Text

Annual Radiological Environmental Operating Report for 2021
	ML22117A210
Person / Time
Site:	Summer
Issue date:	04/27/2022
From:	Haselden R; Dominion Energy South Carolina
To:	; Document Control Desk, Office of Nuclear Reactor Regulation
References
	22-135
	Download: ML22117A210 (87)
	v • d • e

V.C. Summer Nuclear Station Bradham Blvd & Hwy 215, Jenki nsvill e, SC 29065

~ Dominion Mailing Address: ~ Energy P.O. Box 88, Jenkinsvi ll e, SC 29065 DominionEnergy.com April 27, 2022 ATTN: Document Control Desk Serial No.22-135 U. S. Nuclear Regulatory Commission LIC/TS/R0 Washington, D. C. 20555-001 Docket No. 50-395 License No. NPF-12 DOMINION ENERGY SOUTH CAROLINA, INC. (DESC)

VIRGIL C. SUMMER NUCLEAR STATION UNIT 1 DOCKET NO. 50-395 OPERATING LICENSE NO. NPF-12 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT Enclosed is the DESC Annual Radiological Environmental Operating Report as required by Section 6.9.1.6 of the Virgil C. Summer Nuclear Station Technical Specifications.

If there are any questions, please call Ms. Tracey Stewart at (803) 931-5663.

Sincerely, Robin R. Haselden Director, Nuclear Station Safety and Licensing V. C. Summer Nuclear Station Commitments contained in this letter: None Enclosure cc: w/o Enclosure unless noted G. J. Lindamood - Santee Cooper L. Dudes - NRG Region II (w/Enclosure)

G. Miller - NRG Project Manager NRG Resident Inspector (w/Enclosure)

ANI (w/Enclosure)

Anu Nair - SCDHEC- Bureau of Environmental Health Services (w/Enclosure)

~ Dominion

iii' Energy ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT VIRGIL C. SUMMER NUCLEAR STATION FOR THE OPERA TING PERIOD JANUARY 1, 2021 - DECEMBER 31, 2021

.1.3J7L Brett Williams, Specialist Health Physics Timothy Riley, Superintendent

~k-:-

Todd Ellison, Manager Health Physics Technical Services Radiological Protection and Chemistry

EXECUTIVE

SUMMARY

This Annual Radiological Environmental Operating Report describes the V.C. Summer Environmental Monitoring Program and the program results for the calendar year 2021.

Included are the identification of sample locations, descriptions of environmental sampling and type of analysis. Comparisons of present environmental radioactivity levels and preoperational environmental data, land use census evaluation, doses calculated from environmental measurements, and a summary of environmental radiological sampling results are presented. Quality assurance practices, sampling deviations and unavailable samples are also discussed.

Sampling activities were conducted as prescribed by the Offsite Dose Calculation Manual (ODCM) for V.C. Summer Nuclear Station (VCSNS) and applicable Health Physics Procedures. Required analyses were performed and detection limits met for required samples with deviations noted. Samples were collected comprising one thousand two hundred sixty five analyses (1,265) performed to compile the data for the 2021 Environmental Report.

Supplemental samples comprising two hundred ninety-eight (298) analyses were performed on some media for additional information. Based on the results from the annual land use census, the current number of sampling sites for V.C. Summer Nuclear Station is sufficient.

Radionuclides observed in the environment in 2021 from V.C. Summer effluent releases were within the range of concentrations observed in the past. Radiation dose calculated from sample results is less than observed with normal fluctuation in natural background. It is therefore concluded that VCSNS operations have no significant radiological impact on the health and safety of the public or the environment.

TABLE OF CONTENTS PAGE INTRODUCTION 1 DESCRIPTION OF THE RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 2 LAND USE CENSUS 4 MONITORING RESULTS AND DISCUSSION 4 CONCLUSION 7 ii

LIST OF TABLES TABLE PAGE 1 Monitoring Methods for Critical Radiation Exposure 3 Pathways 2 Required Sampling Site Locations 8 3 Results of the 2021 Land Use Census Verification 11 4 Critical Receptor Evaluation for 2021 12 5 Radiological Environmental Monitoring Program 13 Specifications 6 Supplemental Radiological Environmental Monitoring 18 7 Radiological Environmental Monitoring Program Summary 22 for 2021 8 Radiological Environmental Monitoring Program 28 Preoperational (Baseline) Summary 9 Results of 2021 Environmental Inter-Comparison Program 33 with Independent Lab, Eckert & Ziegler Analytics, Inc.

10 2021 Environmental Sampling Program Deviations 35 iii

LIST OF FIGURES FIGURE 1-1 Control Site Locations (50 mile radius around the Virgil C. Summer Nuclear Station) 1-2 Radiological Monitoring Program Local Indicator Sample Sites (5 mile radius around Virgil C. Summer Nuclear Station) 1-3 Radiological Monitoring Program Local Indicator Sample Sites (1 mile radius around Virgil C. Summer Nuclear Station) 1-4 Radiological Monitoring Program Security Area Ground Water Sites.

1-5 Radiological Monitoring Program Protected Area Ground Water Sites and Independent Spent Fuel Storage Installation (ISFSI).

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INTRODUCTION Virgil C. Summer Nuclear Station (VCSNS) utilizes a pressurized water reactor rated at 2900 MWt (990 MWe gross). The station is located adjacent to the Monticello Reservoir near Jenkinsville, South Carolina and approximately 26 miles northwest of Columbia.

VCSNS achieved initial criticality on October 22, 1982, reached 50% power December 12, 1982 and 100% power June 10, 1983 following steam generator feed water modifications.

Steam generators were replaced in the fall of 1994. During the ninth refuel the plant was uprated to 2900 MWt (990 MWe gross). VCSNS is currently operating in the 27th fuel cycle.

VCSNS is operating in conjunction with the adjacent Fairfield Pump Storage Facility (FPSF) which consists of eight reversible pump-turbine units of 60 MWe capacity each.

During periods of off-peak power demand, base load generating capacity is used to pump water from Parr Reservoir to Monticello Reservoir. Monticello Reservoir has a surface area of approximately 6800 acres and lies about 150 feet above Parr Reservoir whose full pool area is approximately 4400 acres. The pump-turbine units operate in the generating mode to meet peak system loads while Monticello Reservoir also provides condenser cooling water for VCSNS. Cooling water intake and discharge structures are separated by a jetty to ensure adequate circulation within the reservoir.

VCSNS is located in Fairfield County which, along with Newberry County, makes up the principal area within a 10 mile radius of the plant. This area is mainly forest with only about 30% devoted to small farming activities principally producing small grains, feed crops and beef cattle. Significant portions of Lexington and Richland Counties are encompassed within the 20 mile radius of the plant and exhibit similar agricultural activities. Columbia, the state capital, is the only large city within the 50 mile radius of the plant. Small agricultural concerns are predominant but make up less than 50% of the land area. The main industrial activity is concentrated around Columbia and is generally greater than 20 miles from the VCSNS.

Liquid effluents from VCSNS are released into the Monticello/Parr Reservoirs at two discharge points: the Circulating Water Discharge Canal (CWDC) and the FPSF Penstocks.

Non-nuclear drains are released to the CWDC. Effluent from the liquid waste processing system and processed steam generator blow down are released through the penstocks.

Radioactive gaseous effluents from VCSNS are released from two points: the Main Plant Vent and the Reactor Building Purge Exhaust, all considered ground level releases.

In 2012 construction began on the Independent Spent Fuel Storage Installation (ISFSI), and concluded in January 2016. The first dry cask storage campaign began March 26, 2016 and finished in the first week of May 2016. Four casks were loaded during this evolution. Additional campaigns in the second quarter of 2019 and first quarter of 2022 have added eight casks for a total of twelve.

Radioactive liquid and gaseous releases from the facility and their potential influence on the surrounding biota and man are the primary concern of the Radiological Environmental Monitoring Program at VCSNS. This report summarizes the results of the Radiological Environmental Monitoring Program conducted during 2021. Data trends, control/indicator and preoperational/operational data, inter-comparisons, and other data interpretations are presented.

DESCRIPTION OF THE RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM The Radiological Environmental Monitoring Program is carried out in its entirety by Dominion Energy South Carolina. The program has been designed to meet the following general commitments:

1. To analyze selected samples in important anticipated pathways for the qualification and quantification of radionuclides released to the environment surrounding VCSNS.

2. To establish correlations between levels of environmental radioactivity and radioactive effluents from VCSNS operation.

The program utilizes the concepts of control/indicator and preoperational /operational inter-comparisons in order to evaluate the adequacy of radioactivity source control and to realistically verify the assessment of environmental radioactivity levels and subsequent radiation dose to man.

