Text

Annual Radiological Environmental Operating Report
	ML22126A102
Person / Time
Site:	Surry, 07200002, 07200055
Issue date:	04/25/2022
From:	Henderson J; Virginia Electric & Power Co (VEPCO)
To:	; Document Control Desk, Office of Nuclear Material Safety and Safeguards, Office of Nuclear Reactor Regulation
References
	22-125
	Download: ML22126A102 (76)
	v • d • e

VIRGINIA ELECTRIC AND POWER COMPANY RICHMOND, VIRGINIA 23261 April 25, 2022 United States Nuclear Regulatory Commission Serial No.22-125 Attention: Document Control Desk S&L/SCN RO Washington, DC 20555-0001 Docket Nos. 50-280 50-281 72-2 72-55 License Nos. DPR-32 DPR-37 SNM-2501 VIRGINIA ELECTRIC AND POWER COMPANY SURRY POWER STATION UNITS 1 AND 2 2021 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT Surry Units 1 and 2 Technical Specification 6.6.B.2 requires the submittal of an Annual Radiological Environmental Operating Report (AREOR) for Surry Power Station. Surry Independent Spent Fuel Storage Installation (ISFSI) Technical Specification Appendix C, Item 1.3.1 requires that the Surry ISFSI be included in the environmental monitoring for Surry Power Station. Accordingly, enclosed is the Surry Power Station AREOR for the period of January 1, 2021 through December 31, 2021, which includes environmental monitoring for the Surry ISFSI.

If you have any further question*s, please contact William Terry at 757-365-2010.

Sincerely, Johnny Henderson Director Safety & Licensing Surry Power Station 7£25 Attachment

Jfj5S Z(p Commitments made in this letter: None /V1<R JJf-JS5

Serial No.22-125 Docket Nos.: 50-280 50-281 72-2 72-55 cc: U. S. Nuclear Regulatory Commission Region II Marquis One Tower 245 Peachtree Center Ave., NE Suite 1200 Atlanta, Georgia 30303-1257 Director, Nuclear Material Safety and Safeguards U. S. Nuclear Regulatory Commission Washington, D. C. 20555-0001 NRG Senior Resident Inspector Surry Power Station Director, Virginia Health Department Division of Radiological Health 109 Governor Street, Room 730 Richmond, Virginia 23219

Serial No.22-125 Docket Nos.: 50-280 50-281 72-2 72-55 ATTACHMENT 1 2021 Annual Radiological Environmental Operating Report SURRY POWER STATION UNITS 1 AND 2 VIRGINIA ELECTRIC AND POWER COMPANY

2021 Annual Radiological Environmental Operating Report Surry Power Station

~ Dominion

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Energy

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I Dominion Energy I Surry Power Station Radiological Environmental Monitoring Program I January 1, 2021 to December 31, 2021 I

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I I Annual Radiological Environmental Operating Report I Surry Power Station January 1, 2021 to December 31, 2021 I

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I J. W. Abbott, Jr.

Health Physicist I -*~____.;;:~~Sc----n--'-=--'~~---

I Reviewed by:

v R.Schau Supervisor Radiological Analysis I Reviewed by:

J. R. Hopkins I perintendent Health Physics Technical Services I Approved by:

I Manager Radiological Protection and Chemistry I

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Table of Contents I

I PREFACE .............................................................................................................................4

1. EXECUTIVE

SUMMARY

..................................................................................................5

2. PROGRAM DESCRIPTION .............................................................................................7 I 2.1 Introduction .............................................................................................................7 2.2 Sampling and Analysis Program .............................................................................8

3. ANALYTICAL RES ULTS ................................................................................................20 I 3.1 Summary of Results ..............................................................................................~O 3.2 Analytical Results of 2021 REMP Samples ........................................................... 27

4. DISCUSSION OF RES ULTS .......................................................................................49 I 4.1 Gamma Exposure Rate .........................................................................................50 4.2 Airborne Gross Beta .............................................................................................. 50 4.3 Airborne Radioiodine ............................................................................................. 52 I 4.4 Air Particulate Gamma ..........................................................................................52 4.5 Animal Milk ............................................................................................................52 4.6 Food Products .......................................................................................................53 I 4.7 Well Water .............................................................................................................53 4.8 River Water ...........................................................................................................53 4.9 Silt .........................................................................................................................54 I 4.10 Shoreline Sediment ............................................................................................. 56 4.11 Fish .....................................................................................................................56 4.12 Oysters ................................................................................................................56 I 4.13 Clams ..................................................................................................................56 4.14 Crabs ..................................................................................................................56

5. PROGRAM EXCEPTIONS ............................................................................................. 57 I 6. CONCLUSIONS .............................................................................................................58 REFERENCES ....................................................................................................................60 APPENDICES .....................................................................................................................62 APPENDIX A: LAND USE CENSUS .............................................................................. 63 I APPENDIX B:

SUMMARY

OF INTERLABORATORY COMPARISONS ........................ 65 I

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I I PREFACE I This report is submitted as required by Technical Specification 6.6.B.2, Annual Radiological Environment Operating Report, for Surry, Units 1 and 2, Virginia Electric and Power Company Docket Nos. 50-280 and 50-281, and the Surry Independent Spent Fuel Storage I Installation (ISFSI) Technical Specifications, Appendix C, Item 1.3.1.

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I I 1. EXECUTIVE

SUMMARY

I This document is a detailed report of the 2021 Surry Power Station Radiological Environmental Monitoring Program (REMP). Radioactivity levels from January 1 through December 31, 2021, in air, water, silt, shoreline sediment, milk, aquatic biota, food products I and direct exposure pathways have been analyzed, evaluated, and summarized. The REMP is designed to confirm that radiological effluent releases are As Low As (is) Reasonably I Achievable (ALARA), no undue environmental effects occur, and the health and safety of the public are protected. The program also detects any unexpected environmental processes that could allow radiation accumulations in the environment or food pathway chains.

I Radiation and radioactivity in the environment are monitored within a 20-mile radius of the station. Surry Power Station personnel collect a variety of samples within this area.

I Several sampling locations for each medium are selected using available meteo.rological, land use, and water use data. Two types of samples are obtained. The first type, control I samples, is collected from areas that are beyond the measurable influence of Surry Power Station or any other nuclear facility. These samples represent normal background radiation levels. Background radiation levels can be compared to the environment I surrounding the station. Indicator samples are the second sample type obtained. These samples show how much radiation is contributed to the environment by the station.

Indicator samples are taken from areas close to the station where any contribution from I station operations will be at the highest concentration.

I Prior to station operation, samples were collected and analyzed to determine the amount of radioactivity present in the area. The resulting values are used as a "pre-operational .

baseline." Analysis results from the indicator samples are compared to control sample values I and the pre~operational baseline to determine if changes in radioactivity levels are attributable to station operations, or natural variation, or other causes such as the Chernobyl and Fukushima Daiichi accidents that released radioactive material to the I environment.

I Teledyne Brown Engineering, Inc. (TBE) provides radioanalyses for this program and Mirian Technologies provides thermoluminescent dosimetry (TLD) services.

Participation in an lnterlaboratory Comparison Program provides an independent check of sample measurement precision and accuracy. Typically, radioactivity levels in the environment are so low that analysis values frequently fall below the minimum detection limits of state-of-the-art measurement methods. Because of this, the United States Nuclear Regulatory Commission (USNRC) requires that equipment used . for radiological environmental monitoring must be able to detect specified I minimum Lower Limits of Detection (LLDs). This ensures that analyses are as accurate as possible. The USNRC also mandates a reporting level for radionuclides. Licensed nuclear facilities must report the radionuclide activities in those environmental samples that are I equal to or greater than the specified reporting level. Environmental radiation levels are sometimes referred to as a percent of the reporting level.

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I I Analytical results are reported for all possible radiation exposure pathways to man. These pathways include airborne, aquatic, terrestrial and direct radiation exposure. The airborne I exposure pathway includes radioactive airborne iodine and particulates. The 2021 airborne results were comparable to previous years. No station related radioactivity was detected and natural radioactivity levels remained at levels consistent with past years' results. Aquatic I exposure pathway samples include well and river water, silt and shoreline sediments, crabs, fish, clams, and oysters. Naturally occurring radionuclides such as beryllium-?, potassium-I 40, radium-226, actinium-228, thorium-228, and thorium-232 were detected at average environmental levels. No man-made radionuclides were detected in well water. This trend is consistent throughout the operational environmental monitoring program. No man-made I radionuclides were detected in river water. Silt samples indicated the presence of cesium-137 and naturally occurring radionuclides. Cesium-137 concentrations were present in indicator location samples at nominal background levels. No other man-made radionuclides I were detected. These background levels are attributable to fallout from historic weapons testing and nuclear accidents such as Chernobyl. Naturally occurring beryllium-?, potassium-I 40, radium-226, actinium-228, thorium-228, and thorium-232 were detected at average environmental levels. Shoreline sediment, which may provide a direct exposure pathway, contained no station related radionuclides. Naturally occurring radionuclides potassium-40, I thorium-228, and thorium-232 were detected at average environmental levels. The terrestrial exposure pathway includes milk and food products .. lodine-131 was not detected in any 2021 milk samples and has not been detected in milk prior to or since I the 1986 Chernobyl accident. Strontium-90 was detected in milk and this activity is attributable to past atmospheric nuclear weapons testing. No other man-made radionuclides were detected in milk samples. Consistent with historical data, naturally occurring potassium-40 was detected in milk. No man-made radionuclides were detected in food product samples. Naturally occurring potassium-40 was detected in food product I samples. The direct exposure pathway measures environmental radiation dose using TLDs.

TLD results have remained relatively constant over the years.

I During 2021, as in previous years, the operation of Surry Power Station has created no adverse environmental effects or health hazards. The maximum total body dose calculated I for a hypothetical individual at the station site boundary due to liquid and gaseous effluents released from the station during 2021 was 0.038 millirem. For reference, this dose may be compared to the 620 millirem average annual exposure to every person in the United States I from natural and man-made sources. Natural sources in the environment provide approximately 50% of radiation exposure to man, while nuclear power contributes less than 0.1 %. These results demonstrate compliance with federal and state regulations and I demonstrate the adequacy of radioactive effluent controls at Surry Power Station.

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I Surry Nuclear Power Station Surry County, Virginia Annual Radiological Environmental Operating Report 2021 I 2. PROGRAM DESCRIPTION I 2. 1 Introduction

1 This report documents the 2021 Surry Power Station Operational Radiological Environmental Monitoring Program (REMP). Dominion Energy's Surry Power Station is located on the Gravel Neck peninsula adjacent to the James River, approximately 25 miles I upstream of the Chesapeake Bay. The site consists of two units, each with a pressurized water reactor (PWR) nuclear steam supply system and turbine generator furnished by Westinghouse Electric Corporation. Each unit was designed with a nominal gross electrical I output of 910 megawatts electric (MWe). Unit 1 achieved commercial operation on December 22, 1972, and Unit 2 on May 1, 1973.

I The United States Nuclear Regulatory Commission regulations (1 0CFR50.34a) require that nuclear power plants be designed, constructed, and operated to keep levels of radioactive I material in effluents to unrestricted areas As Low As (is) Reasonably Achievable. To ensure these criteria are met, the operating license for Surry Power Station includes Technical Specifications that address the release of radioactive effluents. In-plant monitoring is used to ensure that these release limits are not exceeded. As a precaution against unexpected or undefined environmental processes, which might allow undue accumulation of radioactivity in the environment, a program for monitoring the station environs is also included in Surry Power Station Technical Specifications.

I Dominion personnel are responsible for collecting the various indicator and control environmental samples. Mirian Technologies is responsible for processing the TLDs.

Teledyne Brown Engineering is responsible for sample analyses. The results of the analyses I are used to determine if changes in radioactivity levels may be attributable to station operations. Measured values are compared with control values, which vary with time due to external events, such as cosmic ray bombardment, nuclear weapons test fallout I and seasonal variations of naturally occurring radionuclides. Data collected prior to station operation is used to indicate the degree of natural variation to be expected.

I This pre-operational data is compared with data collected during the operational phase to assist in evaluating any radiological impact of station operation.

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I Surry Nuclear Power Station Surry County, Virginia Annual Radiological Environmental Operating Report 2021 I Occasionally, samples of environmental media may show the presence of man-made radionuclides. As a method of referencing the measured radionuclide concentrations in the I sample media to a dose consequence to man, the data is compared to the reporting level concentrations listed in the USNRC Regulatory Guide 4.8, "Environmental Technical Specifications for Nuclear Power Plants", (December, 1975) ahd VPAP-2103S, Offsite Dose I Calculation Manual (Surry). These concentrations are based upon the annual dose commitment recommended by 10CFR50, Appendix I, to meet the criterion of "As Low As (is)

I Reasonably Achievable."

This report documents the results of the REMP for 2021 and satisfies the following objectives I of the program:

To provide measurements of radiation and of radioactive materials in those exposure I pathways and for those radionuclides that lead to the highest potential radiation exposure of the maximum exposed member of the public resulting from station I operations.

To supplement the radiological effluent monitoring program by verifying radioactive I effluents are within allowable limits.

To identify changes in radioactivity in the environment.

I To verify that station operations have no detrimental effect on the health and safety of I the public.

I 2.2 Sampling and Analysis Program Table 2-1 summarizes the 2021 sampling program for Surry Power Station. All samples listed I in Table 2-1 are taken at indicator locations except those labeled "control location." Dominion Energy personnel collect all samples listed in Table 2-1.

I Table 2-2 summarizes the analysis program conducted by Teledyne Brown Engineering and Mirian Technologies for Surry Power Station. All samples, except for TLDs, are shipped to I Teledyne Brown Engineering, located in Knoxville, TN, for analysis. The TLDs are shipped to Mirian Technologies, located in Irvine, CA, for processing.

I The Surry Radiological Monitoring Locations map (Figures 1 - 5) denote sample locations for Surry Power Station. The locations are color coded to designate sample types.

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Surry Nuclear Power Station Surry County, Virginia Table 2-1 Annual Radiological Environmental Operating Report 2021 SURRY- 2021 RADIOLOGICAL SAMPLING STATIONS DISTANCE AND DIRECTION FROM UNIT NO. 1 P . 1 of 3 Distance Collection Sam~le Media Location Station Miles Direction Degrees Freguenc:t Remarks Environmental Control (00) Quarterly Onsite (Stored in lead shield outside the protected area)

TLDs West North West (02) 0.2 WNW 293° Quarterly Site Boundary Surry Station Discharge (03) 0.4 NW 321° Quarterly Site Boundary North North West (04) 0.2 NNW 329° Quarterly Site Boundary North (05) 0.3 N 40 Quarterly Site Boundary North North East (06) 0.3 NNE 28° Quarterly Site Boundary North East (07) 0.3 NE 44° Quarterly Site Boundary East North East (08) 0.4 ENE 67° Quarterly Site Boundary East (09) 0.3 E 89° Quarterly Site Boundary West (10) 0.1 w 271° Quarterly Site Boundary West South West (11) 0.4 WSW 252° Quarterly Site Boundary South West (12) 0.3 SW 228° Quarterly Site Boundary South South West (13) 0.3 SSW 201° Quarterly Site Boundary South (14) 0.4 s 182° Quarterly Site Boundary South South East (15) 0.6 SSE 157° Quarterly Site Boundary South East (16) 0.9 SE 135° Quarterly Site Boundary Station Intake (18) 1.6 ESE 115° Quarterly Site Boundary Hog Island Reserve (19) 2.0 NNE 26° Quarterly Near Resident Bacon's Castle (20) 4.5 SSW 202° Quarterly Apx. 5 miles Route 633 (21) 4.9 SW 227° Quarterly Apx. 5 miles Alliance (22) 5.1 WSW 247° Quarterly Apx. 5 miles Surry (23) 7.7 WSW 256° Quarterly Population Center Route 636 and 637 (24) 4.0 w 270° Quarterly Apx. 5 miles Scotland Wharf (25) 5.0 WNW 284° Quarterly Apx. 5 miles Jamestown (26) 6.3 NW 308° Quarterly Apx. 5 miles Colonial Parkway (27) 3.8 NNW 333° Quarterly Apx. 5 miles Route 617 and 618 (28) 4.9 NNW 340° Quarterly Apx. 5 miles Kingsmill (29) 4.6 N 20 Quarterly Apx. 5 miles Williamsburg (30) 7.8 N 00 Quarterly Population Center Kingsmill North (31) 5.5 NNE 12° Quarterly Apx. 5 miles Budweiser (32) 5.8 NNE 27° Quarterly Population Center Water Plant (33) 5.0 NE 46° Quarterly Apx. 5 miles 9

Surry Nuclear Power Station Surry County, Virginia Annual Radiological Environmental Operating Report 2021 Table 2-1 SURRY- 2021 RADIOLOGICAL SAMPLING STATIONS DISTANCE AND DIRECTION FROM UNIT NO. 1 P . 2 of3 Distanc e Collection Sample Media Location Station Miles Direction Degrees Frequency Remarks Environmental BASF (34) 5.1 ENE 70° Quarterly Apx. 5 miles TLDs Lee Hall (35) 7.1 ENE 75° Quarterly Population Center Goose Island (36) 5.1 E goo Quarterly Apx. 5 miles Fort Eustis (37) 4.9 ESE 104° Quarterly Apx. 5 miles Newport News (38) 19.3 SE 130° Quarterly Population Center James River Bridge (39) 17.1 SE 142° Quarterly Control Location Benn's Church (40) 17.0 SSE 159° Quarterly Control Location Smithfield (41) 13.4 SSE 167° Quarterly Control Location Rushmere (42) 5.3 SSE 156° Quarterly Apx. 5 miles Route 628 (43) 5.1 s 177° Quarterly Apx. 5 miles Air Charcoal Surry Station (SS) 0.3 NNE 18° Weekly Site boundary location with highest D/Q and Particulate Hog Island Reserve (HIR) 2.0 NNE 26° Weekly Bacon's Castle (BC) 4.5 SSW 202° Weekly Alliance (ALL) 5.1 WSW 247° Weekly Colonial Parkway (CP) 3.8 NNW 333° Weekly BASF (BASF) 5.1 ENE 70° Weekly Fort Eustis (FE) 4.9 ESE 104° Weekly Newport News (NN) 19.3 SE 130° Weekly Control Location River Water Surry Station Discharge (SD) 0.4 NW 323° Monthly Scotland Wharf (SW) 4.9 WNW 284° Monthly Control Location Well Water Surry Station (SS) 0.1 SW 227° Quarterly Onsite Hog Island Reserve (HIR) 2.0 NNE 28° Quarterly Construction Site (CS) 0.3 E 87° Quarterly Shoreline Hog Island Reserve (HIR) 0.6 N 7° Semi-Annually Sediment Chickahominy River (CHIC) 11.2 WNW 301° Semi-Annually Control Location Silt Chickahominy River (CHIC) 11.2 WNW 300° Semi-Annually Control Location Surry Station Discharge (SD) 0.5 NW 315° Semi-Annually Surry Station Intake (SI) 1.8 ESE 112° Semi-Annually 10

Surry Nuclear Power Station Surry County, Virginia Annual Radiological Environmental Operating Report 2021 Table 2-1 SURRY-2021 RADIOLOGICAL SAMPLING STATIONS DISTANCE AND DIRECTION FROM UNIT NO. 1 P . 3 of 3 Distance Collection Sample Media Location Station Miles Direction Degrees Frequency Remarks Milk Colonial Parkway (CP) 3.7 NNW 336° Monthly Beachy Farm (BF) 12.0 SW 220° Monthly Control Location Epps (EPPS) 4.8 SSW 200° Monthly Oysters Point of Shoals (POS) 6.4 SSE 157° Semi-Annually Mulberry Point (MP) 4.9 ESE 124° Semi-Annually Swash Hole Island (SHI) 6.8 SE 128° Semi-Annually Clams Chickahominy River (CHIC) 11.2 WNW 300° Semi-Annually Control Location Surry Station Discharge (SD) 1.3 NNW 341° Semi-Annually Jamestown Island (JI) 3.9 NW 324° Semi-Annually Fish Surry Station Discharge (SD) 1.3 NNW 341° Semi-Annually Crabs Surry Station Discharge (SD) 1.3 NNW 341° Annually Crops Brock's Farm (BROCK) 3.8 s 183° Annually (Corn, Peanuts, Slade's Farm (SLADE) 3.2 s 179° Annually Soybeans) 11

I Surry Nuclear Power Station Surry County, Virginia Annual Radiological Environmental Operating Report 2021 I Table 2-2 SURRY - 2021 SAMPLE ANALYSIS PROGRAM I SAMPLE MEDIA FREQUENCY ANALYSIS P .1 of3 LLD*

REPORT UNITS mR/Std.

