ML25119A073
| ML25119A073 | |
| Person / Time | |
|---|---|
| Site: | Surry, 07200002, 07200055  |
| Issue date: | 04/29/2025 |
| From: | Terry W Virginia Electric & Power Co (VEPCO) |
| To: | Office of Nuclear Material Safety and Safeguards, Office of Nuclear Reactor Regulation, Document Control Desk |
| References | |
| 25-130 | |
| Download: ML25119A073 (1) | |
Text
VIRGINIA E LECTRI. AND POWER CoMJ>ANY RICHMOND, V.11\\CINJA 23261 United States Nuclear Regulatory Commission Attention: Document Control Desk Washington, DC 20555-0001 VIRGINIA ELECTRIC AND POWER COMPANY SURRY POWER STATION UNITS 1 AND 2 Serial No.
S&L/SJB Docket Nos.
License Nos.
2024 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERA TING REPORT 25-130 RO 50-280 50-281 72-2 72-55 DPR-32 DPR-37 SNM-2501 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, 2024 through December 31, 2024, which includes environmental monitoring for the Surry ISFSI and both units.
If you have any further questions, please contact Selma Spratley at 757-365-2551.
Sincerely, t::<1:u-Director Safety & Licensing (Acting)
Surry Power Station Attachment Commitments made in this letter: None 29 April, 2025
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.25-130 Docket Nos.: 50-280 50-281 72-2 72-55
ATTACHMENT 1 Serial No.25-130 Docket Nos.: 50-280 50-281 72-2 72-55 2024 Annual Radiological Environmental Operating Report SURRY POWER STATION UNITS 1 AND 2 VIRGINIA ELECTRIC AND POWER COMPANY
2024 Annual Radiological Environmental Operating Report Surry Power Station
Dominion Energy Surry Power Station Radiological Environmental Monitoring Program January 1, 2024 to December 31, 2024
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 2024 REMP Samples........................................................... 27 4.
DISCUSSION OF RESULTS....................................................................................... 47 4.1 Gamma Exposure Rate......................................................................................... 48 4.2 Airborne Gross Beta.............................................................................................. 48 4.3 Airborne Radioiodine............................................................................................. 50 4.4 Air Particulate Gamma.......................................................................................... 50 4.5 Animal Milk............................................................................................................ 50 4.6 Food Products....................................................................................................... 51 4.7 Well Water............................................................................................................. 51 4.8 River Water........................................................................................................... 51 4.9 Silt......................................................................................................................... 52 4.10 Shoreline Sediment............................................................................................. 54 4.11 Fish..................................................................................................................... 54 4.12 Oysters................................................................................................................ 54 4.13 Clams.................................................................................................................. 54 4.14 Crabs.................................................................................................................. 54
- 5. PROGRAM EXCEPTIONS............................................................................................. 55
- 6. CONCLUSIONS............................................................................................................. 56 REFERENCES.................................................................................................................... 58 APPENDICES..................................................................................................................... 60 APPENDIX A: LAND USE CENSUS.............................................................................. 61 APPENDIX B:
SUMMARY
OF INTERLABORATORY COMPARISONS........................ 63 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 2024 Surry Power Station Radiological Environmental Monitoring Program (REMP). Radioactivity levels from January 1 through December 31, 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.
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.
During 2024, 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 2024 was 0.030 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.
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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 2024 airborne results were comparable to previous years. No station related radioactivity was detected.
Natural radioactivity levels remain consistent with historical values. 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 and silt samples. 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 potassium-40, thorium-228, and thorium-232 were detected at average environmental levels. The terrestrial exposure pathway includes milk and food products. Iodine-131was not detected in any 2024 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. Only naturally occurring potassium-40 was detected. Environmental radiation dose is measured in the direct exposure pathway using TLDs. The TLD results are reported in accordance with ANSI/HPS N13.37-2014 methodology. These results have remained relatively constant over the years.
No annual facility related dose is attributable to station operations.
During 2024, 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 2024 was 0.030 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 2024 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. Radiation Detection Company 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.
Annual Radiological Environmental Operating Report 2024 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 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 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 2024 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 Radiation Detection Company for Surry Power Station. All samples, except for the environmental TLDs, are shipped to Teledyne Brown Engineering, located in Knoxville, TN, for analysis. The environmental TLDs are shipped to Radiation Detection Company, located in Georgetown, TX, 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.
Surry Nuclear Power Station Surry County, Virginia Annual Radiological Environmental Operating Report 2024 8
Table 2-1 SURRY - 2024 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 Environmental Control (00)
Quarterly Onsite (Stored in lead shield outside the protected area)
TLDs West North West (02) 0.2 WNW 293° Quarterly Site Boundary Surry Station Discharge (03) 0.4 NW 321° Quarterly Site Boundary North North West (04) 0.2 NNW 329° Quarterly Site Boundary North (05) 0.3 N
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 Surry Nuclear Power Station Surry County, Virginia Annual Radiological Environmental Operating Report 2024 9
Table 2-1 SURRY - 2023 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 Surry Nuclear Power Station Surry County, Virginia Annual Radiological Environmental Operating Report 2024 10
Table 2-1 SURRY - 2024 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 (CP) 3.7 NNW 336° Monthly (BF) 12.0 SW 220° Monthly Control Location Oysters (POS) 6.4 SSE 157° Semi-Annually (MP) 4.9 ESE 124° Semi-Annually (SHI) 6.8 SE 128° Semi-Annually Clams (CHIC) 11.2 WNW 300° Semi-Annually Control Location (SD) 1.3 NNW 341° Semi-Annually (JI) 3.9 NW 324° Semi-Annually Fish (SD) 1.3 NNW 341° Semi-Annually Crabs (SD) 1.3 NNW 341° Annually Crops (BROCK) 3.8 S
183° Annually (Corn, Peanuts, Colonial Parkway Beachy Farm Point of Shoals Mulberry Point Swash Hole Island Chickahominy River Surry Station Discharge Jamestown Island Surry Station Discharge Surry Station Discharge Brock's Farm Slade's Farm (SLADE) 3.2 S
179° Annually Soybeans) 11
Table 2-2 SURRY - 2024 SAMPLE ANALYSIS PROGRAM Pg. 1 of 3 SAMPLE MEDIA FREQUENCY ANALYSIS LLD*
REPORT UNITS Thermoluminescent Quarterly Gamma Dose 6
mR/Std.
Quarter Dosimetry (TLD)
Air Iodine Weekly I-131 0.07 pCi/m3 Air Particulate Weekly Gross Beta 0.01 pCi/m3 Quarterly (a)
Gamma 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 - 2024 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.
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Table 2-2 SURRY - 2024 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.
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06 07 N
N E
WNW NW NNW 16 18 08 05 04 03 02 10 11 12 14 15 13 Legend Figure 1. Surry Radiological Monitoring Locations Air Sampling Stations TLD Sampling State Environmental Monitoring Sites State TLD Sites Exclusion Area Boundary Graphics No. SV645F ENE 09 15
Graphics No. CB3308A Figure 2. Surry Emergency Plan Map Air Sampling Stations TLD Sampling Nearest Garden Nearest Milk Animal Aquatic Samples Original © 1991 by ADC of Alexandria, Inc., 6440 General Green Way, Alexandria, VA 22312. USED WITH PERMISSION. No other reproduction may be made without the written permission of ADC.
Nearest Residents 31 NNE NE ENE N
E 29 32 33 34 35 36 19 16
SSE S
Figure 3. Surry Emergency Plan Map Air Sampling Stations TLD Sampling Nearest Garden Nearest Milk Animal Aquatic Samples Original © 1991 by ADC of Alexandria, Inc., 6440 General Green Way, Alexandria, VA 22312. USED WITH PERMISSION. No other reproduction may be made without the written permission of ADC.
Nearest Residents 37 SE ESE E
42 43 Graphics No. CB3309A 17
SSW S
Figure 4. Surry Emergency Plan Map Air Sampling Stations TLD Sampling Nearest Garden Nearest Milk Animal Crop Samples Original © 1991 by ADC of Alexandria, Inc., 6440 General Green Way, Alexandria, VA 22312. USED WITH PERMISSION. No other reproduction may be made without the written permission of ADC.
Nearest Residents 20 SW WSW W
21 22 24 23 Graphics No. CB3310A 18
W Figure 5. Surry Emergency Plan Map Air Sampling Stations TLD Sampling Nearest Garden Nearest Milk Animal Aquatic Samples Original © 1991 by ADC of Alexandria, Inc., 6440 General Green Way, Alexandria, VA 22312. USED WITH PERMISSION. No other reproduction may be made without the written permission of ADC.
Nearest Residents 26 27 25 28 WNW NNW NW N
30 Graphics No. CB3307B 19
- 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
SurryNuclearPowerStation SurryCounty,Virginia AnnualRadiologicalEnvironmentalOperatingReport2024 Indicator Control Number of Medium or Analysis Total LLD Locations Locations Nonroutine Pathway Sampled Type Number Mean Distance Mean Mean Reported (Units)
(Range)
Number Direction (Range)
(Range)
Measurements Direct Gamma 164 2
0 Radiation Dose TLD (mR/Std. Month )
Air Particulate Gross 416 10 14.2 (363/364)
FE 4.9 mi.
15.5 (52/52) 14.8 (52/52) 0 (1e -3 pCi/m 3 )
Beta (3.53-29.3)
ESE (4.55-26.8)
(5.09-28.1)
GAMMA 32 Cs-134 32 50
<LLD N/A
<LLD
<LLD 0
Cs-137 32 60
<LLD N/A
<LLD
<LLD 0
Be-7 32 101 (28/28)
BASF 5.1 mi.
118 (4/4) 111 (4/4) 0 (67.3-152)
ENE (94.5-144)
(79.6-137)
<LLD N/A
<LLD
<LLD 0
(1e -3 pCi/m 3 )
Milk SR-89 4
5
<LLD N/A
<LLD NA 0
(pCi/Liter)
SR-90 4
1 1.78 (3/4)
CP 3.7 mi.
1.78 (3/4)
NA 0
(1.51-2.22)
NNW (1.51-2.22)
GAMMA 24 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
I-131 24 1
<LLD N/A
<LLD
<LLD 0
K-40 24 1298 (12/12)
CP 3.7 mi.
1298 (12/12) 1099 (12/12) 0 (1189-1402)
NNW (1189-1402)
(759-1409)
Location with Highest Mean TABLE 3-1: RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM
SUMMARY
SURRY NUCLEAR POWER STATION Docket No. 50-280-281 21
SurryNuclearPowerStation SurryCounty,Virginia AnnualRadiologicalEnvironmentalOperatingReport2024 Indicator Control Number of Medium or Analysis Total LLD Locations Locations Nonroutine Pathway Sampled Type Number Mean Distance Mean Mean Reported (Units)
(Range)
Number Direction (Range)
(Range)
Measurements Location with Highest Mean TABLE 3-1: RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM
SUMMARY
SURRY NUCLEAR POWER STATION Docket No. 50-280-281 Food Products GAMMA 3
(pCi/kg wet)
Cs-134 3
60
<LLD N/A
<LLD N/A 0
Cs-137 3
80
<LLD N/A
<LLD N/A 0
I-131 3
60
<LLD N/A
<LLD N/A 0
K-40 3
8790 (3/3)
SLADE 3.2 mi.
19060 (1/1)
NA 0
(1941-19060)
S (19060-19060)
Well Water H-3 12 2000
<LLD N/A
<LLD N/A 0
(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
Nb-95 12 15
<LLD N/A
<LLD N/A 0
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
22
SurryNuclearPowerStation SurryCounty,Virginia AnnualRadiologicalEnvironmentalOperatingReport2024 Indicator Control Number of Medium or Analysis Total LLD Locations Locations Nonroutine Pathway Sampled Type Number Mean Distance Mean Mean Reported (Units)
(Range)
Number Direction (Range)
(Range)
Measurements Location with Highest Mean TABLE 3-1: RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM
SUMMARY
SURRY NUCLEAR POWER STATION Docket No. 50-280-281 River Water H-3 8
2000
<LLD N/A
<LLD
<LLD 0
(pCi/Liter)
GAMMA 24 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
Nb-95 24 15
<LLD N/A
<LLD
<LLD 0
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
K-40 24 97.7 (5/12)
SD 0.4 mi.
97.7 (5/12)
<LLD 0
(78.0-117)
NW (78.0-117) 23
SurryNuclearPowerStation SurryCounty,Virginia AnnualRadiologicalEnvironmentalOperatingReport2024 Indicator Control Number of Medium or Analysis Total LLD Locations Locations Nonroutine Pathway Sampled Type Number Mean Distance Mean Mean Reported (Units)
(Range)
Number Direction (Range)
(Range)
Measurements Location with Highest Mean TABLE 3-1: RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM
SUMMARY
SURRY NUCLEAR POWER STATION Docket No. 50-280-281 Sediment Silt GAMMA 6
(pCi/kg dry)
CS-134 6
150
<LLD N/A
<LLD
<LLD 0
Cs-137 6
180
<LLD N/A
<LLD
<LLD 0
K-40 6
12903 (4/4)
CHIC 11.2 mi.
17320 (2/2) 17320 (2/2) 0 (8303-16200)
WNW (17070-17570)
(17070-17570)
Ra-226 6
1870 (1/4)
CHIC 11.2 mi.
3548 (1/2) 3548 (1/2) 0 (1870-1870)
WNW (3548-3548)
(3548-3548)
Ac-228 6
1002 (3/4)
CHIC 11.2 mi.
1258 (1/2) 1258 (1/2) 0 (840-1109)
WNW (1258-1258)
(1258-1258)
Th-228 6
1083 (4/4)
CHIC 11.2 mi.
1345 (2/2) 1345 (2/2) 0 (906-1336)
WNW (1044-1646)
(1044-1646)
Th-232 6
1072 (2/4)
SD 1.3 mi.
1252 (1/2) 1158 (2/2) 0 (892-1252)
NNW (1252-1252)
(991-1325)
Shoreline Sediment GAMMA 4
(pCi/kg dry)
CS-134 4
150
<LLD N/A
<LLD
<LLD 0
CS-137 4
180
<LLD N/A
<LLD
<LLD 0
K-40 4
3045 (2/2)
CHIC 11.2 mi.
3586 (2/2) 3586 (2/2) 0 (1838-4251)
WNW (1566-5605)
(1566-5605)
Ra-226 4
997 (1/2)
CHIC 11.2 mi.
2039 (1/2) 2039 (1/2) 0 (997-997)
WNW (2039-2039)
(2039-2039)
Ac-228 4
798 (1/2)
HIR 0.6 mi.
798 (1/2)
<LLD 0
(798-798)
N (798-798)
Th-228 4
573 (2/2)
CHIC 11.2 mi.
642 (2/2) 642 (2/2) 0 (100-1046)
WNW (78.8-1206)
(78.8-1206)
Th-232 4
998 (1/2)
CHIC 11.2 mi.
