dry with an average concentration of 1,300 pCi/kg dry.

All other gamma emitters were less than the LLD.

E.

Land Use Census SYNOPSIS OF 2020 LAND USE CENSUS Applied Ecoscience, Inc. conducted a Land Use Census during the 2020 growing season around SSES to comply with the ODCM. The purpose of the survey was to document the nearest milk animal, residence and garden greater than 50 m2 (approximately 500 ft2) producing broad leaf vegetation within a distance of 8 km (approximately 5 miles) in each of the 16 meteorological sectors surrounding the SSES.

Distance in Miles from the SUSQUEHANNA NUCLEAR Reactor Buildings Meteorological Sector Nearest Residence July-Aug, 2020 miles Nearest Garden July-Sept, 2020 miles Nearest Dairy Farm July-Aug, 2020 miles 1 N 1.3 3.2

>5.0 2 NNE 1.0 2.3 a,c,e

>5.0 3 NE 0.9 2.7

>5.0 4 ENE 2.1 2.4 a,c

>5.0 5 E 1.6 4.9 4.5 d 6 ESE 0.5 3.1

>5.0 7 SE 0.6 0.6

>5.0 8 SSE 0.7 2.9

>5.0 9 S 1.0 3.5

>5.0 10 SSW 0.9 1.3 a,c

>5.0 d 11 SW 1.5 4.2

>5.0 12 WSW 1.3 1.3 1.7 13 W 1.2 3.2 5.0 14 WNW 1.1 3.6

>5.0 15 NW 0.8 2.3

>5.0 16 NNW 0.7 4.0

>5.0 a Chickens raised for consumption at this location b Ducks raised for consumption at this location c Eggs consumed from chickens at this location d Fruits/vegetables raised for consumption at this location e Beef cattle raised for consumption at this location f Rabbits raised for consumption at this location.

The 2020 Land Use Census results are summarized in the above table.

V.

Annotations to Previous AREOR There are no annotations to the previous AREOR.

VI.

Conclusions The Radiological Environmental Monitoring Program for SSES was conducted during 2020 in accordance with the SSES TRM and ODCM. The LLD values required by the TRM and ODCM were achieved for this reporting period (See Appendix A and Appendix C). The objectives of the program were also met during this period. The data collected assists in demonstrating that SSES was operated in compliance with TRM and ODCM requirements.

The concentration of radioactive material in the environment that could be attributable to SSES operations was only a small fraction of the concentration of naturally occurring and man-made radioactivity. Since these results were comparable to the results obtained during the preoperational phase of the program, which ran from 1972 to 1982, and with results collected since commercial operation, it is concluded that operation of the SSES had no significant radiological impact on the health and safety of the public or the environment.

From the results obtained, it can be concluded that the levels and fluctuations of radioactivity in environmental samples were as expected for the environment surrounding the SSES.

VII.

References

[1]

Annual Radiological Environmental Operating Report, January 1 to December 31, 2020, prepared by Teledyne Brown Engineering, Knoxville TN.

[2]

Final Safety Analysis Report

[3]

Final Environmental Statement

[4]

Susquehanna Steam Electric Station, 2020 Land Use Census. Prepared for Susquehanna Nuclear, LLC, Berwick, PA. December 2020. Applied Ecoscience, Inc. Berwick, PA.

[5]

Google Earth. 2016. Website: http://earth.google.com.

[6]

Pennsylvania Department of Transportation. 1990. Columbia County General Highway Map. PA DOT, Harrisburg, PA.

[7]

Pennsylvania Department of Transportation. 1990. Luzerne County General Highway Map. PA DOT, Harrisburg, PA.

[8]

Susquehanna Nuclear, LLC. 2015. Radiological Environmental Monitoring Program, ODCM-QA-008, Rev. 18.

[9]

Susquehanna Steam Electric Station, 5-mile radius aerial photograph, REMPE-182244-0. Susquehanna Nuclear, Berwick, PA

[10]

United States Geological Survey. 1976. Berwick Quadrangle Topographic Map. 7.5 minute series. USGS, Reston, VA.

[11]

United States Geological Survey. 1977. Sybertsville Quadrangle Topographic Map. 7.5 minute series. USGS, Reston, VA.

[12]

United States Nuclear Regulatory Commission. An Acceptable Radiological Environmental Monitoring Program. Radiological Assessment Branch Technical Position. November 1979, Revision 1. USNRC, Washington, DC.

[13]

Susquehanna Nuclear, Engineering Study, EC-ENVR-1012 (Revision 2, February 2013), Interpretation of Environmental Direct Radiation Results.

[14]

Susquehanna Nuclear, Tritium Release REMP Calculation (RETDAS)

V.3.6.6) - March 2017.

[15]

NCRP Report No. 160, Ionizing Radiation Exposure of the Population of the United States, (2009).

APPENDIX A PROGRAM

SUMMARY

A-1

LOWER LIMIT NUMBER OF MEDIUM OR PATHWAY OF CONTROL LOCATION NONROUTINE SAMPLED DETECTION MEAN (3)

NAME MEAN (3)

MEAN (3)

REPORTED (UNIT OF MEASUREMENT)

(LLD) (2)

RANGE DISTANCE AND DIRECTION RANGE RANGE MEASURMENTS (4)

Air Particulates GR-B 364 10 1.307E+01 (312/312) 13S6 1.347E+01 (52/52) 1.199E+01 (52/52) 0 (E-3 pCi/m3) 0.4 MILES W (7.250E+00 - 2.700E+01)

GAMMA 28 BE-7 28 N/A 1.124E+02 (24/24) 9B1 1.253E+02 (4/4) 1.114E+02 (4/4) 0 1.3 MILES SSW (1.041E+02 - 1.359E+02)

(9.680E+01 - 1.291E+02)

K-40 28 N/A

<MDC (0/24)

<MDC (0/4) 0 CS-134 28 50

<MDC (0/24)

<MDC (0/4) 0 CS-137 28 60

<MDC (0/24)

<MDC (0/4) 0 Charcoal GAMMA 364 (E-3 pCi/m3)

I-131 364 70

<MDC (0/312)

<MDC (0/52) 0 Ambient Radiation OSLD 227 N/A 1.764E+01 (207/207) 9S2 3.998E+01 (4/4) 1.559E+01 (20/20) 0 (mR/std. qtr.)

0.2 MILES S (3.625E+01 - 4.628E+01)

(1.321E+01 - 1.885E+01)

Milk I-131 60 1

<MDC (0/40)

<MDC (0/20) 0 (pCi/Liter)

GAMMA 60 K-40 60 N/A 1.248E+03 (40/40) 13E3 1.304E+03 (20/20) 1.297E+03 (20/20) 0 5.0 MILES W (1.107E+03 - 1.412E+03)

(1.127E+03 - 1.509E+03)

CS-134 60 15

<MDC (0/40)

<MDC (0/20) 0

<MDC

<MDC (1.009E+01 - 4.628E+01)

<MDC TABLE A

SUMMARY

OF DATA FOR SSES OPERATIONAL RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM NAME OF FACILITY: SUSQUEHANNA STEAM ELECTRIC STATION LOCATION OF FACILITY: LUZERNE COUNTY, PENNSYLVANIA ANALYSIS AND TOTAL NUMBER OF ANALYSIS PERFORMED (1)

LOCATION WITH HIGHEST MEAN ALL INDICATOR LOCATIONS Reporting Period: December 28, 2019 to January 01, 2021

<MDC

<MDC (5.580E+00 - 2.990E+01)

(6.460E+00 - 2.430E+01)

(6.842E+01 - 1.494E+02)

(1.064E+03 - 1.412E+03)

A-2

LOWER LIMIT NUMBER OF MEDIUM OR PATHWAY OF CONTROL LOCATION NONROUTINE SAMPLED DETECTION MEAN (3)

NAME MEAN (3)

MEAN (3)

REPORTED (UNIT OF MEASUREMENT)

(LLD) (2)

RANGE DISTANCE AND DIRECTION RANGE RANGE MEASURMENTS (4)

TABLE A

SUMMARY

OF DATA FOR SSES OPERATIONAL RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM NAME OF FACILITY: SUSQUEHANNA STEAM ELECTRIC STATION LOCATION OF FACILITY: LUZERNE COUNTY, PENNSYLVANIA ANALYSIS AND TOTAL NUMBER OF ANALYSIS PERFORMED (1)

LOCATION WITH HIGHEST MEAN ALL INDICATOR LOCATIONS Reporting Period: December 28, 2019 to January 01, 2021 Milk (cont'd)

CS-137 60 18

<MDC (0/40)

<MDC (0/20) 0 (pCi/Liter)

BA-140 60 60

<MDC (0/40)

<MDC (0/20) 0 LA-140 60 15

<MDC (0/40)

<MDC (0/20) 0 TH-228 60 N/A

<MDC (0/40)

<MDC (0/20) 0 Ground Water H-3 41 2000 2.153E+02 (9/37) 13S7 2.420E+02 (2/4) 2.420E+02 (2/4) 0 (pCi/Liter) 0.2 MILES W (1.880E+02 - 2.960E+02)

(1.880E+02 - 2.960E+02)

GAMMA 41 K-40 41 N/A

<MDC (0/36)

<MDC (0/4) 0 MN-54 41 15

<MDC (0/36)

<MDC (0/4) 0 CO-58 41 15

<MDC (0/36)

<MDC (0/4) 0 FE-59 41 30

<MDC (0/36)

<MDC (0/4) 0 CO-60 41 15

<MDC (0/36)

<MDC (0/4) 0

<MDC

<MDC (1.290E+02 - 2.810E+02)

A-3

LOWER LIMIT NUMBER OF MEDIUM OR PATHWAY OF CONTROL LOCATION NONROUTINE SAMPLED DETECTION MEAN (3)

NAME MEAN (3)

MEAN (3)

REPORTED (UNIT OF MEASUREMENT)

(LLD) (2)

RANGE DISTANCE AND DIRECTION RANGE RANGE MEASURMENTS (4)

TABLE A

SUMMARY

OF DATA FOR SSES OPERATIONAL RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM NAME OF FACILITY: SUSQUEHANNA STEAM ELECTRIC STATION LOCATION OF FACILITY: LUZERNE COUNTY, PENNSYLVANIA ANALYSIS AND TOTAL NUMBER OF ANALYSIS PERFORMED (1)

LOCATION WITH HIGHEST MEAN ALL INDICATOR LOCATIONS Reporting Period: December 28, 2019 to January 01, 2021 Ground Water (cont'd)

ZN-65 41 30

<MDC (0/36)

<MDC (0/4) 0 (pCi/Liter)

NB-95 41 15

<MDC (0/36)

<MDC (0/4) 0 ZR-95 41 30

<MDC (0/36)

<MDC (0/4) 0 I-131 41 15

<MDC (0/36)

<MDC (0/4) 0 CS-134 41 15

<MDC (0/36)

<MDC (0/4) 0 CS-137 41 18

<MDC (0/36)

<MDC (0/4) 0 BA-140 41 60

<MDC (0/36)

<MDC (0/4) 0 LA-140 41 15

<MDC (0/36)

<MDC (0/4) 0 TH-228 41 N/A

<MDC (0/36)

<MDC (0/4) 0 Drinking Water GR-B 12 4

3.160E+00 (6/12) 12H2 3.160E+00 (6/12) 0 (pCi/Liter) 26 MILES WSW (2.620E+00 - 4.130E+00)

H-3 12 2000

<MDC (0/12) 0 (2.620E+00 - 4.130E+00)

<MDC

<MDC N/A N/A A-4

LOWER LIMIT NUMBER OF MEDIUM OR PATHWAY OF CONTROL LOCATION NONROUTINE SAMPLED DETECTION MEAN (3)

NAME MEAN (3)

MEAN (3)

REPORTED (UNIT OF MEASUREMENT)

(LLD) (2)

RANGE DISTANCE AND DIRECTION RANGE RANGE MEASURMENTS (4)

TABLE A

SUMMARY

OF DATA FOR SSES OPERATIONAL RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM NAME OF FACILITY: SUSQUEHANNA STEAM ELECTRIC STATION LOCATION OF FACILITY: LUZERNE COUNTY, PENNSYLVANIA ANALYSIS AND TOTAL NUMBER OF ANALYSIS PERFORMED (1)

LOCATION WITH HIGHEST MEAN ALL INDICATOR LOCATIONS Reporting Period: December 28, 2019 to January 01, 2021 Drinking Water (cont'd)

GAMMA 12 (pCi/Liter)

K-40 12 N/A

<MDC (0/12) 0 MN-54 12 15

<MDC (0/12) 0 CO-58 12 15

<MDC (0/12) 0 FE-59 12 30

<MDC (0/12) 0 CO-60 12 15

<MDC (0/12) 0 ZN-65 12 30

<MDC (0/12) 0 NB-95 12 15

<MDC (0/12) 0 ZR-95 12 30

<MDC (0/12) 0 I-131 12 15

<MDC (0/12) 0 CS-134 12 15

<MDC (0/12) 0

<MDC N/A

<MDC N/A N/A N/A

<MDC N/A N/A

<MDC

<MDC A-5

LOWER LIMIT NUMBER OF MEDIUM OR PATHWAY OF CONTROL LOCATION NONROUTINE SAMPLED DETECTION MEAN (3)

NAME MEAN (3)

MEAN (3)

REPORTED (UNIT OF MEASUREMENT)

(LLD) (2)

RANGE DISTANCE AND DIRECTION RANGE RANGE MEASURMENTS (4)

TABLE A

SUMMARY

OF DATA FOR SSES OPERATIONAL RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM NAME OF FACILITY: SUSQUEHANNA STEAM ELECTRIC STATION LOCATION OF FACILITY: LUZERNE COUNTY, PENNSYLVANIA ANALYSIS AND TOTAL NUMBER OF ANALYSIS PERFORMED (1)

LOCATION WITH HIGHEST MEAN ALL INDICATOR LOCATIONS Reporting Period: December 28, 2019 to January 01, 2021 Drinking Water (cont'd)

CS-137 12 18

<MDC (0/12) 0 (pCi/Liter)

BA-140 12 60

<MDC (0/12) 0 LA-140 12 15

<MDC (0/12) 0 Food/Garden Crops GAMMA 15 (pCi/kg wet)

BE-7 15 N/A 3.323E+02 (5/15) 11S6 3.323E+02 (5/10) 0 0.5 MILES SW (2.717E+02 - 4.459E+02)

K-40 15 N/A 4.474E+03 (15/15) 11D1 6.790E+03 (3/3) 0 3.3 MILES SW (2.490E+03 - 1.500E+04)

MN-54 15 N/A

<MDC (0/15) 0 CO-58 15 N/A

<MDC (0/15) 0 FE-59 15 N/A

<MDC (0/15) 0 CO-60 15 N/A

<MDC (0/15) 0 ZN-65 15 N/A

<MDC (0/15) 0 (2.717E+02 - 4.459E+02)