Sample media and analysis sensitivity requirements have been established to ensure that the maximum dose pathways are monitored and sensitivities represent a small fraction of annual release limits. These required Lower Limits of Detection (LLD's) are verified to have been met by calculating Minimum Detectable Activity (MDA) for each sample based on actual counting parameters relevant to each sample. In all cases the achieved MDA was lower than the LLD. Effluent dispersion characteristics, demography, hydrology and land use have been considered in selection of environmental sampling locations. These criteria were used to establish both the preoperational and operational phases of the Radiological Environmental Monitoring Program. Elements of the program monitor the impact of both gaseous and liquid effluents released from VCSNS.

Specific methods used in monitoring the pathways of these effluents which may lead to radiation exposure of the public, based on existing demography, are summarized below in Table 1. Requirements of the Radiological Environmental Monitoring Program are specified in the VCSNS Offsite Dose Calculation Manual (ODCM).

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Table 1 - Monitoring Methods for Critical Radiation Exposure Pathways Effluent Release Exposure Pathway Monitoring Media Type Gaseous Immersion Dose and Thermoluminescent Dosimetry other External Dose (TLD) Area Monitoring, Air Sampling, Vegetation (Ingestion) Vegetation and Food Crop Sampling, Milk (Ingestion) Milk Sampling, Grass (Forage)

Sampling Liquid Fish (Ingestion) Fish Sampling, Water & Shoreline Surface Water Sampling, Ground Exposure (Ingestion and Water Sampling, Shoreline and Immersion) Bottom Sediment Sampling, Drinking Water Drinking Water Sampling (Ingestion)

Monitoring sites indicative of plant operating conditions are generally located within a 5 mile radius of the plant. Table 5 provides a list of ODCM required sampling locations.

Table 6 provides a list of supplemental sampling locations. Maps showing radiological environmental sampling locations within a radius of approximately 5 miles from VCSNS are presented as Figures 1-2 through 1-5. Figure 1-1 shows monitoring sites at distances greater than 10 miles from the plant. Background radiation levels vary across the monitored area of interest.

In addition to pre-operational/operational data inter-comparisons, control/indicator data inter-comparisons are utilized. This is done to assess the probability that any observed abnormal measurement of radioactivity concentration is due to random or regional fluctuations rather than to a true increase in local environmental radioactivity concentration.

Environmental data is gathered through multiple types of sampling and measurements at specific locations. Several multiple sampling combinations are in use around the VCSNS. For example, all air sampling locations serve as environmental dosimetry monitoring locations. At these locations, airborne plant effluents are monitored for gamma immersion dose (noble gases), in addition to air contaminants. Monitoring locations Site 6 (1.0 mile ESE) and Site 7 (1.0 mile E) have broadleaf vegetation gardens for monitoring gaseous effluent deposition (ingestion pathway) in the two sectors having the highest deposition coefficients (D/Q) with real potential for exposure. Monitoring location Site 18 (16.5 miles S) serves as a control location for direct radiation and Site 40 (11.9 miles SSE) serves as a control location for garden monitoring.

Liquid effluents are monitored using three different monitoring media (fish, bottom sediment, and surface water) at the two most probable affected bodies of water around the plant: Site 21, Parr Reservoir (2.7 miles SSW) and Site 23, Monticello Reservoir (0.5 miles ESE). The control location for liquid effluent comparisons is at Site 22, Neal Shoals (26.0 miles NNW) on the Broad River.

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Quality of analytical measurements is demonstrated by participation in a laboratory inter-comparison program. Results of the inter-comparison program with an outside vendor and VCSNS Count Room were satisfactory in 2021 with the exception of an Alpha/Beta in Liquid analysis. Results are summarized in Table 9. The results of each of these quality control checks of the Radiological Environmental Monitoring Program verify the technical credibility of analytical data generated and reported by the program.

LAND USE CENSUS Annually a land use census is performed within a 5 mile radius of VCSNS to verify the appropriate siting of sample locations. In addition, the location of the maximum exposed individual (MEI) is identified to ensure the appropriate location is used for calculation of offsite dose impact from Summer Station gaseous effluents. The results of the land use census performed in 2021 are included in Table 3. A verification of the maximum exposed individual location is presented in Table 4. Identification of the highest offsite dose locations was performed by calculating a hypothetical dose based on source term from the Operating License Environmental Report and 2021 meteorological data. Exposure pathways modeled in the analysis were those identified during the land use census.

The location and pathway presently used in the ODCM for offsite organ dose calculations (E 1.1 miles - residence/garden) was found to have the highest calculated dose.

In addition, the ODCM required environmental gardens (ESE 1.0 and E 1.0 miles) were found to have calculated doses higher than any real receptor. There were no milking animals or dairy activity found within 5 kilometers of VCSNS. Therefore, changes to the ODCM gaseous effluent calculations or garden sample locations are not indicated.

MONITORING RESULTS AND DISCUSSION The results of the Radiological Environmental Monitoring Program for 2021 are summarized in Table 7. For comparison, preoperational data are summarized in Table 8.

The Radiological Environmental Program attained a program compliance rate of approximately 99.4%. A listing of program deviations and their respective causes are included in Table 10. Analysis of the impact of these omissions verified that program quality has not been affected.

Corbicula harvest for possible human consumption was observed in Lake Monticello in 2005. Since that time Corbicula analysis has been incorporated in the Supplemental Sampling Program. Samples were collected and analyzed for gamma emitting isotopes. No gamma emitting nuclides were detected.

Gross beta activities measured in air particulate samples collected at indicator locations around VCSNS were consistent with preoperational levels and not statistically significant from control locations. The highest site-specific mean activity (2.36E-2 pCi/m 3) was measured at indicator location Site 30 (Construction Site Gate 0.5 miles SSW). The results indicate that the operation of VCSNS has not contributed to detectable increases of airborne gross beta activity in the environment.

Gamma spectroscopy measurements of composited air particulate samples and activated charcoal cartridges support the gross beta activity trend. Only natural background 4

activities were detected. The highest MDA values at indicator locations for 134 Cs, 137Cs and 131 1were 2.29E-3, 2.57E-3 and 1.67E-2 pCi/m 3 , respectively and all met program analytical requirements for detection capability. Air sample collection rate for indicator/control air samples was 99%.

Environmental dosimetry measurements did not indicate any significant increase from preoperational measurements or previous historic average. Monitoring location Site 55 (St.

Barnabas Church 2.8 miles E) was the indicator location showing the highest mean exposure rate of 1.1 0E+1 µR/hr. This value is consistent with the highest mean exposure rate of 1.40E+1 µR/hr measured during the preoperational period.

The impact of Independent Spent Fuel Storage Installation (ISFSI) operation, located within the VCSNS Protected Area, which began cask storage on March 26, 2016, was assessed using six TLD locations monitoring the perimeter of the ISFSI site. The TLD locations were monitored for three quarters prior to fuel storage and continued to be monitored through 2021 during which fuel storage casks were stored.

Analysis of monitoring results show a statistically significant increase in ISFSI perimeter dose as a result of fuel storage. The highest location shows an increase of 7.3 mrem/calendar quarter compared to pre-operation. Although the applicable limit for a member of the public applies to a real individual, a conservative analysis was used to demonstrate compliance with 40CFR 190 and 10CFR72.104 by assuming an individual is located at the perimeter of the ISFSI Protected Area for 2000 hours0.0231 days 0.556 hours 0.00331 weeks 7.61e-4 months per year. In this case, the hypothetical individual would have received 6.6 mrem. This level of exposure would be well under the 40CFR190 limit of 25 mrem.

TLD sample collection rate for all indicator/control locations was 99.4%.

Gamma spectroscopy measurements of surface water samples did not indicate the presence of activated corrosion or fission products above the respective MDA for indicator sites. Tritium analysis did not indicate the presence of tritium above the respective MDA for indicator sites. Sample collection rate for all indicator/control surface water samples was 100%.

Gamma spectroscopy measurements of the ODCM required ground water samples did not indicate the presence of activated corrosion or fission products above the respective MDAs. Tritium was detected within the site boundary at Site 123 (NPDES Well GW-16 0.34 miles SSE), in four quarterly samples at concentrations of 2.25E+3 pCi/L, 2.63E+3 pCi/L, 2.02E+3 pCi/L, and 1.99E+3 pCi/L. GW-16 is a shallow supplemental monitoring site used to monitor for chemical contaminants around the Industrial and Sanitary Waste Treatment System. If this ground water represented a credible exposure pathway, maximum dose projection assuming consumption of 730 liters per year would result in a dose that does not exceed 0.25 mrem. These levels are substantially less than the 2.00E+4 pCi/L drinking water standard. Sample collection rate for indicator/control ground water samples was 100%.

