Text

Independent Spent Fuel Storage Installation - Annual Radiological Environmental Operating Report
	ML19127A293
Person / Time
Site:	Oconee, Surry, 07200055
Issue date:	04/29/2019
From:	Garver R; Virginia Electric & Power Co (VEPCO)
To:	; Document Control Desk, Office of Nuclear Material Safety and Safeguards, Office of Nuclear Reactor Regulation
References
	19-186
	Download: ML19127A293 (78)
	v • d • e

VIRGINIA ELECTRIC AND POWER COMPANY RICHMOND, VIRGINIA 23261 APR 2 ,9 2019 United States Nuclear Regulatory Commission Serial No.19-186 Attention: Document Control Desk S&L/TSC 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 INDEPENDENT SPENT FUEL STORAGE INSTALLATION 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, 2018 through December 31, 2018, which includes environmental monitoring for the Surry ISFSI.

If you have any further questions, please contact Lee Ragland at 757-365-2010.

Sincerely, Robert M. Garver II Director Safety & Licensing Surry Power Station rEZ5 Attachment -----

/VA1 !5 s L- /p Commitments made in this letter: None A)I-/C-A)lvf.5 s

Serial No.19-186 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 NRC Senior Resident Inspector Surry Power Station Director, Virginia Health Department Division of Radiological Health 109 Governor Street, Room 730 Richmond, Virginia 23219

Serial No.19-186 Docket Nos.: 50-280 50-281 72-2 72-55 ATTACHMENT 1 2018 Annual Radiological Environmental Operating Report SURRY POWER STATION UNITS 1 AND 2 VIRGINIA ELECTRIC AND POWER COMPANY

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1 2018 Annual Radiological Environmental Operating Report i

, I Surry Power Station A, Dominion j? Energy

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_, Dominion Energy Surry Power Station Radiological Environmental Monitoring Program January 1, 2018 to December 31, 2018 I i

Annual Radiological Environmental Operating Report Surry Power Station January 1, 2018 to December 31, 2018 i

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Prepared by: ---¥---=~~-~W.c....__p=.*

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if,____,, ,~~tf!~-- ~

J. W. Abbott, Jr.

Health Physicist Reviewed by: ---~t::f._._c[___/._~------ ------

A. E. Hairston Supervisor Radiological Analysis Reviewed by: I I

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Approved by=------~--~= O\M- _ ___,_...,__ _ _ _ _ _ __

' T. *L. Ragland Manager Radiological Protection and Chemistry

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Table of Contents PREFACE .............................................................................................................................................. 4

1. EXECUTIVE

SUMMARY

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

2. PROGRAM DESCRIPTION ............................................................................................................ ?

2.1 Introduction ............................................................................................................................. ?

2.2 Sampling and Analysis Program ............................................................................................. 8

3. ANALYTICAL RESULTS ............................................................................................................ 20 3.1 Summary of Results .............................................................................................................. 20 3 .2 Analytical Results of 2018 REMP Samples ......................................................................... 28

4. DISCUSSION OF RESULTS ...................................................................................................... 49 4.1 Gamma Exposure Rate ......................................................................................................... 49 4.2 Airborne Gross Beta ............................................................................................................. 50 i I 4.3 Airborne Radioiodine ............................................................................................................ 51 I

4.4 Air Particulate Gamma ......................................................................................................... 51 4.5 Animal Milk .......................................................................................................................... 52 4.6 Food Products ....................................................................................................................... 52 4.7 Well Water ............................................................................................................................ 52 4.8 RiverWater ........................................................................................................................... 53 4.9 Silt ......................................................................................................................................... 53 4.10 Shoreline Sediment ............................................................................................................. 55 4.11 Fish ...................................................................................................................................... 55 4.12 Oysters ................................................................................................................................ 56 4.13 Clams .................................................................................................................................. 56 4.14 Crabs ................................................................................................................................... 56

5. PROGRAM EXCEPTIONS ........................................................................................................... 57

6. CONCLUSIONS ............................................................................................................................. 58 REFERENCES .................................................................................................................................... 60 APPENDICES ..................................................................................................................................... 62 APPENDIX A: LAND USE CENSUS ........................................................................................... 63 APPENDIX B:

SUMMARY

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

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PREFACE 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 Installation (ISFSI) Technical Specifications, Appendix C, Item 1.3.1.

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1. EXECUTIVE

SUMMARY

This document is a detailed report of the 2018 Surry Power Station Radiological Environmental Monitoring Program (REMP). Radioactivity levels from January 1 through December 31, 2018, in air, water, silt, shoreline sediment, milk, aquatic

, biota, food products 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 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.

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. A number of sampling locations for each medium are selected using available meteorological, land use, and water use data. Two types of samples are obtained. The first type, control 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 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 station contribution will be at the highest concentration.

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 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 environment.

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

Participation in an Interlaboratory Comparison Program provides an independent check of sample measurement precision and accuracy. Typically, radioactivity L_ 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 1

! this, the United States Nuclear Regulatory Commission (USNRC) requires that equipment used for radiological environmental monitoring must be able to detect specified 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 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 Analytical results are reported for all possible radiation exposure pathways to man. These pathways include airborne, aquatic, terrestrial and direct radiation exposure. The airborne exposure pathway includes radioactive airborne iodine and particulates. The 2018 airborne results were similar to previous years. No station related radioactivity was detected and natural radioactivity levels remained at levels consistent with past years' results. Aquatic exposure pathway samples include well and river water, silt and shoreline sediments, crabs, fish, clams and l i I i oysters. Naturally occurring radionuclides such as beryllium-7, potassium-40, radium-226, thorium-228, thorium-232 and actinium-228 were detected at average environmental levels. No man-made radionuclides were detected in well I

I I water. This trend is consistent throughout the operational environmental monitoring program. No man-made 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 were detected. These background levels are attributable to fallout from historic weapons testing and nuclear accidents such as Chernobyl. Naturally occurring potassium-40, beryllium-7, radium-226 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, actinium-228, radium-226 thorium-228 I

I 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 2018 milk samples and has not been detected in milk prior to or since 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 samples. The direct exposure pathway measures environmental radiation dose using TLDs. TLD results have remained relatively constant over the years.

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During 2018, 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 for a hypothetical individual at the_ station site boundary due to liquid and gaseous effluents -released from the station during 2018 was 0.048 millirem. For reference, this dose may be compared to the 620 millirem I I average annual exposure to every person in the United States 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

, I 0.1 %. These results demonstrate compliance with federal and state regulations and also demonstrate the adequacy of radioactive effluent controls at Surry Power Station.

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2. PROGRAM DESCRIPTION I

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1 ' 2.1 Introduction This report documents the 2018 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 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 is designed with a nominal gross electrical output of 910 megawatts electric (MWe). Unit 1 achieved commercial operation on December 22, 1972, and Unit 2 on May 1, 1973.

The United States Nuclear Regulatory Commission regulations (10CFR50.34a) require that nuclear power plants be designed, constructed and operated to keep levels of radioactive 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.

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Dominion personnel are responsible for collecting the various indicator and control environmental samples. Mirion Technologies is responsible for processing the TLDs. Teledyne Brown Engineering is responsible for sample analyses. The results of the analyses 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 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. 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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Occasionally, samples of environmental media may show the presence of man-made radionuclides. As a method of referencing the measured radionuclide concentrations in the 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) and VPAP-2103S, Offsite Dose Calculation Manual (Surry).

These concentrations are based upon the annual dose commitment recommended I !

by 10CFR50, Appendix I, to meet the criterion of "As Low As (is) Reasonably I Achievable."

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This report documents the results of the REMP for 2018 and satisfies the following*

objectives of the program:

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

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

~ To identify changes in radioactivity in the environment.

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

2.2 Sampling and Analysis Program I

I Table 2-1 summarizes the 2018 sampling program for Surry Power Station. All samples listed 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.

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

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

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Table 2-1 SURRY-2018 RADIOLOGICAL SAMPLING STATIONS DISTANCE AND DIRECTION FROM UNIT NO. 1 P . 1 of3 Distance Collection Sample Media Location Station Miles Direction Degrees Frequency Remarks Onsite (Stored in a lead shield outside the protected Environmental Control (00) Quarterly 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 mile Route 633 (21) 4.9 SW 227° Quarterly Apx. 5 mile Alliance (22) 5.1 WSW 247° Quarterly Apx. 5 mile Surry (23) 7.7 WSW 256° Quarterly Population Center Route 636 and 637 (24) 4.0 w 270° Quarterly Apx. 5 mile Scotland Wharf (25) 5.0 WNW 284° Quarterly Apx. 5 mile Jamestown (26) 6.3 NW 308° Quarterly Apx. 5 mile Colonial Parkway (27) 3.8 NNW 333° Quarterly Apx. 5 mile Route 617 and 618 (28) 4.9 NNW 340° Quarterly Apx. 5 mile Kingsmill (29) 4.6 N 20 Quarterly Apx. 5 mile Williamsburg (30) 7.8 N oo Quarterly Population Center Kingsmill North (31) 5.5 NNE 12° Quarterly Apx. 5 mile Budweiser (32) 5.8 NNE 27° Quarterly Population Center Water Plant (33) 5.0 NE 46° Quarterly Apx. 5 mile 9

Table 2-1 SURRY-2018 RADIOLOGICAL SAMPLING STATIONS DISTANCE AND DIRECTION FROM UNIT NO. 1 Pg. 2 of3 Distance Collection Sam~le Media Location Station Miles Direction Degrees Freguencr Remarks Environmental BASF (34) 5.1 ENE 70° Quarterly Apx. 5 mile TLDs Lee Hall (35) 7.1 ENE 75° Quarterly Population Center Goose Island (36) 5.1 E 90° Quarterly Apx. 5 mile Fort Eustis (37) 4.9 ESE 104° Quarterly Apx. 5 mile 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 mile Route 628 (43) 5.1 s 177° Quarterly Apx. 5 mile 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 870 Quarterly Shoreline Hog Island Reserve (HIR) 0.6 N 70 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

- Table 2-1 SURRY -2018 RADIOLOGICAL SAMPLING STATIONS DISTANCE AND DIRECTION FROM UNIT NO. 1 P . 3 of3 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 Lover Retreat (LRD) 30.6 NNW 50 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 Lawne's Creek (LC) 2.4 SE 131 ° 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 (IT) 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 (Com, Peanuts, Slade's Farm (SLADE) 3.2 s 179° Annually Soybeans) 11

I Table 2-2

' I SURRY -2018 SAMPLE ANALYSIS PROGRAM P . 1 of3 REPORT SAMPLE MEDIA FREQUENCY ANALYSIS LLD* UNITS mR/Std.

Thermoluminescent Quarterly Gamma Dose 2 Month Dosimetry (TLD)

Air Iodine Weekly 1-131 0.07 pCi/m3 I :

Air Particulate Weekly Gross Beta 0.01 pCi/m3 Gamma Quarterly (a) Isotopic pCi/m3 Cs-134 0.05 Cs-137 0.06 River Water Quarterly Tritium (H-3) 2000 pCi/L Composite of monthly sample Monthly 1-131 10 pCi/L Gamma Isotopic pCi/L Mn-54 15 Fe-59 30 Co-58 15 Co-60 15 Zn-65 30 Zr-95 30 Nb-95 15 Cs-134 15 Cs-137 18 Ba-140 60 La-140 15 Well Water Quarterly Tritium (H-3) 2000 pCi/L 1-131 1 Gamma Isotopic pCi/L Mn-54 15 Fe-59 30 Co-58 15 Co-60 15 Zn-65 30 Zr-95 30 Nb-95 15 Cs-134 15 Cs-137 18 Ba-140 60 La-140 15 I '

Footnotes located at end of table.

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Table 2-2 SURRY -2018 I I I SAMPLE ANALYSIS PROGRAM P . 2 of3 SAMPLE MEDIA FREQUENCY ANALYSIS LLD* REPORT UNITS Shoreline Sediment Semi-Annually Gamma Isotopic pCi/kg-dry Cs-134 150 Cs-137 180 Silt Semi-Annually Gamma Isotopic pCi/kg- dry Cs-134 150 Cs-137 180 Milk Monthly 1-131 1 pCi/L I I Gamma Isotopic pCi/L Cs-134 15 Cs-137 18

-- Ba-140 60 La-140 15 Quarterly Sr-89 NA pCi/L Composite of CP Sr-90 NA monthly sample Oysters Semi-Annually Gamma Isotopic pCi/kg-wet Mn-54 130 Fe-59 260 Co-58 130 Co-60 130 I

Zn-65 260 Cs-134 130 Cs-137 150 Clams Semi-Annually Gamma Isotopic pCi/kg-wet Mn-54 130 Fe-59 260 Co-58 130 Co-60 130 Zn-65 260 Cs-134 130 Cs-137 150

-** Crabs Annually Gamma Isotopic pCi/kg-wet Mn-54 130 Fe-59 260 Co-58 130 Co-60 130 Zn-65 260 I '1 Cs-134 130 I

Cs-137 150 Footnotes located at end of table.

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Table 2-2 SURRY - 2018 SAMPLE ANALYSIS PROGRAM P . 3 of3 SAMPLE MEDIA FREQUENCY ANALYSIS LLD* REPORT UNITS Fish Semi-Annually Gamma Isotopic pCi/kg-wet Mn-54 130 Fe-59 260 Co-58 130 Co-60 130 Zn-65 260 Cs-134 130 Cs-137 150 Food Products Annually Gamma Isotopic pCi/kg-wet I-131 60 Cs-134 60 Cs-137 80 Note: This table is not a complete listing ofnuclides that can be detected and reported. Other 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 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.

(a) Quarterly composites of each location's weekly air particulate samples are analyzed for gamma emitters.

NA None assigned i '

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ESE SW Legend

A SQmpling $ 1alicn,:

TI.D Sampliog Sl~IO El!Vltc.tmen1al

Mon klfing Sites SI le 11.D S.l e,:s

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Evrh t""im Are;i An1 11V1:lr!f

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Figure 1. Surry Radiological Monitoring Locations L-~------------------------------------------------------1

Figure 2. Surry Emergency Plan Map e Air Sampling Stations e Nearest Residents e Nearest Milk Animal 0

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Figure 3. Surry Emergency Plan Map Air Sampling Stations TLD Sampling e

e Nearest Residents Nearest Milk Animal

'%t,;.;~,, e Nearest Garden

-.J}i$;._.:'-----------------------....1 Aquatic Samples

-:\~ Orig' O 1991 by ADC ol Alex nd Inc., 6440 General Groon Way,

> Alexand VA 22312. USED WITH PERMISSION. o olh<< reproduction may bo made without tho wrltt n pormlsslon orAOC.

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Figure 4. Surry Emergency Plan Map e Air Sampling Stations e Nearest Residents e TLD Sampling e Nearest Milk Animal e Nearest Garden Crop Samples Original C> 1991 by ADC of Alexandria, Inc., 6440 General Green Way,

Alexandria. VA 22312. USED WITH PERMISSION. No 01her reproducilon

> may be mode wllllOut the wrmen pennission ot ADC.

Figure 5. Surry Emergency Plan Map

Air Sampling Stations

Nearest Residents

TLD Sampling

Nearest Milk Animal

Nearest Garden Aquatic Samples Original o 1991 by ADC o f ~ . Inc., 6440 Gcnoral Groen Way, Aloxandtla, VA 22312. USED WITH PERMISSION. No other 1e91oductlon moy be mndo hout 1ho Ylrillon petmfsslon ol ADC.

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3. ANALYTICAL RESULTS 3.1 Summary of Results 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 Radiological Environmental Monitoring Program", Revision 1, November 1979. A more detailed analysis of the data is given in Section 4.

