Text

Independent Spent Fuel Storage Installation - Annual Radiological Environmental Operating Report
	ML23131A267
Person / Time
Site:	Calvert Cliffs
Issue date:	05/11/2023
From:	Barnett A, Grimmig D; Constellation Energy Generation
To:	; Office of Nuclear Material Safety and Safeguards, Office of Nuclear Reactor Regulation
Shared Package
ML23131A265	List: ML23131A266; ML23131A267;
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ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT FOR THE CALVERT CLIFFS NUCLEAR POWER PLANT UNITS 1 AND 2 AND THE INDEPENDENT SPENT FUEL STORAGE INSTALLATION Calvert Cliffs Nuclear Power Plant May 11, 2023

ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT FOR THE CALVERT CLIFFS NUCLEAR POWER PLANT UNITS 1 AND 2 AND THE INDEPENDENT SPENT FUEL STORAGE INSTALLATION January 1 - December 31, 2022 A. M. Barnett D. A. Grimmig CONSTELLATION NUCLEAR, LLC MAY 2023

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 i

TABLE OF CONTENTS LIST OF FIGURES...................................................................................................................... ii LIST OF TABLES....................................................................................................................... iii I.

SUMMARY

.................................................................................................................................5 II. CALVERT CLIFFS NUCLEAR POWER PLANT RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM......................................................7 II.A. INTRODUCTION.........................................................................................................................................7 II.B. PROGRAM....................................................................................................................................................7 II.B.1 Objectives...............................................................................................................................................7 II.B.2 Sample Collection...................................................................................................................................8 II.B.3 Data Interpretation................................................................................................................................8 II.B.4 Program Exceptions...............................................................................................................................8 II.C. RESULTS AND DISCUSSIONS...................................................................................................................8 II.C.1 Aquatic Environment.............................................................................................................................8 II.C.1.a Bay Water.............................................................................................................................................8 II.C.1.b Aquatic Organisms..............................................................................................................................9 II.C.1.c Shoreline Sediment..............................................................................................................................9 II.C.2 Atmospheric Environment..................................................................................................................12 II.C.2.a Air Particulate Filters.......................................................................................................................12 II.C.2.b Air Iodine..........................................................................................................................................12 II.C.3 Terrestrial Environment....................................................................................................................14 II.C.3.a Vegetation..........................................................................................................................................14 II.C.4 Direct Radiation...................................................................................................................................14 II.D. CONCLUSION.............................................................................................................................................18 III. INDEPENDENT SPENT FUEL STORAGE INSTALLATION RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM....................................................24 III.A. INTRODUCTION.......................................................................................................................................24 III.B. PROGRAM..................................................................................................................................................24 III.B.1 Objectives............................................................................................................................................24 III.B.2 Sample Collection...............................................................................................................................25 III.B.3 Data Interpretation............................................................................................................................25 III.C. RESULTS AND DISCUSSIONS...............................................................................................................25 III.C.1 Atmospheric Environment................................................................................................................25 III.C.1.a Air Particulate Filters.....................................................................................................................25 III.C.2 Terrestrial Environment...................................................................................................................26 III.C.2.a Vegetation........................................................................................................................................26 III.C.2.b Soils..................................................................................................................................................26 III.D. CONCLUSION............................................................................................................................................28 IV. REFERENCES......................................................................................................................32 APPENDIX A Sample Locations for the REMP and the ISFSI.............................................34 APPENDIX B Analysis Results for the REMP and the ISFSI...............................................43 APPENDIX C Quality Assurance Program.............................................................................65 APPENDIX D Land Use Survey................................................................................................90 APPENDIX E Additional Samples and Analysis Results.......................................................91

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 ii LIST OF FIGURES Figure Title Page 1

Tritium in Chesapeake Bay Water.....................................................................................10 2

Silver-110m and Potassium-40 in Chesapeake Bay Oysters............................................11 3

Nuclear Fallout in the Calvert Cliffs Area.........................................................................13 4a Mean Dosimeter Gamma Dose, Calvert Cliffs Nuclear Power Plant................................16 4b 2022 Quarterly Dosimeter Gamma Dose, per Location, Calvert Cliffs Nuclear Power Plant...................................................................................................................................17 5

Atmospheric Dispersion Around CCNPP Average Relative Air Concentrations (X/Q)...20 6

Atmospheric Dispersion Around CCNPP Average Relative Ground Deposition (D/Q)..21 7

Mean Dosimeter Gamma Dose, ISFSI...............................................................................29 A-1 Map of Southern Maryland and Chesapeake Bay Showing Location of Calvert Cliffs Nuclear Power Plant..........................................................................................................37 A-2 Calvert Cliffs Nuclear Power Plant Sampling Locations, 0-2 Miles.................................38 A-3 Calvert Cliffs Nuclear Power Plant Sampling Locations, 0-10 Miles...............................39 A-4 Independent Spent Fuel Storage Installation Sampling Locations....................................41 A-5 Enlarged Map of the Independent Spent Fuel Storage Installation Sampling Locations..42 E-1 Site Map Groundwater Monitoring Wells.......................................................................106 E-2 Site Map Rainwater Loctaions.........................................................................................107

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 iii LIST OF TABLES Table Title Page 1

Synopsis of 2022 Calvert Cliffs Nuclear Power Plant Radiological Environmental Monitoring Program...........................................................................................................22 2

Annual Summary of Radioactivity in the Environs of the Calvert Cliffs Nuclear Power Plant Units 1 and 2.............................................................................................................23 3

Synopsis of 2022 Calvert Cliffs Nuclear Power Plant Independent Spent Fuel Storage Installation Radiological Environmental Monitoring Program.........................................30 4

Annual Summary of Radioactivity in the Environs of the Calvert Cliffs Nuclear Power Plant Independent Spent Fuel Storage Installation............................................................31 A-1 Locations of Environmental Sampling Stations for the Calvert Cliffs Nuclear Power Plant

............................................................................................................................................36 A-2 Locations of Environmental Sampling Stations for the Independent Spent Fuel Storage Installation at Calvert Cliffs..............................................................................................40 B-1 Concentration of Tritium and Gamma Emitters in Bay Water..........................................45 B-2 Concentration of Gamma Emitters in the Flesh of Edible Fish.........................................46 B-3 Concentration of Gamma Emitters in Oyster Samples......................................................47 B-4 Concentration of Gamma Emitters in Shoreline Sediment................................................48 B-5 Concentration of Iodine-131 in Filtered Air......................................................................49 B-6 Concentration of Beta Emitters in Air Particulates............................................................51 B-6 Concentration of Beta Emitters in Air Particulates............................................................53 B-7 Concentration of Gamma Emitters in Air Particulates......................................................55 B-8a Concentration of Gamma Emitters in Vegetation Samples...............................................56 B-8b Concentration of Gamma Emitters in Vegetation From Locations Around the ISFSI......58 B-9 Concentration of Gamma Emitters in Soil Samples From Locations Around the ISFSI..59 B-10 Typical MDA Ranges for Gamma Spectrometry..............................................................60 B-11 Typical LLDs for Gamma Spectrometry...........................................................................61 B-12 Direct Radiation.................................................................................................................62 C-1 Results of Participation in Cross Check Programs............................................................69 C-2 Results of Quality Assurance Program..............................................................................75 C-3 Calvert Cliffs Nuclear Power Plant ODCM Required LLDs.............................................89 D-1 Land Use Survey................................................................................................................90 E-1 Locations of Non-Tech Spec and Radiological Groundwater Environmental Sampling Stations for Calvert Cliffs Nuclear Power Plant................................................................93 E-2 Synopsis of 2022 Calvert Cliffs Nuclear Power Plant Non-Tech Spec Radiological Environmental Monitoring Program..................................................................................94 E-3 Annual Summary for Calvert Cliffs Nuclear Power Plant Units 1 & 2 Non-Tech Spec Radiological Environmental Monitoring Program............................................................95 E-4 Concentration of Gamma Emitters in Bottom Sediment...................................................96 E-5 Concentration of Iodine-131 in Filtered Air......................................................................97 E-6 Alpha Isotopic and Pu-241 in Groundwater......................................................................99

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 iv E-7 Gross Alpha Activity in Groundwater.............................................................................100 E-8 Concentration of Radiostrontium in Groundwater..........................................................101 E-9 Concentration of Tritium in Groundwater.......................................................................102 E-10 Concentration of Tritium in Surface Water, Precipitation, and Subsurface Drainage.....103 E-11 Gross Concentration of Gamma Emitters in Groundwater..............................................104 E-12 Gross Concentration of Gamma Emitters in Surface Water, Precipitation and MH.......105

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 5

I.

SUMMARY

During 2022, Calvert Cliffs Nuclear Power Plant (CCNPP) Units 1 and 2, a total of 2216 radiological analyses were performed, and the analytical results reviewed. Most of these analyses were performed to satisfy the requirements of the Offsite Dose Calculation Manual (ODCM)

(Ref. 6), the Environmental Technical Specifications (Ref. 5) and the Independent Spent Fuel Storage Installation (ISFSI) Technical Specifications (Ref. 10). Some of these samples, although not required by either the ODCM or the Technical Specifications, were collected to maintain our commitments to the surrounding community and to maintain historical continuity of the CCNPP Radiological Environmental Monitoring Program (REMP) that started in 1970. The entire monitoring program in place around CCNPP is divided into three parts: the original REMP, the ISFSI monitoring program, and the Non-ODCM Radiological Environmental Monitoring. The following paragraphs describe each of these parts in more detail.

A total of 946 radiochemical analyses were performed on 906 environmental samples; and 364 Optically Stimulated Luminescent Dosimeters (OSLDs) were analyzed for ambient radiation exposure rates as part of the original REMP. These analyses were performed to satisfy the requirements of the ODCM (Ref. 6) and the Environmental Technical Specifications (Ref. 5).

For the ISFSI monitoring program, 320 radiochemical analyses were performed on 300 environmental samples, 224 of which were in common with the original REMP. In addition, 320 OSLDs, 16 in common with the original REMP, were analyzed for ambient radiation exposure rates. These analyses were performed to satisfy the requirements of the ODCM (Ref. 6) and the ISFSI Technical Specifications (Ref. 10).

Lastly, 350 radiochemical analyses were performed on 274 quality assurance samples and 156 quality assurance OSLDs were analyzed as part of an internal and external quality assurance program associated with Teledyne Brown Engineering. Laboratory inter-comparison samples obtained from Environmental Resource Associates (ERA) and Analytics Inc. were also analyzed.

Samples collected from the aquatic environment included bay water, fish, oysters, and shoreline sediment. Bay water was analyzed for tritium and gamma emitters. Fish, oysters, and shoreline sediments were analyzed for gamma emitting radionuclides.

Monitoring the atmospheric environment involved sampling the air at various locations surrounding CCNPP and the ISFSI. Air particulates and gaseous iodine were collected on glass fiber filters and charcoal cartridges, respectively. The particulate filters were analyzed for beta activity and gamma emitting nuclides. The charcoal cartridges were analyzed for airborne gaseous radioiodine.

Samples from the terrestrial environment consisted of vegetation and soil samples collected and analyzed for gamma emitters. Vegetation samples for the original REMP were also analyzed for I-131.

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 6

Measurements of direct radiation, as required by the ODCM, were performed by analyzing OSLDs from forty-two locations surrounding CCNPP and the ISFSI.

Natural radioactivity was detected in essentially all 2216 radiological analyses performed. Low levels of man-made fission products were also observed in 6 of these analyses for the CCNPP REMP. Two of these observations were for low level Tritium and is attributed to normal plant operations. The other 4 observations were for Cs-137 and attributed to fallout from past atmospheric weapons testing. Detailed discussions about the results of these analyses are contained in the body of this report.

To assess the plant's contribution to the radiation levels of the ambient environment, dose calculations were performed by Murray and Trettel, Inc. using 2022 data from the plant's effluent releases, 2022 on-site meteorological data, and appropriate pathways. Details on these dose calculations and meteorological trends from 2022 are provided in the Annual Report on the Meteorological Monitoring Program at the Calvert Cliffs Nuclear Power Station 2022. The results of these dose calculations indicate:

a.

a maximum thyroid dose of 1.87 x 10-2 mrem via liquid and gaseous pathways, which is about 0.0249% of the acceptable limit of 75 mrem/yr as specified in 40CFR190 "Environmental Radiation Protection Standards for Nuclear Power Operations" and 10CFR72.104, Licensing Requirements for the Independent Storage of Spent Nuclear Fuel and High-Level Radioactive Waste;

b. a maximum whole-body dose of 2.52 x 10-2 mrem via liquid and gaseous pathways, which is about 0.101% of the acceptable limit of 25 mrem/yr as specified in both 40CFR190 and 10CFR72.104; and c.

a maximum calculated dose to all other organs via liquid and gaseous pathways was equal to 3.54 x 10-2 mrem. This dose is about 0.142% of the allowable limit of 25 mrem/yr as specified in both 40CFR190 and 10CFR72.104.

Thus, it is concluded based upon the levels of radioactivity observed and the various dose calculations performed, that CCNPP Units 1 and 2 and the ISFSI did not cause any significant radiological impact on the surrounding environment.

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 7

II. CALVERT CLIFFS NUCLEAR POWER PLANT RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM II.A. INTRODUCTION The REMP has been conducted in the vicinity of CCNPP since the summer of 1970. The Calvert Cliffs site is an operating nuclear generating station consisting of two pressurized water reactors.

Unit 1 achieved criticality on October 7, 1974 and commenced commercial operation in May 1975. Unit 2 achieved criticality on November 30, 1976 and went into commercial operation April 1, 1977. The location of the plant in relation to local metropolitan areas is shown on Figure A-1.

Results of the monitoring program for the pre-operational period have been reported in a series of documents (Ref. 1-4). The results from previous operational periods are contained in annual reports submitted to the Nuclear Regulatory Commission (NRC) as required.

Results of the monitoring program for the current operational period are included in this report.

The report presents the content of the REMP (Table 1), the sampling locations (Appendix A), the summary of the analytical results (Table 2), a compilation of the analytical data (Appendix B),

the results of the Interlaboratory Comparison Program and the Quality Assurance Program (Appendix C), the results of the Land Use Survey (Appendix D), and a compilation of the analytical data for extra samples collected (Appendix E). Interpretation of the data and conclusions are presented in the body of the report.

The environmental surveillance data collected during this reporting period were compared with that generated in previous periods whenever possible to evaluate the environmental radiological impact of CCNPP Units 1 and 2.

II.B. PROGRAM II.B.1 Objectives The objectives of the REMP for the Calvert Cliffs Nuclear Power Plant are:

a.

To verify that radioactivity and ambient radiation levels attributable to plant operation are within the limits specified in the ODCM (Ref. 6) and the Environmental Radiation Protection Standards as stated in 40CFR190,

b. To detect any measurable buildup of long-lived radionuclides in the environment, c.

To monitor and evaluate ambient radiation levels, and

d. To determine whether any statistically significant increase occurs in the concentration of radionuclides in important pathways.

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 8

II.B.2 Sample Collection The locations of the individual sampling stations are listed in Table A-1 and shown in Figures A-2 and A-3. All samples were collected by contractors to, or personnel of Constellation Generation Solutions (CGS) according to Procedures (Ref. 7, 12 and 15).

II.B.3 Data Interpretation Many results in environmental monitoring occur at or below the minimum detectable activity (MDA). In this report, all results at or below the relevant MDA are reported as being "less than" the MDA value which is the minimum detectable activity for each nuclide in that sample at the time of analysis.

II.B.4 Program Exceptions There was one dosimetry program exception during this operating period.

DR23 in Quarter 3 2022 dosimeters were lost. The two dosimeters and their housing were completely missing in the field. Two additional dosimeters were lost that had been collocated for Quality Assurance purposes. The collector searched the area and was unable to recover the equipment. A new housing and dosimeters were deployed for the next quarter. These losses were captured in the Nuclear Corrective Action Program to document the events and trend future events should they occur. (IR#04530384)

II.C. RESULTS AND DISCUSSIONS All the environmental samples collected during the year were analyzed using Constellation Generation Solutions (CGS) laboratory procedures (Ref. 8), except Tritium which was analyzed by Teledyne Brown Engineering (Ref. 14) and Dosimetry analysis provided by Landauer using OSLDs (Ref. 17). The analytical results for this reporting period are presented in Appendix B and are also summarized in Table 2. For discussion, the analytical results are divided into four categories. The categories are Aquatic Environment, Atmospheric Environment, Terrestrial Environment, and Direct Radiation. These categories are further divided into subcategories according to sample type (e.g. Bay Water and Aquatic Organisms for Aquatic Environment).

II.C.1 Aquatic Environment The aquatic environment surrounding the plant was monitored by analyzing samples of bay water, aquatic organisms, and shoreline sediment. The samples were obtained from various sampling locations on the Chesapeake Bay near the plant.

II.C.1.a Bay Water Monthly bay water samples were taken from two locations during the year. These locations are the Intake Area (sample code WA1) and the Discharge Area (sample code WA2). Composite

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 9

samples were obtained from each location for the entire sampling period. These samples were analyzed for tritium and gamma emitters.

The tritium analyses, performed on quarterly composites of the monthly bay water samples, revealed low level concentrations of Tritium in two samples at the Discharge Area (sample code WA2). Tritium was identified in the first quarterly sample collected from 12/30/2021 to 03/30/2022 at 187 +/- 117 pCi/L and the third quarterly sample collected from 07/01/2022 to 09/30/2022 at 599 +/- 138 pCi/L.

Figure 1 compares tritium observed in the plant discharge and intake with annual effluent releases as reported in the Radioactive Effluent Release Report.

Monthly analyses of bay water samples from both locations for gamma emitters exhibited no detectable concentrations of any plant-related radionuclides.

II.C.1.b Aquatic Organisms Twelve samples of aquatic organisms were obtained from four locations during the year.

Samples of fish, when in season, are normally collected from the Discharge Area (sample codes IA1 and IA2) and from the Patuxent River (sample codes IA4 and IA5). As shown in Table B-2, two species of fish were sampled at both the plant discharge and the control point in the Patuxent River. Oyster samples were obtained quarterly from Camp Conoy (sample code IA3) and Kenwood Beach (IA6).

Figure 2 compares K-40 and Ag-110m observed in oysters from Camp Conoy (IA3) with annual effluent releases of Ag-110m as reported in the Radioactive Effluent Release Report.

Edible portion of the fish and oyster samples were analyzed for gamma emitters.

Gamma spectrometric analyses of the fish exhibited naturally occurring K-40 but no detectable concentrations of any plant-related radionuclides. Oyster samples likewise exhibited naturally occurring K-40 but no detectable concentrations of any plant-related radionuclides.

II.C.1.c Shoreline Sediment Semiannual shoreline sediment samples are taken from one location during the year. This location is Shoreline at Barge Road (sample code WB1). The semiannual shoreline sediment samples obtained from this location were analyzed for gamma emitters.

Gamma spectrometric analyses of these samples exhibited naturally occurring radionuclides, but no detectable concentration of any plant-related radionuclides.

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 10 FIGURE 1 Tritium in Chesapeake Bay Water 0

200 400 600 800 1000 1200 75 77 79 81 83 85 87 89 91 93 95 97 99 01 03 05 07 09 11 13 15 17 19 21 23 Tritium in Liquid Effluents (Ci/qtr)

Calendar Year 0

500 1000 1500 2000 75 77 79 81 83 85 87 89 91 93 95 97 99 01 03 05 07 09 11 13 15 17 19 21 23 Concentration at Discharge (pCi/L)

Calendar Year 0

50 100 150 200 250 300 350 400 450 75 77 79 81 83 85 87 89 91 93 95 97 99 01 03 05 07 09 11 13 15 17 19 21 23 Concentration at Intake (pCi/L)

Calendar Year

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 11 FIGURE 2 Silver-110m and Potassium-40 in Chesapeake Bay Oysters 0

0.02 0.04 0.06 0.08 0.1 0.12 0.14 0.16 0.18 74 76 78 80 82 84 86 88 90 92 94 96 98 00 02 04 06 08 10 12 14 16 18 20 22 24 Ag-110m in Liquid Effluents (Ci/qtr)

Calendar Year 0

1000 2000 3000 4000 5000 6000 7000 74 76 78 80 82 84 86 88 90 92 94 96 98 00 02 04 06 08 10 12 14 16 18 20 22 24 Ag-110m in Oysters Camp Conoy (pCi/kg)

Calendar Year 0

1000 2000 3000 4000 5000 6000 7000 74 76 78 80 82 84 86 88 90 92 94 96 98 00 02 04 06 08 10 12 14 16 18 20 22 24 K-40 in Oysters Camp Conoy (pCi/kg)

Calendar Year

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 12 II.C.2 Atmospheric Environment The atmospheric environment was monitored by analyzing air particulate filters and charcoal cartridges (for trapping radioiodine species). Samples were collected from eight locations surrounding the plant. The locations are On Site Before Entrance to Camp Conoy (sample code A1), Camp Conoy Road at the Emergency Siren (sample code A2), Bay Breeze Road (sample code A3), Route 765 at Lusby (sample code A4), and at the Emergency Operations Facility (sample code A5), Meteorological Station (sample code SFA1), NNW of ISFSI (sample code SFA3), and SSE of ISFSI (sample code SFA4). Sample locations A1, SFA1, SFA3, and SFA4 are common to the REMP monitoring program and the ISFSI monitoring program.