N/A N/A

<MDC

<MDC N/A

<MDC N/A N/A N/A N/A (2.490E+03 - 1.500E+04)

N/A

<MDC

<MDC A-6

LOWER LIMIT NUMBER OF MEDIUM OR PATHWAY OF CONTROL LOCATION NONROUTINE SAMPLED DETECTION MEAN (3)

NAME MEAN (3)

MEAN (3)

REPORTED (UNIT OF MEASUREMENT)

(LLD) (2)

RANGE DISTANCE AND DIRECTION RANGE RANGE MEASURMENTS (4)

TABLE A

SUMMARY

OF DATA FOR SSES OPERATIONAL RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM NAME OF FACILITY: SUSQUEHANNA STEAM ELECTRIC STATION LOCATION OF FACILITY: LUZERNE COUNTY, PENNSYLVANIA ANALYSIS AND TOTAL NUMBER OF ANALYSIS PERFORMED (1)

LOCATION WITH HIGHEST MEAN ALL INDICATOR LOCATIONS Reporting Period: December 28, 2019 to January 01, 2021 Food/Garden Crops (cont'd) NB-95 15 N/A

<MDC (0/15) 0 (pCi/kg wet)

ZR-95 15 N/A

<MDC (0/15) 0 I-131 15 60

<MDC (0/15) 0 CS-134 15 60

<MDC (0/15) 0 CS-137 15 80

<MDC (0/15) 0 BA-140 15 N/A

<MDC (0/15) 0 LA-140 15 N/A

<MDC (0/15) 0 AC-228 15 N/A

<MDC (0/15) 0 TH-228 15 N/A

<MDC (0/15) 0 N/A N/A N/A N/A N/A N/A N/A

<MDC

<MDC N/A N/A

<MDC

<MDC A-7

LOWER LIMIT NUMBER OF MEDIUM OR PATHWAY OF CONTROL LOCATION NONROUTINE SAMPLED DETECTION MEAN (3)

NAME MEAN (3)

MEAN (3)

REPORTED (UNIT OF MEASUREMENT)

(LLD) (2)

RANGE DISTANCE AND DIRECTION RANGE RANGE MEASURMENTS (4)

TABLE A

SUMMARY

OF DATA FOR SSES OPERATIONAL RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM NAME OF FACILITY: SUSQUEHANNA STEAM ELECTRIC STATION LOCATION OF FACILITY: LUZERNE COUNTY, PENNSYLVANIA ANALYSIS AND TOTAL NUMBER OF ANALYSIS PERFORMED (1)

LOCATION WITH HIGHEST MEAN ALL INDICATOR LOCATIONS Reporting Period: December 28, 2019 to January 01, 2021 Surface Water H-3 38 2000 1.580E+03 (12/26) 2S7 1.580E+03 (12/12) 1.690E+02 (1/12) 0 (pCi/Liter) 0.1 MILES NNE (1.650E+02 - 9.190E+03)

(1.690E+02)

GAMMA 38 K-40 38 N/A

<MDC (0/26)

<MDC (0/12) 0 MN-54 38 15

<MDC (0/26)

<MDC (0/12) 0 CO-58 38 15

<MDC (0/26)

<MDC (0/12) 0 FE-59 38 30

<MDC (0/26)

<MDC (0/12) 0 CO-60 38 15

<MDC (0/26)

<MDC (0/12) 0 ZN-65 38 30

<MDC (0/26)

<MDC (0/12) 0 NB-95 38 15

<MDC (0/26)

<MDC (0/12) 0 ZR-95 38 30

<MDC (0/26)

<MDC (0/12) 0 I-131 38 15

<MDC (0/26)

<MDC (0/12) 0

<MDC

<MDC (1.650E+02 - 9.190E+03)

<MDC A-8

LOWER LIMIT NUMBER OF MEDIUM OR PATHWAY OF CONTROL LOCATION NONROUTINE SAMPLED DETECTION MEAN (3)

NAME MEAN (3)

MEAN (3)

REPORTED (UNIT OF MEASUREMENT)

(LLD) (2)

RANGE DISTANCE AND DIRECTION RANGE RANGE MEASURMENTS (4)

TABLE A

SUMMARY

OF DATA FOR SSES OPERATIONAL RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM NAME OF FACILITY: SUSQUEHANNA STEAM ELECTRIC STATION LOCATION OF FACILITY: LUZERNE COUNTY, PENNSYLVANIA ANALYSIS AND TOTAL NUMBER OF ANALYSIS PERFORMED (1)

LOCATION WITH HIGHEST MEAN ALL INDICATOR LOCATIONS Reporting Period: December 28, 2019 to January 01, 2021 Surface Water (cont'd)

CS-134 38 15

<MDC (0/26)

<MDC (0/12) 0 (pCi/Liter)

CS-137 38 18

<MDC (0/26)

<MDC (0/12) 0 BA-140 38 60

<MDC (0/26)

<MDC (0/12) 0 LA-140 38 15

<MDC (0/26)

<MDC (0/12) 0 TH-228 38 N/A

<MDC (0/26)

<MDC (0/12) 0 Fish GAMMA 14 (pCi/kg wet)

K-40 14 N/A 3.547E+03 (8/8)

LTAW 3.795E+03 (2/2) 3.166E+03 (6/6) 0 0.7 MILES NE-ESE (3.588E+03 - 4.002E+03)

(2.629E+03 - 3.759E+03)

MN-54 14 130

<MDC (0/8)

<MDC (0/6) 0 CO-58 14 130

<MDC (0/8)

<MDC (0/6) 0 FE-59 14 260

<MDC (0/8)

<MDC (0/6) 0 CO-60 14 130

<MDC (0/8)

<MDC (0/6) 0 (2.791E+03 - 4.117E+03)

<MDC

<MDC A-9

LOWER LIMIT NUMBER OF MEDIUM OR PATHWAY OF CONTROL LOCATION NONROUTINE SAMPLED DETECTION MEAN (3)

NAME MEAN (3)

MEAN (3)

REPORTED (UNIT OF MEASUREMENT)

(LLD) (2)

RANGE DISTANCE AND DIRECTION RANGE RANGE MEASURMENTS (4)

TABLE A

SUMMARY

OF DATA FOR SSES OPERATIONAL RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM NAME OF FACILITY: SUSQUEHANNA STEAM ELECTRIC STATION LOCATION OF FACILITY: LUZERNE COUNTY, PENNSYLVANIA ANALYSIS AND TOTAL NUMBER OF ANALYSIS PERFORMED (1)

LOCATION WITH HIGHEST MEAN ALL INDICATOR LOCATIONS Reporting Period: December 28, 2019 to January 01, 2021 Fish (cont'd)

ZN-65 14 260

<MDC (0/8)

<MDC (0/6) 0 (pCi/kg wet)

CS-134 14 130

<MDC (0/8)

<MDC (0/6) 0 CS-137 14 150

<MDC (0/8)

<MDC (0/6) 0 Sediment GAMMA 6

(pCi/kg dry)

K-40 6

N/A 1.206E+04 (4/4) 2B 1.370E+04 (2/2) 1.370E+04 (2/2) 0 1.6 MILES NNE (9.175E+03 - 1.822E+04)

(9.175E+03 - 1.822E+04)

CS-134 6

150

<MDC (0/4)

<MDC (0/2) 0 CS-137 6

180

<MDC (0/4)

<MDC (0/2) 0 RA-226 6

N/A

<MDC (0/4)

<MDC (0/2) 0 AC-228 6

N/A 1.092E+03 (4/4) 12F 1.205E+03 (2/2) 1.200E+03 (2/2) 0 6.9 MILES WSW (9.791E+02 - 1.430E+03)

(9.891E+02 - 1.411E+03)

TH-228 6

N/A 9.902E+02 (4/4) 2B 1.098E+03 (2/2) 1.098E+03 (2/2) 0 1.6 MILES NNE (8.561E+02 - 1.339E+03)

(8.561E+02 - 1.339E+03)

1. The total number of analyses does not include duplicates, splits or repeated analyses.

2. The Technical Requirement LLDs are shown when applicable.

3. The mean and range are based on all results above MDC. The ratio indicated in parentheses is the total number of results used to calculate the mean to the total number of samples.

4. USNRC Reporting Levels are specified in the Technical Requirements (i.e., when Reporting Levels in Technical Requirements are exceeded).

(8.167E+02 - 1.430E+03)

(7.726E+02 - 1.114E+03)

<MDC

<MDC (9.725E+03 - 1.579E+04)

A-10

APPENDIX B SAMPLE DESIGNATION AND LOCATIONS B-1

SAMPLE DESIGNATION All distances from the SSES to monitoring locations are measured from the standby gas treatment vent at 44200/N34117 (Pa. Grid System). The location codes are based on both distance and direction from the SSES. The letters in the location codes indicate if the monitoring locations are on site (within the site boundary) or, if they are not on site, the approximate distances of the location from the SSES as described below:

S

= On site E

= 4 - 5 miles A

= < 1 mile F

= 5 - 10 miles B

= 1 - 2 miles G

= 10 - 20 miles C

= 2 - 3 miles H = > 20 miles D

= 3 - 4 miles The numbers preceding the letters in the location codes provide the direction of the monitoring locations from the SSES by indicating the sectors in which they are located. A total number of 16 sectors (numbered one through 16) equally divide an imaginary circle on a map of the SSES and its vicinity, with the SSES at the center of the circle. The middle of sector one is directed due North (N). Moving clockwise from sector one, the sector immediately adjacent to sector one is sector two, the middle of which is directed due north, north east (NNE). Continuing to move clockwise the sector number increases to 16, which is the north northwest sector (NNW).

B-2

TABLE B-1 SAMPLING LOCATIONS Specific information about the individual sampling locations are given in Table B-1. Maps B-1 through B-6 show the locations of sampling stations with respect to the Site. A Portable Global Positioning System (GPS) was used to provide the coordinates of sampling locations.

STATION CODE STATION LOCATION LATITUDINAL LONGITUDINAL SAMPLE TYPE LESS THAN ONE MILE FROM THE SSES DEG.

DEG.

2S7 0.1 mi.NNE 41.093540

-76.144773 Surface water 6S5 0.9 mi.ESE; 41.084639

-76.130642 Surface water 6S6 **

0.8 mi.ESE; 41.088115

-76.131637 Surface water LTAW 0.7 mi.NE-ESE; 41.098356

-76.135401 Fish 10S3 0.6 mi. SSW; 41.085264

-76.152128 Air 12S1 0.4 mi.WSW; 41.088436

-76.154314 Air 13S6 0.4 mi.W; 41.091771

-76.153869 Air 3S2 0.5 mi NE; 41.095716

-76.140207 Air 1S4 0.1 mi N; 41.093302

-76.145853 Ground water 2S8 0.1 mi.NNE; 41.094991

-76..044207 Ground water 6S11A 0.4 mi.ESE; 41.083448

-76.133412 Ground water 6S12 0.8 mi.ESE; 41.083411

-76.116935 Ground water 7S11 0.3 mi.SE; 41.083527

-76.133513 Ground water 1S3 0.1 mi N; 41.093640

-76.146076 Ground water 4S8 0.1 mi.ENE; 41.092306

-76.144283 Ground water 4S9 0.3 mi.E; 41.093369

-76.141644 Ground water 8S4 0.1 mi.SSE; 41.091424

-76.145531 Ground water 7S10 0.3 mi.SE; 41.089736

-76.142783 Ground water 13S7 0.2 mi.W; 41.091236

-76.149647 Ground water 11S6 0.5 mi.SW; 41.085305

-76.152022 Broadleaf Site 1 0.1 mi.ESE; 41.092275

-76.145022 Precipitation Site 2 0.1 mi.SSE; 41.091309

-76.145708 Precipitation Site 3 0.1 mi.WSW; 41.091243

-76.147345 Precipitation Site 4 0.1 mi.NW; 41.093321

-76.147316 Precipitation

- Control Location B-3

TABLE B-1 (contd)

SAMPLING LOCATIONS STATION CODE STATION LOCATION LATITUDINAL LONGITUDINAL SAMPLE TYPE FROM ONE to FIVE MILES FROM THE SSES DEG.

DEG.

IND 0.9 mi.ESE; 41.085141

-76.130174 Fish IND 1.4 mi.ESE; 41.075618

-76.132682 Fish 2B **

1.6 mi.NNE; 41.112441

-76.134758 Sediment 7B 1.2 mi.SE; 41.078924

-76.131548 Sediment 9B1 1.3 mi. SSW; 41.085264

-76.152128 Air 12E1 4.7 mi.WSW; 41.072418

-76.230554 Air 5E2 4.5 mi.E; 41.085184

-76.061099 Milk 13E3 5.0 mi.W; 41.100259

-76.241102 Milk 11D1 3.3 mi.SW; 41.055212

-76.186797 Food Products

- Control Location GREATER THAN FIVE MILES FROM THE SSES 12H2 26 mi.WSW; 40.947192

-76.604524 Drinking water 2H **

30 mi.NNE; 41.459508

-75.853096 Fish 12F 6.9 mi.WSW; 41.041323

-76.255396 Sediment 8G1 **

12 mi.SSE; 40.928886

-76.055092 Air 10G1 **

14 mi.SSW; 40.934847

-76.284449 Milk B-4

TABLE B-1 (contd)

SAMPLING LOCATIONS STATION CODE STATION LOCATION LATITUDINAL LONGITUDINAL SAMPLE TYPE OSLD LOCATIONS LESS THAN ONE MILE FROM THE SSES DEG.

DEG.

1S2 0.2 mi.N; 41.09566

-76.146121 OSLD 2S2 0.9 mi.NNE; 41.10207

-76.141192 OSLD 2S3 0.2 mi.NNE; 41.09486

-76.144101 OSLD 3S2 0.5 mi.NE; 41.09574

-76.140086 OSLD 3S3 0.9 mi.NE; 41.10183

-76.133127 OSLD 4S3 0.2 mi.ENE; 41.09322

-76.141934 OSLD 4S6 0.7 mi.ENE; 41.09687

-76.133807 OSLD 5S4 0.8 mi.E; 41.09286

-76.131604 OSLD 5S7 0.3 mi.E; 41.09199

-76.141165 OSLD 6S4 0.2 mi.ESE; 41.09132

-76.142616 OSLD 6S9 0.2 mi.ESE; 41.09067

-76.142966 OSLD 7S6 0.2 mi.SE; 41.08972

-76.14359 OSLD 7S7 0.4 mi.SE; 41.08745

-76.142033 OSLD 8S2 0.2 mi.SSE; 41.08907

-76.14437 OSLD 9S2 0.2 mi.S; 41.08952

-76.14322 OSLD 10S1 0.4 mi.SSW; 41.08663

-76.150082 OSLD 10S2 0.2 mi.SSW; 41.08894

-76.147881 OSLD 11S7 0.4 mi.SWN; 41.08832

-76.15297 OSLD 12S1 0.4 mi.WSW; 41.0887

-76.154112 OSLD 12S3 0.4 mi.WSW; 41.08968

-76.153192 OSLD 13S2 0.4 mi.W; 41.09198

-76.153166 OSLD 13S5 0.4 mi.W; 41.09179

-76.153167 OSLD 13S6 0.4 mi.W; 41.09177

-76.154073 OSLD 14S5 0.5 mi.WNW; 41.09503

-76.153787 OSLD 15S5 0.4 mi.NW; 41.09576

-76.15103 OSLD 16S1 0.3 mi.NNW; 41.09611

-76.147388 OSLD 16S2 0.3 mi.NNW; 41.09599

-76.148922 OSLD 6A4

0.6 mi.ESE; 41.08791

-76.136795 OSLD B-5

TABLE B-1 (contd)

SAMPLING LOCATIONS STATION CODE STATION LOCATION LATITUDINAL LONGITUDINAL SAMPLE TYPE LESS THAN ONE MILE FROM THE SSES DEG.