1201 (1/2) 1201 (1/2) 0 (998-998)
WNW (1201-1201)
(1201-1201) 24
SurryNuclearPowerStation SurryCounty,Virginia AnnualRadiologicalEnvironmentalOperatingReport2024 Indicator Control Number of Medium or Analysis Total LLD Locations Locations Nonroutine Pathway Sampled Type Number Mean Distance Mean Mean Reported (Units)
(Range)
Number Direction (Range)
(Range)
Measurements Location with Highest Mean TABLE 3-1: RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM
SUMMARY
SURRY NUCLEAR POWER STATION Docket No. 50-280-281 Fish GAMMA 4
(pCi/kg wet)
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
K-40 4
2184 (4/4)
SD 1.3 mi.
2184 (4/4)
NA 0
(1430-2618)
NNW (1430-2618)
Oysters GAMMA 6
(pCi/kg wet)
Mn-54 6
130
<LLD N/A
<LLD N/A 0
Co-58 6
130
<LLD N/A
<LLD N/A 0
Fe-59 6
260
<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
Th-228 6
116 (1/6)
SHI 6.8 mi.
116 (1/6)
N/A 0
(116-116)
SE (116-116) 25
SurryNuclearPowerStation SurryCounty,Virginia AnnualRadiologicalEnvironmentalOperatingReport2024 Indicator Control Number of Medium or Analysis Total LLD Locations Locations Nonroutine Pathway Sampled Type Number Mean Distance Mean Mean Reported (Units)
(Range)
Number Direction (Range)
(Range)
Measurements Location with Highest Mean TABLE 3-1: RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM
SUMMARY
SURRY NUCLEAR POWER STATION Docket No. 50-280-281 Clams GAMMA 6
(pCi/kg wet)
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
Crabs GAMMA 1
(pCi/kg wet)
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
K-40 1
1261 (1/1)
SD 1.3 mi.
1261 (1/1)
N/A 0
(1261-1261)
NNW (1261-1261) 26
3.2 Analytical Results of 2024 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 27
Surry Nuclear Power Station Annual Radiological Environmental Operating Report 2024 Surry County, Virginia MDDQ = 3 x sQ
= 3 x 1.0 = 5 Note: IF MDDQ < 5 mR, THEN MDDQ rounded to 5 mR (ANSI N13.37)
MDDA = 3 x sA
= 3 x 2.3 = 10 Note: IF MDDA < 10 mR, THEN MDDA rounded to 10 mR (ANSI N13.37)
Quarterly Normalized Quarterly Quarterly Facility Annual Annual Annual
- Baseline, Monitoring Data, MQ Dose,a Base-Moni-Facility BQ (mrem per standard quarter)
FQ = MQ - BQ line, BA toring Dose,b
- Baseline, (mrem)
(mrem)
- Data, FA =
(mrem)
MA MA - BA 1
2 3
4 1
2 3
4 (mrem)
(mrem) 2 19.8 21.7 20.8 21.4 23.1 ND ND ND ND 79.2 87.0 ND 3
19.2 21.3 20.0 18.3 20.3 ND ND ND ND 76.9 79.9 ND 4
17.9 20.5 19.3 19.4 20.8 ND ND ND ND 71.7 80.1 ND 5
19.0 20.5 21.6 21.8 21.1 ND ND ND ND 76.0 85.1 ND 6
18.4 20.2 20.1 19.2 20.6 ND ND ND ND 73.8 80.1 ND 7
18.7 19.5 19.6 20.8 20.6 ND ND ND ND 74.6 80.6 ND 8
17.0 19.5 19.8 18.8 19.8 ND ND ND ND 68.4 77.9 ND 9
23.2 24.4 25.4 25.4 24.7 ND ND ND ND 92.8 100.0 ND 10 18.1 21.1 19.3 19.2 20.8 ND ND ND ND 72.5 80.3 ND 11 16.1 18.1 18.1 17.8 19.0 ND ND ND ND 64.2 72.9 ND 12 16.6 19.1 18.8 18.3 19.1 ND ND ND ND 66.4 75.3 ND 13 18.6 20.9 19.9 21.9 21.6 ND ND ND ND 74.5 84.4 ND 14 17.9 20.8 19.6 19.1 20.9 ND ND ND ND 71.6 80.4 ND 15 18.5 20.9 20.8 16.3 21.8 ND ND ND ND 74.1 79.7 ND 16 17.0 18.7 18.3 20.8 19.1 ND ND ND ND 67.7 76.9 ND 18 14.5 15.9 16.9 15.7 15.8 ND ND ND ND 58.0 64.3 ND 19 15.5 16.6 17.2 16.1 17.5 ND ND ND ND 62.1 67.3 ND 20 14.3 16.2 14.3 15.4 15.8 ND ND ND ND 57.4 61.7 ND 21 15.1 17.1 16.6 15.8 16.9 ND ND ND ND 60.5 66.4 ND 22 13.2 14.7 14.4 13.4 15.1 ND ND ND ND 52.7 57.7 ND 23 18.1 20.1 19.8 20.4 20.3 ND ND ND ND 72.3 80.6 ND 24 14.8 16.7 16.4 15.6 18.1 ND ND ND ND 59.2 66.9 ND 25 18.1 19.9 19.4 18.9 20.6 ND ND ND ND 72.3 78.9 ND 26 15.7 17.1 16.4 16.6 17.3 ND ND ND ND 62.9 67.4 ND 27 14.7 15.6 15.4 16.3 16.8 ND ND ND ND 58.7 64.0 ND 28 14.2 15.7 14.8 15.6 15.9 ND ND ND ND 56.8 62.0 ND 29 13.2 14.5 14.8 14.1 15.3 ND ND ND ND 52.9 58.7 ND 30 14.4 16.4 15.4 17.1 16.1 ND ND ND ND 57.7 65.0 ND 31 12.3 13.7 12.9 13.1 13.8 ND ND ND ND 49.2 53.5 ND 32 15.2 17.1 14.8 m
16.1 ND ND N/A ND 60.7 63.9 ND 33 14.2 17.1 15.9 16.3 17.4 ND ND ND ND 57.1 66.7 ND 34 16.0 18.4 18.6 18.1 18.3 ND ND ND ND 64.1 73.4 ND 35 18.6 21.4 20.8 20.6 20.4 ND ND ND ND 74.4 83.2 ND 36 18.6 20.9 20.8 20.3 21.4 ND ND ND ND 74.4 83.4 ND 37 15.4 18.1 18.9 16.3 17.3 ND ND ND ND 61.7 70.5 ND 38 20.9 19.3 19.6 19.6 21.4 ND ND ND ND 83.6 79.9 ND 39 14.9 17.2 16.4 15.8 16.5 ND ND ND ND 59.7 65.9 ND 40 16.2 18.9 16.6 17.6 18.6 ND ND ND ND 64.7 71.7 ND 41 21.8 24.8 24.8 24.5 22.8 ND ND ND ND 87.3 96.9 ND 42 16.4 18.2 17.4 18.2 17.8 ND ND ND ND 65.5 71.7 ND 43 14.3 15.7 15.6 15.7 16.5 ND ND ND ND 57.3 63.5 ND aND = Not detected, where MQ < (BQ + MDDQ) bND = 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 TABLE 3-2 GAMMA EXPOSURE RATE (mR/Std. Month) +/- 2 Sigma Monitoring Location 28
Surry Nuclear Power Station Surry County, Virginia Annual Radiological Environmental Operating Report 2024 COLLECTION DATE SS HIR BC ALL CP BASF FE NN-C January 9 12.2 +/- 2.72 7.35 +/- 2.38 11.1 +/- 2.69 7.88 +/- 2.51 11.7 +/- 2.68 12.1 +/- 2.77 12.5 +/- 2.70 11.5 +/- 2.68 January 16 17.6 +/- 2.80 13.6 +/- 2.53 17.5 +/- 2.79 16.3 +/- 2.76 17.1 +/- 2.75 19.8 +/- 2.95 20.0 +/- 2.87 17.8 +/- 2.78 January 23 17.8 +/- 2.89 12.6 +/- 2.56 17.7 +/- 2.90 13.9 +/- 2.71 17.8 +/- 2.87 19.3 +/- 3.01 17.9 +/- 2.85 17.3 +/- 2.86 January 30 7.03 +/- 2.19 3.53 +/- 1.88 5.59 +/- 2.08 6.85 +/- 2.20 8.14 +/- 2.24 6.22 +/- 2.16 5.94 +/- 2.08 6.31 +/- 2.10 Feburary 6 10.4 +/- 2.51 7.73 +/- 2.30 10.7 +/- 2.59 11.5 +/- 2.66 8.62 +/- 2.44 10.1 +/- 2.57 10.7 +/- 2.52 10.0 +/- 2.52 Feburary 13 9.23 +/- 2.48 8.46 +/- 2.38 13.2 +/- 2.72 11.2 +/- 2.64 8.21 +/- 2.41 10.0 +/- 2.56 8.11 +/- 2.37 7.24 +/- 2.34 Feburary 20 16.5 +/- 2.87 10.6 +/- 4.24 17.0 +/- 2.91 15.0 +/- 2.84 14.1 +/- 2.74 17.6 +/- 2.99 17.0 +/- 2.86 15.8 +/- 2.83 Feburary 27 17.1 +/- 2.92 13.4 +/- 2.68 22.7 +/- 3.23 17.8 +/- 3.02 19.2 +/- 3.01 18.5 +/- 3.03 16.2 +/- 2.82 17.8 +/- 2.94 March 5 3.82 +/- 2.13 7.05 +/- 2.30 11.5 +/- 2.56 10.9 +/- 2.54 10.4 +/- 2.46 10.0 +/- 2.51 9.74 +/- 2.42 9.54 +/- 2.44 March 12 5.43 +/- 2.27 2.54 +/- 2.24 A
6.38 +/- 2.35 6.15 +/- 2.36 5.57 +/- 2.28 6.74 +/- 2.41 4.55 +/- 2.17 5.38 +/- 2.25 March 18 17.0 +/- 3.19 10.2 +/- 2.77 22.7 +/- 3.51 20.2 +/- 3.41 20.1 +/- 3.35 23.5 +/- 3.58 18.9 +/- 3.26 14.5 +/- 3.04 March 26 13.6 +/- 2.49 8.15 +/- 2.16 12.1 +/- 2.48 11.8 +/- 2.50 10.1 +/- 2.36 9.31 +/- 2.36 12.1 +/- 2.44 10.3 +/- 2.34 Qtr. Avg. +/- 2 s.d.
12.3 +/- 10.1 9.33 +/- 6.18 14.0 +/- 11.2 12.5 +/- 8.72 12.6 +/- 9.83 13.6 +/- 11.6 12.8 +/- 10.4 12.0 +/- 9.11 April 2 16.0 +/- 2.83 10.3 +/- 2.47 18.3 +/- 2.90 15.6 +/- 2.78 15.9 +/- 2.74 16.2 +/- 2.81 19.4 +/- 2.9 15.7 +/- 2.74 April 9 6.43 +/- 2.32 7.14 +/- 2.35 4.59 +/- 2.24 6.17 +/- 2.36 5.35 +/- 2.26 5.78 +/- 2.33 6.61 +/- 2.31 6.24 +/- 2.29 April 16 12.2 +/- 2.59 10.1 +/- 2.45 14.2 +/- 2.74 12.4 +/- 2.65 12.7 +/- 2.60 14.4 +/- 2.73 13.2 +/- 2.59 11.6 +/- 2.50 April 23 11.7 +/- 2.64 9.07 +/- 2.49 13.3 +/- 2.78 12.8 +/- 2.79 14.8 +/- 2.84 13.6 +/- 2.87 11.7 +/- 2.70 10.5 +/- 2.62 April 30 17.7 +/- 2.83 12.3 +/- 2.52 18.2 +/- 2.91 18.3 +/- 2.92 15.8 +/- 2.72 17.9 +/- 2.89 16.8 +/- 2.77 15.0 +/- 2.67 May 7 11.1 +/- 2.43 7.28 +/- 2.17 11.4 +/- 2.48 14.6 +/- 2.68 11.6 +/- 2.44 12.0 +/- 2.53 10.8 +/- 2.39 10.9 +/- 2.41 May 14 7.76 +/- 2.25 7.79 +/- 2.24 12.1 +/- 2.55 13.5 +/- 2.66 11.6 +/- 2.49 12.6 +/- 2.62 11.6 +/- 2.49 11.2 +/- 2.46 May 21 4.81 +/- 2.11 5.34 +/- 2.14 5.35 +/- 2.20 3.66 +/- 2.08 4.61 +/- 2.10 5.46 +/- 2.22 4.88 +/- 2.11 5.86 +/- 2.18 May 28 12.1 +/- 2.50 9.05 +/- 2.30 15.1 +/- 2.73 13.4 +/- 2.64 11.1 +/- 2.46 14.0 +/- 2.67 14.3 +/- 2.63 9.48 +/- 2.36 June 4 13.0 +/- 2.78 8.39 +/- 2.50 15.0 +/- 2.94 12.0 +/- 2.78 13.0 +/- 2.75 13.5 +/- 2.86 16.6 +/- 2.92 11.8 +/- 2.70 June 11 10.9 +/- 2.50 9.77 +/- 2.78 13.0 +/- 2.69 14.3 +/- 2.82 10.3 +/- 2.75 14.5 +/- 2.82 14.6 +/- 2.72 10.1 +/- 2.50 June 18 12.2 +/- 2.74 12.0 +/- 3.00 16.9 +/- 2.96 15.6 +/- 2.93 14.1 +/- 2.81 14.1 +/- 2.84 13.1 +/- 2.68 11.7 +/- 2.64 June 24 6.90 +/- 2.72 8.49 +/- 2.80 8.71 +/- 2.88 9.47 +/- 2.96 10.6 +/- 3.00 11.0 +/- 3.06 8.19 +/- 2.80 5.09 +/- 2.61 Qtr. Avg. +/- 2 s.d.
