ML22133A068

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Independent Spent Fuel Storage Installation (ISFSI) - Independent Spent Fuel Storage Installation (ISFSI)
ML22133A068
Person / Time
Site: Peach Bottom  Constellation icon.png
Issue date: 05/13/2022
From: Disabatino R
Constellation Energy Generation
To:
Document Control Desk, Office of Nuclear Material Safety and Safeguards, Office of Nuclear Reactor Regulation
References
Download: ML22133A068 (133)


Text

May 13, 2022 U.S. Nuclear Regulatory Commission Document Control Desk Washington, DC 20555-0001 Peach Bottom Atomic Power Station Units 2 and 3 Independent Spent Fuel Storage Installation (ISFSI)

Facility Operation License DPR-12, DPR-44 and DPR-56 NRC Docket 50-171, 50-277 and 50-278 and ISFSI Docket 72-29

Subject:

Annual Radiological Environmental Operating Report 78 January 1, 2021 through December 31, 2021 In accordance with the requirements of Section 5.6.2 of the Peach Bottom Atomic Power Station (PBAPS), Units 2 and 3 Technical Specifications, this letter submits the Annual Radiological Environmental Operation Report 78. This report provides the 2021 results for the Radiological Environmental Monitoring Program (REMP) as called for in the Offsite Dose Calculation Manual.

In assessing the data collected for the REMP, we have concluded that the operation of PBAPS, Units 2 and 3, had no adverse impact on the environment. There are no commitments contained in this letter.

If you have any questions or require additional information, please do not hesitate to contact Dani Brookhart at 717-456-3056.

Sincerely, Ronald J. DiSabatino Jr., Plant Manager Peach Bottom Atomic Power Station RD/WS/RM/TJH/KH/DLB Enclosure (1)

Cc: Regional Administrator - NRC Region 1 NRC Senior Resident Inspector - Peach Bottom Atomic Power Station CCN 22-34

Docket No:

50-277 50-278 PEACH BOTTOM ATOMIC POWER STATION UNITS 2 and 3 Annual Radiological Environmental Operating Report Report No. 78 January 1 through December 31, 2021 Prepared By Teledyne Brown Engineering Environmental Services Peach Bottom Atomic Power Station Delta, PA 17314 May 2022

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i TABLE OF CONTENTS I. Executive Summary......................................................................................................... 1 II. Introduction...................................................................................................................... 3 A. Objectives............................................................................................................ 3 B. Implementation of the Objectives........................................................................ 3 C. Radiation and Radioactivity................................................................................. 3 D. Sources of Radiation........................................................................................... 4 III. Program Description....................................................................................................... 6 A. Sample Collection................................................................................................ 6 B. Sample Analysis.................................................................................................. 8 C. Data Interpretation............................................................................................... 9 D. Program Exceptions.......................................................................................... 10 IV. Program Changes........................................................................................................ 10 V. Results and Discussion................................................................................................ 11 A. Aquatic Environment......................................................................................... 11 B. Atmospheric Environment................................................................................. 13 C. Terrestrial.......................................................................................................... 13 D. Ambient Gamma Radiation............................................................................... 14 E. Independent Spent Fuel Storage Installation (ISFSI)........................................ 15 F. Land Use Census.............................................................................................. 15 G. Errata Data........................................................................................................ 16 H. Secondary Laboratory Analysis......................................................................... 16 I. Summary of Results - Quality Control (QC) Laboratory Analysis..................... 17 VI. References.................................................................................................................. 18

ii Appendices Appendix A Radiological Environmental Monitoring Report Summary Tables Table A-1 Radiological Environmental Monitoring Program Annual Summary for the Peach Bottom Atomic Power Station, 2021 Appendix B Sample Designation and Locations Tables Table B-1 Radiological Environmental Monitoring Program - Sampling Locations, Distance and Direction from Reactor Buildings, Peach Bottom Atomic Power Station, 2021 Table B-2 Radiological Environmental Monitoring Program - Summary of Sample Collection and Analytical Methods, Peach Bottom Atomic Power Station, 2021 Figures Figure B-1 Environmental Sampling Locations Within One Mile of Peach Bottom Atomic Power Station, 2021 Figure B-2 Environmental Sampling Locations Between One and Approximately Five Miles of Peach Bottom Atomic Power Station, 2021 Figure B-3 Environmental Sampling Locations Greater than Five Miles from Peach Bottom Atomic Power Station, 2021 Appendix C Data Tables and Figures Primary Laboratory Tables Table C-I.1 Concentrations of Tritium in Surface Water Samples Collected in the Vicinity of Peach Bottom Atomic Power Station, 2021 Table C-I.2 Concentrations of Low Level I-131 in Surface Water Samples Collected in the Vicinity of Peach Bottom Atomic Power Station, 2021 Table C-I.3 Concentrations of Gamma Emitters in Surface Water Samples Collected in the Vicinity of Peach Bottom Atomic Power Station, 2021 Table C-II.1 Concentrations of Gross Beta in Drinking Water Samples Collected in the Vicinity of Peach Bottom Atomic Power Station, 2021 Table C-II.2 Concentrations of Tritium in Drinking Water Samples Collected in the Vicinity of Peach Bottom Atomic Power Station, 2021

iii Table C-II.3 Concentrations of Low Level I-131 in Drinking Water Samples Collected in the Vicinity of Peach Bottom Atomic Power Station, 2021 Table C-II.4 Concentrations of Gamma Emitters in Drinking Water Samples Collected in the Vicinity of Peach Bottom Atomic Power Station, 2021 Table C-III.1 Concentrations of Gamma Emitters in Predator and Bottom Feeder (Fish) Samples Collected in the Vicinity of Peach Bottom Atomic Power Station, 2021 Table C-IV.1 Concentrations of Gamma Emitters in Sediment Samples Collected in the Vicinity of Peach Bottom Atomic Power Station, 2021 Table C-V.1 Concentrations of Gross Beta in Air Particulate Samples Collected in the Vicinity of Peach Bottom Atomic Power Station, 2021 Table C-V.2 Concentrations of Gamma Emitters in Air Particulate Samples Collected in the Vicinity of Peach Bottom Atomic Power Station, 2021 Table C-VI.1 Concentrations of I-131 in Air Iodine Samples Collected in the Vicinity of Peach Bottom Atomic Power Station, 2021 Table C-VII.1 Concentrations of Low Level I-131 in Milk Samples Collected in the Vicinity of Peach Bottom Atomic Power Station, 2021 Table C-VII.2 Concentrations of Gamma Emitters in Milk Samples Collected in the Vicinity of Peach Bottom Atomic Power Station, 2021 Table C-VIII.1 Concentrations of Gamma Emitters in Food Product Samples Collected in the Vicinity of Peach Bottom Atomic Power Station, 2021 Table C-IX.1 Quarterly DLR Results for Peach Bottom Atomic Power Station, 2021 Table C-IX.2 Annual DLR Results for Peach Bottom Atomic Power Station, 2021 Figures Figure C-1 Monthly Total Gross Beta Concentrations in Drinking Water Samples Collected in the Vicinity of PBAPS, 2021 Figure C-2 MDC Results for Fish Sampling Collected in the Vicinity of PBAPS, 2021 Figure C-3 Semi-Annual Cs-137 Concentrations in Sediment Samples Collected in the Vicinity of PBAPS, 2021 Figure C-4 Mean Weekly Gross Beta Concentrations in Air Particulate Samples Collected in the Vicinity of PBAPS, 2021 Figure C-5 Average Monthly MDC for REMP Milk Samples Collected in the Vicinity of PBAPS, 2021 Figure C-6 Annual Normalized Gamma Radiation Results from Dosimeters Collected in the Vicinity of PBAPS, 2021

iv Appendix D Data Tables and Figures QC Laboratories Tables Table D-I.1 Concentrations of Gross Beta in Drinking Water Samples Collected in the Vicinity of Peach Bottom Atomic Power Station, 2021 Table D-I.2 Concentrations of Tritium in Drinking Water Samples Collected in the Vicinity of Peach Bottom Atomic Power Station, 2021 Table D-I.3 Concentrations of I-131 in Drinking Water Samples Collected in the Vicinity of Peach Bottom Atomic Power Station, 2021 Table D-I.4 Concentrations of Gamma Emitters in Drinking Water Samples Collected in the Vicinity of Peach Bottom Atomic Power Station, 2021 Table D-II.1 Concentrations of Gross Beta in Air Particulate and I-131 in Air Iodine Samples Collected in the Vicinity of Peach Bottom Atomic Power Station, 2021 Table D-II.2 Concentrations of Gamma Emitters in Air Particulate Samples Collected in the Vicinity of Peach Bottom Atomic Power Station, 2021 Table D-III.1 Concentrations of I-131 and Gamma Emitters in Milk Samples Collected in the Vicinity of Peach Bottom Atomic Power Station, 2021 Figures Figure D-1 Comparison of Monthly Total Gross Beta Concentrations in Drinking Water Samples from Station 4L Analyzed by the Primary and QC Laboratories, 2021 Figure D-2 Comparison of Weekly Gross Beta Concentrations from Co-Located Air Particulate Locations (1Z/1A) Analyzed by the Primary and QC Laboratories, 2021 Appendix E Errata Data Appendix F Inter-Laboratory Comparison Program Acceptance Criteria and Results Tables Table F-1 Analytics Environmental Radioactivity Cross Check Program Teledyne Brown Engineering Environmental Services, 2021 Table F-2 DOEs Mixed Analyte Performance Evaluation Program (MAPEP)

Teledyne Brown Engineering Environmental Services, 2021 Table F-3 ERA Environmental Radioactivity Cross Check Program Teledyne Brown Engineering Environmental Services, 2021

v Table F-4 Analytics Environmental Radioactivity Cross Check Program Exelon Industrial Services, 2021 Table F-5 ERA Environmental Radioactivity Cross Check Program Exelon Industrial Services, 2021 Table F-6 DOEs Mixed Analyte Performance Evaluation Program (MAPEP)

GEL Laboratories (Relevant Nuclides), 2021 Table F-7 ERA Environmental Radioactivity Cross Check Program GEL Laboratories (Relevant Nuclides), 2021 Appendix G Annual Radiological Groundwater Protection Program Report (ARGPPR)

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I.

Executive Summary The 2021 Annual Radiological Environmental Operating Report (AREOR) describes the results of the Radiological Environmental Monitoring Program (REMP) conducted for Peach Bottom Atomic Power Station (PBAPS) by Exelon Nuclear and covers the period of 1 January 2021 through 31 December 2021.

Throughout that time period, 1,267 analyses were performed on 981 samples. In assessing all the data gathered for this report and comparing the results with preoperational data, it was evident that the operation of PBAPS had no adverse radiological impact on the environment.

The various media collected in the REMP include aquatic, terrestrial, airborne, and ambient radiation. The corresponding analyses performed on the collected specimen were:

Aquatic:

Surface water samples were analyzed for concentrations of Iodine-131 (I-131),

tritium (H-3) and gamma emitting nuclides. All nuclides were below minimum detectable activity.

Drinking water samples were analyzed for concentrations of gross beta, I-131, H-3, and gamma emitting nuclides. Tritium was detected just above the required lower limit of detection (LLD) of 200 pCi/L in one sample (4L). Gross beta activity was detected, but not above the required LLD of 4 pCi/L and was likely due to background radiation. All other nuclides were below minimum detectable activity.

Fish and sediment samples were analyzed for concentrations of gamma emitting nuclides. All nuclides were below minimum detectable activity.

Terrestrial:

Milk samples were analyzed for low level concentrations of I-131 and gamma emitting nuclides. Food product samples were analyzed for concentrations of gamma emitting nuclides. All power production nuclides were below minimum detectable activity.

Airborne:

Air particulates and air iodine samples were analyzed for gross beta, gamma emitting nuclides, and low level I-131. All nuclides were below minimum detectable activity. The gross beta results were less than the investigation level (1.60E-01 pCi/m3) and there were no notable differences between control and indicator locations.

Ambient Radiation:

Ambient gamma radiation levels were measured quarterly. There was no detectable ambient gamma radiation levels to the members of the public at offsite locations, indicating no impact from plant operations. The nearest resident to the ISFSI saw no detectable ambient gamma radiation levels, therefore ISFSI operations did not have an impact to members of the public.

In 2021, the doses from both liquid and gaseous effluents were conservatively calculated for the Maximum Exposed Member of the Public due to PBAPS Operation. Doses calculated were well below all Offsite Dose Calculations Manual (ODCM) limits. The results of those calculations were as follows:

Effluent Applicable Organ Estimated Dose Age Group Location

% of Applicable Limit Limit Unit Distance (meters)

Direction (toward)

Noble Gas Gamma -

Air Dose 1.18E-01 All 1.10E+03 SSE 5.90E-01 2.00E+01 mrad Noble Gas Beta - Air Dose 8.09E-02 All 1.10E+03 SSE 2.02E-01 4.00E+01 mrad Noble Gas Total Body (gamma) 1.14E-01 All 1.10E+03 SSE 1.14E+00 1.00E+01 mrem Noble Gas Skin (Beta) 1.49E-01 All 1.10E+03 SSE 4.97E-01 3.00E+01 mrem Gaseous

Iodine, Particulate, Carbon-14

& Tritium Bone 1.43E-01 Child 1.50E+03 SW 4.77E-01 3.00E+01 mrem Gaseous

Iodine, Particulate,

& Tritium Thyroid 8.76E-03 Infant 1.50E+03 SW 2.92E-02 3.00E+01 mrem Liquid Total Body (gamma) 9.40E-05 Child Site Boundary 1.57E-03 6.00E+00 mrem Liquid GI-LLI 9.82E-05 Adult 4.91E-04 2.00E+01 mrem Direct Radiation Total Body 0.00E+00 All 1.19E+03 SSE 0.00E+00 2.50E+01 mrem 40 CFR Part 190 Compliance Effluent Applicable Organ Estimated Dose Age Group Location

% of Applicable Limit Limit Unit Distance (meters)

Direction (toward)

Total Dose Total Body 1.14E-01 All 1.19E+03 SSE 4.56E-01 2.50E+01 mrem Total Dose Thyroid 8.76E-03 All 1.19E+03 SSE 1.17E-02 7.50E+01 mrem Total Dose Bone 1.43E-01 All 1.19E+03 SSE 5.72E-01 2.50E+01 mrem Total Dose Total Body 1.14E-01 All 1.19E+03 SSE 3.80E+00 3.00E+00 mrem Total Dose Bone 1.43E-01 All 1.19E+03 SSE 4.7E+00 3.00E+00 mrem Total Dose Thyroid 1.27E-01 All 1.19+03 SSE 2.30E-01 5.50E+01 mrem

II.

Introduction PBAPS is located along the Susquehanna River between Holtwood and Conowingo Dams in Peach Bottom Township, York County, Pennsylvania. PBAPS Units 2 and 3 are boiling water reactors, each with a rated full-power output of approximately 4,016 MWth while Unit 1 is a decommissioned 115 MWth High Temperature, Gas-cooled Reactor (HTGR). The initial environmental monitoring program began 5 February 1966. A summary of the Unit 1 preoperational monitoring program was presented in a previous report (1). Preoperational summary reports (2,3) for Units 2 and 3 have been previously issued and summarize the results of all analyses performed on samples collected from 5 February 1966 through 8 August 1973.

The sampling and analysis requirements are contained in the PBAPS ODCM and the ODCM Specifications (ODCMS). This AREOR covers those analyses performed by Teledyne Brown Engineering (TBE), Landauer, Exelon Industrial Services (EIS) and GEL Laboratories on samples collected during the period 01 January 2021 through 31 December 2021.

A.

Objectives The objectives of the REMP are:

1.

Provide data on measurable levels of radiation and radioactive materials in the publicly-used environs;

2.

Evaluate the principal pathways of exposure to the public as described in the ODCM and determine the relationship between quantities of radioactive material released from the plant and resultant radiation doses to members of the public.

B.

Implementation of the Objectives Implementation of the objectives is accomplished by:

1.

Identifying significant exposure pathways,

2.

Establishing baseline radiological data of media within those pathways,

3.

Continuously monitoring those media before and during plant operation to assess station radiological effects (if any) on man and the environment.

As the REMP is established to measure the impact of power plant operations (release of radionuclides) on man and the environment; it is important to understand radiation/radioactivity, the units used to measure them, and natural sources of radiation in the environment. A brief explanation is provided to differentiate between radiation from nuclear power production and other sources, be they man-made or natural. The doses produced from the other sources of radiation can be compared to the data presented in this report.

C.

Radiation and Radioactivity All matter is made of atoms. An atom is the smallest part into which

matter can be broken down and still maintain all its chemical properties.

Nuclear radiation is energy, in the form of waves or particles that is given off by unstable, radioactive atoms. Radioactive material exists naturally and has always been a part of our environment. The earth's crust, for example, contains radioactive uranium, radium, thorium and potassium.

Some radioactivity is a result of nuclear weapons testing. Examples of radioactive fallout that is normally present in environmental samples are cesium-137 (Cs-137) and strontium-90 (Sr-90). Some examples of radioactive materials released from a nuclear power plant are Cs-137, I-131, Sr-90 and cobalt-60 (Co-60).

Radiation is measured in units of millirem (mrem); much like temperature is measured in degrees. A millirem is a measure of the biological effect of the energy deposited in tissue. The natural and man-made radiation dose received in one year by the average American is 300 to 400 mrem (References 5, 6, 7 in Table 1 below). Radioactivity is measured in curies.

A curie is that amount of radioactive material needed to produce 3.70E+10 nuclear disintegrations per second. This is an extremely large amount of radioactivity in comparison to environmental radioactivity. That is why radioactivity in the environment is measured in picocuries. One picocurie is equal to 1.00E-12 (one trillionth) of a curie.

D.

Sources of Radiation As mentioned previously, naturally occurring radioactivity has always been a part of our environment. Table I shows the typical doses received from natural and man-made sources.

Table 1 Radiation Sources and Corresponding Doses (4)

NATURAL MAN-MADE Source Radiation Dose (mrem/yr)

Source Radiation Dose (mrem/yr)

Internal, inhalation (5) 228 Medical (6) 300 External, space 33 Consumer (7) 13 Internal, ingestion 29 Industrial(8) 0.3 External, terrestrial 21 Occupational 0.5 Weapons Fallout

<1 Nuclear Power Plants

<1 Approximate Total 311 Approximate Total 314 Cosmic radiation from the sun and outer space penetrates the earth's atmosphere and continuously bombards us with rays and charged particles. Some of this cosmic radiation interacts with gases and particles in the atmosphere, making them radioactive in turn. These radioactive byproducts from cosmic ray bombardment are referred to as cosmogenic radionuclides. Isotopes such as beryllium-7 (Be-7) and carbon-14 (C-14) are formed in this way. Exposure to cosmic and cosmogenic sources of radioactivity results in a dose of 33 mrem/yr.

Additionally, natural radioactivity is in our body, in the food we eat (about 29 mrem/yr), in the ground we walk on (about 21 mrem/yr), and in the air we breathe (about 228 mrem/yr). One percent of all potassium in nature is the radioactive potassium-40 (K-40). The majority of a person's annual dose results from exposure to radon and thoron in the air we breathe.

These gases and their radioactive decay products arise from the decay of naturally occurring uranium, thorium and radium in soil and in building products such as brick, stone and concrete. Radon and thoron levels vary greatly with location, primarily due to changes in the concentration of uranium and thorium in the soil. Residents at some locations in Colorado, New York, Pennsylvania, and New Jersey have a higher annual dose as a result of higher levels of radon/thoron gases in these areas. In total, these various sources of naturally occurring radiation and radioactivity contribute to a total dose of about 311 mrem per year (mrem/yr).

In addition to natural radiation, we are normally exposed to radiation from a number of man-made sources. The single largest dose from man-made sources result from therapeutic and diagnostic applications of x-rays and radiopharmaceuticals. The annual dose to an individual in the U.S. from medical and dental exposure is about 300 mrem. Consumer products, such as televisions and smoke detectors, contribute about 13 mrem/yr.

Much smaller doses result from weapons fallout and nuclear power plants (less than 1 mrem/yr). Typically, the average person in the United States receives about 314 mrem/yr from man-made sources.

Some of the natural radioactive nuclides discussed above were identified in PBAPS REMP samples. The typical power production radionuclides, described in the next sections, were not identified and thus it can be concluded that PBAPS did not impact man and the environs during the 2021 operating period.

III.

Program Description A.

Sample Collection Exelon Industrial Services (EIS) collected samples for the REMP for PBAPS Exelon Nuclear. This section describes the collection methods used by EIS to obtain environmental samples for the PBAPS REMP in 2021. Sample locations and descriptions can be found in Table B-1 and Figures B-1 through B-3, Appendix B. The collection procedures used by EIS are listed in Table B-2, Appendix B.

Aquatic Environment The aquatic environment was evaluated by performing radiological analyses on samples of surface water, drinking water, fish and sediment. Surface water is sampled from two locations as prescribed by the ODCM: one upstream (1LL) and one downstream (1MM) of the plant discharge canal.

Drinking water is sampled from a control location (6I) and up to 3 locations nearest to public drinking water supplies. Two locations are identified in the ODCM as the closest drinking water supplies, the Conowingo Dam (4L) and Chester Water Authority (13B). All samples were collected weekly by automatic sampling equipment or as grab samples. Weekly samples from each location were composited into two one-gallon monthly samples for analysis. A separate quarterly composite of the monthly samples was also collected.

Fish sample collection locations required by the ODCM are in an area close to the discharge of PBAPS (4) and a control location, unaffected by plant discharge (6). These samples were comprised of the flesh of commercially and recreationally important species specific to the environs around PBAPS.

Fish samples were collected semiannually from two groups: Bottom Feeder (channel catfish, flathead catfish and carp) and Predator (smallmouth and hybrid striped bass), as these are the types of fish commonly collected by the public from the river around PBAPS. The total weight of fish flesh was approximately 1000 grams. The samples were preserved on ice for shipping to the laboratory.

The ODCM requires one sediment sample to be collected downstream of the plant in an area with existing or potential recreational value. The REMP collects samples from three locations (4J, 4T and 6F; 6F is the control).

Sediment samples, composed of recently deposited substrate, were collected semiannually. Multiple grab samples of the sediment were collected to obtain an approximately homogenous, representative sample totaling 1000 grams.

Terrestrial Environment The terrestrial environment was evaluated by performing radiological analyses on milk and food product samples. The ODCM requires milk samples at three locations with the highest dose potential, within three miles of PBAPS and one sample at a control location. The REMP meets these requirements and samples extra locations. Milk samples were collected

biweekly at five locations (J, R, S, X and V; V is the control) from April through November, when the cows were on pasture, and monthly from December through March, when the cows were primarily on feed. Six additional locations (C, D, E, P, W and Y; C and E are the controls) were sampled quarterly. Two-gallon samples were collected directly from the bulk tank at each location, preserved with sodium bisulfite, and shipped promptly to the laboratory.

The ODCM requires food products to be collected from the area of highest dose impact and a control location if milk sampling is unavailable in those locations. Milk sampling occurs in most every sector, except for SSE, S and WSW, where gardens are established for sampling. Food product samples, comprised of annual broad green leaf vegetation, were collected monthly at four locations (1C, 2Q, 3Q and 55; 55 is the control) from June through September. Typically, the planting season starts late April/early May, with the plants gaining sufficient mass for collection in late June or July.

Approximately 1000 g of unwashed samples were collected in plastic bags and shipped promptly to the laboratory, but sample size varied on garden production.

Airborne Environment The airborne atmospheric environment was evaluated by performing radiological analyses on air particulate and radioiodine samples. The ODCM requires sampling from five locations, including three site boundary locations with greatest dose impact, one location within a local community with the highest dose impact, and one control location. Air particulate and radioiodine samples were collected and analyzed weekly from five locations (1B, 1C, 1Z/1A, 3A and 5H2; 5H2 is the control, 1A is the duplicate QA location). Airborne iodine and particulate samples were obtained at each location using a vacuum pump to pull air through a glass fiber filter and charcoal cartridge. The pumps were run continuously and sampled air at the rate of approximately 1 cubic foot per minute to obtain a minimum total volume of 280 cubic meters. The weekly filters were composited for a quarterly sample.

Ambient Gamma Radiation The ambient gamma radiation in the areas surrounding PBAPS is measured using dosimeters, which are exposed to ambient radiation in the field and exchanged quarterly. The ODCM requires at least 40 routine monitoring stations with two or more dosimeters at each location for continuous monitoring. The REMP contains 48 dosimeter monitoring locations.

Optically-Stimulated Luminescent Dosimeters (OSLD) replaced the Thermo-Luminescent Dosimeter (TLD) starting in 2012. However, PBAPS continued using TLD in addition to OSLD to compare the two technologies, although only the OSLD data is reported. TLD field deployment was discontinued in 2021.