DEG.

8A3 0.9 mi.SSE; 41.07982

-76.1139078 OSLD 15A3

0.9 mi.NW; 41.10003

-76.1585 OSLD 16A2

0.8 mi.NNW; 41.1025

-76.151595 OSLD FROM ONE to FIVE MILES FROM THE SSES 12S7 1.1 mi.WSW; 41.08621

-76.165914 OSLD 8B2

1.4 mi.SSE; 41.07483

-76.130724 OSLD 9B1 1.3 mi.S; 41.07356

-76.147874 OSLD 10B3

1.7 mi.SSW; 41.07064

-76.156646 OSLD 1D5 4.0 mi.N; 41.14936

-76.144346 OSLD 8D3 4.0 mi.SSE; 41.03824

-76.121683 OSLD 9D4 3.6 mi.S; 41.04015

-76.144529 OSLD 10D1 3.0 mi.SSW; 41.05446

-76.175026 OSLD 12D2 3.7 mi.WSW; 41.07363

-76.213306 OSLD 14D1 3.6 mi.WNW; 41.10706

-76.211891 OSLD 3E1 4.7 mi NE; 41.13953

-76.082398 OSLD 4E2 4.7 mi.ENE; 41.12157

-76.064115 OSLD 5E2 4.5 mi. E; 41.08539

-76.060486 OSLD 6E1 4.7 mi.ESE; 41.07275

-76.059529 OSLD 7E1 4.2 mi.SE; 41.04891

-76.090309 OSLD 11E1 4.7 mi. SW; 41.05188

-76.218713 OSLD 12E1

4.7 mi.WSW; 41.0725

-76.230331 OSLD 13E4 4.1 mi.W; 41.08962

-76.223726 OSLD

Special Interest Area (other than controls)

B-6

TABLE B-1 (contd)

SAMPLING LOCATIONS STATION CODE STATION LOCATION LATITUDINAL LONGITUDINAL SAMPLE TYPE GREATER THAN FIVE MILES FROM THE SSES DEG.

DEG.

2F1 5.9 mi.NNE; 41.16796

-76.09146 OSLD 15F1 5.4 mi.NW; 41.15595

-76.202506 OSLD 16F1 7.8 mi.NNW; 41.18985

-76.229283 OSLD 3G4 **

17 mi.NE; 41.23431

-76.869061 OSLD 4G1 **

14 mi.ENE; 41.13898

-75.885121 OSLD 7G1 **

14 mi.SE; 40.94636

-76.974184 OSLD 12G1 **

15 mi.WSW; 41.0262

-76.411566 OSLD 12G4 **

10 mi. WSW; 40.03868

-76.327731 OSLD

Special Interest Area (other than controls)

- Control Location B-7

TABLE B-2 SUSQUEHANNA STEAM ELECTRIC STATION RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM Sample Medium Analysis Sampling Method Collection Procedure Number Analytical Procedure Number Ambient Radiation Dosimeter Quarterly SSES, HP-TP-205 Landauer Procedure L313, Inlight Dosimeter Analysis Air Gross Beta Weekly Applied Ecoscience, Appendix 2 TBE-2008 Gross Alpha and/or Gross Beta Activity in Various Matrices.

Air I-131 Weekly Applied Ecoscience, Appendix 2 TBE-2012 Radioiodine in Various Matrices Air Gamma Quarterly Applied Ecoscience, Appendix 2 TBE-2007 Gamma Emitting Radioisotope Analysis Drinking Water Gross Beta Monthly Applied Ecoscience, Appendix 5 TBE-2008 Gross Alpha and/or Gross Beta Activity in Various Matrices.

Surface &

Drinking Water Tritium Monthly Applied Ecoscience, Appendix 3, 4, 5, 6, & 7 TBE-2010 Tritium and Carbon-14 Analysis by Liquid Scintillation.

Surface &

Drinking Water Gamma Monthly Applied Ecoscience, Appendix 3, 4, 5, 6, & 7 TBE-2007 Gamma Emitting Radioisotope Analysis.

Ground Water Tritium Quarterly Applied Ecoscience, Appendix 8 TBE-2010 Tritium and Carbon-14 Analysis by Liquid Scintillation Ground Water Gamma Quarterly Applied Ecoscience, Appendix 8 TBE-2007 Gamma Emitting Radioisotope Analysis B-8

TABLE B-2 (cont'd)

SUSQUEHANNA STEAM ELECTRIC STATION RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM Sample Medium Analysis Sampling Method Collection Procedure Number Analytical Procedure Number Precipitation Tritium Monthly (Apr - Nov) /

Quarterly Applied Ecoscience, Appendix 10 TBE-2010 Tritium and Carbon-14 Analysis by Liquid Scintillation Milk Gamma Monthly/Bi-Weekly Applied Ecoscience, Appendix 9 TBE-2007 Gamma Emitting Radioisotope Analysis Milk I-131 Monthly/Bi-Weekly Applied Ecoscience, Appendix 9 TBE-2012 Radioiodine in Various Matrices Fish Gamma Semi-Annually (Spring/Fall)

Applied Ecoscience, Appendix 11 TBE-2007 Gamma Emitting Radioisotope Analysis Sediment Gamma Semi-Annually (Spring/Fall)

Applied Ecoscience, Appendix 12 TBE-2007 Gamma Emitting Radioisotope Analysis Fruits &

Vegetables Gamma In Season (When available)

Applied Ecoscience, Appendix 13 Applied Ecoscience, Appendix 15 TBE-2007 Gamma Emitting Radioisotope Analysis B-9

MAP 8-1 Direct Radiation Monitoring Locations Within One Mile B-10

MAP 8-2 Direct Radiation Monitoring Locations From One to Five Miles B-11

MAP 8-3 Direct Radiation Monitoring Locations Greater Than Five Miles B-12

MAP B.. 4 Environmental s arr,p lflg Locations Within One /V/i/e

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MAP 8-5 Environmental Sampling Locations From One to Five Miles B-14

MAP 8-6 Environmental Sampling Locations Greater Than Five Miles

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e B-15

APPENDIX C DATA TABLES C-1

TABLE C-1 GROSS BETA ANALYSES OF AIR PARTICULATE FILTERS SUSQUEHANNA STEAM ELECTRIC STATION, 2020 Results in units of E-03 pCi/cu.m. +/- 2 sigma COLLECTION PERIOD 3S2 8G1 12E1 12S1 13S6 9B1 01/02/20 - 01/08/20 12 +/- 2 10 +/- 2 14 +/- 3 15 +/- 3 13 +/- 2 12 +/- 2 01/08/20 - 01/15/20 9 +/- 2 8 +/- 2 9 +/- 2 9 +/- 2 10 +/- 2 9 +/- 2 01/15/20 - 01/22/20 14 +/- 2 15 +/- 2 14 +/- 2 19 +/- 3 18 +/- 2 15 +/- 2 01/22/20 - 01/29/20 9 +/- 2 7 +/- 2 9 +/- 2 9 +/- 2 10 +/- 2 9 +/- 2 01/29/20 - 02/05/20 11 +/- 2 11 +/- 2 12 +/- 2 13 +/- 2 11 +/- 2 10 +/- 2 02/05/20 - 02/12/20 10 +/- 2 7 +/- 2 8 +/- 2 10 +/- 2 11 +/- 2 8 +/- 2 02/12/20 - 02/19/20 11 +/- 2 9 +/- 2 14 +/- 2 14 +/- 2 13 +/- 2 12 +/- 2 02/19/20 - 02/26/20 17 +/- 2 19 +/- 3 16 +/- 2 20 +/- 3 20 +/- 3 18 +/- 2 02/26/20 - 03/04/20 12 +/- 2 12 +/- 2 12 +/- 2 11 +/- 2 12 +/- 2 12 +/- 2 03/04/20 - 03/11/20 12 +/- 2 13 +/- 2 12 +/- 2 12 +/- 2 13 +/- 2 12 +/- 2 03/11/20 - 03/18/20 10 +/- 2 11 +/- 2 12 +/- 2 11 +/- 2 11 +/- 2 9 +/- 2 03/18/20 - 03/25/20 11 +/- 2 11 +/- 6 10 +/- 2 10 +/- 2 14 +/- 2 9 +/- 2 03/25/20 - 04/01/20 6 +/- 2 7 +/- 2 6 +/- 2 7 +/- 2 8 +/- 2 6 +/- 2 04/01/20 - 04/08/20 12 +/- 2 9 +/- 2 11 +/- 2 10 +/- 2 12 +/- 2 9 +/- 2 04/08/20 - 04/15/20 12 +/- 2 12 +/- 2 12 +/- 2 12 +/- 2 10 +/- 2 13 +/- 2 04/15/20 - 04/22/20 13 +/- 5 13 +/- 2 12 +/- 2 11 +/- 2 12 +/- 2 13 +/- 2 04/22/20 - 04/29/20 9 +/- 2 7 +/- 2 9 +/- 2 9 +/- 2 8 +/- 2 7 +/- 2 04/29/20 - 05/06/20 8 +/- 2 8 +/- 2 9 +/- 2 12 +/- 2 11 +/- 2 9 +/- 2 05/06/20 - 05/13/20 10 +/- 2 10 +/- 2 9 +/- 2 10 +/- 2 10 +/- 2 11 +/- 2 05/13/20 - 05/20/20 14 +/- 2 13 +/- 2 16 +/- 2 17 +/- 2 16 +/- 2 15 +/- 2 05/20/20 - 05/27/20 8 +/- 2 7 +/- 2 10 +/- 2 8 +/- 2 8 +/- 2 8 +/- 2 05/27/20 - 06/03/20 11 +/- 2 9 +/- 2 12 +/- 2 12 +/- 2 11 +/- 2 10 +/- 2 06/03/20 - 06/10/20 12 +/- 2 10 +/- 2 13 +/- 2 13 +/- 2 13 +/- 2 13 +/- 2 06/10/20 - 06/17/20 8 +/- 2 7 +/- 2 9 +/- 2 8 +/- 2 8 +/- 2 6 +/- 2 06/17/20 - 06/24/20 8 +/- 2 7 +/- 2 6 +/- 2 8 +/- 2 7 +/- 2 8 +/- 2 06/24/20 - 07/01/20 13 +/- 2 12 +/- 2 13 +/- 2 14 +/- 2 13 +/- 2 11 +/- 2 07/01/20 - 07/08/20 16 +/- 2 14 +/- 2 17 +/- 2 16 +/- 2 16 +/- 2 16 +/- 2 07/08/20 - 07/15/20 11 +/- 2 8 +/- 2 10 +/- 2 12 +/- 2 12 +/- 2 9 +/- 2 07/15/20 - 07/22/20 19 +/- 3 19 +/- 3 17 +/- 2 16 +/- 2 18 +/- 3 16 +/- 2 07/22/20 - 07/29/20 18 +/- 3 17 +/- 3 18 +/- 2 16 +/- 3 17 +/- 3 18 +/- 2 07/29/20 - 08/05/20 15 +/- 2 13 +/- 2 13 +/- 2 13 +/- 2 18 +/- 3 16 +/- 2 08/05/20 - 08/12/20 22 +/- 3 21 +/- 3 24 +/- 3 20 +/- 3 21 +/- 3 21 +/- 3 08/12/20 - 08/19/20 17 +/- 2 17 +/- 3 17 +/- 2 19 +/- 3 19 +/- 3 17 +/- 2 08/19/20 - 08/26/20 15 +/- 2 19 +/- 3 18 +/- 2 19 +/- 3 17 +/- 2 17 +/- 2 08/26/20 - 09/02/20 11 +/- 2 12 +/- 2 13 +/- 2 11 +/- 2 10 +/- 2 12 +/- 2 09/02/20 - 09/09/20 17 +/- 2 16 +/- 2 17 +/- 2 16 +/- 2 19 +/- 3 14 +/- 2 09/09/20 - 09/16/20 9 +/- 2 8 +/- 2 10 +/- 2 11 +/- 2 10 +/- 2 10 +/- 2 09/16/20 - 09/23/20 13 +/- 2 14 +/- 2 14 +/- 2 15 +/- 2 15 +/- 2 13 +/- 2 09/23/20 - 09/30/20 25 +/- 3 24 +/- 3 26 +/- 3 30 +/- 3 27 +/- 3 29 +/- 3 09/30/20 - 10/07/20 11 +/- 2 12 +/- 2 15 +/- 2 10 +/- 2 12 +/- 2 11 +/- 2 10/07/20 - 10/14/20 15 +/- 2 14 +/- 2 14 +/- 2 15 +/- 2 14 +/- 2 15 +/- 2 10/14/20 - 10/21/20 18 +/- 2 15 +/- 2 17 +/- 2 17 +/- 2 17 +/- 3 17 +/- 2 10/21/20 - 10/28/20 12 +/- 2 8 +/- 2 11 +/- 2 12 +/- 2 11 +/- 2 11 +/- 2 10/28/20 - 11/04/20 13 +/- 2 13 +/- 2 12 +/- 2 14 +/- 2 13 +/- 2 12 +/- 2 11/04/20 - 11/11/20 22 +/- 3 17 +/- 2 22 +/- 3 22 +/- 3 22 +/- 3 24 +/- 3 11/11/20 - 11/18/20 14 +/- 2 14 +/- 2 14 +/- 2 12 +/- 2 15 +/- 2 15 +/- 2 11/18/20 - 11/24/20 14 +/- 2 12 +/- 2 12 +/- 2 12 +/- 2 13 +/- 2 13 +/- 2 11/24/20 - 12/02/20 9 +/- 2 8 +/- 2 8 +/- 2 9 +/- 2 9 +/- 2 9 +/- 2 12/02/20 - 12/09/20 10 +/- 2 9 +/- 2 10 +/- 2 9 +/- 2 9 +/- 2 11 +/- 2 12/09/20 - 12/15/20 21 +/- 3 20 +/- 3 27 +/- 3 22 +/- 3 22 +/- 3 25 +/- 3 12/15/20 - 12/22/20 8 +/- 2 6 +/- 2 12 +/- 2 10 +/- 2 11 +/- 2 13 +/- 2 12/22/20 - 12/30/20 13 +/- 2 11 +/- 2 12 +/- 2 11 +/- 2 12 +/- 2 13 +/- 2 13 +/- 8 12 +/- 8 13 +/- 9 13 +/- 9 13 +/- 9 13 +/- 9 AVERAGE C-2

