RBG-46806, Radiological Environmental Operating Report for 2007

Radiological Environmental Operating Report for 2007

ML081270048
Person / Time
Site:	River Bend
Issue date:	04/30/2008
From:	Lorfing D Entergy Operations
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
RBF1-08-0049, RBG-46806
Download: ML081270048 (46)

Text

Entergy Operations, Inc.

Eit Eterff-hy River Bend Station 5485 U.S. Highway 61 N St. Francisville, LA 70775 Tel 225 381 4157 Fax 225 635 5068 dlorfin@entergy.com David N. Lorfing Manager-Licensing April 30, 2008 U.S. Nuclear Regulatory Commission Document Control Desk 11555 Rockville Pike Rockville, MD 20852-2738

Subject:

Radiological Environmental Operating Report for 2007 River Bend Station - Unit 1 License No. NPF-47 Docket No. 50-458 File Nos.:. G9.5, G9.25.1.5 RBG-46806 RBF1-08-0049

Dear Sir or Madam,

Enclosed is the River Bend Station (RBS) Annual Radiological Environmental Operating Report for the period January 1, 2007, through December 31, 2007. This report is submitted in accordance with the RBS Technical Specifications, Section 5.6.2.

Should you have any questions regarding the enclosed information, please contact Mr. David Lorfing at (225) 381-4157.

Sincerely, David N. Lorfing DNL/wjf enclosure

Radiological Environmental Operating Report for 2007 RBG-46806 Page 2 of 2 cc: U.S. Nuclear Regulatory Commission (w/o Enclosure)

Region IV 611 Ryan Plaza Drive, Suite 400 Arlington, TX 76011 NRC Resident Inspector (w/o Enclosure)

PO Box 1050 St. Francisville, LA 70775 Mr. Jack Donohew, Project Manager (w/o Enclosure)

U.S. Nuclear Regulatory Commission MS O-8G14 11555 Rockville Pike Rockville, MD 20852-2738

RIVER BEND STATION ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT FOR 2007 Compiled By:

Victor A. Huffstatler Effluent & Environmental Monitoring Specialist Reviewed By:

/adford L. Houston Robert W. Heath Manager Radiation Protection Superintendent Chemistry Approved By:

Eric W. Olson General Manager Plant Operations

TABLE OF CONTENTS

SUMMARY

1

1.0 INTRODUCTION

6 1.1 Radiological Environmental Monitoring Program 6 1.2 Pathways Monitored 6 1.3 Land Use Census 6 2.0 INTERPRETATION AND TRENDS OF RESULTS 16 2.1 Air Particulate and Radioiodine Sample Results 16 2.2 Thermoluminescent Dosimetry Sample Results 16 2.3 Water Sample Results 17 2.4 Sediment Sample Results 17 2.5 Milk Sample Results 18 2.6 Fish and Invertebrate Sample Results 18 2.7 Food Products Sample Results 18 2.8 Land Use Census Results 18 2.9 Interlaboratory Comparison Results 18 3.0 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

21 3.1 2007 Program Results Summary 21 i

LIST OF TABLES TABLE 1.1 RADIOLOGICAL ENVIRONMENTAL SAMPLING PROGRAM 7 TABLE 2.1 LAND USE CENSUS RESULTS 19 TABLE 3.1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

22 ii

LIST OF FIGURES FIGURE 1-1 EXPOSURE PATHWAYS 13 FIGURE 1-2 SAMPLE COLLECTION SITES - NEAR FIELD 14 FIGURE 1-3 SAMPLE COLLECTION SITES - FAR FIELD 15 FIGURE 2-1 TLD INDICATOR RESULTS VERSUS CONTROL DATA 20 FIGURE 2-2 GROSS BETA INDICATOR RESULTS VERSUS CONTROL DATA 20 iii

LIST OF ATTACHMENTS ATTACHMENT 1 2007 RADIOLOGICAL MONITORING REPORT

SUMMARY

OF MONITORING RESULTS 26 iv

Summary The Annual Radiological Environmental Operating Report presents data obtained through analyses of environmental samples collected for the, River Bend Station (RBS)

Radiological Environmental Monitoring Program (REMP) for the period January 1, 2007 through December 31, 2007. This report fulfills a requirement specified in RBS Technical Requirements Manual (TRM) 5.6.2 as required by Technical Specification 5.6.2 of Appendix A to, RBS License Number NPF-47. During 2007, REMP results remained at background levels, as has been the case in previous years.

All required lower limit of detection (LLD) capabilities were achieved in all sample analyses during 2007. No measurable levels of radiation above baseline levels were detected in the vicinity of River Bend Station. The 2007 Radiological Environmental Monitoring Program thus substantiated the adequacy of source control and effluent monitoring at River Bend Station with no observed impact of plant operations on the environment.

Radiological Environmental Monitoring Program RBS established the REMP prior to the station's becoming operational (1985) to provide data on background radiation and radioactivity normally present in the area. RBS has continued to monitor the environment by sampling air, water, sediment, fish and food products, as well as measuring direct radiation. RBS also samples milk if milk-producing animals used for human consumption are present within five miles (8 km) of the plant.

The REMP includes sampling indicator and control locations within an approximately 20-mile radius of the plant. The REMP utilizes indicator locations near the site to show any increases or buildup of radioactivity that might occur due to station operation, and control locations farther away from the site to indicate the presence of only naturally occurring radioactivity. RBS personnel compare indicator results with control and preoperational results to assess any impact RBS operation might have had on the surrounding environment.

In 2007, environmental samples were collected for radiological analysis. The results of indicator locations were compared with control locations and previous studies. It was concluded that overall, no significant relationship exists between RBS operation and effect on the area around the plant. The review of 2007 data, in many cases, showed radioactivity levels in the environment were undetectable in many locations and near background levels in significant pathways.

Harmful Effects or Irreversible Damage The REMP monitoring did not detect any harmful effects or evidence of irreversible damage in 2007. Therefore; no analysis or planned course of action to alleviate problems was necessary.

1

Reporting Levels RBS's review indicates that no samples equaled or exceeded reporting levels for radioactivity concentration in environmental samples, as outlined in RBS Technical Requirements Manual Table 3.12.1-2, when averaged over any calendar quarter.

Therefore, 2007 results did not result in any Radiological Monitoring Program Special Reports.

/"

Radioactivity Not Attributable to RBS The RBS REMP detected no radioactivity attributable to other sources during year 2007.

Following the radioactive plume release due to reactor core degradation at the Chernobyl Nuclear Power Plant in 1986, RBS REMP detected 1-131 in water, vegetation, and air samples. 1-131 was also detected during 1998 in the wastewater treatment plant effluent. This was attributed to the medical treatment of a RBS employee. In 2006, Cs-137 was detected in upstream and downstream Mississippi River sediment samples.

This activity was not present in the 2007 samples.

Comparison to Federal and State Programs RBS personnel compared REMP data to federal and state monitoring programs as results became available. Historically, the programs used for comparison have included the U.S. Nuclear Regulatory Commission (NRC) TLD (Thermoluminescent Dosimeter)

Direct Radiation Monitoring Network and the Environmental Radiological Laboratory -

Department of Environmental Quality Laboratory Services Division (ERL-DEQLSD).

The NRC TLD Network Program was discontinued in 1998. Historically these results have compared to those from the RBS REMP. RBS TLD results continue to remain similar to the historical average and continue to verify that plant operation is not affecting the ambient radiation levels in the environment.

The ERL-DEQLSD and the RBS REMP entail similar radiological environmental monitoring program requirements. ' These programs include co-located air sample locations, and splitting or sharing sample media such as water, fish and food products.

Both programs have obtained similar results over previous years.