Gamma spectroscopy measurements of drinking water samples collected from Site 28 (Jenkinsville water supply) and Site 17 (Columbia Water Works 25.0 miles SE) did not indicate the presence of activated corrosion or fission product activity above the respective MDAs. Tritium analysis did not indicate the presence of tritium above the respective MDA 5

for indicator sites. Sample collection rate for all indicator/control surface water samples was 100%.

There were no milk samples collected in 2021. Milk sampling is required to be performed at the three highest dose locations within 5 kilometers of the plant or at 5 to 8 kilometers of the plant if doses are calculated to be greater than 1 mrem/year. Presently there are no locations meeting these criteria for indicator dairies. The closest dairy is approximately 7 kilometers from the plant (see Table 3). Milk samples will be obtained from this dairy if gaseous releases from the plant exceed 5% of quarterly organ dose limits or radionuclides (attributed to the operation of VCSNS) are detected in broadleaf vegetation, grass or air samples at concentrations greater than required LLDs.

Gamma spectroscopy measurement of supplemental grass samples collected indicated 137Cs in 6 of 12 samples at Site 2 (transmission line 1.2 miles SW) at concentrations ranging from 1.31 E+1 pCi/kg to 1.04E+2 pCi/kg. The maximum preoperational control activity was 3.40E+2 pCi/kg. Sample collection rate for indicator/control supplemental grass was 100%.

Gamma spectroscopy measurements were performed on supplemental grass and soil samples collected in response to a liquid effluent spill in 2011 at Site 25 (Fairfield Pump Storage Remediation Area 0.9 miles WNW). None of the grass samples collected indicated the presence of activated corrosion or fission products above the respective MDAs. A soil sample did indicate 137Cs at a concentration of 3.06E+1 pCi/kg.

Gamma spectroscopy measurements of the broadleaf samples collected did not indicate the presence of activated corrosion or fission products above the respective MDAs.

All required indicator/control broadleaf samples were collected.

Gamma spectroscopy measurements of all non-leafy (other vegetation) supplemental samples collected did not indicate the presence of activated corrosion or fission products above the respective MDA.

Gamma spectroscopy measurements of fish samples collected did not indicate the presence of activated corrosion or fission products above the respective MDA. All required indicator/control fish samples were collected.

Gamma spectroscopy measurements of sediment samples collected did not indicate the presence of activated corrosion or fission products above the respective MDA for indicator sites. 137 Cs was detected in 1 of 2 control samples taken at Site 22 (Neal Shoals 26 miles NNW) ata concentration of4.16E+1 pCi/kg. Two samples from Supplemental Site 72 (Yard Drain Outfall 0.4 miles SE) also indicated 137 Cs at concentrations of 1.51 E+1 pCi/kg and 1.7E+1 pCi/kg. Historically 137Cs levels at the control site have ranged from 1.8E+1 pCi/kg to 1.0E+3 pCi/kg. All required indicator/control sediment samples were collected.

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CONCLUSION As in previous years of VCSNS operation, the presence of fission product activity attributed to residual fallout from atmospheric weapons testing and the Chernobyl accident were detected in environmental media including sediment and grass.

No detectable fission or activation product activity attributed to VCSNS operations was observed in environmental media with the exception of:

Tritium in supplemental ground water samples taken at Site 123 (NPDES Well GW-16 0.34 miles SSE) within the nuclear station, owner-controlled area.

The average natural background for direct exposure as determined from control locations is 73.2 mrem/year. The hypothetical calculated maximum exposure for drinking water from the NPDES well within the nuclear station owner-controlled area would be within the normal fluctuations of natural terrestrial and cosmic background. Dose at this level would not be expected to result in observable effects on the ecosystem or general public. The results of the Radiological Environmental Monitoring Program, therefore, substantiate the continuing adequacy of source control at VCSNS and conformance of station operation to 10CFR50, Appendix I design objectives.

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Table 2 - Required Sampling Site Locations Site Distance 1 Description Direction 2 Sample Type(s) 3 No. (Miles) 1 Borrow Pit 1.2 179.8 S DQ 2 Transmission Line 1.2 225.0 SW AP, RI, DQ 3 Firing Range 1.2 270.0 W DQ 4 Fairfield Hydro 1.2 289.5 WNW DQ 5 Transmission Line Entrance 0.9 144.0 SE DQ 6 Environmental Lab Garden 1.0 111.0 ESE AP,Rl,GA,DQ,GW 7 Environmental Lab Garden 1.0 97.8 E AP,Rl,DQ, GA 8 Monticello Res. S of Rd 224 1.5 62.0 ENE DQ 9 Ball Park 2.3 41.6 NE DQ 10 Meteorological Tower #2 2.5 25.5 NNE DQ 12 Old Hwy 99 4.2 349.4N DQ 13 North Dam 2.9 333.0 NNW DQ 14 Dairy (Shealy) 4 6.5 277.0W MK,GR 16 Dairy (Parr) 4 20.0 275.5 W MK,GR 16a TLD Location 28.0 278.6W DQ 17 Columbia Water Works 25.0 144.0 SE AP,Rl,DQ,DW 18 Pine Island Club 16.5 165.0 S DQ 19 Residence/Little Saluda 21.0 224.0 SSW DQ 20 Residence/Whitmire 22.0 309.5 NW DQ 21 Parr Reservoir 2.7 199.5 SSW SW,FH,BS 22 Neal Shoals 26.0 343.1 NNW SW,FH,BS 23 Discharge Canal (Mont, Res.) 0.5 104.5 ESE SW,FH,BS 26 On Site Well (P2) 460 Ft 270.0W GW 27 On Site Well (P5) 510 Ft 180.0 S GW 28 Jenkinsville Post Office 2.8 170.2 SE DW 29 Trans. Line WSW of VCSNS 1.0 260.6WSW DQ 30 Oak Tree North of Borrow Pit5 1.0 / 0.5 196.2 SSW DQ, AP, RI 31 McCrorev-Liston School 6.6 11.5 NNE DQ 32 Clark Bridqe Road and Brooks Drive 4.6 24.0 NNE DQ 33 Rd 48 near Hwy 213 4.2 68.0 ENE DQ 34 Rd 419 North of Hwy 60 4.9 111.0 ESE DQ 35 Glenn's Bridqe Road 4.6 132.0 SE DQ 36 Woods at Jenkinsville Post Office 3.1 151.0 SSE DQ 37 Residence 4.9 304.8 NW DQ 39 Lake Murray Water Treatment Facility 14.0 168.0 SSE DW 40 Emergency Operations Facility6 11.9 157.0 SSE GA,GR 41 Below Catwalk at Trestle 3.8 182.0 S DQ 42 Broad River Rd (Peak Residence) 3.8 198.0 SSW DQ 43 Hwy 176 and Rd 435 5.2 236.0 SW DQ 44 Rd 28 at Cannon's Creek 2.8 256.6WSW DQ 45 Rd 33 at Pomaria 5.8 253.2WSW DQ 46 Rd 28 at Heller's Creek 3.7 291.5WNW DQ 47 Fairfield Tailrace 1.0 316.0 NW DQ 8

Table 2 (cont) - Required Sampling Site Locations Site Distance 1 Description Direction 2 Sample Type(s) 3 No. (Miles) 52 Monticello (Rd 11) 3.8 13.0 NNE DQ 53 Rd 359 3.0 46.5 NE DQ 54 Jenkinsville School 1.7 72.5 ENE DQ 55 St. Barnabas Church 2.8 91.5 E DQ 56 Old Jenkinsville Dinner 2.0 144.0 SE DQ 58 Residence 2.5 157.0 SSE DQ 59 New Nuclear Deployment 2.6 170.2 SSE DQ,GW 60 Rd 98 near Rd 28 3.5 274.6W DQ 78 ISFSI - North 0.14 133 NW DQ 79 ISFSI - North East 266 Ft 102WNW DQ 80 ISFSI - South East 256 Ft 61 WSW DQ 81 ISFSI - South 0.10 63WSW DQ 82 ISFSI -South West 0.15 91 W DQ 83 ISFSI - North West 0.15 104WNW DQ 101 Remediation Well (B-2) 300 Ft NNW GW 102 Remediation Well (B-6) 400 Ft NE GW 103 Remediation Well (DW-13) 80 Ft NE GW 106 Remediation Well (DW-7) 250 Ft SE GW 108 Remediation Well (DW-19) 250 Ft w GW 110 Remediation Well (B-36) 300 Ft NW GW 112 NPDES Well (GW-9) 0.36 331 SSE GW 113 NPDES Well (GW-12) 0.33 332 SSE GW 114 NPDES Well (GW-13A) 0.39 317 SE GW 9

Table 2 (cont) - Required Sampling Site Locations Footnotes

1. Distance given is the distance between the site location and the VCSNS reactor containment building.

2. Direction given in degrees from true north-south line through center of reactor containment building.

3. Sample Types:

AP= Air Particulate GW = Ground Water GA= Garden RI = Air Radioiodine DW = Drinking Water FH = Fish DQ = Quarterly TLD MK= Milk BS = Bottom Sediment SW = Surface Water GR= Grass (Forage)

4. Sites 14 and 16 are not presently in use. If conditions change, requiring a renewal of dairy sampling these sites will be reactivated.