TABLE C-1 GROSS BETA ANALYSES OF AIR PARTICULATE FILTERS SUSQUEHANNA STEAM ELECTRIC STATION, 2020 Results in units of E-03 pCi/cu.m. +/- 2 sigma COLLECTION PERIOD 10S3 01/02/20 - 01/08/20 13 +/- 2 01/08/20 - 01/15/20 8 +/- 2 01/15/20 - 01/22/20 15 +/- 2 01/22/20 - 01/29/20 9 +/- 2 01/29/20 - 02/05/20 11 +/- 2 02/05/20 - 02/12/20 8 +/- 2 02/12/20 - 02/19/20 14 +/- 2 02/19/20 - 02/26/20 19 +/- 2 02/26/20 - 03/04/20 14 +/- 2 03/04/20 - 03/11/20 11 +/- 2 03/11/20 - 03/18/20 13 +/- 2 03/18/20 - 03/25/20 9 +/- 2 03/25/20 - 04/01/20 8 +/- 2 04/01/20 - 04/08/20 11 +/- 2 04/08/20 - 04/15/20 11 +/- 2 04/15/20 - 04/22/20 13 +/- 2 04/22/20 - 04/29/20 8 +/- 2 04/29/20 - 05/06/20 10 +/- 2 05/06/20 - 05/13/20 9 +/- 2 05/13/20 - 05/20/20 13 +/- 2 05/20/20 - 05/27/20 8 +/- 2 05/27/20 - 06/03/20 11 +/- 2 06/03/20 - 06/10/20 12 +/- 2 06/10/20 - 06/17/20 7 +/- 2 06/17/20 - 06/24/20 7 +/- 2 06/24/20 - 07/01/20 14 +/- 2 07/01/20 - 07/08/20 18 +/- 2 07/08/20 - 07/15/20 10 +/- 2 07/15/20 - 07/22/20 15 +/- 2 07/22/20 - 07/29/20 17 +/- 4 07/29/20 - 08/05/20 19 +/- 3 08/05/20 - 08/12/20 20 +/- 3 08/12/20 - 08/19/20 17 +/- 2 08/19/20 - 08/26/20 16 +/- 2 08/26/20 - 09/02/20 12 +/- 2 09/02/20 - 09/09/20 15 +/- 2 09/09/20 - 09/16/20 11 +/- 2 09/16/20 - 09/23/20 14 +/- 2 09/23/20 - 09/30/20 28 +/- 3 09/30/20 - 10/07/20 9 +/- 2 10/07/20 - 10/14/20 15 +/- 2 10/14/20 - 10/21/20 16 +/- 2 10/21/20 - 10/28/20 11 +/- 2 10/28/20 - 11/04/20 12 +/- 2 11/04/20 - 11/11/20 23 +/- 3 11/11/20 - 11/18/20 13 +/- 2 11/18/20 - 11/24/20 10 +/- 2 11/24/20 - 12/02/20 9 +/- 2 12/02/20 - 12/09/20 10 +/- 2 12/09/20 - 12/15/20 24 +/- 3 12/15/20 - 12/22/20 11 +/- 2 12/22/20 - 12/30/20 11 +/- 2 13 +/- 9 AVERAGE C-3

TABLE C-2 GAMMA SPECTROSCOPIC ANALYSES OF COMPOSITED AIR PARTICULATE FILTERS SUSQUEHANNA STEAM ELECTRIC STATION, 2020 Results in units of E-03 pCi/cu.m. +/- 2 sigma COLLECTION SITE PERIOD Be-7 K-40 Cs-134 Cs-137 8G1 01/02/20 - 04/01/20 103 +/- 24

< 30

< 2

< 2 04/01/20 - 07/01/20 129 +/- 21

< 20

< 1

< 1 07/01/20 - 09/30/20 117 +/- 24

< 27

< 1

< 1 09/30/20 - 12/30/20 97 +/- 17

< 21

< 1

< 1 AVERAGE 111 +/- 29 3S2 01/02/20 - 04/01/20 83 +/- 16

< 16

< 1

< 1 04/01/20 - 07/01/20 119 +/- 23

< 20

< 1

< 1 07/01/20 - 09/30/20 117 +/- 25

< 25

< 2

< 1 09/30/20 - 12/30/20 91 +/- 17

< 16

< 1

< 1 AVERAGE 103 +/- 36 12E1 01/02/20 - 04/01/20 91 +/- 16

< 13

< 1

< 1 04/01/20 - 07/01/20 139 +/- 23

< 24

< 2

< 1 07/01/20 - 09/30/20 140 +/- 25

< 27

< 2

< 2 09/30/20 - 12/30/20 102 +/- 17

< 17

< 1

< 1 AVERAGE 118 +/- 51 12S1 01/02/20 - 04/01/20 68 +/- 25

< 24

< 2

< 2 04/01/20 - 07/01/20 130 +/- 20

< 15

< 1

< 1 07/01/20 - 09/30/20 149 +/- 23

< 18

< 1

< 1 09/30/20 - 12/30/20 94 +/- 18

< 22

< 1

< 1 AVERAGE 110 +/- 72 13S6 01/02/20 - 04/01/20 107 +/- 20

< 17

< 1

< 1 04/01/20 - 07/01/20 132 +/- 18

< 16

< 1

< 1 07/01/20 - 09/30/20 128 +/- 19

< 14

< 1

< 1 09/30/20 - 12/30/20 87 +/- 18

< 16

< 1

< 1 AVERAGE 114 +/- 41 9B1 01/02/20 - 04/01/20 104 +/- 20

< 23

< 1

< 1 04/01/20 - 07/01/20 135 +/- 22

< 25

< 1

< 1 07/01/20 - 09/30/20 136 +/- 21

< 17

< 1

< 1 09/30/20 - 12/30/20 126 +/- 21

< 21

< 2

< 1 AVERAGE 125 +/- 30 10S3 01/02/20 - 04/01/20 93 +/- 20

< 11

< 1

< 1 04/01/20 - 07/01/20 120 +/- 21

< 12

< 1

< 1 07/01/20 - 09/30/20 126 +/- 25

< 18

< 1

< 1 09/30/20 - 12/30/20 80 +/- 18

< 17

< 1

< 1 AVERAGE 105 +/- 44 C-4

TABLE C-3 IODINE-131 ANALYSES OF AIR IODINE SAMPLES SUSQUEHANNA STEAM ELECTRIC STATION, 2020 Results in units of E-03 pCi/cu.m. +/- 2 sigma COLLECTION PERIOD 3S2 8G1 12E1 12S1 13S6 9B1 01/02/20 - 01/08/20

< 9

< 8

< 9

< 8

< 7 01/08/20 - 01/15/20

< 10

< 4 01/15/20 - 01/22/20

< 13

< 8

< 11

< 13

< 8 01/22/20 - 01/29/20

< 17

< 15

< 17

< 11 01/29/20 - 02/05/20

< 8

< 15

< 16

< 15

< 19

< 12 02/05/20 - 02/12/20

< 8

< 13

< 19

< 10 02/12/20 - 02/19/20

< 5

< 7

< 2

< 3 02/19/20 - 02/26/20

< 15

< 18

< 17

< 16

< 18

< 13 02/26/20 - 03/04/20

< 3

< 9

< 7

< 7 03/04/20 - 03/11/20

< 4

< 6

< 7

< 8

< 7 03/11/20 - 03/18/20

< 3

< 5

< 6

< 7

< 6 03/18/20 - 03/25/20

< 14

< 8

< 15

< 7 03/25/20 - 04/01/20

< 3

< 8

< 9

< 4

< 6

< 9 04/01/20 - 04/08/20

< 12

< 8

< 14

< 3 04/08/20 - 04/15/20

< 8

< 17

< 11

< 16

< 15

< 17 04/15/20 - 04/22/20

< 10

< 18

< 17

< 12 04/22/20 - 04/29/20

< 12

< 14

< 13

< 19

< 6 04/29/20 - 05/06/20

< 8

< 17

< 16

< 13

< 9 05/06/20 - 05/13/20

< 16

< 10

< 17

< 15

< 18 05/13/20 - 05/20/20

< 8

< 11

< 12

< 11

< 7

< 5 05/20/20 - 05/27/20

< 10

< 16

< 9

< 16

< 17 05/27/20 - 06/03/20

< 11

< 8

< 5

< 5 06/03/20 - 06/10/20

< 14

< 12

< 13

< 14

< 7 06/10/20 - 06/17/20

< 10

< 12

< 10

< 11

< 5 06/17/20 - 06/24/20

< 8

< 14

< 13

< 14

< 7 06/24/20 - 07/01/20

< 10

< 6

< 10

< 6

< 10

< 14 07/01/20 - 07/08/20

< 9

< 8

< 9

< 4 07/08/20 - 07/15/20

< 10

< 15

< 14

< 16

< 10

< 8 07/15/20 - 07/22/20

< 12

< 9

< 11

< 5

< 12

< 19 07/22/20 - 07/29/20

< 15

< 8

< 17

< 19

< 6

< 18 07/29/20 - 08/05/20

< 11

< 6

< 10

< 11

< 6 08/05/20 - 08/12/20

< 14

< 10

< 9

< 10 08/12/20 - 08/19/20

< 11

< 4

< 11

< 12

< 5 08/19/20 - 08/26/20

< 6

< 7

< 13

< 14

< 15 08/26/20 - 09/02/20

< 10

< 7

< 4

< 11

< 10

< 16 09/02/20 - 09/09/20

< 11

< 5

< 11

< 5

< 11

< 12 09/09/20 - 09/16/20

< 14

< 11

< 10

< 11

< 6

< 10 09/16/20 - 09/23/20

< 13

< 7

< 12

< 6

< 12

< 15 09/23/20 - 09/30/20

< 10

< 5

< 9

< 5

< 10

< 11 09/30/20 - 10/07/20

< 9

< 5

< 12

< 20

< 12 10/07/20 - 10/14/20

< 19

< 13

< 19

< 10

< 18 10/14/20 - 10/21/20

< 19

< 13

< 19

< 10

< 18 10/21/20 - 10/28/20

< 20

< 17

< 12

< 9

< 16 10/28/20 - 11/04/20

< 8

< 5

< 8

< 4

< 9

< 10 11/04/20 - 11/11/20

< 17

< 15

< 8

< 7 11/11/20 - 11/18/20

< 13

< 14

< 13

< 6

< 6 11/18/20 - 11/24/20

< 20

< 12

< 14

< 5 11/24/20 - 12/02/20

< 11

< 9

< 16

< 4 12/02/20 - 12/09/20

< 19

< 9

< 10

< 8

< 4 12/09/20 - 12/15/20

< 12

< 6

< 5

< 12

< 7 12/15/20 - 12/22/20

< 5

< 18

< 10

< 11

< 10

< 19 12/22/20 - 12/30/20

< 12

< 17

< 18

< 5

< 12 AVERAGE C-5

TABLE C-3 IODINE-131 ANALYSES OF AIR IODINE SAMPLES SUSQUEHANNA STEAM ELECTRIC STATION, 2020 Results in units of E-03 pCi/cu.m. +/- 2 sigma COLLECTION PERIOD 10S3 01/02/20 - 01/08/20

< 8 01/08/20 - 01/15/20

< 10 01/15/20 - 01/22/20

< 13 01/22/20 - 01/29/20

< 15 01/29/20 - 02/05/20

< 15 02/05/20 - 02/12/20

< 13 02/12/20 - 02/19/20

< 7 02/19/20 - 02/26/20

< 17 02/26/20 - 03/04/20

< 9 03/04/20 - 03/11/20

< 7 03/11/20 - 03/18/20

< 6 03/18/20 - 03/25/20

< 8 03/25/20 - 04/01/20

< 8 04/01/20 - 04/08/20

< 8 04/08/20 - 04/15/20

< 16 04/15/20 - 04/22/20

< 18 04/22/20 - 04/29/20

< 13 04/29/20 - 05/06/20

< 16 05/06/20 - 05/13/20

< 17 05/13/20 - 05/20/20

< 11 05/20/20 - 05/27/20

< 16 05/27/20 - 06/03/20

< 8 06/03/20 - 06/10/20

< 10 06/10/20 - 06/17/20

< 5 06/17/20 - 06/24/20

< 14 06/24/20 - 07/01/20

< 10 07/01/20 - 07/08/20

< 8 07/08/20 - 07/15/20

< 16 07/15/20 - 07/22/20

< 12 07/22/20 - 07/29/20

< 16 07/29/20 - 08/05/20

< 9 08/05/20 - 08/12/20

< 5 08/12/20 - 08/19/20

< 5 08/19/20 - 08/26/20

< 15 08/26/20 - 09/02/20

< 11 09/02/20 - 09/09/20

< 12 09/09/20 - 09/16/20

< 5 09/16/20 - 09/23/20

< 13 09/23/20 - 09/30/20

< 11 09/30/20 - 10/07/20

< 12 10/07/20 - 10/14/20

< 20 10/14/20 - 10/21/20

< 19 10/21/20 - 10/28/20

< 17 10/28/20 - 11/04/20

< 9 11/04/20 - 11/11/20

< 16 11/11/20 - 11/18/20

< 13 11/18/20 - 11/24/20

< 12 11/24/20 - 12/02/20

< 9 12/02/20 - 12/09/20

< 9 12/09/20 - 12/15/20

< 6 12/15/20 - 12/22/20

< 10 12/22/20 - 12/30/20

< 17 AVERAGE C-6

TABLE C-4 ENVIRONMENTAL OPTICALLY STIMULATED LUMINESCENCE DOSIMETRY RESULTS SUSQUEHANNA STEAM ELECTRIC STATION, 2020 Results (1) are in mR/std. qtr (2) +/- 2 sigma (3)