Sample Deviations

• Milk The REMP did not include milk sampling within five miles (8 kin) of RBS in 2007 due to unavailability of milk-producing animals used for human consumption. The RBS Technical- Requirements Manual requires collection of milk samples if available commercially within 8 km (5 miles) of the plant. RBS personnel collected vegetation samples to monitor the ingestion pathway, as specified in RBS Technical Requirements Manual Table 3.12.1-1, because of milk unavailability.

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• Required Lower Limit of Detection (LLD) Values All LLDs during this reporting period were more conservative than the acceptable limits required by the RBS Technical Requirement Manual (TRM).

• Sampling Deviations Listed below are sampling deviations that occurred during 2007. No LLD values were exceeded in the air sampling deviations. As described in footnote (a) to RBS Technical Requirements Manual Table 3.12.1-1, deviations are permitted from the required sampling schedule due to malfunction of equipment or other legitimate reasons.

Station Sampling Period Problem Comment Description AP1 06/18/07to 07/2/07 Power Outage Air sampler location AP1 was short 3.4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> (1 % volume) for period 06/18/07 to 07/2/07 due to the construction loop power outage at Grant Substation. Sampler operating normal at time of sample collection.

Sample volume adequate to achieve required LLD for 1-131 in analysis.

No program impacts accessed due to this loss of sample volume.

AN1 06/18/07 to 07/2/02 Equipment Air sampler location AN1 was found Failure not running. The sample run time was short 301.8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> for period 06/18/07 to 07/2/02 due to burnt power switch at sampler., Sample volume was adequate to, achieve required LLD for 1-131 in analysis.

No program impacts accessed due to this loss of sample volume.

AN1 07/02/07 to 07/16/07 Equipment Air sampler AN1 was found off with a Failure switch problem. The sampler was restarted and will be checked peridically until a new sampler can be calibrated and installed.

Approximately 18 hours2.083333e-4 days <br />0.005 hours <br />2.97619e-5 weeks <br />6.849e-6 months <br /> were missing.

TLD's 2na Quarter 2007 TLD Badges The 2nd quarter 2007 environmental Irradiated TLDs received from the TLD vendor were irradiated in transit. New TLDs are being shipped and will be swapped as soon as received.

TQ1 3rd Quarter 2007 TLD Badges Two TLD locations were swapped.

TRI Mislabled TLD TQ1 and TRi were relabeled to their location.

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TL1 2 n Quarter 2007 TLD Damaged TLD TL1 was found off of the telephone pole in the grass and removed from its protective plastic bag. The cause appears to be due to a vehicle sliding off the road and impacting the TLD holder. The TLD was rebagged and reinstalled with a new holder. The TLD may be damaged internally and the vendor will be notified to use care when reading the TLD.

AP1 07/30/07 to 08/13/07 Power Outage Air sampler location AP1 and ANI ANI were short 5.2 and 5.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br />, respectly for period 07/30/07 to 08/13/07 due to lost of the construction loop. Samplers were operating normal at time of sample collection. Sample volume adequate to achieve required LLD for 1-131 in analysis. No program impacts accessed due to this loss of sample volume AGC 08/27/07 to 09/10/07 Power Outage Air sampler locationAGC was short 3.6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> for period 08/27/07 to 09/10/07 due local thunderstorms.

Samplers were operating normal at time of sample collection. Sample volume adequate to achieve required LLD for 1-131 in analysis. No program impacts accessed due to this-loss of sample volume AGC 09/24/07 to 10/8/07 Timer Air sampler location AGC was found Disconnected with run timer unplugged/

disconnected for period 09/24/07 to 10/8/07. The wire seems to be too tight. The sampler was reconnected to run timer and ran normally.

Sampler operating normal at time of sample collection. This is admin issue only.

Missed Samples No samples were missed during 2007.

Unavailable Results Results of one TLD from the second quarter 2007 from location TL1 was unavailable due to damage to the TLD. This deviation is noted above.

4

Program Modifications RBS made no modifications to the REMP during the year 2007.

I Attachments contains results of air, TLD, water, sediment, fish, food products and special samples collected in 2007. TLDs were analyzed by AREVA. All remaining samples were analyzed by RBS Environmental Laboratory. Attachment 1 also contains RBS' participation in the Interlaboratory Comparison Program during the year 2007.

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1.0 Introduction 1.1 Radiological Environmental Monitoring Program RBS established the REMP to ensure that plant operating controls properly function to minimize any associated radiation endangerment to human health or the environment. The REMP is designed for:

" Analyzing important pathways for anticipated types and quantities of radionuclides released into the environment.

" Considering the possibility of a buildup of long-lived radionuclides in the environment and identifying physical and biological accumulations that may contribute to human exposures.

• Considering the potential radiation exposure to plant and animal life in the environment surrounding RBS.

" Correlating levels of radiation and radioactivity in the environment with radioactive releases from station operation.

1.2 Pathways Monitored The airborne, direct radiation, waterborne and ingestion pathways, -as seen in Figure 1-1, are monitored 'as required by the RBS Technical Requirements Manual 3.12.1. A description of the RBS REMP sample locations utilized to monitor exposure pathways are described in Table 1.1 and shown in Figures 1-2 and 1-3. RBS may occasionally supplement this program with additional sampling in order to provide a comprehensive and well-balanced program.

Section 2.0 of this report provides a discussion of 2007 sampling results with Section 3.0 providing a summary of results for the monitored exposure pathways.

1.3 Land Use Census RBS personnel conduct a land use census biannually, as required by RBS Technical Requirements Manual 3.12.2. The last land use census was performed in 2006. The next Land Use Census will be performed in 2008.

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Table 1.1 Radiological Environmental Sampling Program Exposure Requirement Sample Point Description, Sampling and Type and Frequency Pathway Distance and Direction Collection Frequency Of Analyses Airborne Radiolodine and Particulates 2 samples from close to the 2 SITE AN1 (0.9 km W) - RBS site Hwy 965; 0.4 Continuous sampler operation Radioiodine Canisters - 1-131 BOUNDARY locations, in different km south of Activity Center. with sample collection every analysis every two weeks.

sectors, of the highest calculated annual average ground level D/Q. API (0.9 km WNW) - Behind River Bend two weeks, or more frequently Station Activity Center. if required by dust loading. Air Particulate - Gross beta radioactivity analysis following filter change.

Radioiodine and Particulates V sample from the vicinity of a AQS2 (5.8 km NW) - St. Francis community having the highest Substation on US Hwy. (Bus.) 61 in St.

calculated annual average ground level Francisville.

D/Q.

Radioiodine and Particulates 1 sample from a control location, as for AGC (17.0 km SE) - Entergy Service example 15 - 30 km distance and in the Center compound in Zachary. (Control) least prevalent wind direction.

Direct TLDs Radiation One ring of stations, one in each Quarterly mR exposure quarterly.

meteorological sector in the general TA1 (1.7 km N) - River Bend Training area of the SITE BOUNDARY. Center.

TB1 (0.5 km NNE) - Utility pole near River Bend Station cooling tower yard area.

TC1 (1.7 km NE) - Telephone pole at Jct.

US Hwy. 61 and Old Highway 61.

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Table 1.1 Radiological Environmental Sampling Program Exposure Requirement Sample Point Description, Sampling and Type and Frequency Pathway Distance and Direction Collection Frequency Of Analyses Direct TLDs Radiation One ring of stations, one in each Quarterly mR exposure quarterly.

meteorological sector in the general TD1 (1.6 km ENE) - Stub pole along WF7, area of the SITE BOUNDARY. 150m S of Jct. WF7 and US Hwy. 61.

TEl (1.3 km E) - Stub pole along WF7, 1 km S of Jct. WF7 and US Hwy. 61.

TF1 (1.3 km ESE) - Stub pole along WF7, 1.6 km S of Jct. WF7 and US Hwy. 61.

TG1 (1.6 km SE) - Stub pole along WF7, 2 km S of Jct. WF7 and US Hwy. 61.