5. Site 30 consists of two locations in the same sector. The air sampler is located 0.5 miles from the reactor to support construction of a new facility. The TLD is located 1.0 mile from the reactor in the same sector.

6. Site 40 (11.9 miles SSE) serves as a control location for garden monitoring which is the location of the Station's Emergency Operating Facility.

Table 3 - Results of the 2021 Land Use Census Verification NEAREST NEAREST NEAREST No. NEAREST No.

SECTOR RESIDENCE MILES GARDEN MILE~ CATTLE MILKE[ MILES GOAT MILKED MILES N P. Oliver 3.73 NNE Thomas Crumblin 2.96 NE Gregory Guinyard 1.5 ENE Bessie Gregg 1.53 E Roy Mcadory 1.18 ESE Carrie Lee Martin 1.04 SE Mary White 1.44 10845 SC-215 (B) 2.4 SSE Ronnie Mann 2.39 s Kelly Boulware 3.54 SSW Hope Carter 3.02 SW William Waldrop 2.84 2307 Broad River Rd (B) 3.31 WSW 243 Peak Rd 3.25 2068 Peak Rd (C) 0 4.82 w 4608 Broad River Rd 2.73 4608 Broad River Rd (C) 0 2.43 w Meyer Windnill Rd 2.49 Graham Dairy 4.82 WNW CC Mann 2.59 NW Louise Workman 3.86 NNW Frank March 2.86 (A) Change In Closest Residence (B) Change In Closest Garden (C) Change In Closest Beef Cattle (D) Change In Closest Goat 11

Table 4 Critical Receptor Evaluation for 2021 NAME SECTOR MILES PATHWAY X/Q D/Q DOSE*

mRem/y P. Oliver N 3.73 Res 2.18E-07 5.75E-10 8.09E-03 T. Crumblin NNE 2.96 Res 4.68E-07 1.44E-09 1.75E-02 G. Guinyard, Jr. NE 1.5 Res 2.66E-06 8.49E-09 9.96E-02 B. Gregg ENE 1.53 Res 2.09E-06 6.20E-09 7.79E-02 Garden 7 E 1 Res, Gar 3.83E-06 1.23E-08 3.33E+00 R. Mcadory E 1.18 Res 2.57E-06 8.03E-09 9.60E-02 Garden 6 ESE 1 Res, Gar 2.71E-06 8.08E-09 2.22E+00 C. L. Martin ESE 1.04 Res 2.46E-06 7.29E-09 9.18E-02 M. White SE 1.44 Res 8.03E-07 3.26E-09 3.04E-02 10845 SC-215 Residence (B) (D) SE 2.4 Res, Gar 2.65E-07 9.48E-10 2.54E-01 R. Mann SSE 2.39 Res 1.15E-07 8.46E-10 4.55E-03 K. Boulware s 3.54 Res 6.23E-08 5.65E-10 2.52E-03 H. Carter SSW 3.02 Res 7.91E-08 9.10E-10 3.29E-03 W. Waldrop SW 2.84 Res 8.98E-08 1.25E-09 3.85E-03 2307 Broad River Rd (B) SW 3.31 Res, Gar 6.44E-08 8.78E-10 2.17E-01 243 Peak Rd WSW 3.25 Res 5.31E-08 5.31E-10 2.17E-03 2068 Peak Rd WSW 4.82 Res,B 2.317E-08 2.206E-10 2.28E-02 Maver Windmill Rd w 2.49 Res 1.15E-07 9.02E-10 4.57E-03 Graham Dairv w # Res, C/M # # 1.80E-01 4608 Broad River Rd w # Res, B # # 9.85E-02 CC Mann WNW 2.59 Res 6.88E-08 3.31E-10 2.63E-03 L. Workman NW 3.86 Res 6.68E-08 2.41E-10 2.51E-03 F. March NNW 2.86 Res 2.95E-07 8.22E-10 1.10E-02 ODCM Organ Dose E 1.1 Res, Gar 3.04E-06 9.60E-09 2.61E+00 Pathway Res = Residence B = Beef G = Goat Gar= Garden C/M = Cow/Milk(lnfant) G/M = Goat/Milk(lnfant)

Footnotes:

Maximum exposed individual.

Hypothetical dose based on Operating License Environmental Report Source Term.

- ODCM required environmental gardens.

Multiple receptor distances/pathways used for total dose to receptor 12

Table 5 - Radiological Environmental Monitoring Program Specifications Exposure Criteria for Selection of Sampling and Collection Sample Type & Frequency of Pathway and/or Sample Number & Location Frequency Location Analysis Sample AIRBORNE:

I. Particulate A) 3 Indicator samples from Continuous sampler operation 2 Gross beta following filter locations close to the site with weekly collection. 7 change; Quarterly boundary, in different 30 composite (by location) sectors, of the highest for gamma isotopic.

calculated annual average ground level DIQ or dose. 2 B) 1 Indicator sample to be Continuous sampler operation 6 Gross beta following filter taken close to the site with weekly collection. change; Quarterly boundary in the sector composite (by location) corresponding to the for gamma isotopic.

residence having the highest anticipated offsite ground level concentration or dose. 2 C) 1 Indicator sample to be Continuous sampler operation NIA Gross beta following filter taken at the location of one with weekly collection. change; Quarterly of the dairies being composite (by location) sampled meeting the for gamma isotopic.

criteria of Vll(A). 2.4 D) 1 Control sample to be Continuous sampler operation 17 Gross beta following filter taken at a location at least with weekly collection. change; Quarterly 10 air miles from the site composite (by location) and not in the most for gamma isotopic.

prevalent wind directions. 2 II. Radioiodine A) 3 Indicator samples to be Continuous sampler operation 2 Gamma Isotopic for taken at two locations as with weekly canister collection. 7 Iodine 131 weekly.

given in l(A) above. 30 B) 1 Indicator sample to be Continuous sampler operation 6 Gamma Isotopic for taken at the location as with weekly canister collection. Iodine 131 weekly.

given in l(B) above.

C) 1 Indicator sample to be Continuous sampler operation NIA Gamma Isotopic for taken at the location as with weekly canister collection. Iodine 131 weekly.

given in l(C) above.

D) 1 Control sample to be Continuous sampler operation 17 Gamma Isotopic for taken at a location similar with weekly canister collection. Iodine 131 weekly.

in nature to l(D) above.

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Exposure Criteria for Selection of Sampling and Collection Sample Type & Frequency of Pathway and/or Sample Number & Location Frequency Location Analysis Samole Ill. Direct A) 13 Indicator stations to Monthly or quarterly 1,2,3,4,5,6, Gamma dose monthly or form an inner ring of exchange5 *7 two or more 7,8,9, 10,29, quarterly.

stations in the 13 dosimeters at each location. 30,47 accessible sectors within 1 to 2 miles of the plant.

B) 16 indicator stations to form Monthly or quarterly 12,13,32,33, Gamma dose monthly or an outer ring of stations in exchange 5*7 two or more 34,35,36,37, quarterly.

the 16 accessible sectors dosimeters at each location. 41,42,43,44, within 3 to 5 miles of the 46,53,55,60 plant.

C) 11 Stations to be placed in Quarterly exchange 7 ; two or 16,17,18,19, Gamma dose quarterly.

special interest areas such more dosimeters at each 20,31,45,52, as population centers, location. 54,56,58 nearby residences, schools and in 4 or 5 areas to serve as controls.

D) 6 Stations to be placed Quarterly exchange7 ; two or 78,79,80,81, Gamma & neutron dose around the ISFSI more dosimeters at each 82,83 quarterly.

boundary. location.

WATERBORNE IV. Surface A) 1 Indicator sample Time composite samples6 with 21 3 Gamma isotopic monthly Water downstream to be taken at collection every month. 5 with quarterly composite a location which allows for (by location) to be mixing a dilution in the analyzed for tritium. 7 ultimate receiving river.

B) 1 Control sample to be Time composite samples 6 with 22 3 Gamma isotopic monthly taken at a location on the collection every month. 5 with quarterly composite (by location) to be receiving river sufficiently analyzed for tritium. 7 far upstream such that no effects of pumped storage operation are anticipated.

C) 1 Indicator sample to be Time composite samples 6 with 23 3 Gamma isotopic monthly taken in the upper reservoir collection every month. 5 with quarterly composite of the pumped storage (by location) to be facility at the plant analyzed for tritium. 7 discharge canal.

