ML21119A226
| ML21119A226 | |
| Person / Time | |
|---|---|
| Site: | Surry, 07200002, 07200055  |
| Issue date: | 04/28/2021 |
| From: | Henderson J Virginia Electric & Power Co (VEPCO) |
| To: | Document Control Desk, Office of Nuclear Material Safety and Safeguards, Office of Nuclear Reactor Regulation |
| References | |
| 21-149 | |
| Download: ML21119A226 (75) | |
Text
VIRGINIA ELECTRIC AND POWER COMPANY RICHMOND, VIRGINIA 23261 April 28, 2021 United States Nuclear Regulatory Commission Serial No.21-149 Attention: Document Control Desk S&L/JWD 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, 2020 through December 31, 2020, which includes environmental monitoring for the Surry ISFSI.
If you have any further questions, please contact William Terrry at 757-365-2010.
Attachment Commitments made in this letter: None
Serial No.21-149 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.21-149 Docket Nos.: 50-280 50-281 72-2 72-55 ATTACHMENT 1 2020 Annual Radiological Environmental Operating Report SURRY POWER STATION UNITS 1 AND 2 VIRGINIA ELECTRIC AND POWER COMPANY
Dominion Energy Surry Power Station Radiological Environmental Monitoring Program January 1, 2020 to December 31, 2020
Annual Radiological Environmental Operating Report Surry Power Station January 1, 2020 to December 31, 2020 Prepared by: _ _
ra~L----"-** _____.,,.~-=--=-----~!l~-
u)
J. W. Abbott, Jr.
Health Physicist
/
Reviewed by: ----~----=--~--+~-"""""<--~~~------------
(.) R.Schau Supervisor Radiological Analysis r=---4,-+-~-----------
Reviewed by: _ _ _ _ _ _ _(2--
J. R. Hopkins Superintendent Health Physics Technical Services Approved by=-----~-~V,._____*---=---------
Manage~~~tion and Chemistry
Table of Contents PREFACE ..............................................................................................................................................4
- 1. EXECUTIVE
SUMMARY
..............................................................................................................5
- 2. PROGRAM DESCRIPTION ............................................................................................................7 2.1 Introduction .............................................................................................................................7 2.2 Sampling and Analysis Program .............................................................................................8
- 3. ANALYTICAL RESULTS ............................................................................................................20 3.1 Summary of Results ..............................................................................................................20 3.2 Analytical Results of 2020 REMP Samples .........................................................................28
- 4. DISCUSSION OF RESULTS .....................................................................................................49 4.1 Gamma Exposure Rate .........................................................................................................50 4.2 Airborne Gross Beta .............................................................................................................50 4.3 Airborne Radioiodine............................................................................................................52 4.4 Air Particulate Gamma .........................................................................................................52 4.5 Animal Milk ..........................................................................................................................52 4.6 Food Products .......................................................................................................................53 4.7 Well Water ............................................................................................................................53 4.8 River Water ...........................................................................................................................53 4.9 Silt .........................................................................................................................................54 4.10 Shoreline Sediment .............................................................................................................56 4.11 Fish......................................................................................................................................56 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 3
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.
4
- 1. EXECUTIVE
SUMMARY
This document is a detailed report of the 2020 Surry Power Station Radiological Environmental Monitoring Program (REMP). Radioactivity levels from January 1 through December 31, 2020, 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. Several 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 levels in the environment are so low that analysis values frequently fall below the minimum detection limits of state-of-the-art measurement methods. Because of this, the United States Nuclear Regulatory Commission (USNRC) requires that equipment used for radiological environmental monitoring must be able to detect specified 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.
5
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 2020 airborne results were comparable to previous years. No station related radioactivity was detected and natural radioactivity levels remained at levels consistent with past years results. Aquatic exposure pathway samples include well and river water, silt and shoreline sediments, crabs, fish, clams, and oysters. Naturally occurring radionuclides such as beryllium-7, potassium-40, radium-226, actinium-228, thorium-228, and thorium-232 were detected at average environmental levels. No man-made radionuclides were detected in well water. This trend is consistent throughout the operational environmental monitoring program. No man-made 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 beryllium-7, potassium-40, radium-226, actinium-228, thorium-228, and thorium-232 were detected at average environmental levels. Shoreline sediment, which may provide a direct exposure pathway, contained no station related radionuclides. Naturally occurring radionuclides potassium-40, radium-226, actinium-228, thorium-228, and thorium-232 were detected at average environmental levels. The terrestrial exposure pathway includes milk and food products. Iodine-131 was not detected in any 2020 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.
During 2020, 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 2020 was 0.038 millirem. For reference, this dose may be compared to the 620 millirem average annual exposure to every person in the United States from natural and man-made sources. Natural sources in the environment provide approximately 50% of radiation exposure to man, while nuclear power contributes less than 0.1%.
These results demonstrate compliance with federal and state regulations and demonstrate the adequacy of radioactive effluent controls at Surry Power Station.
6
- 2. PROGRAM DESCRIPTION 2.1 Introduction This report documents the 2020 Surry Power Station operational Radiological Environmental Monitoring Program (REMP). Dominion Energys 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 was 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.
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.
7
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 by 10CFR50, Appendix I, to meet the criterion of "As Low As (is) Reasonably Achievable."
This report documents the results of the REMP for 2020 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 that 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 Table 2-1 summarizes the 2020 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, except for 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.
The Surry Radiological Monitoring Locations map (Figures 1 - 5) denote sample locations for Surry Power Station. The locations are color coded to designate sample types.
8
Table 2-1 SURRY - 2020 RADIOLOGICAL SAMPLING STATIONS DISTANCE AND DIRECTION FROM UNIT NO. 1 Pg. 1 of 3 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 4° Quarterly Site Boundary North North East (06) 0.3 NNE 28° Quarterly Site Boundary North East (07) 0.3 NE 44° Quarterly Site Boundary East North East (08) 0.4 ENE 67° Quarterly Site Boundary East (09) 0.3 E 89° Quarterly Site Boundary West (10) 0.1 W 271° Quarterly Site Boundary West South West (11) 0.4 WSW 252° Quarterly Site Boundary South West (12) 0.3 SW 228° Quarterly Site Boundary South South West (13) 0.3 SSW 201° Quarterly Site Boundary South (14) 0.4 S 182° Quarterly Site Boundary South South East (15) 0.6 SSE 157° Quarterly Site Boundary South East (16) 0.9 SE 135° Quarterly Site Boundary Station Intake (18) 1.6 ESE 115° Quarterly Site Boundary Hog Island Reserve (19) 2.0 NNE 26° Quarterly Near Resident Bacon's Castle (20) 4.5 SSW 202° Quarterly Apx. 5 miles Route 633 (21) 4.9 SW 227° Quarterly Apx. 5 miles Alliance (22) 5.1 WSW 247° Quarterly Apx. 5 miles Surry (23) 7.7 WSW 256° Quarterly Population Center Route 636 and 637 (24) 4.0 W 270° Quarterly Apx. 5 miles Scotland Wharf (25) 5.0 WNW 284° Quarterly Apx. 5 miles Jamestown (26) 6.3 NW 308° Quarterly Apx. 5 miles Colonial Parkway (27) 3.8 NNW 333° Quarterly Apx. 5 miles Route 617 and 618 (28) 4.9 NNW 340° Quarterly Apx. 5 miles Kingsmill (29) 4.6 N 2° Quarterly Apx. 5 miles Williamsburg (30) 7.8 N 0° Quarterly Population Center Kingsmill North (31) 5.5 NNE 12° Quarterly Apx. 5 miles Budweiser (32) 5.8 NNE 27° Quarterly Population Center Water Plant (33) 5.0 NE 46° Quarterly Apx. 5 miles 9
Table 2-1 SURRY - 2020 RADIOLOGICAL SAMPLING STATIONS DISTANCE AND DIRECTION FROM UNIT NO. 1 Pg. 2 of 3 Distance Collection Sample Media Location Station Miles Direction Degrees Frequency Remarks Environmental BASF (34) 5.1 ENE 70° Quarterly Apx. 5 miles TLDs Lee Hall (35) 7.1 ENE 75° Quarterly Population Center Goose Island (36) 5.1 E 90° Quarterly Apx. 5 miles Fort Eustis (37) 4.9 ESE 104° Quarterly Apx. 5 miles Newport News (38) 19.3 SE 130° Quarterly Population Center James River Bridge (39) 17.1 SE 142° Quarterly Control Location Benn's Church (40) 17.0 SSE 159° Quarterly Control Location Smithfield (41) 13.4 SSE 167° Quarterly Control Location Rushmere (42) 5.3 SSE 156° Quarterly Apx. 5 miles Route 628 (43) 5.1 S 177° Quarterly Apx. 5 miles Air Charcoal Surry Station (SS) 0.3 NNE 18° Weekly Site boundary location with highest D/Q and Particulate Hog Island Reserve (HIR) 2.0 NNE 26° Weekly Bacon's Castle (BC) 4.5 SSW 202° Weekly Alliance (ALL) 5.1 WSW 247° Weekly Colonial Parkway (CP) 3.8 NNW 333° Weekly BASF (BASF) 5.1 ENE 70° Weekly Fort Eustis (FE) 4.9 ESE 104° Weekly Newport News (NN) 19.3 SE 130° Weekly Control Location River Water Surry Station Discharge (SD) 0.4 NW 323° Monthly Scotland Wharf (SW) 4.9 WNW 284° Monthly Control Location Well Water Surry Station (SS) 0.1 SW 227° Quarterly Onsite Hog Island Reserve (HIR) 2.0 NNE 28° Quarterly Construction Site (CS) 0.3 E 87° Quarterly Shoreline Hog Island Reserve (HIR) 0.6 N 7° Semi-Annually Sediment Chickahominy River (CHIC) 11.2 WNW 301° Semi-Annually Control Location Silt Chickahominy River (CHIC) 11.2 WNW 300° Semi-Annually Control Location Surry Station Discharge (SD) 0.5 NW 315° Semi-Annually Surry Station Intake (SI) 1.8 ESE 112° Semi-Annually 10
Table 2-1 SURRY - 2020 RADIOLOGICAL SAMPLING STATIONS DISTANCE AND DIRECTION FROM UNIT NO. 1 Pg. 3 of 3 Distance Collection Sample Media Location Station Miles Direction Degrees Frequency Remarks Milk Colonial Parkway (CP) 3.7 NNW 336° Monthly Beachy Farm (BF) 12.0 SW 220° Monthly Control Location Epps (EPPS) 4.8 SSW 200° Monthly Oysters Point of Shoals (POS) 6.4 SSE 157° Semi-Annually Mulberry Point (MP) 4.9 ESE 124° Semi-Annually Swash Hole Island (SHI) 6.8 SE 128° Semi-Annually Clams Chickahominy River (CHIC) 11.2 WNW 300° Semi-Annually Control Location Surry Station Discharge (SD) 1.3 NNW 341° Semi-Annually Jamestown Island (JI) 3.9 NW 324° Semi-Annually Fish Surry Station Discharge (SD) 1.3 NNW 341° Semi-Annually Crabs Surry Station Discharge (SD) 1.3 NNW 341° Annually Crops Brock's Farm (BROCK) 3.8 S 183° Annually (Corn, Peanuts, Slade's Farm (SLADE) 3.2 S 179° Annually Soybeans) 11
Table 2-2 SURRY - 2020 SAMPLE ANALYSIS PROGRAM Pg. 1 of 3 REPORT SAMPLE MEDIA FREQUENCY ANALYSIS LLD* UNITS mR/Std.
Thermoluminescent Quarterly Gamma Dose 6 Quarter Dosimetry (TLD)
Air Iodine Weekly I-131 0.07 pCi/m3 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 I-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 I-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 Footnotes located at end of table.
12
Table 2-2 SURRY - 2020 SAMPLE ANALYSIS PROGRAM Pg. 2 of 3 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 I-131 1 pCi/L 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 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 Cs-134 130 Cs-137 150 Footnotes located at end of table.
13
Table 2-2 SURRY - 2020 SAMPLE ANALYSIS PROGRAM Pg. 3 of 3 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 of nuclides 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 14
15 Figure 2. Surry Emergency Plan Map
- Air Sampling Stations
- Nearest Residents
- TLD Sampling
- Nearest Milk Animal Nearest Garden Aquatic Samples l
16 I~
~~
i I~
I ~
~l' 2
17 1'
,1 *
\IUSHMEREt~, I
- f:::*
II1! ;
...~~ ..
~
. *::~~JM
~~~....
~ t:
- Air Sampling Stations (I Nearest Residents SSE . . :::~x.;~"'<:-:;,..
- (~J~\~~-.-, -
- TLO Sampling Nea,est Garden Nearest Milk Animal Aquatic Samples rS jj)
-<\
- f.i.'--------------------....
- -~~Onqlnlll i: 1891 t,y AOC o4 Aln.iUinurta. inc.* 64-10 General Green way
,:l' Al,mndM VA m,2 USED WITH PERMISSION. No oUitt reproduttion may be m.3de w,thool lhl! wrlllcn µormiulon or ADC
.., ' { WA'lAF , '
~~
,. fJ' w
t JP" .l
~f J. ~
I. -:;
~ ,,. ._ ;:""'
t ,, j i-;- S~rry _ ..,.-;w"~ ,: 7
.J~.*~ ~..-,,-,~*-*~-~ ~
- >URRY ,
~ r,;;\
Alli~ ~
t9'. l t * '-- ' X Pll"-H P~
Stat~ Par.
R *
. .. I\
U , . ,,-...
, . 1-
- : ~ .., '3 ~ . ~ \ . -~"'
- -~..,. )'., ....,. ,. . .C ,., , . ., 0,.,.. -*\
- 1"3/4-* . ., /
~ -~ -~ .
,,,..~,,.,_,.;,nr" WSW-. , !' ,..
~
.~' LAZY OAK
\ CORNER _ .--~
~'
'f: "' .
\,
,c;
......,~ ..,.,,..?,,,.,,... .
10
- /J
-1
/j
- }
a l'
~
.:r r,, _~- !
y
- ~
~,-~.,_..,_ - ~
\
_,,..I'
">*v 6 _
- Ill:,.,~
i 634 .
I ~ -f BACONS
/. "J~,, ~
,.l
.t
.l J . 17 JI>. '
- .=,, * ., .,,,, ":-.J,
.,.. ..... -;,, ,r
@~ * ~ '?. '*1 61 ,* - ,.,._ . . ..... ' -
Q *;
I k,a,
/ ' , ' . * / '".
.. 648 . " (/ ~\ /
\
~
.J(~
v 0- CALlfo**,. ~*- 11 CROSSRO~ ~
' ~-)\"~
r;*
T *
~~ } ~
l '\1 ,; ffi22 ,,j,;,* II :. / / : ~ '
18 (,. . . .,, ' ,1 @,I",,#~,r \ ../ I I ~'
POOLESVILLE ¢1* '.,,, i /
., *H.,
il;,
~ . / *
- 61 f ,,,f I
~ ) \. t ,.;* *'1>.,J \ B.EACHLANO .i *,*...,
,-*. j'r'"l.- \.* * .;, ;/ ;J. ' ~
\t ' b QI '~ 1.
o1 1* .: ~:-.
I , ..~
\ . / I .,,,fiLBER~ ,* / \ -~
~. 1' . *(,.
f, < i .G~
-~
.#" ~~ - Ji .,"'~-"l, ~'
0 ~
l
,; fiJ 62' *
. ~
~
_Qi':
~
~
\ 1
,;- ' *:.... 62 -v.:*
\/!' ~-- , % ' . -~ l J .::!
~ ij ltl:1/
ild
'::.;? .., <JO I1/4>,."', i;
) /
- ,1 , ~,
.',.: ~ \s, ,
~ ,r
-~*==~r--:-,:-
.*.::: ~:
~ 'l( / ~ *
~
Fig ure 4. Surry Emergency Plan Map Air Sampling Stations ( ,.. Nearest Residents TLDSampling . NearestMilkAnimal sW
~~./ "- \, . _ .