II.C.2.a Air Particulate Filters Weekly composite air particulate filter samples were collected from the eight locations, referenced, above during the year. These samples were analyzed for beta activity and gamma emitters.

Weekly analyses for beta activity on air particulate filters collected from all eight locations showed values characteristic of background levels. The values ranged from 0.9 x 10-2 to 4.8 x 10-2 pCi/m3 for the indicator locations and 0.9 x 10-2 to 4.4 x 10-2 pCi/m3 at the control location. The location with the highest overall mean of 2.2 x10-2 pCi/m3 was A4, Route 765 at Lusby.

Gamma spectrometric analyses of Quarterly composited air particulate weekly samples exhibited no detectable concentrations of any plant-related radionuclides in any of these samples. Naturally occurring radionuclides, such as Be-7, were detected in nearly all samples.

Figure 3 depicts the historical trends of beta activity.

II.C.2.b Air Iodine Weekly composited charcoal cartridges (for trapping radioiodine species) were collected from the eight locations, referenced above, during the year. These samples were analyzed for radioiodine species and exhibited no detectable concentrations of I-131 during the year.

Figure 3 depicts the historical trends of manmade radioiodine activity for location A4, Route 765 at Lusby including the impact I-131 due to significant events such as the fallout resulting from the accident event at Chernobyl in 1986 and the accident event at Fukushima Daiichi in 2011.

These examples demonstrate the sensitivity of the CCNPP REMP. Since the REMP is able to detect fallout from nuclear accidents from across the world, it is clear that the REMP would be able to detect the environmental accumulation of radioactive material coming directly from CCNPP.

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 13 FIGURE 3 Nuclear Fallout in the Calvert Cliffs Area SURFACE AIR VAPORS, LUSBY, MD (A4) 0 50 100 150 200 250 74 76 78 80 82 84 86 88 90 92 94 96 98 00 02 04 06 08 10 12 14 16 18 20 22 24 I-131 Concentration (fCi/m3)

Calendar Year ATMOSPHERIC FALLOUT From Chernobyl ATMOSPHERIC FALLOUT From Fukushima Dai-Ichi 0

200 400 600 800 1000 1200 75 77 79 81 83 85 87 89 91 93 95 97 99 01 03 05 07 09 11 13 15 17 19 21 23 Gross Beta Concentration (fCi/m3)

Calendar Year ATMOSPHERIC FALLOUT From Chernobyl ATMOSPHERIC FALLOUT From Weapons Testing ATMOSPHERIC FALLOUT From Weapons Testing

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 14 II.C.3 Terrestrial Environment The terrestrial environment was monitored by analyzing samples of vegetation collected monthly, when available, from various sampling locations near the plant during the normal growing season.

II.C.3.a Vegetation Vegetation samples were collected from three locations during the year. These locations are On Site Before Entrance to Camp Conoy (sample codes IB4, IB5, and IB6), the Emergency Operations Facility (sample codes IB7, IB8, and IB9), and the Garden Plot at Meteorological Station (sample codes IB10, IB11, and IB12). These samples were analyzed for gamma emitters, including analyses for I-131.

All samples showed detectable amounts of naturally occurring K-40 and Be-7. No plant related radionuclides were found in any of these samples.

II.C.4 Direct Radiation Direct radiation is measured by a network of environmental dosimeters in each overland sector surrounding the plant, both at the plant boundary and at 4 miles from the plant.

Environmental Dosimeters were collected quarterly from twenty-three locations surrounding the plant. The twenty indicator locations are On Site Along the Cliffs (sample code DR1), Route 765 Auto Dump (sample code DR2), Giovanni's Tavern (sample code DR3), Route 765 Across from White Sand Dr (sample code DR4), Route 765 at John's Creek (sample code DR5), Lusby (sample code DR6), On Site before the Entrance to Camp Conoy (sample code DR7), On Site at Emergency Siren (sample code DR8), Bay Breeze Road (sample code DR9), Calvert Beach Road & Decatur St (sample code DR10), Dirt Road off Mackall Rd & and Parran Rd (sample code DR11), Bowen Rd & Mackall Rd (sample code DR12), Mackall Rd near Wallville (sample code DR13), Rodney Point (sample code DR14), Mill Bridge Rd & Turner Rd (sample code DR15), Across from Appeal School (sample code DR16), Cove Point Rd & Little Cove Point Rd (sample code DR17), Cove Point (sample code DR18), Long Beach (sample code DR19), and Onsite Near Shore (sample code DR20). The three control locations are the Emergency Operations Facility (sample code DR21), Solomons Island (sample code DR22), and Taylors Island, Andersons Property (sample code DR23).

In 2022 OSLDs were provided by and analyzed by Landauer, Inc. The 2022 mean 91-day ambient radiation measured at the indicator locations was 12.2 mrem and ranged from 8.7 to 32 mrem as reported in Table 2. The control locations showed a 91-day mean of 14.3 mrem with ranges from 12.1 to 17.0 mrem. The location with the highest overall mean of 17.0 was Taylors Island, Andersons Property (sample code DR23) which ranged from 16.4 to 17.4 Mrem for the first, second, and fourth quarters that data was available. Dosimeters were lost from the pole and could not be recovered for the third quarter. This is a program exception that was captured in the sites corrective action program for tracking and future trending and is also discussed in section II.B.4 Program Exceptions in this report.

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 15 Figure 4-a depicts the long-term trend of mean dosimeter exposure for the 4-mile, Control Location, and On-Site dosimeters. In June of 2018 the site adopted the requirements of the updated ANSI 13.37 standard which quantifies the dose due to the environment with enhanced accuracy and quality assurance by removing extraneous dose from the total measurement to give a true facility related dose result. Dosimeters accumulate dose continuously and extraneous dose represents the dose accumulated before and after the time spent at the sample location so the true dose accumulated at that location can be accurately determined.

Figure 4-b depicts quarterly exposure at each Dosimeter location in 2022, with the locations ranked by increasing exposure. From these graphs, it can be seen that there is a slight bias towards higher exposure at the control locations outlined in bold. This is due to higher natural background radiation at DR23 (Taylor's Island, 7.8 miles from CCNPP). This slight bias is due to normal variations in background radiation levels and is consistent with pre-operational data.

Note that in figure 4-b, the ranking of DR23 is diminished because Q3 data was not available for that dosimetry location. This has been identified in the program exceptions section of this report.

For example, in figure 4a this trend can be observed in the first calendar year of the graph, 1973, which was a year prior to the first criticality of Unit 1 (October 7, 1974). Facility-related dose was not detected at any of the monitoring locations in 2022.

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 16 FIGURE 4a Mean Dosimeter Gamma Dose, Calvert Cliffs Nuclear Power Plant 0

1 2

3 4

5 6

73 75 77 79 81 83 85 87 89 91 93 95 97 99 01 03 05 07 09 11 13 15 17 19 21 23 mR/30 Days Calendar Year 4 Miles (DR10-18)

Control Locations (DR21-23)

On-Site (DR1, 7, 8, 20 )

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 17 FIGURE 4b 2022 Quarterly Dosimeter Gamma Dose, per Location, Calvert Cliffs Nuclear Power Plant

No data available for DR23, dosimeters were lost from the pole in Qtr. 3 2022 0

10 20 30 40 50 60 70 80 Exposure mrem Dosimeter Location 2022 Quarterly (91 day) Exposure of Environmental Dosimeters Ranged by Summed Annual Exposure Q1 Q2 Q3 Q4

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 18 II.D. CONCLUSION Two occasions of low level Tritium in plant discharge were observed in 2022 and are attributable to normal plant operations. Results are described in section II.C.1.a of this report and are plotted in Figure 1 for which demonstrates consistency with historical trends at a low level of activity that is well below regulatory limits established in 40CFR190 and 10CFR72.104. No other man-made fission or activation by-products attributable to plant operations were observed in the environment surrounding the plant during the year.

Historical trends for tritium in bay water, Ag-110m and K-40 in oyster samples, nuclear fallout in the Calvert Cliffs area, and OSLD data are depicted in Figures 1 through 4. As can be seen from these figures, the plant made no adverse radiological contributions to the surrounding environment.

To assess the plant's contribution to the ambient radiation levels of the surrounding environment, dose calculations were performed by Murray and Trettel, Inc. using the plant's 2022 effluent release data, on site meteorological data (see X/Q and D/Q values presented in Figures 5 and 6),

and appropriate pathways. Details on these dose calculations and meteorological trends from 2022 are provided in the Annual Report on the Meteorological Monitoring Program at the Calvert Cliffs Nuclear Power Station 2022. The results of these dose calculations indicate:

Gaseous Pathways A maximum thyroid dose of 1.20 x 10-5 mrem to a child via the plume, ground, vegetable, and inhalation pathways at 2.7 miles WNW of the containments at Calvert Cliffs.

This is about 0.000016% of the acceptable limit of 75 mrem/yr as specified in 40CFR190 and 10CFR72.104.

A maximum whole-body gamma dose of 1.20 x 10-5 mrem to a teenager at 2.2 miles WNW of the containments at Calvert Cliffs. This is about 0.0000480% of the acceptable dose limit of 25 mrem/yr as specified in 40CFR190 and 10CFR72.104.

A maximum dose to any other organ, in this case GI Tract, of 1.22 x 10-5 mrem to a teenager at 2.7 miles WNW of the containments at Calvert Cliffs. This is about 0.0000488% of the acceptable dose limit of 25 mrem/yr as specified in 40CFR190 and 10CFR72.104.

Liquid Pathways A maximum thyroid dose of 1.87 x 10-2 mrem to a teenager for all liquid pathways, which is about 0.0249% of the acceptable dose limit of 75 mrem/yr as specified in 40CFR190 and 10CFR72.104.

A maximum whole-body dose of 2.52 x 10-2 mrem to a teenager via all liquid pathways, which is about 0.101% of the acceptable dose limit of 25 mrem/yr as stated in 40CFR190 and 10CFR72.104.

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 19 A maximum dose to any other organ, in this case Bone, of 3.54 x 10-2 mrem to a teenager for all pathways, which is 0.142% of the acceptable dose limit of 25 mrem/yr specified in 40CFR190 and 10CFR72.104.

Gaseous and Liquid Pathways Combined A maximum thyroid dose of 1.87 x 10-2 mrem via liquid and gaseous pathways, which is about 0.0249% of the acceptable limit of 75 mrem/yr as specified in 40CFR190 and 10CFR72.104.

A maximum whole-body dose of 2.52 x 10-2 mrem via liquid and gaseous pathways, which is about 0.101% of the acceptable limit of 25 mrem/yr as specified in 40CFR190 and 10CFR72.104.

A maximum calculated dose to all other organs via liquid and gaseous pathways was equal to 3.54 x 10-2 mrem. This dose was about 0.142% of the allowable limit of 25 mrem/yr as specified in 40CFR190 and 10CFR72.104.

In all cases, the calculated doses are a small fraction of the applicable limits specified in 40CFR190 and 10CFR72.104.

Therefore, it is concluded that the operation of Calvert Cliffs Units 1 and 2 produced radioactivity and ambient radiation levels significantly below the limits of the ODCM, 40CFR190, and 10CFR72.104. There was no significant buildup of plant-related radionuclides in the environment due to the operation of the CCNPP in 2022

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 20 FIGURE 5 Atmospheric Dispersion Around CCNPP Average Relative Air Concentrations (X/Q)

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 21 FIGURE 6 Atmospheric Dispersion Around CCNPP Average Relative Ground Deposition (D/Q)

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 22 Table 1 Synopsis of 2022 Calvert Cliffs Nuclear Power Plant Radiological Environmental Monitoring Program Sample Type Sampling Frequency1 Number of Locations Number Collected Analysis Analysis Frequency1 Number Analyzed Aquatic Environment Bay Water MC 2

24 Gamma MC 24 H-3 QC 8

Fish2 A

4 4

Gamma A

4 Oysters Q

2 8

Gamma Q

8 Shoreline Sediment SA 1

2 Gamma SA 2

Atmospheric Environment Air Iodine3 W

8 416 I-131 W

416 Air Particulates4 W

8 416 Gross Beta W

416 Gamma QC 32 Direct Radiation Ambient Radiation Q

23 364 OSLD Q

364 Terrestrial Environment Vegetation5 M

3 36 Gamma M

36 1 W=weekly, M=monthly, Q=quarterly, SA=semiannual, A=annual, C=composite 2 Once in Season, July through September 3 The collection device contains charcoal 4 Beta counting is performed after >72-hour decay, Gamma spectroscopy performed on quarterly composites of weekly samples 5 Monthly during growing season when available

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 23 Table 2 Annual Summary of Radioactivity in the Environs of the Calvert Cliffs Nuclear Power Plant Units 1 and 2 Medium or Pathway Sampled (Unit of Measurement)

Type and Total Number of Analyses Performed Lower Limit of Detection (LLD)

Indicator Locations Mean (F)/Range1 Location with Highest Annual Mean Name/Distance &

Direction2 Highest Annual Mean (F) / Range1 Control Locations Mean (F)/Range Aquatic Environment Bay Water (pCi/L)

H-3 (8) 200 393 (2/4)

(187-599)

Discharge Vicinity WA2 0.3 km N 393 (2/4)

(187-599)

Atmospheric Environment Air Particulates (10-2 pCi/m3)

Gross Beta (421) 0.5 2.1 (364/364)

(0.9-4.8)

Route 765 at Lusby A4 2.2 (52/52)

(0.9-4.8) 2.1 (52/52)

(0.9-4.4) 2.9 km SSW Direct Radiation Ambient Radiation (mrem/91 days)

OSLD (364) 0.1 12.2 (320/320)

(8.7-32)

Taylors Island DR23 12.4 km ENE 17.0 (12/12)

(16.4-17.4) 14.3 (44/44)

(12.1-17.0) 1 Mean and range based upon detectable measurements only. Fraction (F) of detectable measurements at specified location is indicated in parentheses.

2 Distance and direction from the central point between the two containment buildings.

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 24 III. INDEPENDENT SPENT FUEL STORAGE INSTALLATION RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM III.A. INTRODUCTION In August 1990 BGE initiated a program of additional radiological environmental monitoring around the site for the Independent Spent Fuel Storage Installation (ISFSI). The first dry fuel storage canister was loaded into the ISFSI in November of 1993 with more canisters being loaded in subsequent years. In 2021, the site transitioned to Holtec Hi-storm (Holtec International Storage Module) vertically ventilated storage overpack system for Independent Spent Fuel Storage installation. In 2022 there were three such canisters of spent fuel transferred to the ISFSI.

Results of the monitoring program for the ISFSI for the current period are included in this report.

This report presents the content of the ISFSI REMP (Table 3), the ISFSI sampling locations (Appendix A), the summary of the analytical results of the period (Table 4), and a compilation of the analytical data for the period (Appendix B). Interpretation of the data and conclusions are presented in the body of the report.

The ISFSI monitoring program is as described in this section of the report.

The results were compared with that generated during the previous ISFSI pre-operational periods (Ref.11) and the current and previous CCNPP REMP periods. These results are discussed in more detail in Section III. C.

III.B. PROGRAM III.B.1 Objectives The objectives of the radiological environmental monitoring program for the ISFSI are:

a.

To satisfy the community concern regarding the impact of the ISFSI on the environment,

b. To verify that radioactivity and ambient radiation levels attributable to operation of the ISFSI are within the limits specified in the Environmental Radiation Protection Standards as stated in 40CFRPart190 and 10CFR72.104, c.

To detect any measurable buildup of long-lived radionuclides in the environment due to the ISFSI,

d. To monitor and evaluate ambient radiation levels around the ISFSI, and e.

To determine whether any statistically significant increase occurs in the concentration of radionuclides near the ISFSI.

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 25 III.B.2 Sample Collection The locations of the individual sampling sites are listed in Table A-2 and shown in Figures A-4 and A-5. All samples were collected by contractors to, or personnel of, Constellation Generation Solutions (CGS) personnel according to Constellation Generation Solutions Laboratory Procedures (Ref. 7).

III.B.3 Data Interpretation Many results in environmental monitoring occur at or below the minimum detectable activity (MDA). In this report, all results at or below the relevant MDA are reported as being "less than" the MDA value which is the minimum detectable activity for each nuclide in that sample at the time of analysis.

III.B.4 Program Exceptions There were no program exceptions for the ISFSI Monitoring Program in 2022.

III.C. RESULTS AND DISCUSSIONS All the environmental samples collected were analyzed using Constellation Generation Solutions (CGS) laboratory procedures (Ref. 8). The analytical results for this reporting period are presented in Appendix B and are also summarized for the period in Table 4. For discussion, the analytical results are divided into three categories. The categories are Atmospheric Environment, Terrestrial Environment, and Direct Radiation. These categories are further divided into subcategories according to sample type (e.g., Vegetation and Soil for Terrestrial Environment).

III.C.1 Atmospheric Environment The atmospheric environment was monitored by analyzing air particulate filters. These samples were collected from five locations surrounding the ISFSI.

No source of airborne radioiodine exists for the ISFSI. Airborne radioiodine is, therefore, not considered in assessing the radiological impact of the ISFSI.

III.C.1.a Air Particulate Filters Weekly composite air particulate filter samples were collected from five locations during the period. These locations are On Site Before the Entrance to Camp Conoy (sample code A1),

Meteorological Station (sample code SFA1), CCNPP Visitors Center (sample code SFA2),

NNW of the ISFSI (sample code SFA3), and SSE of the ISFSI (sample code SFA4). Sample locations A1, SFA1, SFA3, and SFA4 are in common with CCNPP REMP Program. All samples were analyzed for beta radioactivity and gamma emitting radionuclides.

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 26 Weekly analyses for beta activity on air particulate filters collected from all five locations showed values characteristic of levels routinely observed in the REMP. These values ranged from 0.9 x 10-2 to 4.4 x 10-2 pCi/m3 for the indicator locations and 1.0 x 10-2 to 4.5 x 10-2 pCi/m3 for the control location. The location with the highest overall mean of 2.1 x 10-2 pCi/m3 was A1, On Site Before Entrance to Camp Conoy.

Gamma spectrometric analyses of quarterly composited air particulate samples exhibited no detectable concentrations of any plant-related radionuclides in any of these samples. Naturally occurring radionuclides, such as Be-7, were detected in nearly all samples.

III.C.2 Terrestrial Environment The terrestrial environment was monitored by analyzing samples of vegetation and soil collected quarterly from the vicinity of the air sampling locations for the ISFSI.

III.C.2.a Vegetation Vegetation samples were collected quarterly from five locations during the year. These locations are Meteorological Station (sample code SFB1), CCNPP Visitors Center (sample code SFB2),

NNW of the ISFSI (sample code SFB3), SSE of the ISFSI (sample code SFB4), and On Site Before the Entrance to Camp Conoy (sample code SFB5).

No detectable concentrations of plant-related radionuclides were found in any of these samples.

Naturally occurring radionuclides such as K-40 were detected in all samples.

III.C.2.b Soils Soil samples were collected quarterly from five locations surrounding the ISFSI in the vicinity of the air samplers. These locations are: Meteorological Station (sample code SFS1), CCNPP Visitors Center (sample code SFS2), NNW of the ISFSI (sample code SFS3), SSE of the ISFSI (sample code SFS4), and On Site before the Entrance to Camp Conoy (sample code SFS5).

Soil samples were analyzed for gamma emitting radionuclides. Cesium-137 was detected in four quarterly samples from indicator locations. The Cs-137 concentrations ranged from 70.6 +/- 46 to 146 +/- 62 pCi/kg. While the presence of Cs-137 in these samples may be plant-related, this range is consistent with that found to be due to the residual fallout from past atmospheric nuclear weapons testing. The activities of this radionuclide are well below the federal limits established in 40CFR190 and 10CFR72.104. These are comparable to those observed in previous annual reporting periods for the CCNPP REMP and in the earlier pre-operational data for the ISFSI. No detectable concentrations of plant-related radionuclides were found in any of these samples.

Naturally occurring radionuclides such as K-40 were also detected in all these samples.