V. Ground Water A) 12 Indicator samples to be Quarterly grab sampling. 7 6, 26, 27, Gamma isotopic and taken within the exclusion 101-103, tritium analyses boundary and in the 106, quarterly.7 direction of potentially 108,110, affected ground water 112-114 supplies.

B) 1 Control sample from Quarterly grab sampling. 7 59 Gamma isotopic and unaffected location. tritium analyses quarterly.7 14

Exposure Criteria for Selection of Sampling and Collection Sample Type & Frequency of Pathway and/or Sample Number & Location Frequency Location Analysis Samole VI. Drinking A) 1 Indicator sample from a Monthly grab sampling. 5 28 Monthly5 gamma isotopic Water nearby public ground water and gross beta analyses supply source. and quarterly7 composite for tritium analyses.

B) 1 Indicator (finished water) Monthly composite sampling. 17 Monthly5 gamma isotopic sample from the nearest and gross beta analyses downstream water supply. and quarterly7 composite for tritium analyses.

C) 1 Control (finished water) Monthly composite sampling. 39 Monthly5 gamma isotopic sample from an unaffected and gross beta analyses water supply. and quarterly7 composite for tritium analyses.

INGESTION:

VII. Milk4 A) Samples from milking Semimonthly when animals To be Gamma isotopic and I-animals in 3 locations are on pastures, monthly other supplied 131 analysis within 5 km having the times. 5 when milk semimonthlys when highest dose potential. If animals are animals are on pasture, there are none then 1 found in monthly other times. 5 sample from milking accordance animals in each of 3 areas with criteria between 5 to 8 km distance VII.A.

where doses are calculated to be greater than 1 mrem per year. 10 B) 1 Control sample to be Semimonthly when animals 16 Gamma isotopic and I-taken at the location of a are on pastures, monthly other 131 analysis dairy > 20 miles distance times. 5 *11 semimonthlys when and not in the most animals are on pasture, prevalent wind direction. 2 monthly other times. 5 C) 1 Indicator grass (forage) Monthly when available. 5 To be Gamma isotopic.

sample to be taken at the supplied location of one of the when milk dairies being sampled animals are meeting the criteria of found in Vll(A), above, when accordance animals are on pasture. with criteria VII.A.

D) 1 Control grass (forage) Monthly when available. 5 *11 16 Gamma isotopic.

sample to be taken at the location ofVll(B) above.

15

Exposure Criteria for Selection of Sampling and Collection Sample Type & Frequency of Pathway and/or Sample Number & Location Frequency Location Analysis Sample VIII. Food A) 2 samples of broadleaf Monthly when available. 5 6 Gamma isotopic on edible Products vegetation grown in the 2 7 portion.

nearest offsite locations of highest calculated annual average ground level D/Q if milk sampling is not performed within 3 km or if milk sampling is not performed at a location within 5 to 8 km where the doses are calculated to be greater than 1 mrem/yr. 10 B) 1 Control sample for the Monthly when available. 5 40 Gamma isotopic on edible same foods taken at least portion.

1O miles distance and not in the most prevalent wind direction if milk sampling is not performed within 3 km or if milk sampling is not performed at a location within 5 to 8 km where the doses are calculated to be greater than 1 mrem/yr. 10 IX. Fish A) 1 Indicator sample to be Semiannual 9 collection. 1 23 3 Gamma isotopic on edible taken at a location in the portions semiannually. 9 upper reservoir.

B) 1 Indicator sample to be Semiannual 9 collection. 1 21 3 Gamma isotopic on edible taken at a location in the portions semiannually. 9 lower reservoir.

C) 1 Control sample to be Semiannual 9 collection. 1 22 3 Gamma isotopic on edible taken at a location on the portions semiannually. 9 receiving river sufficiently far upstream such that no effects of pumped storage operation are anticipated.

AQUATIC:

X. Sediment A) 1 Indicator sample to be Semiannual grab sample. 9 23 3 Gamma isotopic.

taken at a location in the upper reservoir.

B) 1 Indicator sample to be Semiannual grab sample. 9 21 3 Gamma isotopic.

taken on or near the shoreline of the lower reservoir.

C) 1 Control sample to be Semiannual grab sample. 9 22 3 Gamma isotopic.

taken at a location on the receiving river sufficiently far upstream such that no effects of pumped storage operation are anticipated.

16

Table 5 (cont) - Radiological Environmental Monitoring Program Specifications FOOTNOTES

1. Fish include 3 groups (Bass, Bream/Crappie, Catfish/Carp.)

2. Sample site locations are based on 5-year average meteorological analysis.

3. Though generalized areas are noted for simplicity of sample site enumeration, airborne, water and sediment sampling is done at the same location, whereas biological sampling sites are generalized areas in order to reasonably assure availability of samples.

4. Milking animal and garden survey results will be analyzed annually. If the survey should indicate new activity the owners shall be contacted with regard to a contract for supplying sufficient samples. If contractual arrangements can be made, site(s) will be added for additional milk sampling up to a total of three Indicator locations.

5. Not to exceed 35 days.

6. Time composite samples are samples which are collected with equipment capable of collecting an aliquot at time intervals which are short relative to the compositing period.

7. At least once per 100 days.

8. At least once per 18 days.

9. At least once per 200 days.

10. The dose shall be calculated for the maximum organ and age group, using the guidance/methodology contained in Regulatory Guide 1.109, Rev. 1 and the parameters particular to the site.

11. Milk and forage sampling at the control location is only required when locations meeting the criteria of Vll(A) are being sampled.

17

Table 6 - Supplemental Radiological Environmental Monitoring Exposure Pathway Criteria for Selection of Sampling and Sample Type & Frequency of and/or Sample Sample Number & Location Collection FreQuencv Location Analvsis AIRBORNE:

S-1. Particulate A) 1 Indicator sample Continuous sampler 8 Gross beta following monitoring the nearest operation with weekly filter change; Monthly community with the highest collection. Composite (by anticipated dose or ground location) for gamma level concentration. isotopic.

S-I1. Radioiodine A) 1 Indicator sample to be Continuous sampler 8 Gamma isotopic for taken from the location of operation with weekly 1-131 weekly.

S-1(A) above. collection.

S-111. Direct A) 5 stations to be placed Quarterly exchange 7 ; two 61,62,63, Gamma dose within the exclusion or more dosimeters at 68 & 99 quarterly.

boundary. each location.

8) 2 stations to be placed Quarterly exchange7 ; two 94,97 Gamma dose around VCSNS sludge or more dosimeters at quarterly.

lagoons. each location.

WATERBORNE:

S-IV. Surface A) 1 indicator sample to be Composite samples with 77 Gamma isotopic and Water taken of the combined monthly collection. 13*5 tritium.

wastewater discharge.

B) 1 Indicator sample taken at Daily sample with 72,73 Gamma isotopic and each storm drain outfall. monthly composite. tritium.

S-VI. Drinking A) 1 Indicator (finished water) Quarterly. 99 Quarterly gamma Water sample to be taken on site. isotopic, gross beta and tritium analysis.

8) 1 Indicator (finished water) Quarterly. 31 Quarterly gamma sample of public system. isotopic, gross beta and tritium analysis.

18

Exposure Pathway Criteria for Selection of Sampling and Sample Type & Frequency of and/or Sample Samole Number & Location Collection Freauencv Location Analysis INGESTION:

S-VII. Milk4 A) 1 Sample from one of the Biweekly grab 14 Gamma isotopic and nearest affected dairies at sample. 8 *14,+ 1-131 analysis or beyond 5 miles. biweekly.

8) 1 Control sample to be Biweekly grab 16 Gamma isotopic and taken at the location of a sample. 8 *14 *+ 1-131 analysis dairy greater than 20 miles biweekly.

distance and not in the most prevalent wind direction.

C) 1 Indicator grass (forage) Monthly when 14 Gamma isotopic.

sample to be taken at the available. 14 location of S-Vll(A) above.

D) 1 Control grass (forage) Monthly when 16 Gamma isotopic.

S-VII. Milk4 sample to be taken at the available. 14 location of S-Vll(B) above.

E) 2 Indicator grass (forage) Monthly when available. 2,7 Gamma isotopic.

samples to be taken at 2 of the locations beyond but as close to the exclusion boundary as practical where the highest offsite sectorial ground level concentrations are anticipated.

F) 1 Control grass (forage) Monthly when available. 40 Gamma isotopic.

sample to be used for routine monitoring along with S-Vll(E) above.

G) 1 Indicator grass (forage) Quarterly when available. 25 Gamma isotopic.

sample to be taken at location of penstock leak.

S-VIII. Food A) 1 Indicator sample of Annually during growing 6,7 Gamma isotopic on Products various types of foods season. 11 edible portion.

grown in the area surrounding the plant (root, fruit, grain).