~Av, ~wtlfa-* I~\ ~
'A RO ~
r.:.,
oE
~ ,:;;::*:J~ J:: .:,...
~==****
!(:-:.{i:-'=* * =-*
-~ -:-:.*-*
'\
~
'.Y *;
l~~ ~~- S Nearest Garden ' Crop Samples '\\ _ . \ ;, \
*' 8ER YM S 'ti ..,. .:-*~:\* ..... , , ,.i
- lllGI g\ COR I Orlg1Jl8J Ci 1991 by ADO or AloBnd.-la, Inc., 6440 General Green WRy, Alel<Wldrla, VA 22312. USED WITH PERMJSSIOIII No 01ner reproduct10f1 may be me.de wllhout Ille wmien pe11T1,ss;on or ADC.
.J <l,_CY.,~-::-::-<;.:.;) }*;,*
i ..* -i*\::.,# *:, 626} ,/'~~,, ** 0 i f_ *
\
Figure 5. Surry Emergency Plan Map rrt,li)
} ~
N ~~ JIF - ~"
~
- w*' sa ~-
"~ ~N*1
~
'_ 0 '
I
~ t Air Sampling Stations
- T LD Sampling Nearest Garden e
Nearest Residents Nearest MIik Animal Aquatic Samples
~~
\\ <:)
~"-*
r~
~
('ret'k ~ \\~_.
,\
\ NNw* 'S~ 1 1~';fr(&,2
- !*:_;:~;****:, /4!
°"9if,81 1991 by AOC uf Aleiu,,irw,a, lnr:., a,<10 General Graen Way
~on1-~~ -
arhur Alex3Jldna, VA 22312. USED WITH falMJSSlc>>I No oU\olr reprodue1lon may be mo_do ..,lhl)ljl ,~~ /,r!Uon Plllm~ oi AOC. d
~
~;~ ..
<;,- ~:~<-~
o1h W ~...l J~ Ii A ...flU~
~ 1
~I~~,,
NE
~ ~
\ -~
WNW:r
~
,'1\f.R 19
~ I l :~::.,> - - .....
*~~~:~~-- ~
'*t--
w
..:.1/...,,.li,,,
r-I~ r-~)* 1 0 t Ii ~ @ II Gro1*.,
.I.._, _____..___
- 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 provided in Section 4.
20
TABLE 3-1: RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM
SUMMARY
Surry Power Station, Surry County, Virginia - 2020 Docket No. 50-280-281 Page 1 of 7 Medium or Indicator Control Pathway Sampled (Units) Analysis Type I II Total No. LLD Locations 1 - -Mean- -- - - - - - - + Range Location with Highest Mean Distance Name Direction
- - - - - -Mean - ~ - - - - Mean Range Locations Range Non-Routine Reported Measurements Direct Gamma 164 2 22.8 (152/152) STA-9 0.3 mi 22.8 (4/4) 21.7 (11/12) 0 Radiation (22.1 - 23.4) E (20.3 - 24.1) (20.3 - 24.1)
TLD (mR/ Std quarter) Air Gross 416 10 12.1 (363/364) ALL 5.1 mi 13.0 (52/52) 12.6 (52/52) 0 Particulate Beta (4.84 - 23.9) WSW (6.6 - 23.0) (5.0 - 22.1) (1E-3 pCi/m3) ----------------------------------------------------------------------------------------------------------------------------------------------------------- Gamma 32 Be-7 32 122.2 (27/28) ALL 5.1 mi 128.8 (4/4) 128.8 (4/4) 0 (90.7 - 144) WSW (124 - 138) (114 - 140) K-40 32 < LLD N/A < LLD < LLD 0 Cs-134 32 50 < LLD N/A < LLD < LLD 0 Cs-137 32 60 < LLD N/A < LLD < LLD 0 Air Iodine I-131 416 70 < LLD N/A < LLD < LLD 0 (1E-3 pCi/m3) Milk Strontium 4 (pCi/Liter) Sr-89 4 < LLD N/A < LLD < LLD 0 Sr-90 4 1.68 (4/4) CP 3.7 mi 1.68 (4/4) < LLD 0 (1.33 - 2.47) NNW (1.33 - 2.47) Gamma 36 K-40 36 1240 (24/24) 4.8 mi 1262 (12/12) 1119 (10/12) 0 EPPS (1000 - 1380) SSW (1000 - 1380) (929 - 1220) Th-228 36 < LLD N/A < LLD < LLD 0 I-131 36 1 < 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 La-140 36 15 < LLD N/A < LLD < LLD 0 21
TABLE 3-1: RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM
SUMMARY
Surry Power Station, Surry County, Virginia - 2020 Docket No. 50-280-281 Page 2 of 7 Medium or Indicator Control Pathway Analysis Locations Location with Highest Mean Locations Non-Routine Sampled Total Mean Distance Mean Mean Reported (Units) Type No. LLD Range Name Direction Range Range Measurements Food Gamma 3 Products (pCi/kg wet) K-40 3 7173 (3/3) Slade 3.2 mi 13300 (1/1) N/A 0 (2580 - 13300) S (13300-13300) Be-7 3 < LLD N/A < LLD N/A 0 Th-228 3 < LLD N/A < LLD N/A 0 I-131 3 60 < LLD N/A < LLD N/A 0 Cs-134 3 60 < LLD N/A < LLD N/A 0 Cs-137 3 80 < LLD N/A < LLD N/A 0 Well H-3 12 2000 < LLD N/A < LLD N/A 0 Water (pCi/Liter) ----------------------------------------------------------------------------------------------------------------------------------------------------------- Gamma 12 Mn-54 12 15 < LLD N/A < LLD N/A 0 Co-58 12 15 < LLD N/A < LLD N/A 0 Fe-59 12 30 < LLD N/A < LLD N/A 0 Co-60 12 15 < LLD N/A < LLD N/A 0 Zn-65 12 30 < LLD N/A < LLD N/A 0 22
TABLE 3-1: RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM
SUMMARY
Surry Power Station, Surry County, Virginia - 2020 Docket No. 50-280-281 Page 3 of 7 Medium or Indicator Control Pathway Analysis Locations Location with Highest Mean Locations Non-Routine Sampled Total Mean Distance Mean Mean Reported (Units) Type No. LLD Range Name Direction Range Range Measurements Well 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 I-131 12 1 < 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 < LLD N/A < LLD 61.9 (1/12) 0 (61.9 - 61.9) Ra-226 24 < LLD N/A < LLD < LLD 0 Th-228 24 < LLD N/A < LLD < LLD 0 Mn-54 24 15 < LLD N/A < LLD < LLD 0 Co-58 24 15 < LLD N/A < LLD < LLD 0 Fe-59 24 30 < LLD N/A < LLD < LLD 0 Co-60 24 15 < LLD N/A < LLD < LLD 0 Zn-65 24 30 < LLD N/A < LLD < LLD 0 23
TABLE 3-1: RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM
SUMMARY
Surry Power Station, Surry County, Virginia - 2020 Docket No. 50-280-281 Page 4 of 7 Medium or Indicator Control Pathway Analysis Locations Location with Highest Mean Locations Non-Routine Sampled Total Mean Distance Mean Mean Reported (Units) Type No. LLD Range Name Direction Range Range 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 I-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 (pCi/kg dry) Be-7 6 2620 (2/4) SD 1.3 mi 2800 (1/2) < LLD 0 (2440 -2800) NNW (2800 -2800) K-40 6 14750 (4/4) SI 1.8 mi 15300 (2/2) 14450 (2/2) 0 (13900-16600) ESE (14000-16600) (14000-14900) Cs-134 6 150 < LLD N/A < LLD < LLD 0 Cs-137 6 180 163 (1/4) SD 1.3 mi 163 (1/4) < LLD 0 (163 - 163) NNW (163 - 163) Ra-226 6 2480 (3/4) SI 1.8 mi 2590 (1/2) 2175 (2/2) 0 (2390 - 2590) ESE (2590 - 2590) (1610 - 2740) Th-228 6 921.3 (4/4) SD 1.3 mi 977.5 (2/2) 910.5 (2/2) 0 (819 - 1090) NNW (865 - 1090) (781 - 1040) Th-232 6 1036 (2/4) SD 1.3 mi 1250 (1/2) 970 (1/2) 0 (822 - 1250) NNW (1250 - 1250) (970 - 970) Ac-228 6 1120.7 (3/4) SI 1.8 mi 1220 (2/2) 1071.5 (2/2) 0 (922 - 1260) ESE (1180 - 1260) (973 - 1170) 24
TABLE 3-1: RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM
SUMMARY
Surry Power Station, Surry County, Virginia - 2020 Docket No. 50-280-281 Page 5 of 7
~------r------
Medium or Indicator Control Pathway Analysis Locations Location with Highest Mean Locations Non-Routine Sampled (Units) Type ITotal I I--- No. LLD Mean Range Distance Name Direction Mean Range Mean Range Reported Measurements Shoreline K-40 4 4605 (2/2) HIR 0.6 mi 4605 (2/2) 2115 (2/2) 0 Sediment (4450 - 4760) N (4450 - 4760) (1370 - 2860) (pCi/kg dry) Cs-134 4 150 < LLD N/A < LLD < LLD 0 Cs-137 4 180 < LLD N/A < LLD 18.5 (1/2) 0 (18.5 - 18.5) Ra-226 4 < LLD N/A < LLD 1400 (1/2) 0 (1400 - 1400) Th-228 4 188 (2/2) HIR 0.6 mi 188 (2/2) 244.5 (2/2) 0 (136 - 240) N (136 - 240) (141 - 348) Th-232 4 234 (1/2) HIR 0.6 mi 234 (1/2) 376 (1/2) 0 (234 - 234) N (234 - 234) (376 - 376) Fish Gamma 4 (pCi/kg wet) K-40 4 1700 (4/4) SD 1.3 mi 1700 (4/4) N/A 0 (1570 - 1800) NNW (1570 - 1800) 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 - 2020 Docket No. 50-280-281 Page 6 of 7 Medium or Indicator Control Pathway Analysis Locations Location with Highest Mean Locations Non-Routine Sampled Total Mean Distance Mean Mean Reported (Units) Type No. LLD Range Name Direction Range Range Measurements Oysters Gamma 6 K-40 6 < LLD N/A < LLD N/A 0 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 Zn-65 6 260 < LLD N/A < LLD N/A 0 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 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 26
TABLE 3-1: RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM
SUMMARY
Surry Power Station, Surry County, Virginia - 2020 Docket No. 50-280-281 Page 7 of 7 Medium or Indicator Control Pathway Analysis Locations Location with Highest Mean Locations Non-Routine Sampled Total Mean Distance Mean Mean Reported (Units) Type No. LLD Range Name Direction Range Range Measurements Crabs Gamma 1 (pCi/kg wet) K-40 1 < LLD N/A < LLD N/A 0 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 1 260 < LLD N/A < LLD N/A 0 Cs-134 1 130 < LLD N/A < LLD N/A 0 Cs-137 1 150 < LLD N/A < LLD N/A 0 27
3.2 Analytical Results of 2020 REMP Samples Radiological analyses of environmental media characteristically approach and frequently fall below the detection limits of state-of-the-art measurement methods. The reported error is two times the standard deviation (2) 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 2 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. 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 Surry ODCM. 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 I-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 28