First Quarter Second Quarter Third Quarter Fourth Quarter 1/16/2020 to 4/5/2020 4/5/2020 to 7/10/2020 7/10/2020 to 10/7/2020 10/7/2020 to 1/7/2021 LOCATION ONSITE 1S2 18.5 +/- 0.4 20.1 +/- 1.1 23.3 +/- 0.5 22.5 +/- 1.9 2S2 14.3 +/- 0.2 14.6 +/- 0.6 16.2 +/- 0.2 15.8 +/- 1.0 2S3 17.5 +/- 0.8 18.7 +/- 0.9 18.8 +/- 5.0 15.5 +/- 6.8 3S2 14.3 +/- 0.1 14.4 +/- 0.3 15.1 +/- 0.2 13.9 +/- 1.5 3S3 11.7 +/- 0.8 13.5 +/- 0.7 13.5 +/- 2.9 13.3 +/- 0.4 4S3 18.4 +/- 0.9 20.6 +/- 0.4 20.1 +/- 0.9 20.0 +/- 0.4 4S6 13.3 +/- 0.6 13.9 +/- 0.3 15.4 +/- 0.2 13.5 +/- 0.0 5S4 11.7 +/- 0.0 12.3 +/- 0.0 14.6 +/- 0.8 12.8 +/- 0.4 5S7 15.2 +/- 1.5 16.3 +/- 2.1 19.5 +/- 2.1 16.6 +/- 1.2 6S4 23.0 +/- 0.2 22.2 +/- 1.9 25.9 +/- 3.8 24.0 +/- 0.6 6S9 20.6 +/- 0.4 20.9 +/- 0.1 27.6 +/- 0.1 23.7 +/- 2.7 7S6 19.8 +/- 2.9 21.3 +/- 0.1 23.9 +/- 1.0 20.3 +/- 0.5 7S7 12.9 +/- 0.7 14.4 +/- 0.3 13.2 +/- 1.3 14.9 +/- 2.0 8S2 20.8 +/- 0.4 22.4 +/- 0.4 27.0 +/- 1.1 23.4 +/- 1.0 9S2 37.8 +/- 3.6 39.6 +/- 1.7 46.3 +/- 0.4 36.3 +/- 2.0 10S1 12.7 +/- 0.2 12.4 +/- 0.3 16.0 +/- 0.4 15.2 +/- 0.2 10S2 30.2 +/- 0.9 31.6 +/- 0.5 29.7 +/- 2.3 26.9 +/- 0.4 11S7 12.9 +/- 0.1 14.5 +/- 0.6 16.3 +/- 1.5 15.5 +/- 0.8 12S1 15.1 +/- 1.2 16.0 +/- 1.8 16.5 +/- 0.1 15.0 +/- 2.0 12S3 18.4 +/- 2.5 20.8 +/- 1.1 20.9 +/- 1.0 20.4 +/- 1.1 12S7 13.9 +/- 1.0 15.3 +/- 2.1 14.7 +/- 0.3 14.4 +/- 0.1 13S2 26.3 +/- 1.4 27.6 +/- 0.7 24.1 +/- 0.6 24.0 +/- 1.1 13S5 27.3 +/- 1.0 25.8 +/- 1.1 (4)

(4) 21.1 +/- 0.3 13S6 19.2 +/- 1.5 19.9 +/- 0.5 21.4 +/- 0.5 20.3 +/- 0.7 14S5 15.9 +/- 1.4 18.5 +/- 0.9 17.5 +/- 2.8 17.9 +/- 1.2 15S5 16.4 +/- 1.0 16.3 +/- 1.6 18.9 +/- 1.7 16.1 +/- 0.3 16S1 18.8 +/- 0.6 21.1 +/- 1.1 26.5 +/- 0.8 24.8 +/- 0.3 16S2 18.2 +/- 0.9 19.2 +/- 0.1 22.3 +/- 2.3 21.1 +/- 0.6 See the comments at the end of this table.

C-7

TABLE C-4 ENVIRONMENTAL OPTICALLY STIMULATED LUMINESCENCE DOSIMETRY RESULTS SUSQUEHANNA STEAM ELECTRIC STATION, 2020 Results (1) are in mR/std. qtr (2) +/- 2 sigma (3)

First Quarter Second Quarter Third Quarter Fourth Quarter 1/16/2020 to 4/5/2020 4/5/2020 to 7/10/2020 7/10/2020 to 10/7/2020 10/7/2020 to 1/7/2021 LOCATION 0-1 MILE OFFSITE 6A4 15.5 +/- 1.7 17.0 +/- 0.3 17.7 +/- 0.3 17.1 +/- 0.4 8A3 16.3 +/- 0.2 15.4 +/- 1.2 17.8 +/- 0.1 15.9 +/- 0.8 15A3 12.6 +/- 0.6 12.2 +/- 0.9 15.0 +/- 1.1 13.4 +/- 0.4 16A2 12.3 +/- 0.4 13.6 +/- 1.3 14.8 +/- 0.8 14.7 +/- 0.2 1-2 MILES OFFSITE 8B2 12.8 +/- 0.6 14.5 +/- 0.8 14.9 +/- 0.7 15.7 +/- 0.3 9B1 17.6 +/- 0.2 19.0 +/- 0.3 20.5 +/- 0.1 17.1 +/- 1.1 10B3 13.4 +/- 0.1 14.9 +/- 0.9 13.1 +/- 0.3 14.4 +/- 0.8 3-4 MILES OFFSITE 1D5 13.6 +/- 0.0 17.8 +/- 0.7 16.4 +/- 0.8 16.5 +/- 0.1 8D3 14.4 +/- 0.9 15.1 +/- 2.6 16.2 +/- 0.8 15.7 +/- 0.2 9D4 14.7 +/- 0.0 17.9 +/- 1.1 17.0 +/- 0.6 17.5 +/- 1.4 10D1 12.9 +/- 0.5 14.4 +/- 1.5 15.6 +/- 1.1 13.7 +/- 1.1 12D2 17.8 +/- 1.0 19.6 +/- 1.3 19.0 +/- 1.1 19.9 +/- 1.3 14D1 14.7 +/- 0.6 15.4 +/- 1.1 16.1 +/- 0.4 14.8 +/- 0.1 4-5 MILES OFFSITE 3E1 12.2 +/- 0.8 12.6 +/- 0.7 12.8 +/- 0.5 12.9 +/- 0.4 4E2 14.3 +/- 0.5 19.1 +/- 3.2 16.6 +/- 1.1 16.9 +/- 0.1 5E2 14.0 +/- 0.0 16.4 +/- 0.7 16.9 +/- 0.5 15.6 +/- 1.6 6E1 15.5 +/- 1.9 17.0 +/- 3.4 17.1 +/- 1.3 14.6 +/- 0.4 7E1 14.1 +/- 1.7 15.5 +/- 1.9 15.9 +/- 0.8 14.7 +/- 0.6 11E1 10.1 +/- 0.4 13.4 +/- 1.8 11.6 +/- 0.5 12.2 +/- 0.8 12E1 11.4 +/- 1.5 14.2 +/- 0.7 13.3 +/- 0.6 13.1 +/- 1.1 13E4 16.0 +/- 0.5 15.6 +/- 3.0 17.7 +/- 0.1 17.6 +/- 0.4 See the comments at the end of this table.

C-8

TABLE C-4 ENVIRONMENTAL OPTICALLY STIMULATED LUMINESCENCE DOSIMETRY RESULTS SUSQUEHANNA STEAM ELECTRIC STATION, 2020 Results (1) are in mR/std. qtr (2) +/- 2 sigma (3)

First Quarter Second Quarter Third Quarter Fourth Quarter 1/16/2020 to 4/5/2020 4/5/2020 to 7/10/2020 7/10/2020 to 10/7/2020 10/7/2020 to 1/7/2021 LOCATION 5-10 MILES OFFSITE 2F1 13.3 +/- 0.1 15.7 +/- 2.3 16.3 +/- 1.1 15.8 +/- 0.5 15F1 17.1 +/- 1.3 17.5 +/- 2.3 17.8 +/- 1.1 17.3 +/- 0.3 16F1 17.3 +/- 2.2 17.8 +/- 0.4 16.4 +/- 0.8 18.0 +/- 0.3 10-20 MILES OFFSITE 3G4 16.1 +/- 0.4 16.9 +/- 0.3 17.0 +/- 0.0 18.8 +/- 1.8 4G1 14.4 +/- 0.6 18.6 +/- 0.6 15.8 +/- 2.2 15.9 +/- 0.4 7G1 14.0 +/- 0.3 16.2 +/- 1.3 15.7 +/- 0.4 16.3 +/- 2.3 12G1 13.3 +/- 2.1 13.2 +/- 1.3 13.5 +/- 0.3 14.1 +/- 1.1 12G4 13.8 +/- 2.1 16.1 +/- 0.6 15.5 +/- 0.6 16.4 +/- 0.5 See the comments at the end of this table.

LOCATION INDICATOR Average (5) 16.5 +/- 10.1 17.8 +/- 9.9 18.7 +/- 11.5 17.6 +/- 8.9 CONTROL Average (5) 14.3 +/- 2.1 16.2 +/- 3.9 15.5 +/- 2.5 16.3 +/- 3.4 COMMENTS (1) Individual monitor location results are normally the average of the elemental doses of four elements from the two dosimeters assigned to each monitoring location.

(2) A standard (std.) quarter (qtr.) is considered to be 91.25 days. Results obtained for monitoring periods of other durations are normalized by multiplying them by 91.25/x, where x is the actual duration in days of the period.

(3) Uncertainties for individual monitoring location results are two standard deviations of the elemental doses of four elements from the two dosimeters assigned to each monitoring location, representing the variability between the elemental doses of each of the four dosimeter elements.

(4) No measurement could be made at this location because the dosimeters were lost, stolen, or damaged. Refer to Appendix A of the Annual Radiological Environmental Operating Report for an explanation of program exceptions to REMP.

(5) Uncertainties associated with quarterly indicator and control averages are two standard deviations, representing the variability between the results of the individual monitoring locations.

C-9

TABLE C-5 IODINE-131 AND GAMMA SPECTROSCOPIC ANALYSES OF MILK SUSQUEHANNA STEAM ELECTRIC STATION, 2020 Results in pCi/Liter +/- 2 sigma COLLECTION SITE DATE I-131 K-40 Cs-134 Cs-137 Ba-140 La-140 Th-228 10G1 01/06/20

< 0.4 1303 +/- 169

< 7

< 24

< 10

< 11 02/03/20

< 0.8 1301 +/- 173

< 8

< 32

< 9

< 15 03/02/20

< 0.8 1298 +/- 159

< 6

< 7

< 30

< 7

< 13 04/06/20

< 0.6 1166 +/- 182

< 6

< 23

< 5

< 13 04/20/20

< 0.8 1203 +/- 191

< 6

< 7

< 26

< 8

< 14 05/04/20

< 0.7 1298 +/- 162

< 6

< 8

< 25

< 7

< 15 05/18/20

< 0.9 1127 +/- 209

< 8

< 7

< 31

< 6

< 16 06/01/20

< 0.7 1365 +/- 157

< 9

< 10

< 33

< 11

< 15 06/15/20

< 0.8 1283 +/- 166

< 7

< 6

< 28

< 5

< 13 06/29/20

< 0.7 1303 +/- 176

< 6

< 9

< 30

< 13

< 14 07/13/20

< 0.8 1383 +/- 186

< 7

< 8

< 29

< 8

< 12 07/27/20

< 0.6 1293 +/- 148

< 6

< 7

< 22

< 6

< 12 08/10/20

< 0.6 1387 +/- 200

< 8

< 11

< 35

< 13

< 18 08/24/20

< 0.7 1162 +/- 182

< 7

< 8

< 30

< 11

< 15 09/08/20

< 0.9 1337 +/- 224

< 7

< 28

< 8

< 13 09/21/20

< 0.8 1274 +/- 174

< 7

< 8

< 30

< 11

< 13 10/05/20

< 0.8 1218 +/- 177

< 8

< 7

< 33

< 9

< 16 10/19/20

< 0.8 1419 +/- 195

< 7

< 9

< 30

< 10

< 15 11/02/20

< 0.8 1312 +/- 192

< 6

< 8

< 30

< 7

< 16 12/07/20

< 0.8 1509 +/- 166

< 7

< 9

< 32

< 8

< 15 AVERAGE 1297 +/- 185 13E3 01/06/20

< 0.4 1307 +/- 178

< 7

< 10

< 33

< 12

< 15 02/03/20

< 0.7 1328 +/- 212

< 7

< 9

< 38

< 12

< 13 03/03/20

< 0.7 1408 +/- 200

< 7

< 23

< 12

< 12 04/06/20

< 0.7 1312 +/- 131

< 4

< 6

< 18

< 6

< 8 04/20/20

< 0.7 1383 +/- 174

< 7

< 8

< 27

< 8

< 13 05/04/20

< 0.5 1312 +/- 153

< 6

< 7

< 26

< 10

< 10 05/18/20

< 0.7 1324 +/- 185

< 8

< 9

< 31

< 11

< 14 06/01/20

< 0.9 1264 +/- 194

< 8

< 10

< 29

< 11

< 16 06/15/20

< 0.7 1281 +/- 178

< 6

< 8

< 30

< 9

< 14 06/29/20

< 0.8 1346 +/- 196

< 7

< 10

< 33

< 11

< 15 07/13/20

< 0.7 1308 +/- 201

< 7

< 29

< 10

< 13 07/27/20

< 0.7 1107 +/- 170

< 7

< 26

< 8

< 11 08/10/20

< 0.8 1298 +/- 162

< 6

< 8

< 23

< 5

< 14 08/24/20

< 0.9 1360 +/- 168

< 6

< 8

< 30

< 7

< 14 09/08/20

< 0.7 1333 +/- 166

< 6

< 7

< 28

< 9

< 12 09/21/20

< 0.6 1241 +/- 206

< 7

< 9

< 33

< 13

< 13 10/05/20

< 0.9 1305 +/- 180

< 7

< 9

< 26

< 10

< 14 10/19/20

< 0.7 1181 +/- 171

< 9

< 8

< 28

< 9

< 14 11/02/20

< 0.7 1412 +/- 165

< 6

< 8

< 29

< 8

< 13 12/07/20

< 0.7 1272 +/- 174

< 7

< 8

< 33

< 12

< 14 AVERAGE 1304 +/- 143

<----------GAMMA EMITTERS---------->

C-10

TABLE C-5 IODINE-131 AND GAMMA SPECTROSCOPIC ANALYSES OF MILK SUSQUEHANNA STEAM ELECTRIC STATION, 2020 Results in pCi/Liter +/- 2 sigma COLLECTION SITE DATE I-131 K-40 Cs-134 Cs-137 Ba-140 La-140 Th-228