11.0 +/- 7.42 9.00 +/- 3.89 12.8 +/- 8.77 12.4 +/- 7.96 11.7 +/- 6.99 12.7 +/- 7.17 12.4 +/- 8.31 10.4 +/- 6.4 A= <MDC TABLE 3-3 AIR PARTICULATES GROSS BETA RADIOACTIVITY (1.0E-3 pCi/m3 +/- 2 Sigma)
SAMPLING LOCATIONS 29
Surry Nuclear Power Station Surry County, Virginia Annual Radiological Environmental Operating Report 2024 TABLE 3-3 AIR PARTICULATES GROSS BETA RADIOACTIVITY (1.0E-3 pCi/m3 +/- 2 Sigma)
SAMPLING LOCATIONS COLLECTION DATE SS HIR BC ALL CP BASF FE NN-C July 2 12.9 +/- 2.24 9.36 +/- 2.01 14.4 +/- 2.36 13.9 +/- 2.33 11.6 +/- 2.17 12.5 +/- 2.25 15.4 +/- 2.36 10.0 +/- 2.04 July 9 14.1 +/- 2.72 10.1 +/- 2.46 16.8 +/- 2.88 16.2 +/- 2.89 15.1 +/- 2.80 17.8 +/- 2.98 15.8 +/- 2.78 16.6 +/- 2.88 July 16 12.0 +/- 2.58 9.82 +/- 2.44 13.2 +/- 2.75 12.3 +/- 2.74 9.21 +/- 2.60 12.2 +/- 2.72 13.3 +/- 2.68 12.9 +/- 2.73 July 23 12.0 +/- 2.71 14.1 +/- 2.80 15.3 +/- 2.86 15.3 +/- 2.90 17.2 +/- 2.97 17.3 +/- 3.03 17.1 +/- 2.91 16.5 +/- 2.97 July 30 12.8 +/- 2.78 11.2 +/- 2.66 12.5 +/- 2.72 11.7 +/- 2.73 12.3 +/- 2.72 11.3 +/- 2.70 12.5 +/- 2.66 12.6 +/- 2.73 August 6 16.9 +/- 2.91 13.8 +/- 2.72 18.5 +/- 2.96 13.2 +/- 2.71 16.6 +/- 2.87 17.7 +/- 2.96 19.8 +/- 2.97 17.0 +/- 2.88 August 13 12.6 +/- 2.63 12.5 +/- 2.61 14.2 +/- 2.71 10.8 +/- 2.55 14.0 +/- 2.75 13.1 +/- 2.74 15.2 +/- 2.75 15.4 +/- 2.83 August 20 18.0 +/- 3.08 13.7 +/- 2.84 19.3 +/- 3.16 16.1 +/- 3.03 20.0 +/- 3.20 17.2 +/- 3.09 19.5 +/- 3.08 21.3 +/- 3.26 August 27 15.4 +/- 2.80 15.1 +/- 2.77 18.1 +/- 2.97 14.1 +/- 2.78 15.4 +/- 2.83 17.9 +/- 3.00 15.9 +/- 2.78 21.2 +/- 3.13 September 3 22.2 +/- 3.31 19.3 +/- 3.14 22.6 +/- 3.31 25.1 +/- 3.46 25.9 +/- 3.47 27.5 +/- 3.58 26.4 +/- 3.42 28.1 +/- 3.60 September 10 8.72 +/- 2.35 9.53 +/- 2.40 12.2 +/- 2.57 12.8 +/- 2.66 13.7 +/- 2.68 11.1 +/- 2.55 12.4 +/- 2.55 14.6 +/- 2.74 September 17 21.5 +/- 3.07 22.2 +/- 3.09 23.6 +/- 3.19 23.8 +/- 3.23 21.3 +/- 3.08 24.9 +/- 3.29 22.5 +/- 3.07 24.6 +/- 3.26 September 24 9.53 +/- 2.44 11.7 +/- 2.57 13.6 +/- 2.76 10.1 +/- 2.58 11.8 +/- 2.66 10.7 +/- 2.62 12.6 +/- 2.64 13.3 +/- 2.76 Qtr. Avg. +/- 2 s.d.
14.5 +/- 8.31 13.3 +/- 7.73 16.5 +/- 7.46 15.0 +/- 9.17 15.7 +/- 9.13 16.2 +/- 10.53 16.8 +/- 8.47 17.2 +/- 10.39 October 1 9.58 +/- 2.51 10.1 +/- 2.54 14.0 +/- 2.73 12.3 +/- 2.67 14.2 +/- 2.74 12.7 +/- 2.69 11.7 +/- 2.54 13.1 +/- 2.68 October 8 19.0 +/- 2.90 16.1 +/- 2.74 19.2 +/- 2.99 19.9 +/- 3.07 19.7 +/- 3.03 20.6 +/- 3.12 19.2 +/- 2.93 23.6 +/- 3.24 October 15 18.8 +/- 2.99 13.2 +/- 2.67 19.4 +/- 3.07 18.3 +/- 3.04 19.4 +/- 3.06 20.0 +/- 3.10 16.4 +/- 2.82 20.6 +/- 3.11 October 22 17.6 +/- 3.06 12.1 +/- 2.76 16.1 +/- 2.89 16.3 +/- 2.97 17.1 +/- 3.00 18.9 +/- 3.12 19.2 +/- 3.03 19.5 +/- 3.13 October 29 23.6 +/- 3.18 20.4 +/- 3.02 23.3 +/- 3.14 23.5 +/- 3.23 28.2 +/- 3.42 29.3 +/- 3.51 26.4 +/- 3.27 26.7 +/- 3.36 November 5 13.4 +/- 2.77 12.2 +/- 2.70 14.6 +/- 2.83 14.3 +/- 2.87 17.7 +/- 3.02 13.4 +/- 2.83 17.7 +/- 2.94 18.2 +/- 3.06 November 12 11.1 +/- 2.55 12.3 +/- 2.62 16.4 +/- 2.85 16.9 +/- 2.93 16.3 +/- 2.89 14.7 +/- 2.80 17.4 +/- 2.86 14.8 +/- 2.80 November 19 14.7 +/- 2.79 11.2 +/- 2.59 12.5 +/- 2.66 15.8 +/- 2.90 16.5 +/- 2.92 14.5 +/- 2.85 18.1 +/- 2.94 18.6 +/- 3.02 November 26 17.8 +/- 2.96 14.8 +/- 2.80 16.5 +/- 2.89 17.6 +/- 3.00 17.5 +/- 2.98 21.5 +/- 3.23 24.2 +/- 3.24 18.6 +/- 3.04 December 3 19.3 +/- 3.00 13.8 +/- 2.71 21.7 +/- 3.11 20.2 +/- 3.09 20.4 +/- 3.06 22.8 +/- 3.22 22.0 +/- 3.07 22.3 +/- 3.17 December 10 18.4 +/- 2.97 18.0 +/- 2.93 18.0 +/- 2.94 17.9 +/- 3.00 19.2 +/- 3.04 22.8 +/- 3.28 26.8 +/- 3.35 22.5 +/- 3.22 December 18 11.7 +/- 2.35 11.8 +/- 2.36 14.1 +/- 2.48 11.5 +/- 2.40 12.5 +/- 2.43 16.0 +/- 2.64 16.2 +/- 2.56 14.9 +/- 2.56 December 24 12.1 +/- 2.84 12.6 +/- 2.86 14.8 +/- 3.01 11.8 +/- 2.89 14.0 +/- 3.00 14.2 +/- 3.10 14.4 +/- 2.95 14.3 +/- 3.02 December 31 15.4 +/- 2.77 13.1 +/- 2.63 16.3 +/- 2.81 14.8 +/- 2.77 19.3 +/- 2.99 17.3 +/- 2.93 20.3 +/- 2.98 16.9 +/- 2.87 Qtr. Avg. +/- 2 s.d.
15.9 +/- 7.93 13.7 +/- 5.60 16.9 +/- 6.16 16.5 +/- 6.88 18.0 +/- 7.54 18.5 +/- 9.38 19.3 +/- 8.71 18.9 +/- 7.90 Ann. Avg. +/- 2 s.d.
13.5 +/- 9.08 11.3 +/- 7.62 15.1 +/- 8.95 14.2 +/- 8.70 14.6 +/- 9.65 15.3 +/- 10.5 15.5 +/- 10.5 14.8 +/- 11.0 30
Surry Nuclear Power Station Surry County, Virginia Annual Radiological Environmental Operating Report 2024 COLLECTION DATE SS HIR BC ALL CP BASF FE NN-C January 9
-2.61 +/- 13.9
-2.54 +/- 13.6
-2.65 +/- 14.1
-2.66 +/- 14.2
-1.72 +/- 13.5
-1.78 +/- 14.0
-1.70 +/- 13.4
-1.73 +/- 13.6 January 16
-11.1 +/- 17.4
-10.8 +/- 16.9
-11.1 +/- 17.3
-11.3 +/- 17.6 9.07 +/- 17.8 9.34 +/- 18.3 8.92 +/- 17.5 8.98 +/- 17.6 January 23 10.7 +/- 20.1 10.5 +/- 19.6 10.8 +/- 20.2 10.9 +/- 20.5 2.92 +/- 18.6 3.01 +/- 19.2 2.87 +/- 18.3 2.93 +/- 18.7 January 30 4.52 +/- 17.9 4.40 +/- 17.4 4.51 +/- 17.8 4.59 +/- 18.1 0.25 +/- 16.0 0.25 +/- 16.4 0.25 +/- 15.8 0.24 +/- 15.8 Feburary 6 1.14 +/- 9.69 1.11 +/- 9.43 1.19 +/- 10.1 1.20 +/- 10.2 5.48 +/- 14.0 5.60 +/- 14.3 5.34 +/- 13.6 5.44 +/- 13.9 Feburary 13
-4.48 +/- 11.3
-4.35 +/- 11.0
-4.57 +/- 11.5
-4.64 +/- 11.7 0.95 +/- 13.3 0.97 +/- 13.6 0.92 +/- 13.0 0.94 +/- 13.1 Feburary 20
-5.53 +/- 17.6
-5.41 +/- 17.2
-5.66 +/- 18.0
-5.75 +/- 18.3
-5.73 +/- 11.3
-5.93 +/- 11.6
-5.65 +/- 11.1
-5.72 +/- 11.2 Feburary 27 7.52 +/- 16.3 5.60 +/- 12.1 7.81 +/- 16.9 7.93 +/- 17.2
-1.24 +/- 14.3
-1.26 +/- 14.5
-1.21 +/- 13.8
-1.23 +/- 14.1 March 5
-11.0 +/- 19.8
-10.7 +/- 19.2
-10.7 +/- 19.2
-10.7 +/- 19.3 10.4 +/- 14.0 10.8 +/- 14.5 10.3 +/- 13.9 10.5 +/- 14.1 March 12 2.66 +/- 18.3 2.61 +/- 18.0 2.67 +/- 18.4 2.70 +/- 18.6 6.57 +/- 12.3 6.72 +/- 12.6 4.22 +/- 7.92 6.48 +/- 12.2 March 18
-3.68 +/- 14.5
-3.63 +/- 14.4
-3.72 +/- 14.7
-3.76 +/- 14.9 8.84 +/- 13.7 9.04 +/- 14.0 6.62 +/- 10.3 8.75 +/- 13.6 March 26
-2.74 +/- 13.0
-2.69 +/- 12.7
-2.88 +/- 13.7
-2.93 +/- 13.9 0.28 +/- 11.3 0.29 +/- 11.6 0.21 +/- 8.46 0.27 +/- 11.1 April 2
-5.34 +/- 21.1
-5.29 +/- 20.9
-5.26 +/- 20.7
-5.33 +/- 21.0 3.61 +/- 11.8 3.72 +/- 12.2 1.72 +/- 5.63 3.60 +/- 11.8 April 9
-1.96 +/- 13.3
-1.95 +/- 13.2
-2.00 +/- 13.6
-2.02 +/- 13.7 3.81 +/- 11.3 3.90 +/- 11.6 2.50 +/- 7.44 3.74 +/- 11.1 April 16
-5.38 +/- 10.7
-5.35 +/- 10.6
-5.45 +/- 10.8
-5.49 +/- 10.9 0.11 +/- 16.3 0.11 +/- 16.5 0.11 +/- 15.9 0.11 +/- 15.8 April 23 0.01 +/- 14.3 0.01 +/- 14.2 0.01 +/- 14.6 0.01 +/- 14.8
-1.91 +/- 11.1
-2.00 +/- 11.6
-1.93 +/- 11.2
-1.91 +/- 11.1 April 30 1.66 +/- 12.0 1.65 +/- 11.9 1.71 +/- 12.3 1.71 +/- 12.3
-2.19 +/- 11.3
-2.26 +/- 11.7
-2.18 +/- 11.2
-2.16 +/- 11.2 May 7
-10.9 +/- 22.4
-10.9 +/- 22.3
-11.1 +/- 22.8
-11.2 +/- 22.9 7.35 +/- 17.9 7.59 +/- 18.5 7.30 +/- 17.8 7.33 +/- 17.9 May 14
-17.1 +/- 19.0
-17.0 +/- 18.9
-17.4 +/- 19.3
-17.7 +/- 19.7 4.83 +/- 13.6 4.99 +/- 14.0 4.81 +/- 13.5 3.64 +/- 10.2 May 21
-0.13 +/- 11.1
-0.13 +/- 11.1
-0.13 +/- 11.4
-0.13 +/- 11.4 4.95 +/- 13.4 5.10 +/- 13.8 4.90 +/- 13.3 4.88 +/- 13.2 May 28
-6.10 +/- 13.2
-2.76 +/- 5.96
-6.26 +/- 13.5
-6.28 +/- 13.6
-5.02 +/- 15.7
-5.13 +/- 16.0
-4.94 +/- 15.4
-4.99 +/- 15.6 June 4
-6.80 +/- 25.6
-6.72 +/- 25.3
-6.94 +/- 26.1
-6.94 +/- 26.1
-9.28 +/- 20.1
-9.61 +/- 20.9
-3.85 +/- 8.35
-9.30 +/- 20.2 June 11
-0.31 +/- 11.3
-0.37 +/- 13.5
-0.32 +/- 11.9
-0.33 +/- 12.2
-3.31 +/- 15.3
-3.04 +/- 14.0
-2.88 +/- 13.3
-2.93 +/- 13.5 June 18 4.62 +/- 12.0 5.22 +/- 13.5 4.56 +/- 11.8 4.65 +/- 12.0 3.79 +/- 8.93 3.83 +/- 9.02 3.63 +/- 8.55 3.69 +/- 8.69 June 24
-0.22 +/- 14.0
-0.21 +/- 13.9
-0.22 +/- 14.2
-0.22 +/- 14.4
-2.22 +/- 15.4
-2.25 +/- 15.6
-2.16 +/- 15.0
-2.17 +/- 15.0 TABLE 3-4 AIRBORNE IODINE (1.0E-3 pCi/m3 +/- 2 Sigma)
Sampling Stations 31
Surry Nuclear Power Station Surry County, Virginia Annual Radiological Environmental Operating Report 2024 TABLE 3-4 AIRBORNE IODINE (1.0E-3 pCi/m3 +/- 2 Sigma)
Sampling Stations COLLECTION DATE SS HIR BC ALL CP BASF FE NN-C July 2
-8.64 +/- 13.8
-8.53 +/- 13.7
-8.80 +/- 14.1
-8.80 +/- 14.1
-3.19 +/- 13.4
-3.24 +/- 13.6
-2.37 +/- 9.95
-3.11 +/- 13.1 July 9 19.4 +/- 21.2 19.1 +/- 21.0 19.6 +/- 21.5 19.9 +/- 21.8 6.70 +/- 20.4 6.80 +/- 20.8 6.47 +/- 19.7 6.66 +/- 20.3 July 16