The OSLD locations were placed on and around the PBAPS site as follows:

Site boundary monitoring consists of 19 locations (1A, 1B, 1C, 1D, 1E, 1F, 1G, 1H, 1I, 1J, 1K, 1L, 1M, 1NN, 1P, 1Q, 1R, 2, and 40), near and within the site perimeter representing fence post doses (i.e., at locations where the doses will be potentially greater than maximum annual off-site doses).

Intermediate distance monitoring consists of 23 locations (14, 15, 17, 22, 23, 26, 27, 31A, 32, 3A, 42, 43, 44, 45, 46, 47, 48, 49, 4K, 5, 50, 51 and 6B),

extending to approximately 5 miles from the site and designed to measure possible exposures to close-in population.

Six locations (16, 18, 19, 24, 2B and 1T) represent control and special interests areas such as population centers, schools, and nearest residents.

The specific dosimeter locations were determined by the following criteria:

1.

The presence of relatively dense population, nearby residences, schools, and control locations;

2.

Site meteorological data taking into account distance and elevation for each of the sixteen 22.5 degree sectors around the site, where estimated annual dose from PBAPS, if any, would be more significant;

3.

And on hills free from local obstructions and within sight of the vents (where practical).

Each dosimetry location in the environment has 2 OSLD and 2 TLD dosimeters which were enclosed in plastic as a moisture barrier.

Dosimeter housing are mesh plastic tubes, aligned horizontally and oriented such that dosimeter windows face the plant. Dosimeters themselves were placed vertically in the tubes so that no dosimeter was covered by another dosimeter and all dosimeters properly faced the plant.

B.

Sample Analysis This section describes the analytical methods used by TBE, EIS and GEL Labs to analyze the environmental samples for radioactivity. The analytical procedures used by the laboratories are listed in Table B-2, Appendix B.

The required OCDM analyses include:

1.

Concentrations of beta emitters in drinking water and air particulates;

2.

Concentrations of gamma emitting nuclides in surface and drinking water, air particulates, milk, fish, sediment and food products;

3.

Concentrations of tritium in surface and drinking water;

4.

Concentrations of I-131 in air, milk, and food products. Although not required by the ODCM, I-131 is also analyzed in drinking and surface water;

5.

Ambient gamma radiation levels at various site environs.

C.

Data Interpretation The radiological environmental and direct radiation data collected prior to PBAPS becoming operational was used as a baseline with which the 2021 operational data were compared. In addition, data were compared to previous years operational data for consistency and trending. Several factors are important in the interpretation of the data.

1.

Lower Limit of Detection and Minimum Detectable Concentration The lower limit of detection (LLD) is defined as the smallest concentration of radioactive material in a sample that would yield a net count (above background) that would be detected with only a 5% probability of falsely concluding that a blank observation represents a "real" signal. The LLD is intended as a before-the-fact (a priori) estimate of a system (including instrumentation, procedure and sample type) and not as an after-the-fact (a posteriori) measurement. All analyses are designed to achieve the required detection limits for environmental samples, as described in the PBAPS ODCM.

The minimum detectable concentration or activity (MDC or MDA) is defined as the after-the-fact (a posteriori) estimate determined during the analysis of the sample.

2.

Net Activity Calculation and Reporting of Results Net activity for a sample is calculated by subtracting background activity from the sample activity. Since the REMP measures extremely small changes in radioactivity in the environment, background variations can result in sample activity being lower than the background activity causing a negative number. MDC is reported in all cases where positive activity was not detected. In previous years, when net activity was reported, a lower baseline is seen in trending when compared to 2021 results.

Gamma spectroscopy results for each type of sample were grouped as follows:

zinc-65 (Zn-65), niobium-95 (Nb-95), zirconium-95 (Zr-95),

I-131, cesium-134 (Cs-134), Cs-137, barium-140 (Ba-140), and lanthanum-140 (La-140) were reported.

  • For air particulates, six nuclides, Be-7, Mn-54, Co-58, Co-60, Cs-134 and Cs-137 were reported.
  • For milk, six nuclides, K-40, I-131, Cs-134, Cs-137, Ba-140 and La-140 were reported.

Positive activity values (greater than MDC) were recorded and the mean and two standard deviation of the results were calculated.

The standard deviation represents the variability of measured results for different samples of the same media rather than a single analysis uncertainty.

D.

Program Exceptions For 2021, the PBAPS REMP had a sample collection recovery rate of

> 99%. The exceptions to this program are listed below:

Table 2 LIST OF SAMPLE ANOMALIES Sample Type Location Code Collection Date(s)

Reason Food Products 55 September, 2021 Only one vegetation species produced due to farm owner cutting down plants and tilling (IR4451358)

Water 13B 10/19 - 10/25 No sample produced due to Chester Water Authority station being down for maintenance (IR4454201)

Table 3 LIST OF MISSING SAMPLES Sample Type Location Code Collection Date(s)

Reason AP/AI*

1Z & 1A 09/08-09/21 Loss of power from a downed power line (IR4446927)

  • AP/AI = Air Particulates/Air Iodine Each program exception was reviewed to understand the causes of the program exception, and to implement corrective actions as necessary.

Sampling and maintenance errors were reviewed with the personnel involved to prevent a recurrence. Occasional equipment breakdowns and power outages were unavoidable.

IV.

Program Changes Milk Farm U was removed from the program and replaced with Farm S (19100 ft SE of site). Farm S had been in the program but was not in the ODCM. This change was made because Farm U no longer wished to participate in the REMP.

There were no other program changes in 2021.

V.

Results and Discussion Appendix A contains a summary of all 2021 PBAPS REMP results which meets the requirement of Table 3 of NUREG 1302 'Branch Technical Position Paper'9. Table A-1 lists results by each sample media and analyses performed. The total number of analyses performed, required LLD, the number of positive results for each indicator and control location are also listed. From the positive results identified (greater than the MDA) the mean value, range and station locations with highest annual mean are listed. Commonly-identified nuclides are gross beta, K-40, and Be-7.

A.

Aquatic Environment

1.

Surface Water A summary of the 2021 analysis results for surface water samples from stations 1LL and 1MM are listed below:

Tritium Quarterly samples were analyzed for tritium activity. No tritium activity was detected and the required LLD was met.

(Table C-I.1, Appendix C)

Iodine Monthly samples were analyzed for low level I-131. All results were less than the MDC and the required LLD was met.

(Table C-I.2, Appendix C)

Gamma Spectrometry Monthly samples were analyzed for gamma emitting nuclides. All nuclides were less than the MDC and all required LLDs were met.

(Table C-I.3, Appendix C)

2.

Drinking Water The results from the drinking water samples collected in 2021 from stations 13B, 4L and 6I are described below:

Gross Beta Samples from all locations were analyzed monthly for concentrations of gross beta activity (Table C-II.1 and Figure C-1 Appendix C). Gross beta activity was detected in 18 of 36 samples. The values ranged from 1.8 to 3.7 pCi/L with a mean value of 2.4 +/- 1.5 pCi/L. The mean detected gross beta activity was less than the required LLD (4 pCi/L) which indicates that the measurement technique was even more sensitive than required. The detectable gross beta activity was well below the procedural investigation level (15 pCi/L). Concentrations detected were generally below those detected in previous years.

Tritium Monthly samples were composited quarterly and analyzed for tritium activity. Tritium activity was detected in 1 of 12 samples at a concentration of 202 pCi/L. All other samples were less than required MDC (200 pCi/L) and the required LLD was met.

(Table C-II.2, Appendix C)

Iodine Monthly samples were analyzed for low level I-131. All results were less than the MDC and the required LLD was met.

(Table C-II.3, Appendix C)

Gamma Spectrometry Samples from the three locations were analyzed monthly for gamma emitting nuclides. All nuclides were less than the MDC and all required LLDs were met. (Table C-II.4, Appendix C)

3.

Fish Results from fish samples collected at locations 4 and 6 in 2021 are described below:

Gamma Spectrometry The edible portions of the collected fish samples were analyzed semiannually for gamma emitting nuclides (Table C-III.1, Appendix C). Naturally occurring K-40 was found at all stations and ranged from 2,166 to 4,250 pCi/kg (wet), with a mean value of 3,091 +/- 1,219 pCi/kg (wet), consistent with levels detected in previous years. No fission or activation products, due to plant operations were found in 2021 and all required LLDs were met. Figure C-2, Appendix C, displays the various gamma radionuclide MDC results for locations 4 and 6, based on the type of fish collected. All MDC results are less than the nuclide-specific LLDs. The last 15-year average Cs-137 MDC is also shown to trend 2021 results with historical results. There have been no detectable levels of Cs-137 in fish since 1983.

4.

Sediment Sediment samples were collected at locations 6F, 4J, and 4T and the results are described below:

Gamma Spectrometry Sediment samples were analyzed for gamma emitting nuclides (Table C-IV.1, Appendix C). K-40 was found in all locations and ranged from 11,310 to 23,170 pCi/kg (dry) with a mean value of 15,150 +/- 9,067 pCi/kg (dry). No fission or activation products were found and all LLDs were met. The Cs-137 MDC results are displayed in Figure C-3, Appendix C, along with the 20-year average results.

B.

Atmospheric Environment

1.

Airborne Particulates Continuous air particulate samples were collected from five locations.

The five locations were separated into three groups: Group I represents locations within the PBAPS site boundary (1B, 1C and 1Z/1A), Group II represents the location of the closest local community (3A) and Group III represents the control location at a remote distance from PBAPS (5H2). 1A results are discussed in Section H, Secondary Laboratory Analysis. The results from samples collected in 2021 are described below:

Gross Beta Weekly samples were analyzed for concentrations of beta-emitters (Tables C-V.1, Appendix C). Detectable gross beta activity was observed at all locations. Onsite results ranged from 7E-3 to 44E-3 pCi/m3, with a mean of 19E-3 +/- 13E-3 pCi/m3. The results from local communities ranged from 10E-3 to 39E-3 pCi/m3 with a mean of 22E-3 +/- 13E-3 pCi/m3. The control results ranged from 7E-3 to 38E-3 pCi/m3 with a mean of 19E-3 +/- 14E-3 pCi/m3.

The range of detectable results and mean value from all locations are the same within error, indicating the gross beta activity is not a result of the operation of PBAPS, as shown in Figure C-4, Appendix C. In addition, a comparison of the 2021 air particulate data with historical data indicates a decreasing trend in gross beta activity since initial operation of the plant (Figure C-4, Appendix C).

Gamma Spectrometry Quarterly samples were analyzed for gamma emitting nuclides (Table C-V.2, Appendix C). Naturally occurring Be-7 activity, from cosmic rays, was detected in all 20 samples. The values ranged from 54E-3 to 130E-3 pCi/m3, with a mean value of 87E-3 +/- 34E-3pCi/m3. All power production nuclides were less than the MDC and all required LLDs were met.

2.

Airborne Iodine Weekly samples were also analyzed for low-level I-131. All results were less than the MDC for I-131 and the required LLD was met.

(Table C-VI.1, Appendix C)

C.

Terrestrial

1.

Milk During 2021, 150 milk samples were collected and analyzed from the following locations: D, J, P, R, S, W, X, Y (indicators) and C, E, V (controls). The results are described below:

Iodine-131 Milk samples from all locations were analyzed for concentrations of I-131 (Tables C-VII.1, Appendix C). All results were less than the MDC for I-131 and all required LLDs were met. Figure C-5 displays the 2021 milk I-131 results for both indicator and control locations. All results are less than the LLD (1 pCi/L) and much less than the reporting level (3 pCi/L).

Gamma Spectrometry Milk samples from all locations were analyzed for concentrations of gamma emitting nuclides (Table C-VII.2, Appendix C). Naturally occurring K-40 was found in all samples and ranged from 973 to 1,871 pCi/l, with a mean value of 1242 +/- 315 pCi/L. All other nuclides were less than the MDC and all required LLDs were met.

2021 Cs-134 and Cs-137 MDC results are plotted in Figure C-5 with the required LLDs and Reporting Levels. All results are much less than the LLDs and reporting levels. The last 15-year average MDC of Cs-137 in milk is also plotted in Figure C-5, Appendix C. There is no statistical difference between the 2021 MDC Cs-137 results and the 15-year historical MDC.

2.

Food Products Throughout 2021, 46 samples of various green leafy vegetation (Swiss chard, cabbage, collards, kale, broccoli, etc.) were collected and analyzed for concentrations of gamma emitting nuclides (Table C-VIII.1, Appendix C). The results are discussed below:

Gamma Spectrometry Naturally occurring Be-7 activity was found in 23 of 46 samples and ranged from 269 to 4,611 pCi/kg (wet), with a mean of 887 +/- 3,950 pCi/kg (wet). Also, naturally occurring K-40 activity was found in all samples and ranged from 1,142 to 9,617 pCi/kg (wet), with a mean of 4,526 +/- 3,399 pCi/kg (wet). All power production nuclides were less than the MDC and all required LLDs were met.

D.

Ambient Gamma Radiation Results of OSLD measurements are listed in Tables C-IX.1 and C-IX.2 and Figure C-6, Appendix C.

In 2019, six years of OSLD data (2012-2018) were re-evaluated with the new methodology presented in Exelon corporate procedure CY-AA-170-1001, in order to determine a background dose and baseline for each location in the REMP. Detectable Facility Dose is any normalized net dose above the sum of the normalized mean background dose and minimum differential dose (BQ/A + MDDQ/A) and is reported both quarterly and annually for each location. Only Quarterly and Annual Normalized Net Dose for each location is reported in Table C-IX.1 and C-IX.2.

The net dose is calculated by subtracting a control transit dosimeter and extraneous dose rather than a control or background location dose. The net dose is normalized to a standard 91-day quarter rather than previously reported monthly doses. Figure C-6 displays the BA + MDDA for each location as a dash mark, and the annual normalized net dose is shown as a column graph. Any column above the dash mark, would indicate annual positive facility related dose.

One location (1L) had positive quarterly facility dose (6.2 mrem) in the 2nd quarter and positive annual facility dose (17.4 mrem/yr). This location is at the site boundary by the river and elevated dose was due to equipment moves and there was no impact on dose to members of the public. All other locations showed no normalized net quarterly dose above the BA + MDDA, therefore, there is no detectable ambient gamma radiation to the members of the public due to PBAPS operations.

E.

Independent Spent Fuel Storage Installation (ISFSI)

ISFSI was initiated in June 2000. Site boundary OSLDs which measure the ambient gamma radiation closest to ISFSI are locations 1A, 1D, 1M, 1P, 1Q, 1R, with 1R being the closest. Location 2B is the nearest real resident which could be impacted by ISFSI. Location 2B, follows closely with values from locations 1A, 1D and controls, indicating no impact from ISFSI on nearest real resident. Data from location 2B is used to demonstrate compliance to both 40CFR190 and 10CFR72.104 limits. All radiation levels are well below regulatory limits.

In 2019, a six year data set (2012-2018) was used to determine the background dose at each location. In 2021, there was no detectable facility-related dose at any location. Detectable facility-related dose at 1R in the 3Q of 2019 (6.4 mrem/std. qtr), lead to detectable annual facility-related dose (15.5 mrem/yr). This was the first time PB reported facility-related dose due to ISFSI, which was expected due to the increasing trends seen at 1R over the years.

Also in 2019, the ISFSI pad was filled with its last TN-68 cask.

Construction began in 2020 on a second ISFSI pad which was loaded with Holtec casks. Facility-related dose is expected to increase due to the second ISFSI pad, but still remain below the 40CFR190 and 10CFR72.104 limits.

F.

Land Use Census A Land Use Survey, conducted during the fall of 2021, was performed by Exelon Industrial Services (EIS), to comply with Section 3.8.E.2 of PBAPS's ODCM Specifications. The survey documented the nearest milk-producing and meat animal, nearest residence, and garden larger than 500 square feet in each of the sixteen meteorological sectors out to five miles.

Also, because PBAPS is an elevated release facility, an additional requirement of identifying all gardens larger than 500 square feet and every dairy operation within three (3) miles was included in the survey. The

distance and direction of all locations were positioned using Global Positioning System (GPS) technology. The results of this survey are summarized below.

There was no change in nearest residents compared to the 2020 report.

There were gardens identified in all sectors except the NNW sector. Ten (10) new gardens were located this year in S, SSW, WSW, W, WNW and NW sectors within three (3) miles of the Peach Bottom release vents. The nearest gardens in the NW sector has been updated from the 2020 report; all other sectors are the same as in the 2020 report.

Animals used for meat consumption were identified in all 16 sectors. Four (4) new sites were identified this year in SSE, SSW, W and WNW sectors, with the nearest meat animal in the SSE sector and has been updated from the 2020 report. The nearest animal in all other sectors remains the same as in last years report. Dairy sites were identified in 12 of 16 sectors. There were no new dairy sites there were no changes in nearest milk-producing animal in any sector.

Location of the Nearest Residence, Garden, Milk, Meat, Animal within a Five-Mile Radius of PBASP Reactor Building Exhaust Vents Sector Residence Feet Garden Feet Milk Farm Feet Meat Animal Feet 1

N 12,362 14,003 14,183 14,183 2 NNE 11,112 11,041 10,843 10,843 3

NE 10,080 10,004 10,492 10,080 4 ENE 10,495 11,554 10,925*

10,925 5

E 10,066 14,540 14,471 13,712 6 ESE 16,085 19,109 20,154 16,085 7

SE 10,772 10,772 19,134*

19,134 8 SSE 3,912 3,912 14,392 9

S 5,545 5,545 9,247 10 SSW 6,072 6,418 11,602 7,187 11 SW 4,755 4,865 4,860*

4,860 12 WSW 4,036 7,487 4,204 13 W

5,327 5,327 5,136*

5,136 14 WNW 2,928 4,192 22,124 3,926 15 NW 2,948 7,429 9,545 7,582 16 NNW 5,124 5,124

  • Farm included in the REMP G.

Errata Data There was no errata data for 2021.

H.

Secondary Laboratory Analysis Appendix D of this report presents the results of data analyses performed by the QC laboratory, EIS and GEL. Duplicate samples were obtained from several locations and analyzed by both the primary and QC laboratories. GEL was only used for H-3 analyses of water samples because EIS could not perform those analyses. Comparisons of the results for all media were within expected ranges. (Figures D-1 and D-2)

I.

Summary of Results - Quality Control (QC) Laboratory Analysis The primary and secondary laboratories analyzed Performance Evaluation (PE) samples of air particulate, air iodine, milk, soil, food products and water matrices (Appendix E). The PE samples, supplied by Eckert &

Ziegler Analytics, Inc., Environmental Resource Associates (ERA) and DOEs Mixed Analyte Performance Evaluation Program (MAPEP), were evaluated against a pre-set acceptance criteria described in Appendix F.

For the Teledyne Brown Engineering (TBE) laboratory, 146 out of 154 analyses performed met the specified acceptance criteria. Seven analyses (water - Fe-55, Gross Beta (2), H-3; AP - Gross Alpha, soil - Ni-63 (2) did not meet the specified acceptance criteria and are documented in Appendix F. TBE has addressed each issue through the TBE Corrective Action Program.

The EIS laboratory analyzed the following nuclides for PBAPS: gross beta, gamma and low-level iodine in water, air particulate (filter), charcoal (cartridge) and milk matrices. For the EIS laboratory, 135 of 135 analyses met the specified acceptance criteria in 2021. All analyses met the specified acceptance criteria.

For the GEL laboratory, the only nuclide analyzed was tritium in water and 8 of 8 analyses met the specified acceptance criteria.

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

VI.

References

1.

Preoperational Environs Radioactivity Survey Summary Report, March 1960 through January 1966. (September 1967)

2.

Interex Corporation, Peach Bottom Atomic Power Station Regional Environs Radiation Monitoring Program Preoperational Summary Report, Units 2 and 3, 5 February 1966 through 8 August 1973, June 1977, Natick, Massachusetts

3.

Radiation Management Corporation Publication, Peach Bottom Atomic Power Station Preoperational Radiological Monitoring Report for Unit 2 and 3, January 1974, Philadelphia, Pennsylvania

4.

Information from NCRP Reports 160 and 94

5.

Primarily from airborne radon and its radioactive progeny

6.

Includes CT (147 mrem), nuclear medicine (77 mrem), interventional fluoroscopy (43 mrem) and conventional radiography and fluoroscopy (33 mrem)

7.

Primarily from cigarette smoking (4.6 mrem), commercial air travel (3.4 mrem), building materials (3.5 mrem), and mining and agriculture (0.8 mrem)

8.

Industrial, security, medical, educational, and research

9.

Offsite Dose Calculation Manual Guidance: Standard Radiological Effluent Controls for Boiling Water Reactors, Generic Letter 89-01, Supplement No. 1 (NUREG-1302), April 1991

10.

American National Standards Institute/Health Physics Society, (ANSI/HPS) N13.37-2014, Environmental Dosimetry - Criteria for System Design and Implementation

11.

U.S. Nuclear Regulatory Commission, Regulatory Guide 4.13, Revision 2, Environmental Dosimetry - Performance, Specifications, Testing, and Data Analysis, June 2020

12.

Code of Federal Regulations 40 CFR 190, Environmental Radiation Protection Standards for Nuclear Power Operations, 1977

APPENDIX A RADIOLOGICAL ENVIRONMENTAL MONITORING REPORT

SUMMARY

Intentionally left blank

NAME OF FACILITY:

PEACH BOTTOM ATOMIC POWER STATION DOCKET NUMBER:

50-277 & 50-278 LOCATION OF FACILITY:

YORK COUNTY, PA REPORTING PERIOD:

2021 INDICATOR CONTROL MEDIUM OR REQUIRED LOCATIONS LOCATION NUMBER OF PATHWAY SAMPLED TYPES OF NUMBER OF LOWER LIMIT MEAN (M)

MEAN (M)

MEAN (M)

STATION #

NONROUTINE (UNIT OF ANALYSIS ANALYSIS OF DETECTION (F)

(F)

(F)

NAME REPORTED MEASUREMENT)

PERFORMED PERFORMED (LLD)

RANGE RANGE RANGE DISTANCE AND DIRECTION MEASUREMENTS SURFACE WATER H-3 8

200

<LLD

<LLD 0

(PCI/LITER)

I-131 24 1

<LLD

<LLD 0

GAMMA 24 Mn-54 15

<LLD

<LLD 0

Co-58 15

<LLD

<LLD 0

Fe-59 30

<LLD

<LLD 0

Co-60 15

<LLD

<LLD 0

Zn-65 30

<LLD

<LLD 0

Nb-95 15

<LLD

<LLD 0

Zr-95 30

<LLD

<LLD 0

Cs-134 15

<LLD

<LLD 0

Cs-137 18

<LLD

<LLD 0

Ba-140 60

<LLD

<LLD 0

La-140 15

<LLD

<LLD 0

DRINKING WATER GR-B 36 4

2.5 2.3 2.6 13B INDICATOR 0

(PCI/LITER)

(11/24)

(5/12)

(6/12)

CHESTER WATER AUTH. SUSQUEHANNA PUMPING STA.

1.8 - 3.7 1.8 - 3.3 1.8 - 3.7 13306 FEET ESE H-3 12 200 202

<LLD 202 4L INDICATOR 0

(1/8)

(1/4)

CONOWINGO DAM EL 33' MSL 45900 FEET SE I-131 (LOW LVL) 36 1

<LLD

<LLD 0

GAMMA 36 MN-54 15

<LLD

<LLD 0

CO-58 15

<LLD

<LLD 0

FE-59 30

<LLD

<LLD 0

CO-60 15

<LLD

<LLD 0

ZN-65 30

<LLD

<LLD 0

NB-95 15

<LLD

<LLD 0

ZR-95 30

<LLD

<LLD 0

CS-134 15

<LLD

<LLD 0

CS-137 18

<LLD

<LLD 0

BA-140 60

<LLD

<LLD 0

LA-140 15

<LLD

<LLD 0

LOCATION WITH HIGHEST ANNUAL MEAN (M)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR PEACH BOTTOM ATOMIC POWER STATION, 2021 (M) The Mean Values are calculated using the positive values. (F) Fraction of detectable measurement are indicated in parentheses.