<----------GAMMA EMITTERS---------->

5E2 01/06/20

< 0.6 1261 +/- 180

< 7

< 8

< 25

< 8

< 13 02/03/20

< 0.8 1250 +/- 191

< 9

< 11

< 38

< 12

< 15 03/02/20

< 0.7 1131 +/- 178

< 7

< 9

< 35

< 9

< 17 04/06/20

< 0.7 1198 +/- 158

< 7

< 6

< 26

< 5

< 14 04/20/20

< 0.7 1186 +/- 192

< 7

< 9

< 30

< 9

< 17 05/04/20

< 0.6 1312 +/- 186

< 6

< 7

< 30

< 9

< 14 05/18/20

< 0.7 1142 +/- 183

< 8

< 7

< 38

< 11

< 16 06/01/20

< 0.6 1161 +/- 186

< 7

< 10

< 31

< 8

< 17 06/15/20

< 0.7 1197 +/- 171

< 5

< 6

< 23

< 9

< 13 06/29/20

< 0.8 1064 +/- 173

< 8

< 10

< 31

< 8

< 16 07/13/20

< 0.8 1269 +/- 160

< 7

< 25

< 8

< 13 07/27/20

< 0.6 1174 +/- 171

< 5

< 9

< 22

< 7

< 13 08/10/20

< 0.7 1168 +/- 197

< 7

< 8

< 34

< 6

< 16 08/24/20

< 0.7 1195 +/- 195

< 7

< 8

< 31

< 11

< 15 09/08/20

< 0.6 1376 +/- 191

< 9

< 10

< 31

< 10

< 14 09/21/20

< 0.7 1180 +/- 222

< 6

< 11

< 29

< 10

< 11 10/05/20

< 0.8 1072 +/- 161

< 7

< 8

< 29

< 7

< 15 10/19/20

< 0.7 1121 +/- 173

< 7

< 9

< 30

< 10

< 16 11/02/20

< 0.7 1198 +/- 163

< 6

< 7

< 28

< 5

< 12 12/07/20

< 0.9 1195 +/- 143

< 7

< 24

< 8

< 11 AVERAGE 1193 +/- 150 C-11

TABLE C-6 TRITIUM AND GAMMA SPECTROSCOPIC ANALYSES OF GROUNDWATER Results in pCi/Liter +/- 2 sigma COLLECTION SITE DATE H-3 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 I-131 Cs-134 Cs-137 Ba-140 La-140 Th-228 2S8 01/15/20

< 145

< 124

< 8

< 21

< 6

< 11

< 8

< 13

< 7

< 31

< 10

< 14 04/25/20

< 136

< 72

< 4

< 12

< 4

< 7

< 4

< 7

< 8

< 4

< 20

< 8

< 7 07/23/20

< 125

< 83

< 5

< 15

< 7

< 8

< 4

< 9

< 11

< 4

< 6

< 28

< 9

< 9 11/05/20

< 148

< 77

< 7

< 8

< 19

< 6

< 17

< 9

< 13

< 7

< 41

< 7

< 14 AVERAGE 13S7 01/14/20 296 +/- 99

< 110

< 7

< 18

< 6

< 13

< 7

< 11

< 5

< 7

< 33

< 13

< 11 04/28/20 188 +/- 91

< 130

< 5

< 4

< 19

< 5

< 14

< 6

< 12

< 9

< 6

< 7

< 22

< 11

< 11 07/28/20

< 130

< 129

< 7

< 19

< 11

< 7

< 14

< 10

< 7

< 8

< 31

< 5

< 12 11/03/20

< 144

< 95

< 6

< 5

< 16

< 8

< 7

< 6

< 11

< 5

< 32

< 11

< 11 AVERAGE 242 +/- 153 1S3 01/14/20 248 +/- 100

< 107

< 7

< 5

< 17

< 6

< 15

< 8

< 10

< 13

< 5

< 7

< 31

< 13

< 11 04/28/20 281 +/- 101

< 68

< 6

< 7

< 19

< 8

< 15

< 7

< 12

< 7

< 9

< 32

< 14

< 15 07/28/20 168 +/- 83

< 129

< 5

< 6

< 16

< 11

< 13

< 7

< 9

< 12

< 6

< 31

< 12

< 13 11/03/20

< 147

< 114

< 6

< 8

< 19

< 9

< 12

< 7

< 11

< 13

< 6

< 7

< 35

< 8

< 11 AVERAGE 232 +/- 116 4S8 01/14/20 245 +/- 98

< 113

< 4

< 5

< 19

< 6

< 14

< 8

< 11

< 6

< 5

< 31

< 11

< 12 04/28/20 274 +/- 98

< 125

< 7

< 9

< 24

< 8

< 16

< 9

< 13

< 11

< 7

< 36

< 13

< 14 07/28/20 233 +/- 86

< 163

< 8

< 24

< 10

< 17

< 9

< 11

< 14

< 8

< 37

< 11

< 16 11/03/20 202 +/- 98

< 98

< 5

< 15

< 5

< 12

< 7

< 10

< 12

< 6

< 7

< 30

< 10

< 11 AVERAGE 239 +/- 60 4S9 01/15/20

< 144

< 35

< 5

< 7

< 13

< 6

< 13

< 6

< 12

< 11

< 6

< 30

< 8

< 13 04/25/20

< 140

< 56

< 3

< 4

< 10

< 3

< 7

< 4

< 5

< 7

< 3

< 4

< 18

< 6

< 6 07/23/20

< 127

< 105

< 5

< 6

< 12

< 6

< 9

< 6

< 8

< 15

< 5

< 33

< 10

< 11 11/05/20

< 145

< 115

< 7

< 6

< 17

< 6

< 13

< 7

< 11

< 10

< 6

< 27

< 8

< 11 AVERAGE 6S11A 01/13/20

< 147

< 61

< 6

< 5

< 15

< 5

< 11

< 6

< 11

< 5

< 7

< 29

< 12

< 11 04/28/20

< 146

< 127

< 6

< 17

< 6

< 12

< 6

< 9

< 12

< 6

< 35

< 12

< 14 07/27/20

< 128

< 108

< 6

< 5

< 16

< 10

< 15

< 7

< 14

< 13

< 4

< 7

< 32

< 11

< 13 11/5/2020

< 144

< 59

< 6

< 7

< 15

< 7

< 15

< 7

< 12

< 9

< 6

< 7

< 36

< 15

< 14 AVERAGE

<----------GAMMA EMITTERS---------->

SUSQUEHANNA STEAM ELECTRIC STATION, 2020 K-40 C-12

TABLE C-6 TRITIUM AND GAMMA SPECTROSCOPIC ANALYSES OF GROUNDWATER Results in pCi/Liter +/- 2 sigma COLLECTION SITE DATE H-3 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 I-131 Cs-134 Cs-137 Ba-140 La-140 Th-228

<----------GAMMA EMITTERS---------->

SUSQUEHANNA STEAM ELECTRIC STATION, 2020 K-40 6S12 01/15/20

< 143

< 127

< 7

< 8

< 22

< 7

< 13

< 8

< 13

< 7

< 6

< 39

< 10

< 14 04/25/20

< 139

< 135

< 7

< 16

< 6

< 15

< 7

< 8

< 14

< 6

< 7

< 35

< 12

< 14 07/27/20

< 127

< 110

< 5

< 7

< 13

< 10

< 12

< 7

< 9

< 5

< 21

< 14

< 11 11/02/20

< 145

< 112

< 5

< 6

< 15

< 6

< 12

< 6

< 10

< 13

< 6

< 5

< 34

< 9

< 12 AVERAGE 7S10 01/13/20

< 144

< 93

< 4

< 5

< 16

< 7

< 11

< 7

< 11

< 6

< 27

< 9

< 12 04/25/20

< 136

< 120

< 7

< 16

< 8

< 14

< 8

< 13

< 14

< 8

< 9

< 34

< 12

< 11 07/23/20 129 +/- 82

< 58

< 7

< 5

< 19

< 8

< 12

< 7

< 10

< 15

< 6

< 5

< 35

< 13

< 12 11/02/20

< 148

< 86

< 5

< 14

< 4

< 13

< 5

< 9

< 11

< 6

< 5

< 30

< 8

< 11 AVERAGE 129 +/- 0 7S11 01/13/20

< 140

< 89

< 4

< 6

< 15

< 7

< 9

< 6

< 10

< 11

< 5

< 4

< 30

< 13

< 11 04/25/20

< 139

< 95

< 6

< 15

< 7

< 13

< 7

< 9

< 10

< 5

< 6

< 34

< 12

< 11 07/23/20

< 126

< 73

< 5

< 10

< 5

< 10

< 5

< 7

< 13

< 5

< 4

< 29

< 11

< 9 11/25/20

< 147

< 98

< 6

< 7

< 23

< 9

< 12

< 7

< 11

< 10

< 4

< 5

< 29

< 10

< 12 AVERAGE 8S4 01/14/20

< 149

< 102

< 7

< 6

< 16

< 5

< 14

< 5

< 10

< 7

< 32

< 5

< 13 04/28/20

< 142

< 127

< 3

< 7

< 15

< 7

< 12

< 7

< 13

< 11

< 7

< 9

< 28

< 13

< 12 07/28/20 158 +/- 83

< 101

< 6

< 8

< 13

< 9

< 10

< 7

< 9

< 10

< 6

< 7

< 25

< 10

< 14 11/03/20

< 141

< 119

< 6

< 7

< 13

< 7

< 11

< 7

< 11

< 13

< 6

< 7

< 26

< 9

< 14 AVERAGE 158 +/- 0 1S4 11/30/20

< 143

< 146

< 6

< 8

< 24

< 9

< 13

< 10

< 13

< 11

< 7

< 33

< 7

< 16 AVERAGE C-13

TABLE C-7 ANNUAL AVERAGE TRITIUM CONCENTRATION IN PRECIPITATION, MONITORING WELLS AND LAKE TOOK-A-WHILE (LTAW) SURFACE WATER DATA SUSQUEHANNA STEAM ELECTRIC STATION, 2020 Results in pCi/Liter +/- 2 sigma SITE 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 Precip Sites 3S2**, 12S1**, 8G1** (offsite, controls) 62*

49 40 38 82 63 51 39 45 32 45 Precip Sites 1 and 2 (onsite, East of Station Reactor Bldgs) 370 230*

193 216 242 182 142 250 206 251 325 333 252 Precipitation Sites 3 and 4 (onsite, West of Station Reactor Bldgs) 414 404*

350 233 169 151 231 258 197 383 494 355 350 1S3 - MW-1 (43')

248 150 252 131 164 197 115 169 175 130 218 253 200 1S4 - Tap Water Sample Not sampled Not sampled Not sampled Not sampled Not sampled Not sampled Not sampled Not sampled Not sampled Not sampled Not sampled Not sampled 28 4S8 - MW-2 (45')

292 154 190 173 137 202 187 138 154 138 191 196 239 4S9 - MW-3 (94')

127 54 150 64 80 135 94 180 125 55 109 92 77 8S4 - MW-4 (111')

172 66 105 68 81 109 60 162 145 91 102 155 96 7S10 - MW-5 (36')

171 69 96

-6 74 106 68 70 73 51 93 125 86 13S7 - MW-6 (16')

142 134 143 34 80 111 71 79 111 107 122 120 150 2S8 - MW-7 (85')

Not installed Not installed Not installed 22 54 72 70 70 74 56 37 71 63 6S11A - MW-8A (14')

177 82 165 58 15 72 103 110 63 38 50 83 72 6S11B - MW-8B (19')

Dry well Dry well Dry well Dry well Dry well Dry well Dry well Dry well Dry well Dry well Dry well Dry well Dry well 6S12 - MW-9 (28')

30

-44 45 18 6

60 21 57 70 5

27 50 47 7S11 - MW-10 (132')

3

-27

-9 1

-1 23 29 55 13 1

33 16 3

- 12F3 - Groundwater Control 26

-53

-2 5

-6 45

-26 20 41 61 82

- LTAW-Surface Water 179 104 110 132 132 145 27 73 89 77 135

Revised values to reflect full scope of precipitation data.

- Stations were discontinued after 5/30/18.

C-14

TABLE C-8 GROSS BETA, TRITIUM AND GAMMA SPECTROSCOPIC ANALYSES OF DRINKING WATER SUSQUEHANNA STEAM ELECTRIC STATION, 2020 Results in pCi/Liter +/- 2 sigma COLLECTION PERIOD

<----------GAMMA EMITTERS---------->

SITE START STOP Gr-B H-3 K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 I-131 Cs-134 Cs-137 Ba-140 La-140 12H2 12/31/19 - 01/28/20 4.1 +/- 1

< 136

< 13

< 1

< 2

< 4

< 1

< 3

< 2

< 3

< 7

< 1

< 13

< 5 12H2 01/28/20 - 02/25/20

< 1.6

< 124

< 34

< 2

< 5

< 2

< 3

< 2

< 3

< 10

< 2

< 18

< 6 12H2 02/25/20 - 03/31/20

< 1.9

< 139

< 26

< 2

< 6

< 2

< 4

< 2

< 3

< 9

< 2

< 16

< 5 12H2 03/31/20 - 04/27/20 2.7 +/- 1.2

< 143

< 24

< 1

< 2

< 5

< 2

< 3

< 2

< 3

< 8

< 1

< 2

< 15

< 5 12H2 04/27/20 - 05/26/20

< 2.3

< 143

< 16

< 2

< 5

< 2

< 3

< 2

< 3

< 9

< 2

< 17

< 6 12H2 05/26/20 - 06/30/20

< 2.1

< 129

< 15

< 2

< 5

< 2

< 3

< 2

< 3

< 11

< 2

< 18

< 6 12H2 06/30/20 - 07/28/20 2.8 +/- 1.4

< 127

< 18

< 2

< 6

< 2

< 4

< 2

< 4

< 14

< 2

< 23

< 8 12H2 07/28/20 - 08/25/20 2.6 +/- 1.6

< 148

< 32

< 2

< 5

< 2

< 3

< 2

< 3

< 9

< 2

< 16

< 6 12H2 08/25/20 - 09/29/20 2.7 +/- 1.5

< 143

< 37

< 2

< 5

< 2

< 3

< 2

< 3

< 10

< 2

< 16

< 5 12H2 09/29/20 - 10/27/20

< 1.9

< 139

< 25

< 2

< 5

< 2

< 3

< 2

< 3

< 9

< 2

< 15

< 5 12H2 10/27/20 - 11/23/20 4.1 +/- 1.4

< 146

< 28

< 2

< 6

< 2

< 3

< 2

< 3

< 9

< 2

< 17

< 6 12H2 11/23/20 - 12/29/20

< 2.2

< 131

< 29

< 2

< 6

< 2

< 4

< 2

< 4

< 14

< 2

< 23

< 9 AVERAGE 3.2 +/- 1.5 C-15

TABLE C-9 GAMMA SPECTROSCOPIC ANALYSES OF FOOD PRODUCTS (FRUITS, VEGETABLES AND BROADLEAF)

SUSQUEHANNA STEAM ELECTRIC STATION, 2020 Results in pCi/kg (wet) +/- 2 sigma COLLECTION SITE DATE Be-7 K-40 I-131 Cs-134 Cs-137 Ac-228 Th-228 11D1 11/24/20