TH1 (1.7 km SSE) - Stub pole at power line crossing of WF7 (near Grants Bayou).

TJ1 (1.5 km S) - Stub pole near River Bend Station Gate #23 on Powell Station Road (LA Hwy. 965).

TK1 (0.9 km SSW) - Utility pole on Powell Station Road (LA Hwy. 965), 20 m S of River Bend Station River Access Road.

TL1 (1.0 km SW) - First utility pole on Powell Station Road (LA Hwy. 965) S of former Illinois Central Gulf RR crossing.

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Table 1.1 Radiological Environmental Sampling Program Exposure Requirement Sample Point Description, Sampling and Type and Frequency Pathway Distance and Direction Collection Frequency Of Analyses Direct TLDs Radiation One ring of stations, one in each TM1 (0.9 km WSW) - Third utility pole on Quarterly mR exposure quarterly.

meteorological sector in the general Powell Station Road (LA Hwy. 965) N of area of the SITE BOUNDARY. former Illinois Central Gulf RR crossing.

TN1 (0.9 km W) - Utility pole along Powell Station Road (LA Hwy. 965), near garden and AN1 air sampler location.

TP1 (0.9 km WNW) - Behind River Bend Station Activity Center at AP1 air sampler location.

TQ1 (0.6 km NW) - Across from MA-1 on RBS North Access Road.

TRI (0.8 km NNW) - River Bend Station North Access Road across from Main Plant entrance.

TLDs The balance of the stations (8) to be TAC (15.8 km N) - Utility pole at Jct. of US placed in special interest areas such Hwy. 61 and LA Hwy. 421, 7.9 km north of as population centers, nearby Bains. (Control) residences, schools, and in 1 or 2 areas to serve as control locations. TCS (12.3 km NE) - Utility pole at gate to East Louisiana State Hospital in Jackson.

(Special)

TEC (16.0 km E) - Stub pole at jct. of Hwy.

955 and Greenbrier Road, 4.8 km North of Jct.

of Hwys 955 and 964. (Control) 9

Table 1.1 Radiological Environmental Sampling Program Exposure Requirement Sample Point Description, Sampling and Type and Frequency Pathway Distance and Direction Collection Frequency Of Analyses Direct TLDs Radiation The balance of the stations (8) tosuchbe TGS (17.0 km SE) - Entergy Service Center Quarterly mR exposure quarterly.

placed in special interest areas compound in Zachary. (Special) as population centers, nearby residences, schools, and in 1 or 2 TNS (6.0 km W) - Utility pole with electrical areas to serve as control locations. meter at west bank ferry landing (LA Hwy. 10).

(Special)

TOS1 (4.0 km NW) - Utility pole front of Pentecostal church (opposite West Feliciana Parish Hospital) near Jct. US Hwy. 61 and Commerce Street. (Special)

TQS2 (5.8 km NW) - St. Francis Substation on business US Hwy. 61 in St. Francisville.

(Special)

TRS (9.2 km NNW) - Stub pole at Jct. of US Hwy. 61 and WF2 near Bains (West Feliciana High School). (Special)

Waterborne Surface Water 1 sample upstream and 1 sample SWU (5.0 km W) - Mississippi River about 4 Grab samples quarterly Gamma isotopic analysis ,and downstream. km upstream from the plant liquid discharge tritium analysis quarterly.

outfall, near LA Hwy. 10 ferry crossing.

SWD (7.75 km S) - Mississippi River about 4 km downstream from plant liquid discharge outfall, near paper mill.

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Table 1.1 Radiological Environmental Sampling Program Exposure Requirement Sample Point Description, Sampling and Type and Frequency Pathway Distance and Direction Collection Frequency Of Analyses Waterborne Groundwater Samples from 1 or 2 sources only if WU (-470 m NNE) - Upland Terrace Aquifer Semiannually Gamma isotopic and tritium likely to be affected. well upgradient from plant. analysis semiannually.

WD (-470 m SW) - Upland Terrace Aquifer well downgradient from plant.

Sediment From Shoreline 1 sample from downstream area with SEDD (7.75 km S) - Mississippi River about Annually Gamma isotopic analysis existing or potential recreational value. 4 km downstream from plant liquid discharge annually.

outfall, near paper mill.

Ingestion Milk If commercially available, 1 sample Currently, no available milking animals within Quarterly when animals are Gamma isotopic and 1-131 from milking animals within 8 km 8 km of RBS. on pasture. analysis quarterly when animals distant where doses are calculated to be greater than 1 mrem per year. are on pasture.

1 sample from milking animals at a control location 15 - 30 km distant when an indicator location exists.

Fish and Invertebrates 1 sample of a commercially and/or FD (7.75 km S) One sample of a Annually Gamma isotopic analysis on recreationally important species in commercially and/or recreationally important edible portions annually vicinity of plant discharge area. species from downstream area influenced by plant discharge.

1 sample of similar species in area not FU (4.0 km WSW) - One sample of a influenced by plant discharge. commercially and/or recreationally important species from upstream area not influenced by plant discharge.

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Table 1.1 Radiological Environmental Sampling Program Exposure Requirement Sample Point Description, Sampling and Type and Frequency Pathway Distance and Direction Collection Frequency Of Analyses Ingestion Food Products 1 sample of one type of broadleaf GN1 (0.9 km W) - Sampling will be Quarterly during the growing Gamma isotopic and 1-131 vegetation grown near the SITE performed in accordance with Table 3.12.1-1 season. analysis quarterly.

BOUNDARY location of highest Section 4.a of the Technical Requirements predicted annual average ground level Manual.

D/Q if milk sampling is not performed.

1 sample of similar broadleaf GOC (32.0 km NW) - One sample of similar vegetation grown 15 - 30 km distant, if vegetables from LA State Penitentiary at milk sampling is not performed. Angola. (Control) 12

FIGURE 1-1 EXPOSURE PATHWAYS

,LIQUID" EFFL UENTS lrrld~at~Ionl dia Trasport of kj ~ CCsupt tic" i ,, 13Q

FIGURE 1-2 SAMPLE COLLECTION SITES - NEAR FIELD 14

FIGURE 1-3 SAMPLE COLLECTION SITES-FAR FIELD I B / C (MtE) / (NE)

/

I /

I

/

.1

/

D

/ (ENE)

/

N E

(E)

F 1%

M I

N

/ ~- Saket

/

vý

/1 I G I 'SE, L . / t SW) /

• 1 K

/,

(SSW) Batin Ro~ve K-,

/ 4' Far. field Ridolokgkal I.

Environmental Monitoring Locations A_C Air Sampler Control AS Air Sampler Special T._ _ TLD Indicator T_C TLD Control L!

T.S_ Special TLIs 0 5 10 GQC Vegetation Control SWU Upstream Surface Water kilornsters SWD Downstream Surface Water SEDO Downstream Sediment ,

FU Upstream Fish/Invertebrates J FD Downstream Fish/Invertebrates (S) 15

2.0 Interpretation and Trends of Results 2.1 Air Particulate and Radioiodine Sample Results Iodine-131 was not detected in the radioiodine cartridges during 2007, as has been the case in previous years. Indicator gross beta air particulate results for 2007 were similar to preoperational and operational levels as seen below. Results are reported as annual average pCi/m 3 (picocuries per cubic meter).

Monitoring Period Result Preoperational 0.030 2007 0.024 2006 0.024 2005 0.022

,2004 0.018 2003 0.021 Table 3.1 provides a comparison of the indicator and control location mean values, which further emphasizes that the airborne pathway continues to remain at background levels.

Figure 2-2 also shows a comparison of indicator results from 2007 versus control location data from 1986 to 2006. Eleven indicator results for 2007 were out of the three-sigma levels. A review of the gross beta counter quality control data indicated no anomalies that would account for these readings. Also, a review of data from Grand Gulf and Waterford 3 showed elevated results over similar time frames indicating that the higher than normal indicator readings were due to atmospheric conditions.