I Thermoluminescent Dosimetry (TLD}

Quarterly Gamma Dose 6 Quarter Air Iodine Weekly 1-131 0.07 pCi/m 3 I Air Particulate Weekly Gross Beta Gamma 0.01 pCi/m 3 Quarterly (a) Isotopic pCi/m 3 Cs-134 0.05 Cs-137 0.06 River Water Quarterly Tritium (H-3) 2000 pCi/L I Composite of monthly sample Monthly 1-131 10 pCi/L I Gamma Isotopic Mn-54 15 pCi/L Fe-59 30 I Co-58 Co-60 Zn-65 15 15 30 Zr-95 30 I Nb-95 Cs-134 Cs-137 15 15 18 Ba-140 60 I Well Water Quarterly La-140 Tritium (H-3) 1-131 15 2000 1

pCi/L I Gamma Isotopic Mn-54 15 pCi/L Fe-59 30 I Co-58 Co-60 Zn-65 15 15 30 Zr-95 30 I Nb-95 Cs-134 Cs-137 15 15 18 Ba-140 60 I La-140 15 Footnotes located at end of table.

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I Surry Nuclear Power Station Surry County, Virginia Annual Radiological Environmental Operating Report 2021 Table 2-2 I SURRY-2021 SAMPLE ANALYSIS PROGRAM P . 2 of3 I SAMPLE MEDIA Shoreline Sediment FREQUENCY Semi-Annually ANALYSIS Gamma Isotopic Cs-134 LLD*

150 REPORT UNITS pCi/kg - dry Cs-137 180 I

Silt Semi-Annually Gamma Isotopic Cs-134 Cs-137 150 180 pCi/kg - dry Milk Monthly 1-131 1 pCi/L I Gamma Isotopic Cs-134 15 pCi/L Cs-137 18 I Ba-140 La-140 60 15 Quarterly Sr-89 NA pCi/L I Composite of CP monthly sample Sr-90 NA I

i Oysters Semi-Annually Gamma Isotopic pCi/kg -wet Mn-54 130 Fe-59 260 Co-58 130 I Co-60 Zn-65 130 260 Cs-134 130 I Clams Semi-Annually Cs-137 Gamma Isotopic 150 pCi/kg -wet Mn-54 130 I Fe-59 Co-58 260 130 Co-60 130 I Zn-65 Cs-134 Cs-137 260 130 150 I Crabs Annually Gamma Isotopic Mn-54 130 pCi/kg -wet Fe-59 260 I Co-58 Co-60 Zn-65 130 130 260 Cs-134 130 I Cs-137 150 I Footnotes located at end of table.

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I Surry Nuclear Power Station Surry County, Virginia Annual Radiological Environmental Operating Report 2021 Table 2-2 I SURRY-2021 SAMPLE ANALYSIS PROGRAM P . 3 of 3 I SAMPLE MEDIA Fish FREQUENCY Semi-Annually ANALYSIS Gamma Isotopic LLD* REPORT UNITS pCi/kg -wet Mn-54 130 I Fe-59 Co-58 Co-60 260 130 130 I Zn-65 Cs-134 Cs-137 260 130 150 I Food Products Annually Gamma Isotopic 1-131 60 pCi/kg - wet Cs-134 60 I Cs-137 80 I

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Note: This table is not a complete listing of nuclides that can be detected and reported. Other I peaks that are measurable and identifiable, together with the above nuclides, are also identified and reported.

LLD is the Lower Limit of Detection as defined and required in the USNRC Branch Technical I Position on an Acceptable Radiological Environmental Monitoring Program, Revision 1, November 1979.

LLDs indicate those concentrations to which environmental samples.are required to be analyzed.

Actual analysis of samples may be lower than these listed values.

I (a) Quarterly composites of each location's weekly air particulate samples are analyzed for gamma emitters. NA None assigned.

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3. ANALYTICAL RESULTS I 3.1 Summary of Results I In accordance with the Surry Offsite Dose Calculation Manual (ODCM), a summary table of the analytical results has been prepared and is presented in Table 3-1. This data is presented in accordance with the format of the USNRC Branch Technical Position, "Acceptable I Radiological Environmental Monitoring Program", Revision 1, November 1979. A more detailed analysis of the data is provided in Section 4.

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I Surry Nuclear Power Station Surry County, Virginia Annu al Radiological Environmental Operating Report 2021 I TABLE 3-1: RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

SURRY NUCLEAR POWER STATION Docket No. 50-280-281 I Medium or Analysis Total LLD Indicator Locations Location with Highest M ean Control Locations Number of Nonroutine Reported Pathway Sampled Type Number Mean Distance Mean Mean I I I (Units) (Range) Number Direction (Range) (Range) Measurements Direct Gamma 164 2 16.5 (1521152) STA-9 0.3mi 22 .5 (414) 17.2 (12/12) 0 Radiation Dose (10.9-23.4) E (20 .6-23.4) (14.0-21.8)

TLD (mR/Std. Quarter)

I Air Particulate (1e- 3 pCilm 3 )

Gross Beta 416 10 16.2 (3641364)

(4.65-41.9)

FE 4.9mi.

ESE

21. 0 (52/52)

(8. 95-41.9) 15.7 (52152)

(6.74-27.4) 0 I GAMMA Cs-134 32 32 50 <LLD N/A <LLD <LLD 0 I Cs-137 32 60 <LLD NIA <LLD <LLD 0 Be-7 32 139 (28128) FE 4.9mi. 186 (414) 135 (414) 0 I Air Iodine 1-131 416 70 (86.9-212)

<LLD NIA ESE (1 68-212)

<LLD (127-144)

<LLD 0 (1e- 3 pCi/m 3 )

I Milk (pCi/Liter)

SR-89 4 5 <LLD NIA <LLD NA 0 I SR-90 4 1 1.76 (414)

(1.26-2.06)

CP 3.7mi.

NNW 1.76(414)

(1. 26-2.06)

NA 0 GAMMA 36 I Cs-134 36 15 '<LLD NIA <LLD <LLD 0 Cs-137 36 18 <LLD NIA <LLD <LLD 0 I Ba-140 36 60 <LLD NIA <LLD <LLD 0 I La-140 36 15 <LLD NIA <LLD <LLD 0 I 1-131 36 1 <LLD NIA <LLD <LLD 0 K-40 36 1184 (24124) CP 3.7mi. 1186 (12/12) 1152 (12112) 0 I (987-1484) NNW (10 01-1306) (984-1344)

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I Surry Nuclear Power Station Surry County, Virginia Annual Radiological Environmental Operating Report 2021 I TABLE 3-1: RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

SURRY NUCLEAR POWER STATION Docket No. 50-280-281 I Medium or Analysis Type Total Number LLD Indicator Locations Mean Location with Highest Mean Distance Mean Control Locations Mean Number of Nonroutine Reported Pathway Sampled I Direction I (Range) (Range) Measurements I (Units) (Range) Number Food Products GAMMA 3 (pCi/kg wet) Cs-134 3 60 <LLD N/A <LLD N/A 0 I Cs-137 3 80 <LLD N/A <LLD N/A 0

<LLD N/A <LLD N/A 0 I

1-131 3 60 K-40 3 9396 (3/3) SLADE 3.2mi. 19670 (1/1) NA 0 s

I Well Water H-3 12 2000 (2202-19670)

<LLD N/A (19670-19670)

<LLD N/A 0 (pCi/Liter)

I GAMMA Mn-54 12 12 15 <LLD N/A <LLD N/A 0 Co-58 12 15 <LLD N/A <LLD N/A 0 I Fe-59 12 12 30 15

<LLD

<LLD N/A N/A

<LLD

<LLD N/A N/A 0

0 Co-60 I Zn-65 12 30 <LLD N/A <LLD N/A 0 I Nb-95 12 15 <LLD N/A <LLD N/A 0 I Zr-95 12 30 <LLD

<LLD N/A <LLD

<LLD N/A N/A 0

0 1-131 12 1. N/A I Cs-134 12 15 <LLD N/A <LLD N/A 0 I Cs-137 12 18 <LLD N/A <LLD N/A 0 I Ba-140 12 60 <LLD N/A <LLD

<LLD N/A NIA 0

0 La-140 12 15 <LLD N/A I*

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I Surry Nuclear Power Station Surry County, Virginia Annual Radiological Environmental Operating Report 2021 I TABLE 3-1: RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

SURRY NUCLEAR POWER STATION Docket No. 50-280-281 I Medium or Analysis Total LLD Indicator Locations Location with Highest Mean Control Locations Number of Non routine Pathway Sampled Type Number Mean Distance Mean Mean Reported I I I (Units)

River Water (pCi/Liter)

H-3 8 2000 (Range)

<LLD Number NIA Direction (Range)

<LLD (Range)

<LLD Measurements 0

GAMMA 24 I Mn-54 24 15 <LLD NIA <LLD <LLD 0 Co-58 24 15 <LLD NIA <LLD <LLD 0 I Fe-59 24 30 <LLD NIA <LLD <LLD 0 I Co-60 24 15 <LLD NIA <LLD <LLD 0 I Zn-65 24 30 <LLD NIA <LLD <LLD 0 Nb-95 24 15 <LLD NIA <LLD <LLD 0 I Zr-95 24 30 <LLD NIA <LLD <LLD 0 I 1-131 24 10 <LLD NIA <LLD <LLD 0 I Cs-134 24 15 <LLD NIA <LLD <LLD 0 Cs-137 24 18 <LLD N/A <LLD <LLD 0 I Ba-140 24 60 <LLD N/A <LLD <LLD 0 I La-140 24 15 <LLD NIA <LLD <LLD 0 i K-40 24 98.8 (5112)

(86.3-115)

SD 0.4mi.

NW 98.8 (5112)

(86.3-115) 74.0 (1112)

(74.0-74.0) 0 I Th-228 24 12.8 (1112)

(12.8-12.8)

SD 0.4mi.

NW 12.8 (1112)

(12.8-12.8) 8.24 (1112)

(8.24-8.24) 0 I

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I Surry Nuclear Power Station Surry County, Virginia Annual Radiological Environmental Operating Report 2021 I TABLE 3-1: RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

SURRY NUCLEAR POWER STATION Docket No. 50-280-281 I Medium or Analysis Total LLD Indicator Locations Location with Highest Mean Control Locations Number of Nonroutine Pathway Sampled Type Number Mean Distance Mean Mean Reported I I I (Units)

Sediment Silt (pCi/kg dry)

GAMMA CS-134 6

6 150 (Range)

<LLD Number N/A Direction (Range)

<LLD (Range)

<LLD Measurements 0

I Cs-137 6 180 220 (1/4) SI 1.8 mi. 220 (1/2) <LLD 0 (220-220) ESE (220-220)

K-40 6 15435 (4/4) SD 0.5mi. 15605 (2/2) 15230 (2/2) 0 I Ra-226 6 (12420-18790) 1990 (1/4) CHIC NW 11.2 mi.

(12420-18790) 3469 (1/2)

(14730-15730) 3469 (1/2) 0 (1990-1990) WNW (3469-3469) (3469-3469)

I Ac-228 6 1234 (1/4)

(1234-1234)

SI 1.8 mi.

ESE 1234 (1/4)

(1234-1234)

<LLD 0 I Th-228 6 1061 (4/4)

(754-1245)

CHIC 11.2 mi.

WNW 1256 (2/2)

(1220-1291) 1256 (2/2)

(1220-1291) 0 Th-232 6 1119 (3/4) SD 0.5mi. 1147 (2/2) 1141 (2/2) 0 I BE-7 6 (1062-1170) 1854 (2/4)

(1623-2084)

SD NW 0.5mi.

NW (1124-1170) 2084 (1/2)

(2084-2084)

(1111-1171)

<LLD 0 I Shoreline Sediment (pCi/kg dry)

GAMMA CS-134 4

4 150 <LLD NIA <LLD <LLD 0 I CS-137 4 180 <LLD N/A <LLD <LLD 0 I K-40 4 5203 (2/2)

(4260-6145)

HIR 0.6mi.

N 5203 (2/2)

(4260-6145) 1695 (2/2)

(1561-1829) 0 Th-228 4 79.9 (2/2) CHIC 11.2 mi. 334 (2/2) 334 (2/2) 0 I Th-232 4 (61.3-98.5)

<LLD CHIC WNW 11.2 mi.

(89.8-579) 709 (1/2)

(89.8-579) 709 (1/2) 0 WNW (709-709) (709-709)

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I Surry Nuclear Power Station Surry County, Virginia Annual Radiological Environmental Operating Report 2021 I TABLE 3-1: RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

SURRY NUCLEAR POWER STATION Docket No. 50-280-281 I Medium or Analysis Total LLD Indicator Locations Location with Highest Mean Control Locations Number of Nonroutine Pathway Sampled Type Number Mean I Distance I Mean Mean Reported I (Units)

Fish (pCi/kg wet)

GAMMA Mn-54 4

4 130 (Range)

<LLD Number NIA Direction (Range)

<LLD (Range)

NIA Measurements 0

I Co-58 4 130 <LLD NIA <LLD NIA 0 I Fe-59 4 260 <LLD NIA <LLD NIA 0 Co-60 4 130 <LLD NIA <LLD NIA 0 I Zn-65 4 260 <LLD NIA <LLD NIA 0 I Cs-134 4 130 <LLD NIA <LLD NIA 0 I Cs-137 4 150 <LLD NIA <LLD NIA 0 I Oysters K-40 GAMMA 4

6 1977 (414)

(1336-3077)

SD 1.3 mi.

NNW 1977 (414)

(1336-3077)

NA 0 I

(pCilkg wet) Mn-54 6 130 <LLD NIA <LLD NIA 0 Co-58 6 130 <LLD NIA <LLD NIA. 0 I Fe-59 6 260 <LLD NIA <LLD NIA 0 I Co-60 6 130 <LLD NIA <LLD NIA 0 I Zn-65 6 260 <LLD NIA <LLD NIA 0 Cs-134 6 130 <LLD NIA <LLD NIA 0 I Cs-137 6 150 <LLD NIA <LLD NIA 0 I

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I Surry Nuclear Power Station Surry County, Virginia Annual Radiological Environmental Operating Report 2021 I TABLE 3-1: RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

SURRY NUCLEAR POWER STATION Docket No. 50-280-281 I Medium or Analysis Total LLD Indicator Locations Location with Highest Mean Control Locations Number of Nonroutine Mean Reported Pathway Sampled Type Number Mean I Distance I Mean I (Units)

Clams (pCi/kg wet)

GAMMA Mn-54 6

6 130 (Range)

<LLD Number NIA Direction (Range)

<LLD (Range)

<LLD Measurements 0

I Co-58 6 130 <LLD NIA <LLD <LLD 0 I Fe-59 6 260 <LLD NIA <LLD <LLD 0 Co-60 6 130 <LLD NIA <LLD <LLD 0 I Zn-65 6 260 <LLD NIA <LLD <LLD 0 I Cs-134 6 130 <LLD NIA <LLD <LLD 0 I Cs-137 6 150 <LLD NIA <LLD <LLD 0 I Crabs (pCilkg wet)

GAMMA Mn-54 130 <LLD NIA <LLD NIA 0 I Co-58 Fe-59 130 260

<LLD

<LLD NIA NIA

<LLD

<LLD NIA NIA 0

0 I Co-60 130 <LLD NIA <LLD NIA 0 I Zn-65 260 <LLD NIA <LLD NIA 0 I Cs-134 130 <LLD NIA <LLD NIA 0 Cs-137 150 <LLD NIA <LLD NIA 0 I K--40 1569 (111) SD 1.3 mi. 1569 (111) NA 0 (1569-1569) NNW (1569-1569)

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I I 3.2 Analytical Results of 2021 REMP Samples I Radiological analyses of environmental media characteristically approach and frequently fall below the detection limits of state-of-the-art measurement methods. The reported error is two times the standard deviation (2cr) of the net activity. Unless otherwise noted, the overall error (counting, sample size, I chemistry, errors, etc.) is estimated to be 2 to 5 times that listed. Results are considered positive when the measured value exceeds 2cr uncertainty, unless otherwise noted. MDC is noted in the footnote in I several tables. The term <MDC means the value is less than its Minimum Detectable Concentration and is therefore, not considered a positive value or result. Positive values or results are indicated by bold text.