< 286 2879 +/- 757

< 58

< 26

< 37

< 105

< 57 11/24/20

< 208 2490 +/- 446

< 49

< 20

< 21

< 106

< 42 11/24/20

< 261 15000 +/- 1091

< 54

< 24

< 36

< 141

< 41 AVERAGE 6790 +/- 14226 11S6 06/29/20

< 180 3713 +/- 423

< 19

< 18

< 22

< 74

< 38 06/29/20 336 +/- 178 4701 +/- 479

< 19

< 17

< 16

< 75

< 33 07/27/20

< 229 4567 +/- 502

< 23

< 17

< 20

< 82

< 35 07/27/20 319 +/- 163 3959 +/- 486

< 23

< 19

< 20

< 83

< 36 08/24/20

< 210 4530 +/- 535

< 26

< 22

< 21

< 88

< 47 08/24/20

< 186 5706 +/- 590

< 26

< 21

< 19

< 96

< 41 09/28/20 289 +/- 185 3904 +/- 497

< 31

< 23

< 25

< 101

< 43 09/28/20

< 248 3421 +/- 532

< 27

< 20

< 25

< 118

< 41 10/26/20 446 +/- 130 3999 +/- 416

< 18

< 15

< 16

< 69

< 28 10/26/20 272 +/- 131 3042 +/- 321

< 16

< 14

< 16

< 58

< 28 AVERAGE 332 +/- 136 4154 +/- 1507 12F7 07/30/20

< 373 2694 +/- 759

< 47

< 42

< 38

< 166

< 62 12/04/20

< 174 2511 +/- 458

< 28

< 19

< 24

< 87

< 32 AVERAGE 2603 +/- 259 C-16

TABLE C-10 TRITIUM AND GAMMA SPECTROSCOPIC ANALYSES OF SURFACE WATER SUSQUEHANNA STEAM ELECTRIC STATION, 2020 Results in pCi/Liter +/- 2 sigma COLLECTION SITE PERIOD H-3 K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 I-131 Cs-134 Cs-137 Ba-140 La-140 Th-228 6S6 12/31/19 - 01/28/20

< 137

< 25

< 2

< 6

< 2

< 4

< 2

< 3

< 9

< 2

< 17

< 6

< 3 01/28/20 - 02/25/20

< 130

< 16

< 1

< 2

< 5

< 2

< 3

< 2

< 3

< 9

< 2

< 15

< 5

< 3 02/25/20 - 03/31/20

< 142

< 23

< 1

< 2

< 5

< 2

< 3

< 2

< 3

< 8

< 1

< 2

< 14

< 4

< 3 03/31/20 - 04/27/20

< 143

< 31

< 2

< 5

< 2

< 3

< 2

< 3

< 10

< 2

< 17

< 6

< 3 04/27/20 - 05/26/20

< 144

< 33

< 2

< 5

< 2

< 3

< 2

< 3

< 10

< 2

< 16

< 6

< 3 05/26/20 - 06/30/20

< 131

< 17

< 2

< 7

< 2

< 4

< 2

< 4

< 15

< 2

< 25

< 8

< 3 06/30/20 - 07/28/20

< 127

< 29

< 2

< 8

< 2

< 5

< 3

< 4

< 14

< 2

< 25

< 8

< 4 07/28/20 - 08/25/20

< 149

< 15

< 1

< 2

< 5

< 2

< 3

< 2

< 3

< 8

< 1

< 15

< 5

< 3 08/25/20 - 08/30/20

< 148

< 31

< 1

< 2

< 6

< 1

< 3

< 2

< 3

< 12

< 1

< 2

< 34

< 11

< 3 10/13/20 - 10/27/20 169 +/- 90

< 86

< 4

< 5

< 17

< 6

< 9

< 6

< 9

< 14

< 5

< 31

< 11

< 10 10/27/20 - 11/23/20

< 144

< 16

< 2

< 5

< 2

< 3

< 2

< 3

< 9

< 1

< 2

< 15

< 5

< 3 11/23/20 - 12/29/20

< 135

< 15

< 2

< 6

< 2

< 3

< 2

< 3

< 14

< 2

< 21

< 7

< 3 AVERAGE 169 +/- 0 2S7 12/31/19 - 01/28/20 230 +/- 98

< 32

< 2

< 6

< 2

< 4

< 2

< 4

< 9

< 2

< 18

< 6

< 3 01/28/20 - 02/25/20 3750 +/- 427

< 26

< 1

< 2

< 5

< 2

< 3

< 2

< 3

< 7

< 1

< 15

< 5

< 3 02/25/20 - 03/31/20 238 +/- 98

< 36

< 2

< 5

< 2

< 4

< 2

< 3

< 9

< 2

< 18

< 5

< 3 03/31/20 - 04/27/20 1050 +/- 173

< 15

< 2

< 5

< 2

< 3

< 2

< 3

< 10

< 2

< 17

< 6

< 3 04/27/20 - 05/26/20 9190 +/- 975

< 8

< 1

< 2

< 1

< 2

< 1

< 2

< 4

< 1

< 8

< 2

< 2 05/26/20 - 06/30/20 695 +/- 132

< 26

< 2

< 5

< 2

< 3

< 2

< 3

< 13

< 2

< 20

< 6

< 3 06/30/20 - 07/28/20 194 +/- 87

< 30

< 2

< 5

< 2

< 3

< 2

< 4

< 11

< 2

< 18

< 6

< 3 07/28/20 - 08/25/20 725 +/- 147

< 14

< 2

< 6

< 2

< 3

< 2

< 3

< 9

< 1

< 2

< 16

< 5

< 3 08/25/20 - 09/29/20 1350 +/- 201

< 25

< 2

< 5

< 2

< 3

< 2

< 3

< 9

< 1

< 15

< 5

< 3 09/29/20 - 10/27/20 854 +/- 150

< 17

< 2

< 6

< 2

< 4

< 2

< 4

< 9

< 2

< 18

< 6

< 3 10/27/20 - 11/23/20 165 +/- 96

< 30

< 2

< 6

< 2

< 4

< 2

< 4

< 10

< 2

< 18

< 7

< 3 11/23/20 - 12/29/20 520 +/- 103

< 15

< 2

< 5

< 1

< 3

< 2

< 3

< 14

< 1

< 2

< 21

< 7

< 3 AVERAGE 1580 +/- 5176

<----------GAMMA EMITTERS---------->

C-17

TABLE C-10 TRITIUM AND GAMMA SPECTROSCOPIC ANALYSES OF SURFACE WATER SUSQUEHANNA STEAM ELECTRIC STATION, 2020 Results in pCi/Liter +/- 2 sigma COLLECTION SITE PERIOD H-3 K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 I-131 Cs-134 Cs-137 Ba-140 La-140 Th-228

<----------GAMMA EMITTERS---------->

6S5 01/07/20 - 01/28/20

< 139

< 27

< 2

< 6

< 2

< 3

< 2

< 3

< 6

< 2

< 13

< 5

< 3 02/04/20 - 02/25/20

< 123

< 17

< 2

< 5

< 2

< 4

< 2

< 4

< 8

< 2

< 15

< 4

< 3 03/03/20 - 03/31/20

< 142

< 32

< 2

< 6

< 2

< 4

< 2

< 3

< 7

< 2

< 14

< 4

< 3 04/07/20 - 04/27/20

< 144

< 30

< 2

< 6

< 2

< 4

< 2

< 4

< 7

< 2

< 16

< 6

< 3 05/05/20 - 05/26/20

< 148

< 28

< 2

< 6

< 2

< 4

< 2

< 3

< 7

< 2

< 15

< 6

< 3 06/02/20 - 06/30/20

< 128

< 39

< 2

< 6

< 2

< 4

< 2

< 4

< 12

< 2

< 22

< 6

< 3 07/07/20 - 07/28/20

< 127

< 28

< 2

< 5

< 2

< 3

< 2

< 3

< 9

< 1

< 2

< 16

< 5

< 3 08/04/20 - 08/25/20

< 148

< 28

< 2

< 6

< 2

< 4

< 2

< 4

< 7

< 2

< 15

< 6

< 3 09/01/20 - 09/29/20

< 145

< 40

< 2

< 6

< 2

< 4

< 2

< 4

< 8

< 2

< 16

< 5

< 3 10/06/20 - 10/27/20

< 141

< 19

< 2

< 7

< 2

< 4

< 2

< 4

< 9

< 2

< 19

< 6

< 4 11/03/20 - 11/23/20

< 148

< 32

< 2

< 6

< 2

< 4

< 2

< 4

< 8

< 2

< 16

< 6

< 3 12/01/20 - 12/29/20

< 137

< 30

< 2

< 6

< 2

< 4

< 2

< 4

< 11

< 2

< 20

< 6

< 3 AVERAGE 5S9 09/08/20 - 09/29/20

< 146

< 32

< 1

< 2

< 5

< 2

< 3

< 2

< 3

< 6

< 1

< 2

< 12

< 4

< 3 10/06/20 - 10/13/20

< 140

< 32

< 2

< 6

< 2

< 3

< 2

< 3

< 13

< 1

< 2

< 20

< 7

< 3 AVERAGE C-18

TABLE C-11 GAMMA SPECTROSCOPIC ANALYSIS OF FISH SUSQUEHANNA STEAM ELECTRIC STATION, 2020 Results in pCi/kg (wet) +/- 2 sigma COLLECTION SITE DATE K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Cs-134 Cs-137 2H Quillback 05/13/20 3250 +/- 822

< 49

< 41

< 159

< 42

< 87

< 45

< 40 Walleye 05/13/20 3241 +/- 981

< 54

< 48

< 138

< 47

< 59

< 47

< 53 Smallmouth Bass 05/13/20 3231 +/- 1137

< 76

< 89

< 173

< 85

< 162

< 93

< 63 Walleye 10/31/20 3759 +/- 997

< 64

< 57

< 174

< 36

< 116

< 53

< 71 Quillback 10/31/20 2883 +/- 788

< 59

< 53

< 128

< 74

< 116

< 65

< 68 Smallmouth Bass 10/31/20 2629 +/- 1017

< 83

< 96

< 215

< 69

< 201

< 91

< 91 AVERAGE 3166 +/- 768 IND Quillback 05/12/20 3537 +/- 860

< 40

< 44

< 206

< 37

< 141

< 52

< 60 Walleye 05/12/20 4117 +/- 1144

< 70

< 194

< 65

< 132

< 57

< 73 Smallmouth Bass 05/12/20 3648 +/- 745

< 44

< 42

< 124

< 47

< 98

< 49

< 50 Walleye 10/30/20 3092 +/- 906

< 64

< 49

< 101

< 63

< 124

< 51

< 69 Smallmouth Bass 10/30/20 3601 +/- 1100

< 52

< 63

< 165

< 38

< 111

< 46

< 47 Quillback 10/30/20 2791 +/- 1040

< 60

< 69

< 163

< 62

< 137

< 64

< 56 AVERAGE 3464 +/- 928 LTAW Gizzard Shad 10/31/20 3588 +/- 828

< 53

< 50

< 118

< 44

< 120

< 59

< 46 Largemouth Bass 10/31/20 4002 +/- 960

< 62

< 56

< 110

< 64

< 122

< 52

< 57 AVERAGE 3795 +/- 585 C-19

TABLE C-12 GAMMA SPECTROSCOPIC ANALYSES OF SHORELINE SEDIMENT SUSQUEHANNA STEAM ELECTRIC STATION, 2020 Results in pCi/kg (dry) +/- 2 sigma COLLECTION SITE DATE K-40 Cs-134 Cs-137 Ac-228 Th-228 2B 04/17/20 18220 +/- 2198

< 81

< 113

< 1691 1411 +/- 373 1339 +/- 154 09/28/20 9175 +/- 1757

< 81

< 103

< 2142 989 +/- 300 856 +/- 185 AVERAGE 13698 +/- 12792 1200 +/- 597 1098 +/- 683 7B 04/17/20 11770 +/- 1619

< 75

< 59

< 1663 1143 +/- 285 1077 +/- 118 09/28/20 9725 +/- 1384

< 67

< 78

< 1852 817 +/- 373 773 +/- 125 AVERAGE 10748 +/- 2892 980 +/- 461 925 +/- 430 12F 04/17/20 10960 +/- 1634

< 83

< 94

< 1885 979 +/- 301 1114 +/- 191 09/28/20 15790 +/- 2498

< 121

< 170

< 3183 1430 +/- 678 997 +/- 318 AVERAGE 13375 +/- 6831 1205 +/- 638 1056 +/- 165 Ra-226 C-20

0 50 100 150 200 250 300 350 400 450 500 FIGURE C GROSS BETA ACTIVITY IN AIR PARTICULATES Indicator Control PREOPERATIONAL OPERATIONAL A

E B

C D

F Unit 2 Criticality 05/08/1984 CHERNOBYL 4/26/86 CHINESE WEAPONS TEST A - 06/17/74 B - 09/26/76 C - 11/17/76 D - 09/17/77 E - 03/14/78 F - 10/15/80 Unit 1 Criticality 09/10/1982 E-3 pCi/m3 C-21

0 5

10 15 20 25 30 35 40 45 50 1973 1975 1977 1979 1981 1983 1985 1987 1989 1991 1993 1995 1997 1999 2001 2003 2005 2007 2009 2011 2013 2015 2017 2019 2021 Dose Rate (mrem/STD Qtr)

FIGURE C AMBIENT RADIATION LEVELS BASED ON ENVIRONMENTAL DOSIMETRY DATA Indicator Control PREOPERATIONAL OPERATIONAL Unit 2 Criticality 05/08/1984 Unit 1 Criticality 09/10/1982 Changed from TLD to OSLD system 01/18/12 C-22

\\ I

\\

0 10 20 30 40 50 60 70 80 90 100 pCi/L FIGURE C IODINE-131 ACTIVITY IN MILK Indicator Control PREOPERATIONAL OPERATIONAL A

B C

CHERNOBYL 4/26/86 Unit 2 Criticality 05/08/1984 CHINESE WEAPONS TEST A - 09/12/77 B - 03/14/78 C - 10/15/80 Unit 1 Criticality 09/10/1982 C-23 I

X

)

\\

)

> l

)

~

)

FIGURE C ANNUAL AVERAGE TRITIUM ACTIVITY IN PRECIPITATION AND SURFACE WATER VERSUS GROUND WATER

-100 0

100 200 300 400 500 600 700 800 900 1000 1100 1200 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 Investigation Level MDC pCi/L C-24

'"~ t #~ #~ #:, #'I>, #!', #~ #~

~~

~ #~

~

>§

~

-~~

v"'

-~ ~l -

0 1

2 3

4 5

6 7

8 9

10 pCi/L FIGURE C GROSS BETA ACTIVITY IN DRINKING WATER PREOPERATIONAL OPERATIONAL Unit 2 Criticality 05/08/1984 Unit 1 Criticality 09/10/1982 C-25