2.2 Thermoluminescent Dosimetry Sample Results Gamma radiation exposure in the reporting period compares to previous years. Figure 2-1 compares quarterly indicator results for 2007 with control location data from 1986 to 2006. Six second quarter indicator results are above the upper control three-sigma limit.

The most probable cause is assumed to be due to irradiation during transit. Overall precision for 2007 appears to be lower than in previous years. This is attributed to TLD processing being performed by a different vendor than in the past.

RBS normalizes measured exposure to 90 days and relies on comparison of the indicator locations to the control as a measure of plant impact. RBS's comparison of the inner ring and special interest area TLD results to the controls, as seen in Table 3.1, indicates that the ambient radiation levels are unaffected by plant operations. Therefore, levels continue to remain at or near background.

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Results of one TLD from the second quarter 2007 from location TL1 was unavailable due to damage to the TLD. This deviation is noted the appropriate section above.

2.3 Water Sample Results Analytical results for 2007 surface water and groundwater samples were similar to those reported in previous years.

Surface water samples were collected from two locations (indicator and control) and analyzed for gamma radionuclides and tritium. Gamma radionuclides were below detectable limits at the indicator and control locations. Tritium was also below detectable limits at all locations. Listed below is a comparison of 2007 results from the indicator location as compared to the preoperational and previous operational years. Results are reported as annual average pCi/I (picocuries per liter).

Radionuclide 2007 2002 - 2006 Preoperational Gammas <LLD <LLD <LLD Tritium <LLD <LLD <LLD Groundwater samples were collected from two locations (indicator and control) and analyzed for gamma radionuclides and tritium. Gamma radionuclides and Tritium were below detectable limits at the indicator and control locations. Listed below is a comparison of 2007 results from the indicator location as compared to the preoperational and previous operational years. Results are reported as annual average pCi/l.

Radionuclide 2007 2002 - 2006 Preoperational Gammas <LLD <LLD <LLD Tritium <LLD <LLD <LLD Based on these comparisons, the operation of RBS had no impact on this pathway during 2007, and levels of radionuclides monitored for this pathway continue to remain similar to those obtained in operational and preoperational years.

2.4 Shoreline Sediment Sample Results A shoreline sediment sample was collected from the indicator location in -2007 and analyzed for gamma radionuclides. RBS also samples a non-REMP upstream control sediment sample. A review of historical indicator and upstream sediment samples periodically shows Cs-137. No Cs-137 was indicated on the samples in 2007.

Therefore, based on these measurements, RBS operations had no significant radiological impact upon the environment or public via this pathway.

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2.5 Milk Sample Results Milk samples were not collected during 2007 due to the- unavailability of indicator locations within 5 miles (8 kin) of RBS. Since there are no dairies within five miles of the RBS site, it is concluded RBS's operation had no impact on this pathway in 2007.

2.6 Fish and Invertebrate Sample Results Fish samples were collected from two locations (indicator and control) and analyzed for gamma radionuclides. In 2007, gamma radionuclides were below detectable limits, which is consistent with the preoperational and operational monitoring periods. Therefore, based on these measurements, RBS operations had no significant radiological impact upon the environment or public by this pathway.

2.7 Food Product Sample Results Food product samples were collected when available from two locations (indicator and control) in 2007 and analyzed for gamma radionuclides in accordance with Table TRM 3.12-1. The 2007 levels remained undetectable, which is consistent with previous operational years. Therefore, since levels continue to remain at background, it can be concluded that plant operations is not impacting this pathway.

2.8 Land Use Census Results The current land use census was conducted for the 2005-06 time period in accordance with RBS Technical Requirements Manual 3.12.2. No Land Use Census was performed in 2007. Table 2.1 contains data from the most recently completed Land Use Census.

2.9 Interlaboratory Comparison Results RBS' Environmental Laboratory analyzed interlaboratory comparison samples to fulfill the requirements of Technical Requirements Manual 3.12.3. Attachment 8.1 contains these results.

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Table 2-1 Land Use Census Results 2006 Item Sector Direction Nearest Range Nearest Range Residence (km) Milk (km)

Animal 1 A N 5498 Hwy. 61 1.8 -

2 B NNE 5435 Hwy. 61 1.6 -

3 C NE End of Old Hwy. 61' 1.4 -

4 D ENE 12657 Powell Station Road 1.4 -

5 E E 4635 Hwy. 612 2.5 -

6 F ESE 12010 Fairview Hill Trace Way, Star Subdivision 2.8 -

7 G SE 3379 Hwy. 96433 -3.

8 H SSE 11813 Powell Station Road 1.8 -

9* J S 11649 Powell Station Road 1.8 -

10 K SSW 8909 Hwy. 981 6.5 -

4 11 L SW _

4 12 M WSW -

13 N W 11101 Ferdinand Street 6.1 -

14 P' WNW 10426 Old Field Road 37-15 Q NW 9537 Hwy.965 1.3 -5 16 R NNW RicksHwy.Trailer 9656 Park 2.6 2.6 -

1. Address correction in Sector C; range remains at 1.4 km.

2. Use of GPS reveals resident at a range of 2.59 km in 2006 compared to 2.6 km in Sector E

3. New resident at a range of 3.7 km, compared to 4.0 km in 2004 census in sector G. GPS use shows this resident near sector line.

4. No resident found in sector L or M within 8 km. distance.

5. Incorrect address for sector Q, no change in distance

6. New resident at a range of 1.7 km, right on Q/R boundary inside Ricks Trailer Park. Use of GPS determined a couple of trailers are actually in sector R.

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FIGURE 2-1 TLD Indicator Results (2007) Versus Control Data (1986-2006) 22.00 20.00 18.00 A AI 14.00 + A

+

10.00 r

8.00 TA1 TB1 TCl TD1 TEl TF1 TG1 TH1 TJ1 TK1 TL1 TM1 TN1 TP1 TQ;1 TR1 TLD Locations

+ lstCtr.07 8 2ndtr 07. A 3rdXtr07 X 4th Otr 07 - Upper Control Linit - Lower Control Urnit FIGURE 2-2 Gross Beta Indicator Results (2007) Versus Control Data (1986-2006) 0.050 0.040 0.030

" 0.020 0.010 0.000 -0 01/01/07 02101/0703/01/07 04/01/07 05/01/07 06/01/07 07/01/07 08/01/07 09/01/07 10/01/07 11/01/07 12101/07 1 0 ANI I AP1 A AQS2 - UPPER'CONTROL - - LOWER CONTROL 20

3.0 Radiological Environmental Monitoring Program Summary 3.1 2007 Program Results Summary Table 3.1 summarizes the 2007 REMP results. RBSý personnel did not use values reported as less than the lower limit of detection (<LLD) when determining ranges and means for indicator and control locations.