III.C.3 Direct Radiation Direct radiation is measured by a network of Environmental Dosimeters (OSLDs) surrounding the ISFSI. These dosimeters are collected quarterly from nineteen locations surrounding the ISFSI, plus one control location at the Visitors Center (sample code SFDR7). The locations

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 27 include On Site Before the Entrance to Camp Conoy (sample code DR7, common to both the CCNPP Program and the ISFSI Program) and the Meteorological Station (sample code DR30, previously a location maintained for historical continuity.) The other sampling locations are SW of ISFSI, (sample code SFDR1); N of ISFSI (sample code SFDR2); North of ISFSI (sample code SFDR3); NE of ISFSI (sample code SFDR4); East of ISFSI (sample code SFDR5); ESE of ISFSI (sample code SFDR6); NNW of ISFSI (sample code SFDR8); SSE of ISFSI (sample code SFDR9); NW of ISFSI (sample code SFDR10); WNW of ISFSI (sample code SFDR11); WSW of ISFSI (sample code SFDR12); South of ISFSI (sample code SFDR13); SE of ISFSI (sample code SFDR14); ENE of ISFSI (sample code SFDR15); SW of ISFSI (sample code SFDR16);

NNE of ISFSI (sample code SFDR17) and West of ISFSI (sample code SFDR18). Sampling locations are shown on Figures A-4 and A-5.

The 2022 mean 91-day ambient radiation measured at the ISFSI indicator locations was 37.7 mrem and ranged from 9.8 to 127 mrem as reported in Table 4. The control location showed a 91-day mean of 14.8 mrem and ranged from 14.4 to 15.1 mrem. The location with the highest overall mean of 82.2 mrem with a range of 78.2 to 89.2 mrem was SFDR14, SE of ISFSI. These readings are consistent with those expected from the storage of spent fuel in the ISFSI. A comparison of the average monthly radiation levels per calendar year of the ISFSI dosimeter data from the indicator locations with the ISFSI control location at the Visitors Center, SFDR7, can be seen in Figure 7.

Facility-related dose was detected NE of ISFSI (sample code SFDR4); East of ISFSI (sample code SFDR5); ESE of ISFSI (sample code SFDR6); SSE of ISFSI (sample code SFDR9); South of ISFSI (sample code SFDR13); SE of ISFSI (sample code SFDR14); ENE of ISFSI (sample code SFDR15); SW of ISFSI (sample code SFDR16). This is expected as additional spent fuel casks are generally installed at the ISFSI each year. The ISFSI OSLDs are located directly around the perimeter of the ISFSI. Due to the proximity of these OSLDs to the spent fuel storage structures, they detect the small increase in radiation exposure each year. However, it is clear from Figure 4a that there is no observable direct radiation exposure of the public from the ISFSI, as the other REMP dosimeters (on-site, 4 miles, and beyond) show no observable increase in exposure when compared to control Dosimeters.

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 28 The 2022 mean 91-day Facility-related dose measured at the indicator locations was 43.0 mrem and ranged from 5.22 to 103 mrem. Facility-related dose was not detected at the control location.

The location with the highest overall mean of 64.2 mrem was Southeast of ISFSI (sample code SFDR14 which ranged from 60.2 to 71.2 mrem. A summary of the 2022 results is shown in the table below.

2022 ISFSI Facility-related Dose Quarterly (91-Day) Summary Mean Exposure (mrem)

Range (mrem)

Indicator Locations 43.0 5.22-103 Control Location Not Detected N/A Highest Overall Location (SFDR14) 64.2 60.2-71.2 III.D. CONCLUSION Low levels of Cs-137 were observed in the environment surrounding the ISFSI during the period. The Cs-137 observations were attributed to fallout from past atmospheric weapons testing. No plant-related radionuclides were observed in the environs of the ISFSI.

In general, the results in the following tables continue the historical trends previously observed at the official sites of the CCNPP REMP.

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 29 FIGURE 7 Mean Dosimeter Gamma Dose, ISFSI 0

2 4

6 8

10 12 14 90 92 94 96 98 00 02 04 06 08 10 12 14 16 18 20 22 mrem/30 days Calendar Year Control Location (SFDR7)

ISFSI Mean (DR7, DR30, SFDR1-6, 8-18)

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 30 Table 3 Synopsis of 2022 Calvert Cliffs Nuclear Power Plant Independent Spent Fuel Storage Installation Radiological Environmental Monitoring Program Sample Type Sampling Frequency1 Number of Locations Number Collected Analysis Analysis Frequency1 Number Analyzed Atmospheric Environment Air Particulates2 W

5 260 Gross Beta W

260 Gamma QC 20 Direct Radiation Ambient Radiation Q

20 320 OSLD Q

320 Terrestrial Environment Vegetation Q

5 20 Gamma Q

20 Soil Q

5 20 Gamma Q

20 1 W=weekly, M=monthly, Q=quarterly, SA=semiannual, A=annual, C=composite 2 Beta counting is performed after >72-hour decay, Gamma spectroscopy performed on monthly composites of weekly samples

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 31 Table 4 Annual Summary of Radioactivity in the Environs of the Calvert Cliffs Nuclear Power Plant Independent Spent Fuel Storage Installation Medium or Pathway Sampled (Unit of Measurement)

Type and Total Number of Analyses Performed Lower Limit of Detection (LLD)

Indicator Locations Mean (F)/Range1 Location with Highest Annual Mean Name/Distance &

Direction2 Highest Annual Mean (F) / Range1 Control Locations Mean (F)/Range Atmospheric Environment Air Particulates (10-2 pCi/m3)

Gross Beta (260) 0.5 2.0 (208/208)

(0.9-4.4)

NNW of ISFSI SFA3 0.1 km NNW 2.1 (52/52)

(1.0-4.1) 2.1 (52/52)

(1.0-4.5)

Direct Radiation Ambient Radiation (mrem/91 days)

OSLDs (320) 0.1 37.7 (304/304)

(9.8 - 127)

SE of ISFSI SFDR14 0.1 km SE 82.2 (16/16)

(78.2 - 89.2) 14.8 (16/16)

(14.4-15.1)

Terrestrial Environment Soil (pCi/kg)

Gamma (20)

Cs-137 180 122 (4/16)

(70.6-146)

NNW of ISFSI SFS3 0.1 km NNW 140 (3/4)

(133-146) 1 Mean and range based upon detectable measurements only. Fraction (F) of detectable measurements at specified location is indicated in parentheses.

2 Distance and direction from the central point between the two containment buildings.

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 32 IV. REFERENCES (1)

Cohen, L. K., Preoperational Environmental Radioactivity Monitoring Program at Calvert Cliffs Units 1 and 2, NUS No. 882 Semiannual Report January-June 1971, December 1971; NUS No. 1025 Annual Report 1971, March 1973.

(2)

Cohen, L. K., Preoperational Environmental Radioactivity Monitoring Program at Calvert Cliffs Units 1 and 2, NUS No. 1137 Annual Report 1972, December 1973.

(3)

Cohen, L. K. and Malmberg, M.S., Preoperational Environmental Radioactivity Monitoring Program at Calvert Cliffs Units 1 and 2, NUS No. 1188, Annual Report 1973, October 1974.

(4)

Malmberg, M. S., Preoperational Environmental Radioactivity Monitoring Program at Calvert Cliffs Units 1 and 2, NUS No. 1333, Data Summary Report, September 1970 to September 1974, July 1975 (5)

Calvert Cliffs Nuclear Power Plant, Units 1 and 2, License Nos. DPR-53 and DPR-69, Technical Specification 5.6.2; Annual Radiological Environmental Operating Report.

(6)

CY-CA-170-301 Current Revision, Offsite Dose Calculation Manual for the Calvert Cliffs Nuclear Power Plant.

(7)

Constellation Generation Solutions Sampling Procedures

a. CY-ES-214, Collection of RGPP Water Samples for Radiological Analysis

b. CY-ES-237, Air Iodine and Air Particulate Sample Collection for Radiological

c. CY-ES-239, EIS Collection Exchange of Field Dosimeters for Radiological Analysis

d. CY-ES-241, Vegetation Sample Collection for Radiological Analysis

e. CY-ES-242, Soil and Sediment Sample Collection for Radiological Analysis

f. CY-ES-247, Precipitation Sampling and Collection for Radiological Analysis (8)

Constellation Generation Solutions Analytical Procedures

a. CY-ES-204, Sample Preparation for Gamma Analysis

b. CY-ES-205, Operation of HPGe Detectors with the Genie PC Counting System

c. CY-ES-206, Operation of the Tennelec S5E Proportional Counter

d. CY-ES-246, Sample Preparation for Gross Beta Analysis (9)

Land Use Census Around Calvert Cliffs Nuclear Power Plant, August 2022 (10)

Calvert Cliffs Independent Spent Fuel Storage Installation Technical Specifications, Appendix A to Materials License SNM-2505 (11)

Baltimore Gas and Electric Company, Radiological Environmental Monitoring Program Pre-Operational Report for the Calvert Cliffs Independent Spent Fuel Storage Installation, August 1990 - November 1993, February 1994.

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 33 (12)

CY-AA-110-200, Current Revision, Sampling (13)

CY-AA-170-1000, Radiological Environmental Monitoring Program (REMP) and Meteorological Program Implementation.

(14) Teledyne Browne Engineering, (TBE) 2018 Analysis Procedures Current Revisions

a. TBE-2001 Alpha Isotopic and Pu-241

b. TBE-2006 Iron-55 Activity in Various Matrices

c. TBE-2007 Gamma Emitting Radioisotope Analysis

d. TBE-2008 Gross Alpha and/or Gross Beta Activity in Various Matrices

d. TBE-2011 Tritium Analysis in Drinking Water by Liquid Scintillation

e. TBE-2013 Radionickel Activity in Various Matrices

f. TBE-2019 Radiostrontium Analysis by Ion Exchange (15) Normandeau Associates, Inc. (NAI) Sampling Procedures Current Revisions

a. Procedure No. ER20 Collection of Bottom Sediment for Radiological Analysis (Calvert Cliffs Nuclear Power Plant)

b. Procedure No. ER21 Collection of Fish Samples for Radiological Analysis (Calvert Cliffs Nuclear Power Plant)

c. Procedure No. ER22 Collection of Oyster Samples for Radiological Analysis (Calvert Cliffs Nuclear Power Plant (16) EN-CA-408-4160 Current Revision, RGPP Reference Material for Calvert Cliffs (17) Landauer Incorporated, Analysis procedure proprietary, Current Revision

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 34 APPENDIX A Sample Locations for the REMP and the ISFSI Appendix A contains information concerning the environmental samples which were collected during this operating period.

Sample locations and specific information about individual locations for the CCNPP REMP are given in Table A-1. Figure A-1 shows the location of the CCNPP in relation to Southern Maryland and the Chesapeake Bay. Figures A-2 and A-3 show the locations of the power plant sampling sites in relation to the plant site at different degrees of detail.

Sample locations and specific information about individual locations for the ISFSI radiological environmental monitoring program are given in Table A-2. Figures A-4 and A-5 show the locations of the ISFSI sampling sites in relation to the plant site at different degrees of detail.

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 35 TABLE OF CONTENTS - SAMPLING LOCATIONS Table Title Page A-1 Locations of Environmental Sampling Stations for the Calvert Cliffs Nuclear Power Plant

............................................................................................................................................36 A-2 Locations of Environmental Sampling Stations for the Independent Spent Fuel Storage Installation at Calvert Cliffs...............................................................................................40 Figure Title Page A-1 Map of Southern Maryland and Chesapeake Bay Showing Location of Calvert Cliffs Nuclear Power Plant..........................................................................................................37 A-2 Calvert Cliffs Nuclear Power Plant Sampling Locations, 0-2 Miles.................................38 A-3 Calvert Cliffs Nuclear Power Plant Sampling Locations, 0-10 Miles...............................39 A-4 Independent Spent Fuel Storage Installation Sampling Locations....................................41 A-5 Enlarged Map of the Independent Spent Fuel Storage Installation Sampling Locations..42

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 36 TABLE A-1 Locations of Environmental Sampling Stations for the Calvert Cliffs Nuclear Power Plant Distance1 Direction1 Station Description (KM)

(Miles)

(Sector)

A12 On Site Before Entrance to Camp Conoy 0.7 0.5 S

A2 Camp Conoy Rd, at emergency siren 2.5 1.5 SSE A3 Bay Breeze Rd 2.6 1.6 SE A4 Route 765, Lusby 2.9 1.8 SSW A5 Emergency Operations Facility 19.3 12.1 WNW DR01 On Site, along Cliffs 0.6 0.4 NW DR02 Route 765, Auto Dump 2.7 1.7 WNW DR03 Route 765, Giovanni's Tavern (Knotty Pine) 2.3 1.4 W

DR04 Route 765, across from Vera's Beach Club 2.0 1.2 WSW DR05 Route 765, John's Creek 2.4 1.5 SW DR06 Route 765, Lusby 2.9 1.8 SSW DR072 On Site Before Entrance to Camp Conoy 0.7 0.5 S

DR08 Camp Conoy Rd at Emergency Siren 2.5 1.5 SSE DR09 Bay Breeze Rd 2.6 1.6 SE DR10 Calvert Beach Rd and Decatur Street 6.4 4.0 NW DR11 Dirt road off Mackall & Parren Rd 6.6 4.1 WNW DR12 Mackall & Bowen Rds 6.7 4.2 W

DR13 Mackall Rd, near Wallville 6.1 3.8 WSW DR14 Rodney Point 6.4 4.0 SW DR15 Mill Bridge & Turner Rds 6.2 3.9 SSW DR16 Across from Appeal School 6.5 4.1 S

DR17 Cove Point & Little Cove Point Rds 5.9 3.7 SSE DR18 Cove Point 7.1 4.5 SE DR19 Long Beach 4.4 2.8 NW DR20 On site, near shore 0.4 0.3 NNW DR21 Emergency Operations Facility (EOF) 19.3 12.1 WNW DR22 Solomons Island 12.5 7.8 S

DR23 Taylors Island, Anderson's Property 12.4 7.7 ENE IA1 Discharge Area 0.3 0.2 N

IA2 Discharge Vicinity 0.3 0.2 N

IA3 Camp Conoy 0.9 0.6 E

IA4 Patuxent River (Area not influenced by plant)

Patuxent IA5 Patuxent river River IA6 Kenwood Beach 10.7 6.7 NNW IB10 Meteorological Station 0.7 0.4 SW IB11 Meteorological Station 0.7 0.4 SW IB12 Meteorological Station 0.7 0.4 SW IB4 On site, before entrance to Camp Conoy 0.7 0.5 S

IB5 On site, before entrance to Camp Conoy 0.7 0.5 S

IB6 On site, before entrance to Camp Conoy 0.7 0.5 S

IB7 Emergency offsite facility 19.3 12.1 WNW IB8 Emergency offsite facility 19.3 12.1 WNW IB9 Emergency offsite facility 19.3 12.1 WNW SFA12 Meteorological Station 0.7 0.4 SW SFA32 NNW of ISFSI 0.6 0.4 SSW SFA42 SSE of ISFSI 0.8 0.5 SSW WA1 Intake area 0.2 0.1 NNE WA2 Discharge area 0.3 0.2 N

WB1 Shoreline at Barge Rd.

0.6 0.4 ESE 1 Distance and direction from the central point between the two containment buildings 2 Common to both the REMP and ISFSI monitoring program

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 37 Figure A-1 Map of Southern Maryland and Chesapeake Bay Showing Location of Calvert Cliffs Nuclear Power Plant

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 38 Figure A-2 Calvert Cliffs Nuclear Power Plant Sampling Locations 0-2 Miles

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 39 Figure A-3 Calvert Cliffs Nuclear Power Plant Sampling Locations 0-10 Miles

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 40 Table A-2 Locations of Environmental Sampling Stations for the Independent Spent Fuel Storage Installation at Calvert Cliffs Distance1 Direction1 Station Description (KM)

(Sector)

Air Particulate A12 On Site Before Entrance to Camp Conoy 0.3 ESE SFA12 Meteorological Station 0.3 NW SFA2 CCNPP Visitor's Center 0.8 N

SFA32 NNW of ISFSI 0.1 NNW SFA42 SSE of ISFSI 0.1 SSE Direct Radiation DR072 On Site Before Entrance to Camp Conoy 0.3 ESE DR30 Meteorological Station 0.3 NW SFDR01 SW of ISFSI 0.2 SW SFDR02 N of ISFSI 0.2 N

SFDR03 North of ISFSI 0.1 N

SFDR04 NE of ISFSI

<0.1 NE SFDR05 East of ISFSI

<0.1 E

SFDR06 ESE of ISFSI 0.1 ESE SFDR07 CCNPP Visitor's Center 0.8 N

SFDR08 NNW of ISFSI 0.1 NNW SFDR09 SSE of ISFSI 0.1 SSE SFDR10 NW of ISFSI 0.1 NW SFDR11 WNW ISFSI 0.1 WNW SFDR12 WSW of ISFSI

<0.1 WSW SFDR13 South of ISFSI

<0.1 S

SFDR14 SE of ISFSI 0.1 SE SFDR15 ENE of ISFSI

<0.1 ENE SFDR16 SW of ISFSI

<0.1 SW SFDR17 NNE of ISFSI 0.1 NNE SFDR18 West of ISFSI 0.04 W

Vegetation SFB1 ISFSI Vegetation Met Station 0.3 NW SFB2 ISFSI Vegetation Visitors Center 0.8 N

SFB3 ISFSI Vegetation NNW of ISFSI 0.1 NNW SFB4 ISFSI vegetation SSE of ISFSI 0.1 SSE SFB5 On Site Before Entrance to Camp Conoy 0.3 ESE Soil SFS1 ISFSI Soil Meteorological Station 0.3 NW SFS2 ISFSI Soil CCNPP Visitors Center 0.8 N

SFS3 ISFSI Soil NNW of ISFSI 0.1 NNW SFS4 ISFSI Soil SSE of ISFSI 0.1 SSE SFS5 ISFSI Soil On Site Before entrance to Camp Conoy 0.3 ESE 1 Distance and direction from the central point of the ISFSI 2 Common to both the REMP and ISFSI monitoring program

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 41 Figure A-4 Independent Spent Fuel Storage Installation Sampling Locations

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 42 Figure A-5 Enlarged Map of the Independent Spent Fuel Storage Installation Sampling Locations

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 43 APPENDIX B Analysis Results for the REMP and the ISFSI Appendix B is a presentation of the analytical results for the CCNPP and the ISFSI radiological environmental monitoring programs.

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 44 TABLE OF CONTENTS - ANALYTICAL RESULTS Table Title Page B-1 Concentration of Tritium and Gamma Emitters in Bay Water..........................................45 B-2 Concentration of Gamma Emitters in the Flesh of Edible Fish.........................................46 B-3 Concentration of Gamma Emitters in Oyster Samples......................................................47 B-4 Concentration of Gamma Emitters in Shoreline Sediment................................................48 B-5 Concentration of Iodine-131 in Filtered Air......................................................................49 B-6 Concentration of Beta Emitters in Air Particulates............................................................51 B-6 Concentration of Beta Emitters in Air Particulates............................................................53 B-7 Concentration of Gamma Emitters in Air Particulates......................................................55 B-8a Concentration of Gamma Emitters in Vegetation Samples...............................................56 B-8b Concentration of Gamma Emitters in Vegetation From Locations Around the ISFSI......58 B-9 Concentration of Gamma Emitters in Soil Samples From Locations Around the ISFSI..59 B-10 Typical MDA Ranges for Gamma Spectrometry..............................................................60 B-11 Typical LLDs for Gamma Spectrometry...........................................................................61 B-12 Direct Radiation.................................................................................................................62

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 45 Table B-1 Concentration of Tritium and Gamma Emitters in Bay Water (Results in units of pCi/L +/- 2)

Sample Code Sample Date Gamma Emitters H-31 WA1 Intake Vicinity 1/28/2022 3/3/2022 3/30/2022

<177 4/29/2022 6/2/2022 7/1/2022

<181 7/29/2022 9/2/2022 9/30/2022

<180 10/28/2022 11/29/2022 12/29/2022

<183 WA2 Discharge Vicinity 1/28/2022 3/3/2022 3/30/2022 187+/-117 4/29/2022 6/2/2022 7/1/2022

<175 7/29/2022 9/2/2022 9/30/2022 599 +/- 138 10/28/2022 11/29/2022 12/29/2022

<184 1 Quarterly composite of monthly samples.