B) 1 Control sample of various Annually during growing 40 Gamma isotopic on types of foods grown. (root, season. 11 edible portion.

fruit, grain).

Corbicula C) 1 Indicator sample of edible Semiannual. 23 Gamma isotopic.

portions.

19

Exposure Pathway Criteria for Selection of Sampling and Sample Type & Frequency of and/or Sample Sample Number & Location Collection Freauencv , Location Analvsis S-IX. Sediment/ A) 1 Indicator sample from Semiannually. 72,73 Gamma isotopic.

Sludge each storm drain outfall.

B) 3 Indicator sludge Semiannually. On site Gamma isotopic.

samples taken at sludge lagoons 006A, 0068 &

008.

C) 1 Indicator sample of Annually 25 Gamma isotopic.

topsoil from penstock spill area.

S-X. Ground Water A} 11 Indicator samples to be taken Quarterly grab sampling. 7 107,111, Gamma isotopic and within the exclusion boundary 115-123 tritium analyses and in the direction of potentially quarterly.7 affected ground water supplies.

20

Table 6 (cont) - Supplemental Radiological Environmental Monitoring FOOTNOTES

1. Reserved for future use.

2. Reserved for future use.

3. Reserved for future use.

4. Milking animal and garden survey results will be analyzed annually. If the survey should indicate new activity the owners shall be contacted with regard to a contract for supplying sufficient samples. If contractual arrangements can be made, site(s) will be added for additional milk sampling up to a total of 3 Indicator locations.

5. Not to exceed 35 days.

6. Reserved for future use.

7. At least once per 100 days.

8. At least once per 18 days.

9. At least once per 200 days.

10. Reserved for future use.

11. At least once per 400 days.

12. Reserved for future use.

13. Weekly, when circulating water is not operational.

14. Milk and grass (forage) sampling is not required unless VCSNS gaseous releases exceed 5% of quarterly organ dose limits or radionuclides (attributed to VCSNS operation) are detected in broadleaf vegetation, grass or air samples at concentrations greater than required LLD. Sampling should continue for two months after plant releases are reduced to less than trigger levels and milk contamination levels have returned to background levels.

+ The ODCM requires semimonthly sampling when animals are on pasture, monthly at other times.

21

Table 7 - Radiological Environmental Monitoring Program Summary for 2021 Location with Highest Annual Mean Number of Medium or Type and Total Lower Limit All Indicator Locations Control Locations Non routine Pathway Sampled Number of of Detection 2 Name Mean 3 (#/total #)

Mean 3 (#/total #) Mean 3 (#/total #) Reported 4 (Unit of Analyses Actual (Distance & Direction) (Range)

(Range) (Range) Measurements Measurement) Performed 1 (Max.)

Air Particulate Gross Beta 4.60E-3 2.31 E-2 (257/257) Site 30, Construction 2.36E-2 (52/52) 2.33E-2 (52/52) 0 (pCi/m 3) (309) (1.0E-2) (8.90E-3 to 5.01 E-2) Site Gate, (1.13E-2 to 4.63E-2) (1.11 E-2 to 5.05E-2)

(0.5 miles SSW}

Gamma Spec (72) 134Cs 2.29E-3 All< LLD All< LLD 0 (5.0E-2) 137Cs 2.57E-3 All< LLD All< LLD 0 (6.0E-2)

Air Radioiodine 131) (309) 1.67E-2 All< LLD All< LLD 0 (pCi/m 3) (7.0E-2)

Direct (TLD) 5 Gamma(135) 8.22E+0 (116/116) Site 55, St. Barnabas, 1.1 0E+1 (4/4) 8.36E+0 (19/19) 0

(µR/hr) Quarterly N/A (4.84E+0 to 1.14E+1) (2.8 miles E) (1.01E+1 to 1.14E+1) (4.54+0 to 1.19E+1)

Gamma(24) 8.75E+0 (24/24) Site 31, McCrory Liston, 1.14E+1 (4/4) N/A 0 Special Interest N/A (4.53E+0 to 1.21 E+1) (6.6 miles NNE) (1.08E+1 to 1.21E+1)

Surface Water 3H (36} 4.39+2 All< LLD All< LLD All< LLD 0 (oCill) (2.0E+3)

Gamma Spec(36) 54Mn 1.54E+0 All< LLD All< LLD 0 (1.5E+1) ssco 2.08E+0 All< LLD All< LLD 0 (1.5E+1) ssFe 3.98E+0 All< LLD All< LLD 0 (3.0E+1) eoco 1.66E+0 All< LLD All< LLD 0 (1.5E+1) eszn 3.25E+0 All< LLD All< LLD 0 (3.0E+1) sszr 2.84E+0 All< LLD All< LLD 0 (3.0E+1) ssNb 1.99E+0 All< LLD All< LLD 0 (1.5E+1) 134Cs 1.50E+0 All< LLD All< LLD 0 (1.5E+1) 22

Table 7 (cont.) - Radiological Environmental Monitoring Program Summary for 2021 Location with Hio hest Annual Mean Number of Medium or Type and Total Lower limit All Indicator Locations Control Locations Non routine Pathway Number of of Mean 3 (#/total #) Name Mean 3 (#/total #) Mean 3 (#/total #) Reported 4 Sampled (Unit of Analyses Detection2 (Range) (Distance & Direction) (Range) (Range) Measurements Measurement) Performed 1 Actual (Max.)

Surface Water 137Cs 1.75E+O All< LLD All< LLD 0 (Continued) (1.8E+1) 1408a 1.54E+1 All< LLD All< LLD 0 (6.OE+1) 140La 3.57E+O All< LLD All< LLD 0 (1.5E+1)

Ground Water 3H (52) 4.55E+2 All< LLD All< LLD 0 (pCi/1) 2.OOE+3 Gamma Spec (52) 54Mn 4.51E+O All< LLD All< LLD 0 (1.5E+1) ssco 3.48E+O All< LLD All< LLD 0 (1.5E+1) sgFe 6.O6E+O All< LLD All< LLD 0 (3.OE+1) soco 5.47E+O All< LLD All< LLD 0 (1.5E+1) sszn 7.52E+O All< LLD All< LLD 0 (3.OE+1) 95zr 6.51E+O All< LLD All< LLD 0 (3.OE+1) 95Nb 2.76E+O All< LLD All< LLD 0 (1.5E+1) 134Cs 3.92E+O All< LLD All< LLD 0 (1.5E+1) 137Cs 4.37E+O All< LLD All< LLD 0 (1.8E+1) 1408a 2.1OE+1 All< LLD All< LLD 0 (6.OE+1) 140La 4.22E+O All< LLD All< LLD 0 (1.5E+1) 23

Table 7 (Cont.) - Radiological Environmental Monitoring Program Summary for 2021 Location with Hi! hest Annual Mean Number of Medium or Type and Total Lower Limit All Indicator Locations Control Locations Non routine Pathway Number of of Mean 3 (#/total #) Name Mean 3 (#/total #) Mean 3 (#/total #) Reported4 Sampled (Unit of Analyses Detection 2 (Range) (Distance & Direction) (Range) (Range) Measurements Measurement\ Performed 1 Actual (Max.\

Drinking Water6 Gross Beta (36) 3.10E+0 3.44E+0 (11/24) Site 28, Jenkinsville 3.44E+0 (5/12) 2.31 E+0 (3/12) 0 (pCi/I) (4.00E+0) (2.60E+0 to 4.07+0) Post Office, (2.60E+0 to 3.94+0) (2.26E+0 to 2.37E+0)

(2.8 miles, SE) 3H (36) 4.33E+2 All< LLD All< LLD 0 (2.0E+3)

Gamma Spec (72) 9 S4Mn 2.57E+0 All< LLD All< LLD 0 (1.5E+1) ssco 1.94E+0 All< LLD All< LLD 0 (1.5E+1) sgFe 4.72E+0 All< LLD All< LLD 0 (3.0E+1) 6oco 2.71E+0 All< LLD All< LLD 0 (1.5E+1) sszn 4.26E+0 All< LLD All< LLD 0 (3.0E+1) 95zr 4.14E+0 All< LLD All< LLD 0 (3.0E+1) 9sNb 2.25E+0 All< LLD All< LLD 0 (1.5E+1) 1311 4.85E-1 All< LLD All< LLD 0 (1.0E+O) 134Cs 2.49E+0 All< LLD All< LLD 0 (1.5E+1) 137Cs 2.61E+0 All< LLD All< LLD 0 (1.8E+1) 1408a 1.31E+1 All< LLD All< LLD 0 (6.0E+1) 140La 4.04E+0 All< LLD All< LLD 0 (1.5E+1) 24