TABLE 3-2: GAMMA EXPOSURE RATE Surry Power Station, Surry County, Virginia - 2020 MDDQ = 3 x Q = 3 x 1.0 = 5 Note: IF MDDQ < 5 mR, THEN MDDQ rounded to 5 mR (ANSI N13.37) MDDA = 3 x A = 3 x 2.3 = 10 Note: IF MDDA < 10 mR, THEN MDDA rounded to 10 mR (ANSI N13.37) Moni- Quarterly Normalized Quarterly Quarterly Facility Annual Annual Annual toring Baseline, Monitoring Data, MQ Dose,a Base- Moni- Facility Loca- BQ (mrem per standard FQ = MQ - BQ line, BA toring Dose,b tion Baseline, quarter) (mrem) (mrem) Data, FA = (mrem) MA MA - BA 1 2 3 4 1 2 3 4 (mrem) (mrem) 2 19.8 19.7 20.2 18.8 18.3 ND ND ND ND 79.2 77.0 ND 3 19.2 18.4 19.6 19.1 17.5 ND ND ND ND 76.9 74.6 ND 4 17.9 17.3 17.9 17.1 17.1 ND ND ND ND 71.7 69.5 ND 5 19.0 18.4 18.4 18.4 18.1 ND ND ND ND 76.0 73.3 ND 6 18.4 16.9 18.9 17.8 16.8 ND ND ND ND 73.8 70.4 ND 7 18.7 16.9 18.9 17.1 15.8 ND ND ND ND 74.6 68.7 ND 8 17.0 16.2 16.7 15.8 15.5 ND ND ND ND 68.4 64.2 ND 9 23.2 22.1 23.3 23.4 22.2 ND ND ND ND 92.8 91.0 ND 10 18.1 17.0 17.9 17.8 14.5 ND ND ND ND 72.5 67.2 ND 11 16.1 16.6 16.2 15.7 15.9 ND ND ND ND 64.2 64.4 ND 12 16.6 16.1 16.7 15.4 14.6 ND ND ND ND 66.4 62.8 ND 13 18.6 18.0 19.6 18.0 16.9 ND ND ND ND 74.5 72.5 ND 14 17.9 17.8 18.8 17.0 15.6 ND ND ND ND 71.6 69.2 ND 15 18.5 18.4 19.0 17.4 16.9 ND ND ND ND 74.1 71.7 ND 16 17.0 17.7 17.4 16.7 15.7 ND ND ND ND 67.7 67.5 ND 18 14.5 15.3 15.6 14.5 13.3 ND ND ND ND 58.0 58.7 ND 19 15.5 15.5 16.0 14.5 14.4 ND ND ND ND 62.1 60.4 ND 20 14.3 12.9 15.0 13.4 12.9 ND ND ND ND 57.4 54.2 ND 21 15.1 16.0 14.9 15.4 14.7 ND ND ND ND 60.5 61.0 ND 22 13.2 13.7 13.2 12.7 12.0 ND ND ND ND 52.7 51.7 ND 23 18.1 18.9 19.4 17.7 17.5 ND ND ND ND 72.3 73.5 ND 24 14.8 14.7 14.6 14.1 14.0 ND ND ND ND 59.2 57.4 ND 25 18.1 18.3 18.2 17.7 17.8 ND ND ND ND 72.3 72.0 ND 26 15.7 15.5 15.4 15.1 14.2 ND ND ND ND 62.9 60.2 ND 27 14.7 15.0 14.0 13.8 13.6 ND ND ND ND 58.7 56.3 ND 28 14.2 14.6 13.6 13.5 12.8 ND ND ND ND 56.8 54.4 ND 29 13.2 14.1 13.8 12.1 12.5 ND ND ND ND 52.9 52.5 ND 30 14.4 14.4 14.6 13.8 13.3 ND ND ND ND 57.7 56.1 ND 31 12.3 12.7 13.1 12.1 11.2 ND ND ND ND 49.2 49.2 ND 32 15.2 15.1 14.6 13.5 13.6 ND ND ND ND 60.7 56.7 ND 33 14.2 14.5 14.7 14.4 14.6 ND ND ND ND 57.1 58.2 ND 34 16.0 15.9 16.9 15.8 15.1 ND ND ND ND 64.1 63.7 ND 35 18.6 19.5 19.1 19.1 17.4 ND ND ND ND 74.4 75.1 ND 36 18.6 21.3 20.1 18.4 17.5 ND ND ND ND 74.4 77.4 ND 37 15.4 15.3 15.8 14.8 14.9 ND ND ND ND 61.7 60.7 ND 38 20.9 18.7 17.7 18.1 17.2 ND ND ND ND 83.6 71.6 ND 39 14.9 15.8 15.0 14.8 15.1 ND ND ND ND 59.7 60.7 ND 40 16.2 15.7 16.9 15.8 14.9 ND ND ND ND 64.7 63.4 ND 41 21.8 24.1 20.9 21.4 20.3 ND ND ND ND 87.3 86.7 ND 42 16.4 16.0 16.9 16.4 15.3 ND ND ND ND 65.5 64.6 ND 43 14.3 14.7 14.8 14.1 13.9 ND ND ND ND 57.3 57.4 ND a ND = Not detected, where MQ < (BQ + MDDQ) b ND = Not detected, where MA < (BA + MDDA) d = Damaged TLDs; m = Missing TLDs; v = Vendor reports TLD not received N/A = Missing or Damaged TLD Reading Not Available for Calculation Note: Table formatted in accordance with ANSI/HPS N13.37-2014, Environmental Dosimetry - Criteria for system Design and Implementation. 29
TABLE 3-3: GROSS BETA CONCENTRATION IN FILTERED AIR Surry Power Station, Surry County, Virginia - 2020 1.0E-3 pCi/m3 +/- 2 Sigma Page 1 of 2 COLLECTION SAMPLING LOCATIONS DATE SS HIR BC ALL CP BASF FE NN-C January 07 7.09 +/- 2.20 7.11 +/- 2.15 11.5 +/- 2.44 9.72 +/- 2.34 9.73 +/- 2.31 9.47 +/- 2.25 9.23 +/- 2.26 9.28 +/- 2.27 January 14 8.35 +/- 2.77 9.92 +/- 2.77 10.6 +/- 2.85 9.76 +/- 2.82 9.33 +/- 2.81 13.6 +/- 2.98 9.36 +/- 2.76 10.9 +/- 2.86 January 21 15.6 +/- 2.97 13.6 +/- 2.79 13.8 +/- 2.84 16.2 +/- 2.96 14.6 +/- 2.86 12.0 +/- 2.68 18.0 +/- 3.00 15.0 +/- 2.89 January 28 11.1 +/- 2.71 11.8 +/- 2.69 14.1 +/- 2.88 16.6 +/- 3.05 13.8 +/- 2.85 12.2 +/- 2.73 10.8 +/- 2.66 14.4 +/- 2.89 February 04 9.85 +/- 2.54 8.50 +/- 2.39 11.7 +/- 2.63 10.4 +/- 2.57 12.1 +/- 2.62 13.6 +/- 2.69 10.1 +/- 2.49 8.98 +/- 2.42 February 10 9.01 +/- 2.73 7.78 +/- 2.58 10.3 +/- 2.83 9.29 +/- 2.81 9.28 +/- 2.79 11.4 +/- 2.88 8.70 +/- 2.74 6.98 +/- 2.62 February 18 10.1 +/- 2.33 8.80 +/- 2.20 12.1 +/- 2.39 11.3 +/- 2.36 10.3 +/- 2.27 10.5 +/- 2.25 10.5 +/- 2.27 11.7 +/- 2.34 February 25 14.5 +/- 2.98 15.8 +/- 2.98 19.2 +/- 3.20 15.0 +/- 3.01 18.0 +/- 3.13 18.7 +/- 3.12 19.4 +/- 3.20 21.5 +/- 3.32 March 03 13.5 +/- 2.81 10.3 +/- 2.55 10.1 +/- 2.53 14.0 +/- 2.84 11.2 +/- 2.62 8.21 +/- 2.67 11.4 +/- 2.62 11.1 +/- 2.62 March 10 7.16 +/- 2.39 9.25 +/- 2.46 9.35 +/- 2.50 10.6 +/- 2.63 8.06 +/- 2.42 6.23 +/- 2.29 10.3 +/- 2.55 11.1 +/- 2.6 March 17 9.56 +/- 2.66 11.0 +/- 2.68 11.6 +/- 2.76 9.65 +/- 2.68 12.1 +/- 2.76 11.8 +/- 2.72 11.8 +/- 2.75 10.5 3 2.69 March 24 11.8 +/- 2.68 9.48 +/- 2.46 13.4 +/- 2.74 11.3 +/- 2.65 12.9 +/- 2.72 12.0 +/- 2.62 13.9 +/- 2.76 13.0 +/- 2.73 March 31 10.3 2.68 6.91 2.35 8.99 2.57 10.4 2.70 8.80 2.55 8.94 2.50 7.86 2.48 10.4 2.64 April 07 5.77 +/- 2.41 7.62 +/- 2.56 0.00 +/- 0.00 B 6.56 +/- 2.49 8.24 +/- 2.55 9.39 +/- 2.57 8.79 +/- 2.59 11.8 +/- 2.77 April 14 15.6 +/- 2.90 12.9 +/- 2.74 15.2 +/- 2.91 17.8 +/- 3.10 14.5 +/- 2.87 14.5 +/- 2.83 16.4 +/- 2.98 17.2 +/- 3.02 April 21 15.6 +/- 3.12 14.6 +/- 3.04 13.6 +/- 2.80 15.2 +/- 2.93 12.6 +/- 2.75 14.5 +/- 2.78 15.2 +/- 2.86 14.8 +/- 2.82 April 28 9.42 +/- 2.32 8.16 +/- 2.22 7.88 +/- 2.48 10.0 +/- 2.65 6.46 +/- 2.38 9.18 +/- 2.51 9.44 +/- 2.57 9.31 +/- 2.56 May 05 8.56 +/- 2.68 7.71 +/- 2.59 9.34 +/- 2.66 8.71 +/- 2.64 8.65 +/- 2.60 8.14 +/- 2.51 10.1 +/- 2.66 10.4 +/- 2.71 May 12 10.2 +/- 2.59 7.69 +/- 2.40 7.83 +/- 2.45 10.1 +/- 2.61 8.56 +/- 2.50 8.90 +/- 2.47 6.73 +/- 2.37 9.35 +/- 2.55 May 19 10.8 +/- 2.59 9.19 +/- 2.46 9.67 +/- 2.52 10.2 +/- 2.59 9.67 +/- 2.52 10.1 +/- 2.49 7.74 +/- 2.39 7.71 +/- 2.40 May 26 5.63 +/- 2.30 4.99 +/- 2.22 7.15 +/- 2.39 8.07 +/- 2.48 6.34 +/- 2.35 7.97 +/- 2.40 6.12 +/- 2.31 5.01 +/- 2.26 June 02 7.80 +/- 2.37 4.84 +/- 2.13 5.62 +/- 2.19 7.28 +/- 2.33 8.34 +/- 2.35 5.64 +/- 2.12 6.51 +/- 2.21 7.65 +/- 2.31 June 09 18.1 +/- 2.94 13.8 +/- 2.67 15.2 +/- 2.86 14.8 +/- 2.87 18.5 +/- 3.03 13.9 +/- 2.74 18.6 +/- 3.00 16.9 +/- 2.94 June 16 11.0 +/- 2.68 7.91 +/- 2.44 8.71 +/- 2.48 8.37 +/- 2.49 7.56 +/- 2.39 7.70 +/- 2.36 7.47 +/- 2.38 9.97 +/- 2.55 June 23 11.3 +/- 2.59 9.16 +/- 2.41 8.75 +/- 2.43 9.26 +/- 2.52 9.13 +/- 2.45 8.50 +/- 2.36 7.95 +/- 2.37 9.44 +/- 2.47 June 30 19.4 +/- 3.24 15.7 +/- 2.98 16.3 +/- 3.07 17.8 +/- 3.20 17.8 +/- 3.15 18.2 +/- 3.11 17.4 +/- 3.13 19.9 +/- 3.26 B = Visual inspection indicated very little particulate material on filter; result not included. 30
TABLE 3-3: GROSS BETA CONCENTRATION IN FILTERED AIR Surry Nuclear Power Station, Surry County, Virginia - 2020 1.0E-3 pCi/m3 +/- 2 Sigma Page 2 of 2 COLLECTION SAMPLING LOCATIONS DATE SS HIR BC ALL CP BASF FE NN July 07 14.3 +/- 3.10 12.6 +/- 2.95 14.1 +/- 3.08 14.1 +/- 3.13 13.7 +/- 3.04 12.7 +/- 2.95 14.8 +/- 3.06 15.7 +/- 3.16 July 14 14.4 +/- 2.68 11.7 +/- 2.48 10.8 +/- 2.46 12.0 +/- 2.58 14.2 +/- 2.68 12.1 +/- 2.51 13.0 +/- 2.60 12.7 +/- 2.60 July 21 20.4 +/- 3.64 17.0 +/- 3.41 17.2 +/- 3.48 15.5 +/- 3.42 21.6 +/- 3.44 18.7 +/- 3.23 20.7 +/- 3.35 22.1 +/- 3.44 July 28 16.5 +/- 2.77 17.0 +/- 2.77 19.9 +/- 3.00 18.8 +/- 2.95 13.6 +/- 2.83 16.3 +/- 2.92 16.0 +/- 2.94 13.3 +/- 2.82 August 03 8.84 +/- 2.81 9.25 +/- 2.82 11.1 +/- 3.00 12.7 +/- 3.12 11.2 +/- 2.97 10.3 +/- 2.85 10.1 +/- 2.90 9.65 +/- 2.86 August 11 9.50 +/- 2.42 10.2 +/- 2.44 13.3 +/- 2.67 13.8 +/- 2.73 11.9 +/- 2.58 10.4 +/- 2.46 13.0 +/- 2.64 11.7 +/- 2.57 August 18 7.30 +/- 2.44 10.2 +/- 2.59 12.6 +/- 2.88 10.6 +/- 2.78 13.3 +/- 2.90 11.2 +/- 2.73 9.06 +/- 2.63 12.2 +/- 2.84 August 25 15.5 +/- 3.01 15.0 +/- 2.95 17.1 +/- 3.06 18.9 +/- 3.18 16.9 +/- 3.05 15.7 +/- 2.92 17.4 +/- 3.02 17.5 +/- 3.08 September 01 17.6 +/- 2.95 13.5 +/- 2.72 19.1 +/- 3.06 17.4 +/- 3.13 20.0 +/- 3.08 17.3 +/- 2.89 14.0 +/- 2.73 18.7 +/- 3.00 September 08 15.5 +/- 2.91 14.8 +/- 2.86 19.5 +/- 3.17 18.7 +/- 3.18 17.6 +/- 3.09 16.4 +/- 2.96 19.5 +/- 3.17 17.7 +/- 3.10 September 14 7.04 +/- 2.26 6.43 +/- 2.19 8.24 +/- 2.38 7.82 +/- 2.38 7.87 +/- 2.33 7.15 +/- 2.23 7.18 +/- 2.26 6.03 +/- 2.20 September 21 9.16 +/- 2.71 10.4 +/- 2.76 10.2 +/- 2.81 11.6 +/- 2.94 12.9 +/- 2.95 8.79 +/- 2.66 11.5 +/- 2.85 9.48 +/- 2.76 September 29 19.3 +/- 2.98 14.2 +/- 2.71 23.9 +/- 3.23 23.0 +/- 3.24 21.6 +/- 3.12 19.3 +/- 2.95 17.9 +/- 2.93 19.4 +/- 3.01 October 06 9.71 +/- 2.55 7.85 +/- 2.41 11.6 +/- 2.69 12.9 +/- 2.79 10.3 +/- 2.58 12.3 +/- 2.64 11.3 +/- 2.62 11.9 +/- 2.70 October 13 12.5 +/- 2.49 13.2 +/- 2.50 14.5 +/- 2.70 17.7 +/- 2.91 17.9 +/- 2.87 15.4 +/- 2.69 14.9 +/- 2.69 17.0 +/- 2.85 October 19 6.72 +/- 2.58 6.30 +/- 2.53 8.40 +/- 2.43 8.00 +/- 2.44 7.20 +/- 2.32 5.81 +/- 2.25 5.50 +/- 2.18 9.92 +/- 2.50 October 27 5.93 +/- 2.55 5.62 +/- 2.51 9.83 +/- 3.09 9.10 +/- 3.11 7.53 +/- 2.93 7.68 +/- 2.90 7.16 +/- 2.91 7.74 +/- 2.98 November 03 8.03 +/- 2.34 10.9 +/- 2.49 10.2 +/- 2.45 9.33 +/- 2.42 8.35 +/- 2.32 9.75 +/- 2.34 8.64 +/- 2.31 9.86 +/- 2.42 November 10 12.7 +/- 2.56 13.1 +/- 2.59 15.8 +/- 2.86 15.9 +/- 2.91 15.5 +/- 2.85 17.5 +/- 2.90 17.5 +/- 2.94 13.0 +/- 2.72 November 17 11.0 +/- 2.72 11.2 +/- 2.72 16.7 +/- 3.04 16.3 +/- 3.07 15.1 +/- 2.93 13.9 +/- 2.81 13.7 +/- 2.83 14.7 +/- 2.93 November 24 12.0 +/- 2.82 11.7 +/- 2.79 14.9 +/- 3.42 14.6 +/- 3.46 13.0 +/- 3.31 12.6 +/- 3.21 14.1 +/- 3.33 9.09 +/- 2.83 December 01 15.0 +/- 2.77 12.1 +/- 2.61 15.0 +/- 2.54 17.4 +/- 2.69 16.5 +/- 2.59 15.7 +/- 2.50 15.9 +/- 2.55 15.0 +/- 2.57 December 07 7.11 +/- 2.35 5.54 +/- 2.22 9.55 +/- 2.62 10.2 +/- 2.71 9.93 +/- 2.65 7.94 +/- 2.46 7.73 +/- 2.48 8.92 +/- 2.63 December 15 14.3 +/- 2.27 12.8 +/- 2.17 17.0 +/- 2.46 17.7 +/- 2.52 15.2 +/- 2.34 15.6 +/- 2.33 18.5 +/- 2.52 18.5 +/- 2.57 December 22 12.3 +/- 2.58 10.7 +/- 2.45 14.2 +/- 2.75 16.0 +/- 2.88 14.6 +/- 2.75 11.0 +/- 2.49 14.9 +/- 2.74 14.3 +/- 2.77 December 29 11.1 +/- 2.66 9.48 +/- 2.55 13.7 +/- 2.76 15.2 +/- 2.90 13.0 +/- 2.72 11.0 +/- 2.56 14.3 +/- 2.79 13.0 +/- 2.80 31