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TABLE 3-1: RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

Surry Power Station, Surry County, Virginia - 2018 Docket No. 50-280-281 Page 1 of7 Medium or Indicator Control Pathway Analysis Locations Location with Highest Mean Locations Non-Routine Sampled (Units) Tvpe ITotal No. LLD Mean Ranae I Distance Name Direction I Mean Range Mean Range Reported Measurements Direct Gamma 164 2 5.6 (152/152) STA-9 0.3mi 7.7 (4/4) 5.9 (12/12) 0 Radiation (4.0 - 8.3) E (7.3 - 8.3) (4.8 - 7.6)

TLD (mRI Std Month)

Air Gross 424 10 13.5 (370/371) BASF 5.1 mi 14.9 (53/53) 13.3 (53/53) 0 Particulate Beta (3.21 - 28.1) ENE (5.2 - 28.1) (4.7 - 22.2)

(1 E-3 pCilm3) ------------------------------------------------------------------------------------------ -------------------------------------------------------------

Gamma 32 Be-7 32 136 (28/28) HIR 2.0mi 163 (4/4) 139 (4/4) 0 (88.5 - 208) NNE (111 -208) (107 -187)

K-40 32 < LLD N/A < LLD 17.9 (1/28) 0 (17.9 -17.9)

Cs-134 32 50 < LLD N/A < LLD < LLD 0 Cs-137 32 60 < LLD N/A < LLD < LLD 0 Air Iodine 1-131 424 70 < LLD N/A < LLD < LLD 0 (1E-3 pCilm3)

Milk Strontium 4 (pCi/Liter)

Sr-89 4 < LLD N/A < LLD < LLD 0 Sr-90 4 1.36 (2/4) CP 3.7mi 1.36 (2/4) < LLD 0 (1.24 - 1.48) NNW (1.24 - 1.48)

Gamma 36 K-40 36 1270 (22/24) EPPS 4.8mi 1325 (12/12) 1519 (10/12) 0 (1050 - 1500) SSW (1050 - 1500) (1090 -1890)

Th-228 36 < LLD N/A < LLD < LLD 0

I 1-131 36 < LLD N/A < LLD < LLD 0 Cs-134 36 15 < LLD N/A < LLD < LLD 0 Cs-137 36 18 < LLD N/A < LLD < LLD 0 Ba-140 36 60 < LLD N/A < LLD < LLD 0 21

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TABLE 3-1: RADIOLOGICAL ENVIRONMENT..'AL MONITORING PROGRAM

SUMMARY

r -,, Surry Power Station, Surry Co unty, Virginia - 2018

i Docket No. 50-280-281 Page 2 of7 Medium or Indicator Control

! -- i Pathway Analysis Locations Locatio_n_w_i_th_H-;,ig._h_e_s_t_M_e_a_n_ _ _L_o_ca_t_io_n_s_ Non-Routine I I Sampled ITotal Mean Distance Mean Mean Reported (Units) Type No. LLD Range Name I Direction Rane Ran e Measurements Milk Gamma 36

(pCi/Liter)

La-140 36 15 < LLD N/A < LLD < LLD 0 I

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Products

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(pCi/kg wet) K-40 3 9620 (3/3) 3.2mi 18300 (1/1) N/A 0 I

(4450 -18200) Slade s (18300 -.18300)

Be-7 3 < LLD N/A < LLD N/A 0 L

Th-228 3 < LLD N/A < LLD N/A 0 I

1-131 3 60 < LLD N/A < LLD N/A 0 I

Cs-134 3 60 < LLD N/A < LLD N/A 0 i

i Cs-137 3 80 < LLD N/A < LLD N/A 0 Well H-3 12 2000 < LLD N/A < LLD N/A 0 I Water (pCi/Liter) ------------------------------------------------------------------------

I I Gamma 12 I

' - Mn-54 12 15 < LLD N/A < LLD N/A 0 Co-58 12 15 < LLD N/A < LLD N/A 0 I

', I Fe-59 12 30 < LLD N/A < LLD N/A 0 I

r' ...... ~n.

\,JV""VV 12 15 < LLD NIA < LLD N/A 0

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Zn-65 12 30 < LLD N/A < LLD N/A 0 I

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i, I TABLE 3-1: RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

Surry Power Station, Surry County, Virginia - 2018 Docket No. 50-280-281 Page 3 of7 Medium or Indicator Control Pathway Analysis Locations Location with Hi~hest Mean Locations Non-Routine Sampled (Units) Type ITotal No. LLD Mean Range Name I Distance Direction I Mean Range Mean Range Reported Measurements I Well I

I Nb-95 12 15 < LLD N/A < LLD N/A 0

Water (pCi/Liter)

Zr-95 12 30 < LLD N/A < LLD N/A 0 1-131 12 < LLD N/A < LLD N/A 0 Cs-134 12 15 < LLD N/A < LLD N/A 0 Cs-137 12 18 < LLD N/A < LLD N/A 0 Ba-140 12 60 < LLD N/A < LLD N/A 0 La-140 12 15 < LLD N/A < LLD N/A 0 River H-3 8 2000 < LLD N/A < LLD < LLD 0 Water (pCi/Liter) -------------------------------------------------------------------------------------------------------------------------------------------------------

Gamma 24 K-40 24 88.9 (2/12) SD 0.4mi 88.9 (2/12) 127 (1/12) 0 (62.8 -115) NW (62.8 - 115) (127 - 127)

Ra-226 24 < LLD N/A < LLD < LLD 0 Th-228 24 20.9 (1/12) SD 0.4 mi 20.9 (1/12) < LLD 0 (20.9 - 20.9) NW (20.9 - 20.9)

I Mn-54 24 15 < LLD N/A < LLD < LLD 0 L ___

Co-58 24 15 < LLD N/A < LLD < LLD 0 Fe-59 2'1 30 < LLD NIA < LLD < LLD 0 i

I__

Co-60 24 15 < LLD N/A < LLD < LLD 0 Zn-65 24 30 < LLD N/A < LLD < LLD 0 i

I 23

TABLE 3-1: RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

Surry Power Station, Surry County, Virginia - 2018 Docket No. 50-280-281 Page 4 of7 Medium or Indicator Control Pathway Analysis Locations Location with Hh:1hest Mean Locations Non-Routine Sampled (Units) Type ITotal No. LLD Mean Range Name I Distance Direction I Mean Range Mean Range Reported Measurements River Nb-95 24 15 < LLD N/A < LLD < LLD 0 Water (pCi/Liter)

Zr-95 24 30 < LLD N/A < LLD < LLD 0 1-131 24 10 < LLD N/A < LLD < LLD 0 Cs-134 24 15 < LLD N/A < LLD < LLD 0 Cs-137 24 18 < LLD N/A < LLD < LLD 0 Ba-140 24 60 < LLD N/A < LLD < LLD 0 La-140 24 15 < LLD N/A < LLD < LLD 0 Silt Gamma 6 (pCilkg dry)

Be-7 6 2140 (1/2) SI 1.8 mi 2695 (3/4) 0

<LLD (1030 - 3270) ESE (2120 - 3270)

K-40 6 17000 (4/4) SI 1.8 mi 17000 (4/4) 18100 (2/2) 0 (16600-17400) ESE (16600-17400) (16700-19500)

Cs-134 6 150 < LLD N/A < LLD < LLD 0 Cs-137 6 180 161 (4/4) SD 1.3 mi 186 (4/4) < LLD 0 (52-161) NNW (91 - 281)

Ra-226 6 3527 (3/4) SI 1.8 mi 3970 (3/4) 3100 (2/2) 0 (3230 - 3970) ESE (3970 - 3970) (2440 - 3760)

Th-228 6 1460 (4/4) SI 1.8 mi 1460 (4/4) 1600 (2/2) 0 (1440 - 1480) ESE (1440 - 1480) (1510 - 1690)

Th-232 6 1058 (3/4) SI 1.8 mi 1330 (3/4) 1405 (2/2) 0 (774 - 1330) ESE (1330 - 1330) (1310 -1500)

Ac-228 6 1280 (1/4) SI 1.8 mi 1280 (1/4) <LLD 0 (1280 - 1280) ESE (1280 -1280)

I I 24

TABLE 3-1: RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

Surry Power Station, Surry County, Virginia - 2018 Docket No. 50-280-281 Page 5 of7 Medium or Indicator Control Pathway Analysis Locations Location with Highest Mean Locations Non-Routine Sampled (Units) Type ITotal No. LLD Mean Range Name Direction I Distance I Mean Range Mean Range Reported Measurements

,- ' 0 Shoreline K-40 4 8635 (2/2) HIR 0.6mi 8635 (2/2) 2540 (2/2)

Sediment (7520 - 9750) N (7520 - 9750) (1200 - 3880)

(pCilkg dry)

Cs-134 4 150 < LLD N/A < LLD < LLD 0 Cs-137 4 180 <LLD N/A < LLD <LLD 0 Ra-226 4 < LLD CHIC 11.2 mi 1450 (1/2) 1450 (1/2) 0 WNW (1450 - 1450) (1450 - 1450)

Th-228 4 187 (2/2) HIR 0.6mi 187 (2/2) 994 (1/2) 0 (134 - 240) N (134 - 240) (994 - 994)

Th-232 4 < LLD CHIC 11.2 mi 1260 (1/2) 1260 (1/2) 0 WNW (1260 -1260) (1260 - 1260)

Fish Gamma 4 (pCilkg wet)

K-40 4 1873 (4/4) SD 1.3 mi 1873 (4/4) N/A 0 (1240 - 2320) NNW (1240 - 2320)

Mn-54 4 130 < LLD N/A < LLD N/A 0 Co-58 4 130 <LLD N/A < LLD N/A 0 Fe-59 4 260 < LLD N/A < LLD N/A 0

-- Co-60 4 130 < LLD N/A < LLD N/A 0 Zn-65 4 260 < LLD N/A < LLD N/A 0 Cs-134 4 130 < LLD N/A < LLD N/A 0 Cs-137 4 150 <LLD N/A < LLD N/A 0 25

TABLE 3-1: RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

Surry Power Station, Surry County, Virginia - 2018 Docket No. 50-280-281 Page 6 of7 Medium or Indicator Control Pathway Analysis Locations Location with Highest Mean Locations Non-Routine Sampled ITotal Mean I Distance I Mean Mean Reported

. .,__L_L_D_.___R_a_n_,.g:....e_ __.__N_a_m_e___._D_ir_e_c_ti_o_n...,___.;...R;.;..;a_ng"""e_ __,.___R_a_n...._~e_ _._M---'-e-as_urements

....___,_(U_n_its_,_)_ _.__T......._vp_e_...._N_o_

I Oysters Gamma 6 l i (pCi/kg wet)

K-40 6 736 (3/6) MP 4.9mi 736 (3/6) N/A 0 (736

736) ESE (736

736)

Mn-54 6 130 < LLD N/A < LLD N/A 0 Fe-59 6 260 < LLD N/A < LLD N/A 0 Co-58 6 130 < LLD N/A < LLD N/A 0 Co-60 6 130 < LLD N/A < LLD N/A 0

! I Zn-65 6 260 < LLD N/A < LLD N/A 0 I :

Cs-134 6 130 < LLD N/A < LLD N/A 0 Cs-137 6 150 < LLD N/A < LLD N/A 0 Clams Gamma 6 (pCi/kg wet)

K-40 6 < LLD N/A < LLD < LLD 0 Mn-54 6 130 < LLD N/A < LLD < LLD 0 I

Co-58 6 130 < LLD N/A < LLD < LLD 0 Fe-59 6 260 < LLD N/A < LLD < LLD 0 Co-60 6 130 < LLD N/A < LLD < LLD 0 Zn-65 6 260 < LLD N/A < LLD < LLD 0 Cs-134 6 130 < LLD N/A < LLD < LLD 0 Cs-137 6 150 < LLD N/A < LLD < LLD 0 I

26

I TABLE 3-1: RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

Surry Power Station, Surry County, Virginia - 2018 Docket No. 50-280-281 Page 7 of7 Medium or Indicator Control Pathway Analysis Locations Location with Highest Mean Locations Non-Routine Sampled (Units) Type ITotal No. LLD Mean Range Name IDistance Direction I Mean Range Mean Range Reported Measurements Crabs Gamma 1 i I (pCilkg wet)

I K-40 1 SD 1.3 mi 1400 (1/1) N/A 0 1400 (1/1)

(1400 - 1400) NNW (1400 - 1400)

Mn-54 1 130 < LLD N/A < LLD N/A 0 Co-58 1 130 < LLD N/A < LLD N/A 0 Fe-59 1 260 < LLD N/A < LLD N/A 0 Co-60 1 130 < LLD N/A < LLD N/A 0 Zn-65 260 < LLD N/A < LLD N/A 0 Cs-134 1 130 < LLD N/A < LLD N/A 0 Cs-137 150 < LLD N/A < LLD N/A 0 I !

' __ J 27

__ I

I

3.2 Analytical Results of 2018 REMP Samples

, Radiological analyses of environmental media characteristically approach and frequently 1 , 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, 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 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 i

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

Data are given according to sample type as indicated below.

1. Gamma Exposure Rate

2. Air Particulates, Weekly Gross Beta Radioactivity

3. Air Particulates, Weekly 1-131

4. Air Particulates, Quarterly Gamma Spectroscopy

5. Animal Milk

6. Food Products

7. Well Water

8. River Water

9. Silt

10. Shoreline Sediment

11. Fish

12. Oysters

13. Clams

14. Crabs

! I l __ _

28

I i TABLE 3-2: GAMMA EXPOSURE RATE Surry Power Station, Surry County, Virginia- 2018 MDDu = 3 XO"u = 3 X 1.0 =5 Note: IF MD Du< 5 mR, THEN MDDu rounded to 5 mR (ANSI N13.37)

MDDA = 3 x O"A = 3 X 2.3 = 10 Note: IF MDDA < 10 mR, THEN MDDA rounded to 10 mR (ANSI N13.37)

Mani- Quarterly Normalized Quarterly Quarterly Facility Annual Annual Annual taring Baseline, Monitoring Data, Mn Dose,- Base- Moni- Facility Loca- Bn (mrem per standard Fn= Mn-Bn line, BA taring Dose,-

I----,

tion Baseline, quarter) (mrem) (mrem) Data, FA=

i i (mrem) MA MA-BA 1 2 3 4 1 2 3 4 (mrem) (mrem) 2 19.8 18.9 19.8 20.1 19.2 ND ND ND ND 79.2 78.0 ND 3 19.2 18.6 19.8 20.5 18.6 ND ND ND ND 76.9 77.4 ND 4 17.9 17.1 19.4 19.8 16.7 ND ND ND ND 71.7 72.9 ND 5 19.0 18.0 19.8 20.5 18.0 ND ND ND ND 76.0 76.2 ND 6 18.4 17.7 18.9 19.0 17.3 ND ND ND ND 73.8 73.0 ND 7 18.7 17.7 19.4 19.0 17.3 ND ND ND ND 74.6 73.4 ND 8 17.0 16.8 17.7 17.2 15.8 ND ND ND ND 68.4 67.5 ND 9 23.2 21.9 23.5 24.8 22.0 ND ND ND ND 92.8 92.2 ND 10 18.1 16.8 19.4 18.7 17.0 ND ND ND ND 72.5 71.9 ND 11 16.1 15.3 16.5 17.2 15.5 ND ND ND ND 64.2 64.5 ND 12 i6.6 15.9 17.7 17.6 15.2 ND ND ND ND 66.4 66.4 ND 13 18.6 18.0 19.4 18.0 18.3 ND ND ND ND 74.5 73.6 ND 14 17.9 16.8 18.5 20.1 17.7 ND ND ND ND 71.6 73.1 ND 15 18.5 17.7 18.9 19.0 18.0 ND ND ND ND 74.1 73.7 ND I i 16 17.0 16.2 18.1 18.7 16.4 ND ND ND ND 67.7 69.4 ND 18 14.5 14.1 15.0 15.8 14.8 ND ND ND ND 58.0 59.7 ND 19 15.5 14.7 16.1 15.9 14.8 ND ND ND ND 62.1 61.5 ND 20 14.3 13.8 14.6 14.8 13.9 ND ND ND ND 57.4 57.0 ND 21 15.1 13.8 15.7 16.6 14.8 ND ND ND ND 60.5 60.9 ND 22 13.2 12.6 13.8 14.8 12.7 ND ND ND ND 52.7 53.8 ND 23 18.1 17.7 19.7 18.8 17.6 ND ND ND ND 72.3 73.7 ND 24 14.8 14.1 15.3 16.2 15.1 ND ND ND ND 59.2 60.8 ND 25 18.1 17.7 18.9 18.8 17.6 ND ND ND ND 72.3 73.0 ND 26 15.7 15.0 15.7 16.6 14.8 ND ND ND ND 62.9 62.1 ND 27 14.7 14.4 14.9 14.4 14.2 ND ND ND ND 58.7 58.0 ND 28 14.2 13.5 14.6 15.1 13.6 ND ND ND ND 56.8 56.8 ND 29 13.2 12.6 14.2 14.4 12.7 ND ND ND ND 52.9 53.8 ND 30 14.4 13.8 15.3 15.1 13.6 ND ND ND ND 57.7 57.9 ND 31 12.3 12.0 13.0 13.7 12.1 ND ND ND ND 49.2 50.7 ND 32 15.2 14.7 15.3 15.5 14.0 ND ND ND ND 60.7 59.5 ND 33 14.2 14.4 15.3 16.8 14.0 ND ND ND ND 57.1 60.6 ND 34 16.0 15.6 18.1 17.9 15.5 ND ND ND ND 64.1 67.1 ND 35 18.6 18.0 19.3 20.8 18.6 ND ND ND ND 74.4 76.7 ND 36 18.6 18.0 20.1 20.8 18.3 ND ND ND ND 74.4 77.2 ND 37 15.4 15.0 16.5 17.6 14.9 ND ND ND ND 61.7 64.0 ND 38 20.9 19.8 21.6 21.9 19.5 ND ND ND ND 83.6 82.9 ND 39 14.9 14.7 16.5 15.8 14.3 ND ND ND ND 59.7 61.3 ND 40 16.2 15.3 16.9 17.2 15.8 ND ND ND ND 64.7 65.2 ND 41 21.8 20.7 22.8 22.6 21.1 ND ND ND ND 87.3 87.2 ND 42 16.4 15.6 16.9 17.6 16.1 ND ND ND ND 65.5 66.2 ND 43 14.3 13.8 15.3 14.7 14.0 ND ND ND ND 57.3 57.8 ND "ND= Not detected, where Mu< (Bu+ MDDul bND = Not detected, where MA< (BA+ MDDA)

I d = Damaged TLDs; m = Missing TLDs; v = Vendor reports TLD not received N/A = Missing or Damaged TLD Reading Not Available for Calculation Note: Table formatted in accordance with ANSI/HPS N13.37-2014, Environmental Dosimetry -

' Criteria for system Design and Implementation.