-500 500 1500 2500 3500 pCi/L FIGURE C TRITIUM ACTIVITY IN SURFACE WATER Indicator Control PREOPERATIONAL OPERATIONAL Unit 2 Criticality 05/08/1984 Unit 1 Criticality 09/10/1982 C-26

APPENDIX D

SUMMARY

OF RESULTS FROM ANALYTICS, ENVIRONMENTAL RESOURCE ASSOCIATES (ERA),

AND DEPARTMENT OF ENERGY (DOE) - MIXED ANALYTE PERFORMANCE EVALUATION PROGRAM (MAPEP)

D-1

Table D-1 Month/Year Identification Number Matrix Nuclide Units TBE Value Known Value (a)

Ratio of TBE to Known Result Evaluation (b)

September 2020 E13247 Milk Sr-89 pCi/L 62.8 95.4 0.66 N(1)

Sr-90 pCi/L 12.0 12.8 0.94 A

E13248 Milk Ce-141 pCi/L 156 150 1.04 A

Co-58 pCi/L 172 180 0.96 A

Co-60 pCi/L 369 379 0.97 A

Cr-51 pCi/L 372 372 1.00 A

Cs-134 pCi/L 171 200 0.85 A

Cs-137 pCi/L 241 250 0.96 A

Fe-59 pCi/L 217 200 1.08 A

I-131 pCi/L 84.6 95.0 0.89 A

Mn-54 pCi/L 175 180 0.97 A

Zn-65 pCi/L 252 270 0.93 A

E13249 Charcoal I-131 pCi 70.2 75.8 0.93 A

E13250 AP Ce-141 pCi 101 101 1.00 A

Co-58 pCi 111 120 0.92 A

Co-60 pCi 249 254 0.98 A

Cr-51 pCi 287 249 1.15 A

Cs-134 pCi 114 134 0.85 A

Cs-137 pCi 159 168 0.95 A

Fe-59 pCi 127 134 0.95 A

Mn-54 pCi 114 121 0.94 A

Zn-65 pCi 168 181 0.93 A

E13251 Soil Ce-141 pCi/g 0.241 0.191 1.26 W

Co-58 pCi/g 0.211 0.228 0.93 A

Co-60 pCi/g 0.466 0.481 0.97 A

Cr-51 pCi/g 0.450 0.472 0.95 A

Cs-134 pCi/g 0.273 0.254 1.07 A

Cs-137 pCi/g 0.370 0.390 0.95 A

Fe-59 pCi/g 0.233 0.254 0.92 A

Mn-54 pCi/g 0.217 0.229 0.95 A

Zn-65 pCi/g 0.368 0.343 1.07 A

E13252 AP Sr-89 pCi 79.9 100.0 0.80 A

Sr-90 pCi 12.1 13.4 0.90 A

(a) The Analytics known value is equal to 100% of the parameter present in the standard as determined by gravimetric and/or volumetric measurements made during standard preparation (b)

Analytics evaluation based on TBE internal QC limits:

A = Acceptable - reported result falls within ratio limits of 0.80-1.20 W = Acceptable with warning - reported result falls within 0.70-0.80 or 1.20-1.30 N = Not Acceptable - reported result falls outside the ratio limits of < 0.70 and > 1.30 Analytics Environmental Radioactivity Cross Check Program Teledyne Brown Engineering Environmental Services (Page 1 of 4)

(1) See NCR 20-19 D-2

Table D-1 Month/Year Identification Number Matrix Nuclide Units TBE Value Known Value (a)

Ratio of TBE to Known Result Evaluation (b)

Analytics Environmental Radioactivity Cross Check Program Teledyne Brown Engineering Environmental Services December 2020 E13254 Milk Sr-89 pCi/L 82.2 89.7 0.92 A

Sr-90 pCi/L 12.4 13.0 0.96 A

E13255 Milk Ce-141 pCi/L 91.1 100 0.91 A

Co-58 pCi/L 77.5 84.3 0.92 A

Co-60 pCi/L 147 152 0.97 A

Cr-51 pCi/L 259 253 1.02 A

Cs-134 pCi/L 97.1 108 0.90 A

Cs-137 pCi/L 117 127 0.92 A

Fe-59 pCi/L 114 112 1.02 A

I-131 pCi/L 84.3 91.9 0.92 A

Mn-54 pCi/L 137 143 0.96 A

Zn-65 pCi/L 175 190 0.92 A

E13256 Charcoal I-131 pCi 70.2 78.2 0.90 A

E13257A AP Ce-141 pCi 67.4 74.6 0.90 A

Co-58 pCi 57.9 62.9 0.92 A

Co-60 pCi 108 113 0.95 A

Cr-51 pCi 162 189 0.86 A

Cs-134 pCi 68.1 80.4 0.85 A

Cs-137 pCi 82.4 95.0 0.87 A

Fe-59 pCi 80.5 83.7 0.96 A

Mn-54 pCi 102 107 0.95 A

Zn-65 pCi 115 142 0.81 A

E13258 Soil Ce-141 pCi/g 0.167 0.170 0.98 A

Co-58 pCi/g 0.125 0.143 0.87 A

Co-60 pCi/g 0.245 0.257 0.95 A

Cr-51 pCi/g 0.393 0.429 0.92 A

Cs-134 pCi/g 0.147 0.183 0.80 A

Cs-137 pCi/g 0.260 0.288 0.90 A

Fe-59 pCi/g 0.199 0.190 1.05 A

Mn-54 pCi/g 0.229 0.243 0.94 A

Zn-65 pCi/g 0.320 0.322 0.99 A

E13259 AP Sr-89 pCi 85.0 78.6 1.08 A

Sr-90 pCi 13.1 11.4 1.15 A

(a) The Analytics known value is equal to 100% of the parameter present in the standard as determined by gravimetric and/or volumetric measurements made during standard preparation (b)

Analytics evaluation based on TBE internal QC limits:

A = Acceptable - reported result falls within ratio limits of 0.80-1.20 W = Acceptable with warning - reported result falls within 0.70-0.80 or 1.20-1.30 N = Not Acceptable - reported result falls outside the ratio limits of < 0.70 and > 1.30 (Page 2 of 4)

D-3

Table D-2 Month/Year Identification Number Matrix Nuclide Units TBE Value Known Value (a)

Acceptance Range Evaluation (b)

February 2020 20-GrF42 AP Gross Alpha Bq/sample 0.676 1.24 0.37 - 2.11 A

Gross Beta Bq/sample 2.03 2.00 1.00 - 3.00 A

20-MaS42 Soil Ni-63 Bq/kg 0.01 (1)

A Sr-90 Bq/kg 348 340 238 - 442 A

20-MaW42 Water Ni-63 Bq/L 11.6 11.1 7.8 - 14.4 A

Pu-238 Bq/L 0.926 0.94 0.66 - 1.22 A

Pu-239/240 Bq/L 0.712 0.737 0.516 - 0.958 A

20-RdF42 AP U-234/233 Bq/sample 0.0416 0.075 0.053 - 0.098 N(3)

U-238 Bq/sample 0.0388 0.078 0.055 - 0.101 N(3) 20-RdV42 Vegetation Cs-134 Bq/sample 3.23 3.82 2.67 - 4.97 A

Cs-137 Bq/sample 2.64 2.77 1.94 - 3.60 A

Co-57 Bq/sample 0.0281 (1)

A Co-60 Bq/sample 2.62 2.79 1.95 - 3.63 A

Mn-54 Bq/sample 4.3 4.58 3.21 - 5.95 A

Sr-90 Bq/sample 0.396 0.492 0.344 - 0.640 A

Zn-65 Bq/sample 3.93 3.79 2.65 - 4.93 A

August 2020 20-GrF43 AP Gross Alpha Bq/sample 0.267 0.528 0.158 - 0.989 A

Gross Beta Bq/sample 0.939 0.915 0.458 - 1.373 A

20-MaS43 Soil Ni-63 Bq/kg 438 980 686 - 1274 N(4)

Tc-99 Bq/kg 1.11 (1)

A 20-MaW43 Water Ni-63 Bq/L 0.175 (1)

A Tc-99 Bq/L 8.8 9.4 6.6 - 12.2 A

20-RdV43 Vegetation Cs-134 Bq/sample 3.635 4.94 3.46 - 6.42 W

Cs-137 Bq/sample 0.0341 (1)

A Co-57 Bq/sample 5.855 6.67 4.67 - 8.67 W

Co-60 Bq/sample 3.122 4.13 2.89 - 5.37 W

Mn-54 Bq/sample 4.524 5.84 4.09 - 7.59 A

Sr-90 Bq/sample 1.01 1.39 0.97 - 1.81 W

Zn-65 Bq/sample 4.706 6.38 4.47 - 8.29 W

(a) The MAPEP known value is equal to 100% of the parameter present in the standard as determined by gravimetric and/or volumetric measurements made during standard preparation (b) DOE/MAPEP evaluation:

A = Acceptable - reported result falls within ratio limits of 0.80-1.20 W = Acceptable with warning - reported result falls within 0.70-0.80 or 1.20-1.30 N = Not Acceptable - reported result falls outside the ratio limits of < 0.70 and > 1.30 (1) False positive test (2) Sensitivity evaluation (3) See NCR 20-13 (4) See NCR 20-20 DOE's Mixed Analyte Performance Evaluation Program (MAPEP)

Teledyne Brown Engineering Environmental Services (Page 3 of 4)

D-4

Table D-3 Month/Year Identification Number Matrix Nuclide Units TBE Value Known Value (a)

Acceptance Limits Evaluation (b)

March 2020 MRAD-32 Water Am-241 pCi/L 52.5 45.3 31.1 - 57.9 A

Fe-55 pCi/L 155 152 89.3 - 221 A

Pu-238 pCi/L 34.0 36.4 21.9 - 47.2 A

Pu-239 pCi/L 30.9 33.6 20.8 - 41.4 A

April 2020 RAD-121 Water Ba-133 pCi/L 41.8 41.8 34.0- 46.7 A

Cs-134 pCi/L 42.9 46.3 37.1 - 50.9 A

Cs-137 pCi/L 226 234 211 - 259 A

Co-60 pCi/L 52.4 50.3 45.3 - 57.9 A

Zn-65 pCi/L 83.3 86.8 78.1 - 104 A

GR-A pCi/L 20.1 23.6 11.9 - 31.6 A

GR-B pCi/L 45.6 60.5 41.7 - 67.2 A

U-Nat pCi/L 18.45 18.6 14.9 - 20.9 A

H-3 pCi/L 14200 14100 12300 - 15500 A

Sr-89 pCi/L 58.0 60.1 48.3 - 67.9 A

Sr-90 pCi/L 34.1 44.7 33.0 - 51.2 A

I-131 pCi/L 27.4 28.9 24.1 - 33.8 A

September 2020 MRAD-33 Soil Sr-90 pCi/Kg 4360 4980 1550 - 7760 A

AP Fe-55 pCi/Filter 189 407 149 - 649 A

U-234 pCi/Filter 17.9 18.3 13.6 - 21.4 A

U-238 pCi/Filter 19.1 18.1 13.7 - 21.6 A

Water Am-241 pCi/L 160 176 121 - 225 A

Fe-55 pCi/L 299 298 175 - 433 A

Pu-238 pCi/L 200 191 115 - 247 A

Pu-239 pCi/L 105 100 61.9 - 123 A

October 2020 RAD-123 Water Ba-133 pCi/L 37.1 37.0 29.8 - 41.6 A

Cs-134 pCi/L 50.6 52.7 42.5 - 58.0 A

Cs-137 pCi/L 131 131 118 - 146 A

Co-60 pCi/L 62.9 60.5 54.4 - 69.1 A

Zn-65 pCi/L 167 162 146 - 191 A

GR-A pCi/L 40.0 26.2 13.3 - 34.7 N(1)

GR-B pCi/L 47.5 69.1 48.0 - 76.0 N(1)

U-Nat pCi/L 17.2 20.3 16.3 - 22.7 A

H-3 pCi/L 23800 23200 20,300 - 25,500 A

Sr-89 pCi/L 41.1 43.3 33.4 - 50.5 A

Sr-90 pCi/L 28.5 30.2 22.0 - 35.0 A

I-131 pCi/L 22.9 28.2 23.5 - 33.1 N(2)

November 2020 QR111920K Water GR-A pCi/L 50.7 52.4 27.3 - 65.6 A

GR-B pCi/L 24.9 24.3 15.0 - 32.3 A

(a) The ERA known value is equal to 100% of the parameter present in the standard as determined by gravimetric and/or volumetric measurements made during standard preparation.

(b) ERA evaluation:

A = Acceptable - Reported value falls within the Acceptance Limits N = Not Acceptable - Reported value falls outside of the Acceptance Limits (1) See NCR 20-18 (2) See NCR 20-17 ERA Environmental Radioactivity Cross Check Program Teledyne Brown Engineering Environmental Services (Page 4 of 4)

D-5

APPENDIX E REMP SAMPLE EQUIPMENT OPERABILITY TRENDING E-1

SAMPLING MEDIA SAMPLE LOCATION DESCRIPTION 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 Air Particulate 3S2 SSES Backup Met. Tower 99.9 99.3 98.9 99.9 100 99 100 99.9 99.9 100.0 99.4

& Charcoal 12S1 West Building 99.9 100 99.9 99.9 100 100 100 99.1 99.7 99.9 99.9 13S6 Former Laydown Area, West of Confers Lane 100 99.7 99.1 99.9 100 97 100 100 99.9 99.9 99.9 12E1 Berwick Hospital 100 100 99.9 100.0 100 98 99.1 100 100 100 100.0 6G1 Freeland Substation 100 100 99.9 99.9 100 90*

100 100 100 No longer in service No longer in service 8G1 PPL System Facilities Center, Humboldt Industrial Park 99.7 100 99.8 99.9 100 100 99.2 99.9 99.9 99.9 99.9 10S3 E of Confers Lane, S of Towers Club 100 99.5 99.9 99.2 98.9 9B1 Transmission Line, E of Route 11 100 99.9 99.9 99.9 100.0 Drinking Water 12H2 Danville Water Company 100 100 100 100.0 100 100 100 100 100 98.1 100.0 Surface Water 2S7 Cooling Tower Blowdown Discharge Line 98.0 99.1 98.1 98.1 69**

100 99.1 100 100 99.9 99.9 6S6 River Water Intake Line 100 95.5 93.4 93.2 93 98 99.7 99.9 99.9 99.9 88.1***

Planned power outage by Electric Utilities

- Auto-Compsite sampler problems, March through June. New Auto-Compsite sampler installed in July.

- - Auto-Compsite sampler taken OOS 8/30/20. New Auto-Compsite sampler installed, placed in service 10/13/20.

TABLE E-1 REMP SAMPLING EQUIPMENT OPERABILITY TRENDING SUSQUEHANNA STEAM ELECTRIC STATION Percent (%) Operability E-2

PLA-7928, Annual Radiological Environmental Operating Report

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