-8.11 +/- 19.6
-8.04 +/- 19.4
-8.64 +/- 20.8
-8.86 +/- 21.4
-13.4 +/- 18.3
-12.9 +/- 17.7
-12.2 +/- 16.7
-12.7 +/- 17.3 July 23
-3.12 +/- 9.80
-3.08 +/- 9.67
-3.13 +/- 9.83
-3.19 +/- 10.0 0.09 +/- 11.7 0.09 +/- 12.0 0.09 +/- 11.3 0.09 +/- 11.8 July 30
-7.15 +/- 16.9
-7.08 +/- 16.7
-7.07 +/- 16.7
-7.23 +/- 17.1 6.83 +/- 18.9 6.92 +/- 19.2 3.12 +/- 8.65 6.75 +/- 18.7 August 6 2.11 +/- 20.0 2.08 +/- 19.8 2.07 +/- 19.6 2.12 +/- 20.1
-26.8 +/- 20.7
-27.1 +/- 21.0
-18.7 +/- 14.4
-26.5 +/- 20.4 August 13 0.44 +/- 15.0 0.44 +/- 14.9 0.44 +/- 15.0 0.45 +/- 15.2 8.16 +/- 15.3 8.31 +/- 15.6 7.87 +/- 14.8 8.13 +/- 15.3 August 20 7.06 +/- 13.3 6.99 +/- 13.1 7.08 +/- 13.3 7.17 +/- 13.5
-0.02 +/- 10.9
-0.02 +/- 11.1
-0.02 +/- 10.5
-0.02 +/- 10.9 August 27
-14.0 +/- 18.2
-13.9 +/- 18.1
-14.1 +/- 18.4
-14.3 +/- 18.6 1.04 +/- 15.4 1.05 +/- 15.6 0.99 +/- 14.7 1.03 +/- 15.3 September 3
-8.05 +/- 11.5
-7.93 +/- 11.3
-7.99 +/- 11.4
-8.10 +/- 11.6
-0.34 +/- 10.4
-0.35 +/- 10.6
-0.33 +/- 10.1
-0.34 +/- 10.5 September 10
-4.68 +/- 13.7
-4.67 +/- 13.7
-4.69 +/- 13.8
-4.82 +/- 14.1 2.43 +/- 9.40 2.44 +/- 9.46 2.34 +/- 9.05 2.42 +/- 9.36 September 17 3.84 +/- 10.6 3.82 +/- 10.6 3.87 +/- 10.7 3.92 +/- 10.8 10.4 +/- 10.8 10.5 +/- 11.0 9.97 +/- 10.4 6.92 +/- 7.22 September 24 9.58 +/- 14.0 9.57 +/- 14.0 10.06 +/- 14.7 10.1 +/- 14.9 1.41 +/- 14.2 1.42 +/- 14.3 1.36 +/- 13.6 1.41 +/- 14.2 October 1 5.27 +/- 10.2 5.24 +/- 10.1 5.21 +/- 10.0 5.29 +/- 10.2 1.48 +/- 11.6 1.50 +/- 11.8 1.43 +/- 11.2 1.467 +/- 11.5 October 8
-0.74 +/- 13.1
-0.74 +/- 13.0
-0.78 +/- 13.7
-0.88 +/- 15.5
-0.78 +/- 13.7
-3.78 +/- 8.31
-3.57 +/- 7.86
-3.71 +/- 8.16 October 15
-2.54 +/- 10.0
-2.51 +/- 9.92
-2.66 +/- 10.5
-2.69 +/- 10.6
-0.65 +/- 11.6
-0.65 +/- 11.6
-0.62 +/- 11.1
-0.64 +/- 11.5 October 22 0.29 +/- 15.4 0.29 +/- 15.4 0.28 +/- 14.9 0.29 +/- 15.4 9.23 +/- 16.4 9.35 +/- 16.6 4.05 +/- 7.18 9.20 +/- 16.3 October 29 0.79 +/- 7.02 0.79 +/- 6.97 0.78 +/- 6.90 0.80 +/- 7.15
-6.30 +/- 15.9
-6.38 +/- 16.1
-6.07 +/- 15.3
-6.24 +/- 15.7 November 5 2.81 +/- 10.2 2.81 +/- 10.2 2.80 +/- 10.2 2.87 +/- 10.4
-6.14 +/- 13.3
-6.22 +/- 13.4
-5.88 +/- 12.7
-6.11 +/- 13.2 November 12
-6.27 +/- 16.2
-6.26 +/- 16.2
-6.27 +/- 16.2
-6.45 +/- 16.7
-3.69 +/- 16.9
-3.68 +/- 16.9
-3.52 +/- 16.1
-3.65 +/- 16.7 November 19 6.65 +/- 18.8 6.64 +/- 18.8 6.63 +/- 18.8 6.81 +/- 19.3
-0.27 +/- 16.3
-0.27 +/- 16.5
-0.26 +/- 15.7
-0.27 +/- 16.1 November 26 17.2 +/- 22.2 17.2 +/- 22.1 17.1 +/- 22.1 17.6 +/- 22.7 1.10 +/- 19.6 1.12 +/- 20.0 1.06 +/- 18.9 1.09 +/- 19.5 December 3 5.41 +/- 13.0 5.41 +/- 13.0 5.40 +/- 13.0 5.52 +/- 13.3 0.11 +/- 14.7 0.12 +/- 15.0 0.11 +/- 14.2 0.11 +/- 14.7 December 10 10.1 +/- 16.8 9.99 +/- 16.7 9.98 +/- 16.7 10.3 +/- 17.2
-13.0 +/- 18.9
-13.3 +/- 19.4
-12.6 +/- 18.4
-13.0 +/- 19.0 December 18 1.82 +/- 12.4 1.82 +/- 12.4 1.82 +/- 12.4 1.88 +/- 12.8
-7.62 +/- 10.9
-7.75 +/- 11.0
-3.54 +/- 5.04
-7.57 +/- 10.8 December 24
-20.5 +/- 18.2
-20.4 +/- 18.1
-20.5 +/- 18.2
-21.1 +/- 18.7 4.79 +/- 21.7 4.98 +/- 22.5 4.62 +/- 20.9 4.77 +/- 21.6 December 31
-8.57 +/- 21.1
-8.54 +/- 21.0
-8.53 +/- 21.0
-8.73 +/- 21.5
-16.5 +/- 16.1
-16.8 +/- 16.4
-8.17 +/- 7.97
-16.4 +/- 16.0 A= <MDC 32
Surry Nuclear Power Station Surry County, Virginia Annual Radiological Environmental Operating Report 2024 SAMPLING LOCATIONS Nuclide 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Avg. +/- 2 s.d.
SS CS-134
-0.64 +/- 0.69
-0.42 +/- 0.92
-0.16 +/- 0.74 0.71 +/- 0.98 CS-137 0.17 +/- 0.65 0.11 +/- 0.69 0.35 +/- 0.61
-0.05 +/- 0.83 BE-7 97.6 +/- 17.6 97.8 +/- 21.1 114 +/- 25.7 78.7 +/- 20.2 97.0 +/- 28.7 HIR CS-134
-0.16 +/- 0.79
-0.33 +/- 0.57 0.43 +/- 0.82
-0.37 +/- 1.14 CS-137 0.28 +/- 0.62
-0.39 +/- 0.69
-0.37 +/- 0.74 0.11 +/- 0.82 BE-7 68.3 +/- 15.9 77.0 +/- 18.5 70.6 +/- 29.4 75.0 +/- 24.3 72.7 +/- 7.96 BC CS-134
-0.46 +/- 0.66
-0.52 +/- 0.83 0.23 +/- 0.54
-0.61 +/- 0.87 CS-137
-0.18 +/- 0.45
-0.26 +/- 0.72
-0.02 +/- 0.52 0.24 +/- 0.57 BE-7 105 +/- 15.6 108 +/- 25.9 114 +/- 18.8 67.3 +/- 21.5 98.4 +/- 42.3 ALL CS-134 0.02 +/- 0.85 0.39 +/- 1.18
-0.51 +/- 0.73
-0.31 +/- 0.54 CS-137
-0.33 +/- 0.67
-0.11 +/- 0.83 0.39 +/- 0.67
-0.32 +/- 0.40 BE-7 113 +/- 19.0 111 +/- 22.2 93.0 +/- 21.9 85.4 +/- 19.0 101 +/- 27.1 CP CS-134
-0.45 +/- 0.66 0.15 +/- 0.72
-0.49 +/- 0.69 0.05 +/- 0.78 CS-137
-0.48 +/- 0.57 0.12 +/- 0.59
-0.05 +/- 0.57
-0.53 +/- 0.67 BE-7 71.6 +/- 17.7 134 +/- 27.0 110 +/- 21.8 103 +/- 24.4 105 +/- 51.6 BASF CS-134 0.41 +/- 0.73
-0.37 +/- 0.56 0.18 +/- 0.33 0.80 +/- 0.86 CS-137
-0.32 +/- 0.70
-0.32 +/- 0.40
-0.04 +/- 0.23 0.06 +/- 0.87 BE-7 94.5 +/- 18.2 144 +/- 22.6 132 +/- 18.3 100 +/- 20.9 118 +/- 48.0 FE CS-134
-0.91 +/- 0.91
-1.10 +/- 1.19
-0.04 +/- 0.45
-0.33 +/- 0.99 CS-137 0.83 +/- 0.81 A 0.27 +/- 1.10 0.15 +/- 0.35
-0.13 +/- 0.83 BE-7 90.0 +/- 24.3 152 +/- 31.0 120 +/- 15.9 105 +/- 25.3 117 +/- 53.0 NN-C CS-134
-1.01 +/- 0.70
-0.30 +/- 0.74
-0.44 +/- 0.75
-0.12 +/- 0.46 CS-137 0.00 +/- 0.58 0.10 +/- 0.51 0.09 +/- 0.56 0.36 +/- 0.46 BE-7 79.6 +/- 18.4 91.7 +/- 20.9 137 +/- 22.1 135 +/- 19.1 111 +/- 58.8 A= <MDC (1.0E-3 pCi/m3 +/- 2 Sigma)
TABLE 3-5 AIR PARTICULATES GAMMA EMITTER CONCENTRATIONS 33
Surry Nuclear Power Station Surry County, Virginia Annual Radiological Environmental Operating Report 2024 BEACHY NUCLIDE
- COLONIAL PARKWAY FARM-C JANUARY Cs-134
-1.27 +/- 3.88
-4.21 +/- 5.63 Cs-137
-0.77 +/- 5.46
-1.01 +/- 5.28 Ba-140 4.05 +/- 18.5
-5.19 +/- 20.1 La-140 1.07 +/- 5.26 2.91 +/- 5.53 I-131
-0.10 +/- 0.46
-0.10 +/- 0.44 K-40 1295 +/- 176 1038 +/- 161 FEBRUARY Cs-134
-2.66 +/- 5.11 1.06 +/- 3.90 Cs-137 2.77 +/- 5.67 1.61 +/- 4.44 Ba-140 11.6 +/- 14.6 3.02 +/- 15.1 La-140 4.10 +/- 5.84 1.33 +/- 4.67 I-131
-0.59 +/- 0.41
-0.24 +/- 0.51 K-40 1225 +/- 223 1038 +/- 137 MARCH Cs-134
-0.46 +/- 4.20
-1.67 +/- 4.31 Cs-137
-0.98 +/- 4.18
-2.51 +/- 4.85 Ba-140
-0.05 +/- 18.1 4.11 +/- 16.7 La-140
-1.03 +/- 5.11 3.57 +/- 4.86 I-131 0.40 +/- 0.49 0.07 +/- 0.43 K-40 1292 +/- 137 888 +/- 160 Sr-89 1.20 +/- 2.72 Sr-90 1.51 +/- 0.61 APRIL Cs-134 2.25 +/- 3.32 1.31 +/- 5.31 Cs-137
-2.31 +/- 3.38 5.62 +/- 5.53 A
Ba-140 3.79 +/- 11.4 19.7 +/- 19.3 A La-140 0.92 +/- 3.84 0.90 +/- 4.20 I-131 0.82 +/- 0.62 A 0.55 +/- 0.59 K-40 1313 +/- 121 759 +/- 158 MAY Cs-134 2.26 +/- 4.57 8.04 +/- 5.42 A Cs-137
-0.68 +/- 4.05 0.72 +/- 5.00 Ba-140
-4.26 +/- 18.0
-2.18 +/- 22.4 La-140
-0.53 +/- 6.56
-2.01 +/- 7.47 I-131
-0.37 +/- 0.38 0.09 +/- 0.44 K-40 1395 +/- 155 1340 +/- 160
- Sr-89/90 analysis performed quarterly on location Colonial Parkway only.
A= <MDC TABLE 3-6 MILK GAMMA EMMITER AND STRONTIUM CONCENTRATIONS (pCi/Liter +/- 2 Sigma) 34
Surry Nuclear Power Station Surry County, Virginia Annual Radiological Environmental Operating Report 2024 BEACHY NUCLIDE
- COLONIAL PARKWAY FARM-C JUNE Cs-134 1.87 +/- 5.12
-7.03 +/- 6.01 Cs-137
-1.31 +/- 4.58
-3.43 +/- 4.66 Ba-140
-11.6 +/- 21.7
-2.1 +/- 17.9 La-140 1.58 +/- 6.23
-1.39 +/- 8.22 I-131 0.45 +/- 0.54
-0.17 +/- 0.38 K-40 1292 +/- 185 1272 +/- 183 Sr-89 3.99 +/- 2.66 A Sr-90 2.22 +/- 0.69 JULY Cs-134
-1.97 +/- 4.73 2.41 +/- 3.58 Cs-137
-5.17 +/- 5.01 1.14 +/- 3.75 Ba-140
-7.63 +/- 19.1 10.1 +/- 17.1 La-140
-2.56 +/- 5.18
-0.67 +/- 5.24 I-131 0.27 +/- 0.51 0.33 +/- 0.51 K-40 1278 +/- 161 1408 +/- 161 AUGUST Cs-134
-0.30 +/- 5.77 2.51 +/- 5.77 Cs-137
-1.66 +/- 5.14 3.64 +/- 5.00 Ba-140
-3.61 +/- 24.5 3.23 +/- 24.4 La-140
-2.97 +/- 6.85 1.60 +/- 6.32 I-131
-0.61 +/- 0.41
-0.30 +/- 0.35 K-40 1402 +/- 180 1409 +/- 182 SEPTEMBER Cs-134 0.41 +/- 5.32
-0.38 +/- 4.71 Cs-137
-0.61 +/- 5.95 0.31 +/- 5.56 Ba-140 1.80 +/- 18.0
-0.55 +/- 19.5 La-140
-2.72 +/- 5.41 1.28 +/- 4.52 I-131 0.17 +/- 0.49 0.15 +/- 0.47 K-40 1189 +/- 174 1052 +/- 172 Sr-89
-0.25 +/- 2.37 Sr-90 1.60 +/- 0.64 OCTOBER Cs-134
-0.26 +/- 2.55 1.67 +/- 2.33 Cs-137 2.79 +/- 2.61 A 3.23 +/- 2.63 A Ba-140 2.22 +/- 9.31 2.72 +/- 9.01 La-140
-1.16 +/- 2.48
-1.65 +/- 2.67 I-131 0.28 +/- 0.44
-0.11 +/- 0.28 K-40 1293 +/- 93.6 1010 +/- 90.2
- Sr-89/90 analysis performed quarterly on location Colonial Parkway only.