A-1

NAME OF FACILITY:

PEACH BOTTOM ATOMIC POWER STATION DOCKET NUMBER:

50-277 & 50-278 LOCATION OF FACILITY:

YORK COUNTY, PA REPORTING PERIOD:

2021 INDICATOR CONTROL MEDIUM OR REQUIRED LOCATIONS LOCATION NUMBER OF PATHWAY SAMPLED TYPES OF NUMBER OF LOWER LIMIT MEAN (M)

MEAN (M)

MEAN (M)

STATION #

NONROUTINE (UNIT OF ANALYSIS ANALYSIS OF DETECTION (F)

(F)

(F)

NAME REPORTED MEASUREMENT)

PERFORMED PERFORMED (LLD)

RANGE RANGE RANGE DISTANCE AND DIRECTION MEASUREMENTS LOCATION WITH HIGHEST ANNUAL MEAN (M)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR PEACH BOTTOM ATOMIC POWER STATION, 2021 BOTTOM FEEDER GAMMA 4

(PCI/KG WET)

K-40 NA 2870 3008 3008 6 CONTROL 0

(2/2)

(2/2)

(2/2)

HOLTWOOD POND 2166 - 3574 2911 - 3104 2911 - 3104 50000 - 70000 FEET NW MN-54 130

<LLD

<LLD 0

CO-58 130

<LLD

<LLD 0

FE-59 260

<LLD

<LLD 0

CO-60 130

<LLD

<LLD 0

ZN-65 260

<LLD

<LLD 0

CS-134 130

<LLD

<LLD 0

CS-137 150

<LLD

<LLD 0

PREDATOR GAMMA 4

(PCI/KG WET)

K-40 NA 3582 2905 3582 4 INDICATOR 0

(2/2)

(2/2)

(2/2)

CONOWINGO POND 2914 - 4250 2773 - 3036 2914 - 4250 600-10000 FEET SE MN-54 130

<LLD

<LLD 0

CO-58 130

<LLD

<LLD 0

FE-59 260

<LLD

<LLD 0

CO-60 130

<LLD

<LLD 0

ZN-65 260

<LLD

<LLD 0

CS-134 130

<LLD

<LLD 0

CS-137 150

<LLD

<LLD 0

SEDIMENT GAMMA 6

(PCI/KG DRY)

K-40 NA 16080 13290 20480 4T INDICATOR 0

(4/4)

(2/2)

(2/2)

CONOWINGO POND NEAR CONOWINGO DAM 11310 - 23170 12970 - 13610 17790 - 23170 41800 FEET SE MN-54 NA

<LLD

<LLD 0

CO-58 NA

<LLD

<LLD 0

CO-60 NA

<LLD

<LLD 0

CS-134 150

<LLD

<LLD 0

CS-137 180

<LLD

<LLD 0

(M) The Mean Values are calculated using the positive values. (F) Fraction of detectable measurement are indicated in parentheses.

A-2

NAME OF FACILITY:

PEACH BOTTOM ATOMIC POWER STATION DOCKET NUMBER:

50-277 & 50-278 LOCATION OF FACILITY:

YORK COUNTY, PA REPORTING PERIOD:

2021 INDICATOR CONTROL MEDIUM OR REQUIRED LOCATIONS LOCATION NUMBER OF PATHWAY SAMPLED TYPES OF NUMBER OF LOWER LIMIT MEAN (M)

MEAN (M)

MEAN (M)

STATION #

NONROUTINE (UNIT OF ANALYSIS ANALYSIS OF DETECTION (F)

(F)

(F)

NAME REPORTED MEASUREMENT)

PERFORMED PERFORMED (LLD)

RANGE RANGE RANGE DISTANCE AND DIRECTION MEASUREMENTS LOCATION WITH HIGHEST ANNUAL MEAN (M)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR PEACH BOTTOM ATOMIC POWER STATION, 2021 AIR PARTICULATE GR-B 263 10 20 19 22 3A INDICATOR 0

(E-3 PCI/CU.METER)

(210/210)

(53/53)

(53/53)

DELTA PA SUBSTATION 7 - 44 7 - 38 10 - 39 2500 FEET NW GAMMA 20 BE-7 NA 87 87 100 3A INDICATOR 0

(16/16)

(4/4)

(4/4)

DELTA PA SUBSTATION 54 - 130 67 - 107 85 - 130 19300 FEET SW MN-54 NA

<LLD

<LLD 0

CO-58 NA

<LLD

<LLD 0

CO-60 NA

<LLD

<LLD 0

CS-134 50

<LLD

<LLD 0

CS-137 60

<LLD

<LLD 0

AIR IODINE GAMMA 263 (E-3 PCI/CU.METER)

I-131 70

<LLD

<LLD 0

MILK I-131 (LOW LVL) 129 1

<LLD

<LLD 0

(PCI/LITER)

GAMMA 129 K-40 NA 1239 1252 1304 Y INDICATOR 0

(100/100)

(29/29)

(4/4) 973 - 1871 1087 - 1435 1280 - 1337 10500 FEET NE CS-134 15

<LLD

<LLD 0

CS-137 18

<LLD

<LLD 0

BA-140 60

<LLD

<LLD 0

LA-140 15

<LLD

<LLD 0

(M) The Mean Values are calculated using the positive values. (F) Fraction of detectable measurement are indicated in parentheses.

A-3

NAME OF FACILITY:

PEACH BOTTOM ATOMIC POWER STATION DOCKET NUMBER:

50-277 & 50-278 LOCATION OF FACILITY:

YORK COUNTY, PA REPORTING PERIOD:

2021 INDICATOR CONTROL MEDIUM OR REQUIRED LOCATIONS LOCATION NUMBER OF PATHWAY SAMPLED TYPES OF NUMBER OF LOWER LIMIT MEAN (M)

MEAN (M)

MEAN (M)

STATION #

NONROUTINE (UNIT OF ANALYSIS ANALYSIS OF DETECTION (F)

(F)

(F)

NAME REPORTED MEASUREMENT)

PERFORMED PERFORMED (LLD)

RANGE RANGE RANGE DISTANCE AND DIRECTION MEASUREMENTS LOCATION WITH HIGHEST ANNUAL MEAN (M)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR PEACH BOTTOM ATOMIC POWER STATION, 2021 VEGETATION GAMMA 46 (PCI/KG WET)

BE-7 NA 1017 1108 1631 3Q INDICATOR 0

(15/36)

(8/10)

(5/12) 103 FLINTVILLE RD.

269 - 4611 373 - 3677 356 - 4611 9500 FEET W K-40 NA 4172 5804 5804 55 CONTROL 0

(36/36)

(10/10)

(10/10)

NE SECTOR 1142 - 7605 3616 - 9617 3616 - 9617 51900 FEET NE MN-54 NA

<LLD

<LLD 0

CO-58 NA

<LLD

<LLD 0

CO-60 NA

<LLD

<LLD 0

I-131 60

<LLD

<LLD 0

CS-134 60

<LLD

<LLD 0

CS-137 80

<LLD

<LLD 0

DIRECT RADIATION OSLD-QUARTERLY 192 NA 6.2 NA 6.2 0

NET NORMALIZED DOSE (MREM)

(1/192)

(1/192) 1L PEACH BOTTOM UNIT 3 INTAKE 1 1100 FEET NE (M) The Mean Values are calculated using the positive values. (F) Fraction of detectable measurement are indicated in parentheses.

A-4

APPENDIX B SAMPLE DESIGNATION AND LOCATIONS B-1

Intentionally left blank

TABLE B-1 Radiological Environmental Monitoring Program - Sampling Locations, Distance and Direction from Reactor Buildings, Peach Bottom Atomic Power Station, 2021 Location Location Description Distance & Direction From Site A. Surface Water 1LL Peach Bottom Units 2 and 3 Intake - Composite (Control) 1,200 feet ENE 1MM Peach Bottom Canal Discharge -Composite 5,500 feet SE B. Drinking (Potable) Water 4L Conowingo Dam EL 33' MSL - Composite 45,900 feet SE 6I Holtwood Dam Hydroelectric Station - Composite (Control) 30,500 feet NW 13B Chester Water Authority (CWA) Susquehanna Pumping Station-Composite 13,300 feet ESE C. Fish 4

Conowingo Pond 6,000 - 10,000 feet SE 6

Holtwood Pond (Control) 50,000 - 70,000 feet NNW D. Sediment 4J Conowingo Pond near Berkins Run 7,400 feet SE 4T Conowingo Pond near Conowingo Dam 41,800 feet SE 6F Holtwood Dam (Control) 31,500 feet NW E. Air Particulate - Air Iodine 1B Weather Station #2 2,500 feet NW 1Z Weather Station #1 1,500 feet SE 1A Weather Station #1 1,500 feet SE 1C Peach Bottom South Sub Station 4,700 feet SSE 3A Delta, PA - Substation 19,300 feet SW 5H2 Manor Substation (Control) 162,400 feet NE F. Milk - bi-weekly / monthly J

5,100 feet W R

4,900 feet SW S

19,100 feet SE V

(Control) 32,600 feet W X

9,500 feet NW G. Milk - quarterly C

(Control) 50,400 feet NW D

18,500 feet NE E

(Control) 46,100 feet N P

11,000 feet ENE W

89,200 feet S Y

10,500 feet NE H. Food Products 1C 4,700 feet SSE 2Q 9,200 feet SW 3Q 9,500 feet W 55 (Control) 51,900 feet NE B-2

TABLE B-1 Radiological Environmental Monitoring Program - Sampling Locations, Distance and Direction from Reactor Buildings, Peach Bottom Atomic Power Station, 2021 Location Location Description Distance & Direction From Site J. Environmental Dosimetry - OSLD Site Boundary 1A Weather Station #1 1,500 feet SE 1B Weather Station #2 2,500 feet NW 1C Peach Bottom South Substation 4,700 feet SSE 1D 140 o Sector 3,500 feet SSE 1E Peach Bottom 350o Sector Hill 3,000 feet NNW 1F Peach Bottom 200o Sector Hill 2,900 feet SSW 1G Peach Bottom North Substation 3,100 feet WNW 1H Peach Bottom 270o Sector Hill 3,200 feet W 1I Peach Bottom South Substation 2,900 feet S 1J Peach Bottom 180o Sector Hill 4,000 feet S 1K Peach Bottom Site Area 4,700 feet SW 1L Peach Bottom Unit 3 Intake 1,100 feet NE 1M Discharge 5,400 feet SE 1NN Peach Bottom Site 2,700 feet WSW 1P Tower B & C Fence 2,200 feet ESE 1Q Tower D & E Fence 3,300 feet SE 1R Transmission Line Hill/ISFSI Pad 2,800 feet SSE 2

Peach Bottom 130o Sector Hill 4,700 feet SE 2B*

Burk Property 3,900 feet SSE 40 Peach Bottom Site Area 8,000 feet SW Intermediate Distance 1T*

Lay Road/LLRWSF 3,100 feet WNW 3A Delta, PA Substation 19,300 feet SW 4K Conowingo Dam Power House Roof 45,900 feet SE 5

Wakefield, PA 24,400 feet E 6B Holtwood Dam Power House Roof 30,400 feet NW 14 Peters Creek 10,300 feet E 15 Silver Spring Rd 19,300 feet N 17 Riverview Rd 21,500 feet ESE 22 Eagle Road 12,500 feet NNE 23 Peach Bottom 150o Sector Hill 5,500 feet SSE 26 Slab Road 21,800 feet NW 27 N. Cooper Road 14,400 feet S 31A Eckman Rd 24,100 feet SE 32 Slate Hill Rd 14,400 feet ENE 42 Muddy Run Environ. Laboratory 21,600 feet NNW 43 Drumore Township School 26,200 feet NNE 44 Goshen Mill Rd 26,700 feet NE 45 PB-Keeney Line 18,500 feet ENE 46 Broad Creek 23,800 feet SSE 47 Broad Creek Scout Camp 22,700 feet S 48 Macton Substation 26,500 feet SSW 49 PB-Conastone Line 21,500 feet WSW 50 TRANSCO Pumping Station 26,400 feet W 51 Fin Substation 21,000 feet WNW Control 16 Nottingham, PA Substation (Control) 67,100 feet E 18 Fawn Grove, PA (Control) 52,200 feet W 19 Red Lion, PA (Control) 124,000 feet WNW 24 Harrisville, MD Substation (Control) 58,200 feet ESE

  • Nearest Residents B-3

TABLE B-2 Radiological Environmental Monitoring Program - Summary of Sample Collection and Analytical Methods, Peach Bottom Atomic Power Station, 2021 Sample Medium Analysis Sampling Method Collection Procedure Number Sample Size Analytical Procedure Number Surface Water Gamma Spectroscopy Monthly composite from a continuous water compositor CY-ES-240 Surface, Drinking, and Effluent Water Sample Collection for Radiological Analysis ST-C-095-835-2 Circulating Water Intake and Discharge Composite Sampling 2 gallon TBE, TBE-2007 Gamma-Emitting Radioisotope Analysis EIS, CY-ES-205 Gamma Counting Using the HPGe Detector with the Genie PC Counting System Surface Water Tritium Quarterly composite from a continuous water compositor CY-ES-240 Surface, Drinking, and Effluent Water Sample Collection for Radiological Analysis ST-C-095-835-2 Circulating Water Intake and Discharge Composite Sampling 500 ml TBE, TBE-2011 Tritium Analysis in Drinking Water by Liquid Scintillation GEL, EPA906.0 Mod, for Tritium analysis by Liquid Scintillation Surface Water I-131 Monthly composite from a continuous water compositor CY-ES-240 Surface, Drinking, and Effluent Water Sample Collection for Radiological Analysis ST-C-095-835-2 Circulating Water Intake and Discharge Composite Sampling 2 gallon TBE, TBE-2012 Radioiodine in Various Matrices EIS, CY-ES-205 Gamma Counting Using the HPGe Detector with the Genie PC Counting System Drinking Water Gross Beta Monthly composite from a continuous water compositor CY-ES-240 Surface, Drinking, and Effluent Water Sample Collection for Radiological Analysis 2 gallon TBE, TBE-2008 Gross Alpha and/or Gross Beta Activity in Various Matrices CY-ES-206, Operation of the Tennelec S5E Proportional Counter Drinking Water I-131 Monthly composite from a continuous water compositor CY-ES-240 Surface, Drinking, and Effluent Water Sample Collection for Radiological Analysis 2 gallon TBE, TBE-2012 Radioiodine in Various Matrices EIS, CY-ES-205 Gamma Counting Using the HPGe Detector with the Genie PC Counting System Drinking Water Gamma Spectroscopy Monthly composite from a continuous water compositor CY-ES-240 Surface, Drinking, and Effluent Water Sample Collection for Radiological Analysis 2 gallon TBE, TBE-2007 Gamma-Emitting Radioisotope Analysis EIS, CY-ES-205 Gamma Counting Using the HPGe Detector with the Genie PC Counting System Drinking Water Tritium Quarterly composite from a continuous water compositor CY-ES-240 Surface, Drinking, and Effluent Water Sample Collection for Radiological Analysis 500 ml TBE, TBE-2011 Tritium Analysis in Drinking Water by Liquid Scintillation GEL, EPA906.0 Mod, for Tritium Analysis by Liquid Scintillation Fish Gamma Spectroscopy Semi-annual samples collected via electroshocking or other techniques NAI-ER3 Collection of fish samples for radiological analysis (PBAPS) 1000 grams (wet)

TBE, TBE-2007 Gamma-Emitting Radioisotope Analysis EIS, CY-ES-205 Gamma Counting Using the HPGe Detector with the Genie PC Counting System B-4

TABLE B-2 Radiological Environmental Monitoring Program - Summary of Sample Collection and Analytical Methods, Peach Bottom Atomic Power Station, 2021 Sample Medium Analysis Sampling Method Collection Procedure Number Sample Size Analytical Procedure Number Sediment Gamma Spectroscopy Semi-annual grab samples NAI-ER3 Collection of sediment samples for radiological analysis (PBAPS) 500 grams (dry)

TBE, TBE-2007 Gamma-Emitting Radioisotope Analysis EIS, CY-ES-205, Gamma Counting Using the HPGe Detector with the Genie PC Counting System Air Particulates Gross Beta One-week composite of continuous air sampling through glass fiber filter paper CY-ES-237 Air Iodine and Air Particulate Sample Collection for Radiological Analysis 1 filter

(~ 280 cubic meters weekly)

TBE, TBE-2008 Gross Alpha and/or Gross Beta Activity in Various Matrices EIS, CY-ES-206, Operation of the Tennelec S5E Proportional Counter Air Particulates Gamma Spectroscopy Quarterly composite of each station TBE, TBE-2023 Compositing of samples CY-ES-204 Sample Preparation for Gamma and Beta Counting 13 filters

(~ 3600 cubic meters)

TBE, TBE-2007 Gamma-Emitting Radioisotope Analysis EIS, CY-ES-205 Gamma Counting Using the HPGe Detector with the Genie PC Counting System Air Iodine Gamma Spectroscopy One-week composite of continuous air sampling through charcoal filter CY-ES-237 Air Iodine and Air Particulate Sample Collection for Radiological Analysis 1 filter

(~ 280 cubic meters weekly)

TBE, TBE-2007 Gamma-Emitting Radioisotope Analysis EIS, CY-ES-205 Gamma Counting Using the HPGe Detector with the Genie PC Counting System Milk I-131 Bi-weekly grab sample when cows are on pasture.

Monthly all other times CY-ES-238 Milk Sample Collection for Radiological Analysis 2 gallon TBE, TBE-2012 Radioiodine in Various Matrices EIS, CY-ES-205 Gamma Counting Using the HPGe Detector with the Genie PC Counting System Milk Gamma Spectroscopy Bi-weekly grab sample when cows are on pasture; Monthly all other times CY-ES-238 Milk Sample Collection for Radiological Analysis 2 gallon TBE, TBE-2007 Gamma-Emitting Radioisotope Analysis EIS, CY-ES-205 Gamma Counting Using the HPGe Detector with the Genie PC Counting System Food Products Gamma Spectroscopy Monthly when available CY-ES-241 Vegetation Sample Collection for Radiological Analysis 1000 grams TBE, TBE-2007 Gamma-Emitting Radioisotope Analysis EIS, CY-ES-205 Gamma Counting Using the HPGe Detector with the Genie PC Counting System OSLD Optically Stimulated Luminescence Dosimetry Quarterly OSLDs comprised of two Al2O3:C Landauer Incorporated elements.

CY-ES-239, Collection/Exchange of Field Dosimeters for Radiological Analysis 2 dosimeters Landauer Incorporated B-5

Figure B-1 Environmental Sampling Locations Within One Mile of Peach Bottom Atomic Power Station, 2021 B-6

Figure B-2 Environmental Sampling Locations Between One and Approximately Five Miles of Peach Bottom Atomic Power Station, 2021 B-7

Figure B-3 Environmental Sampling Locations Greater Than Five Miles from Peach Bottom Atomic Power Station, 2021 B-8

Intentionally left blank

Table C-I.1 COLLECTION PERIOD 12/29/20 - 03/31/21

< 183

< 183 03/31/21 - 06/30/21

< 183

< 189 06/30/21 - 09/29/21

< 185

< 181 09/29/21 - 01/05/22

< 184

< 186 MEAN Table C-I.2 COLLECTION PERIOD 12/29/20 -

01/27/21

< 0.6

< 0.8 01/27/21 -

03/03/21

< 0.9

< 0.9 03/03/21 -

03/31/21

< 0.9

< 0.9 03/31/21 -

04/28/21

< 0.9

< 0.8 04/28/21 -

06/02/21

< 1.0

< 0.9 06/02/21 -

06/30/21

< 0.9

< 0.8 06/30/21 -

07/28/21

< 0.8

< 0.8 07/28/21 -

09/01/21

< 0.9

< 0.7 09/01/21 -

09/29/21

< 0.9

< 0.8 09/29/21 -

11/03/21

< 0.9

< 0.8 11/03/21 -

12/01/21

< 0.8

< 0.8 12/01/21 -

01/05/22

< 0.9

< 0.8 MEAN SAMPLES COLLECTED IN THE VICINITY OF CONCENTRATIONS OF TRITIUM IN SURFACE WATER CONCENTRATIONS OF LOW LEVEL I-131 IN SURFACE WATER RESULTS IN UNITS OF PCI/LITER + 2 SIGMA PEACH BOTTOM ATOMIC POWER STATION, 2021 SAMPLES COLLECTED IN THE VICINITY OF 1MM 1LL 1LL 1MM RESULTS IN UNITS OF PCI/LITER + 2 SIGMA PEACH BOTTOM ATOMIC POWER STATION, 2021 C-1

Table C-I.3 COLLECTION SITE PERIOD Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Cs-137 Ba-140 La-140 1LL 12/29/20 - 01/27/21

< 6

< 7

< 14

< 5

< 14

< 6

< 8

< 7

< 7

< 31

< 10 01/27/21 - 03/03/21

< 7

< 7

< 16

< 8

< 15

< 5

< 14

< 9

< 8

< 30

< 8 03/03/21 - 03/31/21

< 6

< 7

< 12

< 6

< 13

< 6

< 11

< 8

< 5

< 28

< 12 03/31/21 - 04/28/21

< 2

< 2

< 4

< 2

< 4

< 2

< 4

< 2

< 2

< 14

< 4 04/28/21 - 06/02/21

< 5

< 6

< 16

< 6

< 11

< 6

< 14

< 7

< 7

< 30

< 10 06/02/21 - 06/30/21

< 3

< 5

< 8

< 5

< 8

< 5

< 8

< 4

< 5

< 25

< 10 06/30/21 - 07/28/21

< 7

< 7

< 13

< 11

< 17

< 9

< 14

< 9

< 8

< 28

< 10 07/28/21 - 09/01/21

< 5

< 6

< 14

< 5

< 9

< 6

< 11

< 7

< 5

< 26

< 11 09/01/21 - 09/29/21

< 7

< 5

< 13

< 4

< 11

< 8

< 12

< 7

< 5

< 29

< 10 09/29/21 - 11/03/21

< 6

< 6

< 16

< 8

< 10

< 6

< 14

< 5

< 6

< 26

< 10 11/03/21 - 12/01/21

< 5

< 8

< 11

< 6

< 15

< 8

< 10

< 9

< 8

< 26

< 12 12/01/21 - 01/05/22

< 6

< 6

< 16

< 9

< 14

< 7

< 11

< 8

< 8

< 33

< 14 MEAN 1MM 12/29/20 - 01/27/21

< 5

< 6

< 11

< 6

< 12

< 5

< 9

< 6

< 6

< 22

< 10 01/27/21 - 03/03/21

< 6

< 4

< 17

< 7

< 13

< 9

< 15

< 8

< 7

< 33

< 13 03/03/21 - 03/31/21

< 7

< 7

< 15

< 9

< 12

< 6

< 11

< 6

< 6

< 24

< 12 03/31/21 - 04/28/21

< 2

< 2

< 5

< 2

< 4

< 2

< 4

< 2

< 2

< 15

< 5 04/28/21 - 06/02/21

< 6

< 4

< 11

< 5

< 10

< 7

< 10

< 4

< 7

< 32

< 10 06/02/21 - 06/30/21

< 6

< 6

< 13

< 7

< 12

< 6

< 9

< 8

< 6

< 27

< 11 06/30/21 - 07/28/21

< 7

< 6

< 16

< 8

< 17

< 6

< 14

< 6

< 8

< 37

< 14 07/28/21 - 09/01/21

< 8

< 6

< 13

< 6

< 12

< 8

< 11

< 8

< 7

< 31

< 9 09/01/21 - 09/29/21

< 7

< 7

< 14

< 7

< 9

< 6

< 11

< 6

< 7

< 33

< 14 09/29/21 - 11/03/21

< 6

< 7

< 9

< 8

< 15

< 9

< 12

< 7

< 7

< 38

< 10 11/03/21 - 12/01/21

< 6

< 5

< 17

< 6

< 14

< 7

< 10

< 7

< 8

< 34

< 12 12/01/21 - 01/05/22

< 7

< 6

< 14

< 7

< 17

< 7

< 12

< 6

< 7

< 27

< 9 MEAN IN THE VICINITY OF PEACH BOTTOM ATOMIC POWER STATION, 2021 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA CONCENTRATIONS OF GAMMA EMITTERS IN SURFACE WATER SAMPLES COLLECTED C-2

Table C-II.1 CONCENTRATIONS OF GROSS BETA IN DRINKING WATER SAMPLES COLLECTED COLLECTION PERIOD 13B 4L 6I 12/29/20 - 01/28/21 1.8 +/- 1.3

< 1.8

< 1.8 01/28/21 - 03/02/21 2.7 +/- 1.1 2.1 +/- 1.1 1.8 +/- 1.1 03/01/21 - 03/30/21

< 1.9

< 1.8

< 1.8 03/29/21 - 04/27/21

< 2.1

< 1.9

< 1.9 04/27/21 - 06/02/21

< 1.8

< 1.8 2.2 +/- 1.3 06/02/21 - 06/29/21

< 2.3

< 2.3

< 2.3 06/28/21 - 07/26/21

< 2.2 2.3 +/- 1.6

< 2.2 07/27/21 - 08/31/21 2.6 +/- 1.4 2.4 +/- 1.4 2.0 +/- 1.4 08/31/21 - 09/28/21 2.1 +/- 1.3 2.8 +/- 1.2

< 1.7 09/28/21 - 11/02/21 3.7 +/- 1.5 2.0 +/- 1.3 2.1 +/- 1.3 11/01/21 - 11/30/21 2.7 +/- 1.4