' 29

- - I

__ J TABLE 3-3: GROSS BETA CONCENTRATION IN FILTERED AIR Surry Nuclear Power Station, Surry County, Virginia - 2018 1.0E-3 pCi/m3 +/- 2 Sigma Page 1 of2 COLLECTION SAMPLING LOCATIONS DATE ss HIR BC ALL CP BASF FE NN-C January 02 16.8 +/- 2.77 19.3 +/- 2.90 18.6 +/- 2.86 18.9 +/- 2.83 18.9 +/- 2.83 20.1 +/- 2.87 19.4 +/- 2.87 19.9 +/- 2.92 January 09 19.3 +/- 3.12 19.5 +/- 3.15 18.6 +/- 3.15 19.4 +/- 3.13 17.2 +/- 3.00 19.6 +/- 3.10 19.4 +/- 3.11 19.4 +/- 3.12 January 16 11.2 +/- 2.49 11.8 +/- 2.54 14.5 +/- 2.80 16.1 +/- 2.85 12.1 +/- 2.60 13.7 +/- 2.72 15.7 +/- 2.88 13.2 +/- 2.70 January 23 20.3 +/- 3.02 25.6 +/- 3.32 23.2 +/- 3.21 26.3 +/- 3.30 25.1 +/- 3.24 26.2 +/- 3.28 24.0 +/- 3.21 22.2 +/- 3.07 January 29 8.34 +/- 2.68 8.95 +/- 2.69 9.16 +/- 2.67 6.68 +/- 2.43 6.61 +/- 2.46 6.75 +/- 2.44 7.99 +/- 2.55 9.70 +/- 2.65 February 05 7.74 +/- 2.36 8.45 +/- 2.40 8.86 +/- 2.55 9.08 +/- 2.49 9.54 +/- 2.52 10.7 +/- 2.57 8.68 +/- 2.50 8.37 +/- 2.46 February 12 11.8 +/- 2.62 11.7 +/- 2.58 13.2 +/- 2.66 13.3 +/- 2.60 13.4 +/- 2.63 13.5 +/- 2.62 13.3 +/- 2.66 13.2 +/- 2.63 February 19 12.6 +/- 2.66 14.8 +/- 2.76 11.0 +/- 2.58 12.4 +/- 2.62 12.6 +/- 2.61 11.6 +/- 2.55 12.4 +/- 2.63 11.0 +/- 2.55 February 26 8.44 +/- 2.47 9.31 +/- 2.50 7.54 +/- 2.41 10.2 +/- 2.54 6.98 +/- 2.31 9.17 +/- 2.44 10.6 +/- 2.58 10.0 +/- 2.51 March 06 14.8 +/- 2.57 19.7 +/- 2.80 17.2 +/- 2.72 17.8 +/- 2.92 17.1 +/- 2.64 20.2 +/- 2.79 18.8 +/- 2.75 18.0 +/- 2.68 March 12 12.4 +/- 2.95 12.7 +/- 2.94 8.63 +/- 2.74 9.56 +/- 2.73 10.4 +/- 2.79 14.6 +/- 3.05 12.5 +/- 2.97 11.9 +/- 2.91 March 20 15.2 +/- 2.50 14.6 +/- 2.43 13.1 +/- 2.37 16.1 +/- 2.50 14.6 +/- 2.42 16.2 +/- 2.49 17.6 +/- 2.61 14.2 +/- 2.41 March 26 8.36 +/- 2.48 6.09 +/- 2.26 8.25 +/- 2.45 7.49 +/- 2.36 9.71 +/- 2.53 12.4 +/- 2.68 9.54 +/- 2.55 11.8 +/- 2.71 Qtr. Avg.+/- 2 s.d. 12.9 +/- 8.4 14.0 +/- 11.2 13.2 +/- 9.9 14.1 +/- 11.3 13.4 +/- 10.4 15.0 +/- 10.7 14.6 +/- 9.9 14.1 +/- 8.8 April 03 12.4 +/- 2.42 11.3 +/- 2.31 8.10 +/- 2.15 11.1 +/- 2.30 9.50 +/- 2.21 15.3 +/- 2.49 9.28 +/- 2.18 12.6 +/- 2.38 April 10 17.8 +/- 2.85 17.8 +/- 2.80 20.1 +/- 2.95 18.6 +/- 2.84 17.2 +/- 2.76 18.1 +/- 2.80 19.7 +/- 2.91 17.0 +/- 2.78 April 17 15.0 +/- 2.81 16.2 +/- 2.83 13.3 +/- 2.71 11.4 +/- 2.55 14.6 +/- 2.74 15.6 +/- 2.79 12.8 +/- 2.66 13.8 +/- 2.70 April 24 12.6 +/- 2.72 11.3 +/- 2.61 13.7 +/- 2.79 10.3 +/- 2.55 9.45 +/- 2.49 12.7 +/- 2.68 12.0 +/- 2.66 15.0 +/- 2.81 May01 12.2 +/- 2.74 12.8 +/- 2.73 11.5 +/- 2.70 11.8 +/- 2.67 13.5 +/- 2.77 11.9 +/- 2.65 10.4 +/- 2.59 12.5 +/- 2.71 May08 16.7 +/- 2.75 16.7 +/- 2.70 17.1 +/- 2.84 16.1 +/- 2.73 19.2 +/- 2.90 17.6 +/- 2.82 17.5 +/- 2.84 14.8 +/- 2.67 May 15 15.9 +/- 3.02 17.3 +/- 3.06 16.9 +/- 3.02 15.4 +/- 2.87 14.8 +/- 2.85 18.6 +/- 3.04 14.6 +/- 2.87 16.3 +/- 2.95 May22 6.59 +/- 2.34 6.88 +/- 2.33 5.89 +/- 2.31 4.47 +/- 2.15 6.78 +/- 2.31 6.52 +/- 2.31 3.21 +/- 2.07 6.48 +/- 2.30 May29 10.9 +/- 2.57 12.8 +/- 2.65 10.7 +/- 2.57 8.24 +/- 2.35 9.88 +/- 2.45 12.4 +/- 2.60 7.03 +/- 2.29 10.0 +/- 2.48 June 04 7.95 +/- 3.00 7.79 +/- 2.94 6.36 +/- 2.88 6.04 +/- 2.77 7.68 +/- 2.89 5.21 +/- 2.68 4.15 +/- 2.64 4.70 +/- 2.67 June 12 12.4 +/- 2.56 11.8 +/- 2.49 11.7 +/- 2.54 13.1 +/- 2.57 13.0 +/- 2.56 14.8 +/- 2.68 14.4 +/- 2.67 13.5 +/- 2.62 June 18 13.3 +/- 2.87 15.0 +/- 2.94 12.1 +/- 2.81 13.1 +/- 2.83 12.2 +/- 2.74 15.5 +/- 2.97 16.7 +/- 3.05 15.4 +/- 2.96 June 26 13.4 +/- 2.56 11.9 +/- 2.44 11.5 +/- 2.43 9.78 +/- 2.28 8.23 +/- 2.18 11.7 +/- 2.39 9.54 +/- 2.28 12.4 +/- 2.42 Qtr. Avg. +/- 2 s.d. 12.9 +/- 6.4 13.0 +/- 6.9 12.2 +/- 8.3 11.5 +/- 7.9 12.0 +/- 7.6 13.5 +/- 8.2 11.6 +/- 10.0 12.7 +/- 7.3 30

____ )

TABLE 3-3: GROSS BETA CONCENTRATION IN FILTERED AIR Surry Nuclear Power Station, Surry County, Virginia - 2018 1.0E-3 pCi/m3 +/- 2 Sigma Page 2 of2 COLLECTION SAMPLING LOCATIONS DATE 55 HIR BC ALL CP BASF FE NN July 03 15.8 +/- 2.97 19.4 +/- 3.12 14.1 +/- 2.89 14.4 +/- 2.83 15.9 +/- 2.90 17.4 +/- 2.96 14.2 +/- 2.83 14.7 +/- 2.85 July 10 1.61 +/- 1.90 B 14.9 +/- 2.76 14.1 +/- 2.77 11.7 +/- 2.56 11.8 +/- 2.56 14.6 +/- 2.73 12.7 +/- 2.64 13.4 +/- 2.66 July 17 18.2 +/- 2.96 18.4 +/- 2.92 16.9 +/- 2.90 17.1 +/- 2.85 27.7 +/- 3.38 20.8 +/- 3.04 16.9 +/- 2.99 17.1 +/- 2.87 July 23 10.5 +/- 2.57 13.0 +/- 2.70 11.8 +/- 2.68 12.7 +/- 2.77 11.1 +/- 2.56 13.9 +/- 2.75 9.44 +/- 2.47 11.7 +/- 2.61 July 30 8.39 +/- 2.37 11.2 +/- 2.52 10.4 +/- 2.52 10.9 +/- 2.48 10.5 +/- 2.47 11.1 +/- 2.51 9.87 +/- 2.45 9.07 +/- 2.41 August 06 7.62 +/- 2.31 8.99 +/- 2.36 7.60 +/- 2.32 5.71 +/- 2.13 7.18 +/- 2.23 6.87 +/- 2.17 6.45 +/- 2.15 7.32 +/- 2.22 August 13 17.1 +/- 2.73 16.7 +/- 2.66 19.0 +/- 2.90 15.6 +/- 2.65 15.3 +/- 2.64 17.5 +/- 2.80 13.3 +/- 2.56 16.3 +/- 2.74 August 20 19.8 +/- 3.10 19.2 +/- 3.00 19.3 +/- 2.99 18.3 +/- 2.87 16.6 +/- 2.80 22.0 +/- 3.06 17.0 +/- 2.80 16.0 +/- 2.76 August 27 16.1 +/- 2.55 17.7 +/- 2.62 19.0 +/- 2.75 15.8 +/- 2.51 17.9 +/- 2.64 17.9 +/- 2.63 15.2 +/- 2.48 18.4 +/- 2.66 September 04 11.5 +/- 2.25 14.7 +/- 2.41 12.8 +/- 2.34 13.4 +/- 2.31 12.2 +/- 2.25 16.9 +/- 2.48 12.3 +/- 2.24 10.4 +/- 2.13 September 11 10.2 +/- 2.38 14.4 +/- 2.59 13.0 +/- 2.58 12.9 +/- 2.52 9.96 +/- 2.34 14.8 +/- 2.67 10.6 +/- 2.40 12.7 +/- 2.53 September 18 5.05 +/- 2.27 8.25 +/- 2.43 7.41 +/- 2.43 5.63 +/- 2.25 5.56 +/- 2.24 6.66 +/- 2.33 3.61 +/- 2.12 4.79 +/- 2.19 September 24 14.9 +/- 2.88 16.1 +/- 2.91 16.7 +/- 3.00 16.6 +/- 2.92 14.7 +/- 2.81 16.6 +/- 2.93 15.9 +/- 2.89 13.9 +/- 2.79 Qtr. Avg. +/- 2 s.cl. 12.9 +/- 9.4 14.8 +/- 7.3 14.0 +/- 8.1 13.1 +/- 7.9 13.6 +/- 11.2 15.2 +/- 9.3 12.1 +/- 8.1 12.8 +/- 8.0 October 02. 12.1 +/- 2.39 13.9 +/- 2.45 13.7 +/- 2.48 13.2 +/- 2.41 13.2 +/- 2.39 14.6 +/- 2.45 12.1 +/- 2.32 13.5 +/- 2.39 October 09 18.8 +/- 2.94 20.1 +/- 2.99 21.3 +/- 3.08 18.9 +/- 2.88 19.2 +/- 2.89 28.1 +/- 3.32 20.0 +/- 2.97 20.3 +/- 3.00 October 16 10.8 +/- 2.57 12.6 +/- 2.66 8.80 +/- 2.46 8.48 +/- 2.38 9.46 +/- 2.45 10.9 +/- 2.73 10.7 +/- 2.68 11.8 +/- 2.60 October 23 12.9 +/- 2.59 13.7 +/- 2.62 12.7 +/- 2.61 12.7 +/- 2.54 11.0 +/- 2.44 12.0 +/- 2.49 12.9 +/- 2.56 14.3 +/- 2.62 October 30 8.30 +/- 2.35 10.7 +/- 2.46 8.69 +/- 2.41 8.16 +/- 2.32 7.79 +/- 2.30 9.37 +/- 2.40 8.40 +/- 2.36 9.67 +/- 2.45 November 06 12.4 +/- 2.55 12.8 +/- 2.54 12.2 +/- 2.55 11.6 +/- 2.48 11.6 +/- 2.48 13.5 +/- 2.56 13.4 +/- 2:58 10.6 +/- 2.41 November 13 9.71 +/- 2.55 11.8 +/- 2.63 12.9 +/- 2.75 11.9 +/- 2.64 11.1 +/- 2.59 14.4 +/- 2.77 12.9 +/- 2.70 12.4 +/- 2.67 November 20 16.4 +/- 2.81 16.5 +/- 2.79 18.3 +/- 2.94 15.5 +/- 2.75 18.2 +/- 2.89 19.6 +/- 2.94 15.0 +/- 2.71 14.2 +/- 2.68 November 27 13.4 +/- 2.65 16.9 +/- 2.83 17.3 +/- 2.90 16.0 +/- 2.79 15.7 +/- 2.77 20.1 +/- 2.99 17.4 +/- 2.86 17.5 +/- 2.86 December 04 10.8 +/- 2.53 12.1 +/- 2.59 15.9 +/- 2.85 10.9 +/- 2.52 14.6 +/- 2.72 13.9 +/- 2.67 13.5 +/- 2.66 12.7 +/- 2.62 December 11 10.4 +/- 2.63 13.9 +/- 2.80, 12.6 +/- 2.80 13.7 +/- 2.79 13.6 +/- 2.97 17.1 +/- 3.02 14.2 +/- 2.97 12.6 +/- 2.73 December 18 19.5 +/- 3.11 21.3 +/- 3.18 21.8 +/- 3.30 14.5 +/- 2.97 21.6 +/- 3.20 22.9 +/- 3.25 19.8 +/- 3.11 20.9 +/- 3.17 December 24 8.86 +/- 2.77 11.2 +/- 2.88 8.74 +/- 2.80 7.26 +/- 2.67 10.6 +/- 2.87 11.6 +/- 2.92 10.8 +/- 2.87 10.3 +/- 2.84 January 02 13.7 +/- 2.29 13.3 +/- 2.25 12.9 +/- 2.27 13.3 +/- 2.25 13.5 +/- 2.26 14.8 +/- 2.31 12.9 +/- 2.21 13.4 +/- 2.26 A=<MDC; B = Vi8ual inspection indicated very little particulate material on filter.

Qtr. Avg. +/- 2 s.d. 12.7 +/- 6.9 14.3 +/- 6.4 14.1 +/- 8.6 12.6 +/- 6.4 13.7 +/- 7.8 15.9 +/- 10.3 13.9 +/- 6.6 13.9 +/- 6.9 31