A= <MDC TABLE 3-6 MILK GAMMA EMMITER AND STRONTIUM CONCENTRATIONS (pCi/Liter +/- 2 Sigma) 35
Surry Nuclear Power Station Surry County, Virginia Annual Radiological Environmental Operating Report 2024 BEACHY NUCLIDE
- COLONIAL PARKWAY FARM-C NOVEMBER Cs-134 3.45 +/- 4.66 1.58 +/- 5.04 Cs-137 3.51 +/- 5.48 1.77 +/- 4.64 Ba-140 14.0 +/- 23.3 27.2 +/- 16.9 A La-140
-2.18 +/- 7.11 2.42 +/- 5.76 I-131 0.84 +/- 0.55 A 0.51 +/- 0.50 A K-40 1320 +/- 185 932 +/- 164 DECEMBER Cs-134 0.42 +/- 3.61
-0.46 +/- 3.50 Cs-137 1.48 +/- 3.65 1.82 +/- 3.26 Ba-140
-6.78 +/- 15.5
-5.21 +/- 13.3 La-140 1.15 +/- 4.40 0.11 +/- 4.42 I-131
-0.05 +/- 0.46
-0.22 +/- 0.43 K-40 1276 +/- 131 1042 +/- 110 Sr-89 2.92 +/- 2.94 Sr-90
-0.03 +/- 0.56
- Sr-89/90 analysis performed quarterly on location Colonial Parkway only.
GAMMA EMMITER AND STRONTIUM CONCENTRATIONS (pCi/Liter +/- 2 Sigma)
TABLE 3-6 MILK 36
Surry Nuclear Power Station Surry County, Virginia Annual Radiological Environmental Operating Report 2024 SAMPLING COLLECTION SAMPLE LOCATIONS DATE TYPE Cs-134 Cs-137 I-131 K-40 BROCK 10/29/2024 PEANUTS 4.16 +/- 5.78 6.85 +/- 6.92 16.3 +/- 32.3 5370 +/- 316 FARM 11/26/2024 CORN
-5.39 +/- 6.54 3.16 +/- 6.16
-9.07 +/- 25.3 1941 +/- 225 Th-228 10/29/2024 PEANUTS 23.2
+/- 19.6 Cs-134 Cs-137 I-131 K-40 SLADE 11/12/2024 SOYBEANS 0.16 +/- 22.9
-9.80 +/- 21.3 8.17 +/- 24.9 19060 +/- 1090 FARM TABLE 3-7 FOOD PRODUCTS GAMMA EMMITER CONCENTRATIONS (pCi/kg (wet) +/- 2 Sigma)
NUCLIDE 37
Surry Nuclear Power Station Surry County, Virginia Annual Radiological Environmental Operating Report 2024 SAMPLING COLLECTION LOCATIONS DATE Mn-54 Co-58 Fe-59 Co-60 Zn-65 SS 3/26/2024 0.42 +/- 2.45
-1.04 +/- 2.56
-3.38 +/- 5.47
-0.29 +/- 3.03
-0.43 +/- 7.01 6/18/2024
-1.36 +/- 4.40
-0.71 +/- 4.00 2.76 +/- 7.96
-4.55 +/- 4.45
-9.19 +/- 9.5 9/10/2024
-0.02 +/- 3.50
-2.75 +/- 3.07
-1.18 +/- 6.93 1.13 +/- 4.35
-12.9 +/- 8.55 12/10/2024
-0.98 +/- 3.35
-1.15 +/- 3.81 0.92 +/- 6.80
-1.04 +/- 3.49
-1.65 +/- 7.86 Nb-95 Zr-95 I-131 Cs-134 Cs-137 3/26/2024 0.16 +/- 2.55
-1.77 +/- 3.50
-0.33 +/- 0.38
-0.29 +/- 2.69
-0.74 +/- 2.36 6/18/2024 1.74 +/- 3.91 1.30 +/- 7.18 0.02 +/- 0.53
-1.47 +/- 5.05
-3.39 +/- 4.14 9/10/2024 0.69 +/- 3.62 0.25 +/- 5.63 0.00 +/- 0.49
-0.82 +/- 3.88 1.65 +/- 3.38 12/10/2024
-1.02 +/- 3.68
-4.61 +/- 6.69 0.24 +/- 0.50 0.77 +/- 4.14 1.69 +/- 3.71 Ba-140 La-140 H-3 3/26/2024 1.09 +/- 11.2
-1.08 +/- 3.12 238 +/- 754 6/18/2024
-8.88 +/- 14.9 1.17 +/- 5.91
-451 +/- 621 9/10/2024 3.61 +/- 11.9 1.29 +/- 5.02 5.27 +/- 658 12/10/2024 6.54 +/- 16.4 0.29 +/- 6.01 336 +/- 591 Mn-54 Co-58 Fe-59 Co-60 Zn-65 HIR 3/26/2024
-0.48 +/- 3.52
-0.64 +/- 2.65 1.09 +/- 6.65 0.29 +/- 4.24
-2.87 +/- 7.85 6/18/2024
-0.22 +/- 2.32 0.56 +/- 1.86 3.08 +/- 5.95 1.10 +/- 2.50
-7.15 +/- 6.68 9/10/2024 2.38 +/- 2.65 0.50 +/- 2.64 4.80 +/- 5.16 2.24 +/- 3.07
-4.07 +/- 6.77 12/10/2024 0.42 +/- 2.93 0.87 +/- 3.00 0.89 +/- 7.29
-0.94 +/- 3.36 3.77 +/- 7.36 Nb-95 Zr-95 I-131 Cs-134 Cs-137 3/26/2024 1.64 +/- 3.09
-3.36 +/- 5.21 0.07 +/- 0.30
-0.96 +/- 3.60 0.99 +/- 3.56 6/18/2024
-0.41 +/- 2.75
-0.16 +/- 5.13 0.04 +/- 0.44 1.64 +/- 2.64 0.52 +/- 2.70 9/10/2024
-0.07 +/- 2.90
-1.00 +/- 3.62 0.14 +/- 0.50 0.32 +/- 2.82
-0.71 +/- 2.40 12/10/2024
-0.55 +/- 3.32
-5.13 +/- 5.74
-0.08 +/- 0.46 0.19 +/- 3.34 0.78 +/- 3.34 Ba-140 La-140 H-3 3/26/2024
-0.20 +/- 13.0 1.25 +/- 4.12 44.9 +/- 756 6/18/2024 6.05 +/- 9.85
-3.27 +/- 3.49
-578 +/- 873 9/10/2024
-3.64 +/- 9.91 2.42 +/- 3.64 42.3 +/- 661 12/10/2024
-19.4 +/- 13.5
-0.15 +/- 4.78 88.8 +/- 573 Mn-54 Co-58 Fe-59 Co-60 Zn-65 TC 3/26/2024 0.84 +/- 3.48
-1.13 +/- 3.60 4.89 +/- 7.12 2.08 +/- 3.29
-6.00 +/- 9.25 6/18/2024
-2.28 +/- 3.53
-2.42 +/- 4.02
-1.59 +/- 7.64 2.18 +/- 3.61 2.34 +/- 7.55 9/10/2024 0.82 +/- 3.19 0.30 +/- 2.75 0.49 +/- 5.64 3.41 +/- 3.42
-15.1 +/- 9.45 12/10/2024
-0.34 +/- 3.75 1.90 +/- 3.80 1.19 +/- 5.68
-0.71 +/- 3.61
-15.8 +/- 8.89 Nb-95 Zr-95 I-131 Cs-134 Cs-137 3/26/2024
-0.06 +/- 3.67 5.64 +/- 7.25
-0.03 +/- 0.41
-2.02 +/- 4.14
-0.52 +/- 3.58 6/18/2024 4.96 +/- 4.57 A
-2.08 +/- 6.68 0.29 +/- 0.56
-1.16 +/- 3.99 0.37 +/- 4.05 9/10/2024 4.55 +/- 3.46 A
-2.27 +/- 5.50 0.15 +/- 0.54
-2.73 +/- 3.46 0.35 +/- 3.15 12/10/2024
-3.41 +/- 3.17
-1.16 +/- 5.44 0.24 +/- 0.50
-1.80 +/- 3.29 0.97 +/- 3.44 Ba-140 La-140 H-3 3/26/2024
-8.48 +/- 13.2 2.99 +/- 3.86
-277 +/- 730 6/18/2024
-3.82 +/- 13.6 3.18 +/- 5.30 337 +/- 674 9/10/2024
-5.59 +/- 13.0
-1.49 +/- 3.79
-78.9 +/- 652 12/10/2024 2.07 +/- 15.5 2.58 +/- 4.53 285 +/- 586 A= <MDC NUCLIDE TABLE 3-8 WELL WATER GAMMA EMMITER AND TRITIUM CONCENTRATIONS (pCi/Liter +/- 2 Sigma) 38
Surry Nuclear Power Station Surry County, Virginia Annual Radiological Environmental Operating Report 2024 SAMPLING COLLECTION LOCATIONS DATE Mn-54 Co-58 Fe-59 Co-60 Zn-65 SD 1/2/2024
-3.30 +/- 3.99
-2.11 +/- 4.18
-0.66 +/- 8.65
-3.81 +/- 3.88
-12.1 +/- 10.7 2/6/2024 1.35 +/- 3.74 1.13 +/- 3.35
-2.70 +/- 7.68
-0.57 +/- 4.41
-3.45 +/- 8.58 3/5/2024 2.46 +/- 3.63
-1.01 +/- 3.21 7.51 +/- 7.71 0.81 +/- 3.80
-1.73 +/- 7.08 4/2/2024 0.99 +/- 3.32
-1.24 +/- 3.45
-0.02 +/- 8.03
-1.26 +/- 3.97 6.30 +/- 8.10 5/7/2024
-0.93 +/- 3.32
-2.97 +/- 4.28
-5.21 +/- 6.87 0.09 +/- 3.33
-1.45 +/- 8.39 6/4/2024 1.25 +/- 2.65
-2.18 +/- 2.30 1.24 +/- 4.81
-1.73 +/- 3.01
-7.05 +/- 6.37 7/2/2024 1.20 +/- 2.93 0.26 +/- 2.73
-1.56 +/- 5.38 0.34 +/- 3.24
-2.78 +/- 6.09 8/6/2024 0.29 +/- 3.53
-2.44 +/- 3.32
-3.36 +/- 7.01 0.77 +/- 3.11 3.81 +/- 7.51 9/3/2024 4.75 +/- 4.53 A
0.78 +/- 3.81 3.18 +/- 7.99 0.78 +/- 3.65
-0.01 +/- 8.41 10/1/2024 3.19 +/- 3.70
-0.25 +/- 4.24 8.01 +/- 8.73
-4.53 +/- 5.04
-1.27 +/- 8.96 11/5/2024 0.69 +/- 4.21
-0.78 +/- 3.36 4.18 +/- 8.16 3.37 +/- 5.05
-1.65 +/- 8.35 12/3/2024
-0.50 +/- 3.22 0.72 +/- 3.43
-0.62 +/- 5.43 2.04 +/- 3.20 2.50 +/- 6.71 Nb-95 Zr-95 I-131 Cs-134 Cs-137 1/2/2024 5.05 +/- 3.90 A 4.29 +/- 5.90
-3.80 +/- 5.82 0.80 +/- 3.92
-0.70 +/- 4.92 2/6/2024
-3.01 +/- 3.79
-0.56 +/- 5.36
-2.24 +/- 3.81 0.55 +/- 3.94 3/5/2024 1.92 +/- 2.96 1.56 +/- 4.35 1.34 +/- 4.24
-1.62 +/- 4.09 4/2/2024
-2.77 +/- 3.77
-1.31 +/- 4.29
-0.16 +/- 3.83
-5.09 +/- 4.29 5/7/2024
-0.84 +/- 3.94 0.25 +/- 5.29
-1.48 +/- 4.06 1.16 +/- 3.94 6/4/2024
-2.68 +/- 3.12
-0.68 +/- 3.39
-0.60 +/- 2.62
-2.42 +/- 3.06 7/2/2024
-3.46 +/- 2.95 0.40 +/- 5.70 1.53 +/- 3.03
-1.04 +/- 2.86 8/6/2024 1.99 +/- 3.12 1.67 +/- 5.49 0.82 +/- 3.22
-1.76 +/- 3.42 9/3/2024
-0.48 +/- 4.71 4.39 +/- 5.29
-6.24 +/- 4.81 0.64 +/- 3.98 10/1/2024 1.40 +/- 4.13 1.15 +/- 5.11 0.47 +/- 4.41 2.66 +/- 4.54 11/5/2024 0.01 +/- 3.95 2.45 +/- 4.31 2.38 +/- 3.91
-0.39 +/- 4.57 12/3/2024 3.12 +/- 3.30
-3.72 +/- 6.38 6.05 +/- 5.89 A
-0.29 +/- 6.22 3.34 +/- 7.53 1.58 +/- 4.28 1.09 +/- 5.07 0.38 +/- 6.23 1.96 +/- 7.41 1.24 +/- 7.44 0.48 +/- 6.87 3.56 +/- 5.74 1.04 +/- 4.42
-2.85 +/- 3.74 0.73 +/- 2.96 Ba-140 La-140 H-3 K-40 1/2/2024
-1.11 +/- 17.4 1.50 +/- 5.34 2/6/2024
-9.60 +/- 14.4 2.61 +/- 5.83 3/5/2024 8.19 +/- 14.5 4.00 +/- 4.01
-11.2 +/- 793 4/2/2024 3.26 +/- 15.0 0.89 +/- 4.53 5/7/2024
-21.0 +/- 17.0 0.14 +/- 4.45 117 +/- 56.3 6/4/2024 0.52 +/- 8.68
-3.10 +/- 3.65
-86.3 +/- 773 84.0 +/- 60.9 7/2/2024
-1.24 +/- 14.9 2.15 +/- 4.91 78.0 +/- 50.2 8/6/2024 5.17 +/- 15.1
-3.18 +/- 5.16 112 +/- 60.1 9/3/2024
-7.38 +/- 15.2 2.64 +/- 5.70 768 +/- 779 10/1/2024 6.26 +/- 14.8
-1.29 +/- 6.04 11/5/2024
-12.7 +/- 12.2
-2.62 +/- 4.80 97.3 +/- 67.8 12/3/2024
-7.88 +/- 13.4 2.61 +/- 5.26 179 +/- 617 A= <MDC NUCLIDE TABLE 3-9 RIVER WATER GAMMA EMITTER AND TRITIUM CONCENTRATIONS (pCi/Liter +/- 2 Sigma) 39
Surry Nuclear Power Station Surry County, Virginia Annual Radiological Environmental Operating Report 2024 SAMPLING COLLECTION LOCATIONS DATE Mn-54 Co-58 Fe-59 Co-60 Zn-65 SW-C 1/2/2024 2.85 +/- 3.33
-1.82 +/- 3.23
-1.49 +/- 7.28 2.35 +/- 3.68
-7.99 +/- 8.06 2/6/2024 0.37 +/- 3.02 0.57 +/- 3.27 1.65 +/- 6.48
-0.71 +/- 3.69
-0.60 +/- 6.58 3/5/2024
-0.43 +/- 3.34 1.27 +/- 3.11 1.60 +/- 4.84 3.24 +/- 3.04 A
2.82 +/- 7.11 4/2/2024
-1.38 +/- 3.89
-0.56 +/- 3.93
-0.55 +/- 8.48 5.36 +/- 4.24 A
-9.35 +/- 10.1 5/7/2024 2.30 +/- 2.43
-1.41 +/- 2.34 4.05 +/- 4.88
-3.34 +/- 2.95
-4.93 +/- 5.68 6/4/2024 1.65 +/- 3.86 0.01 +/- 4.39 2.95 +/- 8.13 4.81 +/- 4.28 A