< 2.0 3.3 +/- 1.9 11/29/21 - 01/04/22

< 2.0

< 2.0

< 2.0 MEAN +/- 2 STD DEV 2.6 +/- 1.3 2.3 +/- 0.6 2.3 +/- 1.1 Table C-II.2 COLLECTION PERIOD 13B 4L 6I 12/29/20 - 03/30/21

< 184

< 187

< 187 03/30/21 - 06/29/21

< 181

< 184

< 187 06/29/21 - 09/28/21

< 181

< 178

< 184 09/28/21 - 01/04/22

< 174 202 +/- 126

< 180 MEAN 202 +/- 0 Table C-II.3 COLLECTED IN THE VICINITY OF PEACH BOTTOM ATOMIC POWER STATION, 2021 COLLECTION PERIOD 13B 4L 6I 12/29/20 - 01/28/21

< 0.9

< 0.8

< 0.7 01/28/21 - 03/02/21

< 0.9

< 0.8

< 0.8 03/01/21 - 03/30/21

< 0.9

< 0.9

< 0.9 03/29/21 - 04/27/21

< 0.9

< 0.9

< 0.8 04/27/21 - 06/02/21

< 0.9

< 0.9

< 1.0 06/02/21 - 06/29/21

< 0.8

< 0.9

< 0.9 06/28/21 - 07/27/21

< 0.9

< 0.9

< 0.9 07/27/21 - 08/31/21

< 0.8

< 0.9

< 0.6 08/31/21 - 09/28/21

< 0.9

< 0.9

< 0.9 09/28/21 - 11/02/21

< 0.7

< 0.7

< 0.8 11/01/21 - 11/30/21

< 0.7

< 0.8

< 1.0 11/29/21 - 01/04/22

< 0.7

< 0.8

< 0.7 MEAN THE MEAN AND TWO STANDARD DEVIATION ARE CALCULATED USING THE POSITIVE VALUES RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA IN THE VICINITY OF PEACH BOTTOM ATOMIC POWER STATION, 2021 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA CONCENTRATIONS OF TRITIUM IN DRINKING WATER SAMPLES COLLECTED IN THE VICINITY OF PEACH BOTTOM ATOMIC POWER STATION, 2021 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA CONCENTRATIONS OF LOW LEVEL I-131 IN DRINKING WATER SAMPLES C-3

Table C-II.4 COLLECTION SITE PERIOD Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Cs-137 Ba-140 La-140 13B 12/28/20 - 01/25/21

< 5

< 5

< 12

< 6

< 11

< 4

< 10

< 6

< 4

< 21

< 12 01/25/21 - 03/01/21

< 5

< 4

< 12

< 4

< 9

< 5

< 7

< 5

< 5

< 24

< 8 03/01/21 - 03/29/21

< 5

< 6

< 14

< 6

< 10

< 7

< 10

< 7

< 5

< 28

< 9 03/29/21 - 04/26/21

< 3

< 3

< 6

< 3

< 6

< 3

< 5

< 3

< 2

< 19

< 5 04/26/21 - 06/02/21

< 8

< 6

< 18

< 6

< 9

< 8

< 14

< 9

< 8

< 43

< 11 06/02/21 - 06/28/21

< 5

< 7

< 11

< 7

< 12

< 7

< 8

< 7

< 7

< 33

< 7 06/28/21 - 07/26/21

< 6

< 6

< 14

< 5

< 13

< 6

< 11

< 8

< 6

< 33

< 13 07/26/21 - 08/30/21

< 5

< 5

< 10

< 6

< 11

< 6

< 10

< 6

< 5

< 32

< 11 08/30/21 - 09/27/21

< 5

< 6

< 10

< 5

< 11

< 4

< 8

< 5

< 5

< 27

< 7 09/27/21 - 11/01/21

< 6

< 6

< 13

< 6

< 10

< 8

< 11

< 7

< 7

< 32

< 11 11/01/21 - 11/29/21

< 5

< 6

< 15

< 8

< 10

< 6

< 9

< 6

< 6

< 29

< 14 11/29/21 - 01/04/22

< 7

< 5

< 11

< 8

< 8

< 6

< 10

< 7

< 7

< 28

< 10 MEAN 4L 12/29/20 -

01/28/21

< 6

< 5

< 11

< 6

< 11

< 7

< 10

< 6

< 7

< 24

< 10 01/28/21 -

03/02/21

< 4

< 5

< 8

< 7

< 13

< 5

< 12

< 7

< 5

< 26

< 10 03/02/21 -

03/30/21

< 8

< 7

< 17

< 8

< 14

< 7

< 10

< 9

< 8

< 32

< 11 03/30/21 -

04/27/21

< 3

< 3

< 7

< 3

< 6

< 3

< 6

< 3

< 3

< 19

< 6 04/27/21 -

06/02/21

< 7

< 7

< 12

< 6

< 14

< 8

< 11

< 6

< 6

< 26

< 14 06/02/21 -

06/29/21

< 4

< 6

< 17

< 5

< 13

< 7

< 12

< 6

< 7

< 31

< 12 06/29/21 -

07/27/21

< 6

< 7

< 11

< 6

< 12

< 8

< 11

< 7

< 7

< 31

< 14 07/27/21 -

08/31/21

< 5

< 6

< 12

< 8

< 13

< 6

< 10

< 5

< 7

< 25

< 9 08/31/21 -

09/28/21

< 6

< 7

< 12

< 8

< 7

< 8

< 9

< 7

< 5

< 34

< 13 09/28/21 -

11/03/21

< 6

< 7

< 15

< 7

< 15

< 8

< 12

< 8

< 6

< 41

< 12 11/03/21 -

11/30/21

< 7

< 7

< 15

< 6

< 16

< 6

< 12

< 8

< 8

< 32

< 11 11/30/21 -

01/04/22

< 6

< 6

< 11

< 6

< 11

< 6

< 11

< 5

< 7

< 33

< 6 MEAN 6I 12/29/20 - 01/28/21

< 6

< 6

< 15

< 4

< 11

< 7

< 11

< 8

< 8

< 28

< 15 01/28/21 - 03/02/21

< 7

< 6

< 11

< 7

< 10

< 6

< 11

< 5

< 6

< 28

< 8 03/02/21 - 03/30/21

< 6

< 5

< 13

< 5

< 9

< 6

< 11

< 7

< 7

< 33

< 11 03/30/21 - 04/27/21

< 3

< 4

< 7

< 4

< 6

< 3

< 6

< 4

< 3

< 23

< 7 04/27/21 - 06/02/21

< 8

< 7

< 16

< 8

< 16

< 8

< 13

< 8

< 9

< 35

< 11 06/02/21 - 06/29/21

< 6

< 6

< 13

< 8

< 11

< 6

< 11

< 6

< 6

< 27

< 11 06/29/21 - 07/27/21

< 6

< 7

< 14

< 3

< 10

< 7

< 12

< 7

< 7

< 40

< 11 07/27/21 - 08/31/21

< 6

< 5

< 13

< 7

< 13

< 6

< 9

< 6

< 5

< 27

< 10 08/31/21 - 09/28/21

< 7

< 6

< 13

< 7

< 11

< 6

< 11

< 6

< 5

< 31

< 8 09/28/21 - 11/02/21

< 5

< 5

< 9

< 4

< 9

< 5

< 6

< 5

< 4

< 25

< 9 11/02/21 - 11/30/21

< 6

< 8

< 19

< 9

< 12

< 7

< 13

< 6

< 7

< 42

< 11 11/30/21 - 01/04/22

< 6

< 5

< 15

< 5

< 12

< 6

< 9

< 7

< 4

< 29

< 11 MEAN CONCENTRATIONS OF GAMMA EMITTERS IN DRINKING WATER SAMPLES COLLECTED IN THE VICINITY OF PEACH BOTTOM ATOMIC POWER STATION, 2021 RESULTS IN UNITS OF PCI/LITER + 2 SIGMA C-4

Table C-III.1 COLLECTION SITE PERIOD K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Cs-134 Cs-137 4

06/07/21 4250 +/- 1042

< 55

< 57

< 126

< 63

< 161

< 69

< 62 PREDATOR 10/13/21 2914 +/- 1005

< 61

< 50

< 135

< 65

< 135

< 81

< 57 MEAN +/- 2 STD DEV 3582 +/- 1889 4

06/07/21 3574 +/- 958

< 68

< 59

< 123

< 54

< 125

< 68

< 56 BOTTOM FEEDER 10/13/21 2166 +/- 794

< 39

< 47

< 94

< 68

< 119

< 61

< 57 MEAN +/- 2 STD DEV 2870 +/- 1991 6

06/10/21 3036 +/- 1145

< 77

< 55

< 143

< 88

< 159

< 85

< 64 PREDATOR 10/19/21 2773 +/- 1022

< 66

< 76

< 143

< 78

< 144

< 85

< 76 MEAN +/- 2 STD DEV 2905 +/- 372 6

06/10/21 2911 +/- 995

< 75

< 68

< 175

< 81

< 144

< 72

< 79 BOTTOM FEEDER 10/19/21 3104 +/- 1007

< 59

< 58

< 142

< 68

< 112

< 59

< 62 MEAN +/- 2 STD DEV 3008 +/- 273 THE MEAN AND TWO STANDARD DEVIATION ARE CALCULATED USING THE POSITIVE VALUES CONCENTRATIONS OF GAMMA EMITTERS IN PREDATOR AND BOTTOM FEEDER (FISH)

SAMPLES COLLECTED IN THE VICINITY OF PEACH BOTTOM ATOMIC POWER STATION, 2021 RESULTS IN UNITS OF PCI/KG WET +/- 2 SIGMA C-5

Table C-IV.1 COLLECTION SITE PERIOD K-40 Mn-54 Co-58 Co-60 Cs-134 Cs-137 4J 06/22/21 12050 +/- 1389

< 58

< 51

< 65

< 58

< 55 12/10/21 11310 +/- 1404

< 66

< 65

< 49

< 77

< 59 MEAN +/- 2 STD DEV 11680 +/- 1047 4T 06/22/21 17790 +/- 1914

< 86

< 68

< 89

< 114

< 107 12/10/21 23170 +/- 1675

< 72

< 59

< 81

< 87

< 90 MEAN +/- 2 STD DEV 20480 +/- 7608 6F 06/22/21 13610 +/- 1982

< 107

< 98

< 110

< 118

< 129 12/10/21 12970 +/- 1384

< 64

< 66

< 71

< 88

< 85 MEAN +/- 2 STD DEV 13290 +/- 905 THE MEAN AND TWO STANDARD DEVIATION ARE CALCULATED USING THE POSITIVE VALUES CONCENTRATIONS OF GAMMA EMITTERS IN SEDIMENT SAMPLES COLLECTED IN THE VICINITY OF PEACH BOTTOM ATOMIC POWER STATION, 2021 RESULTS IN UNITS OF PCI/KG DRY +/- 2 SIGMA C-6

Table C-V.1 COLLECTION GROUP II GROUP III PERIOD 1B 1C 1Z 3A 5H2 12/28/20 - 01/04/21 15 +/- 4 12/29/20 - 01/06/21 17 +/- 4 15 +/- 4 14 +/- 3 15 +/- 4 01/04/21 - 01/11/21 15 +/- 4 01/06/21 - 01/14/21 20 +/- 4 22 +/- 4 23 +/- 4 21 +/- 4 01/11/21 - 01/19/21 28 +/- 5 01/14/21 - 01/20/21 24 +/- 5 26 +/- 5 26 +/- 5 30 +/- 5 01/19/21 - 01/25/21 12 +/- 4 01/20/21 - 01/28/21 10 +/- 3 9 +/- 3 13 +/- 3 12 +/- 3 01/25/21 - 02/03/21 10 +/- 3 01/28/21 - 02/04/21 8 +/- 3 7 +/- 3 9 +/- 4 10 +/- 4 02/03/21 - 02/08/21 17 +/- 6 02/04/21 - 02/11/21 21 +/- 5 24 +/- 5 24 +/- 5 26 +/- 5 02/08/21 - 02/15/21 21 +/- 4 02/11/21 - 02/17/21 12 +/- 4 13 +/- 4 17 +/- 4 19 +/- 4 02/15/21 - 02/22/21 23 +/- 4 02/17/21 - 02/24/21 21 +/- 4 25 +/- 5 22 +/- 4 27 +/- 5 02/22/21 - 03/02/21 17 +/- 4 02/24/21 - 03/02/21 12 +/- 4 12 +/- 5 14 +/- 5 15 +/- 5 03/02/21 - 03/08/21 17 +/- 4 17 +/- 4 18 +/- 4 19 +/- 4 14 +/- 4 03/08/21 - 03/15/21 17 +/- 4 03/09/21 - 03/16/21 22 +/- 4 21 +/- 4 22 +/- 4 24 +/- 5 03/15/21 - 03/22/21 20 +/- 4 03/16/21 - 03/24/21 18 +/- 4 16 +/- 4 23 +/- 4 23 +/- 4 03/22/21 - 03/30/21 11 +/- 4 03/24/21 - 03/30/21 10 +/- 5 11 +/- 5 13 +/- 5 11 +/- 5 03/30/21 - 04/05/21 23 +/- 5 21 +/- 5 21 +/- 5 22 +/- 5 20 +/- 5 04/05/21 - 04/12/21 13 +/- 4 04/06/21 - 04/13/21 12 +/- 4 10 +/- 4 13 +/- 4 12 +/- 4 04/12/21 - 04/19/21 7 +/- 3 04/13/21 - 04/21/21 12 +/- 3 14 +/- 4 15 +/- 4 16 +/- 4 04/19/21 - 04/26/21 18 +/- 4 04/21/21 - 04/27/21 24 +/- 5 26 +/- 5 29 +/- 5 26 +/- 5 04/26/21 - 05/03/21 19 +/- 4 04/27/21 - 05/04/21 21 +/- 5 19 +/- 5 17 +/- 5 28 +/- 5 05/03/21 - 05/10/21 7 +/- 4 05/04/21 - 05/11/21 13 +/- 4 8 +/- 3 13 +/- 4 11 +/- 4 05/10/21 - 05/17/21 15 +/- 4 05/11/21 - 05/18/21 21 +/- 5 17 +/- 4 23 +/- 5 21 +/- 5 05/17/21 - 05/24/21 21 +/- 5 05/18/21 - 05/26/21 23 +/- 4 17 +/- 4 25 +/- 5 28 +/- 5 05/24/21 - 06/01/21 11 +/- 4 05/26/21 - 06/02/21 9 +/- 4 11 +/- 4 13 +/- 4 15 +/- 4 06/01/21 - 06/07/21 22 +/- 5 06/02/21 - 06/08/21 16 +/- 5 15 +/- 5 22 +/- 5 24 +/- 5 06/07/21 - 06/14/21 12 +/- 4 06/08/21 - 06/15/21 11 +/- 4 16 +/- 4 15 +/- 4 14 +/- 4 06/14/21 - 06/21/21 12 +/- 4 06/15/21 - 06/22/21 19 +/- 5 17 +/- 5 21 +/- 5 20 +/- 5 06/21/21 - 06/28/21 9 +/- 4 06/22/21 - 06/29/21 13 +/- 4 14 +/- 4 12 +/- 3 14 +/- 4 06/28/21 - 07/06/21 10 +/- 3 06/29/21 -

07/07/21 13 +/- 4 15 +/- 4 21 +/- 4 17 +/- 4 07/06/21 -

07/12/21 25 +/- 5 07/07/21 -

07/13/21 15 +/- 4 17 +/- 5 24 +/- 5 24 +/- 5 THE MEAN AND TWO STANDARD DEVIATION ARE CALCULATED USING THE POSITIVE VALUES GROUP I CONCENTRATIONS OF GROSS BETA IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF PEACH BOTTOM ATOMIC POWER STATION, 2021 RESULTS IN UNITS OF E-3 PCI/CUBIC METER +/- 2 SIGMA C-7

Table C-V.1 COLLECTION GROUP II GROUP III PERIOD 1B 1C 1Z 3A 5H2 GROUP I CONCENTRATIONS OF GROSS BETA IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF PEACH BOTTOM ATOMIC POWER STATION, 2021 RESULTS IN UNITS OF E-3 PCI/CUBIC METER +/- 2 SIGMA 07/12/21 -

07/19/21 19 +/- 4 07/13/21 -

07/20/21 22 +/- 5 21 +/- 5 26 +/- 5 29 +/- 5 07/19/21 -

07/26/21 22 +/- 5 07/20/21 -

07/27/21 21 +/- 5 18 +/- 4 24 +/- 5 30 +/- 5 07/26/21 -

08/02/21 18 +/- 5 07/27/21 -

08/03/21 21 +/- 5 15 +/- 4 25 +/- 5 28 +/- 5 08/02/21 -

08/09/21 23 +/- 4 08/03/21 - 08/10/21 20 +/- 4 18 +/- 4 29 +/- 5 28 +/- 5 08/09/21 - 08/16/21 20 +/- 4 08/10/21 - 08/17/21 18 +/- 4 17 +/- 4 25 +/- 5 19 +/- 4 08/16/21 - 08/23/21 12 +/- 4 08/17/21 - 08/24/21 13 +/- 4 12 +/- 4 17 +/- 4 16 +/- 4 08/23/21 - 08/30/21 23 +/- 5 08/24/21 - 08/31/21 27 +/- 5 20 +/- 4 26 +/- 5 24 +/- 4 08/30/21 - 09/07/21 14 +/- 3 08/31/21 - 09/08/21 18 +/- 4 17 +/- 4 44 +/- 20 27 +/- 5 09/07/21 - 09/13/21 24 +/- 5 09/08/21 - 09/15/21 28 +/- 4 23 +/- 4 (1) 39 +/- 5 09/13/21 - 09/20/21 38 +/- 6 09/15/21 - 09/21/21 18 +/- 5 18 +/- 5 (1) 25 +/- 6 09/20/21 - 09/27/21 14 +/- 4 09/21/21 - 09/28/21 17 +/- 4 17 +/- 4 26 +/- 5 22 +/- 5 09/27/21 - 10/04/21 27 +/- 5 09/28/21 - 10/05/21 33 +/- 5 21 +/- 5 26 +/- 5 28 +/- 5 10/04/21 - 10/11/21 10 +/- 4 10/05/21 - 10/12/21 9 +/- 4 7 +/- 3 10 +/- 4 13 +/- 4 10/11/21 - 10/18/21 20 +/- 4 10/12/21 - 10/19/21 18 +/- 4 27 +/- 5 23 +/- 5 25 +/- 5 10/18/21 - 10/25/21 30 +/- 5 10/19/21 - 10/26/21 31 +/- 5 37 +/- 5 27 +/- 5 35 +/- 5 10/25/21 - 11/01/21 21 +/- 4 10/26/21 - 11/02/21 15 +/- 4 18 +/- 4 16 +/- 8 17 +/- 4 11/01/21 - 11/08/21 14 +/- 4 11/02/21 - 11/09/21 25 +/- 5 19 +/- 5 18 +/- 4 20 +/- 5 11/08/21 - 11/15/21 32 +/- 5 11/09/21 - 11/16/21 32 +/- 5 24 +/- 5 22 +/- 5 28 +/- 5 11/15/21 - 11/22/21 22 +/- 4 11/16/21 - 11/23/21 18 +/- 4 22 +/- 5 15 +/- 4 18 +/- 4 11/22/21 - 11/29/21 18 +/- 4 11/23/21 - 11/30/21 21 +/- 5 23 +/- 5 15 +/- 4 24 +/- 5 11/29/21 - 12/06/21 19 +/- 5 11/30/21 - 12/07/21 31 +/- 5 26 +/- 5 20 +/- 4 29 +/- 5 12/06/21 - 12/13/21 32 +/- 5 12/07/21 - 12/14/21 34 +/- 6 30 +/- 6 28 +/- 6 33 +/- 5 12/13/21 - 12/20/21 23 +/- 5 12/14/21 - 12/21/21 22 +/- 5 18 +/- 4 14 +/- 4 24 +/- 5 12/20/21 - 12/28/21 32 +/- 5 12/21/21 - 12/29/21 25 +/- 5 25 +/- 5 18 +/- 5 25 +/- 4 12/28/21 - 01/03/22 21 +/- 5 12/29/21 - 01/04/22 19 +/- 5 21 +/- 5 11 +/- 4 21 +/- 5 MEAN +/- 2 STD DEV 19 +/- 13 18 +/- 12 20 +/- 13 22 +/- 13 19 +/- 14 THE MEAN AND TWO STANDARD DEVIATION ARE CALCULATED USING THE POSITIVE VALUES (1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION C-8

Table C-V.2 COLLECTION SITE PERIOD Be-7 Mn-54 Co-58 Co-60 Cs-134 Cs-137 1B 12/29/20 - 03/30/21 90 +/- 25

< 3

< 3

< 3

< 4

< 3 03/30/21 - 06/29/21 87 +/- 20

< 1

< 1

< 1

< 1

< 1 06/29/21 - 09/28/21 85 +/- 25

< 3

< 3

< 3

< 4

< 3 09/28/21 - 01/04/22 81 +/- 17

< 2

< 2

< 3

< 3

< 3 MEAN +/- 2 STD DEV 78 +/- 12 1C 12/29/20 - 03/30/21 82 +/- 17

< 1

< 2

< 2

< 2

< 2 03/30/21 - 06/29/21 100 +/- 19

< 1

< 1

< 1

< 1

< 2 06/29/21 - 09/28/21 63 +/- 18

< 2

< 2

< 4

< 2

< 3 09/28/21 - 01/04/22 73 +/- 26

< 3

< 3

< 2

< 3

< 3 MEAN +/- 2 STD DEV 80 +/- 32 1Z 12/29/20 - 03/30/21 77 +/- 20

< 2

< 2

< 2

< 2

< 2 03/30/21 - 06/29/21 108 +/- 18

< 2

< 1

< 2

< 2

< 1 06/29/21 - 09/28/21 92 +/- 25

< 3

< 3

< 2

< 3

< 3 09/28/21 - 01/04/22 54 +/- 16

< 2

< 2

< 2

< 2

< 1 MEAN +/- 2 STD DEV 83 +/- 46 3A 12/29/20 - 03/30/21 94 +/- 23

< 3

< 3

< 3

< 4

< 3 03/30/21 - 06/29/21 130 +/- 28

< 3

< 3

< 4

< 3

< 3 06/29/21 - 09/28/21 91 +/- 17

< 2

< 2

< 2

< 2

< 2 09/28/21 - 01/04/22 85 +/- 16

< 2

< 2

< 3

< 2

< 2 MEAN +/- 2 STD DEV 100 +/- 40 5H2 12/28/20 - 03/30/21 107 +/- 21

< 2

< 2

< 3

< 2

< 2 03/30/21 - 06/28/21 67 +/- 20

< 1

< 2

< 2

< 2

< 1 06/28/21 - 09/27/21 88 +/- 19

< 2

< 2

< 2

< 2

< 2 09/27/21 - 01/03/22 86 +/- 19

< 2

< 2

< 3

< 3

< 2 MEAN +/- 2 STD DEV 87 +/- 33 THE MEAN AND TWO STANDARD DEVIATION ARE CALCULATED USING THE POSITIVE VALUES CONCENTRATIONS OF GAMMA EMITTERS IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF PEACH BOTTOM ATOMIC POWER STATION, 2021 RESULTS IN UNITS OF E-3 PCI/CUBIC METER +/- 2 SIGMA C-9