I Teledyne Brown Engineering analytical methods meet the Lower Limit of Detection (LLD) requirements I given in Table 2 of the USN RC Branch Technical Position, "An Acceptable Radiological Environmental Monitoring Program", (November 1979, Revision 1) and the Surry ODCM.

I Data are given according to sample type as indicated below.

1. Gamma Exposure Rate

2. Air Particulates, Weekly Gross Beta Radioactivity I 3. Air Particulates, Weekly 1-131

4. Air Particulates, Quarterly Gamma Spectroscopy I 5. Animal Milk

6. Food Products

7. Well Water I 8. River Water

9. Silt

10. Shoreline Sediment I 11. Fish

12. Oysters I 13.Clams 14.Crabs I

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I Surry Nuclear Power Station Surry County, Virginia Annual Radiological Environmental Operating Report 2021 I TABLE 3-2 GAMMA EXPOSURE RATE (mR/Std. Month) +/- 2 Sigma I MDDa = 3 x cra = 3 x 1.0 = 3 (5)

MDDA = 3 x O"A = 3 x 2.8 = 8.8 (10)

Note: If MDDa < 5 mR, THEN MDDa rounded to 5 mR (ANSI N13.37)

Note: If MDDA < 10 mR, THEN MDDA rounded to 10 mR (ANSI N13.37)

I Quarterly Baseline, Normalized Quarterly Monitoring Data, Ma (mrem per standard quarter)

Quarterly Facility Dose*

Fa= Ma - Ba (mrem)

Annual Baseline Annual Monitoring Data Annual Facility Dose 0

Ba I Monitoring Location 2

Baseline, (mrem) 19.8 19.2 1

19.6 19.6 2

20.9 19.9 3

19.3 17.4 4

20.1 18.9 1

ND ND 2

ND ND 3

ND ND 4

ND ND BA (mrem) 79.2 76.9 MA (mrem) 79.9 75.8 FA=MA - BA (mrem)

ND ND 3

I 4 5

6 17.9 19.0 18.4 17.4 19.0 18.0 19.0 19.6 18.6 17.4 18.3 17.7 17.7 18.6 19.1 ND ND ND ND ND ND ND ND ND ND ND ND 71.7 76.0 73.8 71.4 75.5 73.4 ND ND ND 7 18.7 17.0 19.6 19.0 17.4 ND ND ND ND 74.6 73.0 ND I 8 9

10 17.0 23.2 18.1 17.0 23.4 18.0 17.7 23.4 19.0 15.5 20.6 17.7 18.3 22.6 18.3 ND ND ND ND ND ND ND ND ND ND ND ND 68.4 92.8 72.5 68.5 90.1 72.9 ND ND ND 11 16.1 16.1 16.7 15.8 15.5 ND ND ND ND 64.2 64.1 ND I 12 13 14 16.6 18.6 17.9 16.4 18.6 17.7 16.4 18.6 19.3 15.5 17.7 16.4 17.0 18.6 18.6 ND ND ND ND ND ND ND ND ND ND ND ND 66.4 74.5 71.6 65.3 73.6 72.0 ND ND ND 15 18.5 17.7 18.3 17.0 19.5 ND ND ND ND 74.1 72.6 ND I 16 18 19 17.0 14.5 15.5 17.7 15.8 16.1 17.7 14.8 15.5 15.5 13.9 14.5 17.7 15.5 15.5 ND ND ND ND ND ND ND ND ND ND ND ND 67.7 58.0 62.1 68.5 59.9 61.5 ND ND ND 20 14.3 14.5 14.2 13.5 13.4 ND ND ND ND 57.4 55.6 ND I 21 22 23 15.1 13.2 18.1 15.4 13.5 20.1 15.5 13.3 19.1 14.2 12.0 16.8 15.6 13.1 19.0 ND ND ND ND ND ND ND ND ND ND ND ND 60.5 52.7 72.3 60.7 51.8 75.0 ND ND ND 24 14.8 13.5 15.2 13.9 14.3 ND ND ND ND 59.2 56.9 ND I 25 26 27 18.1 15.7 14.7 19.2 15.1 14.5 19.4 15.8 15.5 17.1 13.3 13.3 18.1 15.6 15.3 ND ND ND ND ND ND ND ND ND ND ND ND 72.3 62.9 58.7 73.8 59.9 58.6 ND ND ND 28 14.2 14.8 14.6 12.7 15.0 ND ND ND ND 56.8 57.1 ND I 29 30 31 13.2 14.4 12.3 13.1 15.1 13.1 13.3 14.3 12.7 12.4 13.0 10.9 13.7 14.7 12.2 ND ND ND ND ND ND ND ND ND ND ND ND 52.9 57.7 49.2 52.6 57.1 48.9 ND ND ND 32 15.2 14.5 14.9 14.0 14.3 ND ND ND ND 60.7 57.7 ND I 33 34 35 14.2 16.0 18.6 15.8 16.8 20.1 15.5 17.1 20.2 14.0 14.9 16.7 15.9 16.5 20.0 ND ND ND ND ND ND ND ND ND ND ND ND 57.1 64.1 74.4 61.2 65.3 77.0 ND ND ND 36 18.6 19.5 19.2 16.8 18.4 ND ND ND ND 74.4 73.8 ND I 37 38 39C 15.4 20.9 14.9 16.1 17.1 15.0 16.4 17.4 16.1 13.7 15.5 14.0 14.7 16.5 14.5 ND ND ND ND ND ND ND ND ND ND ND ND 61.7 83.6 59.7 60.9 66.5 59.6 ND ND ND 40C 16.2 15.4 16.7 14.5 16.2 ND ND ND ND 64.7 62.8 ND I 41C 42 43 21.8 16.4 14.3 21.2 15.8 17.4 21.8 16.7 14.8 20.2 14.8 13.9 20.8 15.8 14.6 ND ND ND ND ND ND ND ND ND ND ND ND 87.3 65.5 57.3 84.1 63.1 60.6 ND ND ND I *ND= Not detected, where Ma< (Ba+ MDDa)

"ND= Not detected, where MA< (BA+ MDDA) d = Damaged TLDs; m = Missing TLDs; v = Vendor reports TLD not received.

N/A = Missing or Damaged TLD Reading Not Available for Calculation.

I Note: Table formatted in accordance with ANSI/HPS N13.37-2014, Environmental Dosimetry Criteria for system Design and Implementation.

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Surry Nuclear Power Station Surry County, Virginia TABLE 3-3 Annual Radiological Environmental Operating Report 2021 AIR PARTICULATES GROSS BETA RADIOACTIVITY (1.0E-3 pCi/m 3 +/- 2 Sigma)

SAMPLING LOCATIONS COLLECTION DATE SS HIR BC ALL CP BASF FE NN-C January 5 9.57 +/- 2.64 7.49 +/- 2.51 11.0 +/- 2.77 13.3 +/- 2.95 10.9 +/- 2.75 9.51 +/- 2.61 11.1 +/- 2.73 12.7 +/- 2.92 January 11/12 13.2 +/- 2.83 8.76 +/- 2.56 11.3 +/- 2.76 13.9 +/- 2.94 15.7 +/-. 2.97 13.6 +/- 2.82 13.4 +/- 3.17 13.5 +/- 2.93 January 19 17.6 +/- 2.96 14.4 +/- 2.78 19.9 +/- 3.19 19.5 +/- 3.21 19.7 +/- 3.17 19.6 +/- 3.12 22.3 +/- 3.53 20.9 +/- 3.27 January 26 11.5 +/- 2.83 9.88 +/- 2.73 11.9 +/- 2.87 7.48 +/- 2.64 13.2 +/- 2.94 12.1 +/- 2.83 14.5 +/- 2.97 12.4 +/- 2.97 Feburary 2 6.25 +/- 2.45 6.58 +/- 2.45 6.22 +/- 2.49 8.94 +/- 2.69 9.36 +/- 2.68 7.20 +/- 2.49 8.95 +/- 2.60 7.89 +/- 2.63 Feburary 9 9.71 +/- 2.47 11.0 +/- 2.52 15.1 +/- 2.74 9.34 +/- 2.48 14.1 +/- 2.72 10.8 +/- 2.49 17.3 +/- 2.86 12.6 +/- 2.71 Feburary 16 9.17 +/- 2.65 9.80 +/- 2.65 13.4 +/- 2.99 12.7 +/- 2.92 10.6 +/- 2.76 8.71 +/- 2.60 13.0 +/- 2.81 11.1 +/- 2.83 Feburary 23 15.6 +/- 2. 78 14.1 +/- 2.65 15.4 +/- 2.71 14.7 +/- 2.68 17.0 +/- 2.78 15.1 +/- 2.64 20.4 +/- 2.93 17.6 +/- 2.87 March 2 13.7 +/- 2.95 8.16 +/- 2.59 12.2 +/- 2.88 12.7 +/- 2.92 13.5 +/- 2.92 10.5 +/- 2.69 14.8 +/- 2.93 10.0 +/- 2.78 March 8 12.0 +/- 2.98 12.9 +/- 3.00 13.5 +/- 3.08 13.4 +/- 3.13 14.8 +/- 3.18 10.6 +/- 2.87 18.0 +/- 3.30 11.1 +/- 3.03 March 16 18.9 +/- 2.82 14.4 +/- 2.56 19.3 +/- 2.88 19.0 +/- 2.87 19.3 +/- 2.85 16.4 +/- 2.66 23.4 +/- 3.00 16.3 +/- 2.77 March 23 14.9 +/- 2.75 10.6 +/- 2.47 15.8 +/- 2.81 13.6 +/- 2.71 13.7 +/- 2.69 14.2 +/- 2.67 18.8 +/- 2.93 13.9 +/- 2.75 March 29 9.92 +/- 2.96 6.00 +/- 2.66 7.55 +/- 2.79 9.98 +/- 3.00 9.63 +/- 2.92 8.84 +/- 2.81 14.5 +/- 3.16 9.24 +/- 2.96 Qtr. Avg.+/- 2 s.d. 12.5 +/- 7.28 10.3 +/- 5.86 13.3 +/- 7.94 13.0 +/- 7.12 14.0 +/- 6.73 12.1 +/- 7.06 16.2 +/- 8.61 13.0 +/- 7.13 April 6 22.7 +/- 2.95 13.8 +/- 2.46 17.6 +/- 2.76 17.8 +/- 2.77 17.3 +/- 2.71 15.8 +/- 2.61 24.1 +/- 3.03 19.7 +/- 2.94 April 13 15.2 +/- 2.94 11.2 +/- 2.68 12.5 +/- 2.71 13.7 +/- 2.89 13.9 +/- 2.82 12.0 +/- 2.64 15.1 +/- 2.81 13.1 +/- 2.78 April 19/20 7.67 +/- 2.67 4.65 +/- 2.44 6.97 +/- 2.60 9.67 +/- 2.55 8.73 +/- 2.45 7.56 +/- 2.31 10.8 +/- 2.51 9.57 +/- 2.54 April 27 17.3 +/- 2.65 11.6 +/- 2.29 15.8 +/- 2.59 17.1 +/- 2.90 21.7 +/- 3.13 17.1 +/- 2.84 23.3 +/- 3.12 19.9 +/- 3.12 May 4 19.3 +/- 3.00 12.6 +/- 2.59 18.9 +/- 2.97 18.9 +/- 3.01 18.3 +/- 2.94 18.5 +/- 2.89 23.8 +/- 3.18 20.1 +/- 3.09 May11 14.1 +/- 2.69 10.5 +/- 2.45 10.9 +/- 2.51 10.2 +/- 2.48 10.7 +/- 2.51 11.0 +/- 2.47 14.4 +/- 2.68 12.3 +/- 2.67 May 18 10.6 +/- 2.53 8.97 +/- 2.41 10.4 +/- 2.52 11.6 +/- 2.62 10.1 +/- 2.51 10.6 +/- 2.50 14.7 +/- 2.74 12.0 +/- 2.70 May 25 17.5 +/- 3.16 15.4 +/- 3.03 17.4 +/- 3.18 17.8 +/- 3.21 19.0 +/- 3.25 15.9 +/- 3.03 21.9 +/- 3.32 17.2 +/- 3.22 June 1 13.4 +/- 2.73 11.0 +/- 2.57 12.3 +/- 2.68 12.6 +/- 2.70 14.9 +/- 2.81 13.4 +/- 2.67 17.6 +/- 2.90 16.5 +/- 2.96 June 8 8.63 +/- 2.63 8.19 +/- 2.55 8.02 +/- 2.56 7.68 +/- 2.60 9.00 +/- 2.64 9.68 +/- 2.64 12.4 +/- 2.79 7.67 +/- 2.62 June 15 6. 71 +/- 2.34 7.47 +/- 2.37 8.66 +/- 2.51 5.25 +/- 2.33 8.47 +/- 2.51 6.82 +/- 2.36 12.1 +/- 2.70 6.74 +/- 2.45 June 21 15.4 +/- 3.35 10.0 +/- 2.99 16.3 +/- 3.40 18.4 +/- 3.56 16.8 +/- 3.42 18.6 +/- 3.45 24.1 +/- 3.73 15.9 +/- 3.43 June 29 10.7 +/- 2.51 9.03 +/- 2.66 9.90 +/- 2.42 8.70 +/- 2.44 9.65 +/- 2.41 7.21 +/- 2.27 10.7 +/- 2.43 9.47 +/- 2.46 Qtr. Avg.+/- 2 s.d. 13.8 +/- 9.57 10.3 +/- 5.61 12.7 +/- 8.06 13.0 +/- 9.22 13.7 +/- 9.12 12.6 +/- 8.49 17.3 +/- 10.8 13.9 +/- 9.40 29

Surry Nuclear Power Station Surry County, Virginia TABLE 3-3 Annual Radiological Environmental Operating Report 2021 AIR PARTICULATES GROSS BETA RADIOACTIVITY (1.0E-J pCi/m 3 +/- 2 Sigma)

SAMPLING LOCATIONS COLLECTION DATE ss HIR BC ALL CP BASF FE NN-C July 7 9.87 +/- 2.24 11.8 +/- 2.58 10.2 +/- 2.32 13.1 +/- 2.55 13.5 +/- 2.51 10.2 +/- 2.30 15.4 +/- 2.56 10.4 +/- 2.36 July 13 12.2 +/- 3.19 12.9 +/- 3.23 12.0 +/- 3.08 13.6 +/- 3.24 14.8 +/- 3.26 10.5 +/- 2.95 17.8 +/- 3.40 16.0 +/- 3.41 July 19 12.3 +/- 3.18 12.3 +/- 3.17 13.8 +/- 3.37 14.4 +/- 3.47 14.8 +/- 3.40 10.8 +/- 3.13 16.9 +/- 3.52 13.6 +/- 3.43 July 27 18.0 +/- 2.85 17.8 +/- 2.84 15.9 +/- 2.71 14.8 +/- 2.69 17.0 +/- 2.75 16.2 +/- 2.66 22.8 +/- 3.03 16.3 +/- 2.76 August 3 22.0 +/- 3.41 19.0 +/- 3.27 22.0 +/- 3.46 19.5 +/- 3.35 20.1 +/- 3.30 16.9 +/- 3.08 28.9 +/- 3.68 19.3 +/- 3.35 August 9 11.8 +/- 2.96 14.8 +/- 3.34 15.3 +/- 3.21 16.4 +/- 3.34 16.6 +/- 3.35 14.1 +/- 3.18 20.1 +/- 3.56 11.3 +/- 3.16 August 17 12.7 +/- 2.56 9.42 +/- 2.36 14.6 +/- 2.72 15.6 +/- 2.80 12.7 +/- 2.57 14.5 +/- 2.60 19.6 +/- 2.86 14.6 +/- 2.70 August 23 8.08 +/- 2.59 9.64 +/- 2.73 6.83 +/- 2.55 8.76 +/- 2.72 10.5 +/- 2.77 5.41 +/- 2.57 11.9 +/- 2.82 10.1 +/- 2.81 August 31 25.0 +/- 3.12 26.6 +/- 3.18 26.0 +/- 3.19 24.5 +/- 3.16 25.6 +/- 3.16 28.3 +/- 3.24 35.2 +/- 3.55 23.4 +/- 3.10 September? 15.1 +/- 2.68 16.7 +/- 2.77 18.1 +/- 2.88 14.3 +/- 2.69 14.8 +/- 2.67 14.1 +/- 2.61 22.9 +/- 3.08 14.6 +/- 2.73 September 13 14.4 +/- 3.03 18.4 +/- 3.25 17.2 +/- 3.18 15.7 +/- 3.16 17.4 +/- 3.20 18.2 +/- 3.20 25.9 +/- 3.60 15.9 +/- 3.19 September 21 23.0 +/- 3.05 20.2 +/- 2.91 28.2 +/- 3.31 18.1 +/- 2.88 23.6 +/- 3.10 26.6 +/- 3.19 30.0 +/- 3.35 24.1 +/- 3.16 September 28 15.4 +/- 3.04 12.2 +/- 2.84 16.8 +/- 3.04 17.6 +/- 3.11 17.5 +/- 3.07 22.0 +/- 3.25 22.8 +/- 3.28 18.4 +/- 3.20 Qtr. Avg. +/- 2 s.d. 15.4 +/- 10.4 15.5 +/- 9.76 16.7 +/- 11.9 15.9 +/- 7.42 16.8 +/- 8.46 16.0 +/- 13.1 22.3 +/- 12.9 16.0 +/- 8.85 October5 25.7 +/- 3.43 22.2 +/- 3.24 29.1 +/- 3.69 21.7 +/- 3.36 27.8 +/- 3.59 27.0 +/- 3.51 37.8 +/- 3.97 20.2 +/- 3.29 October 12 13.4 +/- 2.85 11.2 +/- 2.71 14.7 +/- 2.91 14.6 +/- 2.96 13.1 +/- 2.83 15.7 +/- 2.95 18.4 +/- 3.11 13.6 +/- 2.93 October 19 16.9 +/- 2.86 17.1 +/- 2.88 15.9 +/- 2.83 11.3 +/- 2.61 16.6 +/- 2.87 19.2 +/- 2.96 22.4 +/- 3.14 13.2 +/- 2.73 October 26 23.4 +/- 3.35 25.1 +/- 3.45 34.7 +/- 3.87 31.3 +/- 3.77 27.6 +/- 3.55 31.3 +/- 3.66 41.9 +/-4.12 25.1 +/- 3.49 November2 9.85 +/- 2.70 7.10 +/- 2.53 10.6 +/- 2.68 7.94 +/- 2.54 9.02 +/- 2.56 10.5 +/- 2.61 14.9 +/- 2.88 10.2 +/- 2.70 November9 14.8 +/- 2.76 15.4 +/- 2.80 18.1 +/- 3.03 20.5 +/- 3.19 18.6 +/- 3.04 18.9 +/- 3.01 24.7 +/- 3.33 20.3 +/- 3.22 November 16 18.8 +/- 3.03 19.0 +/- 3.03 26.5 +/- 3.44 25.1 +/- 3.42 25.1 +/- 3.37 23.4 +/- 3.25 33.7 +/- 3.74 27.4 +/- 3.57 November23 11.7 +/- 2.66 17.2 +/- 2.97 19.0 +/- 3.09 18.2 +/- 3.07 16.0 +/- 2.90 18.2 +/- 2.99 21.8 +/- 3.17 18.5 +/- 3.11 November30 16.6 +/- 2.98 19.0 +/- 3.11 19.1 +/- 3.14 15.1 +/- 2.97 17.4 +/- 3.05 18.4 +/- 3.08 25.1 +/- 3.41 21.8 +/- 3.34 December? 24.4 +/- 3.32 26.3 +/- 3.40 32.9 +/- 3.72 26.3 +/- 3.45 29.5 +/- 3.54 25.4 +/- 3.32 34.5 +/- 3.73 27.4 +/- 3.54 December 14 21.9 +/- 3.27 21.9 +/- 3.26 26.4 +/- 3.51 21.5 +/- 3.31 22.3 +/- 3.31 22.0 +/- 3.27 36.1 +/- 3.89 24.7 +/- 3.51 December21 16.1 +/- 2.96 16.9 +/- 2.99 16.8 +/- 3.00 16.3 +/- 3.01 16.7 +/- 2.99 21.0 +/- 3.18 26.0 +/- 3.43 14.8 +/- 2.88 December28 28.4 +/- 3.52 30.3 +/- 3.58 32.0 +/- 3.68 28.5 +/- 3.57 24.9 +/- 3.38 31.1 +/- 3.58 30.4 +/- 3.61 24.1 +/- 3.29 Qtr.Avg.+/-2s.d. 18.6 +/- 11.4 19.1 +/- 12.4 22.8 +/- 15.7 19.9 +/- 13.7 20.4 +/- 12.6 21.7 +/- 11.9 28.3 +/- 16.2 20.1 +/- 11.4 Ann. Avg.+/- 2 s.d. 15.1 +/- 10.6 13.8 +/- 11.4 16.4 +/- 13.7 15.4 +/- 11.0 16.2 +/- 10.7 15.6 +/- 12.7 21.0 +/- 15.5 15.7 +/- 10.6 30