Table 7 (Cont.) - Radiological Environmental Monitoring Program Summary for 2021 Location with Hi hest Annual Mean Number of Medium or Type and Total Lower Limit All Indicator Locations Control Locations Nonroutine Pathway Number of of Mean 3 (#/total #) Name Mean 3 (#/total #) Mean 3 (#/total #) Reported 4 Sampled (Unit of Analyses Detection 2 (Range) (Distance & Direction) (Range) (Range) Measurements Measurement) Performed 1 Actual /Max.}

Broadleaf Gamma Spec Vegetation (36)

(oCi/ka wet) 131) 1.51E+1 All< LLD All< LLD 0 (6.0E+ 1) 134Cs 1.42E+1 All< LLD All< LLD 0 (6.0E+ 1) 137Cs 1.68E+1 All< LLD All< LLD 0 (8.0E+1)

Fish7 Gamma Spec (oCi/ka wet) (18) 54Mn 1.59E+1 All< LLD All< LLD 0 (1.3E+2) ssco 2.06E+1 All< LLD All< LLD 0 (1.3E+2) sgFe 3.19E+1 All< LLD All< LLD 0 (2.6E+2) soco 2.27E+1 All< LLD All< LLD 0 (1.3E+2) sszn 4.11E+1 All< LLD All< LLD 0 (2.6E+2) 134Cs 1.79E+1 All< LLD All< LLD 0 (1.3E+2) 137Cs 2.01E+1 All< LLD All< LLD 0 (1.5E+2) 25

Table 7 (Cont.) - Radiological Environmental Monitoring Program Summary for 2021 Location with Hi~ hest Annual Mean Number of Medium or Type and Total Lower Limit All Indicator Locations Control Locations Non routine Pathway Number of of Mean 3 (#/total #) Name Mean3 (#/total #) Mean 3 (#/total #) Reported 4 Sampled (Unit of Analyses Detection 2 (Range) (Distance & Direction) (Range) (Range) Measurements Measurement) Performed 1 Actual (Max.)

Sediment Gamma Spec (6)

(pCi/kr:1) 8 54Mn 1.31E+1 All< LLD All< LLD 0 N/A ssco 1.16E+1 All< LLD All< LLD 0 NIA soco 1.10E+1 All< LLD All< LLD 0 N/A 134Cs 7.38E+O All< LLD All< LLD 0 (1.5E+2) 137Cs 1.40E+1 All< LLD 4.16E+1 (1/2) 0 (1.8E+2) (4.16E+1 to4.16E+1) 26

Table 7 (cont) - Radiological Environmental Monitoring Program Summary for 2021 Footnotes

1. Includes indicator and control analyses. Site 8, Air Particulates and Air Radioiodines are included as indicators. Does not include other supplemental samples.

2. Values given are maximum MDA values for indicator locations calculated from the program data analyses. The maximum acceptable LLD values allowed from NRC guidelines are given in parentheses.

3. Mean and range are based on detectable measurements only. The fractions of detectable measurements (i.e., number of positive results/total number of measurements) at specific locations are indicated in parentheses.

4. Any confirmed measured level of radioactivity in any environmental medium that exceeds the reporting requirements of ODCM, Section 1.4.1.2.

5. Detection sensitivity is approximately 10 mrem/yr (1.0 µR/hr).

6. Elevated levels of 214 Pb and 214 Bi were observed in Jenkinsville drinking water samples.

The values are not reported here because they are naturally occurring (do not originate from VCSNS) and furnish no quantifiable information of interest.

7. Fish include 3 groups (Bass, Bream/Crappie, Catfish/Carp.)

8. Elevated levels of 214 Pb and 214 Bi plus other 226 Ra daughter products and 228Ac plus other 232 Th daughter products were observed in all sediment samples. The values are not reported here because they are naturally occurring (do not originate from VCSNS) and furnish no quantifiable information of interest.

9. Drinking water resin prepared and counted for 131 1 as separate sample.

27

Table 8- Radiological Environmental Monitoring Program Preoperational (Baseline) Summary Location with Hiahest Annual Mean Medium or Pathway Type and Total Number of Lower Limit of All Indicator Control Locations Sampled (Unit of Number of Name Mean 2 (#/total #) Non routine Detection 1 Actual Locations Mean 2 Mean 2 (#/total #)

Measurement and Analyses (Distance & Direction) (Range) Reported3 (Max.) (#/total#) (Range) (Range)

Reporting Period) Performed Measurements Air Particulate Gross Beta 4.1E-3 1.1 E-1 (562/564) 4 Site 13, North Dam, 1.3E-1 (52/52) 1.2E-1 (153/155) 0 (pCilm 3) (1300) (1.0E-2) (1.3E-2 to 5.5E-1) (2.9 miles, NNW) (2.1 E-2 to 5.5E-1) (7.9E-3 to 6.1E-1)

(1981-1982) 2.7E-2 (456/462)4 Site 8, Mon. Res. S of 3.0E-2 (42/42) 2.8E-2 (1251126)

(9.3E-3 to 6.6E-2) Rd 224, (1.5 ENE) (1.2E-2 to 6.0E-2) (1.2E-2 to 5.8E-2)

Gamma Spec (307) 134Cs 3.0E-3 All< LLD All< LLD 0 (1.0E-2) 137Cs 3.1E-3 3.2E-3 (221241) Site 10, Met Tower, 3.8E-3 (2122) 4.2E-3 (4166) 0 (1.0E-2) (1.5E-3 to 5.2E-3) (2.4 miles, NNE) (2.5E-3 to 5.2E-3) (3.2E-3 to 5.6E-3)

Air Radioiodine 1311 (290) 3.6E-2 All< LLD All< LLD 0 (pCilm 3) (1982) (7.0E-2)

Direct (TLD) 5 Gamma (1220) 0.5 9.9 (9151915) Site 13, North Dam, 13.1 (61161) 9. 7 (3051305) 0

(µR/hr) Monthly NIA (6.7 to 14.7) (2.9 miles, NNW) (12.2 to 14.2) (6.4 to 13.5)

(1978-1982)

Gamma (161) 0.5 10.2 (1541154) Site 55, St. Barnabas 14.0(7/7) 0 Quarterly NIA (6.8 to 14.7) Church, (2.8 miles, E) (13.1 to 14.7)

Surface Water 0 3

(pCi/1) H (43) 1.1E+3 1.4E+3 (18129) Site 17, Columbia 1.6E+3 (217) 1.2E+3 (6114)

(1981-1982) (2.0E+3) (1.1 E+3 to 2.4E+3) Canal, (24. 7 mile SE) (1.4E+3 to1.8E+3) (6. 7E+2 to 1.6E+3)

Gamma Spec (140) 54Mn 2.7E-1 All< LLD All< LLD 0 (1.5E+1) ssco 2.9E-1 All< LLD All< LLD 0 (1.5E+1) ssFe 6.0E+0 All< LLD All< LLD 0 (3.0E+1) soco 2.4E-1 All< LLD All< LLD 0 (1.5E+1) sszn 7.9E-1 All< LLD All< LLD 0 (3.0E+1) sszr 5.2E-1 All< LLD All< LLD 0 (1.5E+1) ssNb 3.3E-1 All< LLD All< LLD 0 (1.5E+1) 134Cs 3.0E-1 All< LLD All< LLD 0 (1.5E+1) 28

Location with Hiahest Annual Mean Medium or Pathway Type and Total Number of Lower Limit of All Indicator Control Locations Sampled (Unit of Number of Name Mean 2 (#/total #) Nonroutine Detection1 Actual Locations Mean 2 Mean 2 (#/total #)

Measurement and Analyses (Distance & Direction) (Range) Reported 3 (Max.) (#/total #) (Range) (Range)

Reoortina Period) Performed Measurements 137Cs 2.2E-1 All< LLD All< LLD 0 (1.8E+1) 14oBa 2.2E+O All< LLD All< LLD 0 (6.OE+1) 140La 5.5E-1 All< LLD All< LLD 0 (1982 only) (1.5E+1)

Ground Water Site 26, Onsite Well 3H (29) 9.OE+2 1.5E+3 (16/16) 1.6E+3 (8/8) 1.3E+3 (13/13)

{pCi/1) P4, 0 (2.OE+3) (9.5E+2 to 2.3E+3) (9.5E+2 to 2.3E+3) (1.OE+3 to 1.9E+3)

(1981-1982) (265 ft, W)

Gamma Spec (32) 54Mn 3.7E+O All< LLD All< LLD 0 (1.5E+1) ssco 3.8E+O All< LLD All< LLD 0 (1.5E+1) seFe 7.8E+O All< LLD All< LLD 0 (3.OE+1)