TABLE 3-4: IODINE-131 CONC]iNTRATION IN FILTERED AIR Surry Power Station, Surry County, Virginia - 2018 1.0E-3 pCi/m3 +/- 2 Sigma Page 1 of2 COLLECTION SAMPLING LOCATIONS DATE I ss HIR BC ALL CP BASF FE NN-C January 02 -0.~18 +/- 17.7 -0.98 +/- 17.7 -0.98 +/- 17.8 -0.96 +/- 17.3 -5.03 +/- 10.9 -4.96 +/- 10.8 -5.04 +/- 11.0 -5.08 +/- 11.0 January 09 24.3 +/- 20.5 24.4 +/- 20.6 24.9 +/- 21.0 24.2 +/- 20.5 -10.3 +/- 19.0 -10.1 +/- 18.7 -10.2 +/- 18.8 -10.2 +/- 18.9 January 16 6.22 +/- 16.1 6.30 +/- 16.3 6.67 +/- 17.2 6.53 +/- 16.9 -4.57 +/- 17.3 -4.60 +/- 17.4 -4.71 +/- 17.8 -4.60 +/- 17.4 JaJluary 23 -5.B7 +/- 17.9 -6.03 +/- 18.5 -6.07 +/- 18.6 -5.90 +/- 18.1 -4.40 +/- 17.9 -4.35 +/- 17.7 -4.43 +/- 18.0 -4.30 +/- 17.5 January 29 9.fi5 +/- 16.9 9.51 +/- 16.8 9.32 +/- 16.5 9.02 +/- 15.9 3.39 +/- 21.7 3.32 +/- 21.3 3.36 +/- 21.5 3.32 +/- 21.2 February 05 12.6 +/- 16.6 12.6 +/- 16.5 13.5 +/- 17.7 13.0 +/- 17.1 6.39 +/- 19.7 6.30 +/- 19.4 6.46 +/- 19.9 6.38 +/- 19.7 February 12 -12.1 +/- 18.7 -11.9 +/- 18.4 -11.9 +/- 18.4 -11.5 +/- 17.8 -1.71 +/- 11.1 -1.69 +/- 11.0 -1.73 +/- 11.2 -1.70 +/- 11.0 February 19 -3.!36 +/- 19.1 -3.91 +/- 18.9 -3.98 +/- 19.3 -3.89 +/- 18.8 0.41 +/- 11.6 0.41 +/- 11.5 0.42 +/- 11.7 0.42 +/- 11.7 February 26 -5.!36 +/- 16.8 -5.88 +/- 16.6 -5.96 +/- 16.8 -5.81 +/- 16.4 -4.10 +/- 10.1 -4.07 +/- 10.0 -4.15 +/- 10.2 -4.08 +/- 10.0 March 06 -8.49 +/- 14.5 -8.33 +/- 14.2 -8.51 +/- 14.6 -9.33 +/- 16.0 1.30 +/- 9.50 1.28 +/- 9:38 1.30 +/- 9.54 1.28 +/- 9.38 March 12 -8.!54 +/- 19.2 -8.40 +/- 18.9 -8.60 +/- 19.3 -8.30 +/- 18.7 -10.3 +/- 12.8 -10.3 +/- 12.8 -10.6 +/- 13.1 -10.4 +/- 12.8 March 20 -0.:28 +/- 12.5 -0.27 +/- 12.2 -0.28 +/- 12.4 -0.27 +/- 12.1 7.35 +/- 14.3 2.57 +/- 5.00 7.47 +/- 14.5 7.38 +/- 14.4 March 26 1Sl.4 +/- 17.9 A 19.0 +/- 17.5 A 19.2 +/- 17.6 A 18.8 +/- 17.3 A 1.42 +/- 11.7 1.40 +/- 11.5 1.45 +/- 11.9 1.45 +/- 11.9 April 03 -6.:50 +/- 14.7 -6.33 +/- 14.3 -6.45 +/- 14.6 -6.32 +/- 14.3 0.66 +/- 9.03 0.64 +/- 8.75 0.65 +/- 8.89 0.65 +/- 8.88 April 10 17'.9 +/- 20.6 17.4 +/- 20.0 17.6 +/- 20.3 17.3 +/- 19.9 -0.63 +/- 12.7 '-0.62 +/- 12.5 -0.63 +/- 12.7 -0.63 +/- 12.7 April 17 -8.155 +/- 17.4 -8.46 +/- 17.0 -8.62 +/- 17.3 -8.41 +/- 16.9 -0.43 +/- 11.5 -0.43 +/- 11.4 -0.44 +/- 11.6 -0.43 +/- 11.5 April 24 -Hi.6 +/- 21.9 -15.3 +/- 21.4 -15.6 +/- 21.9 1.93 +/- 16.2 1.92 +/- 16.1 -6.31 +/- 8.85 1.93 +/- 16.2 1.58 +/- 13.3 May01 0.58 +/- 3.82 0.67 +/- 4.43 0.69 +/- 4.54 0.67 +/- 4.43 1.51 +/- 2.83 3.52 +/- 6.61 3.56 +/- 6.70 3.54 +/- 6.65 May08 2.78 +/- 8.11 7.67 +/- 22.4 8.22 +/- 24.0 7.97 +/- 23.3 2.98 +/- 10.5 5.49 +/- 19.3 5.56 +/- 19.5 5.47 +/- 19.3 May 15 -9.62 +/- 29.9 -9.44 +/- 29.3 -9.47 +/- 29.4 -9.14 +/- 28.4 -12.2 +/- 18.0 -12.2 +/- 17.9 -12.4 +/- 18.2 -12.3 +/- 18.0 May22 4.31 +/- 28.7 4.25 +/- 28.3 4.36 +/- 29.0 4.20 +/- 28.0 3.73 +/- 16.9 3.76 +/- 17.0 3.74 +/- 16.9 3.71 +/- 16.8 May29 10.4 +/- 25.6 10.3 +/- 25.1 10.5 +/- 25.6 10.1 +/- 24.7 1.11 +/- 6.10 1.10 +/- 6.09 1.12 +/- 6.16 1.11 +/- 6.13 June 04 -4.93 +/- 20.4 -4.83 +/- 20.0 -4.91 +/- 20.3 -4.73 +/- 19.6 -4.06 +/- 25.4 -1.66 +/- 10.4 -4.01 +/- 25.1 -3.98 +/- 24.9 June 12 -9.97 +/- 10.3 -9.78 +/- 10.1 -10.0 +/- 10.3 -9.79 +/- 10.1 3.09 +/- 8.82 3.11 +/- 8.89 3.13 +/- 8.95 3.11 +/- 8.89 June 18 1.10 +/- 19.1 1.08 +/- 18.8 1.10 +/- 19.1 1.08 +/- 18.7 -1.11 +/-22.4 -1.12 +/- 22.7 -1.13 +/- 22.8 -1.12 +/- 22.6 June 26 7.25 +/- 12.9 7.12 +/- 12.7 7.14 +/- 12.7 6.92 +/- 12.3 5.75 +/- 10.2 2.12+/-21.1 2.14 +/- 21.2 0.89 +/- 8.80 A: <MDC 32

TABLE 3-4: IODINE-131 CONCENTRATION IN FILTERED AIR Surry Power Station, Surry County, Virginia - 2018 1.0E-3 pCi/m3 +/- 2 Sigma Page 2 of2 COLLECTION SAMPLING LOCATIONS DATE I ss HIR BC ALL CP BASF FE NN-C July 03 -4.46 +/- 19.2 -4.39 +/- 18.9 -4.49 +/- 19.3 -4.34 +/- 18.6 -5.87 +/- 28.4 -5.81 +/- 28.1 -5.91 +/- 28.5 -5.87 +/- 28.4 July 10 16.0 +/- 23.4 15.6 +/- 22.8 16.0 +/- 23.4 15.4 +/- 22.6 -23.1 +/- 22.7 -23.1 +/- 22.7 -23.3 +/- 22.9 -22.9 +/- 22.5 July 17 -1.~19 +/- 22. 7 -1.35 +/- 22.1 -1.39 +/- 22.8 -1.35 +/- 22.1 8.42 +/- 28.6 8.34 +/- 28.3 8.98 +/- 30.5 8.38 +/- 28.4 July 23 -1.~11 +/- 9.83 -1.29 +/- 9.63 -1.32 +/- 9.89 -1.34 +/- 10.0 2.38 +/- 6.13 2.37 +/- 6.11 2.40 +/- 6.19 2.38 +/- 6.12 July 30 2.Ei9 +/- 19.7 2.65 +/- 19.4 2.72 +/- 19.9 2.62 +/- 19.2 6.72 +/- 14.6 6.69 +/- 14.5 6.75 +/- 14.6 6.77 +/- 14.7 August 06 10.4 +/- 22.3 10.2+/-21.8 10.5 +/- 22.4 10.1 +/-21.6 2.84 +/- 22.8 2.76 +/- 22.1 2.77 +/- 22.2 2.77 +/- 22.3 August 13 -2.87 +/- 11.7 -2.79 +/- 11.4 -3.00 +/- 12.2 -2.90 +/- 11.8 -19.6 +/- 16.8 -19.8 +/- 17.0 -19.8 +/- 17.0 -19.8 +/- 17.0 August 20 -UIO +/- 11.4 -1.26+/-11.0 -1.25+/-11.0 -1.21 +/- 10.6 0.79+/-16.1 0.78 +/- 15.8 0.78 +/- 15.8 0.79 +/- 15.9 August 27 18.4 +/- 16.8 A 18.0 +/- 16.5 A 18.5 +/- 16.9 A 18.0 +/- 16.5 A 7.70 +/- 12.2 7.66 +/- 12.1 7.68 +/- 12.2 7.60 +/- 12.1 September 04 -1.05 +/- 7.20 -1.03 +/- 7.05 -1.05 +/- 7.21 -1.01 +/- 6.94 -13.8 +/- 13.6 -13.5 +/- 13.3 -13.6 +/- 13.4 -13.5 +/- 13.4 September 11 -3.B9 +/- 23.3 -3.90 +/- 22.7 -4.03 +/- 23.5 -3.91 +/- 22.8 2.44 +/- 8.55 5.87 +/- 20.6 5.84 +/- 20.5 5.84 +/- 20.5 September 18 -5.72 +/- 15.5 -5.54 +/- 15.0 -5.72 +/- 15.5 -5.52 +/- 14.9 -5.13 +/- 12.3 -5.14 +/- 12.3 -5.15 +/- 12.3 -5.07 +/- 12.1 September 24 -2:16 +/- 19.9 -2.10 +/- 19.4 -2.16 +/- 19.9 -1.75 +/- 16.1 1.27 +/- 24.8 1.27 +/- 24.8 1.27 +/- 24.8 1.27 +/- 24.9 October 02 -1.139 +/- 6.50 -1.65 +/- 6.34 -1.68 +/- 6.49 -1.64 +/- 6.31 -2.87 +/- 5.26 -2.83 +/- 5.19 -2.83 +/- 5.19 -2.80 +/- 5.14 October 9 -0.85 +/- 10.7 -0.84 +/- 10.6 -0.85 +/- 10.7 -0.82 +/- 10.3 5.70 +/- 12.7 5.68 +/- 12.6 5.77 +/- 12.8 5.78 +/- 12.8 October 16 -13.0 +/- 32.5 -12.9 +/- 32.1 -13.1 +/- 32.7 -6.53 +/- 16.3 0.39 +/- 22.3 0.44 +/- 24.6 0.43 +/- 24.1 0.39 +/- 22.3 October 23 -3.:31 +/- 12.5 -3.27 +/- 12.4 -3.35 +/- 12.7 -3.22 +/- 12.2 14.4 +/- 18.5 14.4 +/- 18.5 14.4 +/- 18.5 5.99 +/- 7.68 October 30 2.!37 +/- 25.0 1.23 +/- 10.3 3.03 +/- 25.5 2.95 +/- 24.8 -11.1 +/- 16.1 -11.1 +/- 16.0 -11.2 +/- 16.2 -11.2 +/- 16.2 November 06 -4.!53 +/- 12.7 -4.45 +/- 12.5 -4.56 +/- 12.8 -4.46 +/- 12.5 7.91 +/- 17.2 7.79 +/- 17.0 7.87 +/- 17.1 7.86 +/- 17.1 November 13 12.7 +/- 15.9 12.5 +/- 15.6 12.8 +/- 16.0 12.5 +/- 15.6 -0.25 +/- 6.30 -0.21 +/- 5.23 -0.25 +/- 6.29 -0.25 +/- 6.27 November 20 -4.05 +/- 21.0 -4.01 +/- 20.8 -4.11 +/-21.3 -4.01 +/- 20.8 21.0 +/- 34.9 20.6 +/- 34.3 20.8 +/- 34.6 20.9 +/- 34.7 November 27 6.:35 +/- 8.79 6.28 +/- 8.70 6.44 +/- 8.93 6.30 +/- 8.73 -4.08 +/- 14.5 -4.06 +/- 14.4 -4.07 +/- 14.4 -4.05 +/- 14.4 December 04 5.53 +/- 11.2 5.46 +/- 11.0 5.59 +/- 11.3 5.45 +/- 11.0 -2.77 +/- 14.4 -2.29 +/- 11.9 -2.75 +/- 14.3 -2.75 +/- 14.3 December 11 1.39+/-16.2 1.37 +/- 15.9 1.41 +/- 16.5 1.37 +/- 15.9 21.5 +/- 28.4 20.1 +/- 26.5 21.2 +/- 28.0 19.6 +/- 25.9 December 18 -22.0 +/- 28.3 -21.7 +/- 27.9 -22.6 +/- 29.1 -23.3 +/- 29.9 -4.15 +/- 31.6 -4.12 +/- 31.4 -4.14+/-31.5 -4.14 +/- 31.5 December 24 -1fi.7 +/- 29.4 -6.48 +/- 12.2 -15.9 +/- 29.9 -15.7 +/- 29.5 13.7 +/- 23.7 13.6 +/- 23.5 13.6 +/- 23.5 13.5 +/- 23.4 January 2 -1.49 +/- 12.6 -1.48 +/- 12.5 -1.51 +/- 12.8 -1.47 +/- 12.4 -22.2.+/- 19.5 -21.9 +/- 19.2 -21.9 +/- 19.2 -22.1 +/- 19.4 A: <MDC 33

I I

TABLE 3-5: GAMMA EMITTER CONCENTRATION IN FILTERED AIR I

Surry Power Station, Surry County, Virginia - 2018 1.0E-3 pCi/m3 +/- 2 Sigma Page 1 of 1 SAMPLING FIRST SECOND THIRD FOURTH AVERAGE LOCATIONS NUCLIDE QUARTER QUARTER QUARTER QUARTER +/-2 SIGMA I

ss Cs-134 -0.76 +/- 1.06 0.23 +/- 0.63 -0.05 +/- 0.79 -0.17 +/- 0.80 I Cs-137 -0.04 +/- 0.83 0.05 +/- 0.63 0.14 +/- 0.52 -0.39 +/- 0.70 Be-7 174 +/- 36.4 148 +/- 23.8 116 +/- 25.3 88.9 +/- 19.4 132 +/- 74.2 HIR Cs-134 -0.22 +/- 1.18 -0.25 +/- 1.17 -0.56 +/- 1.35 -0.18 +/- 0.68 Cs-137 -0.42 +/- 0.93 -0.45 +/- 0.99 -0.40 +/- 1.07 0.25 +/- 0.54 Be-7 208 +/- 39.4 176 +/- 31.4 155 +/- 34.7 111 +/- 21.8 163+/-81.3 BC Cs-134 -1.18 +/- 0.96 0.81 +/- 0.93 -0.03 +/- 1.17 -0.15 +/- 0.62 Cs-137 0.04 +/- 0.82 -0.25 +/- 0.65 -0.05 +/- 1.11 0.21 +/- 0.58 Be-7 142 +/- 40.4 128 +/- 24.5 164 +/- 45.3 96.2 +/- 20.2 133 +/- 56.8 ALL Cs-134 -0.36 +/- 0.62 -0.46 +/- 0.85 -0.52 +/- 0.86 -0.05 +/- 0.75 Cs-137 0.47 +/- 0.59 0.32 +/- 0.74 0.14 +/- 0.74 -0.08 +/- 0.65 Be-7 163 +/- 23.9 132 +/- 24.9 101 +/- 26.0 96.5 +/- 20.7 123+/-61.8 CP Cs-134 0.16 +/- 1.14 -0.03 +/- 0.73 0.03 +/- 0.88 -0.49 +/- 0.66 Cs-137 -0.93 +/- 0.85 0.01 +/- 0.52 0.00 +/- 0.70 0.12 +/- 0.72 Be-7 124 +/- 36.0 156 +/- 22.7 126 +/- 27.8 91.7 +/- 22.5 124 +/- 52.5 BASF Cs-134 -0.35 +/- 1.07 0.48 +/- 0.78 -0.29 +/- 1.23 -0.57 +/- 0.64 Cs-137 0.17 +/- 0.70 0.02 +/- 0.66 -0.04 +/- 1.02 0.24 +/- 0.65 Be-7 156 +/- 37.9 179 +/- 31.2 122 +/- 34.5 145 +/- 24.7 151 +/- 47.4 l -0.29 +/- 1.17 -0.11 +/- 0.60

'I FE Cs-134 -0.36 +/- 1.09 -0.11 +/- 0.74 Cs-137 0.17 +/- 0.71 -0.89 +/- 0.72 0.33 +/- 1.16 -0.03 +/- 0.53 Be-7 159 +/- 38.7 125 +/- 24.2 126 +/- 36.4 88.5 +/- 19.2 125 +/- 57.6 NN-C Cs-134 -0.76 +/- 0.98 0.39 +/- 1.15 -0.73 +/- 1.09 -0.19 +/- 0.79 Cs-137 -0.17 +/- 0.89 -0.31 +/- 0.99 0.37 +/- 1.09 0.60 +/- 0.62 Be-7 187 +/- 36.2 151 +/- 32.7 111 +/- 41.1 107 +/- 20.6 139 +/- 75.3 K-40 17.9 +/- 13.7 18 13.7 A:< MDC I

34

l I

I I TABLE 3-6: GAMMA EMITTER AND STRONTIUM CONCENTRATIONS IN MILK Surry Power Station, Surry County, Virginia - 2018 pCi/Liter +/- 2 Sigma Page 1 of3 COLONIAL LOVERS NUCLIDE EPPS PARKWAY RETREAT-C JANUARY Cs-134 -1.30 +/- 5.36 -0.16 +/- 6.41 +/- B Cs-137 1.82 +/- 5.09 4.76 +/- 6.00 +/- B Ba-140 0.89 +/- 15.6 1.99 +/- 19.1 +/- B La-140 -1.39 +/- 5.96 3.12 +/- 4.93 +/- B 1-131 0.37 +/- 0.45 -0.17 +/- 0.43 +/- B K-40 1,330 +/- 200 1,250 +/- 171 +/- B FEBRUARY Cs-134 2.83 +/- 4.81 -0.64 +/- 4.84 +/- B Cs-137 -1.19 +/- 3.92 2.14 +/- 4.87 +/- B Ba-140 6.72 +/- 16.6 10.2 +/- 17.8 +/- B La-140 -2.07 +/- 3.68 -0.15 +/- 4.92 +/- B 1-131 0.36 +/- 0.53 0.11 +/- 0.30 +/- B K-40 1390 +/- 156 1230 +/- 161 +/- B MARCH Cs-134 0.95 +/- 4.84 2.26 +/- 7.75 5.02 +/- 6.52 Cs-137 1.05 +/- 4.82 1.94 +/- 6.16 1.01 +/- 5.24 Ba-140 -1.72 +/- 16.0 25.2 +/- 25.1 -4.40 +/- 25.3 La-140 -3.76 +/- 6.54 0.89 +/- 4.62 -4.56 +/- 8.33 1-131 0.45 +/- 0.48 0.00 +/- 0.54 -0.06 +/- 0.37 K-40 1390 +/- 215 1180 +/- 200 1430 +/- 224 Sr-89 3.23 +/- 2.10A Sr-90 0.29 +/- 0.49 APRIL Cs-134 -1.73 +/- 3.71 0.15 +/- 2.77 0.81 +/- 4.61 Cs-137 -1.29 +/- 3.80 0.81 +/- 3.36 -1.80 +/- 4.38 Ba-140 7.69 +/- 12.9 1.74 +/- 11.3 -3.88 +/- 15.8 La-140 0.49 +/- 4.32 -0.59 +/- 3.66 0.35 +/- 3.51 1-131 -0.39 +/- 0.48 -0.02 +/- 0.42 -0.59 +/- 0.36

K-40 1210 +/- 138 1140 +/- 114 1500 +/- 178 I '

I A: <MDC B: Milking animal (goat) is seasonaiiy unavaiiabie to produce milk.