TABLE 3-4: IODINE-131 CONCENTRATION IN FILTERED AIR Surry Power Station, Surry County, Virginia - 2020 1.0E-3 pCi/m3 +/- 2 Sigma Page 1 of 2 COLLECTION SAMPLING LOCATIONS DATE SS HIR BC ALL CP BASF FE NN-C January 07 -15.9 +/- 15.1 -15.4 +/- 14.7 -15.4 +/- 14.7 -15.5 +/- 14.8 -1.33 +/- 25.3 -1.29 +/- 24.6 -1.31 +/- 24.9 -1.31 +/- 25.0 January 14 -5.57 +/- 12.5 -5.37 +/- 12.0 -5.46 +/- 12.2 -5.48 +/- 12.3 2.99 +/- 13.8 2.91 +/- 13.4 2.92 +/- 13.4 2.93 +/- 13.5 January 21 -1.48 +/- 9.96 -1.43 +/- 9.58 -1.46 +/- 9.77 -1.45 +/- 9.74 -3.27 +/- 17.1 -3.20 +/- 16.7 -3.20 +/- 16.7 -3.25 +/- 17.0 January 28 10.9 +/- 21.0 10.6 +/- 20.4 10.8 +/- 20.8 11.0 +/- 21.1 7.29 +/- 14.0 7.17 +/- 13.7 7.19 +/- 13.8 7.25 +/- 13.9 February 04 -3.66 +/- 11.3 -3.52 +/- 10.9 -3.60 +/- 11.2 -3.63 +/- 11.2 3.67 +/- 11.6 3.62 +/- 11.4 3.64 +/- 11.5 3.62 +/- 11.4 February 10 -10.0 +/- 12.1 -9.67 +/- 11.7 -10.2 +/- 12.3 -10.4 +/- 12.5 2.41 +/- 13.3 2.36 +/- 13.0 2.39 +/- 13.2 2.37 +/- 13.1 February 18 3.22 +/- 13.3 3.12 +/- 12.9 3.12 +/- 12.9 3.17 +/- 13.1 -0.26 +/- 8.00 -0.25 +/- 7.82 -0.25 +/- 7.90 -0.25 +/- 7.85 February 25 -2.00 +/- 10.9 -1.93 +/- 10.5 -1.97 +/- 10.7 -2.00 +/- 10.9 -0.53 +/- 13.5 -0.22 +/- 5.56 -0.53 +/- 13.5 -0.53 +/- 13.5 March 03 0.39 +/- 10.4 0.38 +/- 9.98 0.37 +/- 9.91 0.39 +/- 10.3 -0.26 +/- 10.5 -0.29 +/- 11.7 -0.26 +/- 10.4 -0.26 +/- 10.4 March 10 0.80 +/- 11.0 0.77 +/- 10.6 0.79 +/- 10.7 0.81 +/- 11.0 -0.68 +/- 14.9 -0.67 +/- 14.8 -0.67 +/- 14.8 -0.67 +/- 14.8 March 17 -6.48 +/- 11.6 -6.28 +/- 11.3 -6.41 +/- 11.5 -6.53 +/- 11.7 -2.07 +/- 42.1 -2.04 +/- 41.5 -2.07 +/- 42.0 -2.08 +/- 42.2 March 24 -2.81 +/- 19.5 -2.69 +/- 18.7 -2.75 +/- 19.0 -2.80 +/- 19.4 -2.77 +/- 8.39 -2.26 +/- 6.82 -2.74 +/- 8.29 -2.77 +/- 8.36 March 31 -9.91 15.7 -9.23 14.7 -9.73 15.5 -9.96 15.8 -7.76 9.79 -7.54 9.52 -7.71 9.73 -7.71 9.73 April 07 6.55 +/- 10.5 6.58 +/- 10.6 6.34 +/- 10.2 6.61 +/- 10.6 -4.87 +/- 10.4 -4.73 +/- 10.1 -4.86 +/- 10.4 -4.85 +/- 10.3 April 14 1.92 +/- 8.06 1.91 +/- 7.99 1.95 +/- 8.16 1.99 +/- 8.36 3.98 +/- 27.8 3.88 +/- 27.2 3.97 +/- 27.8 3.97 +/- 27.8 April 21 4.16 +/- 9.93 4.09 +/- 9.77 3.65 +/- 8.70 3.71 +/- 8.86 5.86 +/- 10.8 5.65 +/- 10.4 5.73 +/- 10.5 5.69 +/- 10.5 April 28 1.51 +/- 16.1 1.49 +/- 15.9 1.69 +/- 18.1 1.72 +/- 18.4 4.25 +/- 16.7 4.16 +/- 16.3 4.21 +/- 16.5 4.22 +/- 16.5 May 05 -5.06 +/- 9.41 -4.99 +/- 9.27 -4.96 +/- 9.22 -4.99 +/- 9.28 1.31 +/- 16.3 1.27 +/- 15.7 1.29 +/- 15.9 1.31 +/- 16.2 May 12 3.44 +/- 12.0 3.37 +/- 11.8 3.43 +/- 12.0 3.46 +/- 12.1 4.76 +/- 15.8 4.64 +/- 15.4 4.73 +/- 15.7 4.73 +/- 15.7 May 19 -17.1 +/- 17.1 -16.8 +/- 16.8 -17.0 +/- 17.1 -17.3 +/- 17.3 -3.99 +/- 14.2 -3.86 +/- 13.7 -3.95 +/- 14.0 -3.96 +/- 14.1 May 26 -6.67 +/- 10.9 -6.55 +/- 10.7 -6.63 +/- 10.9 -6.75 +/- 11.0 0.40 +/- 8.16 0.39 +/- 7.91 0.40 +/- 8.05 0.23 +/- 4.58 June 02 -3.69 +/- 13.5 -3.62 +/- 13.3 -3.61 +/- 13.2 -3.66 +/- 13.4 -5.62 +/- 14.6 -5.47 +/- 14.2 -5.56 +/- 14.4 -5.60 +/- 14.5 June 09 0.11 +/- 12.2 0.11 +/- 12.0 0.12 +/- 12.8 0.12 +/- 13.0 -6.22 +/- 29.6 -6.08 +/- 28.9 -6.10 +/- 29.0 -6.17 +/- 29.3 June 16 -10.6 +/- 23.4 -10.3 +/- 22.8 -10.4 +/- 22.9 -10.5 +/- 23.2 6.11 +/- 12.8 3.37 +/- 7.03 6.08 +/- 12.7 6.10 +/- 12.7 June 23 12.5 +/- 20.3 12.2 +/- 19.8 12.5 +/- 20.3 12.9 +/- 20.8 -4.62 +/- 12.0 -4.50 +/- 11.7 -4.61 +/- 12.0 -4.60 +/- 11.9 June 30 -4.84 +/- 14.0 -4.71 +/- 13.6 -4.82 +/- 13.9 -4.92 +/- 14.2 -0.88 +/- 23.5 -0.86 +/- 22.8 -0.88 +/- 23.3 -0.88 +/- 23.4 32
TABLE 3-4: IODINE-131 CONCENTRATION IN FILTERED AIR Surry Power Station, Surry County, Virginia - 2020 1.0E-3 pCi/m3 +/- 2 Sigma Page 2 of 2 COLLECTION SAMPLING LOCATIONS DATE SS HIR BC ALL CP BASF FE NN-C July 07 -13.2 +/- 22.3 -12.9 +/- 21.7 -13.1 +/- 22.1 -13.4 +/- 22.6 8.31 +/- 14.4 8.17 +/- 14.2 8.13 +/- 14.1 8.32 +/- 14.4 July 14 3.44 +/- 15.3 3.37 +/- 15.0 3.42 +/- 15.3 3.50 +/- 15.6 6.96 +/- 16.0 6.78 +/- 15.5 6.92 +/- 15.9 6.97 +/- 16.0 July 21 -7.51 +/- 19.3 -7.35 +/- 18.9 -7.52 +/- 19.3 -7.61 +/- 19.6 11.6 +/- 16.7 11.3 +/- 16.2 11.4 +/- 16.3 11.4 +/- 16.4 July 28 8.55 +/- 10.9 8.43 +/- 10.7 8.75 +/- 11.1 8.77 +/- 11.2 -6.08 +/- 16.9 -2.49 +/- 6.92 -6.03 +/- 16.8 -6.09 +/- 16.9 August 03 10.3 +/- 12.8 10.2 +/- 12.8 10.5 +/- 13.1 10.6 +/- 13.2 -4.20 +/- 8.69 -4.08 +/- 8.44 -4.17 +/- 8.65 -4.13 +/- 8.56 August 11 -0.29 +/- 9.93 -0.29 +/- 9.80 -0.30 +/- 10.0 -0.30 +/- 10.2 3.11 +/- 11.2 3.06 +/- 11.0 3.11 +/- 11.2 3.09 +/- 11.1 August 18 -3.76 +/- 9.73 -3.70 +/- 9.58 -4.03 +/- 10.4 -4.07 +/- 10.5 2.84 +/- 13.4 2.31 +/- 10.9 2.80 +/- 13.2 2.82 +/- 13.3 August 25 -8.04 +/- 16.9 -7.92 +/- 16.6 -8.01 +/- 16.8 -8.08 +/- 16.9 -7.54 +/- 11.7 -3.73 +/- 5.80 -7.32 +/- 11.4 -7.49 +/- 11.6 September 01 2.61 +/- 14.5 2.60 +/- 14.4 2.64 +/- 14.7 2.84 +/- 15.8 -7.99 +/- 11.5 -7.73 +/- 11.1 -7.84 +/- 11.3 -7.85 +/- 11.3 September 08 -8.58 +/- 17.5 -8.55 +/- 17.4 -8.75 +/- 17.8 -8.93 +/- 18.2 2.56 +/- 20.3 2.48 +/- 19.6 2.54 +/- 20.1 2.55 +/- 20.2 September 14 7.41 +/- 12.8 7.33 +/- 12.7 7.52 +/- 13.0 7.62 +/- 13.2 -3.78 +/- 14.4 -3.68 +/- 14.0 -3.74 +/- 14.2 -3.78 +/- 14.4 September 21 -8.51 +/- 18.4 -8.43 +/- 18.3 -8.66 +/- 18.7 -8.84 +/- 19.1 -1.85 +/- 19.9 -1.80 +/- 19.4 -1.83 +/- 19.7 -1.85 +/- 19.9 September 29 -2.97 +/- 7.08 -2.94 +/- 7.01 -3.02 +/- 7.20 -3.08 +/- 7.33 2.96 +/- 5.83 2.88 +/- 5.67 2.94 +/- 5.79 2.95 +/- 5.80 October 06 0.61 +/- 19.1 0.60 +/- 18.9 0.62 +/- 19.4 0.63 +/- 19.6 -4.24 +/- 12.0 -4.11 +/- 11.7 -4.18 +/- 11.9 -2.05 +/- 5.83 October 13 2.88 +/- 14.3 2.83 +/- 14.1 3.04 +/- 15.2 3.09 +/- 15.4 -5.01 +/- 9.26 -4.87 +/- 9.01 -4.96 +/- 9.16 -5.04 +/- 9.32 October 19 9.43 +/- 19.2 9.34 +/- 19.0 8.07 +/- 16.4 8.20 +/- 16.7 -2.04 +/- 18.8 -2.06 +/- 19.1 -2.00 +/- 18.5 -2.03 +/- 18.7 October 27 -4.01 +/- 11.6 -3.32 +/- 9.62 -4.39 +/- 12.7 -4.49 +/- 13.0 -7.84 +/- 8.72 -7.69 +/- 8.56 -7.81 +/- 8.69 -7.89 +/- 8.78 November 03 -1.09 +/- 7.54 -1.08 +/- 7.48 -1.07 +/- 7.42 -0.50 +/- 3.42 -1.06 +/- 7.28 -0.65 +/- 6.34 -0.66 +/- 6.45 -0.68 +/- 6.57 November 10 0.58 +/- 6.77 0.58 +/- 6.80 0.62 +/- 7.28 0.64 +/- 7.42 -4.53 +/- 10.8 -4.39 +/- 10.4 -4.48 +/- 10.7 -3.78 +/- 9.01 November 17 -1.70 +/- 8.38 -1.69 +/- 8.33 -1.71 +/- 8.44 -1.74 +/- 8.60 -19.8 +/- 32.0 -19.3 +/- 31.2 -19.6 +/- 31.7 -19.9 +/- 32.2 November 24 2.26 +/- 13.1 2.24 +/- 13.0 2.84 +/- 16.5 2.90 +/- 16.8 -11.9 +/- 19.8 -11.5 +/- 19.2 -11.7 +/- 19.5 -11.8 +/- 19.7 December 01 -25.2 +/- 22.0 -25.1 +/- 22.0 -23.1 +/- 20.2 -23.4 +/- 20.4 21.8 +/- 39.3 21.2 +/- 38.2 21.5 +/- 38.8 22.4 +/- 40.5 December 07 2.07 +/- 9.22 2.05 +/- 9.14 2.19 +/- 9.78 2.24 +/- 9.98 2.18 +/- 9.73 12.7 +/- 12.8 12.9 +/- 13.0 13.3 +/- 13.4 December 15 2.31 +/- 5.84 2.30 +/- 5.83 2.39 +/- 6.05 2.44 +/- 6.17 1.09 +/- 6.54 1.06 +/- 6.35 1.08 +/- 6.45 1.12 +/- 6.69 December 22 5.01 +/- 18.0 4.93 +/- 17.7 5.28 +/- 18.9 5.34 +/- 19.2 -11.1 +/- 25.5 -10.8 +/- 24.8 -10.9 +/- 25.0 -11.2 +/- 25.8 December 29 -6.53 +/- 25.9 -6.46 +/- 25.7 -6.42 +/- 25.5 -6.58 +/- 26.1 1.60 +/- 10.3 1.56 +/- 10.0 1.58 +/- 10.2 1.64 +/- 10.5 33
TABLE 3-5: GAMMA EMITTER CONCENTRATION IN FILTERED AIR Surry Power Station, Surry County, Virginia - 2020 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 SS Cs-134 -0.28 +/- 0.82 -0.37 +/- 0.94 0.06 +/- 0.64 0.11 +/- 0.80 Cs-137 0.32 +/- 0.73 0.19 +/- 0.74 0.31 +/- 0.60 -0.06 +/- 0.07 Be-7 114 +/- 22.9 137 +/- 26.1 134 +/- 19.9 105 +/- 20.0 123 +/- 31.0 K-40 14.9 +/- 13.7 A HIR Cs-134 -0.27 +/- 0.91 0.36 +/- 0.84 0.05 +/- 0.78 -0.10 +/- 0.92 Cs-137 0.52 +/- 0.69 -0.03 +/- 0.59 0.59 +/- 0.56 A 0.40 +/- 0.70 Be-7 115 +/- 22.0 127 +/- 21.8 109 +/- 21.1 90.7 +/- 20.5 110 +/- 30.3 BC Cs-134 -0.22 +/- 0.66 -0.13 +/- 1.06 0.02 +/- 0.92 0.58 +/- 0.66 Cs-137 0.39 +/- 0.55 0.02 +/- 0.76 0.44 +/- 0.76 -0.32 +/- 0.63 Be-7 134 +/- 22.5 118 +/- 30.1 122 +/- 25.6 114 +/- 21.6 122 +/- 17.3 ALL Cs-134 0.04 +/- 0.66 -0.16 +/- 0.54 -0.05 +/- 0.79 -0.20 +/- 0.70 Cs-137 -0.07 +/- 0.58 0.53 +/- 0.48 A -0.33 +/- 0.59 0.35 +/- 0.58 Be-7 138 +/- 22.1 126 +/- 22.8 127 +/- 21.5 124 +/- 21.7 129 +/- 12.6 CP Cs-134 -0.52 +/- 0.63 0.38 +/- 0.70 -0.39 +/- 0.86 -0.39 +/- 0.92 Cs-137 -0.64 +/- 0.69 -0.15 +/- 0.46 0.12 +/- 0.72 0.40 +/- 0.67 Be-7 144 +/- 23.1 119 +/- 23.9 117 +/- 24.7 125 +/- 21.4 126 +/- 24.6 BASF Cs-134 -0.65 +/- 0.68 -0.64 +/- 0.96 -0.80 +/- 0.80 -0.06 +/- 1.04 Cs-137 0.22 +/- 0.56 -0.05 +/- 1.00 -0.55 +/- 0.50 0.27 +/- 0.94 Be-7 122 +/- 20.3 126 +/- 24.3 117 +/- 19.4 107 +/- 22.3 118 +/- 16.4 FE Cs-134 -0.01 +/- 0.63 -0.66 +/- 0.78 0.14 +/- 0.89 -0.07 +/- 0.63 Cs-137 -0.35 +/- 0.57 0.05 +/- 0.69 0.51 +/- 0.76 0.07 +/- 0.58 Be-7 127 +/- 19.5 128 +/- 26.4 141 +/- 23.0 115 +/- 18.9 128 +/- 21.3 NN-C Cs-134 -0.11 +/- 0.68 0.46 +/- 0.81 -0.08 +/- 1.00 -0.43 +/- 0.81 Cs-137 -0.04 +/- 0.59 0.20 +/- 0.54 -0.09 +/- 0.96 -0.48 +/- 0.61 Be-7 139 +/- 22.6 122 +/- 22.5 140 +/- 29.2 114 +/- 20.1 129 +/- 25.7 K-40 12.1 +/- 10.5 A A: < MDC 34
TABLE 3-6: GAMMA EMITTER AND STRONTIUM CONCENTRATIONS IN MILK Surry Power Station, Surry County, Virginia - 2020 pCi/Liter +/- 2 Sigma Page 1 of 3 COLONIAL BEACHY NUCLIDE EPPS PARKWAY FARM-C JANUARY Cs-134 0.32 +/- 4.02 -1.24 +/- 6.45 Cs-137 0.56 +/- 3.95 -1.66 +/- 5.60 Ba-140 14.7 +/- 14.7 A -1.76 +/- 17.3 B La-140 -1.23 +/- 3.87 -0.53 +/- 7.10 I-131 0.18 +/- 0.40 0.56 +/- 0.48 A K-40 1,250 +/- 137 1,120 +/- 178 FEBRUARY Cs-134 -5.43 +/- 6.34 -0.71 +/- 5.11 Cs-137 -4.31 +/- 6.04 1.60 +/- 6.01 Ba-140 3.37 +/- 20.1 -7.45 +/- 16.1 B La-140 -0.79 +/- 6.82 2.20 +/- 5.57 I-131 -0.31 +/- 0.39 -0.03 +/- 0.53 K-40 1240 +/- 198 1110 +/- 172 MARCH Cs-134 2.34 +/- 5.50 -4.79 +/- 5.39 1.20 +/- 4.29 Cs-137 -3.17 +/- 5.15 -2.68 +/- 4.90 -0.23 +/- 4.03 Ba-140 -10.2 +/- 15.5 -6.88 +/- 17.3 -4.01 +/- 13.7 La-140 -0.36 +/- 6.75 0.56 +/- 4.24 -2.68 +/- 4.37 I-131 0.16 +/- 0.46 -0.87 +/- 5.56 -0.11 +/- 0.42 K-40 1,000 +/- 202 1300 +/- 206 929 +/- 162 Sr-89 2.32 +/- 2.11 A Sr-90 2.47 +/- 0.54 APRIL Cs-134 0.51 +/- 4.34 0.68 +/- 5.08 -0.72 +/- 5.69 Cs-137 -2.00 +/- 4.42 -2.94 +/- 4.27 -0.80 +/- 5.93 Ba-140 -2.03 +/- 15.1 -7.37 +/- 15.8 -6.77 +/- 19.9 La-140 -2.53 +/- 4.05 1.60 +/- 4.46 1.56 +/- 4.90 I-131 -0.12 +/- 0.31 -0.02 +/- 0.38 -0.01 +/- 0.26 K-40 1360 +/- 165 1240 +/- 168 1220 +/- 190
- Sr-89/90 analysis performed quarterly on location Colonial Parkway only.