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TABLE 3.1 Radiological Environmental Monitoring Program Summary Name of Facility: River Bend Station Docket No: 50-458 Location of Facility: West Feliciana Parish, Louisiana Reporting Period: January - December 2007 Sample Type Type & Number LLD a Indicator Locations Location with Highest Annual Mean Control Locations Number of (Units) of Analyses Mean (F) b Mean (F) b Nonroutine

[Range] [Range] Results d Mean (F) b Location c [ Range ]

Air Particulates Gross Beta 104 0.01 0.024 (78 / 78) ANI 0.026 ( 26 / 26) 0.023 ( 26 / 26) 0 (pCi/m3) [0.012- 0.041] (0.9 km W) [0.016 - 0.041] [0.013 - 0.038]

Airborne Iodine 1-131 104 0.07 <LLD N/A N/A <LLD 0 (pCi/m3)

Indicators TLDs Gammaý 64 (e) 14.56 ( 63 / 64) TB 1 17.22(4/4) N/A 0 (mR/Qtr) [11.25 - 17.22] (0.5 km NNE) [ 14.85 - 20.27]

Special Interest TLDs Gamma 24 (e) 15.44 ( 23 / 24 ) TGS 17.21 (4/4) N/A 0 (mR/Qtr) [13.75- 17.21 ] (17.0 km SE) [ 15.52- 19.60]

Control TLDs Gamma 8 (e) N/A N/A N/A 16.71 (8 / 8) 0 (mR/Qtr) [16.14- 17.28]

22

TABLE 3.1 Radiological Environmental Monitoring Program Summary Name of Facility: River Bend Station Docket No: 50-458 Location of Facility: West Feliciana Parish, Louisiana Reporting Period: January - December 2007 Sample Type Type & Number LLD a Indicator Location Location with Highest Annual Mean Control Locations Number of (Units) of Analyses Mean (F) b Mean (F) b Nonroutine

[Range] [Range] Results d Mean ( F) b Location c [Range ]

Surface Water H-3 8 3000 <LLD N/A N/A <LLD 0 (pCi/L)

Gamma 8 Mn-54 15 <LLD N/A N/A <LLD 0 Co-58 15 <LLD N/A N/A <LLD 0 Fe-59 30 <LLD N/A N/A <LLD 0 Co-60 15 <LLD N/A N/A <LLD 0 Zn-65 30 <LLD N/A N/A <LLD 0 Zr-95 30 <LLD N/A N/A <LLD 0 Nb-95 15 <LLD N/A N/A <LLD 0 1-131 15 <LLD N/A N/A <LLD 0 Cs- 134 15 <LLD N/A N/A <LLD 0 Cs- 137 18 <LLD N/A N/A <LLD 0 Ba- 140 60 <LLD N/A N/A <LLD 0 La- 140 15 <LLD N/A N/A <LLD 0

)

23

TABLE 3.1 Radiological Environmental Monitoring Program Summary Name of Facility: River Bend Station Docket No: 50-458 Location of Facility: West Feliciana Parish, Louisiana Reporting Period: January - December 2007 Sample Type Type & Number LLD a Indicator Locations Locationwith Highest Annual Mean Control Locations Number of (Units) of Analyses a Mean (F) b Mean (F) b Nonroutine

[Range] [ Range ] Results d Mean (F) b Location c [Range ]

Groundwater H-3 4 3000 <LLD N/A N/A <LLD 0

( pCi/L )

Gamma 4

Mn-54 15 <LLD N/A N/A <LLD 0 Co-58 15 <LLD N/A N/A <LLD 0 Fe-59 30 <LLD N/A N/A <LLD 0 Co-60 15 <LLD N/A N/A <LLD 0 Zn-65 30 <LLD N/A N/A <LLD 0 Zr-95 30 <LLD N/A N/A <LLD 0 Nb-95 15 <LLD N/A N/A <LLD 0 1-131 15 <LLD N/A N/A <LLD 0 Cs-134 15 <LLD N/A N/A <LLD 0 Cs-137 18 <LLD N/A N/A <LLD 0 Ba- 140 60 <LLD N/A N/A <LLD 0 La- 140 15 <LLD N/A N/A <LLD 0 Shoreline Sediment Gamma 2 (pCi/kg) Cs-134 150 <LLD N/A N/A <LLD 0 Cs- 137 180 <LLD N/A N/A <LLD 0 24

TABLE 3.1 Radiological Environmental Monitoring Program Summary Name of Facility: River Bend Station Docket No: 50-458 Location of Facility: West Feliciana Parish. Louisiana Reporting Period: January - December 2007 Sample Type Type &_Number LLD a Indicator Location Location with Highest Annual Mean Control Locations Number of (Units) of Analyses Mean (F) b Mean (F) b Nonroutine

[Range] [Range] Results d Mean ( F) b Location c [ Range ]

Fish Gamma 2 (pCi/kg) Mn-54 130 <LLD N/A N/A <LLD 0 Fe-59 260 <LLD N/A N/A <LLD 0 Co-58 130 <LLD N/A N/A <LLD 0 Co-60 130 <LLD N/A N/A <LLD 0 Zn-65 260 <LLD N/A N/A <LLD 0 Cs-134 130 <LLD N/A N/A <LLD 0 Cs- 137 150 <LLD N/A N/A <LLD 0 Food Products 1-131 8 60 <LLD N/A N/A <LLD 0 (pCi/kg)

Gamma 8 Cs- 134 60 <LLD N/A N/A <LLD 0 Cs-137 80 <LLD N/A N/A <LLD 0 a LLD = Required lower limit of detection based on RBS Technical Requirements Manual Table 3.12.1-3.

b Mean and range based upon detectable measurements only. Fraction of detectable measurements at specified locations is indicated in parenthesis (F).

c Locations are specified (1) by name and (2) direction and distance relative to reactor site.

d Non-routine results are those which exceed ten times the control station value. If no control station value is available, the result is considered non-routine if it exceeds ten times the preoperational value for the location.

e LLD is not defined in RBS Technical Requirements Manual Table 3.12.1-3.

f Control location for sediment is upstream surface water sample.

25

Attachment 1 2007 Radiological Monitoring Report Summary of Monitoring Results 26

TABLE OF CONTENTS ATTACHMENT 1.1 AIR SAMPLE LOCATION AN1 28 ATTACHMENT 1.2 AIR SAMPLE LOCATION AP1 29 ATTACHMENT 1.3 AIR SAMPLE LOCATION AQS2 30 ATTACHMENT 1.4 AIR SAMPLE LOCATION AGC 31 ATTACHMENT 2.1 THERMOLUMINESCENT DOSIMETERS 32 ATTACHMENT 3.1 SURFACE WATER 33 ATTACHMENT 4.1 GROUNDWATER 34 ATTACHMENT 5.1 SHORELINE SEDIMENT 35 ATTACHMENT 6.1 FOOD PRODUCTS 36 ATTACHMENT 7.1 FISH AND INVERTEBRATES 37 ATTACHMENT 8.1 INTERLABORATORY COMPARISON RESULTS 38 27

.1 Sample Type: Air Particulate and Charcoal Cartridge - Indicator Location AN1 Analysis: .Gross3Beta and Iodine Units: pCi/m LLD (pCi/m 3 ) 0.07 0.01 LAB ID START DATE END DATE 1-131 GROSS BETA 20070002 12/18/2006 1/2/2007 < 0.006 0.027 +/-0.0007 20070047 1/2/2007 1/15/2007 < 0.009 0.020 +/-0.0006 20070097 1/15/2007 1/29/2007 < 0.008 0.030 +/-0.0007 20070148 1/29/2007 2/12/2007 < 0.010 0.036 +/-0.0008 20070185 2/12/2007 2/26/2007 < 0.009 0.025 +/-0.0006 20070230 2/26/2007 3/12/2007 < 0.009 0.028 +/-0.0007 20070287 3/12/2007 3/26/2007 < 0.010 0.022 +/-0.0006 20070340 3/26/2007 4/9/2007 < 0.009 0.020 +/-0.0006 20070397 4/9/2007 4/23/2007 < 0.008 0.022 +/-0.0006 20070458 4/23/2007 5/8/2007 < 0.007 0.020 +/-0.0006 20070500 5/8/2007 5/21/2007 < 0.009 0.025 +/-0.0007 20070561 5/21/2007 6/5/2007 < 0.009 0.022 +/-0.0006 20070627 6/5/2007 6/18/2007 < 0.011 0.028 +/-0.0007 20070690 6/18/2007 7/2/2007 < 0.063 0.016 +/-0.0028 20070747 7/2/2007 7/16/2007 < 0.010 0.016 +/-0.0005 20070783 7/16/2007 7/30/2007 < 0.008 0.019 +/-0.0006 20070847 7/30/2007 8/13/2007 < 0.009 0.030 +/-0.0007 20070896 8/13/2007 8/27/2007 < 0.008 0.019 +/-0.0006 20070930 8/27/2007 9/10/2007 < 0.010. 0.020 +/-0.0006 20070982 9/10/2007 9/24/2007 < 0.011 0.025 +/-0.0007 20071079 9/24/2007 10/8/2007 < 0.011 0.028 +/-0.0007 20071124 10/8/2007 10/22/2007 < 0.011 0.024 +/-0.0007 20071186 10/22/2007 11/5/12007 < 0.009 0.037 +/-0.0008 20071229 11/5/2007 11/19/2007 < 0.011 0.041 +/-0.0009 20071263 11/19/2007 12/3/2007 < 0.009 0.035 +/-0.0008 20071318 12/3/2007 12/18/2007 < 0.009 0.031 +/-0.0007 Totals:

Average: 0.026 Maximum: 0.041 Minimum: 0.016 28

.2 Sample Type: Air Particulate and Charcoal Cartridge - Indicator Location AP1 Analysis: Gross3 Beta and Iodine Units: pCi/m LLD (pCi/m 3 ) 0.07 0.01 LAB ID ,START DATE END DATE 1-131 GROSS BETA 20070001 12/18/2006 1/2/2007 0.006 0.024 +/-0.0006 20070046 1/2/2007 1/15/2007 0.006 0.019 +/-0.0006 20070096 1/15/2007 1/29/2007 0.007 0.030 +/-0.0007 20070147 1/29/2007 2/12/2007 0.009 0.031 +/-0.0007 20070184 2/12/2007 2/26/2007 0.009 0:023 +/-0.0006 20070229 2/26/2007 3/12/2007 0.010 0.027 4/- 0.0007 20070286 3/12/2007 3/26/2007 0.007 0.021 +/-0.0006 20070339 3/26/2007 4/9/2007 0.009 0.018 +/-0.0006 20070396 4/9/2007 4/23/2007 0.008 0.021 +/-0.0006 20070457 4/23/2007 5/8/2007 0.009 0.018 +/-0.0005 20070499 5/8/2007 5/21/2007 0.008 0.024 +/-0.0007 20070560 5/21/2007 6/5/2007 0.010 0.020 +/-0.0006 20070626 6/5/2007 6/18/2007 0.009 0.022 +/-0.0007 20070689 6/18/2007 7/2/2007 0.009 0.021 +/-0.0006 20070746 7/2/2007 7/16/2007 0.008 0.014 +/-0.0005 20070782 7/16/2007 7/30/2007 0.008 0.017 +/-0.0005 20070846 7/30/2007 8/13/2007 0.011 0.012 +/-0.0005 20070895 8/13/2007 8/27/2007 0.008 0.017 +/-0.0005 20070929 8/27/2007 9/10/2007 0.010 0.017 +/-0.0005 20070981 9/10/2007 9/24/2007 0.009 0.018 +/-0.0006 20071078 9/24/2007 10/8/2007 0.009 0.023 +/-0.0006 20071123 10/8/2007 10/22/2007 < 0.010 0.023 +/-0.0007 20071185 10/22/2007 11/5/2007 < 0.011 0.032 +/-0.0008 20071228 11/5/2007 11/19/2007 < 0.008 0.033 +/-0.0008 20071262 11/19/2007 12/3/2007 < 0.009 0.029 +/-0.0007 20071317 12/3/2007 12/18/2007 < 0.010 0.029 +/-0.0007 Totals:

Average: 0.022 Maximum: 0.033 Minimum: 0.012 29

.3 Sample Type: Air Particulate and Charcoal Cartrid-ge - Indicator Location AQS2 Analysis: Gross3 Beta and Iodine Units: pCi/IM LLD (pCi/m 3 ) 0.07 0.01 LAB ID START DATE' END DATE 1-131 GROSS BETA 20070003 12/18/2006 1/2/2007 < 0.008 0.02 3 +/- 0.0006 20070048 1/2/2007 1/15/2007 < 0.007 0.01 9 +/- 0.0006 20070098 1/15/2007 1/29/2007 < 0.007 0.02 9 +/- 0.0007 20070149 1/29/2007 2/12/2007 < 0.008 0.03 3 +/- 0.0007 20070186 2/12/2007 2/26/2007 < 0.008 0.02.5 +/-0.0006 2007023f 2/26/2007 3/12/2007 < 0.008 0.02 8 +/-0.0006 20070288 3/12/2007 3/26/2007 < 0.007 0.01 9 +/- 0.0006 20070341 3/26/2007 4/9/2007 < 0.010 0.01 9 +/- 0.0006 20070398 4/9/2007 4/23/2007 < 0.007 0.02 1 +/- 0.0006 20070459 4/23/2007 5/8/2007 .< 0.009 0.02 0 +/-0.0005 20070501 5/8/2007 5/21/2007 < 0.010 0.02 3 +/- 0.0006 20070562 5/21/2007 6/5/2007 < 0.009 0.02'0 +/- 0.0006 20070628 6/5/2007 6/18/2007 < 0.009 0.02 3 +/-0.0007 20070691 6/18/2007 7/2/2007 < 0.009 0.02 0 +/- 0.0006 20070748 7/2/2007 7/16/2007 < 0.010 0.01.5 +/-0.0005 20070784 7/16/2007 7/30/2007 < 0.007 0.01 8 +/- 0.0005 20070848 7/30/2007 8/13/2007 <.0.009 0.02 8 +/- 0.0007 20070897 8/13/2007 8/27/2007 < 0.008 0.02 2 +/- 0.0006 20070931 8/27/2007 9/10/2007 < 0.009 0.02 1 +/- 0.0006 20070983 9/10/2007 9/24/2007 < 0.008 0.02 3 +/- 0.0006 20071080 9/24/2007 10/8/2007 < 0.008 0.02.4 +/- 0.0006 20071125 10/8/2007 10/22/2007 < 0.010 0.02.4 +/- 0.0006 20071187 10/22/2007 11/5/2007 < 0.007 0.03. 4 +/- 0.0007 20071230 11/5/2007 11/19/2007 < 0.006 0.03 8 +/-0.0008 20071264 11/19/2007 12/3/2007 < 0.008 0.03.4 +/-0.0008 20071319 12/3/2007 12/18/2007 < 0.008 0.02 8 +/- 0.0007 Totals:

Average: 0.024 Maximum: 0.038 Minimum: 0.015 30

.4 Sample Type: Air Particulate and Charcoal Cartridge - Control Location AGC Analysis: Gross 3Beta and Iodine Units: pCi/m 3

LLD (pCi/m ) 0.07 0.01 LAB ID START DATE END DATE 1-131 GROSS BETA 20070004 12/18/2006 1/2/2007 0.007 0.023 +/-0.0006 20070049 1/2/2007 1/15/2007 0.007 0.017 +/-0.0005 20070099 1/15/2007 1/29/2007 0.007 0.025 +/-0.0006 20070150 1/29/2007 2/12/2007 0.010 0.035 +/-0.0008 20070187 2/12/2007 2/26/2007 0.007 0.024 +/-0.0006 20070232 2/26/2007 3/12/2007 0.008 0.027 +/-0.0007 20070289 3/12/2007 3/26/2007 0.007 0.020 +/-0.0006 20070342 3/26/2007 4/9/2007 0.007 0.018 +/-0.0006 20070399 4/9/2007 4/23/2007 0.009 0.019 +/-0.0006 20070460 4/23/2007 5/8/2007 0.008 0.018 +/-0.0005 20070502 5/8/2007 5/21/2007 0.010 0.022 +/-0.0006 20070563 5/21/2007 6/5/2007 0.008 0.020 +/-0.0006 20070629 6/5/2007 6/18/2007 0.009 0.020 +/-0.0006 20070692 6/18/2007 7/2/2007 0.008 0.018 +/-0.0006 20070749 7/2/2007 7/16/2007 0.009 0.013 +/-0.0005 20070785 7/16/2007 7/30/2007 0.008 0.017 +/-0.0005 20070849 7/30/2007 8/13/2007 0.008 0.027 +/-0.0007 20070898 8/13/2007 8/27/2007 0.008 0.023 +/-0.0006 20070932 8/27/2007 9/10/2007 0.008 0.019 +/-0.0006 20070984 9/10/2007 9/24/2007 0.007 0.020 +/-0.0006 20071081 9/24/2007 10/8/2007 0.009 0.024 +/-0.0006 20071126 10/8/2007 10/22/2007 0.008 0.022 +/-0.0006 20071188 10/22/2007 11/5/2007 0.008 0.031 +/-0.0007 20071231 11/5/2007 11/19/2007 0.008 0.038 +/-0.0008 20071265 11/19/2007 12/3/2007 0.007 0.031 +/-0.0007 20071320 12/3/2007 12/18/2007 0.007 0.032 +/-0.0007 Totals:

Average: 0.023 Maximum: 0.038 Minimum: 0.013 31

.1 Sample Type: Thermoluminescent Dosimeters (TLD)

Analysis: mR Exposure Units: mR/Qtr INDICATORS 1ST QTR 2ND QTR 3RD QTR 4TH QTR MEAN TA1 11.01 15.75 11.92 10.50 12.30 TB1 16.53 20.27 17.22 14.85 17.22 TC1 15.80 20.07 16.03 14.91 16.70 TD1 15.26 20.19 17.43 14.86 16.93 TEl 14.59 18.51 16.03 13.86 15.75 TF1 13.53 17.38 15.19 12.71 14.70 TG1 15.74 19.46 17.38 15.94 17.13 TH1 12.78 16.23 13.63 12.05 13.67 TJ1 13.93 17.34 15.17 12.98 14.85 TK1 14.72 19.38 15.68 13.66 15.86 TL1 14.61 0.00 16.06 14.34 11.25 TM1 12.68 16.62 13.66 12.03 13.75 TN1 12.48 16.73 13.93 11.97 13.78 TP1 13.16 17.24 14.38 12.26 14.26 TQ1 11.10 15.80 12.47 10.43 12.45 TR1 11.53 15.48 11.77 10.52 12.33 MAX 16.53 20.27 17.43 15.94 17.22 AVG 13.71 16.65 14.87 12.99 14.56 MIN 11.01 0.00 11.77 10.43 11.25 SPECIAL INTEREST 1ST QTR 2ND QTR 3RD QTR 4TH QTR MEAN TCS 12.34 17.54 13.23 11.88 13.75 TGS 16.55 19.60 17.17 15.52 17.21 TNS 12.34 17.94 14.28 12.76 14.33 TRS 16.55 18.91 16.35 14.29 16.52 TOSl 12.34 19.85 16.64 14.99 15.95 TQS2 16.55 16.72 13.53 12.68 14.87 MAX 16.55 19.85 17.17 15.52 17.21 AVG 14.44 18.43 15.20 13.68 15.44 MIN 12.34 16.72 13.23 11.88 13.75 CONTROLS 1ST QTR 2ND QTR 3RD QTR 4TH QTR MEAN TAC 16.24 20.02 17.17 15.70 17.28 TEC 15.08 18.95 16.06 14.46 16.14 MAX 16.24 20.02 17.17 15.70 17.28 AVG 15.66 19.48 16.61 15.08 16.71 MIN 15.08 18.95 16.06 14.46 16.14 INDICATOR CONTROL SPECIAL MAX 20.27 20.02 19.85 AVG 14.56 16.71 15.44 MIN 0.00 1.4.46 11.88 32

.1 Sample Type: Surface Water Analysis: Gamma Isotopic and Tritium Units: pCi/l LLD (pCi/I) 15 15 30 15 30 15 30 15 15 18 60 15 LAB ID LOCATION DATE MN-54 C0-58 FE-59 CO-60 ZN-65 NB-95 ZR-95 1-131 CS-134 CS-137 BA-140 LA-140 20070032 SWU 1/10/2007 < 6.48 < 5.58 < 9.54 < 5.90 < 8.75 < 5.29 < 8.45 < 4.81 < 5.66 < 5.32 < 17.84 < 5.30 20070033 SWD 1/10/2007 < 4.67 < 5.25 < 8.13 < 4.51 < 12.25 < 2.63 < 7.50 < 5.21 < 5.46 < 5.26 < 16.61 < 4.91 20070375 SWU 4/12/2007 < 5.00 < 5.53 < 8.10 < 5.72 < 12.99 < 6.81 < 7.26 < 5.64 < 5.61 < 4.83 < 22.82 < 7.30 20070376 SWD 4/12/2007 < 5.95 < 3.97 < 9.50 < 5.22 < 8.54 < 6.32 < 9.36 < 5.64 < 6.00 < 3.47 <-20.40 < 7.81 20070727 SWU 7/10/2007 < 6.06 < 6.27 < 9.66 < 4.62 < 8.63 < 5.83 < 10.29 < 6.42 < 6.08 < 5.27 < 20.05 < 6.59 20070728 SWD 7/10/2007 < 5.15 < 5.27 < 7.54 < 4.83 < 12.39 < 6.46 < 9.74 < 5.75 < 5.93 < 5.77 < 16.57 < 5.55 20071099 SWU 10/11/2007 < 6.35 < 5.92 < 11.41 < 4.97 < 9.81 .< 5.30 < 10.55 < 4.99 < 6.05 < 5.64 < 19.24 < 8.51 20071101 SWD 10/11/2007 < 4.24 < 3.99 < 7.59 < 3.06 < 11.32 < 4.61 < 10.30 < 5.80 < 5.16 < 5.31 < 18.53 < 5.69 LLD (pCi/i) 3000 LAB ID LOCATION DATE TRITIUM 20070032 SWU 1/10/2007 < 552.12 20070033 SWD 1/10/2007 < 559.91 20070375 SWU 4/12/2007 < 529.66 20070376 SWD 4/12/2007 \ < 533.78 20070727 SWU 7/10/2007 < 554.43 20070728 SWD 7/10/2007 < 543.84 20071099 SWU 10/11/2007 < 514.00 20071101 SWD 10/11/2007 < 515.94 33

.1 Sample Type: Groundwater Analysis: Gamma Isotopic and Tritium Units: pCi/l LLD (pCi/I) 15 15 30 15 30 15 30 15 15 18 60 15 LAB ID LOCATION DATE MN-54 CO-58 FE-59 CO-60 ZN-65 NB-95 ZR-95 1-131 CS-134 CS-137 BA-140 LA- 140 20070596 GWU 6/13/2007 < 8.19 < 8.82 < 17.00 7.61 < 18.80 < 10.88 < 14.83 < 8.45 < 9.86 < 9.08 < 35.20 < 11.60 20070597 GWD 6/13/2007 < 8.77 < 8.60 < 15.77 7.58

• 18.54 < 13.02 < 10.41 < 8.55 < 9.53 < 7.91 < 27.42 < 12.42 20071303 GWD 12/12/2007 < 5.54 < 7.34

• 10.25 5.88 < 11.62 < 7.12 < 11.30 < 7.10 < 4.76 < 6.21 < 23.08 < 6.72 20071304 GWU 12/12/2007 < 4.98 < 6.16 < 11.74 8.10 < 11.30 < 9.83 < 8.50 < 6.77 < 7.32 < 5.63 < 20.71 < 7.47 LLD (pCi/I) 3000 LAB ID LOCATION DATE TRITIUM 20070596 GWU 6/13/2007 517 20070597 GWD 6/13/2007 524 20071303 GWD 12/12/2007 579 20071304 GWU 12/12/2007, 598 34