I 35

i I TABLE 3-6: GAMMA EMITTER AND STRONTIUM CONCENTRATIONS IN MILK Surry Power Station, Surry County, Virginia - 2018 pCi/Liter +/- 2 Sigma Page 2 of3 COLONIAL LOVERS NUCLIDE EPPS PARKWAY RETREAT-C MAY Cs-134 0.53 +/- 4.96 -9.08 +/- 4.89 1.50 +/- 4.28 Cs-137 -0.42 +/- 4.03 3.04 +/- 4.93 -1.58 +/- 3.86 Ba-140 -12.4 +/- 17.9 6.07 +/- 18.4 -16.6 +/- 18.1 La-140 0.65 +/- 4.45 0.86 +/- 6.59 0.52 +/- 6.40 1-131 0.05 +/- 0.31 -0.15 +/- 0.27 -0.12 +/- 0.45 K-40 1050 +/- 144 1260 +/- 181 1540 +/- 174 JUNE Cs-134 1.19 +/- 4.33 0.03 +/- 4.85 0.69 +/- 4.60 Cs-137 -0.53 +/- 4.29 1.46 +/- 4.97 1.34 +/- 4.58 Ba-140 -5.22 +/- 22.0 3.12 +/- 15.0 -10.40 +/- 20.5 La-140 -1.49 +/- 4.77 -2.45 +/- 4.80 -1.68 +/- 7.06 1-131 -0.15 +/- 0.29 0.13 +/- 0.30 0.03 +/- 0.26 K-40 1150 +/- 161 1130 +/- 159 1550 +/- 186 Sr-89 2.52 +/- 2.66 Sr-90 0.54 +/- 0.43 A JULY Cs-134 1.03 +/- 2.78 -1.00 +/- 3.47 -2.72 +/- 3.32 Cs-137 0.15 +/- 2.98 2.85 +/- 2.91 -0.01 +/- 2.96 Ba-140 1.78 +/- 14.6 -1.62 +/- 15.0 -5.91 +/- 15.0 I La-140 2.70 +/- 4.66 0.28 +/- 4.94 -0.44 +/- 4.11 1-131 0.04 +/- 0.55 0.24 +/- 0.44 -0.04 +/- 0.33 K-40 1420 +/- 136 1280 +/- 119 1550 +/- 120 AUGUST Cs-134 3.42 +/- 4.86 2.18 +/- 4.14 0.11 +/- 5.64 Cs-137 -1.44 +/- 4.19 1.67 +/- 4.04 2.82 +/- 6.01 Ba-140 -4.50 +/- 16.7 23.0 +/- 17.2 A -17.2 +/- 20.4 La-140 2.90 +/- 5.90 -1.52 +/- 4.60 -1.24 +/- 8.49 1-131 0.02 +/- 0.31 0.27 +/- 0.40 0.06 +/- 0.34 K-40 1330 +/- 152 1360 +/- 149 1890 +/- 237 A: <MDC L -'

I I :

i .

36

TABLE 3-6: GAMMA EMITTER AND STRONTIUM CONCENTRATIONS IN MILK Surry Power Station, Surry County, Virginia - 2018 pCi/Liter +/- 2 Sigma Page 3 of3 COLONIAL LOVERS RETREAT/

NUCLIDE EPPS PARKWAY BEACHY FARM-C

\-- SEPTEMBER Cs-134 -1.67 +/- 4.29 4.32 +/- 5.50 2.28 +/- 5.50 Cs-137 -0.36 +/- 4.86 3.33 +/- 5.46 -1.81 +/- 4.72 Ba-140 -3.98 +/- 20.8 18.3 +/- 25.2 -11.3 +/- 24.5 La-140 2.24 +/- 5.04 -1.24 +/- 5.98 2.22 +/- 7.48 1-131 0.02 +/- 0.37 0.27 +/- 0.53 -0.33 +/- 0.42 K-40 1410 +/- 159 1210 +/- 200 1720 +/- 200 Sr-89 3.67 +/- 2.96A Sr-90 1.24 +/- 0.67 OCTOBER Cs-134 1.22 +/- 4.09 -1.06 +/- 3.61 -0.93 +/- 5.43 I

l I Cs-137 3.95 +/- 3.59A 0.76 +/- 4.63 -2.83 +/- 4.72 Ba-140 -6.30 +/- 16.9 3.13 +/- 19.3 -20.9 +/- 21.8 La-140 -2.26 +/- 4.78 -4.36 +/- 5.53 -5.08 +/- 6.13 1-131 0.34 +/- 0.29A -0.04 +/- 0.41 0.15 +/- 0.38 K-40 1500 +/- 142 1200 +/- 162 1690 +/- 174 NOVEMBER Cs-134 -0.77 +/- 3.87 0.53 +/- 5.12 1.82 +/- 3.81 Cs-137 2.84 +/- 3.47 -0.75 +/- 5.28 0.78 +/- 4.11 Ba-140 -10.8 +/- 17.7 6.67 +/- 22.1 5.58 +/- 15.1 La-140 -2.24 +/- 4.82 -3.06 +/- 5.11 -1.98 +/- 5.15 1-131 -0.05 +/- 0.33 -0.07 +/- 0.23 -0.09 +/- 0.50 K-40 1390 +/- 130 1180 +/- 194 1090 +/- 156 lI ___

DECEMBER Cs-134 -1.13 +/- 4.98 2.92 +/- 5.17 -3.07 +/- 3.96 Cs-137 0.46 +/- 4.86 -3.27 +/- 4.62 -1.60 +/- 4.02 Ba-140 1.69 +/- 22.3 23.0 +/- 20.8A 9.30 +/- 17.1 La-140 -2.33 +/- 7.50 -1.02 +/- 4.84 -1.44 +/- 3.86 1-131 0.01 +/- 0.26 0.14 +/- 0.35 -0.01 +/- 0.24 K-40 1330 +/- 191 1160 +/- 158 1230 +/- 158 Sr-89 3.02 +/- 1.99 A Sr-90 1.48 +/- 0.70 A: <MDC

/

I I-I I I_'

37

I TABLE 3-7: GAMMA EMITTER CONCENTRATION IN FOOD PRODUCTS Surry Power Station, Surry County, Virginia - 2018 pCi/kg (wet)+/- 2 Sigma Page 1 of 1 SAMPLING COLLECTION SAMPLE ISOTOPE LOCATIONS DATE TYPE Cs-134 Cs-137 1-131 K-40 BROCK 11/12/2018 Peanuts 7.83 +/- 17.8 8.74 +/- 19.6 1.63 +/- 30.6 6110 +/- 729 FARM Cs-134 Cs-137 1-131 K-40 11/12/2018 Corn -9.29 +/- 13.9 5.79 +/- 15.0 15.1 +/- 23.3 4450 +/- 636 Cs-134 Cs-137 1-131 K-40 SLADE 12/11/2018 Soybeans 1.92 +/- 14.8 8.63 +/- 12.2 -2.10 +/- 16.6 18300 +/- 792 FARM 38

I i \

TABLE 3-8: GAMMA EMITTER AND TRITIUM CONCENTRATIONS IN WELL WATER

! : Suny Power Station, Suny County, Virginia - 2018 pCi/Liter +/- 2 Sigma Page I of2

-- SAMPLING COLLECTION LOCATIONS DATE ISOTOPE Mn-54 Co-58 Fe-59 Co-60 Zn-65 r--, 55 3/6/2018 1.41 +/- 3.45 -1.13 +/- 3.06 8.49 +/- 5.96A -2.67 +/- 3.26 0.35 +/- 7.78 6/4/2018 -3.50 +/- 3.18 -0.78 +/- 3.01 1.14 +/- 6.52 -2.58 +/- 3.35 -3.73 +/- 6.77 9/4/2018 -0.26 +/- 3.52 -3.70 +/- 3.47 2.03 +/- 7.11 0.64 +/- 3.70 -0.07 +/- 8.38 12/11/2018 -2.54 +/- 3.64 1.89 +/- 3.63 0.20 +/- 7.44 5.20 +/- 4.15 -0.63 +/- 7.82 Nb-95 Zr-95 1-131 Cs-134 Cs-137 3/6/2018 -0.53 +/- 3.22 -0.50 +/- 5.54 0.01 +/- 0.27 -0.39 +/- 3.55 -0.03 +/- 3.63 6/4/2018 -1.82 +/- 3.29 -0.41 +/- 6.06 -0.39 +/- 0.33 -1.93 +/- 3.48 3.45 +/- 3.36A 9/4/2018 0.32 +/- 3.27 -4.19 +/- 6.72 -0.26 +/- 0.50 -1.73 +/- 4.67 0.35 +/- 3.67 12/11/2018 0.29 +/- 3.02 -2.91 +/- 4.94 -0.14 +/- 0.46 -0.02 +/- 4.18 -0.90 +/- 3.47 Ba-140 La-140 H-3 3/6/2018 -3.59 +/- 9.95 -0.25 +/- 4.58 -5.33 +/- 609 6/4/2018 9.76 +/- 15.7 -2.72 +/- 4.37 -398 +/- 633 9/4/2018 19.6 +/- 19.6 -1.10 +/- 6.88 -133 +/- 697 12/11/2018 13.8 +/- 18.3 1.68 +/- 5.08 -179 +/- 456 Mn-54 Co-58 Fe-59 Co-60 Zn-65 HIR 3/6/2018 -0.76 +/- 3.30 -1.41 +/- 4.12 -4.67 +/- 6.91 -1.41 +/- 3.05 -5.07 +/- 8.07 6/4/2018 -0.56 +/- 3.48 0.95 +/- 3.60 4.80 +/- 6.69 -0.003 +/- 3.53 -4.48 +/- 7.89 9/4/2018 0.04 +/- 2.96 -1.24 +/- 3.07 2.44 +/- 6.27 1.09 +/- 3.05 3.69 +/- 6.39 12/11/2018 -2.34 +/- 3.20 -1.08 +/- 3.12 2.67 +/- 6.67 3.40 +/- 4.11 -1.69 +/- 9.57 Nb-95 Zr-95 1-131 Cs-134 Cs-137 3/6/2018 -0.84 +/- 4.11 2.63 +/- 6.68 -0.08 +/- 0.22 2.73 +/- 3.80 -4.71 +/- 4.88 6/4/2018 1.08 +/- 3.36 4.34 +/- 5.46 -0.18 +/- 0.40 0.38 +/- 3.63 -0.68 +/- 3.59 9/4/2018 4.30 +/- 3.12A 3.11 +/- 5.15 0.01 +/- 0.23 0.76 +/- 3.16 -1.45 +/- 2.85 L - 12/11/2018 0.83 +/- 4.12 -1.23 +/- 4.57 0.20 +/- 0.49 5.27 +/- 3.82A 0.19 +/- 3.49 Ba-140 La-140 H-3 3/6/2018 -5.86 +/- 17.4 -2.32 +/- 5.84 518 +/- 640 6/4/2018 2.65 +/- 17.9 -1.23 +/- 6.62 242 +/- 654 9/4/2018 2.33 +/- 15.0 -3.18 +/- 4.77 499 +/- 716 12/11/2018 12.5 +/- 15.5 3.36 +/- 5.33 -103 +/- 473 A: < MDC Value I

i I I

39

TABLE 3-8: GAMMA EMITTER AND TRITIUM CONCENTRATIONS IN WELL WATER

,--1 Surry Power Station, Surry County, Virginia - 2018 pCi/Liter +/- 2 Sigma Page 2 of2 SAMPLING COLLECTION LOCATIONS DATE ISOTOPE Mn-54 Co-58 Fe-59 Co-60 Zn-65 TC 3/6/2018 0.33 +/- 3.39 -2.56 +/- 3.74 -0.46 +/- 7.50 1.31 +/- 3.99 1.77 +/- 10.1 6/4/2018 -1.88 +/- 2.67 0.63 +/- 2.95 4.27 +/- 5.09 2.94 +/- 2.30A 6.37 +/- 6.01 A 9/3/2018 3.17 +/- 2.98 1.45 +/- 2.95 6.97 +/- 6.54A 1.34 +/- 3.15 -0.53 +/- 7.55 12/11/2018 -1.56 +/- 3.27 -0.47 +/- 3.63 0.45 +/- 8.08 2.47 +/- 4.39 -3.14 +/- 7.42 Nb-95 Zr-95 1-131 Cs-134 Cs-137 3/6/2018 . 5.78 +/- 4.31 A 1.63 +/- 6.80 -0.34 +/- 0.26 0.26 +/- 4.20 -5.99 +/- 4.20 6/4/2018 7.58 +/- 3.54 B 2.95 +/- 5.03 0.09 +/- 0.30 0.73 +/- 2.88 -1.46 +/- 2.97 9/3/2018 -0.12 +/- 3.41 -1.78 +/- 6.11 -0.29 +/- 0.39 -1.69 +/- 3.10 1.32 +/- 3.08 12/11/2018 1.03 +/- 3.75 1.96 +/- 6.13 -0.29 +/- 0.44 -2.30 +/- 3.84 1.19 +/- 3.98 Ba-140 La-140 H-3 3/6/2018 -7.89 +/- 14.7 -3.74 +/- 5.17 238 +/- 617 6/4/2018 0.04 +/- 14.2 5.39 +/- 4.58A -85.8 +/- 646 9/3/2018 3.11 +/- 13.7 -5.62 +/- 4.75 583 +/- 733 12/11/2018 -0.61 +/- 16.5 -0.73 +/- 5.91 -108 +/- 471 A: < MDC Value

,* I I I L. _I 40

TABLE 3-9: GAMMA EMITTER AND TRITIUM CONCENTRATIONS IN RIVER WATER Surry Power Station, Surry County, Virginia - 2018 I

I pCi/Liter +/- 2 Sigma IPage 1 of2 SAMPLING COLLECTION LOCATIONS DATE ISOTOPE Mn-54 Co-58 Fe-59 Co-60 Zn-65 SD 1/2/2018 -0.90 +/- 3.51 -2.57 +/- 2.95 -1.88 +/- 6.46 -2.28 +/- 3.68 -9.72 +/- 10.4 2/5/2018 0.64 +/- 4.98 1.24 +/- 5.39 0.88 +/- 10.5 0.93 +/- 4.54 10.3 +/- 10.1 3/6/2018 0.38 +/- 4.11 1.25 +/- 4.25 -5.00 +/- 8.31 2.42 +/- 4.01 -7.46 +/- 9.39 4/10/2018 0.16 +/- 2.92 -0.26 +/- 2.54 0.89 +/- 7.47 1.30 +/- 3.35 -1.73 +/- 7.87 5/1/2018 2.71 +/- 2.48 -0.10 +/- 2.80 -1.20 +/- 4.73 -0.56 +/- 2.75 -3.58 +/- 5.56 6/4/2018 -0.27 +/- 3.17 0.46 +/- 2.89 6.61 +/- 7.44 -0.60 +/- 4.14 -7.44 +/- 8.32 7/9/2018 -0.71 +/- 2.14 -2.27 *+/- 2.37 -4.18 +/- 4.91 -0.26 +/- 2.43 -2.53 +/- 5.31 8/6/2018 -1.46 +/- 3.29 -1.77 +/- 3.36 1.79 +/- 6.80 -0.60 +/- 3.34 -10.3 +/- 8.56 9/3/2018 -1.19 +/- 3.41 -0.81 +/- 3.30 5.46 +/- 7.78 1.61 +/- 3.62 2.04 +/- 8.37 10/9/2018 0.76 +/- 2.58 -0.41 +/- 2.52 6.85 +/- 5.27 1.36 +/- 2.21 -6.22 +/- 5.97 11/19/2018 -1.43 +/- 3.22 -1.24 +/- 2.90 2.63 +/- 6.63 1.61 +/- 3.07 -4.28 +/- 6.77 12/11/2018 0.87 +/- 3.94 -1.43 +/- 4.06 -2.18 +/- 8.58 3.16 +/- 3.39 -2.84 +/- 8.83 Nb-95 Zr-95 1-131 Cs-134 Cs-137 1/2/2018 -2.43 +/- 4.15 1.16 +/- 4.60 -3.58 +/- 3.72 -2.86 +/- 3.46 0.78 +/- 3.72 2/5/2018 1.21 +/- 4.64 -11.2 +/- 7.73 -0.70 +/- 5.37 1.04 +/- 5.12 -1.05 +/- 4.92 3/6/2018 -1.58 +/- 3.13 0.27 +/- 5.71 -0.95 +/- 4.53 4.70 +/- 5.00 2.00 +/- 3.99 4/10/2018 -2.78 +/- 3.28 0.64 +/- 4.53 -1.36 +/- 3.08 -3.17 +/- 3.58 -1.41 +/- 2.56 5/1/2018 0.46 +/- 2.54 3.65 +/- 4.60 -1.33 +/- 5.41 0.36 +/- 3.02 0.41 +/- 3.16 6/4/2018 -0.24 +/- 3.98 -2.73 +/- 6.09 -3.31 +/- 5.15 -2.14 +/- 3.66 2.06 +/- 3.35 7/9/2018 0.59 +/- 2.59 0.67 +/- 4.45 0.37 +/- 5.48 -0.36 +/- 2.90 1.60 +/- 2.50 8/6/2018 0.88 +/- 3.02 5.60 +/- 5.86 -2.62 +/- 5.85 -1.73 +/- 3.36 1.40 +/- 3.34 9/3/2018 0.90 +/- 3.91 -2.46 +/- 6.24 -0.94 +/- 5.82 2.10 +/- 3.78 -4.34 +/- 3.72 10/9/2018 0.65 +/- 2.74 2.51 +/- 4.75 3.03 +/- !:i.01 -1.82 +/- 3.11 -0.66 +/- 2.63 11/19/2018 3.16 +/- 3.23 -0.90 +/- 5.72 -5.63 +/- 5.76 -2.09 +/- 3.28 0.58 +/- 3.22 12/11/2018 -4.21 +/- 3.81 -3.14 +/- 6.01 3.32 +/- 4.72 -0.74 +/- 3.74 0.71 +/- 3.59 Ba-140 La-140 H-3 K-40 Th-228 1/2/2018 0.27 +/- 10.9 -1.94 +/- 4.40 115.0 +/- 79.6 2/5/2018 -7.45 +/- 19.1 -1.03 +/- 6.38 3/6/2018 -1.58 +/- 13.7 -2.13 +/- 5.69 159 +/- 125A 4/10/2018 -0.26 +/- 12.6 -1.77 +/- 4.79 5/1/2018 -3.63 +/- 14.5 1.24 +/- 4.09 6/4/2018 6.19 +/- 15.3 -0.24 +/- 5.81 542 +/- 593 I ' 7/9/2018 3.35 +/- 13.7 -3.00 +/- 3.69 8/6/2018 -14.7 +/- 16.6 3.76 +/- 5.96 9/3/2018 -1.18 +/- 17.4 0.89 +/- 5.86 118 +/- 664 62.8 +/- 45.1 20.9 +/- 14.7 10/9/2018 -0.61 +/- 12.7 -0.48 +/- 4.13 11/19/2018 -10.2 +/- 16.1 1.56 +/- 5.44 12/11/2018 -6.13 +/- 19.0 -5.73 +/- 8.07 95.0 +/- 598 A:< MDC I