Surry Nuclear Power Station Surry County, Virginia TABLE 3-4 Annual Radiological Environmental Operating Report 2021 AIRBORNE IODINE (1.0E"3 pCi/m 3 +/- 2 Sigma)

Sampling Stations COLLECTION DATE ss HIR BC ALL CP BASF FE NN-C January 5 -5.10 +/- 12.0 -5.07 +/- 11.9 -5.19 +/- 12.2 -5.31 +/- 12.5 -3.31 +/- 16.0 -1.35 +/- 6.54 -3.26 +/- 15.8 -3.40 +/- 16.4 January 11/12 6.61 +/- 10.8 6.55 +/- 10.7 6.71 +/- 10.9 6.78 +/- 11.0 1.09 +/- 19.3 1.07 +/- 19.0 1.31 +/- 23.2 1.12 +/- 19.9 January 19 5.10 +/- 24.1 5.07 +/- 24.0 5.42 +/- 25.7 5.51 +/- 26.1 -11.4 +/- 22.6 -11.1 +/- 22.0 -13.1 +/- 25.9 -11.5 +/- 22.9 January 26 3.18 +/- 5.62 3.17 +/- 5.60 3.27 +/- 5.77 3.31 +/- 5.85 2.85 +/- 12.4 2.79 +/- 12.1 1.34 +/- 5.82 2.93 +/- 12.7 Feburary 2 3.89 +/- 9.91 3.85 +/- 9.80 4.05 +/- 10.3 4.09 +/- 10.4 -4.01 +/- 10.0 -3.89 +/- 9.66 -3.89 +/- 9.66 -4.06 +/- 10.1 Feburary 9 -7.78 +/- 21.6 -7.67 +/- 21.3 -7.66 +/- 21.3 -8.07 +/- 22.4 -2.07 +/- 17.7 -2.03 +/- 17.4 -2.02 +/- 17.3 -2.12 +/- 18.2 Feburary 16 0.72 +/- 16.6 0.71 +/- 16.4 0.77 +/- 17.6 0.76 +/- 17.5 -6.18 +/- 12.4 -6.04 +/- 12.2 -4.94 +/- 9.95 -6.23 +/- 12.6 Feburary 23 -10.5 +/- 11.0 -10.3 +/- 10.8 -10.3 +/- 10.8 -10.4 +/- 10.9 3.75 +/- 15.1 3.68 +/- 14.8 3.68 +/- 14.8 3.85 +/- 15.5 March 2 -4.23 +/- 23.2 -4.17 +/- 22.8 -4.25 +/- 23.3 -4.27 +/- 23.4 -11.5 +/- 14.7 -9.37 +/- 11.9 -11.2 +/- 14.3 -11.8 +/- 15.0 March 8 8.42 +/- 13.7 4.24 +/- 6.91 8.42 +/- 13.7 8.61 +/- 14.1 -4.47 +/- 12.6 -4.35 +/- 12.2 -4.36 +/- 12.2 -4.58 +/- 12.9 March 16 -9.16 +/- 10.9 -9.04 +/- 10.7 -9.34 +/- 11.1 -9.33 +/- 11.1 5.90 +/- 10.8 5.76 +/- 10.5 5.76 +/- 10.5 6.10 +/- 11.1 March 23 2.85 +/- 9.73 2.81 +/- 9.60 2.86 +/- 9.77 2.90 +/- 9.91 -3.51 +/- 11.3 -3.42 +/- 11.0 -3.43 +/- 11.0 -3.58 +/- 11.5 March 29 -7.26 +/- 12.4 -7.12 +/- 12.1 -7.19 +/- 12.3 -7.34 +/- 12.5 6.05 +/- 10.4 4.92 +/- 8.47 5.90 +/- 10.2 6.16 +/- 10.6 April 6 0.89 +/- 14.5 0.37 +/- 5.95 0.93 +/- 15.1 0.92 +/- 14.9 11.5 +/- 9.84 A 11.3 +/- 9.73 A 11.4 +/- 9.81 A 12.1 +/- 10.4 A April 13 4.84 +/- 10.0 4.77 +/- 9.87 4.72 +/- 9.77 4.92 +/- 10.2 -1.43 +/- 11.8 -1.38 +/- 11.4 -1.38 +/- 11.4 -1.43 +/- 11.8 April 19/20 12.8 +/- 16.5 12.7 +/- 16.4 12.6 +/- 16.3 10.9 +/- 14.0 -8.03 +/- 15.4 -7.77 +/- 14.9 -7.74 +/- 14.8 -8.13 +/- 15.6 April 27 1.33 +/- 9.53 1.30 +/- 9.31 1.34 +/- 9.59 1.47 +/- 10.5 1.21 +/- 10.0 1.19 +/- 9.82 1.15 +/- 9.54 1.25 +/- 10.4 May4 19.7 +/- 15.7 A 19.3 +/- 15.4 A 19.6 +/- 15.7 A 19.9 +/- 15.9 A -6.58 +/- 11.9 -6.37 +/- 11.5 -6.43 +/- 11.6 -6.75 +/- 12.2 May 11 -4.39 +/- 7.95 -4.33 +/- 7.85 -4.40 +/- 7.97 -4.45 +/- 8.06 -3.16 +/- 7.29 -3.07 +/- 7.08 -3.06 +/- 7.07 -3.25 +/- 7.49 May 18 -5.50 +/- 15.0 -5.45 +/- 14.9 -5.52 +/- 15.0 -5.56 +/- 15.2 0.59 +/- 11.3 0.58 +/- 11.1 0.58 +/- 11.0 0.61 +/- 11.7 May 25 4.77 +/- 16.0 4.74 +/- 16.0 4.81 +/- 16.2 4.83 +/- 16.2 -9.40 +/- 19.0 -9.14 +/- 18.4 -9.13 +/- 18.4 -9.62 +/- 19.4 June 1 18.5 +/- 16.8 A 18.3 +/- 16.6 A 18.7 +/- 16.9 A 18.6 +/- 16.9 A 12.4 +/- 11.0 A 6.13 +/- 5.47 A 12.0 +/- 10.7 A 12.7 +/- 11.3 A June 8 -1.76 +/- 12.7 -1.72 +/- 12.4 -1.73 +/- 12.5 -1.19 +/- 8.57 -1.74 +/- 12.5 -7.93 +/- 12.8 -7.90 +/- 12.8 -8.30 +/- 13.4 June 15 1.85 +/- 7.74 1.83 +/- 7.64 1.90 +/- 7.95 1.95 +/- 8.15 -19.2 +/- 18.7 -18.8 +/- 18.3 -18.8 +/- 18.3 -19.6 +/- 19.1 June 21 8.35 +/- 19.4 8.20 +/- 19.0 8.48 +/- 19.7 8.64 +/- 20.0 11.8 +/- 17.6 4.78 +/- 7.15 11.4 +/- 17.0 11.9 +/- 17.8 June 29 4.96 +/- 10.5 5.59 +/- 11.8 4.86 +/- 10.3 5.10 +/- 10.8 -0.69 +/- 7.39 -0.69 +/- 7.41 -0.67 +/- 7.19 -0.71 +/- 7.60 A= <MDC 31

Surry Nuclear Power Station Surry County, Virginia TABLE 3-4 Annual Radiological Environmental Operating Report 2021 AIRBORNE IODINE (1.0E"3 pCi/m 3 +/- 2 Sigma)

Sam lin Stations COLLECTION DATE SS HIR BC ALL CP BASF FE NN-C July 7 3.93 +/- 13.2 4.45 +/- 15.0 4.11 +/- 13.8 4.25 +/- 14.3 -6.88 +/- 13.5 -6.78 +/- 13.3 -6.63 +/- 13.0 -6.93 +/- 13.6 July 13 0.51 +/- 22.9 0.51 +/- 22.8 0.49 +/- 22.1 0.50 +/- 22.7 -0.39 +/- 10.5 -0.38 +/- 10.2 -0.38 +/- 10.3 -0.40 +/- 10.8 July 19 10.9 +/- 17.3 10.8 +/- 17.2 11.4 +/- 18.1 11.7 +/- 18.5 0.18 +/- 10.4 0.18 +/- 10.2 0.18 +/- 10.3 0.19 +/- 10.7 July 27 -6.77 +/- 16.5 -6.74 +/- 16.4 -6.69 +/- 16.3 -6.83 +/- 16.7 -0.85 +/- 16.7 -0.83 +/- 16.2 -0.85 +/- 16.5 -0.86 +/- 16.9 August 3 -0.14 +/- 12.2 -0.14 +/- 12.2 -0.14 +/- 12.4 -0.15 +/- 12.5 4.60 +/- 10.7 3.00 +/- 6.98 4.54 +/- 10.6 4.74 +/- 11.0 August 9 4.46 +/- 12.2 4.85 +/- 13.2 4.53 +/- 12.4 4.67 +/- 12.7 0.00 +/- 13.3 0.00 +/- 13.1 0.00 +/- 13.3 0.00 +/- 14.0 August17 -13.4 +/- 9.87 -13.3 +/- 9.77 -13.9 +/- 10.3 -14.2 +/- 10.5 2.70 +/- 10.2 2.62 +/- 9.91 2.63 +/- 10.0 2.73 +/- 10.4 August 23 1.71 +/- 9.73 1.74 +/- 9.90 1.78 +/- 10.1 1.81 +/- 10.3 -0.41 +/- 5.91 -0.43 +/- 6.30 -0.40 +/- 5.78 -0.42 +/- 6.03 August 31 0.14 +/- 8.80 0.14 +/- 8.76 0.14 +/- 9.09 0.14 +/- 9.24 -7.24 +/- 16.8 -7.09 +/- 16.5 -7.16 +/- 16.7 -7.34 +/- 17.1 September 7 0.44 +/- 13.1 0.45 +/- 13.1 0.46 +/- 13.6 0.47 +/- 13.8 -2.76 +/- 10.6 -2.71 +/- 10.4 -2.71 +/- 10.4 -2.85 +/- 11.0 September 13 -3.97 +/- 19.8 -3.96 +/- 19.7 -4.03 +/- 20.1 -4.14 +/- 20.6 7.72 +/- 12.0 7.59 +/- 11.8 7.58 +/- 11.8 7.97 +/- 12.4 September 21 -5.67 +/- 9.72 -5.64 +/- 9.67 -5.85 +/- 10.0 -5.95 +/- 10.2 -3.69 +/- 9.07 -3.03 +/- 7.45 -3.63 +/- 8.93 -3.74 +/- 9.19 September 28 -6.85 +/- 15.6 -6.79 +/- 15.5 -6.68 +/- 15.2 -6.80 +/- 15.5 -3.45 +/- 10.8 -2.83 +/- 8.90 -3.36 +/- 10.6 -3.56 +/- 11.2 October 5 7.48 +/- 19.0 7.40 +/- 18.8 7.91 +/- 20.1 7.94 +/- 20.2 6.71 +/- 15.7 6.57 +/- 15.4 3.11 +/- 7.28 6.85 +/- 16.0 October 12 -10.2 +/- 8.96 -10.1 +/- 8.88 -10.3 +/- 9.03 -10.5 +/- 9.25 3.81 +/- 9.21 3.74 +/- 9.05 3.77 +/- 9.12 3.90 +/- 9.45 October 19 -9.41 +/- 15.9 -9.44 +/- 15.9 -9.65 +/- 16.3 -9.88 +/- 16.6 -11.9 +/- 17.7 -11.6 +/- 17.3 -11.7 +/- 17.5 -12.2 +/- 18.2 October 26 0.08 +/- 16.4 0.08 +/- 16.6 0.08 +/- 16.9 0.08 +/- 17.2 -0.61 +/- 7.28 -0.59 +/- 7.11 -0.60 +/- 7.22 -0.62 +/- 7.39 November 2 -6.62 +/- 16.2 -6.60 +/- 16.1 -6.46 +/- 15.8 -6.52 +/- 16.0 18.3 +/- 23.3 17.9 +/- 22.8 18.0 +/- 23.0 18.7 +/- 23.8 November 9 -13.0 +/- 24.6 -13.0 +/- 24.6 -13.7 +/- 25.8 -13.9 +/- 26.2 -7.14 +/- 27.9 -6.95 +/- 27.1 -7.04 +/- 27.5 -7.38 +/- 28.8 November 16 1.82 +/- 8.91 1.81 +/- 8.86 1.87 +/- 9.19 1.91 +/- 9.37 -2.83 +/- 9.74 -1.42 +/- 4.89 -2.80 +/- 9.63 -2.93 +/- 10.1 November 23 -6.99 +/- 25.9 -6.99 +/- 25.9 -7.23 +/- 26.8 -7.30 +/- 27.0 -39.8 +/- 27.9 -39.1 +/- 27.4 -39.1 +/- 27.4 -40.9 +/- 28.7 November 30 -2.57 +/- 10.3 -2.57 +/- 10.3 -2.65 +/- 10.6 -2.70 +/- 10.8 6.67 +/- 12.3 6.58 +/- 12.1 6.57 +/- 12.1 6.83 +/- 12.6 December? -4.12 +/- 16.3 -4.11 +/- 16.3 -4.24 +/- 16.8 -4.27 +/- 16.9 -6.50 +/- 16.5 -6.36 +/- 16.2 -6.39 +/- 16.2 -2.82 +/- 7.15 December 14 -5.08 +/- 17.5 -5.05 +/- 17.4 -5.24 +/- 18.1 -5.32 +/- 18.4 1.87 +/- 11.3 1.84 +/- 11.1 1.83 +/- 11.1 1.92 +/- 11.6 December 21 4.35 +/- 10.4 4.32 +/- 10.4 4.46 +/- 10.7 4.52 +/- 10.8 -5.81 +/- 11.8 -5.71 +/- 11.6 -5.73 +/- 11.6 -5.78 +/- 11.7 December28 -11.5 +/- 11.7 -11.4 +/- 11.6 -11.7 +/- 12.0 -12.0 +/- 12.2 -15.6 +/- 11.2 -10.1 +/- 7.25 -15.5 +/- 11.1 -15.1 +/- 10.9 A= <MDC 32

I Surry Nuclear Power Station Surry County, Virginia Annual Radiological Environmental Operating Report 2021 I TABLE 3-5 AIR PARTICULATES GAMMA EMITTER CONCENTRATIONS I SAMPLING (1.0E-a pCi/m 3 +/- 2 Sigma)

LOCATIONS Nuclide 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Avg. +/- 2s.d.