Table C-VI.1 COLLECTION PERIOD 1B 1C 1Z 3A 5H2 12/28/20 - 01/04/21

< 41 12/29/20 - 01/06/21

< 52

< 52

< 52

< 52 01/04/21 - 01/11/21

< 17 01/06/21 - 01/14/21

< 45

< 45

< 45

< 45 01/11/21 - 01/19/21

< 10 01/14/21 - 01/20/21

< 33

< 31

< 14

< 31 01/19/21 - 01/25/21

< 24 01/20/21 - 01/28/21

< 39

< 38

< 38

< 38 01/25/21 - 02/03/21

< 24 01/28/21 - 02/04/21

< 28

< 28

< 28

< 28 02/03/21 - 02/08/21

< 15 02/04/21 - 02/11/21

< 35

< 38

< 40

< 39 02/08/21 - 02/15/21

< 42 02/11/21 - 02/17/21

< 33

< 35

< 35

< 35 02/15/21 - 02/22/21

< 11 02/17/21 - 02/24/21

< 34

< 16

< 33

< 33 02/22/21 - 03/02/21

< 28 02/24/21 - 03/02/21

< 26

< 29

< 28

< 13 03/02/21 - 03/08/21

< 30

< 31

< 30

< 14

< 20 03/08/21 - 03/15/21

< 12 03/09/21 - 03/16/21

< 26

< 27

< 27

< 12 03/15/21 - 03/22/21

< 31 03/16/21 - 03/24/21

< 17

< 17

< 17

< 17 03/22/21 - 03/30/21

< 11 03/24/21 - 03/30/21

< 15

< 14

< 14

< 14 03/30/21 - 04/05/21

< 49

< 48

< 20

< 48

< 17 04/05/21 - 04/12/21

< 14 04/06/21 - 04/13/21

< 12

< 25

< 25

< 25 04/12/21 - 04/19/21

< 29 04/13/21 - 04/21/21

< 20

< 24

< 24

< 24 04/19/21 - 04/26/21

< 18 04/21/21 - 04/27/21

< 27

< 26

< 12

< 26 04/26/21 - 05/03/21

< 15 04/27/21 - 05/04/21

< 20

< 19

< 19

< 20 05/03/21 - 05/10/21

< 29 05/04/21 - 05/11/21

< 41

< 40

< 40

< 40 05/10/21 - 05/17/21

< 14 05/11/21 - 05/18/21

< 17

< 28

< 28

< 28 05/17/21 - 05/24/21

< 38 05/18/21 - 05/26/21

< 22

< 22

< 22

< 22 05/24/21 - 06/01/21

< 22 05/26/21 - 06/02/21

< 19

< 46

< 46

< 46 06/01/21 - 06/07/21

< 18 06/02/21 - 06/08/21

< 49

< 48

< 47

< 46 06/07/21 - 06/14/21

< 22 06/08/21 - 06/15/21

< 38

< 32

< 38

< 38 06/14/21 - 06/21/21

< 25 06/15/21 - 06/22/21

< 45

< 47

< 47

< 47 06/21/21 - 06/28/21

< 21 06/22/21 - 06/29/21

< 41

< 39

< 39

< 39 06/28/21 - 07/06/21

< 13 06/29/21 - 07/07/21

< 41 42

< 42

< 42 07/06/21 - 07/12/21

< 16 MEAN RESULTS IN UNITS OF E-3 PCI/CUBIC METER +/- 2 SIGMA GROUP I GROUP II GROUP III CONCENTRATIONS OF I-131 IN AIR IODINE SAMPLES COLLECTED IN THE VICINITY OF PEACH BOTTOM ATOMIC POWER STATION, 2021 C-10

Table C-VI.1 COLLECTION PERIOD 1B 1C 1Z 3A 5H2 RESULTS IN UNITS OF E-3 PCI/CUBIC METER +/- 2 SIGMA GROUP I GROUP II GROUP III CONCENTRATIONS OF I-131 IN AIR IODINE SAMPLES COLLECTED IN THE VICINITY OF PEACH BOTTOM ATOMIC POWER STATION, 2021 07/07/21 - 07/13/21

< 38 37

< 37

< 37 07/12/21 - 07/19/21

< 14 07/13/21 - 07/20/21

< 41

< 17

< 40

< 40 07/19/21 - 07/26/21

< 23 07/20/21 - 07/27/21

< 36

< 36

< 36

< 36 07/26/21 - 08/02/21

< 34 07/27/21 - 08/03/21

< 25 25

< 25

< 25 08/02/21 - 08/09/21

< 14 08/03/21 - 08/10/21

< 27

< 27

< 27

< 27 08/09/21 - 08/16/21

< 32 08/10/21 - 08/17/21

< 19

< 40

< 40

< 40 08/16/21 - 08/23/21

< 21 08/17/21 - 08/24/21

< 45

< 45

< 45

< 45 08/23/21 - 08/30/21

< 32 08/24/21 - 08/31/21

< 26

< 62

< 62

< 62 08/30/21 - 09/07/21

< 11 08/31/21 - 09/08/21

< 34

< 34

< 60

< 34 09/07/21 - 09/13/21

< 46 09/08/21 - 09/15/21

< 17

< 18 (1)

< 18 09/13/21 - 09/20/21

< 19 09/15/21 - 09/21/21

< 14

< 14 (1)

< 15 09/20/21 - 09/27/21

< 28 09/21/21 - 09/28/21

< 23

< 22

< 24

< 22 09/27/21 - 10/04/21

< 17 09/28/21 - 10/05/21

< 55

< 57

< 57

< 57 10/04/21 - 10/11/21

< 28 10/05/21 - 10/12/21

< 58

< 58

< 58

< 58 10/11/21 - 10/18/21

< 17 10/12/21 - 10/19/21

< 41

< 41

< 41

< 41 10/18/21 - 10/25/21

< 34 10/19/21 - 10/26/21

< 44

< 41

< 44

< 40 10/25/21 - 11/01/21

< 14 10/26/21 - 11/02/21

< 27

< 25

< 53

< 25 11/01/21 - 11/08/21

< 22 11/02/21 - 11/09/21

< 22

< 22

< 22

< 22 11/08/21 - 11/15/21

< 17 11/09/21 - 11/16/21

< 44

< 18

< 43

< 43 11/15/21 - 11/22/21

< 21 11/16/21 - 11/23/21

< 61

< 60

< 60

< 60 11/22/21 - 11/29/21

< 17 11/23/21 - 11/30/21

< 11

< 23

< 23

< 23 11/29/21 - 12/06/21

< 21 11/30/21 - 12/07/21

< 23

< 24

< 23

< 23 12/06/21 - 12/13/21

< 12 12/07/21 - 12/14/21

< 57

< 50

< 57

< 19 12/13/21 - 12/20/21

< 22 12/14/21 - 12/21/21

< 48

< 48

< 47

< 48 12/20/21 - 12/28/21

< 13 12/21/21 - 12/29/21

< 18

< 18

< 21

< 16 12/28/21 - 01/03/22

< 15 12/29/21 - 01/04/22

< 22

< 23

< 22

< 23 MEAN (1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION C-11

Table C-VII.1 COLLECTION WEEK C

E V

D J

P R

S W

X Y

01/14/21

< 0.9

< 0.8

< 0.4

< 0.4

< 0.9 02/10/21

< 0.5

< 0.7

< 0.6

< 0.7

< 0.8

< 0.6

< 0.9

< 0.7

< 0.5

< 0.8

< 0.9 03/11/21

< 0.8

< 0.9

< 0.8

< 0.7

< 0.8 04/08/21

< 0.9

< 0.9

< 0.9

< 0.7

< 0.7 04/21/21

< 0.8

< 0.9

< 0.9

< 0.9

< 0.9 05/06/21

< 0.8

< 0.9

< 0.9

< 0.9

< 0.9

< 0.9

< 0.9

< 0.9

< 0.9

< 0.8

< 0.8 05/20/21

< 0.8

< 0.9

< 0.9

< 0.9

< 0.9 06/03/21

< 0.8

< 0.9

< 0.9

< 0.8

< 0.9 06/18/21

< 0.7

< 0.5

< 0.5

< 0.6

< 0.7 07/01/21

< 0.9

< 0.8

< 0.9

< 0.8

< 0.8 07/15/21

< 0.8

< 0.8

< 0.9

< 0.9

< 0.8 07/30/21

< 0.8

< 0.8

< 0.8

< 0.8

< 0.8 08/12/21

< 0.8

< 0.8

< 0.8

< 0.9

< 0.9

< 0.8

< 0.8

< 0.8

< 0.9

< 0.7

< 0.9 08/26/21

< 0.9

< 1.0

< 0.8

< 0.9

< 0.8 09/08/21

< 0.9

< 0.8

< 0.9

< 0.9

< 0.8 09/23/21

< 0.5

< 0.7

< 0.8

< 0.7

< 0.9 10/08/21

< 0.9

< 0.7

< 0.9

< 0.9

< 0.6 10/21/21

< 0.8

< 0.9

< 0.8

< 0.8

< 0.9 11/04/21

< 0.9

< 0.8

< 0.8

< 0.8

< 0.9

< 0.8

< 0.9

< 0.7

< 0.8

< 0.8

< 0.6 11/16/21

< 0.8

< 0.8

< 0.8

< 0.9

< 0.9 12/01/21

< 0.8

< 0.9

< 0.8

< 0.8

< 0.8 MEAN

`

CONCENTRATIONS OF LOW LEVEL I-131 IN MILK SAMPLES COLLECTED IN THE VICINITY OF PEACH BOTTOM ATOMIC POWER STATION, 2021 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA INDICATOR FARMS CONTROL FARMS C-12

Table C-VII.2 COLLECTION SITE PERIOD K-40 Cs-134 Cs-137 Ba-140 La-140 C

02/09/21 1192 +/- 187

< 9

< 10

< 41

< 11 05/06/21 1280 +/- 164

< 7

< 7

< 36

< 9 08/11/21 1319 +/- 160

< 8

< 7

< 29

< 9 11/04/21 1246 +/- 188

< 9

< 6

< 21

< 6 MEAN +/- 2 STD DEV 1259 +/- 108 E

02/10/21 1184 +/- 206

< 10

< 6

< 31

< 14 05/06/21 1262 +/- 190

< 10

< 9

< 44

< 4 08/11/21 1398 +/- 204

< 11

< 9

< 33

< 10 11/03/21 1206 +/- 172

< 9

< 9

< 31

< 9 MEAN +/- 2 STD DEV 1262 +/- 233 V

01/14/21 1323 +/- 138

< 7

< 5

< 25

< 8 02/10/21 1121 +/- 171

< 6

< 8

< 28

< 11 03/11/21 1246 +/- 188

< 9

< 10

< 25

< 15 04/08/21 1087 +/- 199

< 9

< 7

< 35

< 13 04/21/21 1139 +/- 189

< 10

< 8

< 26

< 14 05/05/21 1160 +/- 160

< 9

< 7

< 29

< 11 05/20/21 1172 +/- 187

< 8

< 7

< 28

< 9 06/03/21 1309 +/- 181

< 10

< 7

< 43

< 13 06/17/21 1382 +/- 173

< 7

< 7

< 22

< 7 07/01/21 1344 +/- 185

< 8

< 7

< 36

< 7 07/15/21 1435 +/- 187

< 8

< 6

< 28

< 9 07/29/21 1276 +/- 195

< 9

< 8

< 35

< 9 08/11/21 1361 +/- 190

< 10

< 10

< 41

< 14 08/26/21 1237 +/- 187

< 9

< 8

< 41

< 10 09/08/21 1282 +/- 139

< 7

< 6

< 23

< 9 09/23/21 1242 +/- 145

< 4

< 5

< 20

< 8 10/07/21 1163 +/- 179

< 9

< 9

< 29

< 8 10/21/21 1131 +/- 172

< 8

< 8

< 38

< 11 11/04/21 1136 +/- 178

< 7

< 7

< 35

< 5 11/16/21 1274 +/- 139

< 6

< 6

< 29

< 9 12/01/21 1391 +/- 211

< 13

< 11

< 47

< 12 MEAN +/- 2 STD DEV 1248 +/- 204 D

02/09/21 1356 +/- 190

< 7

< 8

< 30

< 7 05/05/21 1279 +/- 200

< 10

< 8

< 33

< 9 08/11/21 1279 +/- 176

< 10

< 9

< 39

< 10 11/03/21 1287 +/- 175

< 8

< 7

< 29

< 10 MEAN +/- 2 STD DEV 1300 +/- 75 CONCENTRATIONS OF GAMMA EMITTERS IN MILK SAMPLES COLLECTED IN THE VICINITY OF PEACH BOTTOM ATOMIC POWER STATION, 2021 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA C-13

Table C-VII.2 COLLECTION SITE PERIOD K-40 Cs-134 Cs-137 Ba-140 La-140 CONCENTRATIONS OF GAMMA EMITTERS IN MILK SAMPLES COLLECTED IN THE VICINITY OF PEACH BOTTOM ATOMIC POWER STATION, 2021 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA J

01/14/21 1384 +/- 154

< 7

< 6

< 24

< 8 02/10/21 1261 +/- 116

< 5

< 5

< 20

< 7 03/11/21 1292 +/- 183

< 9

< 10

< 37

< 9 04/08/21 1296 +/- 184

< 9

< 10

< 38

< 9 04/21/21 1187 +/- 177

< 9

< 8

< 32

< 11 05/05/21 1157 +/- 177

< 8

< 9

< 38

< 9 05/20/21 1109 +/- 171

< 8

< 7

< 33

< 11 06/03/21 1247 +/- 175

< 8

< 10

< 35

< 14 06/18/21 1213 +/- 165

< 8

< 8

< 33

< 13 07/01/21 1234 +/- 148

< 9

< 7

< 34

< 10 07/15/21 1197 +/- 173

< 9

< 8

< 26

< 9 07/30/21 1871 +/- 218

< 10

< 8

< 37

< 10 08/11/21 1257 +/- 182

< 9

< 8

< 21

< 10 08/26/21 1336 +/- 179

< 9

< 9

< 32

< 10 09/08/21 1380 +/- 159

< 8

< 6

< 24

< 8 09/23/21 1312 +/- 191

< 9

< 6

< 28

< 8 10/08/21 1222 +/- 175

< 8

< 8

< 33

< 10 10/21/21 1322 +/- 184

< 7

< 7

< 37

< 11 11/03/21 1248 +/- 158

< 7

< 7

< 29

< 8 11/16/21 1002 +/- 165

< 7

< 8

< 31

< 10 12/01/21 1258 +/- 180

< 10

< 9

< 34

< 12 MEAN +/- 2 STD DEV 1275 +/- 325 P

02/09/21 1280 +/- 187

< 10

< 6

< 38

< 11 05/05/21 990 +/- 179

< 7

< 10

< 31

< 14 08/11/21 1179 +/- 144

< 6

< 8

< 30

< 9 11/03/21 1098 +/- 141

< 9

< 8

< 34

< 10 MEAN +/- 2 STD DEV 1137 +/- 246 R

01/14/21 982 +/- 122

< 7

< 5

< 27

< 8 02/09/21 1239 +/- 143

< 7

< 7

< 21

< 8 03/11/21 1413 +/- 174

< 7

< 8

< 27

< 10 04/08/21 1236 +/- 177

< 7

< 6

< 23

< 10 04/21/21 1172 +/- 151

< 7

< 7

< 26

< 7 05/05/21 1273 +/- 180

< 9

< 10

< 47

< 11 05/20/21 1184 +/- 161

< 7

< 6

< 28

< 10 06/03/21 1301 +/- 195

< 9

< 10

< 41

< 6 06/17/21 1271 +/- 146

< 7

< 7

< 30

< 8 07/01/21 1212 +/- 200

< 10

< 7

< 34

< 10 07/15/21 1062 +/- 173

< 9

< 9

< 34

< 12 07/29/21 1343 +/- 152

< 6

< 7

< 32

< 9 08/12/21 1391 +/- 188

< 7

< 8

< 31

< 8 08/26/21 1178 +/- 176

< 9

< 10

< 36

< 11 09/08/21 1262 +/- 152

< 5

< 6

< 26

< 6 09/23/21 1344 +/- 175

< 7

< 6

< 26

< 9 10/07/21 1188 +/- 190

< 11

< 9

< 32

< 11 10/21/21 973 +/- 183

< 8

< 9

< 35

< 7 11/03/21 1282 +/- 177

< 7

< 7

< 35

< 10 11/16/21 1435 +/- 180

< 7

< 7

< 34

< 12 12/01/21 1268 +/- 181

< 9

< 7

< 33

< 8 MEAN +/- 2 STD DEV 1239 +/- 247 C-14

Table C-VII.2 COLLECTION SITE PERIOD K-40 Cs-134 Cs-137 Ba-140 La-140 CONCENTRATIONS OF GAMMA EMITTERS IN MILK SAMPLES COLLECTED IN THE VICINITY OF PEACH BOTTOM ATOMIC POWER STATION, 2021 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA S

01/14/21 1154 +/- 182

< 9

< 8

< 34

< 6 02/09/21 1287 +/- 170

< 7

< 6

< 28

< 10 03/11/21 1165 +/- 204

< 8

< 7

< 27

< 7 04/08/21 1203 +/- 183

< 8

< 8

< 32

< 11 04/21/21 1126 +/- 188

< 9

< 9

< 32

< 12 05/05/21 1191 +/- 184

< 7

< 8

< 32

< 9 05/20/21 1336 +/- 184

< 8

< 8

< 37

< 7 06/03/21 1327 +/- 184

< 10

< 9

< 41

< 6 06/17/21 1339 +/- 168

< 8

< 7

< 35

< 9 07/01/21 1295 +/- 197

< 8

< 6

< 34

< 9 07/15/21 1182 +/- 170

< 8

< 7

< 31

< 10 07/29/21 1116 +/- 172

< 9

< 8

< 34

< 12 08/11/21 1322 +/- 186

< 8

< 9

< 42

< 12 08/26/21 1160 +/- 173

< 9

< 7

< 38

< 10 09/08/21 1194 +/- 131

< 5

< 6

< 20

< 8 09/23/21 1368 +/- 158

< 9

< 7

< 30

< 5 10/07/21 1251 +/- 145

< 7

< 7

< 27

< 8 10/21/21 1305 +/- 192

< 11

< 8

< 34

< 9 11/03/21 1220 +/- 197

< 10

< 7

< 38

< 13 11/16/21 1178 +/- 171

< 9

< 6

< 37

< 9 12/01/21 1348 +/- 164

< 8

< 7

< 25

< 9 MEAN +/- 2 STD DEV 1241 +/- 163 W

02/09/21 1089 +/- 160

< 8

< 7

< 38

< 9 05/05/21 1199 +/- 192

< 10

< 10

< 42

< 11 08/12/21 1268 +/- 183

< 11

< 11

< 44

< 12 11/04/21 1270 +/- 160

< 7

< 7

< 28

< 10 MEAN +/- 2 STD DEV 1207 +/- 170 X

01/14/21 1258 +/- 191

< 9

< 8

< 37

< 14 02/09/21 1343 +/- 188

< 9

< 9

< 48

< 7 03/11/21 1308 +/- 214

< 12

< 7

< 37

< 13 04/08/21 1300 +/- 179

< 8

< 8

< 25

< 11 04/21/21 1455 +/- 159

< 7

< 7

< 28

< 8 05/05/21 1224 +/- 187

< 10

< 8

< 43

< 6 05/20/21 1320 +/- 220

< 8

< 7

< 34

< 10 06/03/21 1213 +/- 177

< 9

< 8

< 37

< 9 06/17/21 1186 +/- 178

< 9

< 7

< 33

< 6 07/01/21 1156 +/- 193

< 10

< 9

< 45

< 10 07/15/21 1220 +/- 156

< 7

< 7

< 29

< 7 07/29/21 1237 +/- 176

< 6

< 7

< 33

< 13 08/11/21 1205 +/- 144

< 5

< 5

< 26

< 8 08/26/21 1101 +/- 190

< 10

< 9

< 40

< 14 09/08/21 1212 +/- 137

< 6

< 6

< 19

< 8 09/23/21 979 +/- 146

< 9

< 8

< 30

< 8 10/07/21 1141 +/- 180

< 9

< 9

< 38

< 9 10/21/21 1145 +/- 149

< 8

< 8

< 29

< 9 11/03/21 1087 +/- 149

< 7

< 7

< 26

< 6 11/16/21 1074 +/- 152

< 8

< 7

< 37

< 14 12/01/21 1073 +/- 159

< 8

< 8

< 34

< 9 MEAN +/- 2 STD DEV 1202 +/- 219 Y

02/09/21 1295 +/- 139

< 5

< 5

< 27

< 8 05/05/21 1337 +/- 182

< 9

< 9

< 37

< 14 08/11/21 1280 +/- 191

< 10

< 10

< 38

< 10 11/03/21 1302 +/- 174

< 9

< 10

< 37

< 9 MEAN +/- 2 STD DEV 1304 +/- 48 C-15

Table C-VIII.1 COLLECTION SITE PERIOD Be-7 K-40 Mn-54 Co-58 Co-60 I-131 Cs-134 Cs-137 1C 06/30/21 Corn Leaves 785 +/- 203 1655 +/- 369

< 22

< 17

< 21

< 21

< 27

< 25 06/30/21 Broccoli Leaves 1463 +/- 243 1142 +/- 367

< 25

< 22

< 14

< 28

< 28

< 27 06/30/21 Collards

< 288 3044 +/- 536

< 28

< 24

< 28

< 28

< 29

< 30 07/15/21 Corn Leaves 1590 +/- 378 2941 +/- 546

< 24

< 22

< 16

< 28

< 34

< 32 07/15/21 Collards

< 318 3390 +/- 519

< 25

< 26

< 23

< 29

< 29

< 29 07/15/21 Swiss Chard 379 +/- 136 4519 +/- 367

< 16

< 15

< 18

< 17

< 18

< 17 08/26/21 Swiss Chard 812 +/- 313 5684 +/- 854

< 30

< 37

< 39

< 38

< 40

< 41 08/26/21 Cabbage

< 268 3533 +/- 614

< 33

< 29

< 29

< 40

< 29

< 30 08/26/21 Broccoli Leaves

< 262 2309 +/- 502

< 22

< 16

< 24

< 24

< 27

< 17 09/22/21 Swiss Chard

< 434 5185 +/- 866

< 38

< 36

< 36

< 52

< 43

< 36 09/22/21 Collards 271 +/- 192 2195 +/- 554

< 26

< 28

< 27

< 39

< 33

< 32 09/22/21 Cabbage

< 313 3582 +/- 733

< 46

< 31

< 37

< 42

< 37

< 37 MEAN +/- 2 STD DEV 883 +/- 1088 3265 +/- 2738 2Q 06/24/21 Broccoli Leaves 485 +/- 199 4519 +/- 585

< 23

< 28

< 27

< 28

< 26

< 27 06/24/21 Collards 431 +/- 159 4734 +/- 530

< 20

< 20

< 26

< 23

< 19

< 20 06/24/21 Cabbage 269 +/- 137 4747 +/- 488

< 16

< 19

< 18

< 23

< 20

< 19 07/15/21 Collards

< 244 3877 +/- 558

< 19

< 22

< 30

< 22

< 28

< 25 07/15/21 Cabbage

< 229 4249 +/- 527

< 21

< 20

< 27

< 24

< 23

< 25 07/15/21 Broccoli Leaves

< 339 3256 +/- 551

< 29

< 31

< 26

< 37

< 32

< 31 08/26/21 Swiss Chard 609 +/- 242 6692 +/- 724

< 28

< 30

< 37

< 45

< 37

< 30 08/26/21 Cabbage

< 263 3691 +/- 582

< 28

< 24

< 29

< 40

< 31

< 31 08/26/21 Broccoli Leaves

< 239 2754 +/- 429

< 22

< 20

< 21

< 27

< 23

< 22 09/22/21 Swiss Chard

< 363 6628 +/- 801

< 32

< 27

< 31

< 40

< 34

< 31 09/22/21 Collards

< 363 3266 +/- 583

< 27

< 25

< 30

< 35

< 36

< 25 09/22/21 Cabbage

< 358 2964 +/- 579

< 27

< 23

< 31

< 41

< 31

< 26 MEAN +/- 2 STD DEV 448 +/- 282 4281 +/- 2591 THE MEAN AND TWO STANDARD DEVIATION ARE CALCULATED USING THE POSITIVE VALUES CONCENTRATIONS OF GAMMA EMITTERS IN FOOD PRODUCT SAMPLES COLLECTED IN THE VICINITY OF PEACH BOTTOM ATOMIC POWER STATION, 2021 RESULTS IN UNITS OF PCI/KG WET +/- 2 SIGMA C-16

Table C-VIII.1 COLLECTION SITE PERIOD Be-7 K-40 Mn-54 Co-58 Co-60 I-131 Cs-134 Cs-137 CONCENTRATIONS OF GAMMA EMITTERS IN FOOD PRODUCT SAMPLES COLLECTED IN THE VICINITY OF PEACH BOTTOM ATOMIC POWER STATION, 2021 RESULTS IN UNITS OF PCI/KG WET +/- 2 SIGMA 3Q 06/24/21 Cabbage