I I

I 41

TABLE 3-9: GAMMA EMITTER AND TRITIUM CONCENTRATIONS IN RIVER WATER Surry Power Station, Surry County, Virginia - 2018 pCi/Liter +/- 2 Sigma Page 2 of2 SAMPLING COLLECTION LOCATIONS DATE ISOTOPES Mn-54 Co-58 Fe-59 Co-60 Zn-65 SW-C 1/2/2018 3.10 +/- 3.51 0.31 +/- 3.66 -0.85 +/- 7.26 1.45 +/- 4.31 -0.65 +/- 8.13 2/5/2018 0.92 +/- 4.35 0.11 +/- 3.78 2.94 +/- 6.35 3.58 +/- 3.94 -13.0 +/- 8.77 3/6/2018 1.91 +/- 3.97 -2.72 +/- 3.16 -0.36 +/- 6.40 0.84 +/- 3.80 -12.6 +/- 10.5 4/10/2018 -1.25 +/- 2.66 1.80 +/- 2.51 3.38 +/- 6.10 1.44 +/- 3.25 -1.71 +/- 7.15 5/1/2018 0.93 +/- 1.64 0.45 +/- 1.81 1.32 +/- 3.46 1.46 +/- 1.88 3.69 +/- 3.70 6/4/2018 -0.19 +/- 2.74 2.17 +/- 2.88 -0.54 +/- 5.52 0.63 +/- 3.43 -2.37 +/- 6.70 7/10/2018 -0.18 +/- 2.12 0.84 +/- 2.44 1.42 +/- 5.55 1.43 +/- 2.54 -3.80 +/- 5.50 8/6/2018 -3.21 +/- 3.36 -1.81 +/- 2.96 7.42 +/- 6.95A 0.44 +/- 3.41 4.03 +/- 6.68 9/4/2018 -0.43 +/- 2.94 2.48 +/- 2.78 -3.44 +/- 6.21 0.78 +/- 3.06 -4.51 +/- 7.26 10/9/2018 -1.34 +/- 2.84 -1.49 +/- 2.87 -0.15 +/- 6.25 -1.09 +/- 3.05 -7.46 +/- 7.32 11/20/2018 0.46 +/- 2.97 -1.90 +/- 3.16 -0.77 +/- 6.53 0.59 +/- 3.23 -0.24 +/- 5.44 12/11/2018 -2.25 +/- 3.18 1.04 +/- 3.81 -4.57 +/- 5.86 1.93 +/- 2.99 -7.94 +/- 7.78 Nb-95 Zr-95 1-131 Cs-134 Cs-137 1/2/2018 -0.15 +/- 3.38 1.25 +/- 5.98 1.62 +/- 3.99 3.82 +/- 4.41 -3.27 +/- 4.09 2/5/2018 -1.18 +/- 4.22 4.26 +/- 6.94 0.47 +/- 5.46 -0.68 +/- 4.55 -0.67 +/- 3.43 3/6/2018 0.41 +/- 3.57 -3.90 +/- 5.78 -1.55 +/- 5.21 3.67 +/- 4.48 0.91 +/- 3.48 4/10/2018 0.12 +/- 2.78 3.30 +/- 4.80 -1.49 +/- 2.68 1.53 +/- 3.09 -1.30 +/- 2.58 5/1/2018 1.05 +/- 2.10 -1.44 +/- 3.41 0.49 +/- 3.67 -0.70 +/- 1.78 -0.06 +/- 1.97 6/4/2018 0.77 +/- 2.94 4.04 +/- 5.21 -5.10 +/- 5.93 0.45 +/- 3.15 -0.55 +/- 3.28 7/10/2018 1.29 +/- 2.35 -0.07 +/- 3.98 2.77 +/- 4.58 1.87 +/- 2.67 -0.23 +/- 2.52 8/6/2018 -0.31 +/- 4.14 0.42 +/- 6.28 -2.88 +/- 5.98 1.90 +/- 3.51 0.88 +/- 3.61 9/4/2018 -0.53 +/- 3.17 5.79 +/- 4.87 A 2.32 +/- 5.54 0.91 +/- 3.25 -0.23 +/- 3.03 10/9/2018 1.13 +/- 2.97 -0.44 +/- 4.54 7.66 +/- 5.03A 2.44 +/- 3.28 -1.89 +/- 3.27 11/20/2018 0.89 +/- 3.16 -0.47 +/- 5.30 -2.37 +/- 5.15 -1.71 +/- 3.20 0.47 +/- 3.18 12/11/2018 -1.62 +/- 3.40 1.65 +/- 4.90 -0.21 +/- 4.96 -0.06 +/- 2.63 -1.04 +/- 3.36

/ I Ba-140 La-140 H-3 K-40 1/2/2018 0.22 +/- 13.6 -0.81 +/- 3.88 2/5/2018 10.7 +/- 16.9 -0.19 +/- 5.83 127 +/- 87.9 3/6/2018 -3.20 +/- 15.7 -3.18 +/- 4.83 73.9 +/- 120 4/10/2018 -0.01 +/- 8.66 1.55 +/- 3.34 5/1/2018 5.81 +/- 9.70 -0.07 +/- 2.84 6/4/2018 -0.57 +/- 16.5 0.06 +/- 3.83 147 +/- 554 7/10/2018 4.57 +/- 12.5 0.48 +/- 4.19 8/6/2018 -4.03 +/- 15.5 2.19 +/- 6.20 9/4/2018 -3.32 +/- 16.2 0.63 +/- 5.10 470 +/- 695 10/9/2018 -2.46 +/- 13.8 -0.99 +/- 5.06 11/20/2018 -0.07 +/- 15.6 -2.44 +/-

12/11/2018 -14.5 +/- 15.7 -1.01 +/- 5.41 -59.6 +/- 597 A:< MDC

' i I ___ .J I__

42

TABLE 3-10: GAMMA EMITTER CONCENTRATIONS IN SILT Surry Power Station, Surry County, Virginia - 2018 pCi/kg (dry)+/- 2 Sigma Page 1 of 1 SAMPLING COLLECTION LOCATIONS DATE ISOTOPE Cs-134 Cs-137 K-40 Th-228 Th-232 SD 3/19/2018 96.2 +/- 72.4A 281 +/- 131 17700 +/- 2390 1670 +/- 187 1070 +/- 281 9/4/2018 325.0 +/- 65.8 B 90.5 +/- 47.4 A 12200 +/- 1740 863 +/- 101 774 +/- 219 Ra-226 Be-7 3/19/2018 3380 +/- 2220 9/4/2018 3230 +/- 1520 1030 +/- 747 Cs-134 Cs-137 K-40 Th-228 Th-232 CHIC-C 3/19/2018 62.3 +/- 76.4 114 +/- 72.3A 19500 +/- 2230 1690 +/- 152 1500 +/- 265 9/5/2018 -1.65 +/- 59.9 115 +/- 65.0 A 16700 +/- 2380 1510 +/- 219 1310 +/- 282 Ra-226 Be-7 3/19/2018 3760 +/- 2180 9/5/2018 2440 +/- 2230 610 +/- 482A Cs-134 Cs-137 K-40 Th-228 Th-232 SI 5/3/2018 154 +/- 113 B 51.8 +/- 78.7 16600 +/- 2460 1440 +/- 183 9/4/2018 65.4 +/- 71.7 222 +/- 112 17400 +/- 2280 1480 +/- 181 1330 +/- 355 Ra-226 Be-7 Ac-228 5/3/2018 2120 +/- 916 1280 +/- 596 9/4/2018 3970 +/- 2070 3270 +/- 1370 A:< MDC B: The analyte was not detected. Peak not identified, but forced activity concentration exceeds MDC and 2 sigma.

43

I i I TABLE 3-11: GAMMA EMITTER CONCENTRATIONS IN SHORELINE SEDIMENT I

Surry Power Station, Surry County, Virginia - 2018 I

I I pCi/kg (dry)+/- 2 Sigma Page 1 of 1 SAMPLING COLLECTION LOCATIONS DATE ISOTOPE Cs-134 Cs-137 K-40 Ra-226 Th-228 HIR 2/5/2018 32.7 +/- 30.9 A -11.3 +/- 28.8 7520 +/- 1010 +/- 134 +/- 74.0 8/6/2018 8.23 +/- 29.4 -0.60 +/- 23.5 9750 +/- 1170 +/- 240 +/- 74.9 Th-232 Ac-228

+/- +/-

I I

+/- 156 +/- 142 Cs-134 Cs-137 - K-40 Ra-226 Th-228 CHIC-C 2/5/2018 58.8 +/- 51.9 A 29.1 +/- 36.2 3880 +/- 995 1450 +/- 1160 994 +/- 127 8/6/2018 20.2 +/- 30.8 49.8 +/- 31.4A 1200 +/- 540 Th-232

__: 1260 +/- 171 A: <MDC I I I I I I Il_ - !

I I

/

L i' I 44

I i :

' I

' TABLE 3-12: GAMMA EMITTER CONCENTRATION IN FISH Surry Power Station, Surry County, Virginia - 2018 pCi/kg (wet)+/- 2 Sigma Page 1 of 1 SAMPLING COLLECTION SAMPLE I

LOCATION DATE TYPE ISOTOPE i

K-40 Mn-54 Co-58 Fe-59 SD 4/3/2018 Catfish 2320 +/- 706 2.73 +/- 21.5 3.07 +/- 30.6 11.7 +/- 61.9 Game fish 2220 +/- 523 -5.84 +/- 20.0 21.1 +/- 23.4 -10.6 +/- 50.6 10/9/2018 Catfish 1240 +/- 661 -9.06 +/- 41.8 4.93 +/- 56.0 -5.86 +/- 116

-- +/-_ 1060 11.6 +/- 51.4 +/- 135 Game fish 1710 51.2 +/- 55.8 64.6 Co-60 Zn-65 Cs-134 Cs-137 4/3/2018 Catfish -15.3 +/- 24.7 -27.4 +/- 54.3 -6.43 +/- 25.7 28.0 +/- 25.3A I i Game fish 12.7 +/- 22.6 -46.4 +/- 43.4 -3.06 +/- 22.2 -5.95 +/- 19.8 10/9/2018 Catfish 18.2 +/- 32.6 -40.3 +/- 112 -5.12 +/- 44.3 -9.05 +/- 36.9 Game fish -11.0 +/- 48.2 15.3 +/- 104 2.34 +/- 52.0 23.0 +/- 44.7 A:< MDC I

I I I

I I

45

TABLE 3-13: GAMMA EMITTER CONCENTRATIONS IN OYSTERS Surry Power Station, Surry County, Virginia - 2018 pCi/kg (wet) +/- 2 Sigma Page 1 of 1 I i SAMPLING COLLECTION i ! LOCATIONS DATE ISOTOPE Mn-54 Co-58 Fe-59 Co-60 POS 3/28/2018 -5.85 +/- 18.9 -2.76 +/- 24.6 -18.2 +/- 59.1 -12.4 +/- 20.2 9/12/2018 3.32 +/- 40.3 -2.95 +/- 39.7 17.4 +/- 74.6 9.46 +/- 41.0 Zn-65 Cs-134 Cs-137 K-40 3/28/2018 -25.8 +/- 49.2 2.89 +/- 23.2 4.83 +/- 21.2 527 +/- 453 9/12/2018 -81.4 +/- 84.7 6.12 +/- 39.4 5.81 +/- 40.1 Mn-54 Co-58 Fe-59 Co-60 MP 3/15/2018 7.34 +/- 30.0 -32.1 +/- 37.3 -9.74 +/- 97.9 26.9 +/- 31.4 9/12/2018 -2.64 +/- 23.6 3.88 +/- 25.8 -21.0 +/- 59.7 -15.0 +/- 26.3 Zn-65 Cs-134 Cs-137 K-40 3/15/2018 27.4 +/- 67.4 4.03 +/- 34.1 17.3 +/- 28.9 9/12/2018 -22.8 +/- 55.9 8.13 +/- 25.6 8.99 +/- 27.5 736 +/- 512 I I Mn-54 Co-58 Fe-59 Co-60 SHI 3/28/2018 -11.6 +/- 23.5 2.93 +/- 25.7 -2.42 +/- 52.9 -6.28 +/- 21.5 9/5/2018 0.76 +/- 30.3 25.5 +/- 38.1 -19.0 +/- 73.0 22.8 +/- 35.9 Zn-65 Cs-134 Cs-137 K-40 3/28/2018 -49.4 +/- 48.2 14.7 +/- 24.5 -12.3 +/- 23.6 716 +/- 461 9/5/2018 -51.9 +/- 88.9 -16.3 +/- 36.9 -8.47 +/- 32.0 I I I !

i

[_i I .

I 46

TABLE 3-14: GAMMA EMITTER CONCENTRATIONS IN CLAMS Surry Power Station, Surry County, Virginia - 2018 pCi/kg (wet) +/- 2 Sigma Page 1 of 1 I SAMPLING COLLECTION i !

LOCATIONS DATE ISOTOPE Mn-54 Co-58 Fe-59 Co-60 JI 3/23/2018 -18.0 +/- 26.5 11.2 +/- 29.9 5.70 +/- 75.6 -14.3 +/- 22.1 9/5/2018 -10.8 +/- 48.6 -14.8 +/- 51.4 37.5 +/- 97.5 27.6 +/- 36.8 Zn-65 Cs-134 Cs-137 3/23/2018 -22.5 +/- 54.3 22.1 +/- 26.8 -11.1 +/- 28.8 9/5/2018 -84.1 +/- 10.2 16.8 +/- 43.1 9.84 +/- 49.6 Mn-54 Co-58 Fe-59 Co-60 SD 3/19/2018 15.4 +/- 37.3 10.2 +/- 45.2 27.8 +/- 91.0 47.2 +/- 33.1 A 9/4/2018 2.20 +/- 26.9 7.71 +/- 28.1 -0.07 +/- 47.7 -3.20 +/-* 23.0 Zn-65 Cs-134 Cs-137 3/19/2018 -49.9 +/- 74.2 31.1 +/- 36.1 1.86 +/- 32.5 9/4/2018 -29.3 +/- 56.3 3.45 +/- 23.6 20.0 +/- 22.6 Mn-54 Co-58 Fe-59 Co-60 CHIC-C 3/19/2018 -2.80 +/- 23.0 -11.3 +/- 27.1 -40.4 +/- 66.8 23.3 +/- 23.1 A 9/5/2018 2.13 +/- 19.7 6.09 +/- 18.2 -13.5 +/- 44.0 2.36 +/- 14.8 Zn-65 Cs-134 Cs-137 3/19/2018 -36.5 +/- 47.1 6.81 +/- 20.8 -2.13 +/- 21.2 9/5/2018 20.4 +/- 40.2 -7.63 +/- 16.1 -0.04 +/- 14.0 A:< MDC 47

TABLE 3-15: GAMMA EMITTER CONCENTRATIONS IN CRABS Surry Power Station, Surry County, Virginia - 2018 pCi/kg (wet) +/- 2 Sigma Page 1 of 1 SAMPLING COLLECTION LOCATIONS DATE ISOTOPE K-40 Mn-54 Co-58 Fe-59 SD 6/26/2018 1400 +/- 585 -3.32 +/- 22.9 10.4 +/- 26.1 80.2 +/- 52.5 A Co-60 Zn-65 Cs-134 Cs-137 6/26/2018 -4.48 +/- 30.2 -17.2 +/- 61.0 -8.79 +/- 26.9 -13.5 +/- 27.6 A: <MDC I

48

4. DISCUSSION OF RESULTS Data from the radiological analyses of environmental media collected during 2018 and tabulated in Section 3, are discussed below. The procedures and specifications followed in the laboratory for these analyses are as required in the I I Teledyne Brown Engineering quality assurance manuals and laboratory procedures. In addition to internal quality control measures performed by the laboratories, they also participate in an Interlaboratory Comparison Program.