I ss Cs-134 Cs-137

-0.25 +/- 0.50 0.18 +/- 0.45

-0.16 +/- 0.88

-0.08 +/- 0.73

-0.63 +/- 0.75

-0.25 +/- 0.62 0.03 +/- 1.07

-0.74 +/- 0.90 Be-7 122 +/- 20.5 150 +/- 26.3 143 +/- 20.5 130 +/- 28.6 136 +/- 24.4 I HIR Cs-134 0.01 +/- 0.54 0.30 +/- 0.62 0.26 +/- 0.62 -0.16 +/- 0.75 Cs-137 -0.07 +/- 0.56 0.26 +/- 0.62 0.11 +/- 0.67 0.09 +/- 0.69 I Be-7 86.9 +/- 19.1 104 +/- 18.0 107 +/- 24.4 151 +/- 24.0 112 +/- 55.1 BC Cs-134 -0.60 +/- 0.74 -0.52 +/- 0.72 -0.33 +/- 0.86 -0.32 +/- 0.79 I Cs-137 Be-7

-0.25 +/- 0.56 122 +/- 21.1 0.03 +/- 0.59 137 +/- 26.6

-0.50 +/- 0.75 138 +/- 22.7

-0.36 +/- 0.64 142 +/- 20.0 135 +/- 17.3 I ALL Cs-134 Cs-137 Be-7

-0.59 +/- 0.76 0.36 +/- 0.82 123 +/- 22.5

-0.11 +/- 1.06

-0.28 +/- 0.86' 0.81 +/- 1.26

-0.21 +/- 0.91

-0.30 +/- 0.73 0.19 +/- 0.69 136 +/- 36.6 120 +/- 30.8 120 +/- 23.2 125 +/- 15.7 I CP Cs-134 -1.06 +/- 0.92 -0.20 +/- 0.65 -0.09 +/- 0.51 -0.06 +/- 0.76 Cs-137 0.90 +/- 0.67 A -0.10 +/- 0.54 0.13 +/- 0.42 0.32 +/- 0.75 I Be-7 144 +/- 23.7 139 +/- 22.5 147 +/- 19.0 128 +/- 22.2 139 +/- 16.5 BASF Cs-134 0.45 +/- 0.99 0.21 +/- 1.06 -0.34 +/- 0.57 0.09 +/- 0.46 I Cs-137 Be-7

-1.09 +/- 1.08 130 +/- 27.5

-0.54 +/- 0.99 143 +/- 25.9

-0.12 +/- 0.60 139 +/- 22.3 0.07 +/- 0.40 157 +/- 20.6 142 +/- 22.1 I FE Cs-134 Cs-137 Be-7

-0.28 +/- 0.70

-0.03 +/- 0.57 168 +/- 21.8 0.08 +/- 0.75

-0.33 +/- 0.55 169 +/- 24.2 0.30 +/- 0.85

-0.31 +/- 0.91 196 +/- 30.8

-0.90 +/- 1.04 0.81 +/- 0.97 212 +/- 30.9 186 +/- 43.1 I NN-C Cs-134 Cs-137

-0.21 +/- 0.63 0.09 +/- 0.60

-0.13 +/- 0.51 0.19 +/- 0.52

-0.46 +/- 0.90 0.27 +/- 0.65

-0.18 +/- 0.77

-0.24 +/- 0.49 Be-7 129 +/- 24.4 140 +/- 18.6 127 +/- 20.3 144 +/- 22.9 135 +/- 16.8 I A= <MDC I

I I

I 33 I

I Surry Nuclear Power Station Surry County, Virginia Annual Radiological Environmental Operating Report 2021 I TABLE 3-6 MILK GAMMA EMMITER AND STRONTIUM CONCENTRATIONS I (pCi/Liter +/- 2 Sigma)

COLONIAL BEACHY FARM-C NUCLIDE EPPS PARKWAY I JANUARY Cs-134 -1.68 +/- 5.87 0.33 +/- 5.75 -1.32 +/- 5.90 Cs-137 -0.92 +/- 6.36 0.38 +/- 5.35 2.85 +/- 6.11 I Ba-140 La-140 1-131 15.1

-1.98 0.11

+/-

26.1 8.31 0.51 7.33 0.18 0.10

+/-

24.5 6.43 0.54

-17.0

-4.93

-0.63

+/-

27.6 5.60 0.48 K-40 1308 +/- 185 1142 +/- 188 1077 +/- 210 I FEBRUARY Cs-134 -2.06 +/- 4.12 2.10 +/- 4.71 -0.16 +/- 4.09 I Cs-137 Ba-140 La-140 0.88 0.67 1.25

+/-

3.81 14.0 3.57

-1.89

-2.13

-1.23

+/-

5.16 15.6 5.35 2.41

-0.43 1.00

+/-

4.17 12.1 4.82 1-131 0.03 +/- 0.52 -0.28 +/- 0.41 0.03 +/- 0.47 I K-40 1302 +/- 154 1209 +/- 183 1038 +/- 160 MARCH I Cs-134 Cs-137 Ba-140

-0.36

-2.79

+/-

5.38 5.23 18.6

-3.37

-2.66

-21.1

+/-

5.30 4.81 24.4 0.20

-0.49 9.57

+/-

4.50 4.95 17.9 4.11 I La-140 1-131 K-40

-2.47 0.09 1138

+/-

6.84 0.52 192

-3.59 0.16 1155

+/-

5.50 0.47 170

-0.03 0.37 1140

+/-

4.87 0.52 145 Sr-89 3.38 +/- 2.45 A I Sr-90 1.87 +/- 0.63 APRIL I Cs-134 Cs-137 Ba-140

-3.57 0.07

-9.89

+/-

5.16 5.86 16.9

-1.82 1.51

-3.78

+/-

5.21 4.81 17.5

-1.01 4.48

-3.51

+/-

4.54 5.72 15.0 La-140 -2.28 +/- 4.49 1.56 +/- 4.04 -5.42 +/- 6.13 I 1-131 K-40

-0.20 1301

+/-

0.42 191 0.42 1237

+/-

0.56 174 0.56 1115

+/-

0.60 174 I MAY Cs-134 Cs-137 1.56 1.67

+/-

5.27 4.67 1.20 1.95

+/-

5.58 5.69 2.55 4.78

+/-

4.83 4.54 A Ba-140 0.24 +/- 18.2 2.02 +/- 17.8 6.71 +/- 16.4 I La-140 1-131 K-40

-3.68

-0.29 1053

+/-

4.67 0.49 159

-2.55 0.03 1306

+/-

6.55 0.50 190 1.44 0.00 998

+/-

4.41 0.52 A 167 I

I *Sr-89/90 analysis performed quarterly on location Colonial Parkway only.

A=<MDC I

34 I

I Surry Nuclear Power Station Surry County, Virginia Annual Radiological Environmental Operating Report 2021 I TABLE3-6 MILK GAMMA EMMITER AND STRONTIUM CONCENTRATIONS I (pCi/Liter +/- 2 Sigma)

COLONIAL BEACHY NUCLIDE EPPS PARKWAY FARM-C I JUNE Cs-134 3.52 +/- 5.53 0.10 +/- 5.59 1.19 +/- 4.96 Cs-137 1.45 +/- 6.31 3.45 +/- 5.83 1.98 +/- 5.01 I Ba-140 La-140 1-131 1.76 3.44

-0.39

+/-

18.4 5.66 0.43 7.72

-5.08 0.24

+/-

15.2 7.49 0.49

-7.36

-1.63 0.07

+/-

21.4 4.95 0.51 K-40 989 +/- 170 1276 +/- 206 1249 +/- 176 I Sr-89 Sr-90

-2.51 1.83

+/-

2.41 0.69 I JULY Cs-134 Cs-137 1.65 0.04

+/-

4.82 3.99 0.58 2.59

+/-

4.96 4.76

-1.82

-0.33

+/-

4.94 5.50 Ba-140 -11.8 +/- 14.6 9.14 +/- 15.7 -9.59 +/- 17.6 I La-140 1-131 K-40 0.69

-0.24 1245

+/-

4.39 0.47 157

-1.53 0.43 1001

+/-

3.15 0.56 131 7.67 0.31 1275

+/-

6.48 A 0.33 193 I AUGUST Cs-134 4.20 +/- 4.39 -2.68 +/- 5.67 0.93 +/- 5.49 I Cs-137 Ba-140 La-140 3.42 10.0

-2.45

+/-

4.17 13.3 3.72 4.13 2.15

-1.01

+/-

6.02 20.1 5.90 0.99 6.87 0.97

+/-

4.54 16.1 4.62 1-131 0.35 +/- 0.53 -0.20 +/- 0.47 0.01 +/- 0.50 I K-40 1123 +/- 150 1234 +/- 194 1131 +/- 171 SEPTEMBER I Cs-134 Cs-137 Ba-140

-2.04 0.56

-11.4

+/-

4.71 4.18 13.5

-2.00

-0.14

-8.99

+/-

4.77 5.13 20.2 0.31 6.06

-27.2

+/-

6.39 6.00 A 28.8 La-140 0.98 +/- 4.63 1.70 +/- 5.30 -1.29 +/- 7.98 I 1-131 K-40 Sr-89

-0.36 1217

+/-

0.45 149 0.44 1187 3.83

+/-

0.54 205 2.81 A 0.34 1255

+/-

0.52 203 Sr-90 2.06 +/- 0.84 I OCTOBER Cs-134 0.02 +/- 6.16 -4.60 +/- 7.29 0.69 +/- 5.33 I Cs-137 Ba-140 La-140

-5.02

-0.56

-2.97

+/-

4.66 20.3 5.27 4.45

-11.3 0.85

+/-

6.27 24.7 7.38 2.24 4.44 0.06

+/-

4.42 15.6 5.61

-0.28 +/- 0.50 0.13 +/- 0.50 I

1-131 0.49 +/- 0.47 A K-40 1033 +/- 171 1172 +/- 178 1214 +/- 160 I

Sr-89/90 analysis performed quarterly on location Colonial Parkway only.

I. A= <MDC 35 I

I Surry Nuclear Power Station Surry County, Virginia Annual Radiological Environmental Operating Report 2021 I (pCi/Liter +/- 2 Sigma)

COLONIAL BEACHY NUCLIDE EPPS PARKWAY FARM-C I NOVEMBER Cs-134 2.68 +/- 4.17 2.80 +/- 6.16 0.42 +/- 2.91 Cs-137 2.57 +/- 3.70 2.94 +/- 5.21 -1.84 +/- 2.69 I Ba-140 La-140 1-131 4.87 4.55 0.31

+/- 17.0

+/- 7.01

+/- 0.55

-21.8

-1.66

-0.08

+/- 20.4

+/- 6.63

+/- 0.46

-3.70 0.50

-0.02

+/- 13.2

+/- 3.70

+/- 0.47 K-40 987 +/- 150 1134 +/- 182 1344 +/- 148 I DECEMBER Cs-134 -6.63 +/- 5.96 3.30 +/- 5.47 1.73 +/- 5.96 I Cs-137 Ba-140 La-140 1.39

-0.11

-2.86

+/- 5.32

+/- 18.8

+/- 5.02 2.21 12.1 0.74

+/- 5.92

+/- 18.0

+/- 6.55

-0.33 1.35 2.14

+/- 5.95

+/- 20.0

+/- 4.43 1-131 0.55 +/- 0.45 A -0.19 +/- 0.44 0.65 +/- 0.52 A I K-40 Sr-89 Sr-90 1484 +/- 209 1177 2.93 1.26

+/- 185

+/- 2.74 A

+/- 0.69 984 +/- 172 I

I I

I I *Sr-89/90 analysis performed quarterly on location Colonial Parkway only.

A=<MDC I

I 36 I

I Surry Nuclear Power Station Surry County, Virginia Annual Radiological Environmental Operating Report 2021 I TABLE 3-7 FOOD PRODUCTS GAMMA EMMITER CONCENTRATIONS I SAMPLING COLLECTION SAMPLE (pCi/kg (wet) +/- 2 Sigma)

NUCLIDE LOCATIONS DATE TYPE I BROCK 11/16/2021 CORN Cs-134

-0.19 +/- 7.94 Cs-137 2.79 +/- 7.26 1-131 0.95 +/- 8.40 K-40 2202 +/- 328 FARM 11/16/2021 PEANUTS 7.83 +/- 15.2 10.3 +/- 15.0 1.81 +/- 15.7 6317 +/- 646 I Cs-134 Cs-137 1-131 K-40 SLADE 11/16/2021 SOYBEANS -5.11 +/- 19.5 -0.93 +/- 15.9 -14.0 +/- 15.2 19670 +/- 974 I FARM I

I I

A= <MDC I

37 I

I Surry Nuclear Power Station Surry County, Virginia Annual Radiological Environmental Operating Report 2021 I TABLE 3-8 WELL WATER GAMMA EMMITER AND TRITIUM CONCENTRATIONS (pCi/Liter +/- 2 Sigma)

I SAMPLING LOCATIONS COLLECTION DATE NUCLIDE I ss 3/8/2021 6/1/2021 917/2021 Mn-54 2.37

-1.04

-0.71

+/- 2.56

+/- 4.13

+/- 3.40 1.51 0.63 2.20 Co-58

+/- 2.49

+/- 3.72

+/- 3.84

-4.44

-1.97

-0.08 Fe-59

+/- 4.32

+/- 5.14

+/- 9.03 0.00

-0.64 0.70 Co-60

+/- 1.72

+/- 3.91

+/- 3.20

-7.96

-6.27

-11.0 Zn-65

+/- 6.43

+/- 8.62

+/- 11.6 12/8/2021 -2.66 +/- 3.89 0.64 +/- 3.52 0.69 +/- 6.81 2.57 +/- 5.28 -8.17 +/- 8.80 I 3/8/2021 0.79 Nb-95

+/- 2.60 0.28 Zr-95

+/- 4.25 0.27 1-131

+/- 0.56 Cs-134 2.35 +/- 2.92 Cs-137 0.73 +/- 2.52 6/1/2021 1.42 +/- 3.11 -0.60 +/- 6.41 0.50 +/- 0.59 -1.16 +/- 3.79 -2.23 +/- 3.43 I 9/7/2021 12/8/2021 0.43

-1.72

+/- 4.14

+/- 3.92 Ba-140

-1.41 5.42

+/- 6.38

+/- 6.22 La-140 0.38 0.05

+/- 0.50

+/- 0.52 H-3 2.25

-3.60

+/- 4.27

+/- 4.34

-0.04 0.00

+/- 4.41

+/- 4.32 I

3/8/2021 -0.02 +/- 8.64 -0.55 +/- 3.69 -18.9 +/- 387 6/1/2021 6.54 +/- 11.3 -0.87 +/- 5.18 374 +/- 602 9/7/2021 -10.8 +/- 12.1 1.45 +/- 3.58 222 +/- 589 12/8/2021 -11.4 +/- 14.5 1.04 +/- 4.84 -704 +/- 557 I HIR 3/8/2021

-1.20 Mn-54 2.23 +/- 2.38

+/- 3.75 Co-58 0.22 +/- 1.97 -0.98 Fe-59

+/- 4.36 -1.60 Co-60

+/- 2.66 Zn-65 1.07

-0.60

+/- 5.18

+/- 7.88 6/1/2021 -4.33 +/- 3.52 1.70 +/- 7.35 0.85 +/- 3.57 9/7/2021 -1.18 +/- 3.79 0.13 +/- 2.76 2.40 +/- 7.62 1.50 +/- 3.59 -0.97 +/- 9.53 I 12/8/2021 -1.35 +/- 4.48 Nb-95

-0.85 +/- 4.33 Zr-95 1.77 +/- 6.63 1-131

-1.76 +/- 4.23 Cs-134

-1.29 +/- 7.90 Cs-137 3/8/2021 1.37 +/- 2.27 -2.40 +/- 4.28 -0.02 +/- 0.46 -1.17 +/- 2.73 -1.30 +/- 2.71 I 6/1/2021 917/2021 12/8/2021 1.67

-2.22 2.18

+/- 3.69

+/- 3.76

+/- 4.19

-6.35

-2.50 0.63

+/- 6.22

+/- 7.23

+/- 5.72

-0.29 0.35 0.11

+/- 0.50

+/- 0.51

+/- 0.31 1.31 0.60 0.32

+/- 3.43

+/- 3.88

+/- 4.95

-5.04 0.03 5.27

+/- 3.78

+/- 3.88

+/- 4.97 A Ba-140 La-140 H-3 I 3/8/2021 6/1/2021 917/2021

-2.21 8.61 4.21

+/- 10.3

+/- 13.1

+/- 14.2

-1.30

-0.36 1.94

+/- 3.38

+/- 4.42

+/- 3.93 95.0

-317 6.31

+/- 398

+/- 553

+/- 572 12/8/2021 -7.87 +/- 15.3 0.20 +/- 5.55 -336 +/- 583 I TC 3/8/2021 Mn-54 2.07 +/- 3.98 Co-58

-3.06 +/- 3.74 -5.02 Fe-59

+/- 8.25 Co-60 2.49 +/- 4.66 -2.09 Zn-65

+/- 9.65 6/1/2021 -1.14 +/- 3.82 2.56 +/- 3.20 -2.12 +/- 7.02 2.57 +/- 3.21 -0.83 +/- 8.44 I 9/7/2021 12/8/2021

-0.64 2.31

+/- 4.29

+/- 4.04

-1.73

-0.46

+/- 4.37

+/- 3.74 2.19

-0.53

+/- 7.83

+/- 6.87

-0.64 0.60

+/- 3.23

+/- 3.98

-14.0

-23.5

+/- 11.9

+/- 13.6 Nb-95 Zr-95 1-131 Cs-134 Cs-137 I 3/8/2021 6/1/2021 917/2021 0.04

-0.48 1.12

+/- 4.51

+/- 3.26

+/- 3.87

-2.05 4.82 7.80

+/- 7.21

+/- 6.63

+/- 7.26 A 0.58 0.41 0.04

+/- 0.54 A

+/- 0.55

+/- 0.50

-2.12 1.80 0.33

+/- 4.24

+/- 3.02

+/- 4.99

-0.79

-4.07

-2.27

+/- 4.67

+/- 3.89

+/- 3.73 12/8/2021 2.06 +/- 4.54 2.67 +/- 5.92 0.51 +/- 0.36 A 0.77 +/- 4.32 -2.28 +/- 3.85 I 3/8/2021 6/1/2021

-3.31 Ba-140 11.0

+/- 16.9

+/- 11.7 La-140

-3.94 0.82

+/- 4.82

+/- 4.81

-34.7 278 H-3

+/- 404

+/- 595 9/7/2021 -6.31 +/- 17.2 -1.56 +/- 6.57 -50.5 +/- 568 I 12/8/2021 -0.22 +/- 13.5 1.96 +/- 6.10 108 +/- 616 I

I A= <MDC 38 I

I Surry Nuclear Power Station Surry County, Virginia Annual Radiological Environmental Operating Report 2021 I TABLE 3-9 RIVER WATER GAMMA EMITTER AND TRITIUM CONCENTRATIONS (pCi/Liter +/- 2 Sigma)