All Non-Natural Gamma Emitters <MDA

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 46 Table B-2 Concentration of Gamma Emitters in the Flesh of Edible Fish (Results in units of pCi/kg (wet) +/- 2 )

Sample Code Sample Date Sample Type Gamma Emitters IA1 Discharge Area 8/24/2022 Blue Fish IA2 Discharge Area 8/24/2022 Spanish Mackerel IA41 Patuxent River 8/24/2022 Blue Fish IA51 Patuxent River 8/24/2022 Spanish Mackerel 1 Control Location

All Non-Natural Gamma Emitters <MDA

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 47 Table B-3 Concentration of Gamma Emitters in Oyster Samples (Results in units of pCi/kg (wet) +/- 2 )

Sample Code Sample Date Gamma Emitters IA3 Camp Conoy 3/25/2022 6/21/2022 8/24/2022 10/11/2022 IA61 Kenwood Beach 3/25/2022 6/21/2022 8/24/2022 10/11/2022 1 Control Location

All Non-Natural Gamma Emitters <MDA

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 48 Table B-4 Concentration of Gamma Emitters in Shoreline Sediment (Results in units of pCi/kg (dry) +/- 2)

Sample Code Sample Date Gamma Emitters WB1 Shoreline at Barge Rd.

05/02/2022 10/03/2022

All Non-Natural Gamma Emitters <MDA

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 49 Table B-5 Concentration of Iodine-131 in Filtered Air (Results in units of 10-3 pCi/m3 +/- 2)

Start Date Stop Date A1 Entrance to Camp Conoy A2 Camp Conoy Siren A3 Bay Breeze Rd A4 Route 765 at Lusby A51 EOF SFA12 Met Sta SFA3 NNW of ISFSI SFA4 SSE of ISFSI 1/4/2022 1/10/2022 1/10/2022 1/18/2022 1/18/2022 1/24/2022 1/24/2022 1/31/2022 1/31/2022 2/7/2022 2/7/2022 2/15/2022 2/15/2022 2/21/2022 2/21/2022 3/1/2022 3/1/2022 3/7/2022 3/7/2022 3/14/2022 3/14/2022 3/21/2022 3/21/2022 3/28/2022 3/28/2022 4/4/2022 4/4/2022 4/11/2022 4/11/2022 4/18/2022 4/18/2022 4/25/2022 4/25/2022 5/2/2022 5/2/2022 5/9/2022 5/9/2022 5/16/2022 5/16/2022 5/23/2022 5/23/2022 5/31/2022 5/31/2022 6/6/2022 6/6/2022 6/13/2022 6/13/2022 6/20/2022 6/20/2022 6/27/2022 6/27/2022 7/5/2022 7/5/2022 7/11/2022 7/11/2022 7/18/2022 7/18/2022 7/25/2022 7/25/2022 8/1/2022 8/1/2022 8/8/2022 8/8/2022 8/15/2022 8/15/2022 8/22/2022 8/22/2022 8/29/2022 8/29/2022 9/6/2022 9/6/2022 9/12/2022 9/12/2022 9/19/2022 9/19/2022 9/26/2022 9/26/2022 10/3/2022

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 50 Table B-5 Concentration of Iodine-131 in Filtered Air (Results in units of 10-3 pCi/m3 +/- 2)

Start Date Stop Date A1 Entrance to Camp Conoy A2 Camp Conoy Siren A3 Bay Breeze Rd A4 Route 765 at Lusby A51 EOF SFA12 Met Sta SFA3 NNW of ISFSI SFA4 SSE of ISFSI 10/3/2022 10/10/2022 10/10/2022 10/17/2022 10/17/2022 10/24/2022 10/24/2022 10/31/2022 10/31/2022 11/7/2022 11/7/2022 11/15/2022 11/15/2022 11/21/2022 11/21/2022 11/28/2022 11/28/2022 12/5/2022 12/5/2022 12/12/2022 12/12/2022 12/19/2022 12/19/2022 12/27/2022 12/27/2022 1/3/2023 1 Control Location REMP Technical Specifications

All Non-Natural Gamma Emitters <MDA

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 51 Table B-6 Concentration of Beta Emitters in Air Particulates (Results in units of 10-2 pCi/m3 +/- 2)

Start Date Stop Date A1 Entrance to Camp Conoy A2 Camp Conoy Siren A3 Bay Breeze Rd A4 Route 765 at Lusby A51 EOF 1/4/2022 1/10/2022 2.69

+/-

0.16 2.41

+/-

0.16 3.09

+/-

0.18 2.75

+/-

0.17 2.81

+/-

0.19 1/10/2022 1/18/2022 2.44

+/-

0.14 2.46

+/-

0.15 2.75

+/-

0.15 2.47

+/-

0.14 2.44

+/-

0.15 1/18/2022 1/24/2022 2.63

+/-

0.16 2.14

+/-

0.15 2.36

+/-

0.16 2.23

+/-

0.16 2.55

+/-

0.16 1/24/2022 1/31/2022 2.26

+/-

0.14 1.99

+/-

0.14 2.29

+/-

0.14 2.25

+/-

0.15 2.15

+/-

0.14 1/31/2022 2/7/2022 1.59

+/-

0.12 1.44

+/-

0.12 1.59

+/-

0.12 1.81

+/-

0.14 1.91

+/-

0.13 2/7/2022 2/15/2022 2.31

+/-

0.12 2.18

+/-

0.13 2.40

+/-

0.13 2.24

+/-

0.12 2.37

+/-

0.13 2/15/2022 2/21/2022 2.16

+/-

0.15 1.96

+/-

0.14 1.96

+/-

0.14 1.99

+/-

0.13 2.19

+/-

0.15 2/21/2022 3/1/2022 1.98

+/-

0.12 1.70

+/-

0.11 1.99

+/-

0.12 1.94

+/-

0.11 2.06

+/-

0.13 3/1/2022 3/7/2022 2.39

+/-

0.15 2.22

+/-

0.15 2.34

+/-

0.16 2.52

+/-

0.16 2.47

+/-

0.16 3/7/2022 3/14/2022 1.17

+/-

0.10 0.98

+/-

0.10 1.19

+/-

0.11 1.27

+/-

0.11 1.21

+/-

0.11 3/14/2022 3/21/2022 1.90

+/-

0.13 1.61

+/-

0.12 1.85

+/-

0.13 1.78

+/-

0.12 1.80

+/-

0.13 3/21/2022 3/28/2022 1.62

+/-

0.13 1.43

+/-

0.12 1.49

+/-

0.12 1.38

+/-

0.11 1.39

+/-

0.12 3/28/2022 4/4/2022 1.77

+/-

0.13 1.50

+/-

0.12 1.56

+/-

0.12 1.56

+/-

0.11 1.61

+/-

0.12 4/4/2022 4/11/2022 0.96

+/-

0.09 0.89

+/-

0.10 1.01

+/-

0.10 0.91

+/-

0.10 0.95

+/-

0.10 4/11/2022 4/18/2022 1.63

+/-

0.13 1.36

+/-

0.12 1.53

+/-

0.12 1.51

+/-

0.12 1.41

+/-

0.12 4/18/2022 4/25/2022 1.77

+/-

0.12 1.60

+/-

0.12 1.79

+/-

0.13 1.82

+/-

0.13 1.69

+/-

0.12 4/25/2022 5/2/2022 2.44

+/-

0.14 2.21

+/-

0.15 2.57

+/-

0.15 2.37

+/-

0.14 2.56

+/-

0.16 5/2/2022 5/9/2022 1.27

+/-

0.11 0.93

+/-

0.10 1.29

+/-

0.11 1.37

+/-

0.11 1.30

+/-

0.12 5/9/2022 5/16/2022 1.18

+/-

0.11 0.95

+/-

0.12 1.03

+/-

0.10 1.16

+/-

0.11 1.17

+/-

0.12 5/16/2022 5/23/2022 2.01

+/-

0.13 1.66

+/-

0.14 1.94

+/-

0.13 2.15

+/-

0.13 2.14

+/-

0.14 5/23/2022 5/31/2022 1.35

+/-

0.11 1.00

+/-

0.11 1.27

+/-

0.10 1.34

+/-

0.10 1.24

+/-

0.11 5/31/2022 6/6/2022 2.28

+/-

0.09 1.75

+/-

0.08 2.31

+/-

0.09 2.35

+/-

0.09 2.19

+/-

0.09 6/6/2022 6/13/2022 1.58

+/-

0.10 1.46

+/-

0.16 1.50

+/-

0.18 1.59

+/-

0.17 1.61

+/-

0.18 6/13/2022 6/20/2022 2.01

+/-

0.11 1.73

+/-

0.11 1.70

+/-

0.11 2.04

+/-

0.10 1.96

+/-

0.12 6/20/2022 6/27/2022 1.82

+/-

0.14 1.60

+/-

0.14 1.78

+/-

0.12 1.81

+/-

0.13 1.96

+/-

0.14 6/27/2022 7/5/2022 1.79

+/-

0.12 1.50

+/-

0.12 1.65

+/-

0.12 1.76

+/-

0.12 1.78

+/-

0.13 7/5/2022 7/11/2022 2.08

+/-

0.12 1.69

+/-

0.12 1.83

+/-

0.13 1.99

+/-

0.13 2.04

+/-

0.13 7/11/2022 7/18/2022 2.30

+/-

0.13 1.91

+/-

0.12 2.04

+/-

0.12 2.27

+/-

0.13 2.03

+/-

0.14 7/18/2022 7/25/2022 2.73

+/-

0.13 2.18

+/-

0.12 2.67

+/-

0.12 2.90

+/-

0.12 2.84

+/-

0.11 7/25/2022 8/1/2022 2.05

+/-

0.18 1.88

+/-

0.16 2.02

+/-

0.18 1.98

+/-

0.20 2.13

+/-

0.19

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 52 Table B-6 Concentration of Beta Emitters in Air Particulates (Results in units of 10-2 pCi/m3 +/- 2)

Start Date Stop Date A1 Entrance to Camp Conoy A2 Camp Conoy Siren A3 Bay Breeze Rd A4 Route 765 at Lusby A51 EOF 8/1/2022 8/8/2022 1.98

+/-

0.14 1.73

+/-

0.14 1.97

+/-

0.14 2.06

+/-

0.13 1.94

+/-

0.15 8/8/2022 8/15/2022 1.84

+/-

0.14 1.48

+/-

0.14 1.63

+/-

0.15 1.78

+/-

0.15 1.70

+/-

0.14 8/15/2022 8/22/2022 2.06

+/-

0.12 1.63

+/-

0.11 1.87

+/-

0.11 2.12

+/-

0.11 2.26

+/-

0.11 8/22/2022 8/29/2022 3.40

+/-

0.10 2.99

+/-

0.08 3.57

+/-

0.09 3.64

+/-

0.10 3.85

+/-

0.10 8/29/2022 9/6/2022 3.29

+/-

0.13 1.57

+/-

0.12 1.84

+/-

0.12 2.04

+/-

0.13 2.23

+/-

0.14 9/6/2022 9/12/2022 1.50

+/-

0.13 1.25

+/-

0.12 1.41

+/-

0.13 1.42

+/-

0.13 1.52

+/-

0.13 9/12/2022 9/19/2022 2.67

+/-

0.15 2.23

+/-

0.14 2.39

+/-

0.14 2.67

+/-

0.15 2.57

+/-

0.15 9/19/2022 9/26/2022 3.57

+/-

0.17 3.17

+/-

0.17 3.27

+/-

0.16 3.83

+/-

0.18 3.64

+/-

0.17 9/26/2022 10/3/2022 1.54

+/-

0.12 1.51

+/-

0.12 1.39

+/-

0.12 1.59

+/-

0.12 1.42

+/-

0.12 10/3/2022 10/10/2022 1.82

+/-

0.13 1.83

+/-

0.13 1.56

+/-

0.12 1.89

+/-

0.13 1.95

+/-

0.12 10/10/2022 10/17/2022 3.10

+/-

0.16 3.15

+/-

0.16 3.01

+/-

0.16 3.37

+/-

0.17 3.38

+/-

0.18 10/17/2022 10/24/2022 2.33

+/-

0.14 2.22

+/-

0.14 2.13

+/-

0.14 2.35

+/-

0.14 2.48

+/-

0.15 10/24/2022 10/31/2022 1.09

+/-

0.10 1.14

+/-

0.10 1.03

+/-

0.10 1.17

+/-

0.11 1.16

+/-

0.10 10/31/2022 11/7/2022 1.98

+/-

0.15 2.11

+/-

0.14 2.08

+/-

0.14 2.27

+/-

0.14 2.20

+/-

0.14 11/7/2022 11/15/2022 1.47

+/-

0.11 1.51

+/-

0.11 1.46

+/-

0.11 1.57

+/-

0.12 1.66

+/-

0.11 11/15/2022 11/21/2022 2.60

+/-

0.16 2.73

+/-

0.16 2.70

+/-

0.16 3.25

+/-

0.19 2.98

+/-

0.17 11/21/2022 11/28/2022 4.12

+/-

0.18 4.33

+/-

0.18 4.14

+/-

0.18 4.77

+/-

0.19 4.44

+/-

0.18 11/28/2022 12/5/2022 3.05

+/-

0.16 3.23

+/-

0.16 2.95

+/-

0.15 3.41

+/-

0.16 3.26

+/-

0.16 12/5/2022 12/12/2022 2.55

+/-

0.14 2.89

+/-

0.15 2.63

+/-

0.15 3.23

+/-

0.16 3.13

+/-

0.16 12/12/2022 12/19/2022 2.10

+/-

0.14 2.05

+/-

0.14 2.08

+/-

0.14 2.35

+/-

0.14 2.20

+/-

0.14 12/19/2022 12/27/2022 2.54

+/-

0.13 2.60

+/-

0.14 2.62

+/-

0.14 3.05

+/-

0.15 3.01

+/-

0.14 12/27/2022 1/3/2023 2.60

+/-

0.14 2.68

+/-

0.14 2.77

+/-

0.15 2.93

+/-

0.15 2.94

+/-

0.14 1 Control Location

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 53 Table B Continued Concentration of Beta Emitters in Air Particulates (Results in units of 10-2 pCi/m3 +/- 2)

Start Date Stop Date SFA1 Met Station SFA21 Visitors Center SFA3 NNW of ISFSI SFA4 SSE of ISFSI 1/4/2022 1/10/2022 3.13

+/-

0.17 2.68

+/-

0.16 2.87

+/-

0.17 2.70

+/-

0.16 1/10/2022 1/18/2022 2.45

+/-

0.14 2.31

+/-

0.13 2.70

+/-

0.14 2.54

+/-

0.14 1/18/2022 1/24/2022 2.54

+/-

0.16 2.35

+/-

0.16 2.71

+/-

0.17 2.30

+/-

0.15 1/24/2022 1/31/2022 2.28

+/-

0.14 2.00

+/-

0.14 2.42

+/-

0.15 2.26

+/-

0.14 1/31/2022 2/7/2022 1.60

+/-

0.12 1.52

+/-

0.12 1.72

+/-

0.13 1.82

+/-

0.13 2/7/2022 2/15/2022 2.43

+/-

0.13 2.44

+/-

0.13 2.50

+/-

0.14 2.31

+/-

0.13 2/15/2022 2/21/2022 2.14

+/-

0.15 2.16

+/-

0.14 2.18

+/-

0.15 1.92

+/-

0.14 2/21/2022 3/1/2022 1.94

+/-

0.12 2.10

+/-

0.12 2.06

+/-

0.13 1.86

+/-

0.12 3/1/2022 3/7/2022 2.46

+/-

0.16 2.51

+/-

0.15 2.38

+/-

0.16 2.16

+/-

0.15 3/7/2022 3/14/2022 1.23

+/-

0.11 1.29

+/-

0.11 1.29

+/-

0.11 1.11

+/-

0.11 3/14/2022 3/21/2022 1.85

+/-

0.13 1.91

+/-

0.13 1.86

+/-

0.13 1.77

+/-

0.13 3/21/2022 3/28/2022 1.32

+/-

0.12 1.59

+/-

0.12 1.52

+/-

0.12 1.29

+/-

0.12 3/28/2022 4/4/2022 1.52

+/-

0.12 1.52

+/-

0.11 1.49

+/-

0.12 1.57

+/-

0.12 4/4/2022 4/11/2022 0.99

+/-

0.10 1.08

+/-

0.10 0.97

+/-

0.10 0.97

+/-

0.10 4/11/2022 4/18/2022 1.44

+/-

0.12 1.60

+/-

0.12 1.51

+/-

0.12 1.45

+/-

0.12 4/18/2022 4/25/2022 1.59

+/-

0.12 1.83

+/-

0.12 1.62

+/-

0.12 1.70

+/-

0.12 4/25/2022 5/2/2022 2.24

+/-

0.15 2.17

+/-

0.13 2.26

+/-

0.14 2.17

+/-

0.14 5/2/2022 5/9/2022 1.15

+/-

0.12 1.34

+/-

0.11 1.29

+/-

0.11 1.20

+/-

0.11 5/9/2022 5/16/2022 1.08

+/-

0.11 1.02

+/-

0.10 0.99

+/-

0.10 1.06

+/-

0.11 5/16/2022 5/23/2022 1.96

+/-

0.14 2.01

+/-

0.12 2.07

+/-

0.14 1.77

+/-

0.13 5/23/2022 5/31/2022 1.20

+/-

0.11 1.38

+/-

0.10 1.16

+/-

0.10 1.20

+/-

0.10 5/31/2022 6/6/2022 2.12

+/-

0.09 2.40

+/-

0.08 2.39

+/-

0.08 2.00

+/-

0.09 6/6/2022 6/13/2022 1.57

+/-

0.18 1.54

+/-

0.17 1.42

+/-

0.20 1.40

+/-

0.17 6/13/2022 6/20/2022 1.79

+/-

0.11 1.96

+/-

0.10 1.91

+/-

0.10 1.66

+/-

0.11 6/20/2022 6/27/2022 1.58

+/-

0.13 1.92

+/-

0.13 1.74

+/-

0.14 1.62

+/-

0.13 6/27/2022 7/5/2022 1.54

+/-

0.11 1.72

+/-

0.12 1.67

+/-

0.12 1.51

+/-

0.12 7/5/2022 7/11/2022 1.83

+/-

0.12 1.97

+/-

0.12 1.75

+/-

0.13 1.80

+/-

0.12 7/11/2022 7/18/2022 1.87

+/-

0.12 2.16

+/-

0.12 2.01

+/-

0.12 1.84

+/-

0.13 7/18/2022 7/25/2022 2.69

+/-

0.10 2.81

+/-

0.11 2.71

+/-

0.11 2.46

+/-

0.11 7/25/2022 8/1/2022 1.75

+/-

0.18 2.16

+/-

0.17 1.92

+/-

0.19 1.90

+/-

0.17

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 54 Table B Continued Concentration of Beta Emitters in Air Particulates (Results in units of 10-2 pCi/m3 +/- 2)

Start Date Stop Date SFA1 Met Station SFA21 Visitors Center SFA3 NNW of ISFSI SFA4 SSE of ISFSI 8/1/2022 8/8/2022 1.84

+/-

0.12 1.91

+/-

0.14 1.98

+/-

0.13 1.84

+/-

0.14 8/8/2022 8/15/2022 1.67

+/-

0.13 1.71

+/-

0.13 1.58

+/-

0.15 1.47

+/-

0.15 8/15/2022 8/22/2022 1.81

+/-

0.12 1.92

+/-

0.11 1.73

+/-

0.12 1.65

+/-

0.11 8/22/2022 8/29/2022 3.17

+/-

0.09 3.34

+/-

0.09 3.52

+/-

0.08 3.23

+/-

0.08 8/29/2022 9/6/2022 1.91

+/-

0.13 1.93

+/-

0.12 1.77

+/-

0.12 1.66

+/-

0.12 9/6/2022 9/12/2022 1.36

+/-

0.13 1.51

+/-

0.13 1.41

+/-

0.13 1.30

+/-

0.12 9/12/2022 9/19/2022 2.49

+/-

0.15 2.68

+/-

0.15 2.45

+/-

0.15 2.19

+/-

0.14 9/19/2022 9/26/2022 3.40

+/-

0.17 3.69

+/-

0.17 3.39

+/-

0.17 3.05

+/-

0.16 9/26/2022 10/3/2022 1.44

+/-

0.11 1.38

+/-

0.11 1.33

+/-

0.11 1.23

+/-

0.11 10/3/2022 10/10/2022 1.72

+/-

0.12 1.86

+/-

0.13 1.77

+/-

0.13 1.36

+/-

0.11 10/10/2022 10/17/2022 3.39

+/-

0.17 3.56

+/-

0.17 3.02

+/-

0.17 2.95

+/-

0.16 10/17/2022 10/24/2022 2.34

+/-

0.14 2.30

+/-

0.14 2.05

+/-

0.13 2.02

+/-

0.13 10/24/2022 10/31/2022 1.00

+/-

0.10 0.99

+/-

0.10 0.90

+/-

0.10 0.89

+/-

0.10 10/31/2022 11/7/2022 1.70

+/-

0.12 1.64

+/-

0.12 1.71

+/-

0.13 1.68

+/-

0.13 11/7/2022 11/15/2022 1.47

+/-

0.11 1.54

+/-

0.11 1.23

+/-

0.10 1.32

+/-

0.11 11/15/2022 11/21/2022 2.90

+/-

0.16 2.93

+/-

0.17 2.54

+/-

0.16 2.53

+/-

0.16 11/21/2022 11/28/2022 4.36

+/-

0.18 4.46

+/-

0.19 3.86

+/-

0.17 3.84

+/-

0.18 11/28/2022 12/5/2022 3.27

+/-

0.16 3.13

+/-

0.16 2.95

+/-

0.15 2.80

+/-

0.15 12/5/2022 12/12/2022 3.05

+/-

0.16 2.92

+/-

0.15 2.48

+/-

0.14 2.70

+/-

0.15 12/12/2022 12/19/2022 2.24

+/-

0.14 2.23

+/-

0.14 1.85

+/-

0.13 2.02

+/-

0.13 12/19/2022 12/27/2022 2.91

+/-

0.14 2.81

+/-

0.14 2.50

+/-

0.13 2.60

+/-

0.14 12/27/2022 1/3/2023 2.92

+/-

0.15 2.89

+/-

0.15 2.56

+/-

0.14 2.52

+/-

0.14 1 Control Location

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 55 Table B-7 Concentration of Gamma Emitters in Air Particulates (Results in units of 10-3 pCi/m3 +/- 2)