.1 Sample Type: Shoreline Sediment SEDD Analysis: Gamma Isotopic Units: pCi/kg, dry LLD (pCi/kg) 150 180 LAB ID DATE CS-134 CS-137 20070467 5/10/2007 < 25.98 < 21.03 Sample Type: Shoreline Sediment SEDU Analysis: Gamma Isotopic Units: pCi/kg, dry LLD (pCi/kg). 150 180 LAB ID DATE CS-134 CS-137 20070466 5/10/2007 < 20.22 < 15.90 j

35

.1 Sample Type: Food Products Analysis: Gamma Isotopic Units: pCi/kg, wet LLD(pCi/kg, we t) 60 60 80 LAB ID LOCATION DATE 1-131 CS-134 CS-137 20070050 GN1 1/23/2007 42.85 < 53.59 < 45.40 20070213 GQC 3/5/2007 33.40 < 43.53 < 26.13 20070405 GNI 4/24/2007 47.51 < 59.92 < 49.09 20070565 GQC 6/6/2007 58.32 < 51..51 < 40.50 20070765 GNI 7/24/2007 53.38 < 57.04 < 57.35 20070980 GQC 9/21/2007 37.10 < 31.9.0 < 35.80 20071151 GN1 10/30/2007 33.05 < 59.45 < 51.59 20071362 GQC 12/26/2007 32.80 < 40.81 <,31.91 36

.1 Sample Type: Fish Analysis: Gamma Isotopic Units: pCi/kg, wet LLD (pCi/kg) 130 130 260 130 260 130 150 LAB L( )CATION DATE MN-54 CO-58, FE-59 CO-60 ZN-65 CS-134 CS-137 20070912 ;ISHUP 8/30/2007 < 22.15 < 26.54 < 53.75 < 21.66 < 54.44 < 25.37 < 18.03 20070913 1ISHDO 8/30/2007 < 17.25 < 21.95 < 49.58 < 26.64 < 50.22 < 21.58 < 15.27 37

Attachment 8.1 Sample Type: Interlaboratory Comparison Analysis: Gross Beta, Iodine-131, Tritium, and Gamma Isotopic RIVER BEND STATION ENVIRONMENTAL (CROSS-CHECK) PROGRAM PARTICIPATION RESULTS Sample Type Analytics # Date Analysis Known RBS Value RBS N- RBS N-(units) Value(a) DEV(b) RANGE(C) 1-131Cartridge E5390-125 6/14/2007 1-131 7.91E+01 7.97E+01 0.13 0.01 Gross Beta Water E5389-125 6/14/2007 BETA 1,99E+02 2.25E+02 1.49 0.06 Gamma Water E5388-125 6/14/2007 Cr-51 4.11 E+02 4.20E+02 0.75 0.20 (pCi/liter) Mn-54 1.33E+02 1.48E+02 3.897F 0.04 Co-58 1.59E+02 1.64E+02 1.01 0.06 Fe-59 1.34E+02 1.45E+02 2.83 0.16 Co-60 1.91 E+02 1.95E+02 0.75 0.09 Zn-65 2.68E+02 2.82E+02 0.87 0.13 1-131 1.02E+02 1.02E+02 -0.02 0.16 Cs-134 1.94E+02 1.93E+02 -0.11 0.24.

Cs-137 1.35E+02 1.40E+02 1.21 0.32 Ce-141 1.60E+02 1.63E+02 0.57 0.38 Tritium Water E5467-125 9/13/2007 H-3 1.20E+04 1.11E+04 -1.26. 0.06 Gross Beta Filter E5468-125 9/13/2007 BETA 3.23E+01 2.81 E+01. -1.46 0.03 Gamma Filter E5469-125 9/13/07 Cr-51 1.25E+02 1.22E+02 -0.09 0.03 (pCi/filter) Mn-54 7.26E+01 7.82E+01 1.93 0.14 Co-58 4.94E+01 4.87E+01 -0.23 0.19 Fe-59 4.79E+01 5.17E+01 1.33 0.04 Co-60 6.41 E+01 6.48E+01 0.26 0.03 Zn-65 8.76E+01 9.96E+01 2.38 0.09 Cs-134 6.38E+01 6.12E+01 -0.89 0.08 Cs-137 5.65E+01 5.85E+01 0.69 0.11 Ce-141 9.14E+01 9.12E+01 -0.06 0.12 Gamma'Soil E5470-125 9/13/2007 Cr-51 3.91 E-01 3.83E-01 -0.07 0.03 (pCi/gram) Mn-54 2.27E-01 2.43E-01 0.24 0.01 Co-58 1.54E-01 1.38E-01 -0.36 0.04 Fe-59 1.49E-01 1.48E-01 -0.03 0.02 Co-60 2.OOE-01 1.94E-01 -0.11 0.01 Zn-65 2.73E-01 3.OOE-01 1.74 0.09 Cs-134 1.99E-01 2.03E-01 0.07 0.02 Cs-137 2.73E-01 2.99E-01 0.33 0.02 Ce-141 2.85E-01 2.81 E-01 -0.05 0.03 38

RIVER BEND STATION ENVIRONMENTAL (CROSS-CHECK) PROGRAM PARTICIPATION RESULTS Sample Type Analytics # Date Analysis Known RBS Value RBS N- RBS N-(units) Value(a) DEV(b) RANGE(c)

GammaMilk E5391-125 6/12/2007 Cr-51 5.12E+02 5.17E+02 0.12 0.06 (pCi/liter) Mn-54 1.66E+02 1.82E+02 1.14 0.11 Co-58 1.98E+02 2.02E+02 0.24 0.05 Fe-59 1.67E+02 1.85E+02 1.23 0.09 Co-60 2.38E+02 2.37E+02 -0.03 0.02 Zn-65 3.34E+02 3.72E+02 1.98 0.07 1-131 7.01 E+01 7.03E+01 0.05 0.20 2.42E+02 2.42E+02 0.02 0.07 Cs4134 Cs-137 1.69E+02 1.70E+02 0.06 0.03 Ce-141 2.OOE+02 2.03E+02 0.16 0.05 NOTES:

(a) The known value as determined by Analytics.

(b) The normalized deviation from the "known" value is computed from the deviation and the standard error of the mean;

+/-2.00 is the warning limit and +/-3.00 is the control limit. This is a measure of accuracy of theanalytical methods.

(c) The normalized range is computed from the mean range, the control limit, and the standard error of the range; +2.000 is the warning limit and +3.000 is the control limit. This is a measure of precision of the analytical methods.

(d) Results reported were outside Control Limits.

Exceptions:

There was one result outside the control limits for accuracy in the 2007 Interlaboratory Comparison program participation study performed as required by TRM 3.12.3. The RBS normalized-deviation for nuclide Mn-54 in a gamma isotopic water analysis, Analytics sample number E5388-125 of 6/14/2007, was +3.89, which is outside the control limit of +/-3.00 for accuracy. This high bias result is considered conservative and is considered as having no impact on past results of the program. The results for Mn-54 in all other program samples were within control limits for the year 2007; with normalized-deviations of 0.24 in sediment sample analysis; 1.93 in an air filter sample analysis; and 1.14 in a milk sample analysis. Reanalysis of the 2007 water sample produced results very similar to the originalaveraged result.

A review concerning the high bias was performed with no obvious issues associated with the counting of the water samples. Analytics was contacted concerning this result. A possible explanation offered from Analytics was that the effect of coincidence summing in calibration sources containing Y-88 and Co-60 may cause a lower efficiency for energies associated with Mn-54. The lower efficiency will result in a higher concentration for Mn-54. This phenomenon can sometimes also beseen with energies associated with Fe-59 and Zn-65.

There is no impact assessed on previously reported data due to these results. Environmental samples are analyzed and reported with a ninety-five percent confidence level. A known standard is counted with each group of samples and must read within 10 percent of the decay corrected activity. Ninety-eight percent of RBS environmental crosscheck results were within control limits for accuracy and 100% for precision during 2007.

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