A: <MDC B: Milk sample unavailable due to seasonal unavalibility. 35
TABLE 3-6: GAMMA EMITTER AND STRONTIUM CONCENTRATIONS IN MILK Surry Power Station, Surry County, Virginia - 2020 pCi/Liter +/- 2 Sigma Page 2 of 3 COLONIAL BEACHY NUCLIDE EPPS PARKWAY FARM-C MAY Cs-134 4.39 +/- 5.32 -3.81 +/- 3.89 -2.45 +/- 5.84 Cs-137 0.51 +/- 4.61 -1.22 +/- 4.00 -3.31 +/- 5.11 Ba-140 1.06 +/- 15.5 -1.17 +/- 13.2 8.29 +/- 20.6 La-140 -1.45 +/- 5.89 -0.17 +/- 4.24 0.67 +/- 4.61 I-131 0.40 +/- 0.47 0.00 +/- 0.23 0.24 +/- 0.42 K-40 1260 +/- 164 1100 +/- 135 1040 +/- 186 JUNE Cs-134 -2.04 +/- 3.82 -0.42 +/- 3.73 -0.69 +/- 3.64 Cs-137 -0.44 +/- 4.24 3.40 +/- 3.73 0.93 +/- 3.95 Ba-140 -1.20 +/- 14.1 8.44 +/- 13.0 -13.6 +/- 14.1 La-140 0.09 +/- 4.30 2.91 +/- 3.95 -8.00 +/- 5.76 I-131 -0.08 +/- 0.35 0.34 +/- 0.42 0.05 +/- 0.32 K-40 1370 +/- 165 1270 +/- 132 1180 +/- 174 Sr-89 3.24 +/- 2.66 A Sr-90 1.33 +/- 0.63 JULY Cs-134 1.41 +/- 4.62 0.37 +/- 5.46 1.28 +/- 4.87 Cs-137 1.50 +/- 4.28 1.02 +/- 5.26 -0.45 +/- 6.08 Ba-140 18.3 +/- 20.5 29.5 +/- 22.1 A -3.04 +/- 21.5 La-140 -1.24 +/- 6.61 1.30 +/- 7.20 0.88 +/- 7.16 I-131 -0.47 +/- 0.50 0.03 +/- 0.45 0.02 +/- 0.42 K-40 1180 +/- 166 1200 +/- 186 1190 +/- 196 AUGUST Cs-134 -0.24 +/- 4.97 -0.80 +/- 5.41 -2.16 +/- 5.01 Cs-137 -1.49 +/- 5.38 0.53 +/- 5.20 3.47 +/- 4.96 Ba-140 6.82 +/- 18.0 1.17 +/- 17.3 5.29 +/- 16.3 La-140 2.21 +/- 4.87 0.94 +/- 5.41 1.49 +/- 4.40 I-131 0.20 +/- 0.43 0.03 +/- 0.39 0.09 +/- 0.44 K-40 1320 +/- 178 1260 +/- 169 1110 +/- 162
- Sr-89/90 analysis performed quarterly on location Colonial Parkway only.
A: <MDC 36
TABLE 3-6: GAMMA EMITTER AND STRONTIUM CONCENTRATIONS IN MILK Surry Power Station, Surry County, Virginia - 2020 pCi/Liter +/- 2 Sigma Page 3 of 3 COLONIAL BEACHY NUCLIDE EPPS PARKWAY FARM-C SEPTEMBER Cs-134 -2.04 +/- 4.81 -4.41 +/- 5.10 2.00 +/- 4.73 Cs-137 3.62 +/- 4.09 4.69 +/- 4.90 0.77 +/- 4.98 Ba-140 3.24 +/- 17.7 7.22 +/- 15.7 -0.25 +/- 16.3 La-140 1.24 +/- 6.28 1.23 +/- 4.00 -2.61 +/- 4.67 I-131 0.46 +/- 0.51 0.20 +/- 0.45 0.14 +/- 0.42 K-40 1170 +/- 202 1300 +/- 193 1050 +/- 168 Sr-89 2.13 +/- 2.89 Sr-90 1.42 +/- 0.52 OCTOBER Cs-134 1.49 +/- 4.39 3.78 +/- 5.39 0.63 +/- 5.15 Cs-137 1.77 +/- 4.29 0.51 +/- 5.38 -1.48 +/- 4.51 Ba-140 -6.76 +/- 15.4 0.26 +/- 18.6 9.30 +/- 17.7 La-140 3.44 +/- 5.09 1.05 +/- 6.27 2.66 +/- 5.17 I-131 0.31 +/- 0.50 0.21 +/- 0.39 0.29 +/- 0.46 K-40 1380 +/- 197 1210 +/- 183 1210 +/- 169 NOVEMBER Cs-134 -0.84 +/- 5.29 1.29 +/- 5.55 4.50 +/- 5.12 Cs-137 -0.83 +/- 4.02 -2.45 +/- 4.63 -0.48 +/- 4.43 Ba-140 0.05 +/- 18.9 -9.83 +/- 17.0 -3.86 +/- 17.9 La-140 2.80 +/- 5.71 -1.57 +/- 4.82 0.33 +/- 5.51 I-131 0.56 +/- .52 A 0.61 +/- 0.52 A 0.20 +/- 0.48 K-40 1330 +/- 158 1230 +/- 180 1130 +/- 157 DECEMBER Cs-134 -3.45 +/- 6.29 0.46 +/- 5.56 4.79 +/- 5.76 Cs-137 0.68 +/- 4.55 -4.97 +/- 5.34 3.10 +/- 4.87 Ba-140 -19.6 +/- 19.7 7.42 +/- 22.4 8.52 +/- 20.1 La-140 1.80 +/- 4.43 -1.96 +/- 5.81 -2.80 +/- 5.90 I-131 0.22 +/- 0.41 0.10 +/- 0.43 -0.06 +/- 0.47 K-40 1280 +/- 180 1290 +/- 190 1130 +/- 197 Sr-89 0.24 +/- 2.40 Sr-90 1.48 +/- 0.59
*Sr-89/90 analysis performed quarterly on location Colonial Parkway only.
A: <MDC 37
TABLE 3-7: GAMMA EMITTER CONCENTRATION IN FOOD PRODUCTS Surry Power Station, Surry County, Virginia - 2020 pCi/kg (wet) +/- 2 Sigma Page 1 of 1 SAMPLING COLLECTION SAMPLE LOCATIONS DATE TYPE ISOTOPE Cs-134 Cs-137 I-131 K-40 BROCK 11/17/2020 Peanuts 7.04 +/- 6.62 A 5.33 +/- 5.97 -7.74 +/- 35.8 5640 +/- 271 FARM 11/17/2020 Corn 2.89 +/- 4.86 2.23 +/- 4.62 33.7 +/- 28.1 A 2580 +/- 164 Cs-134 Cs-137 I-131 K-40 SLADE 12/1/2020 Soybeans 8.51 +/- 17.8 -8.04 +/- 17.7 6.96 +/- 25.9 13300 +/- 1000 FARM A: <MDC 38
TABLE 3-8: GAMMA EMITTER AND TRITIUM CONCENTRATIONS IN WELL WATER Surry Power Station, Surry County, Virginia - 2020 pCi/Liter +/- 2 Sigma Page 1 of 2 SAMPLING COLLECTION LOCATIONS DATE ISOTOPE Mn-54 Co-58 Fe-59 Co-60 Zn-65 SS 3/24/2020 -1.75 +/- 4.36 2.60 +/- 4.72 -0.38 +/- 9.13 2.29 +/- 4.32 -16.2 +/- 10.6 6/2/2020 -0.58 +/- 4.56 -0.07 +/- 4.02 -1.10 +/- 6.59 -2.58 +/- 5.19 -8.05 +/- 8.50 9/1/2020 -0.46 +/- 3.48 0.51 +/- 3.35 1.48 +/- 10.0 1.09 +/- 2.95 -3.22 +/- 9.03 12/1/2020 -1.23 +/- 3.33 1.05 +/- 3.02 2.01 +/- 7.37 0.22 +/- 3.02 -6.97 +/- 7.92 Nb-95 Zr-95 I-131 Cs-134 Cs-137 3/24/2020 -0.48 +/- 4.54 -1.44 +/- 7.77 0.04 +/- 0.35 0.05 +/- 4.27 0.71 +/- 4.82 6/2/2020 -1.11 +/- 3.17 -4.61 +/- 6.15 -0.09 +/- 0.46 -1.36 +/- 4.40 1.08 +/- 3.70 9/1/2020 0.90 +/- 3.92 -1.31 +/- 6.06 -0.11 +/- 0.33 -0.22 +/- 3.74 2.26 +/- 4.03 12/1/2020 0.18 +/- 3.70 -3.47 +/- 6.68 0.29 +/- 0.44 1.31 +/- 3.88 3.82 +/- 3.57 A Ba-140 La-140 H-3 3/24/2020 4.01 +/- 17.3 6.06 +/- 7.11 89.2 +/- 608 6/2/2020 -12.8 +/- 15.2 -0.92 +/- 3.87 -70.5 +/- 398 9/1/2020 -6.73 +/- 17.8 1.75 +/- 5.19 64.3 +/- 417 12/1/2020 11.4 +/- 13.6 -1.39 +/- 3.54 -10.0 +/- 418 Mn-54 Co-58 Fe-59 Co-60 Zn-65 HIR 3/24/2020 1.63 +/- 3.79 -1.09 +/- 3.53 2.99 +/- 6.99 -3.35 +/- 3.84 -4.28 +/- 6.76 6/2/2020 0.60 +/- 2.93 -0.85 +/- 2.78 7.61 +/- 7.29 A 1.28 +/- 3.15 -6.33 +/- 7.52 9/1/2020 1.57 +/- 3.28 -1.41 +/- 2.82 3.97 +/- 7.50 1.63 +/- 4.47 3.55 +/- 7.64 12/1/2020 0.89 +/- 3.68 0.37 +/- 3.35 -6.76 +/- 8.15 0.37 +/- 4.58 -4.11 +/- 9.16 Nb-95 Zr-95 I-131 Cs-134 Cs-137 3/24/2020 1.62 +/- 3.60 -0.37 +/- 6.27 -0.13 +/- 0.32 -0.40 +/- 3.91 0.23 +/- 3.97 6/2/2020 -0.97 +/- 2.34 -0.59 +/- 5.12 0.57 +/- 0.47 A -0.97 +/- 3.77 -0.23 +/- 3.59 9/1/2020 0.20 +/- 3.73 3.25 +/- 6.74 0.57 +/- 0.49 A 1.50 +/- 4.04 1.70 +/- 3.85 12/1/2020 -3.51 +/- 3.49 2.33 +/- 6.06 0.01 +/- 0.50 1.72 +/- 4.27 1.10 +/- 3.49 Ba-140 La-140 H-3 3/24/2020 0.82 +/- 16.6 2.37 +/- 4.36 -140 +/- 603 6/2/2020 -3.71 +/- 11.6 0.42 +/- 4.51 -10.8 +/- 400 9/1/2020 1.51 +/- 14.4 2.30 +/- 3.40 50.1 +/- 421 12/1/2020 -6.07 +/- 16.8 3.94 +/- 4.81 34.9 +/- 420 A: < MDC 39
TABLE 3-8: GAMMA EMITTER AND TRITIUM CONCENTRATIONS IN WELL WATER Surry Power Station, Surry County, Virginia - 2020 pCi/Liter +/- 2 Sigma Page 2 of 2 SAMPLING COLLECTION LOCATIONS DATE ISOTOPE Mn-54 Co-58 Fe-59 Co-60 Zn-65 TC 3/24/2020 1.66 +/- 3.45 1.32 +/- 3.88 4.70 +/- 7.40 1.50 +/- 3.98 5.46 +/- 8.47 6/2/2020 0.42 +/- 3.31 -1.89 +/- 2.80 1.38 +/- 5.15 3.18 +/- 3.18 -4.23 +/- 8.54 9/1/2020 -0.05 +/- 3.78 2.21 +/- 4.94 -4.26 +/- 8.72 0.55 +/- 4.24 -11.5 +/- 11.7 12/1/2020 -1.49 +/- 3.90 2.73 +/- 4.23 2.33 +/- 7.26 -0.04 +/- 3.97 -10.5 +/- 9.74 Nb-95 Zr-95 I-131 Cs-134 Cs-137 3/24/2020 1.49 +/- 3.92 -0.82 +/- 6.41 0.09 +/- 0.45 -1.49 +/- 3.13 -1.84 +/- 4.47 6/2/2020 0.20 +/- 3.01 -0.31 +/- 5.26 -0.09 +/- 0.44 0.56 +/- 3.60 -1.85 +/- 3.37 9/1/2020 -2.13 +/- 4.88 -1.96 +/- 8.31 0.30 +/- 0.41 -1.73 +/- 4.28 -3.85 +/- 5.54 12/1/2020 -2.66 +/- 3.96 -4.25 +/- 7.54 0.03 +/- 0.46 -0.11 +/- 4.64 1.13 +/- 4.77 Ba-140 La-140 H-3 3/24/2020 1.15 +/- 16.3 4.36 +/- 4.69 116 +/- 619 6/2/2020 -1.83 +/- 12.7 1.01 +/- 3.66 346 +/- 427 9/1/2020 -2.95 +/- 14.8 0.19 +/- 4.69 -54.1 +/- 405 12/1/2020 5.39 +/- 16.6 -0.78 +/- 5.44 50.1 +/- 424 40
TABLE 3-9: GAMMA EMITTER AND TRITIUM CONCENTRATIONS IN RIVER WATER Surry Power Station, Surry County, Virginia - 2020 pCi/Liter +/- 2 Sigma Page 1 of 2 SAMPLING COLLECTION LOCATIONS DATE ISOTOPE Mn-54 Co-58 Fe-59 Co-60 Zn-65 SD 1/7/2020 0.10 +/- 2.13 -1.27 +/- 2.30 -0.88 +/- 4.14 0.21 +/- 2.30 -2.82 +/- 4.46 2/4/2020 1.38 +/- 4.07 -2.61 +/- 3.80 6.21 +/- 7.80 1.82 +/- 4.57 -6.24 +/- 10.1 3/10/2020 -0.20 +/- 4.61 -2.21 +/- 4.02 0.00 +/- 6.98 -3.20 +/- 6.11 -7.57 +/- 8.18 4/7/2020 -3.56 +/- 4.01 4.15 +/- 3.93 A 3.48 +/- 7.57 0.64 +/- 3.88 -2.58 +/- 7.67 5/5/2020 -2.41 +/- 3.13 -2.94 +/- 3.44 2.52 +/- 7.42 2.10 +/- 4.00 -8.08 +/- 8.39 6/2/2020 -1.33 +/- 3.41 -2.31 +/- 3.76 2.65 +/- 7.18 -2.66 +/- 3.17 -0.07 +/- 8.65 7/7/2020 -2.33 +/- 3.67 -4.50 +/- 4.10 -5.26 +/- 6.63 0.37 +/- 3.78 -9.58 +/- 8.77 8/3/2020 1.94 +/- 4.08 0.42 +/- 3.64 4.40 +/- 7.87 -2.29 +/- 3.41 -3.04 +/- 7.82 9/1/2020 -2.05 +/- 4.27 1.00 +/- 3.40 -4.74 +/- 7.85 2.09 +/- 5.27 -2.44 +/- 9.27 10/6/2020 -2.09 +/- 3.60 -0.11 +/- 3.62 -0.94 +/- 8.03 -0.24 +/- 3.96 -10.0 +/- 9.54 11/3/2020 -2.01 +/- 3.50 -2.84 +/- 3.51 -2.00 +/- 8.30 -0.25 +/- 5.34 1.72 +/- 8.92 12/1/2020 -0.87 +/- 3.24 0.85 +/- 4.10 8.34 +/- 6.49 A 1.66 +/- 3.64 -4.70 +/- 8.93 Nb-95 Zr-95 I-131 Cs-134 Cs-137 1/7/2020 1.96 +/- 2.27 -1.76 +/- 3.93 -1.19 +/- 3.33 0.64 +/- 2.31 0.23 +/- 2.16 2/4/2020 6.68 +/- 4.36 A 3.47 +/- 7.19 4.06 +/- 4.76 -0.20 +/- 3.97 -0.77 +/- 4.05 3/10/2020 4.78 +/- 4.34 A -3.29 +/- 7.73 -1.33 +/- 3.88 3.83 +/- 4.33 -0.18 +/- 4.38 4/7/2020 0.26 +/- 3.53 -3.64 +/- 6.15 -2.43 +/- 5.04 0.36 +/- 3.96 -3.94 +/- 4.10 5/5/2020 -3.21 +/- 3.67 -4.23 +/- 5.78 -3.73 +/- 4.48 -0.63 +/- 3.73 -2.05 +/- 3.71 6/2/2020 1.33 +/- 3.55 -5.71 +/- 5.81 -4.79 +/- 4.48 -4.78 +/- 4.19 0.21 +/- 3.14 7/7/2020 -0.97 +/- 3.92 -3.21 +/- 6.37 -0.08 +/- 5.83 1.25 +/- 3.67 -2.11 +/- 4.18 8/3/2020 2.81 +/- 4.03 -4.13 +/- 5.71 -1.01 +/- 4.32 2.87 +/- 4.08 -0.04 +/- 3.93 9/1/2020 1.89 +/- 4.54 1.54 +/- 6.81 -1.42 +/- 4.23 -3.51 +/- 4.71 -2.63 +/- 4.30 10/6/2020 3.16 +/- 3.43 2.12 +/- 5.70 -1.04 +/- 4.27 -2.59 +/- 4.08 0.43 +/- 3.99 11/3/2020 -0.27 +/- 2.69 -0.69 +/- 6.47 -1.82 +/- 4.95 -1.95 +/- 4.43 1.75 +/- 4.69 12/1/2020 -3.10 +/- 3.89 3.94 +/- 7.59 1.25 +/- 4.16 -0.32 +/- 3.49 2.66 +/- 3.94 Ba-140 La-140 H-3 1/7/2020 0.36 +/- 9.69 -1.60 +/- 3.19 2/4/2020 -4.50 +/- 15.1 2.18 +/- 5.49 3/10/2020 -6.07 +/- 16.9 2.11 +/- 5.80 -85.1 +/- 449 4/7/2020 -3.43 +/- 15.4 -0.19 +/- 4.93 5/5/2020 1.17 +/- 15.4 -0.92 +/- 4.61 6/2/2020 8.08 +/- 14.7 -2.27 +/- 4.53 -140 +/- 441 7/7/2020 1.83 +/- 16.2 -5.85 +/- 4.87 8/3/2020 2.46 +/- 12.9 2.93 +/- 3.54 9/1/2020 -14.9 +/- 16.3 -5.42 +/- 6.97 98.7 +/- 460 10/6/2020 -5.84 +/- 12.8 1.48 +/- 5.03 11/3/2020 9.88 +/- 14.6 -1.96 +/- 6.75 12/1/2020 -9.74 +/- 14.4 2.18 +/- 4.52 -262 +/- 560 A: < MDC 41