Sample Date A1 Entrance to Camp Conoy A2 Camp Conoy Siren A3 Bay Breeze Rd A4 Route 765 at Lusby A51 EOF 3/28/2022 6/27/2022 10/3/2022 1/3/2023 Sample Date SFA1 MET Station SFA21 Visitors Center SFA3 NNW of ISFSI SFA4 SSE of ISFSI 3/28/2022 6/27/2022 10/3/2022 1/3/2023 1 Control Location

All Non-Natural Gamma Emitters <MDA

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 56 Table B-8a Concentration of Gamma Emitters in Vegetation Samples (Results in units of pCi/kg (wet) +/- 2 )

Sample Code Sample Date Sample Type Gamma Emitters IB4 6/27/2022 Kale Camp Conoy 7/25/2022 Cabbage Entrance 8/22/2022 Cabbage 9/19/2022 Collards IB5 6/27/2022 Cabbage Camp Conoy 7/25/2022 Kale Entrance 8/22/2022 Kale 9/19/2022 Kale IB6 6/27/2022 Collards Camp Conoy 7/25/2022 Collards Entrance 8/22/2022 Collards 9/19/2022 Swiss Chard IB71 6/27/2022 Kale EOF 7/25/2022 Cabbage 8/22/2022 Kale 9/19/2022 Kale IB81 6/27/2022 Cabbage EOF 7/25/2022 Kale 8/22/2022 Collards 9/19/2022 Collards IB91 6/27/2022 Collards EOF 7/25/2022 Collards 8/22/2022 Swiss Chard 9/19/2022 Zucchini

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 57 Table B-8a Concentration of Gamma Emitters in Vegetation Samples (Results in units of pCi/kg (wet) +/- 2 )

Sample Code Sample Date Sample Type Gamma Emitters IB10 6/27/2022 Cabbage Met Station 7/25/2022 Kale 8/22/2022 Cabbage 9/19/2022 Collards IB11 6/27/2022 Kale Met Station 7/25/2022 Kale 8/22/2022 Kale 9/19/2022 Kale IB12 6/27/2022 Collards Met Station 7/25/2022 Collards 8/22/2022 Collards 9/19/2022 Swiss Chard 1 Control Garden

All Non-Natural Gamma Emitters <MDA

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 58 Table B-8b Concentration of Gamma Emitters in Vegetation From Locations Around the ISFSI (Results in units of pCi/kg (wet) +/- 2 Sample Code Sample Date Gamma Emitters SFB1 MET Station 2/21/2022 6/6/2022 8/15/2022 11/15/2022 SFB21 Visitor's Center 2/21/2022 6/6/2022 8/15/2022 11/15/2022 SFB3 NNW of ISFSI 2/21/2022 6/6/2022 8/15/2022 11/15/2022 SFB4 SSE of ISFSI 2/21/2022 6/6/2022 8/15/2022 11/15/2022 SFB5 On Site Before Entrance to Camp Conoy 2/21/2022 6/6/2022 8/15/2022 11/15/2022 1 Control Location

All Non-Natural Gamma Emitters <MDA

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 59 Table B-9 Concentration of Gamma Emitters in Soil Samples From Locations Around the ISFSI (Results in units of pCi/kg (dry) +/- 2)

Sample Code Sample Date Cs-137 Gamma Emitters SFS1 MET station 2/21/2022 1

6/6/2022 1

8/15/2022 1

11/15/2022 1

SFS22 Visitors Center 2/21/2022 1

6/6/2022 1

8/15/2022 1

11/15/2022 1

SFS3 NNW of ISFSI 2/21/2022 146 +/- 62 6/6/2022 140 +/- 46 8/15/2022 1

11/15/2022 133 +/- 55 SFS4 SSE of ISFSI 2/21/2022 1

6/6/2022 1

8/15/2022 1

11/15/2022 1

SFS5 Entrance to Camp Conoy 2/21/2022 1

6/6/2022 70.6 +/- 46 8/15/2022 1

11/15/2022 1

1 This isotope <MDA 2 Control Location

All Non-Natural Gamma Emitters <MDA except where Cs-137 is observed and reported

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 60 Table B-10 Typical MDA Ranges for Gamma Spectrometry Selected Nuclides Air Particulates (10-3 pCi/m3)

Bay Water, Surface

Water, Drinking Water (pCi/L)

Fish (pCi/kg) Wet Ground water (pCi/L)

Milk (pCi/L)

Oysters (pCi/kg)

Shoreline Sediment (pCi/kg) Dry Soil (pCi/kg)

Dry Vegetation (pCi/kg) Wet K-40 5.65 - 24.6 16 - 182 2,747 - 4,505 21.5 -66.4 1,286 - 1,529 1,269 - 2,069 781 - 13,761 789 - 10,713 671 - 11,829 Mn-54 0.32 - 1.16 2.7 - 5.6 9.8 - 19.6 2.86 - 5.14 3.6 - 6.6 10.8 - 16.4 41.4 - 67.1 37.4 - 91.9 10.3 - 53.0 Fe-59 1.01 - 8.52 5.6 - 13.2 31.6 - 93.2 6.04 - 11.7 9.2 - 15.9 29.3 - 56.7 142 - 251 96.4 - 389 22.0 - 151 Co-58 0.38 - 2.07 2.7 - 5.6 10.9 - 28.3 2.86 - 5.27 3.7 - 6.3 10.5 - 19.3 53.7 - 82.9 44.6 - 133 10.9 - 59.8 Co-60 0.28 - 1.09 2.8 - 5.5 10.9 - 24.3 3.01 - 5.38 4.1 - 7.2 11.7 - 17.0 38.6 - 57.9 32.8 - 85.8 12.9 - 55.0 Zn-65 0.81 - 3.10 5.5 - 11.4 23.3 - 57.2 6.41 - 14.4 9.4 - 16.1 22.0 - 43.3 112 - 198 96.4 - 275 24.7 - 116 Ag-110m 0.33 - 1.06 2.42 - 4.96 8.2 - 18.1 2.79 - 5.06 3.26-5.64 8.7 - 16.0 36.6 - 175 40.7 - 99.4 10.1 - 61.4 Zr-95 0.72 - 3.88 4.7 - 10.2 20.0 - 47.1 5.62 - 8.75 5.8 - 11.5 19.0 - 34.0 93.5 - 151 84.6 - 261 19.3 - 116 Nb-95 0.56 - 4.91 2.9 - 6.0 13.7 - 42.7 3.3 - 5.88 3.9 - 6.5 13.9 - 24.3 82.1 - 157 61.5 - 227 10.9 - 90.5 Ru-106 3.00 - 12.1 23.8 - 48.1 77.1 - 197 25.6 - 45.3 29.3 - 51.8 88.0 - 141 327.0 - 570 314.0 - 840 92.9 - 541 I-1311 2.73 - 914 0.52 - 11.7 21.4 - 2,340 4.87 - 9.04 0.5 - 7.03 22.4 - 107 470 - 2,040 139 - 8,060 13.4 - 854 Cs-134 0.47 - 0.88 3.2 - 5.7 7.8 - 16.0 2.92 - 5.48 4.09 - 4.82 9.7 - 16.5 43.3 - 82.4 33.4 - 109 11.1 - 58.1 Cs-137 0.46 - 0.88 3.7 - 5.9 3.8 - 17.5 2.97 - 5.43 4.08 - 5.29 10.0 - 16.7 38.4 - 65.4 39.1 - 135 11.1 - 62.3 La-140 2.01 - 116 5.05 - 11.5 15.9 - 444 4.87 - 10.3 4.89 - 6.28 24.1 - 80.4 368 - 773 136 - 1,820 9.1 - 388 Ba-140 2.01 - 116 5.05 - 11.5 15.9 - 444 5.86 - 26.0 4.89 - 6.28 24.1 - 80.4 368 - 773 136 - 1,820 9.1 - 388 Ce-144 1.12 - 3.27 16.8 - 36.7 38.1 - 70.9 17.8 - 32.0 20.5 - 31.0 42.6 - 72.6 208 - 279 191 - 414 46.6 - 289 Cr-51 4.90 - 45.0 23.2 - 50.6 93.0 - 395 26.7 - 42.1 30.4 - 46.8 97.0 - 199 711 - 1,110 489 - 1,810 93.9 - 850 Na-22 0.34 - 1.33 2.7 - 6.0 12.1 - 28.0 2.78 - 5.94 4.9 - 8.5 13.4 - 19.5 46.4 - 77.4 36.4 - 92.4 8.9 - 54.1 1 This MDA range for I-131 on a charcoal cartridge is typically 5.22 x 10-3 to 1.37 x 10-2 pCi/m3

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 61 Table B-11 Typical LLDs for Gamma Spectrometry Selected Nuclides Air Particulates 10-3 pCi/m3 Bay Water, Surface Water, Drinking Water pCi/L Fish pCi/kg (wet)

Ground water pCi/L Oysters pCi/kg (wet)

Milk pCi/L Soil pCi/kg (dry)

Vegetation pCi/kg (wet)

Na-22 5

5.3 12 5.3 12 9.1 78 27 Cr-51 74 37 76 37 76 62 452 174 Mn-54 4.6 4.7 13 4.7 13 7.4 63 19 Co-58 6.7 4.3 12 4.3 12 8.2 78 23 Fe-59 20 11 27 11 27 18 123 57 Co-60 3.5 4.8 12 4.8 12 7.5 59 24 Zn-65 8.9 11 27 11 27 17 162 55 Nb-95 9.8 4.5 13 4.5 13 9.5 73 25 Zr-95 11 7.9 18 7.9 18 14 117 34 Ru-106 43 38 111 38 111 62 624 174 Ag-110m 4.2 4.3 11 4.3 11 6

65 20 Te-129m 101 56 118 56 118 90 833 263 I-131*

90 0.8 11 6.4 11 0.8 58 42 Cs-134 4.7 4.7 11 4.7 11 6.7 66 18 Cs-137 4.2 5.1 11 5.1 11 6.9 78 21 Ba-140 47 23 39 23 39 46 103 111 La-140 47 9.2 15 9.2 15 13 103 30 Ce-144 15 23 45 23 45 37 288 70

The LLD for I-131 measured on a charcoal cartridge is 3.7 x10-2 pCi/m3

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 62 Table B-12 Direct Radiation (Results in Units of mrem/91 days +/- 2)

Site Code Location First Quarter Second Quarter Third Quarter Fourth Quarter Mean +/- 2 Stdev DR01 On Site, along Cliffs 13.6 13.5 11.5 12.4 12.8

+/-

2.0 DR02 Route 765, Auto Dump 10.0 10.9 11.5 11.3 10.9

+/-

1.3 DR03 Route 765, Giovanni's Tavern 11.1 11.3 9.68 10.3 10.6

+/-

1.5 DR04 Route 765, across from Vera's Beach Club 12.7 12.8 14.1 13.4 13.3

+/-

1.3 DR05 Route 765, John's Creek 12.4 14.5 11.7 13.1 12.9

+/-

2.4 DR06 Route 765 at Lusby 9.98 9.49 11.6 10.3 10.3

+/-

1.8 DR07 Entrance to Camp Conoy 11.2 10.1 11.3 11.6 11.1

+/-

1.3 DR08 Camp Conoy Rd at Emergency Siren 14.9 16.9 13.1 13.2 14.5

+/-

3.6 DR09 Bay Breeze Rd 11.1 11.2 11.3 10.2 11.0

+/-

1.0 DR10 Calvert Beach Rd and Decatur Street 10.3 11.2 10.2 10.2 10.5

+/-

1.0 DR11 Dirt road off Mackall & Parren Rd 12.0 12.3 13.2 11.5 12.3

+/-

1.4 DR12 Mackall & Bowen Rds 11.0 10.6 12.3 9.98 11.0

+/-

2.0

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 63 DR13 Mackall Rd, near Wallville 11.8 11.7 12.6 32.0 17.0

+/-

20.0 DR14 Rodney Point 13.4 12.8 14.1 11.5 13.0

+/-

2.2 DR15 Mill Bridge & Turner Rds 12.0 11.6 12.3 11.6 11.9

+/-

0.7 DR16 Across from Appeal School 10.9 12.2 11.1 12.2 11.6

+/-

1.4 DR17 Cove Point & Little Cove Point Rds 13.9 13.1 14.4 12.5 13.5

+/-

1.7 DR18 Cove Point 10.4 10.1 10.2 8.69 9.8

+/-

1.6 DR19 Long Beach 12.0 12.5 12.5 10.7 11.9

+/-

1.7 DR20 On site, near shore 13.4 14.1 14.1 14.1 13.9

+/-

0.7 DR211 EOF 14.7 12.6 14.9 12.9 13.8

+/-

2.4 DR221 Solomons Island 11.8 12.0 13.1 11.2 12.1

+/-

1.6 DR231 Taylors Island 17.2 17.4 No data*

16.4 17.0

+/-

1.1 DR30 MET Station 12.3 12.4 12.8 9.8 11.8

+/-

2.7 SFDR01 SW of ISFSI 17.5 16.8 18.9 18.8 18.0

+/-

2.0 SFDR02 NNW of ISFSI 18 18.4 19.9 17.2 18.4

+/-

2.3 SFDR03 North of ISFSI 28.6 29.8 32.2 29.4 30.0

+/-

3.1 SFDR04 NE of ISFSI 43.9 41.2 43.4 48.1 44.2

+/-

5.8

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 64 SFDR05 East of ISFSI 42.1 39.5 46 39.3 41.7

+/-

6.2 SFDR06 ESE of ISFSI 23.5 22.7 24.6 29.4 25.1

+/-

6.0 SFDR071 Visitor's Center 15.1 14.9 14.6 14.4 14.8

+/-

0.6 SFDR08 NNW of ISFSI 24.8 24.1 25.3 53.3 31.9

+/-

28.6 SFDR09 SSE of ISFSI 62.8 62.8 59.5 39.8 56.2

+/-

22.1 SFDR10 NW of ISFSI 27.2 26.4 24.0 25.7 25.8

+/-

2.7 SFDR11 WNW ISFSI 26.8 25.2 25.1 23.4 25.1

+/-

2.8 SFDR12 WSW of ISFSI 39.8 36.6 42.3 33.4 38.0

+/-

7.7 SFDR13 South of ISFSI 49.2 49.2 82 127 76.9

+/-

73.7 SFDR14 SE of ISFSI 81.9 79.4 89.2 78.2 82.2

+/-

9.9 SFDR15 ENE of ISFSI 39.4 37 43.5 50 42.5

+/-

11.4 SFDR16 SSW of ISFSI 57.0 48.4 58.7 80.4 61.1

+/-

27.2 SFDR17 NNE of ISFSI 37.5 38.4 38.2 37.2 37.8

+/-

1.1 SFDR18 NNE of ISFSI 39.7 36.9 39.3 35.0 37.8

+/-

1.1 1 Control Location

Missing dosimeter No Data

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 65 APPENDIX C Quality Assurance Program Appendix C is a summary of Constellation Generation Solutions (CGS) laboratorys quality assurance program. It consists of Table C-1 which is a compilation of the results of the CGS laboratorys participation in an interlaboratory comparison program with Environmental Resource Associates (ERA) located in Arvada, Colorado and Eckert and Ziegler Analytics, Inc. (EZA) located in Atlanta, Georgia.

It also includes Table C-2, which is a compilation of the results of the Constellation Generation Solutions (CGS) Laboratorys participation in a split sample program with Teledyne Brown Engineering located in Knoxville, Tennessee, and Table C-3, which is a list of the Site Specific LLDs required by the ODCM.

The CGS laboratory's results contained in Table C-1, intercomparison results, are in full agreement when they were evaluated using the NRC Resolution Test Criteria [1] except as noted in the Pass/Fail column and described below. The CGS laboratory's results are provided with their analytical uncertainties of 2 sigma. When evaluating with the NRC Resolution Test a one sigma uncertainty is used to determine Pass or Fail and noted accordingly.

All results reported passed their respective vendor acceptance ranges and NRC Resolution Test Criteria [1] with one exception for the Gross Beta Study ERA RAD 129, reference date 4/4/2022. The CGS result passed the low end of vendor acceptance criteria but failed NRC Resolution Test Criteria. Low recovery of activity was likely due to an ineffective residue correction factor that undercompensates for the significant residue weight present in the study accounting for the low result reported. This low value and a low uncertainty in turn resulted in an NRC Resolution Test Criteria Failure. A set of 3rd party, NIST traceable standards has been procured to build a residue correction curve for more accurate results going forward. This event has been entered into the Corrective Action Program for tracking and to prevent future occurrence.

All results reported passed their respective vendor acceptance ranges and NRC Resolution Test Criteria [1]

The vendor laboratories used by CGS for subcontracting and interlaboratory comparison samples, GEL Laboratories and Teledyne Brown Engineering, also participate in the ERA and EZA interlaboratory comparison program. A presentation of their full data report is provided in their Annual Environmental Quality Assurance Program Reports, (Ref 14,15).

In summary Gel and TBE reported results met vendor and laboratory acceptance ranges with the following exceptions discussed here:

1. TBE result for Air particulate Ce-144 submitted for a study in March 2022 failed the upper acceptance limit. The laboratory investigated and the study results were outside the acceptable range specified in TBE's QA plan, 70-130% of True Value, but would have been acceptable when taking the uncertainty into account.

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 66 A duplicate study was analyzed on two other detectors and passed the upper acceptance limit. In both cases TBE's published QA requirements of acceptable range being 70-130% of True value were met. The lab's performance is within the acceptable range specified in their QA plan. This same range is considered acceptable by Constellation Nuclear Quality Assurance Requirements as well.

TBE states in their investigation that there was no impact to sample data and no further action is warranted.

2. TBE result for Air particulate Co-60 study in September 2022 failed the upper acceptance limit. The laboratory investigated and the study results were outside the acceptable range specified in TBE's QA plan, 70-130% of True Value. The study was analyzed as a duplicate on another detector and passed within 114% of True Value. Historical results for Air particulate Co-60 have ranged from 91% -

141% with a mean of 91%. The lab determined no correction action needed at this time as it is the first failure for this nuclide for Air particulate.

3. GEL results for MRAD-37 Sr-90 failed vendor acceptance criteria, exceeding the maximum range for both Vegetation and water. The laboratory review did not reveal any gross errors or possible contributors to the high bias. During this same analysis time period the laboratory successfully analyzed these same matrices in PT for MAPEP-47 which required the same preparation and analysis processes and procedures. The lab will continue to monitor the recoveries of these parameters to ensure there are no continued issues.

The Inter and Intra laboratory results contained in Table C-2 are intercomparison results for routine samples analyzed for replicate and split analyses and evaluated for beta and non-natural gamma emitters. The CGS laboratorys results are provided with their analytical uncertainties of 2 sigma.

When evaluating with the NRC Resolution Test a one sigma uncertainty is used to determine Pass or Fail and noted accordingly. In the event there are no non-natural isotopes detected, the samples are reported <MDA and designated as Pass.

There were three of the 4 quarterly samples for soil at SFS3 that indicated low level, Non Plant related Cs-137 just above the analyses Minimum Detectable Activity. This activity has been investigated previously and levels are in trend with historical data at this location.

1. The original analysis of soil collected on February 21, 2022, at SFS3 indicated low level, Non Plant related Cs-137 just above the analyses Minimum Detectable Activity at 146 +/-

61.9 pCi/kg. The replicate and split samples also indicated Cs-137 above the Minimum Detectable Activity, MDA, at 212 +/-37.5 pCi/kg and 141+/-83.0 pCi/kg, respectively.