< 254 3009 +/- 571

< 26

< 31

< 18

< 30

< 31

< 33 06/24/21 Swiss Chard 415 +/- 193 7605 +/- 673

< 25

< 25

< 28

< 30

< 27

< 27 06/24/21 Collards

< 249 5403 +/- 751

< 22

< 33

< 30

< 25

< 33

< 31 07/15/21 Collards

< 167 4382 +/- 361

< 18

< 17

< 20

< 19

< 21

< 19 07/15/21 Broccoli Leaves

< 333 3247 +/- 491

< 27

< 25

< 29

< 38

< 34

< 29 07/15/21 Cabbage

< 297 3260 +/- 586

< 24

< 23

< 26

< 29

< 30

< 22 08/26/21 Swiss Chard 1301 +/- 334 6538 +/- 769

< 40

< 26

< 36

< 54

< 41

< 33 08/26/21 Cabbage 1474 +/- 433 4993 +/- 711

< 39

< 42

< 36

< 46

< 48

< 32 08/26/21 Collards 356 +/- 247 3592 +/- 585

< 27

< 21

< 35

< 43

< 29

< 34 09/22/21 Swiss Chard

< 367 6134 +/- 804

< 32

< 31

< 42

< 51

< 37

< 35 09/22/21 Cauliflower Leaves

< 278 5174 +/- 690

< 28

< 30

< 26

< 41

< 32

< 31 09/22/21 Corn Leaves 4611 +/- 495 6271 +/- 709

< 33

< 33

< 37

< 45

< 26

< 28 MEAN +/- 2 STD DEV 1631 +/- 3481 4967 +/- 2995 55 06/24/21 Cabbage

< 295 4051 +/- 609

< 36

< 20

< 29

< 37

< 40

< 32 06/24/21 Collards 389 +/- 159 3616 +/- 468

< 18

< 23

< 22

< 23

< 21

< 21 06/24/21 Swiss Chard 510 +/- 275 7080 +/- 839

< 27

< 28

< 29

< 38

< 29

< 32 07/15/21 Cabbage 482 +/- 148 4443 +/- 440

< 20

< 11

< 16

< 20

< 18

< 15 07/15/21 Swiss Chard 595 +/- 343 9617 +/- 1076

< 41

< 30

< 39

< 42

< 32

< 32 07/15/21 Collards 373 +/- 196 4823 +/- 724

< 25

< 19

< 19

< 35

< 27

< 27 08/26/21 Swiss Chard 1017 +/- 260 6093 +/- 800

< 33

< 32

< 26

< 49

< 34

< 29 08/26/21 Corn Leaves 3677 +/- 437 6424 +/- 748

< 33

< 31

< 32

< 42

< 33

< 28 08/26/21 Zucchini Leaves 1825 +/- 368 5496 +/- 793

< 28

< 38

< 36

< 42

< 35

< 30 09/22/21 Swiss Chard

< 361 6393 +/- 782

< 33

< 29

< 28

< 49

< 33

< 40 MEAN +/- 2 STD DEV 1108 +/- 2292 5804 +/- 3512 THE MEAN AND TWO STANDARD DEVIATION ARE CALCULATED USING THE POSITIVE VALUES C-17

Table C-IX.1 QUARTERLY DLR RESULTS FOR PEACH BOTTOM ATOMIC POWER STATION, 2021 1

2 3

4 1

2 3

4 P-TLD-14 23.2 28.6 22.8 23.3 24.6 21.8 ND ND ND ND P-TLD-15 23.9 29.3 22.7 25.4 25.3 23.7 ND ND ND ND P-TLD-16 23.4 28.8 20.4 22.9 23.5 21.4 ND ND ND ND P-TLD-17 27.2 32.6 24.8 27.6 30.0 25.9 ND ND ND ND P-TLD-18 23.9 29.3 21.1 25.6 24.3 25.3 ND ND ND ND P-TLD-19 20.8 26.2 19.6 19.4 19.5 18.7 ND ND ND ND P-TLD-1A 23.8 29.2 25.8 27.1 24.6 24.8 ND ND ND ND P-TLD-1B 20.2 25.6 18.4 20.3 21.8 20.1 ND ND ND ND P-TLD-1C 24.1 29.5 24.4 24.7 24.6 24.1 ND ND ND ND P-TLD-1D 23.4 28.8 21.1 21.7 22.7 18.1 ND ND ND ND P-TLD-1E 22.8 28.2 22.3 23.8 22.9 23.2 ND ND ND ND P-TLD-1F 27 32.4 27.2 27.5 28.2 25.8 ND ND ND ND P-TLD-1G 15.9 21.3 13.8 14.6 15.6 14.9 ND ND ND ND P-TLD-1H 23.6 29.0 23.5 22.9 24.6 22.7 ND ND ND ND P-TLD-1I 21.4 26.8 19.6 21.7 21.8 20.9 ND ND ND ND P-TLD-1J 27.3 32.7 28.3 26.3 28.6 27.5 ND ND ND ND P-TLD-1K 26.4 31.8 26.1 25.2 27.2 27.2 ND ND ND ND P-TLD-1L 19.4 24.8 23.9 25.6 23.9 21.6 ND 6.2 ND ND P-TLD-1M 14 19.4 14.7 13.9 14.4 14.4 ND ND ND ND P-TLD-1NN 25.5 30.9 26.0 24.7 29.1 24.8 ND ND ND ND P-TLD-1P 16.1 21.5 16.4 18.2 18.3 17.0 ND ND ND ND P-TLD-1Q 18.7 24.1 18.1 18.8 20.4 18.7 ND ND ND ND P-TLD-1R(*)

32.9 38.3 33.5 34.4 36.5 33.6 ND ND ND ND P-TLD-1T 24.7 30.1 23.1 24.1 25.8 22.3 ND ND ND ND P-TLD-2 23 28.4 23.8 22.6 24.3 24.5 ND ND ND ND P-TLD-22 24.3 29.7 22.6 23.6 25.3 22.0 ND ND ND ND P-TLD-23 24.9 30.3 23.6 25.6 26.7 25.0 ND ND ND ND P-TLD-24 18.1 23.5 16.9 16.8 17.4 15.4 ND ND ND ND P-TLD-26 26 31.4 21.7 24.7 22.7 25.8 ND ND ND ND P-TLD-27 24.7 30.1 22.9 24.4 26.0 24.2 ND ND ND ND P-TLD-2B(**)

22.1 27.5 21.9 22.7 23.8 21.1 ND ND ND ND P-TLD-31A 19.9 25.3 19.5 20.6 21.4 18.5 ND ND ND ND P-TLD-32 25.4 30.8 24.7 25.2 26.6 25.1 ND ND ND ND P-TLD-3A 17.3 22.7 17.1 17.2 17.6 17.2 ND ND ND ND P-TLD-40 27.8 33.2 28.9 28.6 29.4 27.4 ND ND ND ND P-TLD-42 21 26.4 19.3 23.6 22.9 21.1 ND ND ND ND P-TLD-43 26.5 31.9 25.5 26.7 27.4 26.4 ND ND ND ND P-TLD-44 22.8 28.2 21.2 23.3 23.4 20.8 ND ND ND ND P-TLD-45 24.5 29.9 24.4 24.9 23.9 23.5 ND ND ND ND P-TLD-46 21 26.4 21.4 21.4 21.9 22.3 ND ND ND ND P-TLD-47 26 31.4 26.4 27.2 27.2 25.7 ND ND ND ND P-TLD-48 24.3 29.7 23.9 23.9 24.7 22.9 ND ND ND ND P-TLD-49 24 29.4 24.2 24.5 23.1 23 ND ND ND ND P-TLD-4K 15.1 20.5 14.5 15.8 15.8 14.5 ND ND ND ND P-TLD-5 22 27.4 22.1 22.5 23 19.7 ND ND ND ND P-TLD-50 28.1 33.5 27.5 27.1 28.5 26.2 ND ND ND ND P-TLD-51 23.6 29.0 23.6 22.5 26.5 24.9 ND ND ND ND P-TLD-6B 19.8 25.2 20.9 19.1 21.2 19.2 ND ND ND ND (1) Minimum Differential Dose (MDDQ): The smallest amount of facility-related dose above the background dose (quarterly)

(*) 1R is the dosimeter closest to the ISFSI (**) 2B is the closest resident to the plant and ISFSI Monitoring Location Location Quarterly Baseline, BQ (mrem)

BQ +

MDDQ (1)

(mrem) 2020 Normalized Net Dose, MQX (mrem/std. qtr.)

Quarterly Facility Dose, FQ (mrem)

C-18

Table C-IX.2 ANNUAL DLR RESULTS FOR PEACH BOTTOM ATOMIC POWER STATION, 2021 Monitoring Location Annual Baseline, BA (mrem)

BA + MDDA (1)

(mrem)

Normalized Annual Dose, MA (mrem/yr)

Annual Facility Dose, FA P-TLD-14 92.8 108.9 92.5 ND P-TLD-15 95.5 111.6 97.1 ND P-TLD-16 93.7 109.8 88.2 ND P-TLD-17 108.9 125.0 108.3 ND P-TLD-18 95.5 111.6 96.3 ND P-TLD-19 83.2 99.3 77.2 ND P-TLD-1A 95 111.1 102.3 ND P-TLD-1B 80.8 96.9 80.6 ND P-TLD-1C 96.3 112.4 97.8 ND P-TLD-1D 93.8 109.9 83.6 ND P-TLD-1E 91.2 107.3 92.2 ND P-TLD-1F 108 124.1 108.7 ND P-TLD-1G 63.4 79.5 58.9 ND P-TLD-1H 94.4 110.5 93.7 ND P-TLD-1I 85.6 101.7 84.0 ND P-TLD-1J 109 125.1 110.7 ND P-TLD-1K 105.5 121.6 105.7 ND P-TLD-1L 77.6 93.7 95.0 17.4 P-TLD-1M 56.1 72.2 57.4 ND P-TLD-1NN 102.1 118.2 104.6 ND P-TLD-1P 64.6 80.7 69.9 ND P-TLD-1Q 74.9 91.0 76.0 ND P-TLD-1R(*)

131.7 147.8 138.0 ND P-TLD-1T 104.7 120.8 95.3 ND P-TLD-2 92.2 108.3 95.2 ND P-TLD-22 97 113.1 93.5 ND P-TLD-23 99.7 115.8 100.9 ND P-TLD-24 72.3 88.4 66.5 ND P-TLD-26 104.1 120.2 94.9 ND P-TLD-27 98.8 114.9 97.5 ND P-TLD-2B(**)

88.4 104.5 89.5 ND P-TLD-31A 79.6 95.7 80.0 ND P-TLD-32 101.7 117.8 101.6 ND P-TLD-3A 69.3 85.4 69.1 ND P-TLD-40 111.2 127.3 114.3 ND P-TLD-42 84.2 100.3 86.9 ND P-TLD-43 106.1 122.2 106.0 ND P-TLD-44 91.3 107.4 88.7 ND P-TLD-45 98.2 114.3 96.7 ND P-TLD-46 84.2 100.3 87.0 ND P-TLD-47 103.8 119.9 106.5 ND P-TLD-48 97.1 113.2 95.4 ND P-TLD-49 95.8 111.9 94.8 ND P-TLD-4K 60.3 76.4 60.6 ND P-TLD-5 87.8 103.9 87.3 ND P-TLD-50 112.2 128.3 109.3 ND P-TLD-51 94.5 110.6 97.5 ND P-TLD-6B 79.1 95.2 80.4 ND (1) Minimum Differential Dose (MDDA): The smallest amount of facility-related dose above the background dose (annually)

(*) 1R is the dosimeter closest to the ISFSI (**) 2B is the closest resident to the plant and ISFSI C-19

0.0 2.0 4.0 6.0 8.0 10.0 12.0 14.0 16.0 JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC pCi/liter MONTH CONTROL6I INDICATOR4L INDICATOR13B LLDValue InvestigationLevel 10yrAvgReportableActivity 10yrAvgMDC Opendatapointsarepositiveidentificationofgrossbetaactivity FIGUREC1 MONTHLY TOTALGROSSBETACONCENTRATIONSINDRINKINGWATER SAMPLESCOLLECTEDINTHEVICINITYOF PBAPS,2021 C-20

0 20 40 60 80 100 120 140 160 180 200 4Predator 4Predator 4Bottom Feeder 4Bottom Feeder 6Predator 6Predator 6Bottom Feeder 6Bottom Feeder MDC(pCi/kgwet)

Mn54 Co58 Fe59 Co60 Zn65 Cs134 Cs137 LLDforMn54, Co58/60,Cs134 130pCi/kg (wet)

LLDfor Fe59,Zn65 260pCi/kg (wet)

LLDforCs137 150Ci/kg (wet) 15YearHistoricalAverageCs137 50and57pCi/kg(wet)(location4,6)

FIGUREC2 MDCRESULTSFORFISHSAMPLINGCOLLECTED INTHEVICINITYOFPBAPS,2021 C-21

AllvaluesshownareMDC values,notreportableresults 0

20 40 60 80 100 120 140 160 180 200 1H 2H pCi/kg(dry) 20214J(IND.)

20214T(IND.)

20216F(CON.)

LLD 20YearHistoricalAvgIND.

20YearHistoricalAvgCON.

NoReportingLevelforCs137Activity InvestigationLevel=1000pCi/kg(dry)

FIGUREC3 SEMIANNUALCS137CONCENTRATIONSINSEDIMENTSAMPLES COLLECTEDINTHEVICINITYOFPBAPS,2021 C-22

5.0 150.0 1

4 7

10 13 16 19 22 25 28 31 34 37 40 43 46 49 52 E3pCi/cubicmeter WEEKNO.

GROUPI(Indicator)

GROUPII(Indicator)

GROUPIII(Control)

LLD InvestigateLevel 1st10YearsofPBOperation 15YearAverage No Required Reporting Level for Gross Beta Activities FIGUREC4 MEANWEEKLYGROSSBETACONCENTRATIONSINAIR PARTICULATE SAMPLESCOLLECTEDINTHEVICINITYOFPBAPS,2021 C-23

0 2

4 6

8 10 12 14 Jan.

Feb.

Mar.

Apr.

May Jun.

Jul.

Aug.

Sep.

Oct.

Nov.

Dec.

MDCinpCi/L I131ControlLocations I131IndicatorLocations I131LLD Cs134ControlLocations Cs134IndicatorLocations Cs137ControlLocations Cs137IndicatorLocations 15YearAvgCs137MDC Cs134LLD=15pCi/L Cs137LLD=18pCi/L ReportingLevels I131=3pCi/L Cs134=60pCi/L Cs137=70pCi/L FIGUREC5 AVERAGEMONTHLYMDCFORREMPMILK SAMPLES COLLECTEDINTHEVICINITYOFPBAPS,2021 C-24

FIGUREC6 ANNUALNORMALIZEDGAMMARADIATIONRESULTSFROM DOSIMETERSCOLLECTEDINTHEVICINITYOFPBAPS,2021 50 70 90 110 130 150 170 PTLD14 PTLD15 PTLD16 PTLD17 PTLD18 PTLD19 PTLD1A PTLD1B PTLD1C PTLD1D PTLD1E PTLD1F PTLD1G PTLD1H PTLD1I PTLD1J PTLD1K PTLD1L PTLD1M PTLD1NN PTLD1P PTLD1Q PTLD1R PTLD1T PTLD2 PTLD22 PTLD23 PTLD24 PTLD26 PTLD27 PTLD2B PTLD31A PTLD32 PTLD3A PTLD40 PTLD42 PTLD43 PTLD44 PTLD45 PTLD46 PTLD47 PTLD48 PTLD49 PTLD4K PTLD5 PTLD50 PTLD51 PTLD6B mrem/year NormalizedAnnualDose B+MDD AllMA datalessthanBA +MDDA AnnualFacilityDose(FA)isreportedasNonDetectable(ND)

BA +MDDA NormalizedAnnualDose(MA)

C-25

Intentionally left blank

APPENDIX D DATA TABLES AND FIGURES QC LABORATORIES

Intentionally left blank

TABLE D-I.1 COLLECTION PERIOD 4L

  • Lab 12/29/20 - 01/28/21 2.6 +/- 0.8 EIS 01/28/21 - 03/02/21 1.5 +/- 0.8 EIS 03/02/21 - 03/30/21 1.5 +/- 0.7 EIS 03/30/21 - 04/27/21 1.5 +/- 0.7 EIS 04/27/21 - 06/02/21 1.9 +/- 0.8 EIS 06/02/21 - 06/29/21 1.7 +/- 0.8 EIS 06/29/21 - 07/27/21 1.5 +/- 0.8 EIS 07/27/21 - 08/31/21 3.0 +/- 0.8 EIS 08/31/21 - 09/28/21 1.8 +/- 0.8 EIS 09/28/21 - 11/03/21 1.5 +/- 0.7 EIS 11/03/21 - 11/30/21 1.9 +/- 0.8 EIS 11/30/21 - 01/04/22 1.7 +/- 0.8 EIS MEAN +/- 2 STD DEV 1.8 +/- 1.0 TABLE D-I.2 COLLECTION PERIOD 4L Lab 12/29/20 -

03/30/21

< 124 GEL 03/30/21 -

06/29/21

< 116 GEL 06/29/21 -

09/28/21

< 123 GEL 09/28/21 -

01/04/22

< 124 GEL MEAN TABLE D-I.3 COLLECTION PERIOD 4L Lab 12/29/20 - 01/28/21

< 0.8 EIS 01/28/21 - 03/02/21

< 0.8 EIS 03/02/21 - 03/30/21

< 0.8 EIS 03/30/21 - 04/27/21

< 0.6 EIS 04/27/21 - 06/02/21

< 0.5 EIS 06/02/21 - 06/29/21

< 0.9 EIS 06/29/21 - 07/27/21

< 0.6 EIS 07/27/21 - 08/31/21

< 0.8 EIS 08/31/21 - 09/28/21

< 0.6 EIS 09/28/21 - 11/03/21

< 0.8 EIS 11/03/21 - 11/30/21

< 0.8 EIS 11/30/21 - 01/04/22

< 0.6 EIS MEAN

  • All detectable results were less than the required LLD THE MEAN AND TWO STANDARD DEVIATION ARE CALCULATED USING THE POSITIVE VALUES SAMPLES COLLECTED IN THE VICINITY OF PEACH BOTTOM ATOMIC POWER STATION, 2021 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA CONCENTRATIONS OF GROSS BETA IN DRINKING WATER SAMPLES COLLECTED IN THE VICINITY OF PEACH BOTTOM ATOMIC POWER STATION, 2021 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA CONCENTRATIONS OF TRITIUM IN DRINKING WATER SAMPLES COLLECTED IN THE VICINITY OF PEACH BOTTOM ATOMIC POWER STATION, 2021 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA CONCENTRATIONS OF I-131 IN DRINKING WATER D-1

COLLECTION SITE PERIOD Mn-54 Fe-59 Co-58 Co-60 Zn-65 Zr-95 Nb-95 Cs-134 Cs-137 Ba-140 La-140 4L 12/29/20 - 01/28/21

< 7

< 12

< 6

< 6

< 14

< 11

< 5

< 5

< 6

< 27

< 9 01/28/21 - 03/02/21

< 6

< 14

< 5

< 6

< 14

< 10

< 5

< 5

< 5

< 27

< 8 03/02/21 - 03/30/21

< 6

< 11

< 6

< 7

< 15

< 13

< 8

< 6

< 8

< 33

< 13 03/30/21 - 04/27/21

< 7

< 14

< 7

< 5

< 14

< 11

< 7

< 6

< 7

< 31

< 12 04/27/21 - 06/02/21

< 5

< 12

< 5

< 6

< 14

< 8

< 6

< 5

< 6

< 23

< 10 06/02/21 - 06/29/21

< 4

< 8

< 4

< 5

< 10

< 7

< 5

< 4

< 4

< 25

< 8 06/29/21 - 07/27/21

< 5

< 13

< 6

< 5

< 14

< 10

< 6

< 5

< 5

< 28

< 12 07/27/21 - 08/31/21

< 6

< 15

< 5

< 5

< 10

< 9

< 6

< 6

< 6

< 31

< 12 08/31/21 - 09/28/21

< 6

< 15

< 6

< 6

< 13

< 12

< 7

< 5

< 6

< 34

< 13 09/28/21 - 11/03/21

< 6

< 15

< 7

< 7

< 15

< 12

< 9

< 7

< 8

< 28

< 12 11/03/21 - 11/30/21

< 7

< 14

< 8

< 6

< 15

< 12

< 7

< 6

< 7

< 38

< 13 11/30/21 - 01/04/22

< 6

< 14

< 6

< 7

< 16

< 13

< 7

< 6

< 7

< 26

< 12 MEAN TABLE D-I.4 CONCENTRATIONS OF GAMMA EMITTERS IN DRINKING WATER SAMPLES COLLECTED IN THE VICINITY OF PEACH BOTTOM ATOMIC POWER STATION, 2021 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA (Analysis by EIS Laboratory)

D-2

TABLE D-II.1 COLLECTION 1A PERIOD 12/29/20 - 01/06/21 27 +/- 2

< 18 01/06/21 - 01/14/21 40 +/- 3

< 15 01/14/21 - 01/20/21 38 +/- 3

< 29 01/20/21 - 01/28/21 17 +/- 2

< 17 01/28/21 - 02/04/21 15 +/- 2

< 16 02/04/21 - 02/11/21 40 +/- 3

< 22 02/11/21 - 02/17/21 31 +/- 3

< 16 02/17/21 - 02/24/21 40 +/- 3

< 11 02/24/21 - 03/02/21 21 +/- 2

< 26 03/02/21 - 03/09/22 29 +/- 2

< 12 03/09/22 - 03/16/22 37 +/- 3

< 22 03/16/22 - 03/24/22 29 +/- 2

< 26 03/24/22 - 03/30/21 16 +/- 2

< 22 03/30/21 - 04/06/21 32 +/- 3

< 21 04/06/21 - 04/13/21 19 +/- 2

< 16 04/13/21 - 04/21/21 20 +/- 2

< 14 04/21/21 - 04/27/21 34 +/- 3

< 19 04/27/21 - 05/04/21 34 +/- 3

< 16 05/04/21 - 05/11/21 14 +/- 2

< 14 05/11/21 - 05/18/21 28 +/- 3

< 19 05/18/21 - 05/26/21 33 +/- 2

< 14 05/26/21 - 06/02/21 23 +/- 2

< 22 06/02/21 - 06/08/21 27 +/- 3

< 20 06/08/21 - 06/15/21 15 +/- 2

< 32 06/15/21 - 06/22/21 29 +/- 2

< 26 06/22/21 - 06/29/21 15 +/- 2

< 22 06/29/21 - 07/07/21 24 +/- 2

< 18 07/07/21 - 07/13/21 28 +/- 3

< 21 07/13/21 - 07/20/21 32 +/- 2

< 15 07/20/21 - 07/27/21 34 +/- 3

< 18 07/27/21 - 08/03/21 30 +/- 2

< 17 08/03/21 - 08/10/21 33 +/- 3

< 24 08/10/21 - 08/17/21 27 +/- 2

< 16 08/17/21 - 08/24/21 24 +/- 2

< 16 08/24/21 - 08/31/21 40 +/- 3

< 19 08/31/21 - 09/08/21 47 +/- 9

< 10 09/08/21 - 09/15/21 (1)

(1) 09/15/21 - 09/21/21 (1)

(1) 09/21/21 - 09/28/21 30 +/- 3

< 23 09/28/21 - 10/05/21 41 +/- 3

< 13 10/05/21 - 10/12/21 24 +/- 2

< 22 10/12/21 - 10/19/21 36 +/- 3

< 16 10/19/21 - 10/26/21 46 +/- 3

< 13 10/26/21 - 11/02/21 20 +/- 2

< 18 11/02/21 - 11/09/21 33 +/- 3

< 15 11/09/21 - 11/16/21 33 +/- 3

< 17 11/16/21 - 11/23/21 26 +/- 2

< 39 11/23/21 - 11/30/21 27 +/- 2

< 18 11/30/21 - 12/07/21 36 +/- 3

< 26 12/07/21 - 12/14/21 39 +/- 3

< 25 12/14/21 - 12/21/21 36 +/- 3

< 34 12/21/21 - 12/29/21 48 +/- 3

< 13 12/29/21 - 01/04/22 25 +/- 3

< 21 GROSS BETA 1A I-131 CONCENTRATIONS OF GROSS BETA IN AIR PARTICULATE AND I-131 IN AIR IODINE SAMPLES COLLECTED IN THE VICINITY OF PEACH BOTTOM ATOMIC POWER STATION, 2020 (Analysis by EIS Laboratory)

RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMA D-3

TABLE D-II.2 COLLECTED IN THE VICINITY OF PEACH BOTTOM ATOMIC POWER STATION, 2021 COLLECTION SITE PERIOD Be-7 Mn-54 Co-58 Co-60 Cs-134 Cs-137 1A 12/29/20 - 03/30/21 75 +/- 15

< 2

< 2

< 2

< 2

< 2 03/30/21 - 06/29/21 91 +/- 16

< 2

< 2

< 2

< 1

< 2 06/29/21 - 09/28/21 82 +/- 16

< 2

< 2

< 1

< 2

< 2 09/28/21 - 12/29/21 87 +/- 14

< 1

< 1

< 1

< 1

< 1 MEAN +/- 2 STD DEV 84 +/- 14 TABLE D-III.1 COLLECTION SITE PERIOD I-131 K-40 Cs-134 Cs-137 Ba-140 La-140 J

02/10/21

< 0.8 1490 +/- 111

< 4

< 6

< 17

< 5 05/05/21

< 0.7 1470 +/- 140

< 7

< 7

< 33

< 12 08/11/21

< 0.6 1490 +/- 153

< 8

< 9

< 35

< 13 11/03/21

< 0.7 1410 +/- 149

< 8

< 8

< 29

< 8 MEAN +/- 2 STD DEV 1465 +/- 76 S

02/09/21

< 0.6 1430 +/- 107

< 4

< 5

< 18

< 5 05/05/21

< 0.7 1410 +/- 149

< 7

< 9

< 37

< 12 08/11/21

< 0.5 1340 +/- 137

< 6

< 7

< 27

< 10 11/03/21

< 0.8 1410 +/- 142

< 6

< 7

< 21

< 7 MEAN +/- 2 STD DEV 1398 +/- 79 V

02/10/21

< 0.6 1280 +/- 989

< 4

< 5

< 17

< 5 05/05/21

< 0.5 1220 +/- 134

< 6

< 6

< 28

< 8 08/11/21

< 0.6 1330 +/- 136

< 6

< 7

< 27

< 9 11/04/22

< 0.6 1430 +/- 142

< 6

< 7

< 22

< 8 MEAN +/- 2 STD DEV 1315 +/- 178 THE MEAN AND TWO STANDARD DEVIATION ARE CALCULATED USING THE POSITIVE VALUES CONCENTRATIONS OF GAMMA EMITTERS IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF PEACH BOTTOM ATOMIC POWER STATION, 2021 (Analysis by EIS Laboratory)

(Analysis by EIS Laboratory)

RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA CONCENTRATIONS OF I-131 AND GAMMA EMITTERS IN MILK SAMPLES RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMA D-4

TeledyneConfidential;CommerciallySensitiveBusinessData 0.0 2.0 4.0 6.0 8.0 10.0 JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC pCi/liter MONTH PRIMARY LAB QC LAB LLD FIGURED1 COMPARISONOFMONTHLYTOTALGROSSBETACONCENTRATIONS INDRINKINGWATERSAMPLESFROMSTATION4L ANALYZEDBYTHEPRIMARYANDQCLABORATORIES,2021 ReportingLevel15pCi/L D-5

TeledyneConfidential;CommerciallySensitiveBusinessData FIGURED2 COMPARISONOFWEEKLYGROSSBETACONCENTRATIONSFROM COLOCATEDAIRPARTICULATELOCATIONS(1Z/1A)ANALYZEDBY THEPRIMARYANDQCLABORATORIES,2021 0

10 20 30 40 50 60 70 1

4 7

10 13 16 19 22 25 28 31 34 37 40 43 46 49 52 E-3 pCi/cubic meter WEEK NO.