I SAMPLING LOCATIONS COLLECTION DATE NUCLIDE I SD 1/12/2021 2/2/2021

-0.94

-4.27 Mn-54

+/- 3.10

+/- 4.16 -1.43 Co-58 1.32 +/- 2.83

+/- 4.01

-0.06

-2.67 Fe-59

+/- 6.49

+/- 7.53 0.01 1.92 Co-60

+/- 2.99

+/- 4.75 Zn-65

-1.71

-4.59

+/- 6.47

+/- 9.03 3/2/2021 0.83 +/- 2.78 -0.14 +/- 2.56 -0.44 +/- 4.83 0.14 +/- 1.74 -0.68 +/- 4.64 I 4/6/2021 5/4/2021 6/1/2021

-2.29 1.26

-3.39

+/- 4.10

+/- 2.65

+/- 3.32

-1.31 0.10 0.24

+/- 4.08

+/- 2.48

+/- 3.68

-5.97 2.06

-1.12

+/- 7.12

+/- 6.19

+/- 5.80

-0.28 0.04 0.28

+/- 5.35

+/- 2.72

+/- 3.69 0.24 2.12

-7.14

+/- 6.87

+/- 5.56

+/- 9.10 I +/- 3.97 +/- 3.63 +/- 8.17 7/7/2021 3.55 -1.25 1.62 -2.73 +/- 3.89 1.30 +/- 8.63 8/3/2021 2.10 +/- 3.14 0.90 +/- 3.76 -3.95 +/- 8.58 -3.61 +/- 4.61 -0.38 +/- 7.77 917/2021 2.02 +/- 3.86 1.53 +/- 3.85 -5.43 +/- 8.25 -0.24 +/- 3.42 -2.79 +/- 8.11 10/5/2021 0.61 +/- 3.17 1.89 +/- 3.54 6.36 +/- 6.58 -0.93 +/- 3.50 -8.85 +/- 7.72 I 11/2/2021 12/7/2021

-1.28

-1.26

+/- 3.29

+/- 2.62

-0.40 0.19

+/- 3.29

+/- 2.06

-0.70

-1.30

+/- 6.74

+/- 4.63

-0.09

-2.47

+/- 3.51

+/- 2.69

-6.60

-4.31

+/- 7.34

+/- 5.44 Nb-95 Zr-95 1-131 Cs-134 Cs-137 I 1/12/2021 2/2/2021 3/2/2021 4.00 2.29 3.22

+/- 3.54 A

+/- 3.63

+/- 2.91 A 0.58

-1.16 1.16

+/- 5.90

+/- 6.83

+/- 3.94

-0.62 0.73 1.93

+/- 4.83

+/- 4.73

+/- 4.09 1.25 1.50

-1.54

+/- 3.09

+/- 4.63

+/- 3.21

-2.11 0.70

-2.49

+/- 3.05

+/- 4.40

+/- 2.74 4/6/2021 -0.20 +/- 3.89 -3.13 +/- 6.26 0.16 +/- 4.66 3.51 +/- 4.18 -0.06 +/- 4.36 I 5/4/2021 6/1/2021 717/2021 2.67 3.78 0.45

+/- 2.72

+/- 3.01 A

+/- 3.52 2.05 1.69 7.31

+/- 4.37

+/- 6.08

+/- 8.07

-3.87 3.26 4.53

+/- 4.04

+/- 4.36

+/- 3.88 A

-0.69

-2.82

-2.71

+/- 3.16

+/- 3.62

+/- 3.73 1.07

-1.17

-5.73

+/- 2.90

+/- 3.67

+/- 4.74 8/3/2021 1.87 +/- 3.77 3.55 +/- 7.03 3.83 +/- 4.53 3.16 +/- 4.31 -2.04 +/- 4.08 I 917/2021 10/5/2021 11/2/2021 2.72

-0.32 1.38

+/- 3.41

+/- 4.03

+/- 3.23

-0.76

-4.39 3.83

+/- 6.15

+/- 5.40

+/- 6.23 3.19

-1.39

-5.14

+/- 3.94

+/- 4.39

+/- 4.99 2.31

-1.03 0.89

+/- 4.50

+/- 3.49

+/- 3.82 2.63 2.64 1.24

+/- 4.20

+/- 4.08

+/- 3.86 12/7/2021 -0.97 +/- 2.61 -2.63 +/- 4.68 0.19 +/- 3.01 -0.95 +/- 2.77 -1.42 +/- 2.94 I 1/12/2021 Ba-140 3.15 +/- 14.4 La-140 3.35 +/- 4.91 H-3 K-40 TH-228 12.8 +/- 7.00 2/2/2021 6.32 +/- 17.0 2.92 +/- 5.34 I 3/2/2021 4/6/2021 5/4/2021 9.48 0.16

-12.9

+/- 12.2

+/- 11.9

+/- 12.6 2.95 0.93

-1.25

+/- 3.90

+/- 5.46

+/- 3.87

-511 +/- 556 6/1/2021 7.79 +/- 13.0 -3.43 +/- 4.68 266 +/- 435 I 717/2021 8/3/2021 7.02

-9.30

+/- 13.1

+/- 15.1 1.19

-3.35

+/- 5.26

+/- 5.94 86.3 +/- 75.2 89.7 +/- 77.5 917/2021 4.18 +/- 13.4 3.28 +/- 4.62 -20.4 +/- 445 115 +/- 80.3 I 10/5/2021 11/2/2021 12/7/2021

-1.19

-14.5 5.27

+/- 14.2

+/- 15.1

+/- 9.53 4.66

-2.26

-0.47

+/- 4.57 A

+/- 6.57

+/- 3.15 459 +/- 641 90.4 +/- 73.2 113 +/- 68.5 I

A= <MDC I

I I

39 I

I Surry Nuclear Power Station Surry County, Virginia Annual Radiological Environmental Operating Report 2021 I TABLE 3-9 RIVER WATER GAMMA EMITTER AND TRITIUM CONCENTRATIONS (pCi/Liter +/- 2 Sigma)

I SAMPLING LOCATIONS COLLECTION DATE NUCLIDE I SW-C 1/12/2021 2/2/2021 0.24

-1.69 Mn-54

+/- 2.65

+/- 3.51 Co-58 0.37

-1.89

+/- 3.10

+/- 3.54 3.91 5.24 Fe-59

+/- 5.32

+/- 7.27 Co-60 1.02 0.90

+/- 3.14

+/- 3.17

-5.44

-13.3 Zn-65

+/- 6.24

+/- 7.90 3/2/2021 -2.03 +/- 3.71 0.14 +/- 3.29 -4.39 +/- 8.79 0.13 +/- 3.89 -6.74 +/- 8.73 I 4/6/2021 5/4/2021 6/1/2021 2.68 0.25 0.29

+/- 4.20

+/- 2.84

+/- 2.74

-1.64

-0.23 1.81

+/- 3.84

+/- 2.91

+/- 2.19

-4.91 1.81 0.58

+/- 6.62

+/- 5.47

+/- 4.29 0.52

-2.32 1.36

+/- 3.99

+/- 3.25

+/- 2.14

-4.05

-1.20 2.34

+/- 6.76

+/- 6.38

+/- 4.87 I 717/2021 8/3/2021 917/2021 0.50 2.52 1.99

+/- 2.23

+/- 3.71

+/- 3.72

-0.99 1.26

-0.47

+/- 2.23

+/- 3.68

+/- 3.26 2.28 4.95 4.06

+/- 4.31

+/- 8.07

+/- 6.10

-1.20

-1.56 0.84

+/- 2.33

+/- 3.73

+/- 3.32

-11.3

-3.53

-6.03

+/- 5.24

+/- 8.07

+/- 7.26 10/5/2021 0.65 +/- 3.04 1.40 +/- 3.06 -4.50 +/- 8.91 -2.23 +/- 4.05 -7.39 +/- 9.60 I 11/2/2021 12/7/2021

-3.29 2.59

+/- 3.78

+/- 3.18

-2.42

-0.83

+/- 3.30

+/- 3.02

-2.23

-3.26

+/- 5.99

+/- 6.76 3.33 1.03

+/- 3.42

+/- 3.36

-7.97 0.15

+/- 9.42

+/- 9.17 Nb-95 Zr-95 1-131 Cs-134 Cs-137 I 1/12/2021 2/2/2021 3/2/2021 2.44 0.71 0.83

+/- 2.71

+/- 3.10

+/- 3.59

-3.26

-1.57

-4.06

+/- 5.27

+/- 5.39

+/- 5.71 6.55

-0.76

-0.42

+/- 5.19 A

+/- 4.16

+/- 5.46

-3.47 2.31 1.27

+/- 3.03

+/- 3.20

+/- 3.82 0.16 0.43 6.96

+/- 2.91

+/- 3.67

+/- 4.28 A 4/6/2021 -2.49 +/- 3.66 3.89 +/- 7.26 -0.55 +/- 4.20 1.06 +/- 4.13 -1.37 +/- 4.08 I 5/4/2021 6/1/2021 717/2021

-4.08 0.77 1.41

+/- 2.74

+/- 1.98

+/- 2.36 0.37 4.45

-1.79

+/- 5.73

+/- 3.83 A

+/- 3.87 3.53

-1.15 0.32

+/- 4.98

+/- 2.72

+/- 2.65

-0.65

-0.22

-0.73

+/- 3.54

+/- 2.21

+/- 2.44 0.37

-1.41

-0.73

+/- 2.87

+/- 2.56

+/- 2.35 8/3/2021 1.64 +/- 3.38 -4.45 +/- 5.97 2.36 +/- 4.35 0.33 +/- 3.97 -2.49 +/- 3.52 I 917/2021 10/5/2021 11/2/2021 0.11

-1.91 0.27

+/- 3.75

+/- 3.86

+/- 3.23 0.48 0.38

-0.48

+/- 6.73

+/- 5.76

+/- 5.01

-0.66 0.07 0.89

+/- 4.23

+/- 3.89

+/- 4.58 2.61

-0.10 0.54

+/- 4.35

+/- 3.16

+/- 3.70 0.02 3.80

-1.01

+/- 3.73

+/- 4.72

+/- 3.64 12/7/2021 0.95 +/- 3.43 -3.71 +/- 5.75 -1.93 +/- 4.31 -1.18 +/- 3.79 -0.71 +/- 3.87 I 1/12/2021 Ba-140 7.20 +/- 14.3 -1.59 La-140

+/- 4.43 H-3 K-40 TH-228 2/2/2021 4.95 +/- 11.5 3.37 +/- 3.72 I 3/2/2021 4/6/2021 5/4/2021

-6.48 3.36 2.29

+/- 17.5

+/- 15.7

+/- 12.9 4.65

-3.05

-3.15

+/- 6.08

+/- 4.13

+/- 5.71 128 +/- 602

-3.04 +/- 2.82 -38.2 +/- 405 I 6/1/2021 717/2021 8/3/2021 4.10 3.38 3.57

+/- 8.40

+/- 8.50

+/- 12.4 0.43

-3.98

+/- 2.86

+/- 5.71 74.0 +/- 51.7 8.24 +/- 4.74 917/2021 -0.25 +/- 14.1 -2.13 +/- 4.45 15.5 +/- 453 I 10/5/2021 11/2/2021 12/7/2021

-3.56 9.41 4.40

+/- 12.3

+/- 17.4

+/- 12.0 1.34

-2.56 1.24

+/- 4.79

+/- 4.89

+/- 4.19 -153 +/- 600 I

A= <MDC I

I I

40 I

I Surry Nuclear Power Station Surry County, Virginia Annual Radiological Environmental Operating Report 2021 I TABLE 3-10 SEDIMENT SILT GAMMA EMITTER CONCENTRATIONS I SAMPLING COLLECTION (pCi/kg (dry) +/- 2 Sigma)

NUCLIDE LOCATIONS DATE I SD 3/25/2021 Cs-134 32.6 +/- 58.0 Cs-137 140 +/- 70.4 8 K-40 12420 +/- 1696 Th-228 754 +/- 229 9/15/2021 124 +/- 55.8 A 106 +/- 63.2 A 18790 +/- 1993 1024 +/- 162 I 3/25/2021 Th-232 1124 +/- 241 Ra-226 Be-7 9/15/2021 1170 +/- 215 1990 +/- 1453 2084 +/- 1179 I

Cs-134 Cs-137 K-40 Th-228 I 51 3/17/2021 9/15/2021

-13.1 +/- 80.7 28.2 +/- 70.1 220 +/- 91.7 117 +/- 76.1 A 14740 +/- 2273 15790 +/- 2185 1245 +/- 176 1220 +/- 262 Th-232 Be-7 Ac-228 I 3/17/2021 9/15/2021 1062 +/- 324 1623 +/- 1055 1234 +/- 400 I Cs-134 Cs-137 K-40 Th-228 1220 +/- 218 CHIC-C 3/17/2021 67.8 +/- 81.1 55.1 +/- 77.9 14730 +/- 1968 I 9/14/2021 24.9 +/- 65.0 Th-232 104 +/- 72.7 Ra-226 A 15730 +/- 2022 1291 +/- 171 3/17/2021 1111 +/- 235 I 9/14/2021 1171 +/- 240 3469 +/- 2123 I

I I

I A=<MDC I B= The analyte was not detected. Peak not identified, but forced activity concentration exceeds MDC and 2 sigma.

41 I

I Surry Nuclear Power Station Surry County, Virginia Annual Radiological Environmental Operating Report 2021 I TABLE 3-11 SHORELINE SEDIMENT GAMMA EMITTER CONCENTRATIONS (pCi/kg (dry)+/- 2 Sigma)

I SAMPLING COLLECTION NUCLIDE LOCATIONS DATE I HIR 2/9/2021 Cs-134

-3.56 +/- 19.9 Cs-137

-5.38 +/- 18.9 K-40 6145 +/- 810 Th-228 61.3 +/- 34.6 8/3/2021 2.67 +/- 27.0 -4.03 +/- 24.6 4260 +/- 927 98.5 +/- 51.6 I

I Cs-134 Cs-137 K-40 Th-228 Th-232 I CHIC-C 2/23/2021 8/3/2021 1.87 +/- 16.1 43.0 +/- 39.4 A 18.8 +/- 17.1 A

-19.0 +/- 37.6 1561 +/- 459 1829 +/- 643 89.8 +/- 50.7 579 +/- 104 709 +/- 133 I

I I

I I A=<MDC I

I I

I 42 I

7 I Surry Nuclear Power Station Surry County, Virginia Annual Radiological Environmental Operating Report 2021 I TABLE 3-12 FISH GAMMA EMITTER CONCENTRATIONS I SAMPLING COLLECTION (pCi/kg (wet) +/- 2 Sigma)

NUCLIDE LOCATION DATE FISH TYPE I SD 4/6/2021 Catfish Mn-54 13.4 +/- 40.6 Co-58 21.1 +/- 37.1 Fe-59 44.2 +/- 72.2 Co-60

-11.9 +/- 35.1 4/6/2021 Game Fish -5.09 +/- 35.0 -23.3 +/- 35.5 -34.4 +/- 71.5 28.6 +/- 42.4 I 10/7/2021 10/7/2021 Catfish Game Fish 36.7 +/- 48.3 0.20 +/- 47.6

-63.5 +/- 44.3

-21.7 +/- 43.5

-11.1 +/- 82.1 19.8 +/- 104

-2.19 +/- 44.0

-7.61 +/- 50.5 Zn-65 Cs-134 Cs-137 K-40 I 4/6/2021 4/6/2021 10/7/2021 Catfish Game Fish Catfish

-36.7 +/- 72.3 21.9 +/- 87.5

-102 +/- 103

-15.5 +/- 40.0

-2.28 +/- 36.3

-12.6 +/- 59.4 4.42 +/- 42.4

-2.40 +/- 31.7

-33.9 +/- 55.3 1336 +/- 852 1999 +/- 897 3077 +/- 1154 10/7/2021 Game Fish -69.9 +/- 103 -2.62 +/- 49.7 -2.96 +/- 47.2 1494 +/- 757 I

I I

A= <MDC I

43 I

I Surry Nuclear Power Station Surry County, Virginia Annual Radiological Environmental Operating Report 2021 I TABLE 3-13 OYSTERS GAMMA EMITTER CONCENTRATIONS I SAMPLING COLLECTION (pCi/kg (wet) +/- 2 Sigma)

NUCLIDE LOCATIONS DATE I POS 4/5/2021 Mn-54 20.5 +/- 39.3 Co-58

-13.7 +/- 39.9 Fe-59 106 +/- 82.6 A Co-60 15.4 +/- 39.9 9/30/2021 -12.5 +/- 42.8 -19.3 +/- 43.7 6.46 +/- 79.0 4.70 +/- 45.7 I 4/5/2021 Zn-65

-33.5 +/- 80.0 Cs-134 5.86 +/- 44.6 Cs-137 6".47 +/- 48.6 9/30/2021 -51.5 +/- 84.5 24.1 +/- 39.6 -14.1 +/- 44.4 I Mn-54 Co-58 Fe-59 Co-60 MP 4/5/2021 -10.4 +/- 32.5 16.4 +/- 25.9 -19.4 +/- 70.6 -40.4 +/- 30.3 I 9/30/2021 -4.76 +/- 38.2 Zn-65

-22.0 +/- 50.9 Cs-134

-54.5 +/- 92.4 Cs-137

-17.6 +/- 55.5 4/5/2021 -34.4 +/- 70.3 12.2 +/- 33.5 -5.28 +/- 23.1 I 9/30/2021 -104 +/- 91.4 -39.2 +/- 43.7 26.8 +/- 31.9 I SHI 4/5/2021 9/30/2021 Mn-54

-6.62 +/- 42.5

-4.20 +/- 34.0 Co-58

-10.5 +/- 39.1

-26.5 +/- 29.3 Fe-59 35.5 +/- 97.0 12.4 +/- 74.2 Co-60

-10.2 +/- 44.9

-2.57 +/- 40.2 I 4/5/2021 9/30/2021 Zn-65

-70.6 +/- 72.0

-82.9 +/- 89.2 Cs-134 18.1 +/- 46.1 4.16 +/- 35.4 Cs-137

-1.75 +/- 41.5 29.1 +/- 41.4 I

I I

A= <MDC I

44 I

I Surry Nuclear Power Station Surry County, Virginia Annual Radiological Environmental Operating Report 2021 I TABLE 3-14 CLAMS GAMMA EMITTER CONCENTRATIONS I SAMPLING COLLECTION (pCi/kg (wet) +/- 2 Sigma)

NUCLIDE LOCATIONS DATE I JI 3/25/2021 Mn-54

-23.5 +/- 26.1 Co-58 3.47 +/- 35.0 Fe-59

-41.9 +/- 77.7 Co-60

-9.30 +/- 38.1 9/14/2021 -4.42 +/- 22.4 37.5 +/- 32.3 A -16.8 +/- 69.0 -3.65 +/- 21.3 I 3/25/2021 Zn-65 4.04 +/- 65.6 Cs-134 21.0 +/- 32.5 Cs-137 4.49 +/- 32.5 9/14/2021 46.6 +/- 57.8 -11.2 +/- 24.3 5.28 +/- 27.2 I Mn-54 Co-58 Fe-59 Co-60 SD 3/25/2021 6.42 +/- 31.4 -3.23 +/- 33.9 -12.9 +/- 68.8 0.36 +/- 28.9 I 9/15/2021 12.3 +/- 45.4 Zn-65

-36.6 +/- 58.1 Cs-134 24.8 +/- 113 Cs-137

-6.18 +/- 43.5 3/25/2021 -57.6 +/- 84.9 -37.1 +/- 39.8 -9.35 +/- 31.5 I 9/15/2021 -0.30 +/- 113 -16.4 +/- 43.9 -16.2 +/- 42.9 Mn-54 Co-58 Fe-59 Co-60 I CHIC-C 3/17/2021 9/14/2021 5.20 +/- 40.6

-32.3 +/- 36.9

-38.2 +/- 46.7 14.6 +/- 37.3 0.14 +/- 113 52.1 +/- 83.2

-14.9 +/- 38.8

-4.44 +/- 40.5 I 3/17/2021 9/14/2021 Zn-65

-0.81 +/- 87.2 15.2 +/- 65.2 Cs-134 4.70 +/- 45.5

-20.9 +/- 44.3 Cs-137

-22.2 +/- 40.6

-10.0 +/- 37.7 I

I I

A=<MDC I

45 I

I Surry Nuclear Power Station Surry County, Virginia Annual Radiological Environmental Operating Report 2021 I TABLE 3-15 CRABS GAMMA EMITTER CONCENTRATIONS I SAMPLING COLLECTION (pCi/kg (wet) +/- 2 Sigma)

NUCLIDE LOCATIONS DATE I SD 7/16/2021 Mn-54

-43.5 +/- 40.2 Co-58

-7.50 +/- 41.6 Fe-59

-29.8 +/- 84.1 Co-60 1.77 +/- 31.5 I 7/16/2021 Zn-65 15.2 +/- 78.3 Cs-134

-0.60 +/- 42.2 Cs-137 11.2 +/- 42.8 K-40 1569 +/- 815 I

I I

46 I

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4. DISCUSSION OF RESULTS I Data from the radiological analyses of environmental media collected during 2021 and tabulated in Section 3, are discussed below. The procedures and specifications followed in I the laboratory for these analyses are as required in the Teledyne Brown Engineering quality assurance manuals and laboratory procedures. In addition to internal quality control I measures performed by the laboratories, they also participate in an lnterlaboratory Comparison Program. Participation in this program ensures that independent checks on the precision and accuracy of the measurements of radioactive material in environmental I samples are performed. The results of the lnterlaboratory Comparison Program are provided in Appendix 8.