TABLE 3-9: GAMMA EMITTER AND TRITIUM CONCENTRATIONS IN RIVER WATER Surry Power Station, Surry County, Virginia - 2020 pCi/Liter +/- 2 Sigma Page 2 of 2 SAMPLING COLLECTION LOCATIONS DATE ISOTOPES Mn-54 Co-58 Fe-59 Co-60 Zn-65 SW-C 1/7/2020 -2.07 +/- 2.03 0.05 +/- 1.85 -0.49 +/- 4.50 1.54 +/- 2.06 0.85 +/- 5.07 2/4/2020 2.76 +/- 4.00 -0.32 +/- 3.78 -0.57 +/- 7.34 2.98 +/- 3.95 -2.27 +/- 9.37 3/10/2020 0.65 +/- 4.57 -1.58 +/- 3.98 3.96 +/- 7.89 -2.49 +/- 3.85 0.90 +/- 8.83 4/7/2020 -0.07 +/- 3.80 0.30 +/- 3.16 2.79 +/- 5.55 -0.55 +/- 2.84 0.54 +/- 8.22 5/5/2020 0.53 +/- 3.42 -0.49 +/- 3.42 1.85 +/- 7.12 -0.84 +/- 3.85 1.38 +/- 6.73 6/2/2020 -1.61 +/- 3.50 -0.24 +/- 4.45 -2.91 +/- 9.32 2.20 +/- 4.42 -0.10 +/- 8.47 7/7/2020 -0.32 +/- 3.83 -0.05 +/- 3.64 0.69 +/- 6.46 0.17 +/- 4.09 -12.3 +/- 10.0 8/3/2020 1.71 +/- 4.83 2.78 +/- 3.67 2.28 +/- 8.62 0.85 +/- 5.05 -2.04 +/- 8.93 9/1/2020 2.30 +/- 3.59 2.15 +/- 3.65 -0.50 +/- 7.71 0.56 +/- 3.52 -1.10 +/- 8.67 10/6/2020 0.41 +/- 3.58 -1.29 +/- 3.33 1.88 +/- 6.57 0.26 +/- 3.34 -6.72 +/- 9.24 11/3/2020 -0.69 +/- 3.64 1.91 +/- 4.37 -2.69 +/- 7.80 -0.98 +/- 4.35 0.87 +/- 9.07 12/1/2020 -1.00 +/- 3.56 -1.08 +/- 3.72 1.74 +/- 5.19 2.07 +/- 3.58 -2.16 +/- 7.42 Nb-95 Zr-95 I-131 Cs-134 Cs-137 1/7/2020 0.31 +/- 1.96 2.02 +/- 3.97 -1.48 +/- 3.34 -0.90 +/- 2.17 -0.06 +/- 2.13 2/4/2020 -0.63 +/- 4.01 -4.04 +/- 5.43 2.63 +/- 4.43 0.66 +/- 3.86 -3.98 +/- 4.39 3/10/2020 0.19 +/- 4.13 -1.31 +/- 6.64 -1.18 +/- 5.58 3.61 +/- 4.75 0.44 +/- 4.33 4/7/2020 0.86 +/- 3.43 -4.25 +/- 6.01 -3.09 +/- 4.03 0.27 +/- 3.53 0.95 +/- 3.11 5/5/2020 -1.63 +/- 3.14 1.91 +/- 5.70 -4.16 +/- 4.85 0.80 +/- 3.60 -0.87 +/- 3.23 6/2/2020 -0.19 +/- 4.30 0.48 +/- 8.66 -1.49 +/- 4.85 4.10 +/- 5.31 3.35 +/- 4.55 7/7/2020 1.20 +/- 4.35 -1.76 +/- 6.83 -0.04 +/- 6.05 1.63 +/- 3.72 -1.02 +/- 3.93 8/3/2020 -0.91 +/- 3.74 8.98 +/- 6.85 A -0.40 +/- 4.14 3.10 +/- 3.94 -2.85 +/- 3.82 9/1/2020 4.13 +/- 3.43 A 0.14 +/- 6.61 2.29 +/- 4.48 2.50 +/- 4.23 -1.44 +/- 3.71 10/6/2020 3.01 +/- 3.90 0.26 +/- 6.65 1.09 +/- 4.02 -2.77 +/- 3.21 1.98 +/- 3.90 11/3/2020 2.78 +/- 4.05 -0.92 +/- 6.05 -4.90 +/- 5.57 2.67 +/- 4.07 2.68 +/- 3.61 12/1/2020 3.00 +/- 3.88 2.78 +/- 5.58 -1.23 +/- 4.42 2.56 +/- 3.81 1.87 +/- 3.74 Ba-140 La-140 H-3 K-40 Th-232 1/7/2020 -2.30 +/- 9.37 -0.20 +/- 3.14 61.9 +/- 57.6 8.75 +/- 7.60 A 2/4/2020 -5.59 +/- 14.6 0.37 +/- 5.26 3/10/2020 -1.56 +/- 16.1 -0.45 +/- 4.70 -384 +/- 418 4/7/2020 5.12 +/- 13.4 -1.32 +/- 4.56 5/5/2020 -0.81 +/- 13.3 -0.11 +/- 5.07 6/2/2020 13.1 +/- 14.8 -2.71 +/- 4.97 -239 +/- 434 7/7/2020 -12.3 +/- 16.5 -4.29 +/- 7.05 8/3/2020 -5.09 +/- 14.4 1.87 +/- 6.15 9/1/2020 0.42 +/- 14.3 0.68 +/- 4.31 158 +/- 456 10/6/2020 5.99 +/- 12.7 1.39 +/- 6.41 11/3/2020 -16.2 +/- 13.6 -2.71 +/- 5.00 12/1/2020 0.51 +/- 13.8 -3.85 +/- 3.93 -31.9 +/- 577 A: < MDC 42
TABLE 3-10: GAMMA EMITTER CONCENTRATIONS IN SILT Surry Power Station, Surry County, Virginia - 2020 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 3/17/2020 34.4 +/- 68.7 88.2 +/- 66.9 A 14500 +/- 1840 1090 +/- 180 1250 +/- 207 9/22/2020 41.5 +/- 37.4 A 163 +/- 49.4 13900 +/- 1010 865 +/- 101 Ra-226 Be-7 Ac-228 3/17/2020 2460 +/- 1600 9/22/2020 2390 +/- 1110 2800 +/- 812 922 +/- 206 Cs-134 Cs-137 K-40 Th-228 Th-232 CHIC-C 3/17/2020 39.5 +/- 62.7 83.1 +/- 66.5 A 14900 +/- 1780 1040 +/- 174 970 +/- 242 9/23/2020 54.6 +/- 62.1 62.0 +/- 61.1 A 14000 +/- 2020 781 +/- 157 Ra-226 Ac-228 3/17/2020 2740 +/- 1560 1170 +/- 578 9/23/2020 1610 +/- 1610 973 +/- 315 Cs-134 Cs-137 K-40 Th-228 Th-232 SI 3/18/2020 64.7 +/- 59.2 A 116 +/- 66.8 A 16600 +/- 1950 911 +/- 163 9/23/2020 9.79 +/- 59.6 123 +/- 67.8 A 14000 +/- 1920 819 +/- 163 822 +/- 250 Ra-226 Be-7 Ac-228 3/18/2020 1180 +/- 301 9/23/2020 2590 +/- 1350 2440 +/- 960 1260 +/- 276 A: < MDC 43
TABLE 3-11: GAMMA EMITTER CONCENTRATIONS IN SHORELINE SEDIMENT Surry Power Station, Surry County, Virginia - 2020 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 2/4/2020 -6.37 +/- 23.9 -10.7 +/- 24.0 4760 +/- 848 431 +/- 420 A 136 +/- 66.2 8/3/2020 9.97 +/- 25.1 -7.90 +/- 22.8 4450 +/- 874 598 +/- 427 A 240 +/- 58.3 Th-232 8/3/2020 234 +/- 84.7 Cs-134 Cs-137 K-40 Ra-226 Th-228 CHIC-C 2/4/2020 -0.53 +/- 28.2 18.5 +/- 29.6 2860 +/- 738 141 +/- 76.0 8/3/2020 30.4 +/- 27.0 A -6.11 +/- 23.9 1370 +/- 511 1400 +/- 869 348 +/- 109 Th-232 Ac-228 139 +/- 135 A 8/3/2020 376 +/- 131 629 +/- 296 A: < MDC 44
TABLE 3-12: GAMMA EMITTER CONCENTRATION IN FISH Surry Power Station, Surry County, Virginia - 2020 pCi/kg (wet) +/- 2 Sigma Page 1 of 1 SAMPLING COLLECTION SAMPLE LOCATION DATE TYPE ISOTOPE K-40 Mn-54 Co-58 Fe-59 SD 4/6/2020 Catfish 1730 +/- 854 6.40 +/- 32.9 -8.33 +/- 38.3 94.7 +/- 82.8 A 4/6/2020 Game fish 1700 +/- 545 8.95 +/- 20.9 2.88 +/- 20.2 -26.8 +/- 45.7 10/6/2020 Catfish 1570 +/- 672 25.9 +/- 31.1 -27.6 +/- 43.1 31.2 +/- 58.8 10/6/2020 Game fish 1800 +/- 802 -5.13 +/- 34.4 9.95 +/- 32.6 27.1 +/- 69.6 Co-60 Zn-65 Cs-134 Cs-137 4/6/2020 Catfish 11.0 +/- 55.0 14.3 +/- 102 -3.27 +/- 40.6 6.31 +/- 42.4 4/6/2020 Game fish 3.46 +/- 22.9 -75.4 +/- 49.1 5.07 +/- 21.2 3.94 +/- 21.7 10/6/2020 Catfish 14.0 +/- 43.7 -23.9 +/- 83.3 3.12 +/- 32.2 17.5 +/- 36.4 10/6/2020 Game fish 8.19 +/- 31.0 -53.8 +/- 84.9 12.3 +/- 34.7 18.6 +/- 31.0 A: < MDC 45
TABLE 3-13: GAMMA EMITTER CONCENTRATIONS IN OYSTERS Surry Power Station, Surry County, Virginia - 2020 pCi/kg (wet) +/- 2 Sigma Page 1 of 1 SAMPLING COLLECTION LOCATIONS DATE ISOTOPE Mn-54 Co-58 Fe-59 Co-60 POS 3/19/2020 -9.79 +/- 44.8 4.08 +/- 57.1 -18.9 +/- 134 -20.1 +/- 45.9 9/24/2020 13.1 +/- 42.7 -24.0 +/- 45.5 -18.4 +/- 125 4.37 +/- 48.4 Zn-65 Cs-134 Cs-137
-61.9 +/- 102 -6.52 +/- 48.8 14.9 +/- 45.9
-46.5 +/- 106 13.3 +/- 40.5 -0.41 +/- 44.4 Mn-54 Co-58 Fe-59 Co-60 MP 3/19/2020 -13.0 +/- 36.3 26.8 +/- 37.8 34.6 +/- 77.3 -18.1 +/- 26.4 9/23/2020 21.7 +/- 33.8 20.0 +/- 44.9 49.0 +/- 91.2 -0.58 +/- 37.9 Zn-65 Cs-134 Cs-137
-18.5 +/- 87.3 25.1 +/- 36.2 -1.81 +/- 34.4
-49.0 +/- 63.5 38.2 +/- 34.8 A -6.93 +/- 32.1 Mn-54 Co-58 Fe-59 Co-60 SHI 3/19/2020 -24.6 +/- 40.9 14.9 +/- 48.9 10.2 +/- 125 -27.5 +/- 37.3 9/24/2020 -21.6 +/- 33.2 -17.2 +/- 32.0 -4.73 +/- 72.6 4.18 +/- 39.2 Zn-65 Cs-134 Cs-137
-127 +/- 103 -9.58 +/- 40.3 31.9 +/- 44.1 17.8 +/- 82.4 -1.75 +/- 34.9 -6.92 +/- 35.4 A: <MDC 46
TABLE 3-14: GAMMA EMITTER CONCENTRATIONS IN CLAMS Surry Power Station, Surry County, Virginia - 2020 pCi/kg (wet) +/- 2 Sigma Page 1 of 1 SAMPLING COLLECTION LOCATIONS DATE ISOTOPE Mn-54 Co-58 Fe-59 Co-60 JI 3/18/2020 12.3 +/- 34.9 -33.0 +/- 44.8 -101 +/- 112 -6.46 +/- 33.2 9/23/2020 21.3 +/- 30.8 -18.1 +/- 34.8 -57.4 +/- 87.8 4.27 +/- 30.5 Zn-65 Cs-134 Cs-137 3/18/2020 -47.4 +/- 79.8 3.61 +/- 32.3 16.1 +/- 33.1 9/23/2020 -35.1 +/- 75.6 -9.52 +/- 22.6 2.09 +/- 30.5 Mn-54 Co-58 Fe-59 Co-60 SD 3/17/2020 -14.2 +/- 46.5 -17.3 +/- 52.1 156 +/- 120 A -11.6 +/- 41.0 9/22/2020 14.5 +/- 40.4 -28.1 +/- 50.4 -116 +/- 102.0 3.67 +/- 40.7 Zn-65 Cs-134 Cs-137 3/17/2020 -55.6 +/- 98.5 20.4 +/- 47.1 -2.64 +/- 40.6 9/22/2020 -25.8 +/- 88.3 29.5 +/- 37.8 10.1 +/- 39.9 Mn-54 Co-58 Fe-59 Co-60 CHIC-C 3/17/2020 -9.77 +/- 35.1 -0.56 +/- 43.7 65.0 +/- 106 -9.84 +/- 37.0 9/23/2020 14.0 +/- 27.6 -4.91 +/- 35.6 13.9 +/- 74.3 3.43 +/- 27.1 Zn-65 Cs-134 Cs-137 3/17/2020 -93.9 +/- 103.0 -7.92 +/- 32.3 26.5 +/- 35.9 9/23/2020 -25.8 +/- 85.2 -6.47 +/- 32.5 -11.5 +/- 30.4 A: < MDC 47
TABLE 3-15: GAMMA EMITTER CONCENTRATIONS IN CRABS Surry Power Station, Surry County, Virginia - 2020 pCi/kg (wet) +/- 2 Sigma Page 1 of 1 SAMPLING COLLECTION LOCATIONS DATE ISOTOPE K-40 Mn-54 Co-58 Fe-59 SD 6/24/2020 1850 +/- 519 12.1 +/- 22.3 -5.90 +/- 20.2 21.7 +/- 49.6 Co-60 Zn-65 Cs-134 Cs-137 6/24/2020 6.08 +/- 21.0 -33.5 +/- 51.5 -25.0 +/- 25.0 -8.96 +/- 21.9 48
- 4. DISCUSSION OF RESULTS Data from the radiological analyses of environmental media collected during 2020 and tabulated in Section 3, are discussed below. The procedures and specifications followed in the laboratory for these analyses are as required in the Teledyne Brown Engineering quality assurance manuals and laboratory procedures. In addition to internal quality control 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 2020 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, actinium-228, thorium-228, thorium-232 and potassium-40, were detected in numerous samples. The following is a discussion and summary of the results of the environmental measurements taken during the 2020 reporting period. 49
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 each sampling location. TLDs are placed in two concentric rings around the station. The inner ring is 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, fallout from nuclear weapons testing, station effluents and direct radiation from 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 2020. The results of the TLD analyses shown in Table 3-2 comply with Section 7 of ANSI/HPS N13.37-2014 to ensure accurate environmental results. The long-term integrity of each field monitoring location is accomplished by a thorough, documented evaluation of the location for changes that could 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 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. Refer to Figures 4.1 and 4.2 for details. Data presented in these figures indicate that any contribution from station related activities is not 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 except for the Chernobyl accident in 1986, airborne gross beta results have remained steady. 50
Figure 4-1: 2020 GROSS BETA IN AIR PARTICULATES 0.045 0.040 0.035 0.030 0.025 pCi/m3 0.020 0.015 0.010 0.005 0.000 1/01 1/15 1/29 2/12 2/26 3/11 3/25 4/08 4/22 5/06 5/20 6/03 6/17 7/01 7/15 7/29 8/12 8/26 9/09 9/23 10/07 10/21 11/04 11/18 12/02 12/16 12/30 I -+- Avg Indicator Ave Control Figure 4-2: GROSS BETA IN AIR PARTICULATES 10 YEAR HISTORICAL TREND 1.0E+00 1.0E-01 pCi/m3 1.0E-02 1.0E-03 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 Avg Indicator
- Avg Control Avg-Pre Op Required LLD 51
4.3 Airborne Radioiodine Air is also continuously sampled for radioiodine by passing air through charcoal cartridges. Once a week, the charcoal cartridge samples are collected and analyzed. The results of the 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 2020. 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 beryllium-7, which is produced by cosmic processes. No man-made radionuclides were identified. These analyses confirm there are no effects from station effluents. 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 significant human consumption of milk, results in this pathway often being the most critical as it relates to station radiological effluents. This pathway also shows measurable amounts of nuclear weapons testing fallout. Therefore, this media needs to be carefully evaluated when determining the effects from station effluents. Results of gamma spectroscopy indicate no detectable station related radioactivity was identified in milk samples in 2020. 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. In 2020, cesium-137 was not detected at a level above the LLD. 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 all four composite samples, with an average concentration of 1.68 pCi/L. Strontium-90 is not a component of station radiological effluents and is a product of nuclear weapons testing fallout. 52