QC LAB PRIMARY LAB LLD InvestigationLevel160pCi/m3 D-6

APPENDIX E ERRATA DATA

Intentionally left blank

There was no errata data for 2021.

Intentionally left blank

APPENDIX F INTER-LABORATORY COMPARISON PROGRAM ACCEPTANCE CRITERIA AND RESULTS

Intentionally left blank

A. Pre-set Acceptance Criteria

1. Analytics Evaluation Criteria Analytics evaluation report provides a ratio of laboratory results and Analytics known value. Since flag values are not assigned by Analytics, TBE-ES evaluates the reported ratios based on internal QC requirements, which are based on the DOE MAPEP criteria.
2. ERA Evaluation Criteria The Environmental Resource Associates evaluation report provides an acceptance range for control and warning limits with associated flag values.

The Environmental Resource Associates acceptance limits are established per the United States Environmental Protection Agency (USEPA), National Environmental Laboratory Accreditation Conference (NELAC), state-specific performance testing program requirements or ERAs standard operating procedure for the Generation of Performance Acceptance Limits, as applicable.

The acceptance limits are either determined by a regression equation specific to each analyte or a fixed percentage limit promulgated under the appropriate regulatory document.

3. DOE Evaluation Criteria MAPEPs evaluation report provides an acceptance range with associated flag values. The MAPEP defines three levels of performance:

Acceptable (flag = A) - result within +/- 20% of the reference value Acceptable with Warning (flag = W) - result falls in the +/- 20% to +/- 30% of the reference value Not Acceptable (flag = N) - bias is greater than 30% of the reference value Note: The Department of Energy (DOE) Mixed Analyte Performance Evaluation Program (MAPEP) samples are created to mimic conditions found at DOE sites which do not resemble typical environmental samples obtained at commercial nuclear power facilities.

4. Laboratory-Specific Criteria Each analytical laboratory has a documentation system in place to address performance evaluation (PE) sample failures in the form of corrective actions.

The TBE Laboratory initiates a Non-Conformance Report (NCR), which details the failure, performs a root cause investigation, and proposes a corrective and/or preventative action.

The EIS Laboratory enters failures into the Corrective Action Program for tracking and to prevent future occurrence.

The GEL Laboratorys system is documented via a Corrective Action Request and Report (CARR).

F-1

B. TBE PE Results and Discussion

1. The ERA MRAD March 2021 Water Fe-55 result was evaluated as Not Acceptable. The reported value for Fe-55 was 579 pCi/L and the known result was 275 pCi/L (acceptance range 162 - 400). When reviewing the original sample data, it was found that the carrier yield was 52.6% (lower than typical water samples). Looking at the etched plate that was counted, it appeared that some loss of sample could have occurred. The sample was logged for reanalysis and used as the workgroup duplicate. The results were acceptable at 197 and 221 respectively. Yields were 97.4% and 105.7% and the plated samples were centered with no apparent loss of sample. The loss of sample during plating resulted in a low yield which produced an artificially high sample result. (NCR 21-01)
2. The MAPEP February 2021 AP Gross Alpha result was evaluated as Not Acceptable. The reported value was 0.371 Bq/sample and the known result was 1.77 Bq/sample (acceptance range 0.53 - 3.01). A similar failure had occurred several years prior due to the filter being placed with the wrong side up on the detector. At that time, a small dot was placed on the top of the filter prior to removal from the package to indicate the correct side for counting. The current sample was still in the detector when the result was received (dot side facing the detector). The sample was recounted with a similar result and was flipped and recounted. The flipped result was 0.661 Bq/sample, within the acceptable range. Because TBE cannot rely on receiving correct packaging from the provider, MAPEP AP cross-checks will be counted on both sides going forward. NOTE: The August sample had the same packaging issue (upside down).

(NCR 21-02)

3. The MAPEP February 2021 soil Ni-63 was evaluated as Not Acceptable. The reported value was 310 Bq/kg and the known result was 689 (acceptance range 482 - 896). All workgroup QC was reviewed with no anomalies. The analytical procedure had been revised prior to this analysis to eliminate added interferences. The sample yield was >100%, indicative of incomplete separation from interferences, leading to a lower result. The procedure was again revised after acceptable results were obtained. (NCR 21-03)
4. The ERA October 2021 water Gross Beta result was evaluated as Not Acceptable. The reported value was 63.0 pCi/L and the known was 55.7 (acceptance range 38.1 - 62.6) or 113% of the known. The 2-sigma error was 6.8, placing the reported result well within the acceptable range. All QA was reviewed with no anomalies. A follow-up Quick Response cross-check was analyzed with a 120% ratio (see item 7). (NCR 21-10)
5. The ERA October 2021 water Tritium result was evaluated as Not Acceptable.

The reported value was 13,800 pCi/L and the known was 17,200 (acceptance range 15,000 - 18,900). The 2-sigma error was 1,430, placing the result within the acceptable range. TBEs internal QC acceptance is 70% - 130%, while ERAs for this sample was 87% - 110%. All QA was reviewed with no F-2

anomalies. A Quick Response follow-up cross-check was analyzed with a result of 17,500 pCi/L (known 17,800 pCi/L). (NCR 21-11)

6. The MAPEP August 2021 soil Ni-63 result was evaluated as Not Acceptable.

The reported value was 546 Bq/kg and the known result was 1,280 Bq/kg (acceptance range 896 - 1,664). All QC was reviewed and no anomalies found.

The procedure revision to remove added MAPAP interferences was ineffective for this sample. No client soil matrix samples were analyzed for Ni-63 in 2020 or 2021. The root cause investigation is still ongoing at this time. (NCR 21-13)

7. The ERA December 2021 Quick Response water Gross Beta result was evaluated as Not Acceptable. The reported value was 47.6 pCi/L and the known was 39.8 pCi/L or 120% of the known (acceptance range of 26.4 - 47.3).

The 2-sigma error was 6.1, placing the reported result well within the acceptable range. All QA was reviewed with no anomalies. The original sample was recounted on a different detector with a result of 40.3 +/- 6.27 pCi/L.

The failure of this sample and the RAD-127 was due to the narrow upper acceptance ranges assigned (119% and 112%) (NCR 21-14)

C. EIS Laboratory PE Results and Discussion There were no failures for analyses performed for Peach Bottom Atomic Power Station in 2021.

D. GEL Labs PE Results and Discussion There were no failures for analyses performed for Peach Bottom Atomic Power Station in 2021.

F-3

Month/Year Identification Number Matrix Nuclide Units TBE Reported Value Known Value (a)

Ratio of TBE to Analytics Result Evaluation (b)

March 2021 E13466 Milk Sr-89 pCi/L 84.6 87.1 0.97 A

Sr-90 pCi/L 11.5 12.6 0.91 A

E13467 Milk Ce-141 pCi/L 111 125 0.89 A

Co-58 pCi/L 123 128 0.96 A

Co-60 pCi/L 140 154 0.91 A

Cr-51 pCi/L 252 242 1.04 A

Cs-134 pCi/L 130 151 0.86 A

Cs-137 pCi/L 110 110 1.00 A

Fe-59 pCi/L 105 109 0.96 A

I-131 pCi/L 77.6 86.9 0.89 A

Mn-54 pCi/L 111 112 0.99 A

Zn-65 pCi/L 200 211 0.95 A

E13468 Charcoal I-131 pCi 83.5 88.5 0.94 A

E13469 AP Ce-141 pCi 103.0 103 1.00 A

Co-58 pCi 93.3 105 0.89 A

Co-60 pCi 136 126 1.08 A

Cr-51 pCi 213 198 1.07 A

Cs-134 pCi 123.0 124 0.99 A

Cs-137 pCi 86.3 90.1 0.96 A

Fe-59 pCi 81.3 89.6 0.91 A

Mn-54 pCi 93.5 92.0 1.02 A

Zn-65 pCi 166 173 0.96 A

E13470 Soil Ce-141 pCi/g 0.232 0.262 0.89 A

Co-58 pCi/g 0.251 0.268 0.94 A

Co-60 pCi/g 0.306 0.322 0.95 A

Cr-51 pCi/g 0.517 0.506 1.02 A

Cs-134 pCi/g 0.263 0.317 0.83 A

Cs-137 pCi/g 0.278 0.301 0.92 A

Fe-59 pCi/g 0.228 0.229 1.00 A

Mn-54 pCi/g 0.221 0.235 0.94 A

Zn-65 pCi/g 0.448 0.441 1.02 A

E13471 AP Sr-89 pCi 92.2 95.5 0.97 A

Sr-90 pCi 11.7 13.9 0.84 A

(a) The Analytics known value is equal to 100% of the parameter present in the standard as determined by gravimetric and/or volumetric measurements made during standard preparation (b)

Analytics evaluation based on TBE internal QC limits:

A = Acceptable - reported result falls within ratio limits of 0.80-1.20 W = Acceptable with warning - reported result falls within 0.70-0.80 or 1.20-1.30 N = Not Acceptable - reported result falls outside the ratio limits of < 0.70 and > 1.30 Analytics Environmental Radioactivity Cross Check Program Teledyne Brown Engineering Environmental Services (Page 1 of 2)

Table F.1 F-4

Month/Year Identification Number Matrix Nuclide Units TBE Reported Value Known Value (a)

Ratio of TBE to Analytics Result Evaluation (b)

Analytics Environmental Radioactivity Cross Check Program Teledyne Brown Engineering Environmental Services September 2021 E13472 Milk Sr-89 pCi/L 66.4 85.4 0.78 W

Sr-90 pCi/L 11.9 14.0 0.85 A

E13473 Milk Ce-141 pCi/L 118 114 1.03 A

Co-58 pCi/L 116 118 0.98 A

Co-60 pCi/L 142 145 0.98 A

Cr-51 pCi/L 244 236 1.03 A

Cs-134 pCi/L 81 93.1 0.87 A

Cs-137 pCi/L 105 112 0.94 A

Fe-59 pCi/L 105 102 1.03 A

I-131 pCi/L 65.1 85.6 0.76 W

Mn-54 pCi/L 128 128 1.00 A

Zn-65 pCi/L 158 153 1.03 A

E13474 Charcoal I-131 pCi 85.2 90.9 0.94 A

E13475 AP Ce-141 pCi 126 135 0.94 A

Co-58 pCi 148 139 1.07 A

Co-60 pCi 183 171 1.07 A

Cr-51 pCi 322 278 1.16 A

Cs-134 pCi 118 110 1.08 A

Cs-137 pCi 147 132 1.12 A

Fe-59 pCi 131 120 1.09 A

Mn-54 pCi 161 151 1.06 A

Zn-65 pCi 202 180 1.12 A

E13476 Soil Ce-141 pCi/g 0.215 0.219 0.98 A

Co-58 pCi/g 0.208 0.226 0.92 A

Co-60 pCi/g 0.277 0.277 1.00 A

Cr-51 pCi/g 0.388 0.452 0.86 A

Cs-134 pCi/g 0.157 0.178 0.88 A

Cs-137 pCi/g 0.270 0.284 0.95 A

Fe-59 pCi/g 0.218 0.195 1.12 A

Mn-54 pCi/g 0.239 0.246 0.97 A

Zn-65 pCi/g 0.312 0.293 1.06 A

E13477 AP Sr-89 pCi 85.6 68.3 1.25 W

Sr-90 pCi 12.6 11.2 1.13 A

(a) The Analytics known value is equal to 100% of the parameter present in the standard as determined by gravimetric and/or volumetric measurements made during standard preparation (b)

Analytics evaluation based on TBE internal QC limits:

A = Acceptable - reported result falls within ratio limits of 0.80-1.20 W = Acceptable with warning - reported result falls within 0.70-0.80 or 1.20-1.30 N = Not Acceptable - reported result falls outside the ratio limits of < 0.70 and > 1.30 (Page 2 of 2)

Table F.1 F-5

Month/Year Identification Number Matrix Nuclide Units TBE Reported Value Known Value (a)

Acceptance Range Evaluation (b)

February 2021 21-GrF44 AP Gross Alpha Bq/sample 0.371 1.77 0.53 - 3.01 N(3)

Gross Beta Bq/sample 0.731 0.65 0.325 - 0.974 A

21-MaS44 Soil Ni-63 Bq/kg 310 689.0 482 - 896 N(4)

Tc-99 Bq/kg 457 638 447 - 829 W

21-MaSU44 Urine Cs-134 Bq/L 2.34 2.73 1.91 - 3.55 A

Cs-137 Bq/L 2.54 2.71 1.90 - 3.52 A

Co-57 Bq/L 0.4100 (1)

A Co-60 Bq/L 2.24 2.44 1.71 - 3.17 A

Mn-54 Bq/L 2.03 2.03 1.42 - 2.64 A

K-40 Bq/L 52.8 54.0 38 - 70 A

U-234 Bq/L 0.108 0.0877 0.0614 - 0.114 W

U-238 Bq/L 0.101 0.091 0.064 - 0.118 A

Zn-65 Bq/L 1.06 1.34 (2)

A 21-MaW44 Water Ni-63 Bq/L 6.7 8.2 5.7 - 10.7 A

Tc-99 Bq/L 3.850 4.01 2.81 - 5.21 A

21-RdV44 Vegetation Cs-134 Bq/sample 3.13 3.60 2.5 - 4.7 A

Cs-137 Bq/sample 4.64 4.69 3.28 - 6.10 A

Co-57 Bq/sample 5.25 5.05 3.54 - 6.57 A

Co-60 Bq/sample 2.86 2.99 2.09 - 3.89 A

Mn-54 Bq/sample 5.02 5.25 3.68 - 6.83 A

Sr-90 Bq/sample 0.631 0.673 0.471 - 0.875 A

Zn-65 Bq/sample

-0.233 (1)

A August 2021 21-GrF45 AP Gross Alpha Bq/sample 0.368 0.960 0.288 - 1.632 A

Gross Beta Bq/sample 0.595 0.553 0.277 - 0.830 A

21-MaS45 Soil Ni-63 Bq/kg 546 1280 896 - 1664 N(5)

Tc-99 Bq/kg 453 777 544 - 1010 N(6) 21-MaSU45 Urine Cs-134 Bq/L 3.10 3.62 2.53 - 4.71 A

Cs-137 Bq/L 0.083 (1)

A Co-57 Bq/L 0.844 0.87 0.606 - 1.125 A

Co-60 Bq/L 0.0535 (1)

A Mn-54 Bq/L 0.459 0.417 (2)

A K-40 Bq/L 48.8 54.0 38 - 70 A

U-234 Bq/L 0.133 0.116 0.081 - 0.151 A

U-238 Bq/L 0.137 0.121 0.085 - 0.157 A

Zn-65 Bq/L 0.339 0.420 (2)

A 21-MaW45 Water Ni-63 Bq/L 33.5 39.5 27.7 - 51.4 A

Tc-99 Bq/L 3.5 3.7 2.60 - 4.82 A

21-RdV45 Vegetation Cs-134 Bq/sample 3.42 4.34 3.04 - 5.64 W

Cs-137 Bq/sample 2.14 2.21 1.55 - 2.87 A

Co-57 Bq/sample 4.08 4.66 3.26 - 6.06 A

Co-60 Bq/sample 2.81 3.51 2.46 - 4.56 A

Mn-54 Bq/sample 0.035 (1)

A Sr-90 Bq/sample 1.15 1.320 0.92 - 1.72 A

Zn-65 Bq/sample 2.05 2.43 1.70 - 3.16 A

(a) The MAPEP known value is equal to 100% of the parameter present in the standard as determined by gravimetric and/or volumetric measurements made during standard preparation (b) DOE/MAPEP evaluation:

A = Acceptable - reported result falls within ratio limits of 0.80-1.20 W = Acceptable with warning - reported result falls within 0.70-0.80 or 1.20-1.30 N = Not Acceptable - reported result falls outside the ratio limits of < 0.70 and > 1.30 (1) False positive test (2) Sensitivity evaluation (3) See NCR 21-02 (4) See NCR 21-03 (5) See NCR 21-13 (6) Tc-99 cross-checks done for TBE information only - not required DOE's Mixed Analyte Performance Evaluation Program (MAPEP)

Teledyne Brown Engineering Environmental Services (Page 1 of 1)

Table F.2 F-6

Month/Year Identification Number Matrix Nuclide Units TBE Reported Value Known Value (a)

Acceptance Limits Evaluation (b)

March 2021 MRAD-34 Water Am-241 pCi/L 175 157 108 - 201 A

Fe-55 pCi/L 579 275 162 - 400 N(1)

Pu-238 pCi/L 181 171 103 - 222 A

Pu-239 pCi/L 153 142 87.9 - 175 A

Soil Sr-90 pCi/kg 6570 9190 2860 - 14,300 A

AP Fe-55 pCi/filter 107 121 44.2 - 193 A

U-234 pCi/filter 25.99 25.5 18.9 - 29.9 A

U-238 pCi/filter 24.7 25.3 19.1 - 30.2 A

April 2021 RAD-125 Water Ba-133 pCi/L 92.3 90.5 76.2 - 99.6 A

Cs-134 pCi/L 62.9 70.5 57.5 - 77.6 A

Cs-137 pCi/L 161 168 151 - 187 A

Co-60 pCi/L 22.5 20.9 17.7 - 25.8 A

Zn-65 pCi/L 183 177.0 159 - 208 A

GR-A pCi/L 30.8 30.2 15.4 - 39.4 A

GR-B pCi/L 60.1 67.5 46.8 - 74.2 A

U-Nat pCi/L 36.45 36.9 30.0 - 40.8 A

H-3 pCi/L 13,400 14,600 12,800 - 16,100 A

Sr-89 pCi/L 64.5 63.5 51.4 - 71.5 A

Sr-90 pCi/L 22.8 23.0 16.5 - 27.0 A

I-131 pCi/L 28.2 26.7 22.2 - 31.4 A

September 2021 MRAD-35 Water Am-241 pCi/L 68 63.7 43.7 - 81.5 A

Fe-55 pCi/L 179 246 145 - 358 A

Pu-238 pCi/L 102 114 68.5 - 148 A

Pu-239 pCi/L 32 34.3 21.2 - 42.3 A

Soil Sr-90 pCi/kg 6160 6090 1,900 - 9,490 A

AP Fe-55 pCi/filter 493 548 200 - 874 A

Pu-238 pCi/filter 28 28.5 21.5 - 35.0 A

Pu-239 pCi/filter 21 21.6 16.1 - 26.1 A

U-234 pCi/filter 7.95 7.76 5.75 - 9.09 A

U-238 pCi/filter 8.0 7.69 5.81 - 9.17 A

October 2021 RAD-127 Water Ba-133 pCi/L 82.8 87.5 73.6 - 96.2 A

Cs-134 pCi/L 64.0 70.1 57.1 - 77.1 A

Cs-137 pCi/L 145 156 140 - 174 A

Co-60 pCi/L 83.2 85.9 77.3 - 96.8 A

Zn-65 pCi/L 133 145 130 - 171 A

GR-A pCi/L 76.0 66.7 35.0 - 82.5 A

GR-B pCi/L 63.0 55.7 38.1 - 62.6 N(2)

U-Nat pCi/L 52.88 55.5 45.3 - 61.1 A

H-3 pCi/L 13,800 17,200 15,000 - 18,900 N(3)

Sr-89 pCi/L 54.9 61.0 49.1 - 68.9 A

Sr-90 pCi/L 24.8 29.3 21.3 - 34.0 A

I-131 pCi/L 27.4 26.4 21.9 - 31.1 A

December 2021 QR 120121Y Water GR-B pCi/L 47.6 39.8 26.4 - 47.3 N(4)

H-3 pCi/L 17,500 17,800 15,600 - 19,600 A

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

(b) ERA evaluation:

A = Acceptable - Reported value falls within the Acceptance Limits N = Not Acceptable - Reported value falls outside of the Acceptance Limits (1) See NCR 21-01 (2) See NCR 21-10 (3) See NCR 21-11 (4) See NCR 21-14 ERA Environmental Radioactivity Cross Check Program Teledyne Brown Engineering Environmental Services (Page 1 of 1)

Table F.3 F-7

TABLE F.4 Month/Year Identification Number Matrix Nuclide Units EIS Reported Value Known Value (a)

Ratio of Analytics to EIS Result Evaluation (b)

March 2021 E13390 Milk I-131 pCi/L 105 86.9 121 Pass Detector 4 Ce-141 pCi/L 122 125 98.0 Pass Co-58 pCi/L 126 128 98.7 Pass Co-60 pCi/L 155 154 100 Pass Cr-51 pCi/L 257 242 106 Pass Cs-134 pCi/L 145 151 96.3 Pass Cs-137 pCi/L 116 110 106 Pass Fe-59 pCi/L 116 109 107 Pass Mn-54 pCi/L 122 112 109 Pass Zn-65 pCi/L 195 211 92.6 Pass E13390 Milk I-131 pCi/L 89.0 86.9 102 Pass Detector 5 Ce-141 pCi/L 127 125 102 Pass Co-58 pCi/L 118 128 92.0 Pass Co-60 pCi/L 147 154 95.3 Pass Cr-51 pCi/L 302 242 125 Pass Cs-134 pCi/L 134 151 88.5 Pass Cs-137 pCi/L 111 110 101 Pass Fe-59 pCi/L 121 109 111 Pass Mn-54 pCi/L 118 112 105 Pass Zn-65 pCi/L 190 211 90.0 Pass E13391 Water Gr-B pCi/L 250 283 88.3 Pass S5E E13392 Charcoal I-131 pCi 79.7 88.2 90.4 Pass Detector 4 E13392 Charcoal I-131 pCi 79.5 88.2 90.1 Pass Detector 5 June 2021 E13395 AP Ce-141 pCi 146 132 110 Pass Detector 4 Co-58 pCi 133 131 102 Pass Co-60 pCi 171 158 108 Pass Cr-51 pCi 416 390 107 Pass Cs-134 pCi 136 156 87.0 Pass Cs-137 pCi 138 138 99.8 Pass Fe-59 pCi 161 134 120 Pass Mn-54 pCi 204 183 111 Pass Zn-65 pCi 255 220 116 Fail(1)

E13395 AP Ce-141 pCi 141 132 107 Pass Detector 5 Co-58 pCi 136 131 104 Pass Co-60 pCi 164 158 104 Pass Cr-51 pCi 426 390 109 Pass Cs-134 pCi 138 156 88.4 Pass Cs-137 pCi 142 138 103 Pass Fe-59 pCi 163 134 121 Pass Mn-54 pCi 208 183 114 Pass Zn-65 pCi 230 220 105 Fail(1)

E13396 AP Gr-B pCi 166 143 116 Pass S5E Gr-B pCi 163 143 114 Pass (a) The Analytics known value is equal to 100% of the parameter present in the standard as determined by gravimetric and/or volumetric measurements made during standard preparation (b) Analytics evaluation based on EIS internal QC limits in accordance with the NRC Resolution Test criteria Exelon Industrial Services (2021)