Participation in this program ensures that independent checks on the precision and accuracy of the measurements of radioactive material in environmental samples are performed. The results of the Interlaboratory Comparison Program are provided in Appendix B.

The predominant radioactivity detected throughout 2018 was from external sources, such as fallout from nuclear weapons tests (cesium-137) and naturally occurring radionuclides. Naturally occurring nuclides such as beryllium-7, radium-226, thorium-228, thorium-232 and potassium-40 were detected in numerous samples.

The foUoWirrg--is- a -discussion-and --summary-ef -the--Fesults of--the -environmental measurements taken during the 2018 reporting period.

4.1 Gamma Exposure Rate 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 for environmental monitoring. Three TLDs are deployed at I

each sampling location. TLDs are placed in two concentric rings around the I

_J I

station. The inner ring is located in the vicinity of the site 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 radioisotopes in the air and soil, radiation from cosmic origin,

, I fallout from nuclear weapons testing, station effluents and direct radiation from I the station.

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 2018. The results of the TLD analyses shown in Table 3-2 comply with Section 7 of ANSI/HPS Nl3.37-2014 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 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 I I I

49

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 baseline background dose for each monitoring location and determination of the smallest facility-related dose that can be detected above the baseline background.

4.2 Airborne Gross Beta 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 Table 3-3. A review of the results from control and indicator locations continues to show no significant variation in measured activities (see Figure 4-2 and 4-3). Data, as recorded in Figures 4-2 and 4-3, indicate that any contribution from station related activities is not measurable.

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 with the exception of the Chernobyl accident in 1986, airborne gross beta results have remained steady.

Figure 4-2:

2018 GROSS BETA IN AIR PARTICULATES 0.030 0.025 0.020 m

E

....... 0.015 ua.

0.010 0.005 0.000 r--- r--- 0 co r--- ..... <:t co .....

co .......

N I.D 0 CV) CV) <:t N LI) cr, CV) LI) cr, I.D 0 <:t

....... ..... ....... ..... ....... ..... ....... ..... ....... ....... ..... ....... ..... ..... N ............ CV)

..... ....... CV)

N

....... N

....... N N I.D .......

CV) r--- ....... ....... ....... ....... N 0

N

....... ..... N

--- N LI)

N N CV) CV) <:t

<:t LI) I.D r--- r--- co co cr, cr, 0

..... ..... N

~ Avg Indicator - Ave Control 50

Figure 4-3:

GROSS BETA IN AIR PARTICULATES HISTORICAL TREND l .OE-03 r-

°'00 s0 -

s:t <n <n

°' 0 0 0 N

0 M

0 0 0 '° 0 0 00 0 ...... ~ M

!: ~ ~ 00

°'

~ 0 N

0 N

0 N N N 0

N 0

N 0N 0 N

0 N

0N

~ Avg Indicator - Avg Control - Avg-Pre Op - Required LLD 4.3 Airborne Radioiodine Air is also continuously sampled for radioiodines by passing air through charcoal cartridges. Once a week, the charcoal cartridge samples are collected and analyzed. The results of the 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 2018.

4.4 Air Particulate Gamma 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 results indicate the presence of naturally occurring potassium-40 and beryllium-7, which are produced by cosmic processes. No man-made radionuclides were identified. These analyses confirm no effects from station effluents.

51

4.5 Animal Milk Analysis of milk samples is generally the most sensitive indicator of fission product existence in the terrestrial environment. This, in combination with the fact that the consumption of milk is significant, 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 station effluents.

Results of gamma spectroscopy indicate no detectable station related radioactivity was identified in milk samples in 2018. The results of the analyses are presented in Table 3-6. In years past, cesium-137 had been detected sporadically. The occurrences were attributed to residual global fallout from past atmospheric weapons testing.

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 samples are analyzed for strontium-89 and strontium-90.

No strontium-89 was detected in the four composites analyzed. Strontium-90 was detected in two of the four composite samples, with an average concentration of 1.36 pCi/L. Strontium-90 is not a component of the station radiological effluents and is a product of nuclear weapons testing fallout, which has been well documented.

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

4. 7 Well Water 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 and analyzes for gamma radiation and tritium. The results of these analyses are presented in Table 3-8. No station related radioactivity was detected. Historically, during the pre-operational period, no gamma emitting isotopes were detected.

52

4. 8 River Water Samples of the James River water are collected monthly and the results are presented in 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 was detected. Only naturally occurring potassium-40 and thorium-228 radionuclides were detected. No station related radioactivity was detected.

4.9 Silt 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 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.

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 added in third quarter of 201 7 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-7, potassium-40 ,

radium-226, thorium-228, thorium-232 and actinium-228 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 trend graph of cesium-137 and cobalt-60 concentrations is presented in Figures 4-4 and 4-5.

The trend graph, as displayed in Figure 4-5 , identifies an overall decreasing trend in concentration for cesium-137, as seen for three decades. The trended data is an average of the semi-annual sample analysis results. The average concentration in the control samples continues to indicate a decreasing trend. The average concentration in indicator sample, station discharge, indicates an overall decreasing trend; however, an increase in concentration was observed in 2018.

The location will continue to be carefully monitored. The station intake indicator sample was added to the REMP in 201 7. The additional sample location is 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 for the station intake is currently being established and carefully monitored.

53

The presence of cesium-137 is indicative of the accumulation, through runoff, of cesium-137 into the James River from residual weapons testing fallout. Its global presence has been well documented. Samples collected from the James River, during the pre-operational period, indicated the presence of cesium-137. The pre-operational average cesium-137 concentration is indicated in Figure 4-5.

The highest silt indicator location in 2018 is the station discharge, with an average cesium-137 concentration of 186 pCi/kg. This concentration is consistent with aquatic sediment samples collected in control locations of the James River.

Figure 4-4:

COBALT-60 IN SILT l.OE+04 ~ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ~

l.OE+Ol + - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ~

ote: Station Intake added to REMP, 3rd Qtr 2017 J.OE+OO N

r--

st r--

'-0 r--

00 r--

0 00 N

00 st 00

'-0 00 00 00 0

0\

N 0\

st 0\

'-0 0\

00 0\

0 0

N 0

st 0

'-0 0

00 0

0 N

'-0 00 0

0\ 0\ 0\ 0\

- 0\ 0\ 0\ ;:; 0\

0\ ;:; ;:; 0 N

0 N

0 N N 0 0 N

0 N

0 N N

- + - Control - Chickahominy LLD Avg --.- Station Discharge LLD Avg ~ Station Intake LLD Avg Chickahominy had detectable activity in 1982 and 1984 through 1994. Other years were <MDC, Minimum Detectable Concentration. Station Discharge was <MDC activity 1996 through 1998 and 2004 through 2018.

54

Figure 4-5:

CESIUM-137 IN SILT l.OE+03

~

-0 Cl

~

ua.

l.OE+02

-+- Control-Ch ickahominy ..,.._Station Discharge - station Intake - Ave- Pre Op - Required LLD 4.10 Shoreline Sediment Shoreline sediment, unlike river silt, may provide a direct dose to humans.

Buildup of radionuclides along the shoreline may provide a source of direct exposure for those using the area for commercial and recreational uses. The results are presented in Table 3-11.

The naturally occurring radionuclides potassium-40, radium-226, thorium-228, thorium-232 and actinium-228 were detected at concentrations equivalent to normal background activities. There were no radionuclides attributable to the operation of the station detected in any shoreline sediment samples.

4.11 Fish The radioactivity measured in fish sampled from the station discharge canal and analyzed by gamma spectroscopy is presented in Table 3-12. These results are similar to those seen over the last decade. No activity was observed in this media except for naturally occurring potassium-40.

55

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

4.13 Clams Clams are analyzed from three different locations. The results of the gamma spectroscopy analyses are presented in Table 3-14. There were no gamma emitting radionuclides detected in clams sampled.

4.14 Crabs An annual crab sample was collected from the station discharge canal and i

j I 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 effluents were detected in the sample.

I i . This is consistent with pre-operational data and data collected over the past decade.

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5. PROGRAM EXCEPTIONS i I There were three exceptions from the REMP sampling schedule in 2018.

The three exceptions are detailed below:

1. Milk samples were unavailable from the control location, Lover Retreat Dairy, during the months of January and February of 2018. The farmer provided advanced notification that the animals would be birthing during this period and the milk produced by them would be needed for nursing their young. Milk samples from all indicator locations were available and obtained in 2018. In accordance with the REMP, deviations are permitted from required sampling schedules if specimens are unobtainable due to seasonal unavailability.

2. The Suny Site (SS) environmental air sample patch was invalid for collection period 7/3/2018 - 7/10/2018. A visual inspection identified very little particulate material was deposited on the patch. Teledyne Brown Engineering (TBE) was notified, documented their observation and validated through analysis that the sample is invalid. TBE removed the sample from the quarterly composite group.

3. The Colonial Parkway (CP) milk sample from August 6, 2018 was used up during 1-131 low level analysis and not available for the quarterly composite.

The composite is composed of July and September samples only.

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1

6. CONCLUSIONS The results of the 2018 Radiological Environmental Monitoring Program for Suny Power Station have been presented in previous sections. This section presents conclusions for each pathway.

}.> Direct Radiation Exposure Pathway - There was no detectable external dose to members of the public from Suny Power Station in 2018.

i I }.> Airborne Exposure Pathway - Radioiodine analysis of charcoal cartridge samples indicated that no positive activity was detected. Quarterly gamma isotopic analyses of the composite particulate samples identified only naturally occurring beryllium-7 and potassium-40. 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 concluded the station contribution is not measurable.

}.> Milk - Milk samples are an important indicator measuring the effect of radioactive iodine and radionuclides in airborne releases. No positive cesium-137 or iodine-131 activity was detected in any of the thirty-four samples. Naturally occurring potassium-40 was detected at a similar level when compared to the averages of the previous years.

Strontium-90 was detected in two samples at an average concentration of 1.36 pCi/L. Strontium-90 is not a component of station effluents, but rather, a product of nuclear weapons testing fallout.

}.> Food Products - As expected, naturally occurring potassium-40 was detected in all three food product samples. In the past, 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 2018.

}.> Well Water - Well water sample analyses indicated there was no radioactivity attributable to the operation of the station. This trend is consistent throughout the monitoring period.

}.> River Water - River water samples were analyzed for gamma emitting radionuclides and tritium. Only naturally occurring potassium-40 was I detected. No positive tritium activity was detected.

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58

)"" Silt - No radioactivity attributable to the operation of the station was detected in the control location. Only naturally occurring radionuclides were present.

The indicator sample with the highest average concentration of cesium-137 during 2018 is the station discharge sample, with an average concentration of 186 pCi/kg. This concentration is consistent with aquatic sediment samples collected in control locations of the James River. The presence of cesium-137 is attributable to residual weapons testing fallout.

)"" Shoreline Sediment - There were no radionuclides attributable to the operation of Suny Power Station identified in any sample. Naturally occurring radionuclides were detected at concentrations equivalent to normal background activities.

Aquatic Biota

)"" Fish - As expected, naturally occurring potassium-40 was detected. There were no other positive gamma emitting radionuclides detected in any of the fish samples.

)"" Oysters - Other than naturally occurring potassium-40, there were no other positive gamma emitting radionuclides detected in any of the oyster samples.

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

)"" Crabs - Naturally occurring potassium-40 was detected. No other positive gamma emitting radionuclides were detected.

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REFERENCES 60

References

1. NUREG-04 72, "Radiological Effluent Technical Specifications for PWRs",

Draft Rev. 3, March 1982.

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

3. United States Nuclear Regulatory Commission, Regulatory Guide 4.8, "Environmental Technical Specifications fot Nuclear Power Plants",

December 1975.

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

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

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

7. HASL-300, Environmental Measurements Laboratory, "EML Procedures Manual," 27th Edition, Volume 1, February 1992.

8. NUREG/CR-4007, "Lower Limit of Detection: Definition and Elaboration

' of a Proposed Position for Radiological Effluent and Environmental I Measurements," September 1984.

9. NCRP Report No. 160, "Ionizing Radiation Exposure of the Population of c--

the United States," March 2009.

10. Position paper on "Implementation of ANSI/HPS Nl3.37-2014 Environmental Dosimetry Criteria at Surry Power Station", November 2016 byJohnM. Sukosky, CHP.

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APPENDICES 62

APPENDIX A: LAND USE CENSUS Year 2018 63

LAND USE CENSUS*

Surry Power Station, Surry County, Virginia January 1 to December 31, 201~ Page 1 of 1 Nearest Nearest Nearest Nearest Sector Direction Resident Garden** Cow Goat A N 4.1@ 10° (a) (a) (a)

B NNE 1.9 @32° (a) (a) (a)

C NE 4.7@35° (a) (a) (a)

D ENE (a) (a) (a) (a)

E E (a) (a) (a) (a)

F ESE (a) (a) (a) (a)

G SE 2.8@ 142° (a) (a) (a)

H SSE 2.7@ 158° 2.7@ 158° (a) (a)

J s 1.7@181° 2.0@ 183° (a) (a)

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

L SW 1.23 @216° 4.7@228° (a) (a)

M WSW 0.4 @244° 3.6@245° (a) (a)

N w 3.1 @260° 3.4@260° (a) (a) p WNW 4.9@283° (a) (a) (a)

Q NW 4.6@321° (a) (a) (a)

R NNW 3.8 @338° 4.4@334° 3.7@336° (a)

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

2

Area greater than 50 m and contains broadleafvegetation.

(a) None 64

APPENDIX B:

SUMMARY

OF INTERLABORATORY COMPARISONS Year 2018 65

INTRODUCTION.

The TBE Laboratory analyzed Performance Evaluation (PE) samples of air particulate, air iodine, milk, soil, vegetation, and water matrices for various analytes. The PE samples supplied by Analytics Inc., Environmental Resource Associates (ERA) and Department of Energy (DOE) Mixed Analyte Performance Evaluation Program (MAPEP), were evaluated against the following pre-set i acceptance criteria:

! i A. Analytics Evaluation Criteria i :

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 QC requirements based on the DOE MAPEP criteria.

B. ERA Evaluation Criteria 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 USEPA, National Environmental Laboratory Accreditation Conference (NELAC), state-specific Performance 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 regulatory document.

C. DOE Evaluation Criteria 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

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

of the reference value

Not Acceptable (flag = "N") - bias is greater than* 30% of the reference value Note: The Department of Energy (DOE) Mixed Analyte Peifonnance Evaluation Progrwn (MAPEP) sampies are created iu rnirnic conditions found at DOE sites which do not resemble typical environmental samples obtained at commercial nuclear powerfacilities.

I I 66

The results are reported to the provider for evaluation. The suite of QA/ QC samples is designed to provide sample media and radionuclide combinations that are offered by the providers and included in the REMP and typically includes:

--, };;>- milk for gamma nuclides and low-level iodine-131 analyses, I

};;>- milk for Sr-89 and Sr-90 analyses,

};;>- water for gamma nuclides, low-level iodine-131, and gross beta analyses,

};;>- water for tritium, Sr-89, and Sr-90 analyses,

};;>- cartridge for 1-131 analyses,

};;>- air filter for gamma nuclide, gross beta, and Sr-90 analyses.

RESULTS For the TBE laboratory, 164 out of 172 analyses performed met the specified acceptance criteria. Six analyses did not meet the specified acceptance criteria for the following reasons and were addressed through the TBE Corrective Action Program.

1. TBE was unable to report the February 2018 DOE MAPEP vegetation Sr-90 result due to QC failure and limited sample amount. (NCR 18-09)

2. The Analytics September 2018 milk Fe-59 result was evaluated as Not Acceptable (Ratio ofTBE to known result at 133%). The reported value was 158 +/- 17.6 pCi/L and the known value was 119 +/- 19.9 pCi/L. No cause for the failure could be determined. TBE has passed 24 of the previous 27 milk cross-check results since 2012. This sample was run in duplicate on a different detector with comparable results (162 +/- 16 pCi/L). NOTE: TBE's 4th Qtr result passed at 105% (NCR 18-20)

3. The Analytics September milk 1-131 result was evaluated as Not Acceptable (Ratio ofTBE to known result at 143%). Due to a personnel change in the gamma prep lab, the sample was not prepped/ counted in a timely manner such as to accommodate the 1-131 8-day half-life. Analysts have been made aware of the urgency for this analysis and it will be monitored more closely by QA. NOTE: TBE's 4th Qtr result passed at 101% (NCR 18-24) i I I 4. The Analytics September soil Cr-51 result was evaluated as Not Acceptable (Ratio ofTBE to known result at 131 %). As with #3 above, t...11.e sa..1nple *was not prepped/ counted in a timely manner such as to accommodate the Cr-51 27-day half-life. The same corrective action applies here as in #3. (NCR 18-21)

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67

5. The MAPEP November vegetation Sr-90 result of 0.338 Bq/sample was evaluated as Not Acceptable (Lower acceptable range was 0.554 Bq/sample).