4.6 Food Products Three food product samples (corn, peanuts, and soybeans) were collected and analyzed by gamma spectroscopy. The results of the analyses are presented in Table 3-7. 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. Well water samples are analyzed for gamma radiation and tritium. The results of these analyses are presented in Table 3-8. No positive tritium or station related radioactivity was detected in 2020. Historically, during the pre-operational period, no gamma emitting isotopes were detected. 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 in this pathway. Only naturally occurring potassium-40 was detected. No station related radioactivity was detected. 53
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 2017 to provide data for future station intake dredging operations. The results of the gamma spectroscopy analyses are presented in Table 3-10. Naturally occurring beryllium-7, potassium-40, radium-226, actinium-228, thorium-228, and thorium-232 were detected. Historically, cobalt-60 has been detected in samples obtained from the station discharge indicator location. Cobalt-60 has not been detected since 2003. A trend of cesium-137 and cobalt-60 concentrations is graphed and presented in Figures 4-4 and 4-5. For three decades, the general concentration for cesium-137 has continued to decrease. This trend is the calculated average of the semi-annual analysis results. An increase in cesium-137 concentration was observed in the Station Discharge indicator samples in 2018 and 2019. In 2019, the concentration of cesium-137 was reduced in the stations liquid waste effluent. The trend in the Station Discharge silt concentration decreased in 2020. This decreasing trend was expected to trail behind the reduced concentration in liquid waste effluent. The cesium-137 concentration for the control location and both indicator locations all show a decreasing trend in 2020. The Station Intake indicator sample was added to the REMP in 2017. The additional sample is collected in the dredge channel area at the station intake. The dredge channel is approximately 150 wide and 1750 in length. This location was added to support future station intake channel dredging operations. The trend for the station intake is currently being established and carefully monitored. The presence of cesium-137 in indicator location, Station Intake, and control location, Chick is indicative of the accumulation, through runoff, of cesium-137 into the James River from residual weapons testing fallout. Samples collected from the James River, during the pre-operational period, indicated the presence of cesium-137. The pre-operational average cesium-137 concentration is indicated in Figure 4-5. The highest silt indicator location in 2020 is the Station Discharge with a cesium-137 concentration of 163 pCi/kg. This concentration remains consistent with aquatic sediment samples collected in control locations of the James River. 54
Figure 4-4: COBALT-60 IN SILT 1.0E+04 1.0E+03 pCi/kg dry 1.0E+02 1.0E+01 Note: Station Intake added to REMP, 3rd Qtr. 2017 1.0E+00 1972 1974 1976 1978 1980 1982 1984 1986 1988 1990 1992 1994 1996 1998 2000 2002 2004 2006 2008 2010 2012 2014 2016 2018 2020 1- Control - Chickahominy Chickahominy had detectable activity in 1982 and 1984 through 1994. Other years were <MDC, Minimum Station Discharge LLD Avg Detectable Concentration. Station Discharge was <MDC activity 1996 through 1998 and 2004 through 2020.
- Station Intake Figure 4-5:
CESIUM-137 IN SILT 1.0E+04 pCi/kg dry 1.0E+03 1.0E+02 1972 1974 1976 1978 1980 1982 1984 1986 1988 1990 1992 1994 1996 1998 2000 2002 2004 2006 2008 2010 2012 2014 2016 2018 2020 1- Control - Chickahominy Station Discharge Station Intake
- Ave-Pre Op
- Required LLD 55
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, actinium-228, thorium-228, and thorium-232 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. The 2020 results are similar to those seen over the last decade. No activity was observed in this media except for naturally occurring potassium-40. 4.12 Oysters Oysters were collected from three different locations. The results of the oyster analyses are presented in Table 3-13. No gamma emitting radionuclides were detected in oysters sampled in 2020. 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. No gamma emitting radionuclides related to station effluents were detected in clams sampled in 2020. 4.14 Crabs An annual crab sample was collected from the Station Discharge Canal and analyzed by gamma spectroscopy. The results of the analysis are presented in Table 3-15. Other than naturally occurring potassium-40, no other gamma emitting radionuclides related to station effluents were detected in crabs sampled in 2020. This is consistent with pre-operational data and data collected over the past decade. 56
- 5. PROGRAM EXCEPTIONS There were four exceptions to the REMP sampling schedule in 2020.
The four exceptions are detailed below:
- 1. Milk from the Beachy Farm control location was seasonally unavailable during the months of January and February of 2020. During these two months the dairy farmer experienced a reduction in milking animals, the animals diet was reduced, and the birth and nursing of a new calve resulted in limited milk being available for human consumption. Milk collection from Beachy Farm resumed in March 2020.
- 2. The Bacons Castle (BC) air sample particulate filter was invalid for the collection period 3/31/2020 - 4/7/2020. A visual inspection of the particulate filter identified very little particulate material was deposited on the patch. Teledyne Brown Engineering (TBE) validated through analysis that the particulate sample was invalid. TBE removed the sample from the quarterly composite group.
- 3. One of the three James River Bridge (JRB) TLDs (#39) was missing when preparing the environmental TLDs for shipment to the vendor for processing. The remaining two TLDs were shipped to the vendor and processed.
- 4. The Colonial Parkway (CP) milk sample from October 2020 was not found at the vendor lab when creating the 4th quarter Sr-89/90 composite. The composite is composed of November and December samples only.
The one exception to the Interlaboratory Comparison Program (ICP) for 2020 is listed below.
- 1. Vendor did not perform Interlaboratory Comparison Program analyses within frequency as required by VPAP-2103S (semi-annually) for Milk (I-131, Gamma, and Sr89/90) and Air Particulate (Gamma and Sr-89/90). The vendor (TBE) did not complete the first set of analyses for 2020 until September due to unforeseen circumstances between TBEs home business office and Analytics. The ICP analysis was performed again in December.
57
- 6. CONCLUSIONS The results of the 2020 Radiological Environmental Monitoring Program for Surry 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 Surry Power Station in 2020. Note: The units for the Direct Radiation Exposure Pathway as presented in Table 3-1 are now recorded in units of mRem/Standard Quarter to match units in the Gamma Exposure Rate recorded in Table 3-2. 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. 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-six 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 four samples at an average concentration of 1.68 pCi/L. Strontium-90 is not a component of station effluents, but rather, a product of nuclear weapons testing fallout. Food Products - Only 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 2020. Well Water - Well water samples were analyzed for gamma emitting radionuclides and tritium. Well water sample analyses indicate no radioactivity was attributable to the operation of the station. River Water - River water samples were analyzed for gamma emitting radionuclides and tritium. Only naturally occurring potassium-40 was detected. No positive tritium activity was detected. 58
Silt - No radioactivity attributable to the operation of the station was detected in the control location. Only naturally occurring potassium-40, radium-226, thouium-228, thorium-232, and actinium-228 were detected. The indicator sample with the highest concentration of cesium-137 during 2020 is the station discharge sample, with a concentration of 163 pCi/kg. This concentration is consistent with aquatic sediment samples collected in control locations of the James River. Naturally occurring potassium-40, radium-226, thouium-228, thorium-232, and actinium-228 were also detected. Shoreline Sediment - There were no radionuclides attributable to the operation of Surry Power Station identified in any sample. Naturally occurring radionuclides were detected at concentrations equivalent to normal background activities. Aquatic Biota Fish - Only naturally occurring potassium-40 was detected. There were no other positive gamma emitting radionuclides detected in any of the fish samples. Oysters - No positive gamma emitting radionuclides were detected in any of the oyster samples. Clams - No positive gamma emitting radionuclides were detected in any of the clam samples. Crabs - Other than naturally occurring potassium-40, there were no other positive gamma emitting radionuclides detected in any of the clam samples. 59
REFERENCES 60
References
- 1. NUREG-0472, "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 for 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 Measurements, September 1984.
- 9. NCRP Report No. 160, Ionizing Radiation Exposure of the Population of the United States, March 2009.
- 10. Position paper on Implementation of ANSI/HPS N13.37-2014 Environmental Dosimetry Criteria at Surry Power Station, November 2016 by John M. Sukosky, CHP.
61
APPENDICES 62
APPENDIX A: LAND USE CENSUS Year 2020 63
LAND USE CENSUS* Surry Power Station, Surry County, Virginia January 1 - December 31, 2020 Page 1 of 1 Nearest Nearest Sector Direction Resident Garden ** Nearest Cow Nearest 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 1.2 @ 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.
- Area greater than 50 m2 and contains broadleaf vegetation.