I The predominant radioactivity detected throughout 2021 was from external sources, such as fallout from nuclear weapons tests (cesium-137) and naturally occurring radionuclides.

I Naturally occurring nuclides, such as beryllium-?, radium-226, actinium-228, thorium-228, thorium-232 and potassium-40, were detected in numerous samples.

I The following is a discussion and summary of the results of the environmental measurements taken during the 2021 reporting period.

I I

I I 49 I

I I

4.1 Gamma Exposure Rate I A thermoluminescent dosimeter (TLD) is an inorganic crystal used to detect ambient radiation. These TLDs are made of CaF and LiF compounds and are specifically designed I for environmental monitoring. Three TLDs are deployed at each sampling location. TLDs are placed in two concentric rings around the station. The inner ring is in the vicinity of the site I boundary, and the outer ring is located at approximately five miles from the station. TLDs are also placed in special interest areas, such as population centers and nearby residences.

Additional TLDs serve as controls. Ambient radiation comes from naturally occurring I radioisotopes in the air and soil, radiation from cosmic origin, fallout from nuclear weapons testing, station effluents and direct radiation from the station.

I The results of the TLD analyses are presented in Table 3-2. There was no detectable external dose to members of the public from Surry Power Station in 2021. The results of the I TLD analyses shown in Table 3-2 comply with Section 7 of ANSI/HPS N13.37-2014 to ensure accurate environmental results. The long-term integrity of each field monitoring location is accomplished by a thorough, documented evaluation of the location for changes that could I impact data quality in accordance with Section 7.1 of the ANSI Standard. Since off-site processing of TLDs is used, extraneous dose received prior to and after removal from the field is quantified in compliance with Section 7.2 of the ANSI Standard. Data analysis for I Table 3-2 was performed in accordance with Section 7.3 of the ANSI Standard. This includes normalizing results to a standard 91-day quarterly monitoring period, determination of the I baseline background dose for each monitoring location and determination of the smallest facility-related dose that can be detected above the baseline background.

I 4.2 Airborne Gross Beta I Air is continuously sampled by passing through glass fiber particulate filters. The filters collect airborne particulate radionuclides. Once a week the samples are collected and analyzed for gross beta activity. Results of the weekly gross beta analyses are presented in I Table 3-3. A review of the results from control and indicator locations continues to show no significant variation in measured activities. Refer to Figures 4.1 and 4.2 for details. Data presented in these figures indicate that any contribution from station related activities is not I measurable.

I Gross beta activity found during the pre-operational and early operating period of Surry Power Station was higher because of nuclear weapons testing. During that time, nearly 740 nuclear weapons were tested worldwide. In 1985 weapons testing ceased, and except for I the Chernobyl accident in 1986, airborne gross beta results have remained steady.

I 50 I

I Figure 4-1:

2021 GROSS BETA IN AIR PARTICULATES I 0.045 0.040 0.035 I ..e 0.030 0.Q25 0a. 0.020 0.Ql5 I 0.010 0.005 I

I -+- Avg Indicator __..,__ Ave Control I I

Figure 4-2 :

I GROSS BETA IN AIR PARTICULATES 10 YEAR HISTORICAL TREND I

I l.OE-01 I l.0E-02 I

\0 r--

00 0 I 0 N

0 N

0 M

0 N

s M

I I 51 I

I I

I 4.3 Airborne Radioiodine I Air is also continuously sampled for radioiodine by passing air through charcoal cartridges.

Once a week, the charcoal cartridge samples are collected and analyzed. The results of the I analyses are presented in Table 3-4. All results are below the lower limit of detection. No

positive iodine-131 was detected in air samples in 2021.

I 4.4 Air Particulate Gamma I The air particulate filters from the weekly gross beta analyses are composited by location and analyzed quarterly by gamma spectroscopy. The results are listed in Table 3-5. The I results indicate the presence of naturally occurring beryllium-?, which is produced by cosmic processes. No man-made radionuclides were identified. These analyses confirm there are no effects from station effluents.

I 4.5 Animal Milk I Analysis of milk samples is generally the most sensitive indicator of fission product existence in the terrestrial environment. This, in combination with the significant human consumption I of milk, results in this pathway often being the most critical as it relates to station radiological effluents. This pathway also shows measurable amounts of nuclear weapons testing fallout.

Therefore, this media needs to be carefully evaluated when determining the effects from I station effluents.

Results of gamma spectroscopy indicate no detectable station related radioactivity was I identified in milk samples in 2021. Only naturally occurring potassium-40 was detected. The results of the analyses are presented in Table 3-6.

I At the request of the Commonwealth of Virginia, a quarterly composite sample is prepared from the monthly milk samples from the Colonial Parkway collection station. The composite I samples are analyzed for strontium-89 and strontium-90. No strontium-89 was detected in the four composites analyzed. Strontium-90 was detected in all four composite samples, with an average concentration of 1. 76 pCi/L. Strontium-90 is not a component of station I radiological effluents and is a product of nuclear weapons testing fallout.

I I 52 I

I I

4. 6 *Food Products I Three food product samples (corn, peanuts, and soybeans) were collected and analyzed by gamma spectroscopy. The results of the analyses are presented in Table 3-7. Only naturally I occurring potassium-40 was detected in all samples. No station related radioactivity was detected in this pathway.

I 4. 7 Well Water I Well water is not considered to be affected by station operations because there are no discharges made to this pathway. However, Surry Power Station monitors well water quarterly at three indicator locations. Well water samples are analyzed for gamma radiation I and tritium. The results are presented in Table 3-8. No positive tritium or station related radioactivity was detected in 2021. Historically, during the pre-operational period, no I gamma emitting isotopes were detected.

4.8 River Water I Samples of the James River water are collected monthly and the results are presented in I Table 3-9. All samples are analyzed by gamma spectroscopy. The monthly samples are also composited and analyzed for tritium on a quarterly basis. No positive tritium or station related radioactivity was detected in this pathway in 2021. Only naturally I occurring potassium-40 and thorium-228 were detected. No station related radioactivity was detected.

I I

I 53 I

I I

4.9 Silt I Silt is sampled to evaluate any buildup of radionuclides in the environment due to the operation of the station. Sampling of this pathway provides a good indication of the I dispersion effects of effluents to the river. Buildup of radionuclides in silt could indirectly lead to increasing radioactivity levels in clams, oysters, crabs, and fish.

I Samples of silt are collected from three locations: one upstream, one downstream of the station and one in the dredge area of the station intake. The station intake silt sample was I added in 2017 to provide data for future station intake dredging operations. The results of the gamma spectroscopy analyses are presented in Table 3-10. Naturally occurring beryllium-?, potassium-40, radium-226, actinium-228, thorium-228, and I thorium-232 were detected. Historically, cobalt-60 has been detected in samples obtained from the station discharge indicator location. Cobalt-60 has not been detected since 2003. A I trend of cesium-137 and cobalt-60 concentrations is graphed and presented in Figures 4-4 and 4-5. For three decades, the general concentration for cesium-137 has continued to decrease. This trend is the calculated average of the semi-annual analysis results.

I The presence of cesium-137 in indicator location, Station Intake, and control location, Chick is indicative of the accumulation, through runoff, of cesium-137 into the James River from I residual weapons testing fallout. Samples collected from the James River, during the pre-operational period, indicated the presence of cesium-137. The pre-operational average I cesium-137 concentration is indicated in Figure 4-5.

The Station Intake indicator sample was added to the REMP in 2017. The additional sample I is collected in the dredge channel area at the station intake. The dredge channel is approximately 150' wide and 1750' in length. This location was added to support future station intake channel dredging operations. The trend of cesium-137 concentration in silt in I the station intake dredge channel is procedurally monitored and evaluated.

I The highest silt indicator location in 2021 is the Station Intake with a cesium-137 concentration of 220 pCi/kg. This concentration remains consistent with aquatic sediment samples collected in control locations of the James River.

I I 54 I

I Figure4-3:

COBALT-60 IN SILT 1.0E+o4 .,.-- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ,

I ~

g

'C t----t------ --------....::IE:=-..-...~---- - ---.---:.----...-:-.,-.,;;;..a_.. ,. '\...di~r6illc:-:!.!~ ~

I C.

1.0E+-02 Note: Station Intake added to REMP, 3n1 Qtr. 20 I 7 I l.OE+-00 N

r-r-

~

r-00 r-0 00 N

00

~

!; 00 0000

°' :!:: °' :!:: :!:: °' °'

0 N

!:: °'

~

""" °'

00

!:: °'

0 0

0 N

N 0

0 N

c!;

0 N

~

0 0

N N 00 0

0 0

0 N

N 0

N

~

0 N

00 0

N 0

N I -+- Control

Chickahominy _.,_ Station Discharge - Station Intake Chickahominy had detectable activity in 1982 and 1984 through 1994. Other years were <MDC, Minimum I Detectable Concentration. Station Discharge was <MDC activity 1996 through 1998 and 2004 through 2021 .

Flgure4-4:

CESIUM-137 IN SILT I LOE+~ ~ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ~

I Note: Station Intake added to REMP, 3rd Qtr.2017

~

'C l l.OE+-03 f+-H'-r---.------jf-~;al-+,.__---------------------------l I uC.

I I

I 55

I I

I 4.10 Shoreline Sediment Shoreline sediment, unlike river silt, may provide a direct dose to humans. A buildup I of radionuclides along the shoreline may provide a source of direct exposure for those utilizing the area for commercial and recreational uses. The analysis results are presented in Table 3-11.

I The naturally occurring radionuclides potassium-40, thorium-228, and thorium-232 were I detected at concentrations equivalent to normal background activities. There were no radionuclides attributable to the operation of the station detected in any of the shoreline sediment samples.

I 4.11 Fish I The radioactivity measured in fish sampled from the Station Discharge Canal and analyzed by gamma spectroscopy is presented in Table 3-12. The 2021 results are similar to those seen over the last decade. Only naturally occurring potassium-40 was detected. No station I related radioactivity was detected in this media.

I 4.12 Oysters Oysters were collected from three different locations. The results of the oyster analyses are I presented in Table 3-13. No gamma emitting radionuclides were detected in oysters sampled in 2021. No station related radioactivity has been detected in this media since 1991.

I 4.13 Clams Clams are analyzed from three different locations. The results of the gamma spectroscopy I analyses are presented in Table 3-14. No gamma emitting radionuclides related to station effluents were detected in clams sampled in 2021.

I 4.14 Crabs I The annual crab sample was collected from the Station Discharge and analyzed by gamma spectroscopy. The results of the analysis are presented in Table 3-15. Other than naturally occurring potassium-40, no other gamma emitting radionuclides related to station I effluents were detected in this media. This is consistent with pre-operational data and data collected over the past decade.

I I 56 I

I I

5. PROGRAM EXCEPTIONS I There were two exceptions to the REMP sampling schedule in 2021.

The two exceptions are detailed below:

I 1. The Colonial Parkway (CP) milk sample from August 2021 was not found at the vendor lab when creating the 3rd quarter Sr-89/90 composite. The quarterly I composite is composed of July and September samples only.

I 2. One of three TLDs from locations: (06) NNE, (22) ALL, (28) 617/618, and (39) JRB was discovered missing at the vendor lab for the fourth quarter. Standard quarter dose was calculated from these locations using two TLDs.

I I

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I I

6. CONCLUSIONS I The results of the 2021 Radiological Environmental Monitoring Program for Surry Power Station are recorded and discussed previously in this document. This section provides a I conclusion of each listed pathway.

I Direct Radiation Exposure Pathway - There was no detectable external dose to members of the public from Surry Power Station in 2021.

Note: The units for the Direct Radiation Exposure Pathway as presented in Table 3-1 I are now recorded in units of mRem/Standard Quarter to match units in the Gamma Exposure Rate recorded in Table 3-2.

I Airborne Exposure Pathway - Radioiodine analyses of charcoal cartridge samples indicated that no positive activity was detected. Quarterly gamma isotopic analyses I of the composite particulate samples identified only naturally occurring beryllium-?.

All indicator locations for air particulate gross beta concentrations trend well with the control locations. The effluent data was reviewed for the period of interest and I concluded the station contribution is not measurable.

Milk - Milk samples are an important indicator measuring the effect of radioactive I iodine and radionuclides in airborne releases. No positive cesium-137 or iodine-131 activity was detected in any of the thirty-six samples. Naturally occurring I potassium-40 was detected in this pathway at levels are similar to historical values.

I Strontium-90 was detected in each of the quarterly composite samples with an average concentration of 1. 76 pCi/L. Strontium-90 is not a component of station effluents, but rather, a product of nuclear weapons testing fallout.

I Food Products - Only naturally occurring potassium-40 was detected in all three I food product samples. Historically, cesium-137 had occasionally been detected in these samples and is attributable to global fallout from past nuclear weapons testing.

No positive cesium-137 activity was detected in food product samples in 2021 I Well Water - Well water samples were analyzed for gamma emitting radionuclides and tritium. Well water sample analyses indicate no radioactivity was attributable to I the operation of the station.

I River Water - River water samples were analyzed for gamma emitting radionuclides and tritium. Only naturally occurring potassium-40 and thorium-228 were detected.

No positive tritium activity was detected.

I 58 I

I I Silt - No radioactivity attributable to the operation of the station was detected in the I control location. Only naturally occurring potassium-40, radium-226, thouium-228, and thorium-232 were detected.

I The indicator sample with the highest concentration of cesium-137 during 2021 is the station intake sample, with a concentration of 220 pCi/kg. This concentration is I consistent with aquatic sediment samples collected in control locations of the James River. Naturally occurring beryllium-?, potassium-40, radium-226, thouium-228, I thorium-232, and actinium-228 were also detected.

Shoreline Sediment - There were no radionuclides attributable to the operation of I Surry Power Station identified in any sample. Naturally occurring potassium-40, thorium-228, and thorium-232 were detected at concentrations equivalent to normal I background activities.

Aquatic Biota I

Fish - Only naturally occurring potassium-40 was detected. There were no other I positive gamma emitting radionuclides detected in any of the fish samples.

Oysters - No positive gamma emitting radionuclides were detected in any of the I oyster samples.

I Clams - No positive gamma emitting radionuclides were detected in any of the clam samples.

I Crabs - Other than naturally occurring potassium-40, there were no other positive gamma emitting radionuclides detected in any of the clam samples.

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I I

I I REFERENCES I

I

I I

References I 1. NUREG-0472, "Radiological Effluent Technical Specifications for PWRs", Draft Rev. 3, March 1982.

I 2. United States Nuclear Regulatory Commission, Regulatory Guide 1.109, Rev. 1, I "Calculation of Annual Doses to Man from Routine Releases of Reactor Effluents for the Purpose of Evaluating Compliance with 10CFR50, Appendix I", October 1977.

I 3. United States Nuclear Regulatory Commission, Regulatory Guide 4.8, "Environmental Technical Specifications for Nuclear Power Plants", December I 1975.

I 4. United States Nuclear Regulatory Commission Branch Technical Position, "Acceptable Radiological Environmental Monitoring Program", Rev. 1, November 1979.

I 5. Dominion, Station Administrative Procedure, VPAP-2103S, "Offsite Dose Calculation Manual (Surry)".

I 6. Virginia Electric and Power Company, Surry Power Station Technical I Specifications, Units 1 and 2.

7. HASL-300, Environmental Measurements Laboratory, "EML Procedures Manual,"

I 27 th Edition, Volume 1, February 1992.

8. NUREG/CR-4007, "Lower Limit of Detection: Definition and Elaboration of a I Proposed Position for Radiological Effluent and Environmental Measurements,"

September 1984.

I 9. NCRP Report No. 160, "Ionizing Radiation Exposure of the Population of the United States," March 2009.

I 10. Position paper on "Implementation of ANSI/HPS N13.37-2014 Environmental Dosimetry Criteria at Surry Power Station", November 2016 by John M. Sukosky, I CHP.