Boco 3.8E+O All< LLD All< LLD 0 (1.5E+1) 65Zn 8.1E+O All< LLD All< LLD 0 (3.OE+1) 95zr 6.8E+O All< LLD All< LLD 0 (1.5E+1) esNb 4.6E+O All< LLD All< LLD 0 (1.5E+1) 134Cs 3.7E+O All< LLD All< LLD 0 (1.5E + 1) 137Cs 3.8E+O All< LLD All< LLD 0 (1.8E + 1) 1408a 1.9E+1 All< LLD All< LLD 0 (6.OE+1) 140La 5.OEO All< LLD All< LLD 0 (1982 only) (1.5E+1)

Drinking Water6 Gross Beta 7 (2.0E+O)

(pCi/1) (1981-1982) 3H (14) 6.3E+2 7.8E+2 (6/14) Site 28, Jenkinsville, 8.4E+2 (3/7) 0 (1.OE+3) (6.8E+2 to 9.8E+2) (2.0 miles, SE)7 (7.OE+2 to 9.8E+2)

Gamma Spec (44) 54Mn 3.OE-1 All< LLD 0 (1.5E+1) ssco 2.7E-1 All< LLD 0 (1.5E+1) 29

Location with Hii;ihest Annual Mean Medium or Pathway Type and Total Number of Lower Limit of All Indicator Control Locations Sampled (Unit of Number of Name Mean 2 (#/total #) Non routine Detection1 Actual Locations Mean 2 Mean 2 (#/total #)

Measurement and Analyses (Distance & Direction) (Range) Reported 3 (Max.) (#/total#) (Range) (Range)

Reoortina Period) Performed Measurements ssFe 9.6EO All< LLD 0 (3.OE+1) soco 2.6E-1 All< LLD 0 (1.5E+1) 65Zn 3.4E-1 All< LLD 0 (3.OE+1) sszr 4.8E-1 All< LLD 0 (1.5E+1) 1311 3.4E-1 All< LLD 0 (1.5E+1) ssNb 7.4E-1 All< LLD 0 (1.OE+O) 134Cs 2.2E-1 All< LLD 0 (1.OE+1) 137Cs 2.4E-1 All< LLD 0 (1.8E+1) 1408a 2.5EO All< LLD 0 (6.OE+1) 140La 4.4E-1 All< LLD 0 (1982 onlv) (1.5E+1)

Milk Gamma Spec (pCi/I) (94)

(1981-1982) 1311 6.3E-1 All< LLD All< LLD 0 (1.OE+O) 134Cs 3.3E+O All< LLD All< LLD 0 (1.5E+1) 137Cs 4.6EO 4.1 E+O (8/47) Site 14, Dairy, 4.1 E+O (8/47) 5.7E+O (37/47) 0 (1.5E+1) (2.8E+O to 6.1 E+O) (5.1 miles, W) (2.8E+O to 6.1 E+O) (3. 7E+O to 9.2E+O) 1408a 1.1E+1 All< LLD All< LLD 0 (1.5E + 1) 140La 4.4E+O All< LLD All< LLD 0 (1.5E+1)

Grass (pCi/kg wet) Gamma Spec (1981-1982) (82) 1311 6.7E+1 All< LLD All< LLD 0 (6.OE+1) 134Cs 2.7E+1 All< LLD All< LLD 0 (8.OE+1) 137Cs 3.3E+1 5.OE+1 (13/51) Site 14, Dairy, 5.9E+1 (5/29) 1.3E+2 (6/31) 0 (8.OE+1) (1.6E+1 to 1.6E+2) (5.1 miles, W) (1.6E+1 to 1.6E+2) (1.3E+1 to 3.4E+2) 30

Location with Hiahest Annual Mean Medium or Pathway Type and Total Number of Lower Limit of All Indicator Control Locations Sampled (Unit of Number of Name Mean 2 (#/total #) Nonroutine Detection1 Actual Locations Mean2 Mean 2 (#/total #)

Measurement and Analyses (Distance & Direction) (Range) Reported 3 (Max.) (#/total #) (Range) (Range)

Reoortina Period) Performed Measurements Broadleaf Gamma Spec (10)

Vegetation (pCi/kg wet)

( 1980-1982) 1311 3.7E+1 All< LLD 0 (6.0E+1) 134Cs 1.9E+1 All< LLD 0 (8.0E+1) 131cs 2.1 E+1 3.1 E+1 (2/7) Site 2, Trans. Line, 3.6E+1 (1/1) All< LLD 0 (8.0E+1) (1.8E+1 to 3.6E+1) (1.2 miles, SW) (Sinale Value)

Other Vegetation Gamma Spec (pCi/kg wet) (32)

(1980-1982) 134Cs 8.4E+0 All< LLD All< LLD 0 (8.0E+1) 137Cs 1.0E+1 All< LLD All< LLD 0 (8.0E+1)

Fish (pCi/kg wet) Gamma Spec (1980 - 1982) (92) 134Cs 1.4E+1 All< LLD All< LLD 0 (1.3E+2) 137Cs 1.8E+1 2.8E+1 (50/71) Site 24, Recreation 3.4E+1 (17/23) 3.1E+1 (19/21) 0 (1.3E+2) (1.1 E+1 to 1.0E+2) Lake, (5.5 miles, N) 1.2E+1 to 1.0E+2) (1.0E+1 to 7.9E+1) ssco 2.6E+1 All< LLD All< LLD 0 (1.3E+2) 54Mn 1.8E+1 All< LLD All< LLD 0 (1.3E+2) ssFe 9.0E+1 All< LLD All< LLD 0 (2.6E+2) sszn 4.1 E+1 All< LLD All< LLD 0 (2.6E+2) soco 1.8E+1 All< LLD All< LLD 0 (1.3E+2)

Sediment (pCi/kg) Gamma Spec (24)

( 1980-1982) 134Cs 2.3E+1 All< LLD All< LLD 0 (1.5E+2) 137Cs 2.4E+1 1.7E+2 (12/18) Site 21, Parr 2.6E+2 (6/6) 4.2E+2 (6/6) 0 (1.5E+2) (2.6E+1 to 4.5E+2) Reservoir, (2.6E+1 to 4.5E+2) (1.8E+1 to 1.0E+3)

(2.7 miles, SSW) 31

V.C. Summer Nuclear Station

~ Dominion Bradham Blvd & Hwy 215, Jenkinsville, SC 29065 Mail ing Add ress:

P.O . Box 88, Jenki nsvill e, SC 29065

iiiiiiil" Energy Domin ionEnergy.com April 27, 2022 ATTN: Document Control Desk Serial No.22-135 U. S. Nuclear Regulatory Commission LIC/TS/R0 Washington, D. C. 20555-001 Docket No. 50-395 License No. NPF-12 DOMINION ENERGY SOUTH CAROLINA, INC. (DESC)

VIRGIL C. SUMMER NUCLEAR STATION UNIT 1 DOCKET NO. 50-395 OPERATING LICENSE NO. NPF-12 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT Enclosed is the DESC Annual Radiological Environmental Operating Report as required by Section 6.9.1.6 of the Virgil C. Summer Nuclear Station Technical Specifications.

lfthere are any questions, please call Ms. Tracey Stewart at (803) 931-5663.

Sincerely, Robin R. Haselden Director, Nuclear Station Safety and Licensing V. C. Summer Nuclear Station Commitments contained in this letter: None Enclosure cc: w/o Enclosure unless noted G. J. Lindamood - Santee Cooper L. Dudes - NRG Region II (w/Enclosure)

G. Miller - NRC Project Manager NRG Resident Inspector (w/Enclosure)

ANI (w/Enclosure)

Anu Nair- SCDHEC- Bureau of Environmental Health Services (w/Enclosure)

Serial No.22-135 Annual Radiological Environmental Operating Report be Page 1 of 1 be: w/o Enclosure unless noted J. H. Hamilton-VCS R. R. Haselden - VCS K. T. Ellison -VCS T. Riley-VCS (w/Enclosure)

C. D. Sly - IN2NW P. Bradley- INNS M. S. Moore - VCS D. E. Rowe - MPS M. Hofmann - NAPS A. LaFrance - SPS James Roth - IN2NW Kathryn Barrett- IN2NW W. S. Blair - RS RTS: RR 8300 File: 818.02-2 PRSF: SN-22-135 (w/Enclosure)

Concurrences:

See Correspondence Review and Approval Form Action Plan: None Changes to the UFSAR, USAR, QA Topical Report, or ISFSI FSAR: None

i1=, Dominion p, Energy ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT VIRGIL C. SUMMER NUCLEAR STATION FOR THE OPERA TING PERIOD JANUARY 1, 2021 - DECEMBER 31, 2021 L3J7L Brett Williams, Specialist Health Physics Timothy Riley, Superintendent

~ Todd Ellison, Manager Health Physics Technical Services Radiological Protection and Chemistry