-10.7 +/- 9.58 7/2/2024 2.71 +/- 2.99
-0.64 +/- 3.14 1.50 +/- 6.03
-1.96 +/- 2.89
-7.51 +/- 7.16 8/6/2024 0.95 +/- 2.94 0.45 +/- 3.01 0.73 +/- 5.98 2.37 +/- 3.34
-5.38 +/- 6.00 9/3/2024 0.87 +/- 4.29 0.64 +/- 3.17
-1.93 +/- 6.90
-1.06 +/- 4.49
-7.84 +/- 10.0 10/1/2024 1.86 +/- 3.56
-0.49 +/- 3.15 2.00 +/- 7.78 1.20 +/- 3.76
-6.38 +/- 7.97 11/5/2024 0.85 +/- 3.63 2.39 +/- 3.94 1.14 +/- 8.44 2.79 +/- 3.32
-5.75 +/- 8.19 12/3/2024
-0.43 +/- 1.76
-0.96 +/- 1.87
-0.97 +/- 4.98 1.05 +/- 2.38
-5.81 +/- 5.97 Nb-95 Zr-95 I-131 Cs-134 Cs-137 1/2/2024 3.40 +/- 3.58 2.33 +/- 5.91
-3.88 +/- 5.94 0.22 +/- 3.46
-3.83 +/- 3.61 2/6/2024 1.53 +/- 3.28 1.87 +/- 5.07
-0.77 +/- 5.18 2.40 +/- 3.36 2.15 +/- 3.92 3/5/2024
-1.10 +/- 3.63 0.25 +/- 6.05 2.74 +/- 3.89 0.31 +/- 3.26
-2.17 +/- 3.36 4/2/2024
-1.99 +/- 3.60 1.69 +/- 7.08
-1.64 +/- 5.34
-1.19 +/- 4.70
-1.03 +/- 4.43 5/7/2024
-1.27 +/- 2.64
-3.56 +/- 4.62 1.23 +/- 4.09 0.69 +/- 2.76
-1.08 +/- 2.68 6/4/2024
-2.41 +/- 3.72 1.80 +/- 7.23 1.65 +/- 5.04 0.82 +/- 4.26 2.09 +/- 4.80 7/2/2024
-0.82 +/- 3.69 1.39 +/- 6.10
-0.91 +/- 6.03
-0.03 +/- 3.31 1.73 +/- 3.02 8/6/2024 2.72 +/- 2.99
-2.38 +/- 5.57 1.42 +/- 5.42
-4.04 +/- 3.00
-1.10 +/- 2.91 9/3/2024 0.70 +/- 4.34
-3.04 +/- 6.54 1.40 +/- 4.23 0.63 +/- 4.93 0.90 +/- 4.13 10/1/2024
-1.95 +/- 3.69 4.27 +/- 7.71 1.27 +/- 4.55 0.07 +/- 3.38 1.85 +/- 4.25 11/5/2024
-3.18 +/- 4.01
-1.52 +/- 8.16
-0.32 +/- 4.73
-1.38 +/- 4.07 1.14 +/- 4.58 12/3/2024 0.43 +/- 2.19 5.00 +/- 3.34 A
-0.51 +/- 2.62
-1.39 +/- 2.67 2.00 +/- 2.75 Ba-140 La-140 H-3 1/2/2024
-5.92 +/- 16.1
-2.47 +/- 4.95 2/6/2024 1.43 +/- 15.3
-0.81 +/- 5.00 3/5/2024
-3.12 +/- 10.4 1.68 +/- 4.11
-213 +/- 783 4/2/2024 1.95 +/- 16.3
-1.55 +/- 4.12 5/7/2024
-2.15 +/- 12.0 5.65 +/- 4.16 A
6/4/2024
-0.56 +/- 17.2 2.94 +/- 6.71 304 +/- 790 7/2/2024
-14.3 +/- 15.1 0.29 +/- 6.11 8/6/2024 2.52 +/- 14.0 0.18 +/- 4.71 9/3/2024
-2.57 +/- 15.0 0.87 +/- 5.12 397 +/- 753 10/1/2024
-4.36 +/- 14.1
-1.59 +/- 4.36 11/5/2024 0.64 +/- 14.5
-1.73 +/- 4.44 12/3/2024 3.37 +/- 6.95 1.08 +/- 3.21 366 +/- 631 A= <MDC TABLE 3-9 RIVER WATER GAMMA EMITTER AND TRITIUM CONCENTRATIONS (pCi/Liter +/- 2 Sigma)
NUCLIDE 40
Surry Nuclear Power Station Surry County, Virginia Annual Radiological Environmental Operating Report 2024 SAMPLING COLLECTION LOCATIONS DATE Cs-134 Cs-137 K-40 Th-228 SD 4/2/2024 120 +/- 67.7 A
66.3 +/- 62.0 A
13280 +/- 1736 906 +/- 230 9/24/2024 76.3 +/- 59.2 A
70.5 +/- 63.9 A
16200 +/- 1936 1336 +/- 152 Th-232 Ac-228 Ra-226 4/2/2024 1252 +/- 224 9/24/2024 1058 +/- 349 1870 +/- 1702 Cs-134 Cs-137 K-40 Th-228 SI 4/2/2024 82.2 +/- 64.3 A
120 +/- 74.7 A
13830 +/- 1916 1029 +/- 211 9/24/2024 73.3 +/- 66.6 A
42.8 +/- 73.1 8303 +/- 1573 1061 +/- 139 Th-232 Ac-228 4/2/2024 840 +/- 274 9/24/2024 892 +/- 276 1109 +/- 349 Cs-134 Cs-137 K-40 Th-228 CHIC-C 4/10/2024 87.6 +/- 78.6 A
46.4 +/- 73.1 17070 +/- 2294 1044 +/- 216 9/23/2024 57.4 +/- 52.2 A
141 +/- 53.7 17570 +/- 1785 1646 +/- 148 Th-232 Ac-228 Ra-226 4/10/2024 991 +/- 337 1258 +/- 640 9/23/2024 1325 +/- 191 3548 +/- 1541 A= <MDC NUCLIDE TABLE 3-10 SEDIMENT SILT GAMMA EMITTER CONCENTRATIONS (pCi/kg (dry) +/- 2 Sigma) 41
Surry Nuclear Power Station Surry County, Virginia Annual Radiological Environmental Operating Report 2024 SAMPLING COLLECTION LOCATIONS DATE Cs-134 Cs-137 K-40 Th-228 Th-232 HIR 2/13/2024
-2.18 +/- 22.4 1.24 +/- 21.1 1838 +/- 515 100 +/- 58.4 8/20/2024 67.5 +/- 42.5 A
-12.9 +/- 33.5 4251 +/- 862 1046 +/- 93.8 998 +/- 172 Ac-228 Ra-226 2/13/2024 997 +/- 605 8/20/2024 798 +/- 320 Cs-134 Cs-137 K-40 Th-228 Th-232 CHIC-C 2/13/2024
-14.1 +/- 24.4 4.63 +/- 24.5 5605 +/- 826 78.8 +/- 55.0 8/20/2024 57.9 +/- 50.3 A
-40.1 +/- 41.2 1566 +/- 681 1206 +/- 122 1201 +/- 194 Ra-226 2/13/2024 8/20/2024 2039 +/- 1341 A= <MDC TABLE 3-11 SHORELINE SEDIMENT GAMMA EMITTER CONCENTRATIONS (pCi/kg (dry) +/- 2 Sigma)
NUCLIDE 42
Surry Nuclear Power Station Surry County, Virginia Annual Radiological Environmental Operating Report 2024 SAMPLING COLLECTION LOCATION DATE FISH TYPE Mn-54 Co-58 Fe-59 Co-60 SD 4/22/2024 Catfish
-0.51 +/- 45.2
-13.4 +/- 47.0 4.81 +/- 98.1 29.6 +/- 47.3 4/22/2024 Gamefish
-21.1 +/- 50.7
-5.68 +/- 60.3 8.42 +/- 125 44.1 +/- 55.3 10/28/2024 Catfish 0.22 +/- 22.2 8.64 +/- 28.5
-14.9 +/- 47.8 2.33 +/- 27.2 10/28/2024 Gamefish 18.4 +/- 21.8 9.28 +/- 28.0
-1.09 +/- 60.9 21.9 +/- 31.7 Zn-65 Cs-134 Cs-137 K-40 4/22/2024 Catfish 7.45 +/- 72.5 31.5 +/- 39.6
-29.2 +/- 40.1 2581 +/- 929 4/22/2024 Gamefish 12.9 +/- 125 17.7 +/- 54.2
-13.7 +/- 59.8 2618 +/- 1140 10/28/2024 Catfish
-45.9 +/- 74.3
-14.8 +/- 26.3
-12.9 +/- 28.2 1430 +/- 556 10/28/2024 Gamefish
-23.2 +/- 64.6
-1.39 +/- 23.3
-12.1 +/- 28.0 2108 +/- 863 NUCLIDE TABLE 3-12 FISH GAMMA EMITTER CONCENTRATIONS (pCi/kg (wet) +/- 2 Sigma) 43
Surry Nuclear Power Station Surry County, Virginia Annual Radiological Environmental Operating Report 2024 SAMPLING COLLECTION LOCATIONS DATE Mn-54 Co-58 Fe-59 Co-60 POS 4/10/2024
-2.61 +/- 38.8 22.1 +/- 43.8
-4.17 +/- 86.6 51.3 +/- 44.1 A
9/24/2024 10.0 +/- 43.3
-6.24 +/- 55.4 127 +/- 115 A
-32.4 +/- 47.8 Zn-65 Cs-134 Cs-137 4/10/2024
-33.3 +/- 67.7 24.6 +/- 35.4 40.8 +/- 41.7 9/24/2024
-132 +/- 96.6
-25.7 +/- 43.0
-56.6 +/- 39.5 Mn-54 Co-58 Fe-59 Co-60 MP 4/10/2024
-10.5 +/- 22.3 25.2 +/- 29.7 56.2 +/- 57.6 5.63 +/- 25.0 9/24/2024 12.1 +/- 35.2
-24.4 +/- 42.6
-50.4 +/- 107
-28.0 +/- 41.4 Zn-65 Cs-134 Cs-137 4/10/2024
-26.4 +/- 57.3 5.14 +/- 28.4 18.4 +/- 29.4 9/24/2024
-43.9 +/- 91.3 31.1 +/- 37.9 39.8 +/- 44.6 Mn-54 Co-58 Fe-59 Co-60 SHI 4/10/2024 30.3 +/- 48.9
-18.8 +/- 52.7
-62.2 +/- 98.4 26.8 +/- 52.9 9/24/2024
-22.8 +/- 28.3
-21.3 +/- 30.0
-18.5 +/- 85.0
-7.46 +/- 22.8 Zn-65 Cs-134 Cs-137 Th-228 4/10/2024
-58.9 +/- 107 30.8 +/- 48.3
-4.15 +/- 48.9 116 +/- 92.1 9/24/2024 29.9 +/- 62.1 16.2 +/- 30.6 17.5 +/- 25.5 A= <MDC TABLE 3-13 OYSTERS GAMMA EMITTER CONCENTRATIONS (pCi/kg (wet) +/- 2 Sigma)
NUCLIDE 44
Surry Nuclear Power Station Surry County, Virginia Annual Radiological Environmental Operating Report 2024 SAMPLING COLLECTION LOCATIONS DATE Mn-54 Co-58 Fe-59 Co-60 JI 4/2/2024 15.0 +/- 30.8
-26.7 +/- 38.1 23.4 +/- 99.6
-13.0 +/- 40.3 9/24/2024 32.1 +/- 51.3
-35.5 +/- 49.0 136 +/- 127 A
-19.3 +/- 32.5 Zn-65 Cs-134 Cs-137 4/2/2024
-86.5 +/- 101
-1.10 +/- 46.9 34.8 +/- 38.8 9/24/2024 28.4 +/- 108 34.6 +/- 47.8 35.3 +/- 45.2 Mn-54 Co-58 Fe-59 Co-60 SD 3/13/2024
-14.5 +/- 31.6 22.5 +/- 45.7 32.5 +/- 122
-0.86 +/- 34.6 9/23/2024
-42.8 +/- 47.6
-38.4 +/- 58.2 116 +/- 122 31.3 +/- 50.7 Zn-65 Cs-134 Cs-137 3/13/2024
-80.5 +/- 83.7 41.7 +/- 38.9 A
3.60 +/- 33.8 9/23/2024 44.2 +/- 140 0.58 +/- 49.5
-43.1 +/- 49.4 Mn-54 Co-58 Fe-59 Co-60 CHIC-C 4/10/2024
-34.3 +/- 43.6
-24.4 +/- 48.1 11.6 +/- 123
-25.0 +/- 45.9 9/23/2024
-1.17 +/- 42.7
-9.10 +/- 52.6
-144 +/- 133
-51.3 +/- 49.8 Zn-65 Cs-134 Cs-137 4/10/2024
-37.5 +/- 94.2 35.8 +/- 51.4
-10.4 +/- 36.6 9/23/2024 22.0 +/- 122
-9.67 +/- 62.8
-25.1 +/- 60.2 A= <MDC TABLE 3-14 CLAMS GAMMA EMITTER CONCENTRATIONS (pCi/kg (wet) +/- 2 Sigma)
NUCLIDE 45
Surry Nuclear Power Station Surry County, Virginia Annual Radiological Environmental Operating Report 2024 SAMPLING COLLECTION LOCATIONS DATE Mn-54 Co-58 Fe-59 Co-60 SD 6/28/2024
-9.36 +/- 24.3 11.2 +/- 29.7
-22.4 +/- 61.3
-9.94 +/- 30.2 Zn-65 Cs-134 Cs-137 K-40 6/28/2024
-10.0 +/- 48.7 3.49 +/- 30.6
-18.8 +/- 29.4 1261 +/- 686 TABLE 3-15 CRABS GAMMA EMITTER CONCENTRATIONS (pCi/kg (wet) +/- 2 Sigma)
NUCLIDE 46
- 4. DISCUSSION OF RESULTS Data from the radiological analyses of environmental media collected during 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 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 reporting period.
47
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. No detectable external dose to members of the public was attributable from Surry Power Station in 2024. 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. These samples are collected weekly and analyzed for gross beta activity. Results of the weekly gross beta analyses are presented in Table 3-3. The analysis results from the control and indicator locations continue 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.