2. The original analysis of soil collected on June 6, 2022, at SFS3 indicated low level, Non Plant related Cs-137 just above the analyses Minimum Detectable Activity at 140 +/- 56.2 pCi/kg. The replicate analysis confirmed Cs-137 above the Minimum Detectable Activity, MDA, at 98.9 +/-52.3 pCi/kg and results are in agreement when evaluated using the NRC Resolution Test Criteria1.

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 67

3. The original analysis of soil collected on November 15, 2022, at SFS3 indicated low level, Non Plant related Cs-137 just above the analyses Minimum Detectable Activity at 133 +/-

55.3 pCi/kg. The replicate analysis confirmed Cs-137 above the Minimum Detectable Activity, MDA, at 169 +/-61.3 pCi/kg and these results are in agreement when evaluated using the NRC Resolution Test Criteria1.

The original, replicate and split results pass the NRC Resolution Test Criteria1, as specified in the rule. The low-level Cs-137 observed in these soil analyses is consistent with weapons related fallout previously identified in the environs around Calvert Cliffs Nuclear Power Plant.

All air particulate samples contain Beta emitters and are reported with a 2sigma uncertainty. The original and replicate analyses are evaluated for agreement using the NRC Resolution Test Criteria1. These samples must be composited for further analysis and this precludes them from being split for analysis of beta emitters. These filters and other samples whose nature generally preclude sample splitting are marked ** in the Split Analysis column 1 NRC Inspection Manual, Inspection Procedure 84750, March 15, 1994

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 68 TABLE OF CONTENTS - ANALYTICAL RESULTS Table Title Page C-1 Results of Participation in Cross Check Programs................................................................69 C-2 Results of Quality Assurance Program..................................................................................75 C-3 Calvert Cliffs Nuclear Power Plant ODCM Required LLDs.................................................89

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 69 Sample Date Vendor Study ID Sample Type Units Equip ID Isotope Observed Reported Laboratory's Results Cross Check Lab Results NRC Resolution Test Pass / Fail 1 3/10/2022 ANA E13643 Milk Gamma pCi/L D4 Ce-141 58.6

+/-

11.5 64.6 Pass Co-58 160

+/-

15.6 164 Pass Co-60 313

+/-

15.8 302 Pass Cr-51 390

+/-

95.0 339 Pass Cs-134 168

+/-

8.98 182 Pass Cs-137 222

+/-

17.4 223 Pass Fe-59 185

+/-

20.8 185 Pass I-131 98.9

+/-

21.6 96.7 Pass Mn-54 157

+/-

14.8 164 Pass Zn-65 231

+/-

31.7 246 Pass 3/10/2022 ANA E13643 Milk Gamma pCi/L D5 Ce-141 71.6

+/-

16.3 64.6 Pass Co-58 164

+/-

15.1 164 Pass Co-60 302

+/-

14.8 302 Pass Cr-51 398

+/-

107 339 Pass Cs-134 168

+/-

9.67 182 Pass Cs-137 212

+/-

16.0 223 Pass Fe-59 207

+/-

21.3 185 Pass I-131 96.2

+/-

26.7 96.7 Pass Mn-54 166

+/-

15.0 164 Pass Zn-65 230

+/-

31.0 246 Pass 3/10/2022 ANA E13644 Water Beta pCi/L S5E Cs-137 224

+/-

4.43 222 Pass Table C-1 Results of Participation in Cross Check Programs

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 70 Sample Date Vendor Study ID Sample Type Units Equip ID Isotope Observed Reported Laboratory's Results Cross Check Lab Results NRC Resolution Test Pass / Fail 1 3/10/2022 ANA E13645 Cartridge Gamma pCi D2 I-131 81.9

+/-

8.35 88.2 Pass D3 I-131 84.7

+/-

7.96 88.2 Pass D4 I-131 82.0

+/-

7.39 88.2 Pass 4/4/2022 ERA RAD129 Water Gamma pCi/L D4 Ba-133 56.6

+/-

4.24 62.9 Pass Cs-134 81.0

+/-

3.61 81.6 Pass Cs-137 37.8

+/-

4.54 36.6 Pass Co-60 97.6

+/-

5.11 97.4 Pass Zn-65 293

+/-

17.9 302 Pass 4/4/2022 ERA RAD129 Water Beta pCi/L S5E Cs-137 35.8

+/-

1.88 51.0 Fail1 4/4/2022 ERA RAD129 Water Gamma pCi/L D4 I-131 27.1

+/-

4.39 26.2 Pass 6/16/2022 ANA E13646 Water Beta pCi/L S5E Cs-137 250

+/-

4.66 260 Pass 6/16/2022 ANA E13647 Water Gamma pCi/L D3 Ce-141 141

+/-

15.5 139 Pass Co-58 126

+/-

14.9 128 Pass Co-60 244

+/-

12.6 242 Pass Cr-51 314

+/-

84.7 344 Pass Cs-134 163

+/-

9.09 172 Pass Cs-137 213

+/-

15.4 204 Pass Fe-59 170

+/-

19.0 157 Pass I-131 112

+/-

22.6 91.2 Pass Mn-54 243

+/-

16.9 229 Pass Zn-65 302

+/-

30.5 296 Pass

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 71 Sample Date Vendor Study ID Sample Type Units Equip ID Isotope Observed Reported Laboratory's Results Cross Check Lab Results NRC Resolution Test Pass / Fail 1 6/16/2022 ANA E13647 Water Gamma pCi/L D4 Ce-141 126

+/-

14.6 139 Pass Co-58 124

+/-

13.8 128 Pass Co-60 248

+/-

13.1 242 Pass Cr-51 358

+/-

92.9 344 Pass Cs-134 163

+/-

9.11 172 Pass Cs-137 217

+/-

15.8 204 Pass Fe-59 180

+/-

19.0 157 Pass I-131 86.2

+/-

24.2 91.2 Pass Mn-54 253

+/-

17.0 229 Pass Zn-65 253

+/-

30.2 296 Pass 6/16/2022 ANA E13648 Filter Gamma pCi D5 Ce-141 101

+/-

5.17 96.6 Pass Co-58 89.3

+/-

4.93 89.3 Pass Co-60 169

+/-

4.85 168 Pass Cr-51 252

+/-

34.6 239 Pass Cs-134 100

+/-

2.67 119 Pass Cs-137 142

+/-

5.25 142 Pass Fe-59 129

+/-

8.07 109 Pass Mn-54 168

+/-

5.97 159 Pass Zn-65 211

+/-

11.7 206 Pass

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 72 Sample Date Vendor Study ID Sample Type Units Equip ID Isotope Observed Reported Laboratory's Results Cross Check Lab Results NRC Resolution Test Pass / Fail 1 6/16/2022 ANA E13648 Filter Gamma pCi D4 Ce-141 96.7

+/-

7.64 97.0 Pass Co-58 89.2

+/-

7.09 89.0 Pass Co-60 171

+/-

7.27 168 Pass Cr-51 265

+/-

35.4 239 Pass Cs-134 104

+/-

4.09 119 Pass Cs-137 147

+/-

7.98 142 Pass Fe-59 136

+/-

10.6 109 Pass Mn-54 170

+/-

9.08 159 Pass Zn-65 198

+/-

16.4 206 Pass 6/16/2022 ANA E13649 Filter Beta pCi S5E Cs-137 276

+/-

3.47 242 Pass S5E Cs-137 276

+/-

3.47 242 Pass S5E Cs-137 275

+/-

3.47 242 Pass 9/15/2022 ANA E13650A Filter Beta pCi S5E Cs-137 242

+/-

3.25 224 Pass 9/19/2022 ERA MRAD037 Filter Gamma pCi D4 Cs-134 270

+/-

6.71 325 Pass Cs-137 706

+/-

19.3 795 Pass Co-60 198

+/-

8.36 191 Pass Zn-65 125

+/-

16.5 120 Pass 10/7/2022 ERA RAD131 Water Gamma pCi/L D4 Ba-133 75.0

+/-

3.79 79.4 Pass Cs-134 29.0

+/-

2.09 30.5 Pass Cs-137 212

+/-

7.45 212 Pass Co-60 50.4

+/-

3.06 51.4 Pass Zn-65 212

+/-

12.8 216 Pass 10/7/2022 ERA RAD131 Water Gamma pCi/L D3 I-131 25.4

+/-

6.03 24.4 Pass

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 73 Sample Date Vendor Study ID Sample Type Units Equip ID Isotope Observed Reported Laboratory's Results Cross Check Lab Results NRC Resolution Test Pass / Fail 1 12/1/2022 ANA E13651 Filter Gamma pCi D4 Ce-141 144

+/-

9.4 140 Pass Co-58 143

+/-

12.0 144 Pass Co-60 174

+/-

10.0 181 Pass Cr-51 287

+/-

54.4 290 Pass Cs-134 93.0

+/-

5.59 120 Pass Cs-137 134

+/-

10.7 137 Pass Fe-59 142

+/-

15.9 124 Pass Mn-54 162

+/-

12.1 158 Pass Zn-65 192

+/-

23.5 191 Pass 12/1/2022 ANA E13651 Filter Gamma pCi D5 Ce-141 146

+/-

8.6 140 Pass Co-58 140

+/-

10.1 144 Pass Co-60 180

+/-

8.97 181 Pass Cr-51 286

+/-

46.1 290 Pass Cs-134 94.5

+/-

48.6 120 Pass Cs-137 125

+/-

91.6 137 Pass Fe-59 148

+/-

12.8 124 Pass Mn-54 172

+/-

10.4 158 Pass Zn-65 199

+/-

20.3 191 Pass 12/1/2022 ANA E13652 Water Beta pCi/L S5E Cs-137 308

+/-

5.11 283 Pass 12/1/2022 ANA E13653 Cartridge Gamma pCi D2 I-131 88.7

+/-

9.50 91.6 Pass D3 I-131 88.5

+/-

9.40 91.6 Pass D4 I-131 93.5

+/-

8.60 91.6 Pass

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 74 Sample Date Vendor Study ID Sample Type Units Equip ID Isotope Observed Reported Laboratory's Results Cross Check Lab Results NRC Resolution Test Pass / Fail 1 12/1/2022 ANA E13653 Cartridge Gamma pCi D5 I-131 89.8

+/-

9.10 91.6 Pass 12/1/2022 ANA E13654 Milk Gamma pCi/L D4 Ce-141 223

+/-

19.5 225 Pass Co-58 222

+/-

19.7 230 Pass Co-60 281

+/-

16.3 290 Pass Cr-51 433

+/-

111 464 Pass Cs-134 182

+/-

114 191 Pass Cs-137 214

+/-

18.6 219 Pass Fe-59 220

+/-

23.3 198 Pass I-131 104

+/-

22.1 95.1 Pass Mn-54 252

+/-

19.7 252 Pass Zn-65 274

+/-

38.0 305 Pass 12/1/2022 ANA E13654 Milk Gamma pCi/L D5 Ce-141 228

+/-

19.1 225 Pass Co-58 226

+/-

17.7 230 Pass Co-60 285

+/-

14.9 290 Pass Cr-51 494

+/-

110 464 Pass Cs-134 179

+/-

10.1 191 Pass Cs-137 231

+/-

18.0 219 Pass Fe-59 214

+/-

21.6 198 Pass I-131 102

+/-

23.0 95.1 Pass Mn-54 252

+/-

18.6 252 Pass Zn-65 282

+/-

33.4 305 Pass 1 See discussion at the beginning of the Appendix

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 75 Table C-2 Results of Quality Assurance Program Sample Type and Location Sample Date Type of Analysis Result Units Original Analysis Replicate Analysis Split Analysis Pass/Fail (Replicate)

Pass/Fail (Split)

Water -

Circ in 1/3/2022 Gross Beta pCi/L 2.03

+/-

0.8 2.95

+/-

0.8 Pass NA Water -

Circ Out 1/3/2022 Gross Beta pCi/L 2.53

+/-

0.8 2.94

+/-

0.8 Pass NA Water -

OWD 1/3/2022 Gross Beta pCi/L 2.11

+/-

0.8 2.86

+/-

0.8 Pass NA Water -

MCWA 1/3/2022 Gross Beta pCi/L 1.64

+/-

0.8 2.11

+/-

0.8 Pass NA Water -

Webster 1/3/2022 Gross Beta pCi/L 1.33

+/-

0.7 1.75

+/-

0.7 Pass NA Water -

DC 1/12/2022 Gross Beta pCi/L 2.61

+/-

1.9 4.48

+/-

1.9 Pass NA Water -

ML 1/12/2022 Gross Beta pCi/L 4.74

+/-

4.1 4.96

+/-

4.1 Pass NA Water -

Circ in 10/10/2022 Gross Beta pCi/L 2.64

+/-

0.8 3.48

+/-

0.8 Pass NA Water -

Circ Out 10/10/2022 Gross Beta pCi/L 2.07

+/-

0.8 2.41

+/-

0.8 Pass NA Water -

OWD 10/10/2022 Gross Beta pCi/L 1.88

+/-

0.7 2.61

+/-

0.8 Pass NA Water -

MCWA 10/10/2022 Gross Beta pCi/L 1.82

+/-

0.7 1.74

+/-

0.7 Pass NA Water -

Webster 10/10/2022 Gross Beta pCi/L 2.23

+/-

0.8 2.36

+/-

0.8 Pass NA Water -

DC 10/31/2022 Gross Beta pCi/L 5.35

+/-

2.0 8.89

+/-

2.3 Pass NA Water -

ML 10/31/2022 Gross Beta pCi/L 8.19

+/-

2.2 8.58

+/-

2.2 Pass NA Water -

16C2 1/31/2022 Gross Beta pCi/L 2.6

+/-

0.8 NA

<2.5 NA Pass Water -

16C2 1/31/2022 LLI pCi/L

<MDA NA

<MDA NA Pass Water -

16C2 1/31/2022 Gamma pCi/L

<MDA NA

<MDA NA Pass Water -

16C2 2/28/2022 Gross Beta pCi/L 2.7

+/-

0.9 NA

<3.3 NA Pass Water -

16C2 2/28/2022 LLI pCi/L

<MDA NA

<MDA NA Pass Water -

16C2 2/28/2022 Gamma pCi/L

<MDA NA

<MDA NA Pass

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 76 Water -

16C2 3/29/2022 Gross Beta pCi/L 2.1

+/-

0.8 NA 3.24

+/-

1.7 NA Pass Water -

16C2 3/29/2022 LLI pCi/L

<MDA NA

<MDA NA Pass Water -

16C2 3/29/2022 Gamma pCi/L

<MDA NA

<MDA NA Pass Water -

16C2 3/29/2022 Tritium pCi/L

<123 NA

<194 NA Pass Water -

16C2 5/2/2022 Gross Beta pCi/L 1.6

+/-

0.8 NA

<2.8 NA Pass Water -

16C2 5/2/2022 LLI pCi/L

<MDA NA

<MDA NA Pass Water -

16C2 5/2/2022 Gamma pCi/L

<MDA NA

<MDA NA Pass Water -

16C2 5/31/2022 Gross Beta pCi/L 1.8

+/-

0.8 NA

<3.3 NA Pass Water -

16C2 5/31/2022 LLI pCi/L

<MDA NA

<MDA NA Pass Water -

16C2 5/31/2022 Gamma pCi/L

<MDA NA

<MDA NA Pass Water -

16C2 6/27/2022 Gross Beta pCi/L 5.1

+/-

1.0 NA

<3.0 NA Pass Water -

16C2 6/27/2022 LLI pCi/L

<MDA NA

<MDA NA Pass Water -

16C2 6/27/2022 Gamma pCi/L

<MDA NA

<MDA NA Pass Water -

16C2 6/27/2022 Tritium pCi/L

<164 NA

<182 NA Pass Water -

16C2 8/2/2022 Gross Beta pCi/L 2.7

+/-

1.6 NA

<1.8 NA Pass Water -

16C2 8/2/2022 LLI pCi/L

<MDA NA

<MDA NA Pass Water -

16C2 8/2/2022 Gamma pCi/L

<MDA NA

<MDA NA Pass Water -

16C2 8/29/2022 Gross Beta pCi/L 3.4

+/-

0.7 NA

<3.1 NA Pass Water -

16C2 8/29/2022 LLI pCi/L

<MDA NA

<MDA NA Pass Water -

16C2 8/29/2022 Gamma pCi/L

<MDA NA

<MDA NA Pass Water -

16C2 10/3/2022 Gross Beta pCi/L 1.8

+/-

0.8 NA

<3.1 NA Pass Water -

16C2 10/3/2022 LLI pCi/L

<MDA NA

<MDA NA Pass Water -

16C2 10/3/2022 Gamma pCi/L

<MDA NA

<MDA NA Pass Water -

16C2 10/3/2022 Tritium pCi/L

<163 NA

<188 NA Pass

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 77 Water -

16C2 10/31/2022 Gross Beta pCi/L 2.0

+/-

0.8 NA 3.22

+/-

1.8 NA Pass Water -

16C2 10/31/2022 LLI pCi/L

<MDA NA

<MDA NA Pass Water -

16C2 10/31/2022 Gamma pCi/L

<MDA NA

<MDA NA Pass Water -

16C2 11/29/2022 Gross Beta pCi/L 1.8

+/-

0.8 NA

<2.7 NA Pass Water -

16C2 11/29/2022 LLI pCi/L

<MDA NA

<MDA NA Pass Water -

16C2 11/29/2022 Gamma pCi/L

<MDA NA

<MDA NA Pass Water -

16C2 1/3/2023 Gross Beta pCi/L 2.4

+/-

0.8 NA

<3.0 NA Pass Water -

16C2 1/3/2023 LLI pCi/L

<MDA NA

<MDA NA Pass Water -

16C2 1/3/2023 Gamma pCi/L

<MDA NA

<MDA NA Pass Water -

16C2 1/3/2023 Tritium pCi/L

<156 NA

<178 NA Pass Milk-19B1 1/18/2022 LLI pCi/L

<MDA NA

<MDA NA Pass Milk-19B1 1/18/2022 Gamma pCi/L

<MDA NA

<MDA NA Pass Milk-25C1 1/18/2022 LLI pCi/L

<MDA NA

<MDA NA Pass Milk-25C1 1/18/2022 Gamma pCi/L

<MDA NA

<MDA NA Pass Milk-19B1 4/11/2022 LLI pCi/L

<MDA NA

<MDA NA Pass Milk-19B1 4/11/2022 Gamma pCi/L

<MDA NA

<MDA NA Pass Milk-25C1 4/11/2022 LLI pCi/L

<MDA NA

<MDA NA Pass Milk-25C1 4/11/2022 Gamma pCi/L

<MDA NA

<MDA NA Pass Milk-19B1 7/5/2022 LLI pCi/L

<MDA NA

<MDA NA Pass Milk-19B1 7/5/2022 Gamma pCi/L

<MDA NA

<MDA NA Pass Milk-19B1 10/11/2022 LLI pCi/L

<MDA NA

<MDA NA Pass Milk-19B1 10/11/2022 Gamma pCi/L

<MDA NA

<MDA NA Pass Milk-22B1 12/6/2022 LLI pCi/L

<MDA NA

<MDA NA Pass Milk-22B1 12/6/2022 Gamma pCi/L

<MDA NA

<MDA NA Pass

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 78 Composite-11S1 3/29/2022 Gamma pCi/m3 11S1