It appears that there has been incomplete dissolution of Sr-90 due to the composition of the MAPEP vegetation "matrix". To resolve this issue, the TBE-2018 procedure has been modified to add H202 to assist in breaking down the organic material that comprises this "matrix". This corrective action will be monitored closely by QA. (NCR 18-25).

6. The ERA November 2018 water Sr-90 sample was evaluated as Not Acceptable. TBE's initial reported result of 36.8 pCi/L exceeded the upper acceptance range (22.9 - 36.4 pCi/L). After reviewing the data for this sample, it was discovered that there was a typographical error at the time the results were entered at the ERA website. The correct result in LIMS of 36.2 should have been submitted instead. This result is within ERA's acceptance limits. In addition to the typo error, ERA's very stringent upper acceptance limit of 116% is not a reflection ofTBE's ability to successfully perform this analysis. (NCR 18-23)

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

68

Analytics Environmental Radioactivity Cross Check Program Teledyne Brown Engineering Environmental Services Page 1 of 4 TBE Identification Known Ratio of TBE to Month/Year Matrix Nuclide Units Reported Evaluation (bl Number Value (al Analytics Result I I Value March 2018 E12133 Milk Sr-89 pCi/L 76.1 90.1 0.84 A Sr-90 pCi/L 12.2 12.5 0.98 A E12134 Milk Ce-141 pCi/L 77.8 77.0 1.01 A Co-58 pCi/L 105 114 0.92 A Co-60 pCi/L 181 187 0.97 A Cr-51 pCi/L 298 326 0.92 A Cs-134 pCi/L 150 180 0.84 A Cs-137 pCi/L 164 172 0.95 A Fe-59 pCi/L 140 139 1.01 A 1-131 pCi/L 105 108.0 0.97 A Mn-54 pCi/L 133 131 1.01 A Zn-65 pCi/L 242 244 0.99 A E12135 Charcoal 1-131 pCi 93.7 95.4 0.98 A E12136 AP Ce-141 pCi 92.6 85.3 1.09 A Co-58 pCi 130 126 1.03 A Co-60 pCi 237 207 1.14 A Cr-51 pCi 411 361 1.14 A Cs-134 pCi 194 199 0.98 A Cs-137 pCi 200 191 1.05 A Fe-59 pCi 160 154 1.04 A Mn-54 pCi 152 145 1.05 A Zn-65 pCi 267 271 0.99 A E12137 Water Fe-55 pCi/L 1990 1700 1.17 A E12138 Soil Ce-141 pCi/g 0.148 0.118 1.26 w Co-58 pCi/g 0.171 0.174 0.98 A Co-60 pCi/g 0.297 0.286 1.04 A Cr-51 pCi/g 0.537 0.498 1.08 A Cs-134 pCi/g 0.274 0.275 1.00 A Cs-137 pCi/g 0.355 0.337 1.05 A Fe-59 pCi/g 0.243 0.212 1.15 A Mn-54 pCi/g 0.228 0.201 1.14 A nc Zn-65 pCiig 0.395 0.374 A l,VU A (a) The Analytics known value is equal to 100% of the parameter present in the standard as determined by gravimetric and/or volumetric measurements made during standard preparation (b) Analytics evaluation based on TBE internal QC limits:

A= Acceptable - reported result falls within ratio limits of 0.80-1.20 W= Acceptable with warning- reported result falls within 0.70-0.80 or 1.20-1.30 N = Not Acceptable - reported result falls outside the ratio limits of< 0. 70 and > 1. 30 69

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Analytics Environmental Radioactivity Cross Check Program Teledyne Brown Engineering Environmental Services Page 2 of4 TSE Identification Known Ratio of TSE to Month/Year Matrix Nuclide Units Reported Evaluation (bl Number Value (a) Analytics Result Value June 2018 E12205 Milk Sr-89 pCi/L 74.9 *84.6 0.89 A Sr-90 pCi/L 10.5 11.4 0.92 A E12206 Milk Ce-141 pCi/L 89.2 82.2 1.08 A Co-58 pCi/L 94.8 89 1.07 *A Co-60 pCi/L 125 113 1.10 A Cr-51 pCi/L 256 239 1.07 A Cs-134 pCi/L 112 114 0.99 A Cs-137 pCi/L 107 98.8 1.08 A Fe-59 pCi/L 95.9 86.0 1.12 A 1-131 pCi/L 69.8 71.9 0.97 A Mn-54 pCi/L 138 130 1.06 A Zn-65 pCi/L 186 157 1.18 A E12207 Charcoal 1-131 pCi 69.6 72.2 0.96 A E12208 AP Ce-141 pCi 151 165 0.92 A Co-58 pCi 174 178 0.98 A Co-60 pCi 290 227 1.28 w Cr-51 pCi 452 478 0.95 A Cs-134 pCi 215 227 0.95 A Cs-137 pCi 206 198 1.04 A Fe-59 pCi 180 172 1.05 A Mn-54 pCi 265 260 1.02 A Zn-65 pCi 280 315 0.89 A E12209 Water Fe-55 pCi/L 1790 1740 1.03 A E12210 AP Sr-89 pCi 77.8 90.3 0.86 A Sr-90 pCi 9.54 12.2 0.78 w (a) The Analytics known value is equal to 100% of the parameter present in the standard as determined by gravimetric and/or volumetric measurements made during standard preparation (b) Analytics evaluation based on TBE internal QC limits:

A = Acceptable - reported result falls within ratio limits of 0. 80-1.20 W = Acceptable with warning - reported result falls within 0.70-0.80 or 1.20-1.30 N = Not Acceptable - reported result falls outside the ratio limits of< 0. 70 and > 1.30 70

i Analytics Environmental Radioactivity Cross Check Program Teled~ne Brown Enaineerin[i! Environmental Services Page 3 of 4

' I TSE Known Ratio of TSE to Identification Evaluation (bl Month/Year Matrix Nuclide Units Reported Number Value (a) Analytics Result Value September 2018 E12271 Milk Sr-89 pCi/L 79.4 81.7 0.97 A Sr-90 pCi/L 12.2 14.8 0.82 A E12272 Milk Ce-141 pCi/L 152 128 1.19 A Co-58 pCi/L 161 144 1.12 A Co-60 pCi/L 208 190 1.10 A Cr-51 pCi/L 244 265 0.92 A Cs-134 pCi/L 124 123 1.01 A Cs-137 pCi/L 166 147 1.13 A 119 1.32 N(1l Fe-59 pCi/L 158 1-131 pCi/L 83.1 58.2 1.43 Nc2J Mn-54 pCi/L 191 167 1.14 A Zn-65 pCi/L 229 201 1.14 A E12273 Charcoal 1-131 pCi 83.0 80.7 1.03 A E12274 AP Ce-141 pCi 101 85.6 1.18 A Co-58 pCi 92.7 96.0 0.97 A Co-60 pCi 142 127 1.12 A Cr-51 pCi 218 177 1.23 w Cs-134 pCi 81.2 81.9 0.99 A Cs-137 pCi 99.0 98.5 1.01 A Fe-59 pCi 93.7 79.7 1.18 A Mn-54 pCi 116 112 1.04 A Zn-65 pCi 139 134 1.04 A E12302 Water Fe-55 pCi/L 2120 1820 1.17 A E12276 Soil Ce-141 pCi/g 0.259 0.221 1.17 A Co-58 pCi/g 0.279 0.248 1.12 A Co-60 pCi/g 0.367 0.328 1.12 A Cr-51 pCi/g 0.597 0.457 1.31 N (3)

Cs-134 pCi/g 0.261 0.212 1.23 w Cs-137 pCi/g 0.376 0.330 1.14 A Fe-59 pCi/g 0.248 0.206 1.20 A Mn-54 pCi/g 0.317 0.289 1.10 A Zn-65 pCi/g 0.407 0.347 1.17 A (a) The Analytics known value is equal to 100% of the parameter present in the standard as determined by gravimetric and/or volumetric measurements made during standard preparation (b) Analytics evaluation based on TBE internal QC limits:

A= Acceptable - reported result falls within ratio limits of 0.80-1.20 W= Acceptable with warning- reported result falls within 0.70-0.80 or 1.20-1.30 N = Not Acceptable - reported result falls outside the ratio limits of< 0. 70 and > 1. 30 (1) See NCR 18-20 (2) See NCR 18-24 (3) See NCR 18-21 71

j '

' Analytics Environmental Radioactivity Cross Check Program Teled~ne Brown Engineering Environmental Services Page 4 of4 TBE Known Identification Ratio of TBE to MonthNear Matrix Nuclide Units Reported Evaluation (b)

Number Value (a) Analytics Result Value December 2018 E12313 Milk Sr-89 pCi/L 71.9 91.9 0.78 w Sr-90 pCi/L 12.1 13.3 0.91 A E12314 Milk Ce-141 pCi/L 124 133 0.93 A Co-58 pCi/L 110 119 0.93 A Co-60 pCi/L 202 212 0.95 A Cr-51 pCi/L 292 298 0.98 A Cs-134 pCi/L 146 171 0.85 A Cs-137 pCi/L 118 121 0.98 A Fe-59 pCi/L 120 114 1.05 A 1-131 pCi/L 94.2 93.3 1.01 A Mn-54 pCi/L 151 154 0.98 A Zn-65 pCi/L 266 264 1.01 A E12315 Charcoal 1-131 pCi 94.8 89.9 1.05 A E12316A AP Ce-141 pCi 92.3 94.0 0.98 A Co-58 pCi 73.4 83.8 0.88 A Co-60 pCi 137 150 0.91 A Cr-51 pCi 202 210

0.96 A Cs-134 pCi 115 121 0.95 A Cs-137 pCi 85.0 85.4 1.00 A Fe-59 pCi 83.1 80.8 1.03 A Mn-54 pCi 104 109 0.96 A Zn-65 pCi 168 187 0.90 A E12317 Water Fe-55 pCi/L 2110 1840 1.15 A E12318 AP Sr-89 pCi 81.1 83.0 0.98 A Sr-90 pCi 11.4 12.0 0.95 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:

A= Acceptable - reported result fa/ls within ratio limits of 0.80-1.20 W = Acceptable with warning- reported result fa/ls within 0. 70-0.80 or 1.20-1.30 N = Not Acceptable - reported result fa/ls outside the ratio limits of< 0. 70 and > 1. 30 72

! I DOE's Mixed Analyte Performance Evaluation Program (MAPEP)

Teledyne Brown Engineering Environmental Services Page 1 of 1 TBE Identification Known Acceptance MonthNear Matrix Nuclide Units Reported Evaluation (b)

Number Value (a) Range Value February 2018 18-MaS38 Soil Ni-63 Bq/kg 9.94 (1) A Sr-90 Bq/kg 0.846 (1) A 18-MaW38 Water Am-241 Bq/L 0.785 0.709 0.496 - 0.922 A Ni-63 Bq/L 12.6 14.0 9.8 -18.2 A Pu-238 Bq/L 0.0214 0.023 (2) A Pu-239/240 Bq/L 0.544 0.600 0.420 - 0.780 A 18-RdF38 AP U-234/233 Bq/sample 0.111 0.124 0.087 - 0.161 A U-238 Bq/sample 0.123 0.128 0.090 - 0.166 A 18-RdV38 Vegetation Cs-134 Bq/sample 2.46 3.23 2.26 -4.20 w Cs-137 Bq/sample 3.14 3.67 2.57 -4.77 A Co-57 Bq/sample 4.12 4.42 3.09 - 5.75 A Co-60 Bq/sample 1.86 2.29 1.60 - 2.98 A Mn-54 Bq/sample 2.21 2.66 1.86 - 3.46 A Sr-90 Bq/sample NR<3>

Zn-65 Bq/sample -0.201 (1) A November 2018 18-MaS39 Soil Ni-63 Bq/kg 703 765 536 - 995 A Sr-90 Bq/kg 137 193 135 - 251 w 18-MaW39 Water Am-241 Bq/L 0.0363 (1) A Ni-63 Bq/L 6.18 7.0 4.9 - 9.1 A Pu-238 Bq/L 0.73 0.674 0.472 - 0.876 A Pu-239/240 Bq/L 0.89 0.928 0.650 - 1.206 A 18-RdF39 AP U-234/233 Bq/sample 0.159 0.152 0.106- 0.198 A U-238 Bq/sample 0.162 0.158 0.111-0.205 A 18-RdV39 Vegetation Cs-134 Bq/sample 1.85 1.94 1.36 - 2.52 A Cs-137 Bq/sample 2.5 2.36 1.65 - 3.07 A Co-57 Bq/sample 3.53 3.31 2.32 - 4.30 A Co-60 Bq/sample 1.6 1.68 1.18 - 2.18 A Mn-54 Bq/sample 2.61 2.53 1.77 - 3.29 A Bq/sample 0.338 0.791 0.554 - 1.028 NC4)

Sr-90 Zn-65 Bq/sample 1.32 1.37 0.96- 1.78 A (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:

=

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 NR =No result reported (1) False positive test (2) Sensitivity evaluation (3) See NCR 18-09 (4) See NCR 18-25 73

ERA Environmental Radioactivity Cross Check Program Teledyne Brown Engineering Environmental Services Page 1 of 1 TSE Identification Known Acceptance Month/Year Matrix Nuclide Units Reported Evaluation (b)

Number Value(a) Limits Value March 2018 MRAD-28 AP GR-A pCi/sample 65.7 43.4 22.7- 71.5 A GR-B pCi/sample 57.2 52 31.5- 78.6 A April 2018 RAD-113 Water Ba-133 pCi/L 91.2 91.5 77.1-101 A Cs-134 pCi/L 70.4 75.9 62.0 - 83.5 A Cs-137 pCi/L 122 123 111 -138 A Co-60 pCi/L 64.8 64.3 57.9- 73.2 A Zn-65 pCi/L 98.6 86.7 78.0 - 104 A GR-A pCi/L 32.8 28.6 14.6- 37.5 A GR-B pCi/L 62.9 73.7 51.4- 81.1 A LI-Nat pCi/L 6.7 6.93 5.28 - 8.13 A H-3 pCi/L 17100 17200 15000 - 18900 A Sr-89 pCi/L 38.6 48.8 38.3 - 56.2 A Sr-90 pCi/L 27.1 26.5 19.2 - 30.9 A 1-131 pCi/L 26.7 24.6 20.4 - 29.1 A September 2018 MRAD-29 AP GR-A pCi/sample 49.7 55.3 28.9 - 91.1 A AP GR-B pCi/sample 75.3 86.5 52.4 - 131 A October 2018 RAD-115 Water Ba-133 pCi/L 15.2 16.3 11.9 - 19.4 A Cs-134 pCi/L 85.9 93.0 76.4 -102 A Cs-137 pCi/L 229 235 212 - 260 A Co-60 pCi/L 81.9 80.7 72.6 - 91.1 A Zn-65 pCi/L 348 336 302 - 392 A GR-A pCi/L 38.9 60.7 31.8 - 75.4 A GR-B pCi/L 36.5 41.8 27.9 - 49.2 A LI-Nat pCi/L 17.48 20.9 16.8 - 23.4 A H-3 pCi/L 2790 2870 2410 - 3170 A 1-131 pCi/L 26.9 27.2 22.6 - 32.0 A Sr-89 pCi/L 57.2 56.9 45.5 - 64.6 A 22.9- 36.4 N(1)

Sr-90 pCi/L 36.8 31.4 (a) The ERA known value is equal to 100% of the parameter present in the standard as determined by gravimetric and/or volumetric measurements made during standard preparation.

(b) ERA evaluation:

A = Acceptable - Reported value falls within the Acceptance Limits N = Not Acceptable - Reported value falls outside of the Acceptance Limits (1) See NCR 18-23 74

v t e Letter Sequence Request
EPID:L-2018-RNW-0024, Dominion'S Presentation on Surry'S SLRA Safety Meeting-Final (for April 17, 2018) (Approved, Closed)
Initiation Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, ... further results\|Request]] Acceptance, Acceptance Supplement, Supplement, Supplement, Supplement Administration Withholding Request Acceptance Meeting, Meeting, Meeting Questions 11 April 2019 11 April 2019 5 February 2020 Answers 27 June 2019 17 July 2019 3 September 2019 19 September 2019 Results Approval, Approval Other: ML18297A045, ML18319A184, ML18319A252, ML18340A266, ML18340A267, ML18351A051, ML19015A243, ML19044A556, ML19044A659, ML19046A433, ML19098A810, ML19100A254, ML19106A416, ML19107A021, ML19128A079, ML19157A113, ML19169A329, ML19198A059, ML19206A651, ML19267A042, NRC-2018-0247, Federal Register Notice - Surry Power Station, Unit Nos. 1 and 2 - Correction and Extension of Date to Request a Hearing and Petition for Leave to Intervene Regarding the Virginia Electric and Power Company'S Application for Subsequent
MONTHYEAR2019-01-14 [Table View]

ML19127A293

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