48
0.000 0.005 0.010 0.015 0.020 0.025 0.030 0.035 0.040 0.045 1/09 1/23 2/06 2/20 3/05 3/19 4/02 4/16 4/30 5/14 5/28 6/11 6/25 7/09 7/23 8/06 8/20 9/03 9/17 10/01 10/15 10/29 11/12 11/26 12/10 12/24 pCi/m3 Figure 4-1:
2024 GROSS BETA AIR PARTICULATES Avg Indicator Ave Control 1.0E-03 1.0E-02 1.0E-01 1.0E+00 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 pCi/m3 Figure 4-2:
GROSS BETA IN AIR PARTICULATES 10 YEAR HISTORICAL TREND Avg Indicator Avg Control Avg-Pre Op Required LLD 49
4.3 Airborne Radioiodine Air is also continuously sampled for radioiodine by passing air through a charcoal cartridge. Weekly, 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 the air samples.
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 analysis 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 of 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 the 2024 milk samples. Only naturally occurring potassium-40 was detected. The analysis results are presented in Table 3-6.
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.
Strontium-89 was not detected in any of the four composite samples analyzed. Strontium-90 was detected in three of the four composite samples, with an average concentration of 1.78.pCi/L. Strontium-90 is not a component of station radiological effluents and is a product of nuclear weapons testing fallout.
50
4.6 Food Products Three food product samples (corn, peanuts, and soybeans) were collected and analyzed by gamma spectroscopy. The analysis results are presented in Table 3-7. Only naturally occurring potassium-40 was detected in all samples. Naturally occurring thorium-228 was detected in peanuts. No station related radioactivity was detected in this pathway.
4.7 Well Water Well water is not impacted by the station's operations since there are no effluent discharges into this pathway. However, Surry Power Station monitors well water on a quarterly frequency at three indicator locations. These samples are analyzed for gamma radiation and tritium. The results are presented in Table 3-8. In 2024, no radioactivity related to the station was found in the well water. Historically, before the station began operations, no gamma-emitting isotopes were detected in well water samples, serving as its baseline.
4.8 River Water Water samples from the James River are collected each month, with the results presented in Table 3-9. All samples are analyzed by gamma spectroscopy. Additionally, monthly samples are combined and analyzed for tritium every quarter. In 2024, no station related radioactivity was detected in this pathway. Only naturally occurring potassium-40 was detected.
51
4.9 Silt Silt is sampled to evaluate the 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. The accumulation of radionuclides in silt could indirectly increase the radioactivity levels in clams, oysters, crabs, and fish.
Samples of silt are collected from three locations: one upstream of the station, one downstream of the station and one in the dredge area of the station intake. The results of the gamma spectroscopy analyses are presented in Table 3-10. Naturally occurring 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 shown in Figures 4-3 and 4-4. For three decades, the calculated average concentration for cesium-137 has continued to decrease.
The presence of cesium-137 in indicator location, Station Intake, and control location, Chickahominy, 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 average pre-operational cesium-137 concentration is shown in Figure 4-4.
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 of cesium-137 concentration in silt within the dredge channel at the station intake is regularly monitored and evaluated.
The average cesium-137 concentration in the Station Intake dredge channel was 133 pCi/kg.
The average cesium-137 concentration in the Station Discharge Canal was 113 pCi/kg.
The average cesium-137 concentration at the Chickahominy control location was 135 pCi/kg.
The indicator location concentrations trend well with the Chickahominy control location.
52
Chickahominy had detectable Co-60 activity in 1982 and 1984 through 1994. Other years were less than minimum detectable activity (MDA). Station Discharge Co-60 activity was < MDA activity 1996 through 1998 and 2004 through 2024.
1.0E+00 1.0E+01 1.0E+02 1.0E+03 1.0E+04 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 2022 2024 pCi/kg dry Figure 4-3:
COBALT-60 IN SILT Control - Chickahominy Station Discharge LLD Avg Station Intake 1.0E+01 1.0E+02 1.0E+03 1.0E+04 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 2022 2024 pCi/kg dry Figure 4-4:
CESIUM-137 IN SILT Control - Chickahominy Station Discharge Station Intake Ave-Pre Op Required LLD 53
4.10 Shoreline Sediment Shoreline sediment, unlike river silt, may provide a direct dose to humans. A buildup of radionuclides along the shoreline may provide a source of direct exposure for those utilizing the area for commercial and recreational uses. The analysis results for this pathway are presented in Table 3-11.
The naturally occurring radionuclides including potassium-40, radium-226, actinium-228, thorium-228, and thorium-232 were detected at concentrations equivalent to normal background. In 2024, no station related radioactivity was detected in this pathway.
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 2024 analysis results are similar to those seen over the last decade. Only naturally occurring potassium-40 was detected.
No station related radioactivity was detected in fish samples.
4.12 Oysters The results of the gamma spectroscopy analyses in oyster samples are presented in Table 3-13. One of the two samples from Swash Hole Island contained naturally occurring thorium-228. In 2024, no station related radioactivity was detected in oyster samples. No station related radioactivity has been detected in oysters since 1991.
4.13 Clams The results of the gamma spectroscopy analyses in clam samples are presented in Table 3-14. In 2024, no gamma emitting radionuclides attributable to the operation of the station were detected in clams samples.
4.14 Crabs The results of the gamma spectroscopy analyses of the annual crab sample are presented in Table 3-15. Aside from naturally occurring potassium-40, no gamma-emitting radionuclides associated with station effluents were detected in this medium. This is consistent with pre-operational data and data collected over the past decade.
54
- 5. PROGRAM EXCEPTIONS There were two exceptions to the REMP sampling schedule in 2024.
The exceptions are detailed below:
- 1. The calibration of 1-SW-RM-120 did not meet ODCM requirements. The calibration source's activity fell below the procedural standards. A six-month deferral for detector calibration was approved, which is in violation of ODCM requirements (at least once per 18 months). Subsequently, the detector for 1-SW-RM-120 was replaced, calibrated, and returned to service.
- 2. All environmental TLDs at location #32 (Budweiser) were missing during the quarterly environmental TLD exchange for the third quarter of 2024. Therefore, no TLD data for the third quarter was displayed. All TLDs for this location were present during the forth quarter TLD exchange.
55
- 6. CONCLUSIONS The 2024 Radiological Environmental Monitoring Program analysis results for Surry Power Station are recorded in Section 3 and discussed in Section 4 of this document.
This section provides a conclusion of each listed pathway.
Direct Radiation Exposure Pathway - No detectable external dose to members of the public was attributable to the operation of Surry Power Station in 2024.
Airborne Exposure Pathway - No radioiodine was detected in any of the charcoal cartridge samples. The quarterly composite of weekly collected particulate filters only identified naturally occurring beryllium-7. Figure 4-1 shows that air particulate gross beta concentrations at all indicator locations align closely with those at control locations.
Review of the 2024 effluent data concluded that the station's 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 nor iodine-131 activity was detected in this pathway. Only naturally occurring potassium-40 was detected in the monthly samples. Strontium-90 was detected in each of the quarterly composite samples with an average concentration of 1.50 pCi/L. Strontium-90 is not a component of station effluents, but rather a product of nuclear weapons testing fallout.
Food Products - Naturally occurring potassium-40 was detected in all three food product samples. Naturally occurring thorium-228 was only detected in the peanut sample. Food product sample analysis results indicate no radioactivity was attributable to the operation of the station.
Well Water - Well water samples were analyzed for gamma emitting radionuclides and tritium. Well water sample analysis results 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. River water sample analysis results indicate no radioactivity was attributable to the operation of the station.
56 56
Silt - No radioactivity attributable to the operation of the station was detected in either of the indicator locations. Naturally occurring potassium-40, radium-226, actinium-228, thorium-228, and thorium-232 were detected in both indicator and control samples. In addition, Cs-137 was identified in the Chickahominy control location sample.
This is indicative of the accumulation, through runoff, of cesium-137 into the James River from residual weapons testing fallout.
Shoreline Sediment - No radionuclides attributable to the operation of Surry Power Station was detected in any of the shoreline sediment samples. Only naturally occurring potassium-40, thorium-228, and thorium-232 were detected.
Aquatic Biota Fish - Other than naturally occurring potassium-40, no other positive gamma emitting radionuclides were detected in any of the fish samples.
Oysters - Other than naturally occurring thorium-228, 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, no other positive gamma emitting radionuclides were detected in any of the crab samples.
57
REFERENCES 58 58
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.
59
APPENDICES 60
APPENDIX A: LAND USE CENSUS Year 2024 61
DOMINION ENERGY 0-HSP-REMP-001 Surry Power Station Revision 15 Page 9 of 13 (Page 1 of 1)
LAND USE CENSUS SECTOR NEAREST RESIDENT NEAREST 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° (a)
(a)
L-(SW) 2.3 @ 221° 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 radius center of Unit 1 Containment.
(a) None 62
APPENDIX B:
SUMMARY
OF INTERLABORATORY COMPARISONS Year 2024 63
Summary of Results - Inter-laboratory Comparison Program (ICP)
The Teledyne Brown Engineering Environmental Services (TBE-ES) laboratory analyzed Performance Evaluation (PE) samples of air particulate (AP), milk, soil, vegetation, and water matrices that represent test and matrix combinations available for REMP programs. The PE samples supplied by Eckert & Ziegler (E&Z) 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. E&Z Analytics Evaluation Criteria Analytics evaluation report provides a ratio of TBEs result and E&Z Analytics known value. Since flag values are not assigned by E&Z Analytics, TBE evaluates the reported ratios based on internal QC requirements based on the DOE MAPEP criteria.
- 1. A = Acceptable - reported result falls within ratio limits of 0.80-1.20
- 2. W = Acceptable with warning - reported result falls within 0.70-0.80 or 1.20-1.30
- 3. N = Not Acceptable - reported result falls outside the ratio limits of < 0.70 and > 1.30 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.
- 1. A = Acceptable - Reported value falls within the Acceptance Limits
- 2. N = Not Acceptable - Reported value falls outside of the Acceptance Limits C. DOE Evaluation Criteria MAPEPs evaluation report provides an acceptance range with associated flag values. MAPEP defines three levels of performance:
- 1. Acceptable (flag = A) - result within +/- 20% of the reference value
- 2. Acceptable with Warning (flag = W) - result falls in the +/- 20% to +/- 30% of the reference value
- 3. 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 always resemble typical environmental samples obtained at commercial nuclear power facilities.
The Inter-Laboratory Comparison Program provides evidence of in control counting systems and methods, and that the laboratories are producing accurate and reliable data. For the TBE laboratory, 152 out of 167 analyses performed met the specified acceptance criteria. Fifteen analyses did not meet the specified acceptance criteria and were addressed through the TBE Corrective Action Program. A summary is found below:
64
A. NCR 24-02: ERA March MRAD-40 study with Air Particulate AM-241 evaluated as Not Acceptable. TBE reported 38.8 pCi/filter and the known value returned at 55.0 pCi/filter (range 39.3-73.3). The root cause investigation determined that the sample was not logged into the system correctly and therefore not prepared with the required tracer. To correct and prevent recurrence, personnel involved are to utilize a template to ensure all analyses are logged as required and the QA Manager will perform sample log review as a back up to ensure accuracy.
Acceptable results returned in a later sample study, supporting effectiveness of corrective action.
B. NCR 24-03: ERA March MRAD-40 air particulate study GR-B evaluated as Not Acceptable. TBE reported 42.1 pCi/filter and the known value returned at 22.2 pCi/filter (range 13.5-33.5). The root cause investigation determined that alpha-to-beta crosstalk was more significant than normal which caused the beta activity to report falsely high data. To correct and prevent recurrence, personnel involved are to adjust the alpha-to-beta crosstalk via correction calculation measures when high alpha activities are observed. Acceptable results returned in a later sample study, supporting effectiveness of corrective action.
C. NCR 24-05: ERA April RAD-137 water study GR-A evaluated as Not Acceptable. TBE reported 35.2 pCi/L and the known value returned at 52.6 pCi/L (range 39.6-65.6). The root cause investigation determined that the provided samples contained a solids content that was significantly higher than the typical client samples tested by the laboratory. A set aliquot volume for prior ERA samples was used and not adjusted to account for the sudden increase in solid content. To correct and prevent recurrence, new sample types were ordered from ERA that used Am-241 to better reflect client sample testing and acceptable results were achieved. Acceptable results returned in a later sample study, supporting effectiveness of corrective action.
D. NCR 24-06: E&Z Analytics March E14092 air particulate study Co-60 evaluated as Not Acceptable. TBE reported 168 pCi and the known value returned at 126 pCi. Additionally, March E14093 soil Ce-141 evaluated as Not Acceptable. TBE reported 0.106pCi/g and the known value returned at 0.071pCi/g. The root cause investigation was unable to determine any anomaly thus no proposed corrective action. No recurrence has occurred.
E. CAR 24-02 (CAR 23-31): MAPEP February 24-MaS50 soil study Fe-55 evaluated as Not Acceptable. TBE reported 297 Bq/Kg and the known value returned at 650 Bq/Kg (range 455-845). The root cause investigation suspects that the current analytical procedure is not sufficient to add the interferences added to the sample by MAPEP. This investigation is still ongoing (See NCR 24-16) as the suggested corrective action did not provide desired results.
F. NCR 24-08: MAPEP February 24-MaS50 soil study Ni-63 evaluated as Not Acceptable. TBE reported 1070 Bq/Kg and the known value returned at 1530 Bq/Kg (range 1071-1989). The root cause investigation suspected that the sample contained added interferences that are not typically seen in client samples. All QC efforts associated with the sample were acceptable and no anomalies found, even after reanalysis. To correct and prevent recurrence, samples suspected of additional interferences will include the addition of Ni-59 tracer to determine yield results when calculating results. TBE analytical procedure TBE-2013 was updated to include this change.
G. NCR 24-09: MAPEP February 24-MaSU50 urine study Zn-65 evaluated as Not Acceptable. The root cause investigation determined that the sample was spiked lower than TBEs typical detection limit and client requirements. The report was revised by MAPEP indicating Not Evaluated, resulting in this nuclide to not be considered a failure.
65
H. NCR 24-10: MAPEP February 24-MaW50 water study Tc-99 evaluated as Not Acceptable. TBE reported 9.95Bq/L and the known value returned 7.47Bq/L (range 5.23-9.71). The root cause investigation suspects Thorium interference that was not removed during the column separation process of the analytical procedure; however, it cannot be confirmed as all QC efforts associated with the sample were acceptable and with no anomalies found. To potentially correct and prevent recurrence, an additional rinse step was added to the procedure. Acceptable results returned in a later sample study, supporting effectiveness of corrective action.
I. NCR 24-11: MAPEP February 24-RdV50 vegetation study Sr-90 evaluated as Not Acceptable. TBE reported 0.276Bq/sample and the known value returned 0.529Bq/sample (range 0.370-0.688).
The root cause investigation determined a laboratory accident resulting in a spilled (loss) of sample. No corrective action was performed as the cause was an unintentional sample spill.