(a) None 64
APPENDIX B:
SUMMARY
OF INTERLABORATORY COMPARISONS Year 2020 65
INTRODUCTION The TBE Laboratory analyzed Performance Evaluation (PE) samples of air particulate (AP), air iodine, milk, soil, vegetation, and water matrices for various analytes. The PE samples supplied by Analytics Inc., Environmental Resource Associates (ERA) and Department of Energy (DOE) Mixed Analyte Performance Evaluation Program (MAPEP), were evaluated against the following pre-set acceptance criteria: A. Analytics Evaluation Criteria Analytics evaluation report provides a ratio of TBEs result and Analytics known value. Since flag values are not assigned by Analytics, TBE evaluates the reported ratios based on internal QC requirements based on the DOE MAPEP criteria. B. ERA Evaluation Criteria ERAs evaluation report provides an acceptance range for control and warning limits with associated flag values. ERAs acceptance limits are established per the US EPA, National Environmental Laboratory Accreditation Conference (NELAC), state-specific Performance Testing (PT) program requirements or ERAs SOP for the Generation of Performance Acceptance Limits, as applicable. The acceptance limits are either determined by a regression equation specific to each analyte or a fixed percentage limit promulgated under the appropriate regulatory document. C. DOE Evaluation Criteria MAPEPs evaluation report provides an acceptance range with associated flag values. MAPEP defines three levels of performance:
- Acceptable (flag = A) - result within +/- 20% of the reference value
- Acceptable with Warning (flag = W) - result falls in the +/- 20% to +/-
30% of the reference value
- Not Acceptable (flag = N) - bias is greater than 30% of the reference value Note: The Department of Energy (DOE) Mixed Analyte Performance Evaluation Program (MAPEP) samples are created to mimic conditions found at DOE sites which do not resemble typical environmental samples obtained at commercial nuclear power facilities.
66
RESULTS For the TBE laboratory, 126 out of 133 analyses performed met the specified acceptance criteria. Seven analyses did not meet the specified acceptance criteria for the following reasons and were addressed through the TBE Corrective Action Program. A summary is found below:
- 1. The MAPEP February 2020 AP U-233/234 and U-238 results were evaluated as Not Acceptable. The reported value for U-233/234 was 0.0416 +/- 0.0102 Bq/sample and the known result was 0.075 Bq/sample (acceptance range 0.053 - 0.098). The reported value for U-238 was 0.0388 +/- 0.00991 Bq/sample and the known result was 0.078 Bq/sample (acceptance range 0.055 - 0.101). This sample was run as the workgroup duplicate and had RPDs of 10.4% (U-234) and 11.7%
(U-238). After the known results were obtained, the sample was relogged. The filter was completely digested with tracer added originally; the R1 results were almost identical. It was concluded that the recorded tracer amount was actually double, causing the results to be skewed. Lab worksheets have been modified to verify actual tracer amount vs. LIMS data. TBE changed vendors for this cross-check to ERA MRAD during the 2nd half of 2020. Results were acceptable at 97.8% for U-234 and 106% for U-238. (NCR 20-13)
- 2. The Analytics September 2020 milk Sr-89 result was evaluated as Not Acceptable. The reported value was 62.8 pCi/L and the known result was 95.4 (66%). All QC data was reviewed and there were no anomalies. This was the first failure for milk Sr-89 since 2013 and there have only been 3 upper/lower boundary warnings since that time.
It is believed that there may have been some Sr-89 loss during sample prep. The December 2020 result was at 92% of the known. (NCR 20-19)
- 3. The ERA October 2020 water I-131 result was evaluated as Not Acceptable. The reported value was 22.9 pCi/L and the known result was 28.2 (acceptance range 23.5 - 33.1). The reported result was 81%
of the known, which passes TBE QC criteria. This was the first failure for water I-131. (NCR 20-17) 67
- 4. The ERA October 2020 water Gross Alpha and Gross Beta results were evaluated as Not Acceptable. The reported/acceptable values and ranges are as follows: Reported Known Range Gross Alpha 40.0 26.2 13.3 - 34.7 Gross Beta 47.5 69.1 48.0 - 76.0 All QC data was reviewed with no anomalies and a cause for failure could not be determined. This was the first failure for water Gross Beta. A Quick Response follow-up cross-check was analyzed as soon as possible with acceptable results at 96.8% for Gross Alpha and 102%
for Gross Beta. (NCR 20-18)
- 5. The MAPEP August 2020 soil Ni-63 result was evaluated as Not Acceptable. The reported value was 438 +/- 21.1 Bq/kg and the known result was 980 Bq/kg (acceptance range 686 - 1274). It is believed that some Ni-63 loss occurred during the sample prep step. (NCR 20-20)
The Inter-Laboratory Comparison Program provides evidence of in control counting systems and methods, and that the laboratories are producing accurate and reliable data. 68
A.1 Analytics Environmental Radioactivity Cross Check Program Teledyne Brown Engineering Environmental Services Identification Known Ratio of TBE to Month/Year Matrix Nuclide Units TBE Value Evaluation (b) Number Value (a) Known Result September 2020 E13247 Milk Sr-89 pCi/L 62.8 95.4 0.66 N(1) Sr-90 pCi/L 12.0 12.8 0.94 A E13248 Milk Ce-141 pCi/L 156 150 1.04 A Co-58 pCi/L 172 180 0.96 A Co-60 pCi/L 369 379 0.97 A Cr-51 pCi/L 372 372 1.00 A Cs-134 pCi/L 171 200 0.85 A Cs-137 pCi/L 241 250 0.96 A Fe-59 pCi/L 217 200 1.08 A I-131 pCi/L 84.6 95.0 0.89 A Mn-54 pCi/L 175 180 0.97 A Zn-65 pCi/L 252 270 0.93 A E13249 Charcoal I-131 pCi 70.2 75.8 0.93 A E13250 AP Ce-141 pCi 101 101 1.00 A Co-58 pCi 111 120 0.92 A Co-60 pCi 249 254 0.98 A Cr-51 pCi 287 249 1.15 A Cs-134 pCi 114 134 0.85 A Cs-137 pCi 159 168 0.95 A Fe-59 pCi 127 134 0.95 A Mn-54 pCi 114 121 0.94 A Zn-65 pCi 168 181 0.93 A E13251 Soil Ce-141 pCi/g 0.241 0.191 1.26 W Co-58 pCi/g 0.211 0.228 0.93 A Co-60 pCi/g 0.466 0.481 0.97 A Cr-51 pCi/g 0.450 0.472 0.95 A Cs-134 pCi/g 0.273 0.254 1.07 A Cs-137 pCi/g 0.370 0.390 0.95 A Fe-59 pCi/g 0.233 0.254 0.92 A Mn-54 pCi/g 0.217 0.229 0.95 A Zn-65 pCi/g 0.368 0.343 1.07 A E13252 AP Sr-89 pCi 79.9 100.0 0.80 A Sr-90 pCi 12.1 13.4 0.90 A (a) The Analytics known value is equal to 100% of the parameter present in the standard as determined by gravimetric and/or volumetric measurements made during standard preparation (b) Analytics evaluation based on TBE internal QC limits: A = Acceptable - reported result falls within ratio limits of 0.80-1.20 W = Acceptable with warning - reported result falls within 0.70-0.80 or 1.20-1.30 N = Not Acceptable - reported result falls outside the ratio limits of < 0.70 and > 1.30 (1) See NCR 20-19 69
A.1 Analytics Environmental Radioactivity Cross Check Program Teledyne Brown Engineering Environmental Services Identification Known Ratio of TBE to Month/Year Matrix Nuclide Units TBE Value Evaluation (b) Number Value (a) Known Result December 2020 E13254 Milk Sr-89 pCi/L 82.2 89.7 0.92 A Sr-90 pCi/L 12.4 13.0 0.96 A E13255 Milk Ce-141 pCi/L 91.1 100 0.91 A Co-58 pCi/L 77.5 84.3 0.92 A Co-60 pCi/L 147 152 0.97 A Cr-51 pCi/L 259 253 1.02 A Cs-134 pCi/L 97.1 108 0.90 A Cs-137 pCi/L 117 127 0.92 A Fe-59 pCi/L 114 112 1.02 A I-131 pCi/L 84.3 91.9 0.92 A Mn-54 pCi/L 137 143 0.96 A Zn-65 pCi/L 175 190 0.92 A E13256 Charcoal I-131 pCi 70.2 78.2 0.90 A E13257A AP Ce-141 pCi 67.4 74.6 0.90 A Co-58 pCi 57.9 62.9 0.92 A Co-60 pCi 108 113 0.95 A Cr-51 pCi 162 189 0.86 A Cs-134 pCi 68.1 80.4 0.85 A Cs-137 pCi 82.4 95.0 0.87 A Fe-59 pCi 80.5 83.7 0.96 A Mn-54 pCi 102 107 0.95 A Zn-65 pCi 115 142 0.81 A E13258 Soil Ce-141 pCi/g 0.167 0.170 0.98 A Co-58 pCi/g 0.125 0.143 0.87 A Co-60 pCi/g 0.245 0.257 0.95 A Cr-51 pCi/g 0.393 0.429 0.92 A Cs-134 pCi/g 0.147 0.183 0.80 A Cs-137 pCi/g 0.260 0.288 0.90 A Fe-59 pCi/g 0.199 0.190 1.05 A Mn-54 pCi/g 0.229 0.243 0.94 A Zn-65 pCi/g 0.320 0.322 0.99 A E13259 AP Sr-89 pCi 85.0 78.6 1.08 A Sr-90 pCi 13.1 11.4 1.15 A (a) The Analytics known value is equal to 100% of the parameter present in the standard as determined by gravimetric and/or volumetric measurements made during standard preparation (b) Analytics evaluation based on TBE internal QC limits: A = Acceptable - reported result falls within ratio limits of 0.80-1.20 W = Acceptable with warning - reported result falls within 0.70-0.80 or 1.20-1.30 N = Not Acceptable - reported result falls outside the ratio limits of < 0.70 and > 1.30 70
A.2 DOE's Mixed Analyte Performance Evaluation Program (MAPEP) Teledyne Brown Engineering Environmental Services Identification TBE Known Acceptance Month/Year Matrix Nuclide Units Evaluation (b) Number Value Value (a) Range February 2020 20-GrF42 AP Gross Alpha Bq/sample 0.676 1.24 0.37 - 2.11 A Gross Beta Bq/sample 2.03 2.00 1.00 - 3.00 A 20-MaS42 Soil Ni-63 Bq/kg 0.01 (1) A Sr-90 Bq/kg 348 340 238 - 442 A 20-MaW42 Water Ni-63 Bq/L 11.6 11.1 7.8 - 14.4 A Pu-238 Bq/L 0.926 0.94 0.66 - 1.22 A Pu-239/240 Bq/L 0.712 0.737 0.516 - 0.958 A 20-RdF42 AP U-234/233 Bq/sample 0.0416 0.075 0.053 - 0.098 N(3) U-238 Bq/sample 0.0388 0.078 0.055 - 0.101 N(3) 20-RdV42 Vegetation Cs-134 Bq/sample 3.23 3.82 2.67 - 4.97 A Cs-137 Bq/sample 2.64 2.77 1.94 - 3.60 A Co-57 Bq/sample 0.0281 (1) A Co-60 Bq/sample 2.62 2.79 1.95 - 3.63 A Mn-54 Bq/sample 4.3 4.58 3.21 - 5.95 A Sr-90 Bq/sample 0.396 0.492 0.344 - 0.640 A Zn-65 Bq/sample 3.93 3.79 2.65 - 4.93 A August 2020 20-GrF43 AP Gross Alpha Bq/sample 0.267 0.528 0.158 - 0.989 A Gross Beta Bq/sample 0.939 0.915 0.458 - 1.373 A 20-MaS43 Soil Ni-63 Bq/kg 438 980 686 - 1274 N(4) Tc-99 Bq/kg 1.11 (1) A 20-MaW43 Water Ni-63 Bq/L 0.175 (1) A Tc-99 Bq/L 8.8 9.4 6.6 - 12.2 A 20-RdV43 Vegetation Cs-134 Bq/sample 3.635 4.94 3.46 - 6.42 W Cs-137 Bq/sample 0.0341 (1) A Co-57 Bq/sample 5.855 6.67 4.67 - 8.67 W Co-60 Bq/sample 3.122 4.13 2.89 - 5.37 W Mn-54 Bq/sample 4.524 5.84 4.09 - 7.59 A Sr-90 Bq/sample 1.01 1.39 0.97 - 1.81 W Zn-65 Bq/sample 4.706 6.38 4.47 - 8.29 W (a) The MAPEP known value is equal to 100% of the parameter present in the standard as determined by gravimetric and/or volumetric measurements made during standard preparation (b) DOE/MAPEP evaluation: A = Acceptable - reported result falls within ratio limits of 0.80-1.20 W = Acceptable with warning - reported result falls within 0.70-0.80 or 1.20-1.30 N = Not Acceptable - reported result falls outside the ratio limits of < 0.70 and > 1.30 (1) False positive test (2) Sensitivity evaluation (3) See NCR 20-13 (4) See NCR 20-20 71
A.3 ERA Environmental Radioactivity Cross Check Program Teledyne Brown Engineering Environmental Services Identification Known Acceptance Month/Year Matrix Nuclide Units TBE Value Evaluation (b) Number Value (a) Limits March 2020 MRAD-32 Water Am-241 pCi/L 52.5 45.3 31.1 - 57.9 A Fe-55 pCi/L 155 152 89.3 - 221 A Pu-238 pCi/L 34.0 36.4 21.9 - 47.2 A Pu-239 pCi/L 30.9 33.6 20.8 - 41.4 A April 2020 RAD-121 Water Ba-133 pCi/L 41.8 41.8 34.0- 46.7 A Cs-134 pCi/L 42.9 46.3 37.1 - 50.9 A Cs-137 pCi/L 226 234 211 - 259 A Co-60 pCi/L 52.4 50.3 45.3 - 57.9 A Zn-65 pCi/L 83.3 86.8 78.1 - 104 A GR-A pCi/L 20.1 23.6 11.9 - 31.6 A GR-B pCi/L 45.6 60.5 41.7 - 67.2 A U-Nat pCi/L 18.45 18.6 14.9 - 20.9 A H-3 pCi/L 14200 14100 12300 - 15500 A Sr-89 pCi/L 58.0 60.1 48.3 - 67.9 A Sr-90 pCi/L 34.1 44.7 33.0 - 51.2 A I-131 pCi/L 27.4 28.9 24.1 - 33.8 A September 2020 MRAD-33 Soil Sr-90 pCi/Kg 4360 4980 1550 - 7760 A AP Fe-55 pCi/Filter 189 407 149 - 649 A U-234 pCi/Filter 17.9 18.3 13.6 - 21.4 A U-238 pCi/Filter 19.1 18.1 13.7 - 21.6 A Water Am-241 pCi/L 160 176 121 - 225 A Fe-55 pCi/L 299 298 175 - 433 A Pu-238 pCi/L 200 191 115 - 247 A Pu-239 pCi/L 105 100 61.9 - 123 A October 2020 RAD-123 Water Ba-133 pCi/L 37.1 37.0 29.8 - 41.6 A Cs-134 pCi/L 50.6 52.7 42.5 - 58.0 A Cs-137 pCi/L 131 131 118 - 146 A Co-60 pCi/L 62.9 60.5 54.4 - 69.1 A Zn-65 pCi/L 167 162 146 - 191 A GR-A pCi/L 40.0 26.2 13.3 - 34.7 N(1) GR-B pCi/L 47.5 69.1 48.0 - 76.0 N(1) U-Nat pCi/L 17.2 20.3 16.3 - 22.7 A H-3 pCi/L 23800 23200 20,300 - 25,500 A Sr-89 pCi/L 41.1 43.3 33.4 - 50.5 A Sr-90 pCi/L 28.5 30.2 22.0 - 35.0 A I-131 pCi/L 22.9 28.2 23.5 - 33.1 N(2) November 2020 QR111920K Water GR-A pCi/L 50.7 52.4 27.3 - 65.6 A GR-B pCi/L 24.9 24.3 15.0 - 32.3 A (a) The ERA known value is equal to 100% of the parameter present in the standard as determined by gravimetric and/or volumetric measurements made during standard preparation. (b) ERA evaluation: A = Acceptable - Reported value falls within the Acceptance Limits N = Not Acceptable - Reported value falls outside of the Acceptance Limits (1) See NCR 20-18 (2) See NCR 20-17 72}}