<MDA NA 11S2

<MDA NA Pass Composite-11S1 6/27/2022 Gamma pCi/m3 11S1

<MDA NA 11S2

<MDA NA Pass Composite-11S1 10/3/2022 Gamma pCi/m3 11S1

<MDA NA 11S2

<MDA NA Pass Composite-11S1 1/3/2023 Gamma pCi/m3 11S1

<MDA NA 11S2

<MDA NA Pass Air Filter -

A1 1/10/2022 Gross Beta 10-2 pCi/m3 2.7

+/-

0.2 2.8

+/-

0.2 Pass NA Air Filter -

A1 4/18/2022 Gross Beta 10-2 pCi/m3 1.6

+/-

0.1 1.6

+/-

0.1 Pass NA Air Filter -

A1 4/25/2022 Gross Beta 10-2 pCi/m3 1.8

+/-

0.1 1.8

+/-

0.1 Pass NA Air Filter -

A1 5/2/2022 Gross Beta 10-2 pCi/m3 2.4

+/-

0.1 2.3

+/-

0.1 Pass NA Air Filter -

A1 6/6/2022 Gross Beta 10-2 pCi/m3 2.3

+/-

0.1 2.2

+/-

0.1 Pass NA Air Filter -

A1 8/29/2022 Gross Beta 10-2 pCi/m3 3.4

+/-

0.1 3.3

+/-

0.2 Pass NA Air Filter -

A1 10/31/2022 Gross Beta 10-2 pCi/m3 1.1

+/-

0.1 1.3

+/-

0.1 Pass NA Air Filter -

A1 11/15/2022 Gross Beta 10-2 pCi/m3 1.5

+/-

0.1 1.6

+/-

0.1 Pass NA Air Filter -

A2 1/10/2022 Gross Beta 10-2 pCi/m3 2.4

+/-

0.2 2.4

+/-

0.2 Pass NA Air Filter -

A2 4/18/2022 Gross Beta 10-2 pCi/m3 1.4

+/-

0.1 1.3

+/-

0.1 Pass NA Air Filter -

A2 4/25/2022 Gross Beta 10-2 pCi/m3 1.6

+/-

0.1 1.6

+/-

0.1 Pass NA Air Filter -

A2 5/2/2022 Gross Beta 10-2 pCi/m3 2.2

+/-

0.2 2.0

+/-

0.1 Pass NA Air Filter -

A2 6/6/2022 Gross Beta 10-2 pCi/m3 1.7

+/-

0.1 1.7

+/-

0.1 Pass NA Air Filter -

A2 8/29/2022 Gross Beta 10-2 pCi/m3 3.0

+/-

0.1 3.0

+/-

0.2 Pass NA Air Filter -

A2 10/31/2022 Gross Beta 10-2 pCi/m3 1.1

+/-

0.1 1.2

+/-

0.1 Pass NA Air Filter -

A2 11/15/2022 Gross Beta 10-2 pCi/m3 1.5

+/-

0.1 1.6

+/-

0.1 Pass NA Air Filter -

A3 1/10/2022 Gross Beta 10-2 pCi/m3 3.1

+/-

0.2 2.9

+/-

0.2 Pass NA Air Filter -

A3 4/18/2022 Gross Beta 10-2 pCi/m3 1.5

+/-

0.1 1.5

+/-

0.1 Pass NA Air Filter -

A3 4/25/2022 Gross Beta 10-2 pCi/m3 1.8

+/-

0.1 1.8

+/-

0.1 Pass NA Air Filter -

A3 5/2/2022 Gross Beta 10-2 pCi/m3 2.6

+/-

0.1 2.1

+/-

0.1 Pass NA Air Filter -

A3 6/6/2022 Gross Beta 10-2 pCi/m3 2.3

+/-

0.1 2.3

+/-

0.2 Pass NA Air Filter -

A3 8/29/2022 Gross Beta 10-2 pCi/m3 3.6

+/-

0.1 3.5

+/-

0.2 Pass NA

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 79 Air Filter -

A3 10/31/2022 Gross Beta 10-2 pCi/m3 1.0

+/-

0.1 1.0

+/-

0.1 Pass NA Air Filter -

A3 11/15/2022 Gross Beta 10-2 pCi/m3 1.5

+/-

0.1 1.6

+/-

0.1 Pass NA Air Filter -

A4 1/10/2022 Gross Beta 10-2 pCi/m3 2.7

+/-

0.2 2.9

+/-

0.2 Pass NA Air Filter -

A4 4/18/2022 Gross Beta 10-2 pCi/m3 1.5

+/-

0.1 1.5

+/-

0.1 Pass NA Air Filter -

A4 4/25/2022 Gross Beta 10-2 pCi/m3 1.8

+/-

0.1 1.9

+/-

0.1 Pass NA Air Filter -

A4 5/2/2022 Gross Beta 10-2 pCi/m3 2.4

+/-

0.1 2.2

+/-

0.1 Pass NA Air Filter -

A4 6/6/2022 Gross Beta 10-2 pCi/m3 2.3

+/-

0.1 2.3

+/-

0.1 Pass NA Air Filter -

A4 8/29/2022 Gross Beta 10-2 pCi/m3 3.6

+/-

0.1 3.8

+/-

0.2 Pass NA Air Filter -

A4 10/31/2022 Gross Beta 10-2 pCi/m3 1.2

+/-

0.1 1.3

+/-

0.1 Pass NA Air Filter -

A4 11/15/2022 Gross Beta 10-2 pCi/m3 1.6

+/-

0.1 1.8

+/-

0.1 Pass NA Air Filter -

A5 1/10/2022 Gross Beta 10-2 pCi/m3 2.8

+/-

0.2 2.8

+/-

0.2 Pass NA Air Filter -

A5 4/18/2022 Gross Beta 10-2 pCi/m3 1.4

+/-

0.1 1.4

+/-

0.1 Pass NA Air Filter -

A5 4/25/2022 Gross Beta 10-2 pCi/m3 1.7

+/-

0.1 1.8

+/-

0.1 Pass NA Air Filter -

A5 5/2/2022 Gross Beta 10-2 pCi/m3 2.6

+/-

0.2 2.2

+/-

0.1 Pass NA Air Filter -

A5 6/6/2022 Gross Beta 10-2 pCi/m3 2.2

+/-

0.1 2.3

+/-

0.2 Pass NA Air Filter -

A5 8/29/2022 Gross Beta 10-2 pCi/m3 3.9

+/-

0.1 3.9

+/-

0.2 Pass NA Air Filter -

A5 10/31/2022 Gross Beta 10-2 pCi/m3 1.2

+/-

0.1 1.3

+/-

0.1 Pass NA Air Filter -

A5 11/15/2022 Gross Beta 10-2 pCi/m3 1.7

+/-

0.1 1.8

+/-

0.1 Pass NA Air Filter -

SFA1 1/10/2022 Gross Beta 10-2 pCi/m3 3.1

+/-

0.2 3.0

+/-

0.2 Pass NA Air Filter -

SFA1 4/18/2022 Gross Beta 10-2 pCi/m3 1.4

+/-

0.1 1.5

+/-

0.1 Pass NA Air Filter -

SFA1 4/25/2022 Gross Beta 10-2 pCi/m3 1.6

+/-

0.1 1.7

+/-

0.1 Pass NA Air Filter -

SFA1 5/2/2022 Gross Beta 10-2 pCi/m3 2.2

+/-

0.1 2.2

+/-

0.1 Pass NA Air Filter -

SFA1 6/6/2022 Gross Beta 10-2 pCi/m3 2.2

+/-

0.1 2.0

+/-

0.2 Pass NA Air Filter -

SFA1 8/29/2022 Gross Beta 10-2 pCi/m3 3.2

+/-

0.1 3.2

+/-

0.2 Pass NA Air Filter -

SFA1 10/31/2022 Gross Beta 10-2 pCi/m3 1.0

+/-

0.1 1.1

+/-

0.1 Pass NA

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 80 Air Filter -

SFA1 11/15/2022 Gross Beta 10-2 pCi/m3 1.5

+/-

0.1 1.6

+/-

0.1 Pass NA Air Filter -

SFA2 1/10/2022 Gross Beta 10-2 pCi/m3 2.7

+/-

0.2 2.8

+/-

0.2 Pass NA Air Filter -

SFA2 4/18/2022 Gross Beta 10-2 pCi/m3 1.6

+/-

0.1 1.6

+/-

0.1 Pass NA Air Filter -

SFA2 4/25/2022 Gross Beta 10-2 pCi/m3 1.8

+/-

0.1 1.8

+/-

0.1 Pass NA Air Filter -

SFA2 5/2/2022 Gross Beta 10-2 pCi/m3 2.2

+/-

0.1 2.4

+/-

0.1 Pass NA Air Filter -

SFA2 6/6/2022 Gross Beta 10-2 pCi/m3 2.4

+/-

0.1 2.4

+/-

0.1 Pass NA Air Filter -

SFA2 8/29/2022 Gross Beta 10-2 pCi/m3 3.3

+/-

0.1 3.4

+/-

0.2 Pass NA Air Filter -

SFA2 10/31/2022 Gross Beta 10-2 pCi/m3 1.0

+/-

0.1 1.0

+/-

0.1 Pass NA Air Filter -

SFA2 11/15/2022 Gross Beta 10-2 pCi/m3 1.5

+/-

0.1 1.6

+/-

0.1 Pass NA Air Filter -

SFA3 1/10/2022 Gross Beta 10-2 pCi/m3 2.9

+/-

0.2 3.0

+/-

0.2 Pass NA Air Filter -

SFA3 4/18/2022 Gross Beta 10-2 pCi/m3 1.5

+/-

0.1 1.4

+/-

0.1 Pass NA Air Filter -

SFA3 4/25/2022 Gross Beta 10-2 pCi/m3 1.6

+/-

0.1 1.7

+/-

0.1 Pass NA Air Filter -

SFA3 5/2/2022 Gross Beta 10-2 pCi/m3 2.3

+/-

0.1 2.1

+/-

0.1 Pass NA Air Filter -

SFA3 6/6/2022 Gross Beta 10-2 pCi/m3 2.4

+/-

0.1 2.2

+/-

0.2 Pass NA Air Filter -

SFA3 8/29/2022 Gross Beta 10-2 pCi/m3 3.5

+/-

0.1 3.3

+/-

0.2 Pass NA Air Filter -

SFA3 10/31/2022 Gross Beta 10-2 pCi/m3 0.9

+/-

0.1 1.1

+/-

0.1 Pass NA Air Filter -

SFA3 11/15/2022 Gross Beta 10-2 pCi/m3 1.2

+/-

0.1 1.5

+/-

0.1 Pass NA Air Filter -

SFA4 1/10/2022 Gross Beta 10-2 pCi/m3 2.7

+/-

0.2 2.8

+/-

0.2 Pass NA Air Filter -

SFA4 4/18/2022 Gross Beta 10-2 pCi/m3 1.4

+/-

0.1 1.4

+/-

0.1 Pass NA Air Filter -

SFA4 4/25/2022 Gross Beta 10-2 pCi/m3 1.7

+/-

0.1 1.7

+/-

0.1 Pass NA Air Filter -

SFA4 5/2/2022 Gross Beta 10-2 pCi/m3 2.2

+/-

0.1 2.0

+/-

0.1 Pass NA Air Filter -

SFA4 6/6/2022 Gross Beta 10-2 pCi/m3 2.0

+/-

0.1 2.1

+/-

0.1 Pass NA Air Filter -

SFA4 10/31/2022 Gross Beta 10-2 pCi/m3 0.9

+/-

0.1 1.1

+/-

0.1 Pass NA Air Filter -

SFA4 11/15/2022 Gross Beta 10-2 pCi/m3 1.3

+/-

0.1 1.5

+/-

0.1 Pass NA

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 81 Air Filter -

STATION-02 4/18/2022 Gross Beta 10-2 pCi/m3 3.0

+/-

0.1 3.1

+/-

0.1 Pass NA Air Filter -

STATION-03 4/18/2022 Gross Beta 10-2 pCi/m3 3.0

+/-

0.2 3.1

+/-

0.1 Pass NA Air Filter -

STATION-04 4/18/2022 Gross Beta 10-2 pCi/m3 3.4

+/-

0.3 3.2

+/-

0.3 Pass NA Air Filter -

STATION-05 4/18/2022 Gross Beta 10-2 pCi/m3 3.4

+/-

0.2 3.4

+/-

0.2 Pass NA Air Filter -

STATION-06 4/18/2022 Gross Beta 10-2 pCi/m3 3.3

+/-

0.2 3.4

+/-

0.2 Pass NA Air Filter -

STATION-07 4/18/2022 Gross Beta 10-2 pCi/m3 3.6

+/-

0.2 3.6

+/-

0.2 Pass NA Air Filter -

STATION-08 4/19/2022 Gross Beta 10-2 pCi/m3 3.0

+/-

0.2 3.3

+/-

0.2 Pass NA Air Filter -

STATION-09 4/19/2022 Gross Beta 10-2 pCi/m3 3.4

+/-

0.2 3.2

+/-

0.2 Pass NA Air Filter -

STATION-10 4/19/2022 Gross Beta 10-2 pCi/m3 3.5

+/-

0.2 3.5

+/-

0.2 Pass NA Air Filter -

STATION-11 4/19/2022 Gross Beta 10-2 pCi/m3 3.4

+/-

0.2 3.2

+/-

0.2 Pass NA Air Filter -

STATION-12 4/19/2022 Gross Beta 10-2 pCi/m3 3.3

+/-

0.2 3.4

+/-

0.2 Pass NA Air Filter -

STATION-13 4/19/2022 Gross Beta 10-2 pCi/m3 3.4

+/-

0.2 3.4

+/-

0.2 Pass NA Air Iodine -

A1 1/18/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

A2 1/18/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

A3 1/18/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

A4 1/18/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

A5 1/18/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

SFA1 1/18/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

SFA2 1/18/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

SFA3 1/18/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

SFA4 1/18/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

A1 2/15/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

A2 2/15/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

A3 2/15/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

A4 2/15/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

A5 2/15/2022 I-131 pCi/m3

<MDA

<MDA Pass NA

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 82 Air Iodine -

SFA1 2/15/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

SFA2 2/15/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

SFA3 2/15/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

SFA4 2/15/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

A1 5/9/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

A2 5/9/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

A3 5/9/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

A4 5/9/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

A5 5/9/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

SFA1 5/9/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

SFA2 5/9/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

SFA3 5/9/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

SFA4 5/9/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

A1 8/1/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

A2 8/1/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

A3 8/1/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

A4 8/1/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

A5 8/1/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

SFA1 8/1/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

SFA2 8/1/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

SFA3 8/1/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

SFA4 8/1/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

A1 9/6/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

A2 9/6/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

A3 9/6/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

A4 9/6/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

A5 9/6/2022 I-131 pCi/m3

<MDA

<MDA Pass NA

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 83 Air Iodine -

SFA1 9/6/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

SFA2 9/6/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

SFA3 9/6/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

SFA4 9/6/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine STATION-02 10/4/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine STATION-04 10/4/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine STATION-07 10/4/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine STATION-08 10/4/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine STATION-09 10/4/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine STATION-11 10/4/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

A1 10/24/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

A2 10/24/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

A3 10/24/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

A4 10/24/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

A5 10/24/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

SFA1 10/24/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

SFA2 10/24/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

SFA3 10/24/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

SFA4 10/24/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

A1 12/19/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

A2 12/19/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

A3 12/19/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

A4 12/19/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

A5 12/19/2022 I-131 pCi/m3

<MDA

<MDA Pass NA

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 84 Air Iodine -

SFA1 12/19/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

SFA2 12/19/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

SFA3 12/19/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

SFA4 12/19/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

STATION-02 12/19/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

STATION-04 12/19/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

STATION-07 12/19/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

STATION-08 12/19/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

STATION-09 12/19/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

STATION-11 12/19/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

A1 12/27/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

A2 12/27/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

A3 12/27/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

A4 12/27/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

A5 12/27/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

SFA1 12/27/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

SFA2 12/27/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

SFA3 12/27/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Air Iodine -

SFA4 12/27/2022 I-131 pCi/m3

<MDA

<MDA Pass NA Soil-SFS31 2/21/2022 Gamma pCi/kg 146

+/- 61.9 212

+/-

67.5 141

+/-

83.0 Pass Pass Soil-SFS3 6/6/2022 Gamma pCi/kg

<MDA

<MDA NA Pass NA Soil-SFS5 6/6/2022 Gamma pCi/kg

<MDA

<MDA NA Pass NA Sediment-WBS2 6/21/2022 Gamma pCi/kg

<MDA

<MDA Pass Pass Air Filter -

A1 6/27/2022 Gamma pCi/m3

<MDA

<MDA Pass Pass Air Filter -

A2 6/27/2022 Gamma pCi/m3

<MDA

<MDA Pass Pass

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 85 Air Filter -

A3 6/27/2022 Gamma pCi/m3

<MDA

<MDA Pass Pass Air Filter -

A4 6/27/2022 Gamma pCi/m3

<MDA

<MDA Pass Pass Air Filter -

A5 6/27/2022 Gamma pCi/m3

<MDA

<MDA Pass Pass Air Filter -

SFA1 6/27/2022 Gamma pCi/m3

<MDA

<MDA Pass Pass Air Filter -

SFA2 6/27/2022 Gamma pCi/m3

<MDA

<MDA Pass Pass Air Filter -

SFA3 6/27/2022 Gamma pCi/m3

<MDA

<MDA Pass Pass Air Filter -

SFA4 6/27/2022 Gamma pCi/m3

<MDA

<MDA Pass Pass Cabbage-IB8 6/27/2022 Gamma pCi/kg

<MDA

<MDA NA Pass NA Water-WA1 7/1/2022 Gamma pCi/L

<MDA

<MDA NA Pass NA Water-WA2 7/1/2022 Gamma pCi/L

<MDA

<MDA NA Pass NA Cabbage-IB4 7/25/2022 Gamma pCi/kg

<MDA

<MDA Pass Pass Tomato-EAST 7/28/2022 Gamma pCi/kg

<MDA

<MDA NA Pass NA Zucchini-SSE 7/28/2022 Gamma pCi/kg

<MDA

<MDA NA Pass NA Zucchini-EAST 7/28/2022 Gamma pCi/kg

<MDA

<MDA NA Pass NA Water-WA1 7/29/2022 Gamma pCi/L

<MDA

<MDA Pass Pass Water-WA2 7/29/2022 Gamma pCi/L

<MDA

<MDA Pass Pass Fish-IA1 8/24/2022 Gamma pCi/kg

<MDA

<MDA NA Pass NA Oysters-IA3 8/24/2022 Gamma pCi/kg

<MDA

<MDA NA Pass NA Collards-IB4 9/19/2022 Gamma pCi/kg

<MDA

<MDA NA Pass NA Kale-IB5 9/19/2022 Gamma pCi/kg

<MDA

<MDA NA Pass NA Water-WA1 9/30/2022 Gamma pCi/L

<MDA

<MDA NA Pass NA Water-WA2 9/30/2022 Gamma pCi/L

<MDA

<MDA NA Pass NA

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 86 Sediment-WB1 10/3/2022 Gamma pCi/kg

<MDA

<MDA Pass Pass Milk-Farm A 10/5/2022 Gamma pCi/L

<MDA

<MDA NA Pass NA Milk-Farm B 10/3/2022 Gamma pCi/L

<MDA

<MDA NA Pass NA Oysters-IA3 10/11/2022 Gamma pCi/kg

<MDA

<MDA Pass Pass Oysters-IA6 10/11/2022 Gamma pCi/kg

<MDA

<MDA Pass Pass Vegetation SFB1 11/15/2022 Gamma pCi/kg

<MDA

<MDA Pass Pass Vegetation SFB5 11/15/2022 Gamma pCi/kg

<MDA

<MDA Pass Pass Fish-NORTH 11/15/2022 Gamma pCi/kg

<MDA

<MDA Pass Pass Fish-WEST 11/15/2022 Gamma pCi/kg

<MDA

<MDA Pass Pass Soil-SFS31 11/15/2022 Gamma pCi/kg 133

+/- 55.3 169

+/-

61.3 NA Pass NA Soil-SFS1 11/15/2022 Gamma pCi/kg

<MDA

<MDA NA Pass NA Soil-SFS2 11/15/2022 Gamma pCi/kg

<MDA

<MDA NA Pass NA Milk-18E1 11/22/2022 Gamma pCi/L

<MDA

<MDA NA Pass NA Milk-19B1 11/22/2022 Gamma pCi/L

<MDA

<MDA NA Pass NA Milk-G2-1Q 11/23/2022 Gamma pCi/L

<MDA

<MDA NA Pass NA Milk-Farm A 11/28/2022 Gamma pCi/L

<MDA

<MDA NA Pass NA Milk-Farm B 11/28/2022 Gamma pCi/L

<MDA

<MDA NA Pass NA Water-WA1 11/29/2022 Gamma pCi/L

<MDA

<MDA Pass Pass Water-WA2 11/29/2022 Gamma pCi/L

<MDA

<MDA Pass Pass Water-4L 11/30/2022 Gamma pCi/L

<MDA

<MDA Pass Pass

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 87 Water-Q9-1 11/30/2022 Gamma pCi/L

<MDA

<MDA NA Pass NA Milk-Farm J 12/6/2022 Gamma pCi/L

<MDA

<MDA NA Pass NA Milk-Farm S 12/6/2022 Gamma pCi/L

<MDA

<MDA NA Pass NA Milk-Farm V 12/7/2022 Gamma pCi/L

<MDA

<MDA NA Pass NA Milk-G2-1Q 12/7/2022 Gamma pCi/L

<MDA

<MDA NA Pass NA Water-4L 12/29/2022 Gamma pCi/L

<MDA

<MDA Pass Pass Water-WA1 12/29/2022 Gamma pCi/L

<MDA

<MDA NA Pass NA Water-WA2 12/29/2022 Gamma pCi/L

<MDA

<MDA NA Pass NA DR051 04/11/22 Ambient Radiation mrem 12.4 13.9 PASS DR061 04/11/22 Ambient Radiation mrem 10.0 10.2 PASS DR071 04/11/22 Ambient Radiation mrem 11.2 9.3 PASS DR081 04/11/22 Ambient Radiation mrem 14.9 16.2 PASS DR091 04/11/22 Ambient Radiation mrem 11.1 9.7 PASS DR101 04/11/22 Ambient Radiation mrem 10.3 11.2 PASS DR111 04/11/22 Ambient Radiation mrem 12.0 11.2 PASS SFDR141 04/11/22 Ambient Radiation mrem 81.9 78.0 PASS SFDR151 04/11/22 Ambient Radiation mrem 39.4 37.2 PASS DR231 04/11/22 Ambient Radiation mrem 17.2 16.5 PASS DR051 07/11/22 Ambient Radiation mrem 14.5 11.7 PASS DR061 07/11/22 Ambient Radiation mrem 9.49 10.8 PASS DR071 07/11/22 Ambient Radiation mrem 10.1 11.4 PASS DR081 07/11/22 Ambient Radiation mrem 16.9 15.5 PASS DR091 07/11/22 Ambient Radiation mrem 11.2 9.99 PASS DR101 07/11/22 Ambient Radiation mrem 11.2 10.5 PASS DR111 07/11/22 Ambient Radiation mrem 12.3 11.2 PASS

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 88 SFDR141 07/11/22 Ambient Radiation mrem 79.4 82.0 PASS SFDR151 07/11/22 Ambient Radiation mrem 37.0 39.7 PASS DR231 07/11/22 Ambient Radiation mrem 17.4 16.0 PASS DR051 10/11/22 Ambient Radiation mrem 11.7 13.0 PASS DR061 10/11/22 Ambient Radiation mrem 11.6 11.4 PASS DR071 10/11/22 Ambient Radiation mrem 11.3 11.4 PASS DR081 10/11/22 Ambient Radiation mrem 13.1 16.9 PASS DR091 10/11/22 Ambient Radiation mrem 11.3 11.4 PASS DR101 10/11/22 Ambient Radiation mrem 10.2 10.4 PASS DR111 10/11/22 Ambient Radiation mrem 13.2 11.9 PASS SFDR141 10/11/22 Ambient Radiation mrem 89.2 87.3 PASS SFDR151 10/11/22 Ambient Radiation mrem 43.5 37.0 PASS DR051 01/17/23 Ambient Radiation mrem 13.1 12.4 PASS DR061 01/17/23 Ambient Radiation mrem 10.3 12.1 PASS DR071 01/17/23 Ambient Radiation mrem 11.6 13.0 PASS DR081 01/17/23 Ambient Radiation mrem 13.2 13.7 PASS DR091 01/17/23 Ambient Radiation mrem 10.2 9.8 PASS DR101 01/17/23 Ambient Radiation mrem 10.2 12.6 PASS DR111 01/17/23 Ambient Radiation mrem 11.5 11.9 PASS SFDR141 01/17/23 Ambient Radiation mrem 78.2 87.0 PASS SFDR151 01/17/23 Ambient Radiation mrem 50.0 43.0 PASS DR231 01/17/23 Ambient Radiation mrem 13.1 12.4 PASS 1 See discussion at the beginning of the Appendix

- The nature of these samples precluded splitting them with an independent laboratory.