J. NCR 24-14: ERA September MRAD-41 air particulate study U-234/238 evaluated as Not Acceptable. TBE reported 14.0/14.2 pCi/filter and the known value returned at 31.1/30.9 pCi/filter (range 23.1-36.9). The root cause investigation determined that the laboratory technician placed double the amount of tracer in the sample by error. To correct and prevent recurrence, samples that have been digested/leached with carrier/tracer added will have a label placed over the cap indicating it has already been added. Additionally, the beaker that aliquot is put in should have markings to indicate carrier/tracer has already been added to the sample.
K. NCR 24-15: ERA September MRAD-41 water study Fe-55 evaluated as Not Acceptable. TBE reported 615 pCi/L and the known value returned at 1230 pCi/L (range 723-1790). The root cause is still under investigation.
L. NCR 24-16: MAPEP August 24-MaS51 soil study Fe-55 evaluated as Not Acceptable. TBE did not report a value and the known value returned 780Bq/Kg (range 546-1014). The root cause is still under investigation.
M. NCR 24-17: MAPEP August 24-RdV51 vegetation study Sr-90 evaluated as Not Acceptable. TBE reported 0.95Bq/sample and the known value returned 2.39Bq/sample (range 1.67-3.11). The root cause is still under investigation.
66
Month/Year Identification Number Matrix Nuclide Units TBE Reported Value Known Value (a)
Ratio of TBE to Analytics Result Evaluation (b)
March 2024 E14089 Milk Sr-89 pCi/L 79.6 78.2 1.02 A
Sr-90 pCi/L 12.6 11.9 1.06 A
E14090 Milk Ce-141 pCi/L 75.6 85.0 0.89 A
Co-58 pCi/L
-0.069 Not Measured Co-60 pCi/L 139 158 0.88 A
Cr-51 pCi/L 212 230 0.92 A
Cs-134 pCi/L 167 198 0.84 A
Cs-137 pCi/L 158 171 0.93 A
Fe-59 pCi/L 81.1 86.5 0.94 A
I-131 pCi/L 80.9 90.8 0.89 A
Mn-54 pCi/L 173 183 0.95 A
Zn-65 pCi/L 165 176 0.93 A
E14091 Charcoal I-131 pCi 90.1 90.3 1.00 A
E14092 AP Ce-141 pCi 68.1 67.5 1.01 A
Co-58 pCi 1.73 Not Measured Co-60 pCi 168 126 1.34 N(1)
Cr-51 pCi 182 183 0.99 A
Cs-134 pCi 157 157 1.00 A
Cs-137 pCi 132 136.0 0.97 A
Fe-59 pCi 70.3 68.6 1.02 A
Mn-54 pCi 144 145 0.99 A
Zn-65 pCi 125 140 0.89 A
E14093 Soil Ce-141 pCi/g 0.106 0.071 1.48 N(1)
Co-58 pCi/g
-0.005 Not Measured Co-60 pCi/g 0.121 0.133 0.91 A
Cr-51 pCi/g 0.198 0.194 1.02 A
Cs-134 pCi/g 0.206 0.166 1.24 W
Cs-137 pCi/g 0.207 0.209 0.99 A
Fe-59 pCi/g 0.063 0.073 0.87 A
Mn-54 pCi/g 0.140 0.153 0.91 A
Zn-65 pCi/g 0.149 0.148 1.01 A
E14094 AP Sr-89 pCi 83.9 90.6 0.93 A
Sr-90 pCi 11.7 13.8 0.85 A
September 2024 E14095 Milk Sr-89 pCi/L 88.0 92.3 0.95 A
Sr-90 pCi/L 12.4 15.2 0.82 A
E14096 Milk Ce-141 pCi/L 124 124 1.00 A
Co-58 pCi/L 154 150 1.03 A
Co-60 pCi/L 232 236 0.98 A
A.1 Analytics Environmental Radioactivity Cross Check Program Teledyne Brown Engineering Environmental Services (Page 1 of 6) 67
Month/Year Identification Number Matrix Nuclide Units TBE Reported Value Known Value (a)
Ratio of TBE to Analytics Result Evaluation (b)
A.1 Analytics Environmental Radioactivity Cross Check Program Teledyne Brown Engineering Environmental Services Cr-51 pCi/L 284 274 1.04 A
Cs-134 pCi/L 180.0 187 0.96 A
Cs-137 pCi/L 126 127 0.99 A
Fe-59 pCi/L 127.0 113 1.12 A
I-131 pCi/L 85.3 89.0 0.96 A
Mn-54 pCi/L 162 162 1.00 A
Zn-65 pCi/L 294 275 1.07 A
E14097 Charcoal I-131 pCi 98.8 92.6 1.07 A
E14098 AP Ce-141 pCi 82.0 76.7 1.07 A
Co-58 pCi 91.0 92.6 0.98 A
Co-60 pCi 180 146 1.23 W
Cr-51 pCi 208 170 1.22 W
Cs-134 pCi 116 116 1.00 A
Cs-137 pCi 83.1 78.9 1.05 A
Fe-59 pCi 75.6 70.2 1.08 A
Mn-54 pCi 101 100 1.01 A
Zn-65 pCi 167 170 0.98 A
E14099 Soil Ce-141 pCi/g 0.224 0.222 1.01 A
Co-58 pCi/g 0.249 0.268 0.93 A
Co-60 pCi/g 0.420 0.423 0.99 A
Cr-51 pCi/g 0.492 0.492 1.00 A
Cs-134 pCi/g 0.278 0.336 0.83 A
Cs-137 pCi/g 0.276 0.295 0.94 A
Fe-59 pCi/g 0.233 0.204 1.14 A
Mn-54 pCi/g 0.279 0.290 0.96 A
Zn-65 pCi/g 0.538 0.494 1.09 A
E14100 AP Sr-89 pCi 79.8 82.7 0.96 A
Sr-90 pCi 12.0 13.6 0.88 A
E14197 Liquid Gr-A (Am241) pCi/L 47.6 50.1 0.95 A
Gr-B (Cs137) pCi/L 248 270 0.92 A
(a) The Analytics known value is equal to 100% of the parameter present in the standard as determined by gravimetric and/or volumetric measurements made during standard preparation (b) Analytics evaluation based on TBE internal QC limits:
A = Acceptable - reported result falls within ratio limits of 0.80-1.20 W = Acceptable with warning - reported result falls within 0.70-0.80 or 1.20-1.30 N = Not Acceptable - reported result falls outside the ratio limits of < 0.70 and > 1.30 (Page 2 of 6) 68
Month/Year Identification Number Matrix Nuclide Units TBE Reported Value Known Value (a)
Acceptance Range Evaluation (b)
February 2024 24-MaS50 Soil Fe-55 Bq/kg 297 650 455 - 845 N(3)
Ni-63 Bq/kg 1070 1530 1071 - 1989 N(4)
Tc-99 Bq/kg 325 336 235 - 437 A
Th-228 Bq/kg 34.6 48.8 34.2 - 63.4 W
Th-230 Bq/kg 49.7 54.0 38.0 - 70.0 A
Th-232 Bq/kg 36.4 45.1 31.6 - 58.6 A
24-MaSU50 Urine Cs-134 Bq/L 1.12 1.36 0.95-1.77 A
Cs-137 Bq/L 2.00 2.23 1.56-2.90 A
Co-57 Bq/L 1.06 1.26 0.88 - 1.64 A
Co-60 Bq/L 2.26 2.38 1.67 - 3.09 A
K-40 Bq/L
-1.80 NR Mn-54 Bq/L 1.44 1.51 1.06 - 1.96 A
U-234 Bq/L 0.00101 (1)
A U-238 Bq/L 0.00228 (1)
A Zn-65 Bq/L
-0.42 0.84 0.59-1.09 NE(5) 24-MaW50 Water Ni-63 Bq/L 0.338 0.80 (2)
A Tc-99 Bq/L 9.95 7.47 5.23 - 9.71 N(6) 24-RdV50 Vegetation Cs-134 Bq/sample 2.80 3.67 2.57 - 4.77 W
Cs-137 Bq/sample 2.21 2.57 1.80 - 3.34 A
Co-57 Bq/sample 2.23 2.53 1.77 - 3.29 A
Co-60 Bq/sample 2.42 2.96 2.07 - 3.85 A
Mn-54 Bq/sample 0.033 (1)
A Sr-90 Bq/sample 0.276 0.529 0.370 - 0.688 N(7)
Zn-65 Bq/sample 6.83 8.02 5.61 - 10.43 A
A.2 DOE's Mixed Analyte Performance Evaluation Program (MAPEP)
Teledyne Brown Engineering Environmental Services (Page 3 of 6) 69
(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 CAR 23-31 (4) See NCR 24-08 (5) Not Evaluated, re-reported as Falst Pos by MAPEP (6) See NCR 24-10 (7) See NCR 24-11 (Page 4 of 6)
August 2024 24-MaS51 Soil Fe-55 Bq/kg (8) 546-1014 N(9)
Ni-63 Bq/kg 1140.00 1015 - 1885 W
Tc-99 Bq/kg 155.00 780 1450.00 171.00 120 - 222 A
Th-228 Bq/kg 38.00 43.30 30.3 - 56.3 A
Th-230 Bq/kg 46.10 44.00 30.8 - 57.2 A
Th-232 Bq/kg 38.90 42.60 29.8 - 55.4 A
24-MaW51 Water Ni-63 Bq/L 0.60 (1)
A Tc-99 Bq/L 11.90 11.20 7.8 - 14.6 A
24-RdV51 Vegetation Cs-134 Bq/sample 3.12 2.89 2.02 - 3.76 A
Cs-137 Bq/sample 2.18 1.91 1.34 - 2.48 A
Co-57 Bq/sample 0.00 (1)
A Co-60 Bq/sample 2.24 2.01 1.41 - 2.61 A
Mn-54 Bq/sample 3.76 3.53 2.47 - 4.59 A
Sr-90 Bq/sample 0.95 2.39 1.67 - 3.11 N(10)
Zn-65 Bq/sample 10.30 9.13 6.39 - 11.87 A
Month/Year Identification Number Matrix Nuclide Units TBE Reported Value Known Value (a)
Acceptance Range Evaluation (b)
A.2 DOE's Mixed Analyte Performance Evaluation Program (MAPEP)
Teledyne Brown Engineering Environmental Services 70
Month/Year Identification Number Matrix Nuclide Units TBE Reported Value Known Value (a)
Acceptance Limits Evaluation (b)
March 2024 MRAD-40 Water Am-241 pCi/L 101 139 95.4 - 178 A
Fe-55 pCi/L 2185 2480 1460- 3610 A
Pu-238 pCi/L 62.0 70.4 42.3 - 91.2 A
Pu-239 pCi/L 61.2 76.5 47.3 - 94.3 A
Soil Am-241 pCi/kg NR 1880 1020 - 2660 Pu-238 pCi/kg 667 512 255 - 778 A
Pu-239 pCi/kg 562 545 297 - 784 A
Sr-90 pCi/kg 4050 3630 1130 - 5650 A
U-234 pCi/kg 3040 4360 2040 - 5710 A
U-238 pCi/kg 3270 4320 2370 - 5800 A
AP Am-241 pCi/filter 38.8 55.0 39.3 - 73.3 N(1)
Fe-55 pCi/filter 387 386 141 - 616 A
Pu-238 pCi/filter 45.9 41.1 31.0 - 50.5 A
Pu-239 pCi/filter 54.9 56.1 41.9 - 67.7 A
U-234 pCi/filter 11.1 11.6 8.60 - 13.6 A
U-238 pCi/filter 12.8 11.5 8.68 - 13.7 A
GR-A pCi/filter 116 95.9 50.1 - 158 A
GR-B pCi/filter 42.1 22.2 13.5 - 33.5 N(2)
April 2024 RAD-137 Water Ba-133 pCi/L 62.8 65.9 50.1 - 81.7 A
Cs-134 pCi/L 51.0 57.8 42.8 - 72.8 A
Cs-137 pCi/L 153 186 149 - 223 A
Co-60 pCi/L 92.1 98.8 79.7 - 118 A
Zn-65 pCi/L 208 240 188 - 292 A
GR-A pCi/L 35.2 52.6 39.6 - 65.6 N(3)
GR-B pCi/L 49 46.5 33.9 - 59.1 A
U-Nat pCi/L 56.0 59.3 52.8-65.8 A
H-3 pCi/L 19,000 21,300 18,200 - 24,400 A
Sr-89 pCi/L 48.9 52.2 37.8 - 66.6 A
Sr-90 pCi/L 32.6 37.6 32.0 - 43.2 A
I-131 pCi/L 21.8 25.1 21.7 - 28.5 A
September 2024 MRAD-41 Water Am-241 pCi/L 108.0 117.0 80.3-150 A
Fe-55 pCi/L 615 1230 723-1790 N(4)
Pu-238 pCi/L 99 103 61.9-133 A
Pu-239 pCi/L 123 133 82.3-164 A
Soil Am-241 pCi/kg 1320 1110 599-1570 A
Pu-238 pCi/kg 1380 1860 928-2830 A
Pu-239 pCi/kg 796 1030 561-1480 A
Sr-90 pCi/kg 3240 4730 1470-7370 A
A.3 ERA Environmental Radioactivity Cross Check Program Teledyne Brown Engineering Environmental Services (Page 5 of 6) 71
U-234 pCi/kg 2540 2860 1340-3750 A
U-238 pCi/kg 2390 2840 1560-3810 A
AP Am-241 pCi/filter 27.0 29.1 20.8-38.8 A
Fe-55 pCi/filter 644 800 292-1280 A
Pu-238 pCi/filter 22.3 21.5 16.2-26.4 A
Pu-239 pCi/filter 30.6 32.4 24.2-39.1 A
U-234 pCi/filter 14.0 31.1 23.1-36.4 N(5)
U-238 pCi/filter 14.2 30.9 23.3-36.9 N(5)
GR-A pCi/filter 80.0 72.4 37.8-119 A
GR-B pCi/filter 57.5 47.9 29.0-72.4 A
October 2024 RAD-139 Water Ba-133 pCi/L 30.3 27.4 15.5-39.3 A
Cs-134 pCi/L 73.3 80.2 63.0-97.4 A
Cs-137 pCi/L 46.6 46.3 23.3-69.3 A
Co-60 pCi/L 44.2 45.3 31.6-59.0 A
Zn-65 pCi/L 104 114.0 75.0-153 A
GR-A pCi/L 47.6 51.7 38.9-64.5 A
GR-B pCi/L 44.2 48.1 35.2-61.0 A
U-Nat pCi/L 28.3 26.90 23.6-30.2 A
H-3 pCi/L 4,690 5,320 3870-6770 A
Sr-89 pCi/L 57.5 44.2 30.6-57.8 A
Sr-90 pCi/L 37.3 35.6 30.2-41.0 A
I-131 pCi/L 28.3 26.3 22.7-29.9 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 24-02 (2) See NCR 24-03 (3) See NCR 24-05 (4) See NCR 24-15 (Page 6 of 6) 72