I I 61 I

I I

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I I

I APPENDICES I

I I

I I 62 I

I I

I APPENDIX A: LAND USE CENSUS I

Year 2021 I

I I

I I 63 I

I I

LAND USE CENSUS*

I Surry Power Station, Surry County, Virginia January 1 - December 31, 2021 Page 1 of 1 Nearest Nearest I Sector Direction Resident Garden** Nearest Cow Nearest Goat A N 4.1@ 10° (a) (a) (a)

I B NNE 1.9@ 32° (a) (a) (a)

C NE 4.7@35° (a) (a) (a)

I D E

ENE E

(a)

I G F ESE SE (a) 2.8@ 142° (a)

(a)

H SSE 2.7@ 158° 2.7@ 158° (a) (a)

I J s l.7@181° 2.0@ 183° (a) (a)

K SSW 1.9@ 192° 1.9@ 192° 4.8@200° (a)

I L SW 1.2@ 216° 4.7@228° (a) (a)

M WSW 0.4@244° 3.6@245° (a) (a)

I N p

w WNW 3.1 @260° 4.9@283° 3.4@260° (a)

(a)

I Q R

NW NNW 4.6@321° 3.8@338° (a) 4.4@ 334° (a) 3.7@336° (a)

(a)

I I

Locations are listed by miles and degrees heading relative to true north from center of Unit 1 Containment.

- Area greater than 50 m 2 and contains broadleafvegetation.

(a) None I 64 I

I I

I I APPENDIX B:

SUMMARY

OF INTERLABORATORY COMPARISONS I

I Year 2021 I

I I

I 65 I

I I Summary of Results - Inter-laboratory Comparison Program (ICP)

I The TBE Laboratory analyzed Performance Evaluation (PE) samples of air particulate (AP), 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)

I Mixed Analyte Performance Evaluation Program (MAPEP), were evaluated against the following pre-set acceptance criteria:

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

B. ERA Evaluation Criteria I ERA's evaluation report provides an acceptance range for control and warning limits with associated flag values. ERA's acceptance limits are established per the US EPA, National Environmental Laboratory Accreditation Conference (NELAC), state-specific Performance I Testing (PT) program requirements or ERA's 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 I regulatory document.

C. DOE Evaluation Criteria I MAPEP's 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 I

Acceptable with Warning (flag = "W") - result falls in the +/- 20% to +/- 30% of the reference value I

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)

I samples are created to mimic conditions found at DOE sites which do not resemble typical environmental samples obtained at commercial nuclear power facilities.

For the TBE laboratory, 146 out of 154 analyses performed met the specified acceptance I criteria. Seven analyses did not meet the specified acceptance criteria and were addressed through the TBE Corrective Action Program. NOTE: One analysis (soil for Tc-99) that did not meet acceptance criteria was performed for TBE information and is not on the list of required I /GP analyses. A summary is found below:

1. The ERA MRAD March 2021 Water Fe-55 result was evaluated as Not Acceptable. The I reported value for Fe-55 was 579 pCi/L and the known result was 275 pCi/L (acceptance range 162 - 400). When reviewing the original sample data, it was found that the carrier yield was 52.6% (lower than typical water samples). Looking at the etched plate that was counted, it appeared that some loss of sample could have occurred. The sample was I logged for reanalysis and used as the workgroup duplicate. The results were acceptable at 197 and 221 respectively. Yields were 97.4% and 105.7% and the plated samples were centered with no apparent loss of sample. The loss of sample during plating resulted in a I low yield which produced an artificially high sample result. (NCR 21-01) 66 I

I I 2. The MAPEP February 2021 AP Gross Alpha result was evaluated as Not Acceptable. The reported value was 0.371 Sq/sample and the known result was 1. 77 Sq/sample I (acceptance range 0.53 - 3.01 ). A similar failure had occurred several years prior due to the filter being placed with the wrong side up on the detector. At that time, a small dot was placed on the top of the filter prior to removal from the package to indicate the correct side I for counting. The current sample was still in the detector when the result was received (dot side facing the detector). The sample was recounted with a similar result and was flipped and recounted. The flipped result was 0.661 Sq/sample, within the acceptable I range. Because TBE cannot rely on receiving correct packaging from the provider, MAPEP AP cross-checks will be counted on both sides going forward. NOTE: The August sample had the same packaging issue (upside down). (NCR 21-02)

I 3. The MAPEP February 2021 soil Ni-63 was evaluated as Not Acceptable. The reported value was 310 Bq/kg and the known result was 689 (acceptance range 482 - 896). All workgroup QC was reviewed with no anomalies. The analytical procedure had been I revised prior to this analysis to eliminate added interferences. The sample yield was

>100%, indicative of incomplete separation from interferences, leading to a lower result.

The procedure was again revised after acceptable results were obtained. (NCR 21-03)

I 4. The ERA October 2021 water Gross Beta result was evaluated as Not Acceptable. The reported value was 63.0 pCi/L and the known was 55.7 (acceptance range 38.1 - 62.6) or 113% of the known. The 2-sigma error was 6.8, placing the reported result well within the I acceptable range. All QA was reviewed with no anomalies. A follow-up Quick Response cross-check was analyzed with a 120% ratio (see item 7). (NCR 21-10)

I 5. The ERA October 2021 water Tritium result was evaluated as Not Acceptable. The reported value was 13,800 pCi/L and the known was 17,200 (acceptance range 15,000 -

18,900). The 2-sigma error was 1,430, placing the result within the acceptable range.

I TBE's internal QC acceptance is 70% - 130%, while ERA's for this sample was 87% -

110%. All QA was reviewed with no anomalies. A Quick Response follow-up cross-check was analyzed with a result of 17,500 pCi/L (known 17,800 pCi/L). (NCR 21-11)

I 6. The MAPEP August 2021 soil Ni-63 result was evaluated as Not Acceptable. The reported value was 546 Bq/kg and the known result was 1,280 Bq/kg (acceptance range 896 - 1,664). All QC was reviewed and no anomalies found. The procedure revision to I remove added MAPAP interferences was ineffective for this sample. No client soil matrix samples were analyzed for Ni-63 in 2020 or 2021. The root cause investigation is still ongoing at this time. (NCR 21-13)

I 7. The ERA December 2021 Quick Response water Gross Beta result was evaluated as Not Acceptable. The reported value was 47.6 pCi/L and the known was 39.8 pCi/L or 120% of I the known (acceptance range of 26.4 - 47.3). The 2-sigma error was 6.1, placing the reported result well within the acceptable range. All QA was reviewed with no anomalies.

The original sample was recounted on a different detector with a result of 40.3 +/- 6.27 I pCi/L. The "failure" of this sample and the RAD-127 was due to the narrow upper acceptance ranges assigned (119% and 112%) (NCR 21-14)

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

I 67 I

I I A.1 Analytics Environmental Radioactivity Cross Check Program Teled:£ne Brown Engineering Environmental Services TSE I Month/Year Identification Number Matrix Nuclide Units Reported Value Known Value (a)

Ratio of TBE to Analytics Result Evaluation (bl March 2021 E13466 Milk Sr-89 pCi/L 84.6 87.1 0.97 A I Sr-90 pCi/L 11.5 12.6 0.91 A E13467 Milk Ce-141 pCi/L 111 125 0.89 A I Co-58 Co-60 pCi/L pCi/L 123 140 128 154 0.96 0.91 A

A Cr-51 pCi/L 252 242 1.04 A I Cs-134 Cs-137 pCi/L pCi/L 130 110 151 110 0.86 1.00 A

A Fe-59 pCi/L 105 109 0.96 A I 1-131 Mn-54 pCi/L pCi/L 77.6 111 86.9 112 0.89 0.99 A

A Zn-65 pCi/L 200 211 0.95 A I E13468 Charcoal 1-131 pCi 83.5 88.5 0.94 A E13469 AP Ce-141 pCi 103.0 103 1.00 A I Co-58 Co-60 pCi pCi 93.3 136 105 126 0.89 1.08 A

A Cr-51 pCi 213 198 1.07 A I Cs-134 Cs-137 pCi pCi 123.0 86.3 124 90.1 0.99 0.96 A

A Fe-59 pCi 81.3 89.6 0.91 A I Mn-54 Zn-65 pCi pCi 93.5 166 92.0 173 1.02 0.96 A

A I

E13470 Soil Ce-141 pCi/g 0.232 0.262 0.89 A Co-58 pCi/g 0.251 0.268 0.94 A Co-60 pCi/g 0.306 0.322 0.95 A Cr-51 pCi/g 0.517 0.506 1.02 A I Cs-134 Cs-137 pCi/g pCi/g 0.263 0.278 0.317 0.301 0.83 0.92 A

A Fe-59 pCi/g 0.228 0.229 1.00 A I Mn-54 Zn-65 pCi/g pCi/g 0.221 0.448 0.235 0.441 0.94 1.02 A

A I E13471 AP Sr-89 Sr-90 pCi pCi 92.2 11.7 95.5 13.9 0.97 0.84 A

A I (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:

I 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 I (Page 1 of 4) 68 I

I I A.1 Analytics Environmental Radioactivity Cross Check Program Teledxne Brown En1;1ineerin1;1 Environmental Services TBE I MonthNear Identification Number Matrix Nuclide Units Reported Value Known Value (a)

Ratio of TBE to Analytics Result Evaluation (b) w I

September 2021 E13472 Milk Sr-89 pCi/L 66.4 85.4 0.78 Sr-90 pCi/L 11.9 14.0 0.85 A E13473 Milk Ce-141 pCi/L 118 114 1.03 A I Co-58 Co-60 pCi/L pCi/L 116 142 118 145 0.98 0.98 A

A Cr-51 pCi/L 244 236 1.03 A-I Cs-134 Cs-137 pCi/L pCi/L 81 105 93.1 112 0.87 0.94 A

A Fe-59 pCi/L 105 102 1.03 A I 1-131 Mn-54 pCi/L pCi/L 65.1 128 85.6 128 0.76 1.00 w

A Zn-65 pCi/L 158 153 1.03 A I E13474 Charcoal 1-131 pCi 85.2 90.9 0.94 A E13475 AP Ce-141 pCi 126 135 0.94 A I Co-58 Co-60 pCi pCi 148 183 139 171 1.07 1.07 A

A Cr-51 pCi 322 278 1.16 A I Cs-134 Cs-137 pCi pCi 118 147 110 132 1.08 1.12 A

A Fe-59 pCi 131 120 1.09 A I Mn-54 Zn-65 pCi pCi 161 202 151 180 1.06 1.12 A

A I E13476 Soil Ce-141 Co-58 Co-60 pCi/g pCi/g pCi/g 0.215 0.208 0.277 0.219 0.226 0.277 0.98 0.92 1.00 A

A A

I Cr-51 Cs-134 Cs-137 pCi/g pCi/g pCi/g 0.388 0.157 0.270 0.452 0.178 0.284 0.86 0.88 0.95 A

A A

Fe-59 I

pCi/g 0.218 0.195 1.12 A Mn-54 pCi/g 0.239 0.246 0.97 A Zn-65 pCi/g 0.312 0.293 1.06 A I E13477 AP Sr-89 Sr-90 pCi pCi 85.6 12.6 68.3 11.2 1.25 1.13 w

A I (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:

I =

=

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 I (Page 2 of 4) 69 I

I A.2 DOE's Mixed Analyte Performance Evaluation Program (MAPEP)

I Month/Year Identification Teled3!ne Brown Engineering Environmental Services Matrix Nuclide Units TBE Reported Known Acceptance Evaluation (b)

Number Value (a) Range I

Value February 2021 21-GrF44 AP Gross Alpha Sq/sample 0.371 1.77 0.53 - 3.01 N(3)

Gross Beta Sq/sample 0.731 0.65 0.325 - 0.974 A N1qi I

21-MaS44 Soil Ni-63 Bq/kg 310 689.0 482 - 896 Tc-99 Bq/kg 457 638 447 - 829 w 21-MaSU44 Urine Cs-134 Bq/L 2.34 2.73 1.91 - 3.55 A Cs-137 Bq/L 2.54 2.71 1.90 - 3.52 A I Co-57 Co-60 Mn-54 Bq/L Bq/L Bq/L 0.4100 2.24 2.03 2.44 2.03 (1) 1.71 - 3.17 1.42 - 2.64 A

A A

I K-40 Bq/L 52.8 54.0 38 - 70 A U-234 Bq/L 0.108 0.0877 0.0614 - 0.114 w U-238 Bq/L 0.101 0.091 0.064 - 0.118 A Zn-65 Bq/L 1.06 1.34 (2) A I 21-MaW44 Water Ni-63 Tc-99 Bq/L Bq/L 6.7 3.850 8.2 4.01 5.7 -10.7 2.81 - 5.21 A

A 21-RdV44 Vegetation Cs-134 Sq/sample 3.13 3.60 2.5 - 4.7 A I Cs-137 Co-57 Co-60 Sq/sample Sq/sample Sq/sample 4.64 5.25 2.86 4.69 5.05 2.99 3.28- 6.10 3.54 - 6.57 2.09 - 3.89 A

A A

Mn-54 Sq/sample 5.02 5.25 3.68 - 6.83 A I Sr-90 Zn-65 Sq/sample Sq/sample 0.631

-0.233 0.673 0.471 - 0.875 (1)

A A

August 2021 21-GrF45 AP Gross Alpha Sq/sample 0.368 0.960 0.288 - 1.632 A I 21-MaS45 Soil Gross Beta Ni-63 Tc-99 Sq/sample Bq/kg Bq/kg 0.595 546 453 0.553 1280 777 0.277 - 0.830 896 - 1664 544-1010 A

N\O}

I 21-MaSU45 Urine Cs-134 Cs-137 Co-57 Bq/L Bq/L Bq/L 3.10 0.083 0.844 3.62 0.87 2.53 - 4.71 (1) 0.606 - 1.125 A

A A

Co-60 Bq/L 0.0535 (1) A I Mn-54 K-40 U-234 Bq/L Bq/L Bq/L 0.459 48.8 0.133 0.417 54.0 0.116 (2) 38- 70 0.081 - 0.151 A

A A

U-238 Bq/L 0.137 0.121 0.085 - 0.157 A I 21-MaW45 Water Zn-65 Ni-63 Bq/L Bq/L 0.339 33.5 0.420 39.5 (2) 27.7 - 51.4 A

A Tc-99 Bq/L 3.5 3.7 2.60 - 4.82 A I 21-RdV45 Vegetation Cs-134 Cs-137 Sq/sample Sq/sample 3.42 2.14 4.34 2.21 3.04 - 5.64 1.55 - 2.87 w

A Co-57 Sq/sample 4.08 4.66 3.26 - 6.06 A I Co-60 Mn-54 Sr-90 Sq/sample Sq/sample Sq/sample 2.81 0.035 1.15 3.51 1.320 2.46 - 4.56 (1) 0.92-1.72 A

A A

Zn-65 Sq/sample 2.05 2.43 1.70-3.16 A I (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) DOEIMAPEP evaluation:

=

I 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 I (3) See NCR 21-02 (4) See NCR 21-03 (5) See NCR 21-13 (6) Tc-99 cross-checks done for TBE information only- not required 70 (Page 3 of 4)

I

I I A.3 ERA Environmental Radioactivity Cross Check Program Teledyne Brown Engineering Environmental Services TBE Identification Known Acceptance Month/Year Matrix Nuclide Units Reported Evaluation I

Cb)

Number Value<a) Limits Value March 2021 MRAD-34 Water Am-241 pCi/L 175 157 108-201 A Fe-55 pCi/L 579 275 162-400 N\lJ I Pu-238 Pu-239 pCi/L pCi/L 181 153 171 142 103-222 87.9 -175 A

A Soil Sr-90 pCi/kg 6570 9190 2860 - 14,300 A I AP Fe-55 U-234 U-238 pCi/filter pCi/filter pCi/filter 107 25.99 24.7 121 25.5 25.3 44.2-193 18.9 - 29.9 19.1 - 30.2 A

A A

I April 2021 RAD-125 Water Ba-133 Cs-134 Cs-137 pCi/L pCi/L pCi/L 92.3 62.9 161 90.5 70.5 168 76.2 - 99.6 57.5 - 77.6 151 -187 A

A A

Co-60 pCi/L 22.5 20.9 17.7 - 25.8 A I Zn-65 GR-A GR-B pCi/L pCi/L pCi/L 183 30.8 60.1 177.0 30.2 67.5 159 - 208 15.4 - 39.4 46.8 - 74.2 A

A A

U-Nat pCi/L 36.45 36.9 30.0-40.8 A I H-3 Sr-89 pCi/L pCi/L 13,400 64.5 14,600 63.5 12,800-16,100 51.4- 71.5 A

A Sr-90 pCi/L 22.8 23.0 16.5- 27.0 A I September 2021 MRAD-35 Water 1-131 Am-241 Fe-55 pCi/L pCi/L pCi/L 28.2 68 179 26.7 63.7 246 22.2 - 31.4 43.7-81.5 145- 358 A

A A

Pu-238 102 114 I

pCi/L 68.5 - 148 A Pu-239 pCi/L 32 34.3 21.2-42.3 A Soil Sr-90 . pCi/kg 6160 6090 1,900 - 9,490 A I AP Fe-55 Pu-238 Pu-239 pCi/filter pCi/filter pCi/filter 493 28 21 548 28.5 21.6 200 - 874 21.5- 35.0 16.1 - 26.1 A

A A

U-234 pCi/filter 7.95 7.76 5.75 - 9.09 A I October 2021 RAD-127 Water U-238 Ba-133 pCi/filter pCi/L 8.0 82.8 7.69 87.5 5.81 - 9.17 73.6 - 96.2 A

A Cs-134 pCi/L 64.0 70.1 57.1-77.1 A I Cs-137 Co-60 Zn-65 pCi/L pCi/L pCi/L 145 83.2 133 156 85.9 145 140 - 174 77.3- 96.8 130 -171 A

A A

GR-A pCi/L 76.0 66.7 35.0- 82.5 A I GR-B U-Nat H-3 pCi/L pCi/L pCi/L 63.0 52.88 13,800 55.7 55.5 17,200 38.1 -62.6 45.3-61.1 15,000 - 18,900 Nl'I A

Nl"I Sr-89 pCi/L 54.9 61.0 49.1 - 68.9 A I Sr-90 1-131 pCi/L pCi/L 24.8 27.4 29.3 26.4 21.3 - 34.0 21.9-31.1 A

A Nl4J December 2021 QR 120121Y Water GR-B pCi/L 47.6 39.8 26.4-47.3 I H-3 pCi/L 17,500 17,800 15,600 - 19,600 (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.

A I (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 21-01 (2) See NCR 21-10 I (3) See NCR 21-11 (4) See NCR 21-14 71 (Page 4 of 4)

I

ML22126A102

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