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 89 TABLE C-3 Calvert Cliffs Nuclear Power Plant ODCM Required LLDs Selected Water Fish/Shellfish Milk Sediment Vegetation Particulates1 Nuclides pCi/l pCi/kg pCi/L pCi/kg pCi/kg pCi/m3 H-3 2000 Mn-54 15 130 Co-58 15 130 Fe-59 30 260 Co-60 15 130 Zn-65 30 260 Zr-95/Nb-95 15 I-131 152 1

60 0.073 Cs-134 15 130 15 150 60 0.05 Cs-137 18 150 18 180 80 0.06 BaLa-140 15 15 1Gross Beta activity LLD = 0.01pCi/m3 2 In accordance with the ODCM no drinking water pathway exists so the Gamma Isotopic LLD is used.

3 Air samples for I-131 are collected separately on a charcoal radioiodine cannister

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 90 APPENDIX D Land Use Survey Appendix D contains the results of a Land Use Survey conducted around Calvert Cliffs Nuclear Power Plant during this operating period. A table listing the raw data of this survey and a discussion of the results are included in this appendix.

Discussion A Land Use Survey was conducted to identify, within a distance of 5 miles, the location of the nearest milk animal, the nearest residence, and the nearest garden greater than 50 m2 in each of the nine sectors over land. A detailed description of the Land Use Survey is given in a separate document (Ref. 9). The position of the nearest residence and garden in each sector out to 5 miles is given in the adjacent table. An

denotes a change in this sector since the 2021 Land Use Census.

The closest residence is situated in the SW sector and the nearest garden is in the West sector.

There are no animals producing milk for public consumption within the 5-mile radius. At a farm that spans the W to WNW Sectors, goats were identified as being used occasionally for meat consumption by the owners and not for milk or dairy. At this time there is no plan to sell these items to the public. The closest beef cattle for meat consumption are 3.0 miles in the South Sector.

Discussion with a local waterman indicate that oysters are still harvested in the vicinity of CCNPP.

Table D-1 Land Use Survey Distance from Plant (miles)

Sector Residence Garden SE 1.5 4.5 SSE 1.6 2.0*

S 1.6 1.9 SSW 1.5 1.6 SW 1.1 2.4 WSW 1.2 1.5 W

1.3 1.2 WNW 2.7 2.0 NW 2.0 2.1

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 91 APPENDIX E Additional Samples and Analysis Results Appendix E is a presentation of the analytical results for additional samples collected in the environs of CCNPP. These extra samples are not required by the ODCM (Ref. 6). Table E-1 lists the locations of all the additional samples and groundwater samples discussed below. The remaining tables in this appendix provide the results. Some of these samples were collected and analyzed to maintain the historical continuity for samples and sampling pathways discontinued when the Environmental Technical Specifications were changed in March,1985.

Table E-4 through E-5 contain analytical results for additional samples taken from aquatic and atmospheric radiological pathways surrounding the plant. There were no positive detects for any non-natural Gamma emitters The NEI Industry Groundwater Protection Initiative was established to determine the potential impact nuclear power plants may have on the surrounding environment due to unplanned releases of radioactive liquids. Under the Groundwater Protection Initiative, groundwater monitoring is accomplished through routine sampling of the water table around the plant (Ref.

16). Analysis is performed for gamma, tritium, alpha, beta, and various other radiological isotopes. Tables E-6 through E-12 contain the analytical results for samples taken from the various groundwater monitoring wells, subsurface drains, and rainwater.

In 2019 MH24 was renamed to MH66/SSD3.

Groundwater samples were collected from 16 of 17 on-site piezometer tubes and three subsurface manholes in 2021. These locations are listed in Table E-1 and on Figure E-1, Site Map Groundwater Monitoring Wells. Figure E-2, Site Map RW Locations, shows precipitation collection sites. A piezometer tube is a shallow monitoring well which allows access to groundwater at a depth of approximately 40 feet beneath the site. Of the piezometer tubes sampled, only #11 piezometer, MH28 and MH30 showed any results greater than MDAs. This activity was previously identified and evaluated in December of 2005. The activity consists of tritium originating from normal radiological waste discharges and was previously reported in the Annual Radioactive Release Reports. The tritium contamination is contained on site. No drinking water has been affected; the groundwater at this location does not impact any drinking water pathway.

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 92 TABLE OF CONTENTS - ANALYTICAL RESULTS Table Title Page E-1 Locations of Non-Tech Spec and Radiological Groundwater Environmental Sampling Stations for Calvert Cliffs Nuclear Power Plant................................................................93 E-2 Synopsis of 2022 Calvert Cliffs Nuclear Power Plant Non-Tech Spec Radiological Environmental Monitoring Program..................................................................................94 E-3 Annual Summary for Calvert Cliffs Nuclear Power Plant Units 1 & 2 Non-Tech Spec Radiological Environmental Monitoring Program............................................................95 E-4 Concentration of Gamma Emitters in Bottom Sediment...................................................96 E-5 Concentration of Iodine-131 in Filtered Air......................................................................97 E-6 Alpha Isotopic and Pu-241 in Groundwater......................................................................99 E-7 Gross Alpha Activity in Groundwater.............................................................................100 E-8 Concentration of Radiostrontium in Groundwater..........................................................101 E-9 Concentration of Tritium in Groundwater.......................................................................102 E-10 Concentration of Tritium in Surface Water, Precipitation, and Subsurface Drainage.....103 E-11 Gross Concentration of Gamma Emitters in Groundwater..............................................104 E-12 Gross Concentration of Gamma Emitters in Surface Water, Precipitation and MH.......105 Figure Title Page E-1 Site Map Groundwater Monitoring Wells.......................................................................106 E-2 Site Map Rainwater Locations.........................................................................................107

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 93 TABLE E-1 Locations of Non-Tech Spec and Radiological Groundwater Environmental Sampling Stations for Calvert Cliffs Nuclear Power Plant Non-Tech Spec Station Description Distance1 Direction1 (KM)

(Miles)

(Sector)

WBS2 Discharge Area 0.3 0.2 N

WBS4 Camp Conoy/Rocky Point 3.0 1.9 SE SFA2 Visitors Center 0.8 2 0.5 2 N 2 RGPP Station Description PZ11 45' - North side of Unit 1 near roll-up door PZ12 NW corner of Unit 1 PZ13 Unit 1 RWT PZ15 Unit 2 RWT PZ18 45' - South side near stairwell to waterfront (idle)

PZ19 10' - Southside near traveling screen trough PZ20 10' -Northside of MMD Shop PZ21 10' - In grass West of STP PZ22 10 - In grass West of STP PZ23 45 - S of SSB doors PZ24 45' - East of SSB near Unit 2 roll-up door PZ25 45' - South side near stairwell to waterfront PZ26 45' -SW of Spare Transformer PZ27 45' -SW of Spare Transformer PZ28 45 - SW corner of NRC Bldg PZ29 45' - East of Nitrogen Tank in road PZ30 45' -NE Corner of Turbine Bldg RW1 RW Met Tower RW2 Lower Lay Down Area RW3 RW4 Visitors Center Overlook RW4 Waterfront RW5 RW Open Grass Area outside NSF PA exit RW6 U2 Turbine Building roll up door RW7 Open area north of Outfall 004 RW8 Open area on north wing wall MH28 12'- Unit1 next to Feed Water Heater MH30 12'- Unit 2 next to elevator MH66/SSD3 45'- East of SSB and South of Turbine Bldg (formerly named MH-24)

SW003 Waterfront south of Sewage Treatment Plant SW004 Waterfront Barge Dock Rd 1 Distance and direction from the central point between the two containment buildings

2. Distance and direction from the central point of the ISFSI

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 94 Table E-2 Synopsis of 2022 Calvert Cliffs Nuclear Power Plant Non-Tech Spec Radiological Environmental Monitoring Program Sample Type Sampling Frequency1 Number of Locations Number Collected Analysis Analysis Frequency1 Number Analyzed Aquatic Environment Bottom Sediment SA 2

4 Gamma SA 4

Atmospheric Environment Air Iodine2 W

1 52 I-131 W

52 1 W=weekly, M=monthly, Q=quarterly, SA=semiannual, A=annual, C=composite 2 The collection device contains Charcoal

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 95 Table E-3 Annual Summary for Calvert Cliffs Nuclear Power Plant Units 1 & 2 Non-Tech Spec Radiological Environmental Monitoring Program Medium or Pathway Sampled (Unit of Measurement)

Type and Total Number of Analyses Performed Lower Limit of Detection (LLD)

Indicator Locations Mean (F)/Range1 Location with Highest Annual Mean Name/Distance &

Direction2 Highest Annual Mean (F) / Range1 Control Locations Mean (F)/Range There were No Positive Results in 2022 Non-Tech Spec samples of air and bottom sediment reported in Tables E-4 and E-5.

1 Mean and range based upon detectable measurements only. Fraction (F) of detectable measurements at specified location is indicated in parentheses.

2 Distance and direction from the central point between the two containment buildings.

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 96 Table E-4 Concentration of Gamma Emitters in Bottom Sediment (Results in units of pCi/kg (dry) +/- 2)

Sample Code Sample Date Gamma Emitters WBS2 Discharge Area 6/21/2022 10/11/2022 WBS41 Camp Conoy/ Rocky Point 6/21/2022 10/11/2022 1 Control Location

All Non-Natural Gamma Emitters <MDA

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 97 Table E-5 Concentration of Iodine-131 in Filtered Air (Results in units of 10-3 pCi/m3 +/- 2)

Start Date Stop Date SFA21 Visitors Center 1/4/2022 1/10/2022 1/10/2022 1/18/2022 1/18/2022 1/24/2022 1/24/2022 1/31/2022 1/31/2022 2/7/2022 2/7/2022 2/15/2022 2/15/2022 2/21/2022 2/21/2022 3/1/2022 3/1/2022 3/7/2022 3/7/2022 3/14/2022 3/14/2022 3/21/2022 3/21/2022 3/28/2022 3/28/2022 4/4/2022 4/4/2022 4/11/2022 4/11/2022 4/18/2022 4/18/2022 4/25/2022 4/25/2022 5/2/2022 5/2/2022 5/9/2022 5/9/2022 5/16/2022 5/16/2022 5/23/2022 5/23/2022 5/31/2022 5/31/2022 6/6/2022 6/6/2022 6/13/2022 6/13/2022 6/20/2022 6/20/2022 6/27/2022 6/27/2022 7/5/2022 7/5/2022 7/11/2022 7/11/2022 7/18/2022 7/18/2022 7/25/2022 7/25/2022 8/1/2022 8/1/2022 8/8/2022 8/8/2022 8/15/2022 8/15/2022 8/22/2022 8/22/2022 8/29/2022 8/29/2022 9/6/2022 9/6/2022 9/12/2022 9/12/2022 9/19/2022 9/19/2022 9/26/2022 9/26/2022 10/3/2022

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 98 Table E-5 Concentration of Iodine-131 in Filtered Air (Results in units of 10-3 pCi/m3 +/- 2)

Start Date Stop Date SFA21 Visitors Center 10/3/2022 10/10/2022 10/10/2022 10/17/2022 10/17/2022 10/24/2022 10/24/2022 10/31/2022 10/31/2022 11/7/2022 11/7/2022 11/15/2022 11/15/2022 11/21/2022 11/21/2022 11/28/2022 11/28/2022 12/5/2022 12/5/2022 12/12/2022 12/12/2022 12/19/2022 12/19/2022 12/27/2022 12/27/2022 1/3/2023 1 Control Location

<MDA

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 99 Table E-6 Alpha Isotopic and Pu-241 in Groundwater (Results in units of pCi/L +/- 2)

Station Sample Date AM-241 (AS)

CM-242 (AS)

CM-243/244 (AS)

PU-238 (AS)

PZ11 5/4/2022

<0.0718

<0.0382

<0.071

<0.1962 PZ24 10/19/22

<0.0335

<0.0553

<0.033

<0.0632 Station Sample Date U-233/234 (AS)

U-235 (AS)

U-238 (AS)

PU-239/240 (AS)

PZ11 5/4/2022

<0.0622

<0.0413

<0.0334

<0.0981 PZ24 10/19/22 0.934 +/- 0.295

<0.0301 0.5441 +/- 0.258

<0.1264 Station Sample Date Fe-55 Ni-63 PZ11 5/4/2022

<104.3

<4.99

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 100 Table E-7 Gross Alpha Activity in Groundwater (Results in units of pCi/L +/- 2)

Station Sample Date GR-A (DIS) (pCi/L)

GR-A (SUS) (pCi/L)

PZ11 5/4/2022

<0.766

<0.622 PZ12 5/4/2022

<2.66

<0.829 PZ13 5/4/2022

<0.885

<0.848 PZ15 5/4/2022

<1.25

<0.787 PZ24 5/3/2022

<1.31 1.87 +/- 0.95 10/19/2022

<1.76

<0.99 PZ25 5/3/2022

<1.27

<0.677 PZ29 5/3/2022

<1.34

<0.729 PZ30 5/3/2022 2.5 +/- 1.1

<0.676 MH66/SSD3*

12/02/2022

<1.17

<0.852 MH-28 10/11/2022

<0.584

<0.489 MH-30 10/13/2022

<0.560

<0.491

Renamed from MH-24

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 101 Table E-8 Concentration of Radiostrontium in Groundwater (Results in units of pCi/L +/- 2)

Station Sample Date SR-89 (pCi/L)

SR-90 (pCi/L)

MH66/SSD3*

4/8/2022

<8.34

<0.856 MH28 4/12/2022

<7.27

<0.816 MH30 4/12/2022

<8.82

<0.862 PZ11 5/04/2022

<6.68

<0.837 PZ12 5/04/2022

<5.55

<0.902 PZ13 5/04/2022

<5.46

<0.843 PZ15 5/04/2022

<5.67

<0.761 PZ24 5/03/2022

<7.84

<0.871 PZ25 5/03/2022

<6.20

<0.829 PZ29 5/03/2022

<6.50

<0.863 PZ30 5/03/2022

<6.37

<0.844

Renamed from MH-24

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 102 Table E-9 Concentration of Tritium in Groundwater (Results in units of pCi/L +/- 2)

By Piezometer Tube Locations SAMPLE DATE 11 12 13 15 19 20 21 22 23 24 25 26 27 28 29 30 03/08/2022 186 +/- 115

<180

<169

<192 ND ND ND ND ND

<194

<199 ND ND ND

<189

<199 05/03/2022 ND ND ND ND

<200

<179

<186 ND

<188

<189 ND ND ND

<188

<199 05/04/2022

<185

<180

<183

<200 ND ND ND ND

<182 ND ND

<193

<186

<177 ND ND 08/09/2022

<186

<187

<188

<184 ND ND ND ND ND

<175

<176 ND ND ND

<194

<199 10/19/2022 ND

<174

<190

<173 ND ND ND ND ND

<196

<189 ND ND ND

<197

<194 ND No Data - Sample obtained as required

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 103 Table E-10 Concentration of Tritium in Surface Water, Precipitation, and Subsurface Drainage (Results in units of pCi/L +/- 2)

SAMPLE DATE

MH-66

/SSD3 MH28 MH30 SW003 SW004 RW1 RW2 RW3 RW4 RW5 RW6 RW7 RW8 01/11/2022 ND 2560 +/- 319 1870 +/- 256 ND ND ND ND ND ND ND ND ND ND 01/18/2022

<184 ND ND ND ND ND ND ND ND ND ND ND ND 01/19/2022 ND ND ND ND ND

<175

<179

<177

<175

<172

<191

<179 04/04/2022 ND ND ND ND ND

<177

<174

<189

<169

<167

<184

<195

<186 4/8/2022

<187 ND ND ND ND ND ND ND ND ND ND ND ND 4/12/2022 ND 644 +/- 148 1580 +/- 224 ND ND ND ND ND ND ND ND ND ND 07/01/2022 ND ND ND ND ND

<180

<168

<171

<194

<176

<180

<191

<190 7/8/2022

<195 ND ND ND ND ND ND ND ND ND ND ND ND 7/13/2022 ND 1440 +/- 219 1700 +/- 247 ND ND ND ND ND ND ND ND ND ND 9/28/2022 ND ND ND ND ND

<179

<171

<178

<194

<187

<193

<182

<200 10/11/2022 ND 1770 +/- 265 ND ND ND ND ND ND ND ND ND ND ND 10/13/2022 ND ND 1510 +/- 241 ND ND ND ND ND ND ND ND ND ND 12/02/2022

<180 ND ND ND ND ND ND ND ND ND ND ND ND 12/13/2022 ND ND ND ND ND

<183

<185

<177

<173

<183

<180

<178

<191

MH24 Renamed MH-66/SSD3 ND No Data - sample obtained as required

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 104 Table E-11 Gross Concentration of Gamma Emitters in Groundwater (Results in units of pCi/L +/- 2)

By Piezometer Tube Locations SAMPLE DATE 11 12 13 15 19 20 21 22 23 24 25 26 27 28 29 30 5/3/2022 ND ND ND ND ND ND ND ND 5/4/2022 ND ND ND ND ND ND ND ND 10/19/2022 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND

Non-Natural Gamma Emitters Less than Minimum Detectable Activity (MDA)

ND No Data - Biennial sample obtained as required.

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 105 Table E-12 Gross Concentration of Gamma Emitters in Surface Water, Precipitation and MH (subsurface drains)

(Results in units of pCi/L +/- 2)

SAMPLE DATE

MH66/SSD3 MH28 MH30 SW003 SW004 RW1 RW2 RW3 RW4 10/11/2022 ND ND ND ND ND ND ND ND 10/13/2022 ND ND ND ND ND ND ND ND 12/02/2022 ND ND ND ND ND ND ND ND

MH24 Renamed as MH66/SSD3

All Non-Natural Gamma Emitters <MDA ND No Data - Sample obtained as required.

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 106 Figure E-1 Site Map Groundwater Monitoring Wells

January 1 - December 31, 2022 Docket Nos. 50-317/50-318/72-8 107 Figure E-2 Site Map Rainwater Locations

ML23131A267

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