Analytics Environmental Radioactivity Cross Check Program F-8

TABLE F.4 Month/Year Identification Number Matrix Nuclide Units EIS Reported Value Known Value (a)

Ratio of Analytics to EIS Result Evaluation (b)

Exelon Industrial Services (2021)

Analytics Environmental Radioactivity Cross Check Program E13394 Water I-131 pCi/L 103 92.0 112 Pass Detector 3 Ce-141 pCi/L 161 180 89.4 Pass Co-58 pCi/L 176 179 98.5 Pass Co-60 pCi/L 222 215 103 Pass Cr-51 pCi/L 506 533 95.0 Pass Cs-134 pCi/L 198 213 92.9 Pass Cs-137 pCi/L 193 188 103 Pass Fe-59 pCi/L 202 183 110 Pass Mn-54 pCi/L 250 249 100 Pass Zn-65 pCi/L 304 300 101 Pass E13394 Water I-131 pCi/L 94.3 92.0 103 Pass Detector 4 Ce-141 pCi/L 176 180 97.6 Pass Co-58 pCi/L 173 179 96.5 Pass Co-60 pCi/L 216 215 100 Pass Cr-51 pCi/L 514 533 96.4 Pass Cs-134 pCi/L 195 213 91.5 Pass Cs-137 pCi/L 193 188 103 Pass Fe-59 pCi/L 181 183 98.7 Pass Mn-54 pCi/L 236 249 94.9 Pass Zn-65 pCi/L 298 300 99.3 Pass E13394 Water I-131 pCi/L 91.2 92.0 99.1 Pass Detector 5 Ce-141 pCi/L 201 180 112 Pass Co-58 pCi/L 168 179 93.9 Pass Co-60 pCi/L 226 215 105 Pass Cr-51 pCi/L 521 533 97.7 Pass Cs-134 pCi/L 193 213 90.6 Pass Cs-137 pCi/L 187 188 99.5 Pass Fe-59 pCi/L 199 183 109 Pass Mn-54 pCi/L 247 249 99.2 Pass Zn-65 pCi/L 275 300 91.7 Pass E13393 Water Gr-B pCi/L 225 250 90 Pass S5E September 2021 E13397 AP Gr-B pCi 220 217 101 Pass S5E Gr-B pCi 211 217 97 Pass December 2021 E13398 AP Ce-141 pCi 91.5 99.7 91.8 Pass Detector 4 Co-58 pCi 79.1 86.6 91.3 Pass Co-60 pCi 167 169 98.5 Pass Cr-51 pCi 190 222 85.4 Pass Cs-134 pCi 97.7 126 77.5 Pass Cs-137 pCi 79.2 88.7 89.3 Pass Fe-59 pCi 85.3 85.3 100 Pass Mn-54 pCi 110 115 95.5 Pass Zn-65 pCi 180 195 92.5 Fail(1)

(a) The Analytics known value is equal to 100% of the parameter present in the standard as determined by gravimetric and/or volumetric measurements made during standard preparation (b) Analytics evaluation based on EIS internal QC limits in accordance with the NRC Resolution Test criteria F-9

TABLE F.4 Month/Year Identification Number Matrix Nuclide Units EIS Reported Value Known Value (a)

Ratio of Analytics to EIS Result Evaluation (b)

Exelon Industrial Services (2021)

Analytics Environmental Radioactivity Cross Check Program December 2021 E13398 AP Ce-141 pCi 94.9 99.7 95.2 Pass Detector 5 Co-58 pCi 79.7 86.6 92.0 Pass Co-60 pCi 154 169 91.2 Pass Cr-51 pCi 212 222 95.3 Pass Cs-134 pCi 94.7 126 75.1 Pass Cs-137 pCi 76.4 88.7 86.2 Pass Fe-59 pCi 92.6 85.3 109 Pass Mn-54 pCi 110 115 95.8 Pass Zn-65 pCi 182 195 93.1 Fail(1)

E13399 Water Gr-B pCi/L 287 281 102 Pass S5E E13400 Charcoal I-131 pCi 91.7 94.3 97.2 Pass Detector 3 E13400 Charcoal I-131 pCi 89.1 94.3 94.5 Pass Detector 4 E13400 Charcoal I-131 pCi 88.9 94.3 94.3 Pass Detector 5 E13401 Milk I-131 pCi/L 84.3 90.3 93.4 Pass Detector 3 Ce-141 pCi/L 131 132 98.9 Pass Co-58 pCi/L 104 114 91.2 Pass Co-60 pCi/L 224 223 101 Pass Cr-51 pCi/L 285 293 97.3 Pass Cs-134 pCi/L 160 166 96.4 Pass Cs-137 pCi/L 114 117 97.5 Pass Fe-59 pCi/L 125 113 111 Pass Mn-54 pCi/L 156 152 102 Pass Zn-65 pCi/L 253 257 98.4 Pass E13401 Milk I-131 pCi/L 94.8 90.3 105 Pass Detector 4 Ce-141 pCi/L 115 132 87.3 Pass Co-58 pCi/L 106 114 93.3 Pass Co-60 pCi/L 232 223 104 Pass Cr-51 pCi/L 265 293 90.6 Pass Cs-134 pCi/L 161 166 96.9 Pass Cs-137 pCi/L 116 117 99.3 Pass Fe-59 pCi/L 119 113 105 Pass Mn-54 pCi/L 164 152 108 Pass Zn-65 pCi/L 261 257 102 Pass (a) The Analytics known value is equal to 100% of the parameter present in the standard as determined by gravimetric and/or volumetric measurements made during standard preparation (b) Analytics evaluation based on EIS internal QC limits in accordance with the NRC Resolution Test criteria F-10

TABLE F.5 Month/Year ID Number Matrix Nuclide Units EIS Reported Value Known Value (a)

Acceptance Ratio of ERA to EIS Result Evaluation (b)

April 2021 RAD-125 Water Ba-133 pCi/L 86.1 90.5 95.1 Pass Detector 3 Cs-134 pCi/L 69.0 70.5 97.9 Pass Cs-137 pCi/L 163 168 97.0 Pass Co-60 pCi/L 22.3 20.9 107 Pass Zn-65 pCi/L 171.5 177 97 Pass I-131 pCi/L 28.7 26.7 107 Pass S5E GR-B pCi/L 58.1 67.5 86.0 Pass September 2021 MRAD-35 AP Cs-134 pCi 218 241 90.5 Pass Detector 4 Cs-137 pCi 210 187 112 Pass Co-60 pCi 356 310 115 Pass Zn-65 pCi 411 366 112 Pass October 2021 RAD-127 Water Ba-133 pCi/L 83.9 87.5 95.9 Pass Detector 5 Cs-134 pCi/L 66.8 70.1 95.3 Pass Cs-137 pCi/L 152 156 97.4 Pass Co-60 pCi/L 83.4 85.9 97.1 Pass Zn-65 pCi/L 142 145 97.9 Pass Detector 3 I-131 pCi/L 29.9 26.4 113 Pass (a) The ERA known value is equal to 100% of the parameter present in the standard as determined by gravimetric and/or volumetric measurements made during standard preparation.

(b) ERA evaluation based on EIS internal QC limits in accordance with the NRC Resolution Test criteria (2) Passed vendor acceptance criteria, but failed NRC Resolution Test criteria ERA Environmental Radioactivity Cross Check Program Exelon Industrial Services (2021)

F-11

TABLE F.6 Quarter/Year Identification Number Matrix Nuclide Units Reported Value Known Value (a)

Acceptance Range Evaluation (b) 2nd/2021 21-MaW44 Water H-3 Bq/L 2.27 False Positive Test A

4th/2021 21-MaW45 Water H-3 Bq/L 231 250 175 - 325 A

(a) The MAPEP known value is equal to 100% of the parameter present in the standard as determined by gravimetric and/or volumetric measurements made during standard preparation (b) DOE/MAPEP evaluation:

A = Acceptable - reported result falls within ratio limits of 0.80-1.20 W = Acceptable with warning - reported result falls within 0.70-0.80 or 1.20-1.30 N = Not Acceptable - reported result falls outside the ratio limits of < 0.70 and > 1.30 DOE's Mixed Analyte Performance Evaluation Program (MAPEP)

GEL Laboratories F-12

TABLE F.7 Quarter/Year Identification Number Matrix Nuclide Units Reported Value Known Value (a)

Acceptance Limits Evaluation (b) 1st/2021 RAD-124 Water H-3 pCi/L 2,000 2,120 1,750 - 27,800 A

H-3 pCi/L 2,020 2,120 1,750 - 27,800 A

2nd/2021 MRAD-34 Water H-3 pCi/L 24,900 22,800 17,200 - 27,800 A

3rd/2021 RAD-126 Water H-3 pCi/L 9,820 10,400 9,050 - 11,400 A

H-3 pCi/L 10,300 10,400 9,050 - 11,400 A

4th/2021 MRAD-35 Water H-3 pCi/L 12,600 12,800 9,650 - 15,600 A

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

(b) ERA evaluation: A = Acceptable - Reported value falls within the Acceptance Limits N = Not Acceptable - Reported value falls outside of the Acceptance Limits ERA Environmental Radioactivity Cross Check Program GEL Laboratories F-13

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APPENDIX G ANNUAL RADIOLOGICAL GROUNDWATER PROTECTION PROGRAM REPORT (ARGPPR)

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Docket No:

50-277 50-278 PEACH BOTTOM ATOMIC POWER STATION UNITS 2 and 3 Annual Radiological Groundwater Protection Program Report (ARGPPR)

January 1 through December 31, 2021 Prepared By Teledyne Brown Engineering Environmental Services Peach Bottom Atomic Power Station Delta, PA 17314 May 2022

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i Table of Contents I. Summary and Conclusions.............................................................................................. 1 II. Introduction...................................................................................................................... 2 A. Objectives of the RGPP....................................................................................... 2 B. Implementation of the Objectives........................................................................ 3 C. Program Description............................................................................................ 3 D. Characteristics of Tritium..................................................................................... 4 III. Program Description....................................................................................................... 5 A. Sample Analysis.................................................................................................. 5 B. Data Interpretation............................................................................................... 5 C. Background Analysis........................................................................................... 6

1. Background Concentrations of Tritium...................................................... 6 IV. Results and Discussion................................................................................................. 8 A. Groundwater Results........................................................................................... 8 B. Surface Water Results......................................................................................... 8 C. Precipitation Water Results................................................................................. 9 D. Drinking Water Well Survey................................................................................. 9 E. Summary of Results - Inter-laboratory Comparison Program............................. 9 F. Leaks, Spills and Releases.................................................................................. 9 G. Trends................................................................................................................. 9 H. Investigations....................................................................................................... 9 I. Actions Taken..................................................................................................... 12 J. Deviations........................................................................................................... 12 V. References................................................................................................................... 12

ii Appendices Appendix A Sampling Locations, Distance and Direction Tables Table A-1 Radiological Groundwater Protection Program - Sampling Locations, Distance and Direction, Peach Bottom Atomic Power Station, 2021 Figures Figure A-1 Well Water Locations, Peach Bottom Atomic Power Station, 2021 Figure A-2 RGPP Monitoring Locations, Peach Bottom Atomic Power Station, 2021 Figure A-3 RGPP Precipitation Monitoring Locations, Peach Bottom Atomic Power Station, 2021 Appendix B Data Tables Tables Table B-I.1 Concentrations of Tritium, Strontium, Gross Alpha and Gross Beta in Groundwater and Seep Samples Collected as Part of the Radiological Groundwater Protection Program, Peach Bottom Atomic Power Station, 2021 Table B-I.2 Concentrations of Gamma Emitters in Groundwater and Seep Water Samples Collected as Part of the Radiological Groundwater Protection Program, Peach Bottom Atomic Power Station, 2021 Table B-I.3 Concentrations of Hard-to-Detects in Groundwater Samples Collected as Part of the Radiological Groundwater Protection Program, Peach Bottom Atomic Power Station, 2021 Table B-II.1 Concentrations of Tritium in Surface Water Samples Collected as Part of the Radiological Groundwater Protection Program, Peach Bottom Atomic Power Station, 2021 Table B-III.1 Concentrations of Tritium in Precipitation Water Samples Collected as Part of the Radiological Groundwater Protection Program, Peach Bottom Atomic Power Station, 2021

1 I.

Summary and Conclusions This report on the Radiological Groundwater Protection Program (RGPP) conducted for the Peach Bottom Atomic Power Station (PBAPS) by Constellation Nuclear covers the period 01 January 2021 through 31 December 2021. This evaluation involved numerous station personnel and contractor support personnel. At PBAPS, there are 31 permanent groundwater monitoring wells.

Installation of the wells began in 2006. Of these monitoring locations, none are assigned to the stations Radiological Environmental Monitoring Program (REMP).

This report covers groundwater, surface water, seep water, and precipitation water samples collected from the environment on station property in 2021. During that time period, 317 analyses were performed on 248 samples from 36 locations.

These 36 locations include 21 groundwater monitoring wells, 2 surface water sample points, 3 groundwater seeps, 2 yard drain sumps, and 8 precipitation water sampling points. Phase 1 of the monitoring was part of a comprehensive study initiated by Constellation to determine whether groundwater or surface water in the vicinity of PBAPS had been adversely impacted by any releases of radionuclides. Phase 1 was conducted by Conestoga Rovers and Associates (CRA) and the conclusions were made available to state and federal regulators as well as the public. Phase 2 of the RGPP was conducted by Constellation corporate and station personnel to initiate follow up of Phase 1 and begin long-term monitoring at groundwater and surface water locations selected during Phase 1. All analytical results from Phase 2 monitoring are reported herein.

Samples supporting the RGPP were analyzed for tritium (H-3), strontium-89 (Sr-89), strontium-90 (Sr-90), gamma-emitting radionuclides associated with licensed plant operations and isotopes known as hard to detects.

In assessing all the data gathered for this report, it was concluded that the operation of PBAPS had no adverse radiological impact on the environment and there are currently no known active releases into the groundwater at PBAPS.

Tritium was not detected in any groundwater sample greater than the United States Environmental Protection Agency (USEPA) drinking water standard (and the Nuclear Regulatory Commission [NRC] Reporting Limit) of 20,000 pCi/L.

Tritium was not detected at concentrations greater than the minimum detectable concentration (MDC) in any surface water or seep water sample locations. Based on the sample data, tritium is not migrating off the station property at detectable concentrations. Tritium was detected in 3 precipitation water sample locations but below the 20,000 pCi/L limit.

2 II.

Introduction PBAPS is located along the Susquehanna River between Holtwood and Conowingo Dams in Peach Bottom Township, York County, Pennsylvania. The initial loading of fuel into Unit 1, a 40 MWe (net) high temperature gas-cooled reactor, began on 5 February 1966, and initial criticality was achieved on 3 March 1966. Shutdown of Peach Bottom Unit 1 for decommissioning was on 31 October 1974. For the purposes of the monitoring program, the beginning of the operational period for Unit 1 was considered to be 5 February 1966. A summary of the Unit 1 preoperational monitoring program was presented in a previous report (1). PBAPS Units 2 and 3 are boiling water reactors, each with a power output of approximately 1385 MWe.

The first fuel was loaded into Peach Bottom Unit 2 on 9 August 1973. Criticality was achieved on 16 September 1973 and full power was reached on 16 June 1974. The first fuel was loaded into Peach Bottom Unit 3 on 5 July 1974. Criticality was achieved on 7 August 1974 and full power was first reached on 21 December 1974.

Preoperational summary reports (2)(3) for Units 2 and 3 have been previously issued and summarize the results of all analyses performed on samples collected from 5 February 1966 through 8 August 1973.

This report covers those analyses performed by Teledyne Brown Engineering (TBE) and GEL Laboratories (GEL) on samples collected in 2021.

A.

Objective of the RGPP The objectives of the RGPP are as follows:

1. Ensure that the site characterization of geology and hydrology provides an understanding of predominant groundwater gradients based upon current site conditions.
2. Identify site risk based on plant design and work practices.
3. Establish an on-site groundwater monitoring program to ensure timely detection of inadvertent radiological releases to ground water.
4. Establish a remediation protocol to prevent migration of licensed material off-site and to minimize decommissioning impacts.
5. Ensure that records of leaks, spills, remediation efforts are retained and retrievable to meet the requirements of 10 CFR 50.75(g).
6. Conduct initial and periodic briefings of their site specific Groundwater Protection Initiative (GPI) program with the designated State/Local officials.
7. Make informal communication as soon as practicable to appropriate State/Local officials, with follow-up notifications to the NRC, as appropriate, regarding significant on-site leaks/spills into groundwater and on-site or off-site water sample results exceeding the criteria in the REMP as described in the Offsite Dose Calculation Manual (ODCM).

3

8. Submit a written 30-day report to the NRC for any water sample result for on-site groundwater that is or may be used as a source of drinking water that exceeds any of the criteria in the licensees existing REMP/ODCM for 30-day reporting of off-site water sample results.
9. Document all on-site groundwater sample results and a description of any significant on-site leaks/spills into groundwater for each calendar year in the Annual Radiological Environmental Operating Report (AREOR) for REMP or the Annual Radioactive Effluent Release Report (ARERR).
10. Perform a self-assessment of the GPI program.
11. Conduct a review of the GPI program, including at a minimum the licensee's self-assessments, under the auspices of the Nuclear Energy Institute (NEI).

B.

Implementation of the Objectives The objectives identified have been implemented at PBAPS via Constellation Corporate and Site specific procedures. These procedures include:

1. EN-AA-407, Response to Inadvertent Releases of Licensed Materials to Groundwater, Surface Water, Soil or Engineered Structures
2. EN-AA-408, Radiological Groundwater Protection Program
3. EN-AA-408-4000, Radiological Groundwater Protection Program Implementation
4. EN-PB-408-4160, RGPP Reference Material for Peach Bottom Atomic Power Station C.

Program Description

1. Sample Collection Sample locations can be found in Table A-1 and Figures A-1, A-2 and A-3, Appendix A.

Groundwater, Surface Water and Precipitation Water Samples of water are collected, managed, transported and analyzed in accordance with approved procedures. Sample locations, sample collection frequencies and analytical frequencies are controlled in accordance with approved station procedures. Contractor and/or station personnel are trained in the collection, preservation management and shipment of samples, as well as in documentation of sampling events. Analytical laboratories are subject to internal quality assurance programs, industry cross-check programs, as well as nuclear industry audits. Station personnel review and evaluate all analytical data deliverables as data are received.

4 Analytical data results are reviewed by both station personnel and an independent hydro geologist for adverse trends or changes to hydrogeologic conditions.

D.

Characteristics of Tritium Tritium is a radioactive isotope of hydrogen. The most common form of tritium is tritium oxide, which is also called "tritiated water." The chemical properties of tritium are essentially those of ordinary hydrogen.

Tritiated water behaves the same as ordinary water in both the environment and the body. Tritium can be taken into the body by drinking water, breathing air, eating food or absorption through skin. Once tritium enters the body it disperses quickly and is uniformly distributed throughout the body. Tritium is excreted primarily through urine with a clearance rate characterized by an effective biological half-life of about 14 days. Within one month or so after ingestion essentially all tritium is cleared. Organically bound tritium (tritium that is incorporated in organic compounds) can remain in the body for a longer period.

Tritium is produced naturally in the upper atmosphere when cosmic rays strike air molecules. Tritium is also produced during nuclear weapons explosions, as a by-product in reactors producing electricity and in special production reactors, where the isotopes lithium-7 (Li-7) and/or boron-10 (B-

10) are activated to produce tritium. Like normal water, tritiated water is colorless and odorless. Tritiated water behaves chemically and physically like non-tritiated water in the subsurface and therefore tritiated water will travel at the same velocity as the average groundwater velocity.

Tritium has a half-life of approximately 12.3 years. It decays spontaneously to helium-3 (He-3). This radioactive decay releases a beta particle (low-energy electron). The radioactive decay of tritium is the source of the health risk from exposure to tritium. Tritium emits a low energy beta particle and leaves the body relatively quickly. Since tritium is almost always found as water, it goes directly into soft tissues and organs. The associated dose to these tissues is generally uniform and is dependent on the water content of the specific tissue.

5 III.

Program Description A.

Sample Analysis This section describes the general analytical methodologies used by TBE and GEL Laboratories (GEL) to analyze the environmental samples for radioactivity for the PBAPS RGPP in 2021.

In order to achieve the stated objectives, the current program includes the following analyses:

1. Concentrations of gamma emitters in groundwater.
2. Concentrations of strontium in groundwater.
3. Concentrations of tritium in groundwater, surface water and precipitation water.
4. Concentrations of 'hard-to-detect' isotopes, americium-241 (Am-241), cerium-242/243/244 (Cm-242, Cm-243, Cm-244),

plutonium-238/239/240 (Pu-238, Pu-239, Pu-240), uranium-233/234/235/238 (U-233, U-234, U-235, U-238), iron-55 (Fe-55), and nickel-63 (Ni-63) in groundwater. These analyses are required based on historical tritium results.

B.

Data Interpretation The radiological data collected prior to PBAPS becoming operational were used as a baseline for operational data comparison. For the purpose of this report, PBAPS was considered operational at initial criticality. Several factors were important in the interpretation of the data:

1. Lower Limit of Detection The lower limit of detection (LLD) is a minimum sensitivity value that must be achieved routinely by the analytical parameter.
2. Laboratory Measurements Uncertainty The estimated uncertainty in measurement of tritium in environmental samples is frequently on the order of 50% of the measurement value.

Statistically, the exact value of a measurement is expressed as a range with a stated level of confidence. The convention is to report results with a 95% level of confidence. The uncertainty comes from factors such as calibration standards, sample volume or weight measurements, and sampling uncertainty. Constellation reports the uncertainty of a measurement created by statistical process (counting error) as well as all sources of error (Total Propagated Uncertainty or TPU). Each result has two values calculated. Constellation reports the TPU by following the result with plus or minus (+/-) the estimated sample standard deviation.

6 Analytical uncertainties are reported at the 95% confidence level in this report for reporting consistency with the AREOR.

Groundwater was analyzed using gamma spectroscopy for the following isotopes: Mn-54, Co-58, Co-60, Fe-59, Zn-65, Nb-95, Zr-95, I-131, Cs-134, Cs-137, Ba-140 and La-140.

C.

Background Analysis A pre-operational REMP was conducted to establish background radioactivity levels prior to operation of the Station. The environmental media sampled and analyzed during the pre-operational REMP were atmospheric radiation, fall-out, domestic water, surface water, marine life and foodstuffs. The results of the monitoring were detailed in References 2 and 3. The pre-operational REMP contained analytical results from samples collected from the surface water, discharge, well water and rainwater.

1. Background Concentrations of Tritium The purpose of the following discussion is to summarize background measurements of tritium in various media performed by others.

Additional detail may be found by consulting references (CRA 2006)(1).

a. Tritium Production Tritium is created in the environment from naturally occurring processes both cosmic and subterranean, as well as from anthropogenic (i.e., man-made) sources. In the upper atmosphere, Cosmogenic tritium is produced from the bombardment of stable nuclides and combines with oxygen to form tritiated water, which will then enter the hydrologic cycle.

Below ground, lithogenic tritium is produced by the bombardment of natural Li present in crystalline rocks by neutrons produced by the radioactive decay of naturally abundant U and Th. Lithogenic production of tritium is usually negligible compared to other sources due to the limited abundance of Li in rock. The lithogenic tritium is introduced directly to groundwater.

A major anthropogenic source of tritium and Sr-90 comes from the former atmospheric testing of thermonuclear weapons. Levels of tritium in precipitation increased significantly during the 1950s and early 1960s and later with additional testing, resulting in the release of significant amounts of tritium to the atmosphere. The Canadian heavy water nuclear power reactors, other commercial power reactors, nuclear research and weapons production continue to influence tritium concentrations in the environment.

b. Precipitation Data Precipitation monitoring was done at PBAPS until 2006. These

7 types of samples are routinely collected at stations around the world for the analysis of tritium and other radionuclides. Two publicly available databases that provide tritium concentrations in precipitation are Global Network of Isotopes in Precipitation (GNIP) and USEPAs RadNet database. GNIP provides tritium precipitation concentration data for samples collected worldwide from 1960 to 2006. RadNet provides tritium precipitation concentration data for samples collected at stations throughout the U.S. from 1960 up to and including 2006. Based on GNIP data for sample stations located in the U.S. Midwest, tritium concentrations peaked around 1963. This peak, which approached 10,000 pCi/L for some stations, coincided with the atmospheric testing of thermonuclear weapons. Tritium concentrations in surface water showed a sharp decline until 1975. A gradual decline has followed since that time. Tritium concentrations have typically been below 100 pCi/L since around 1980. Tritium concentrations in wells may still be above the 200 pCi/L detection limit from the external causes described above. Water from previous years and decades is naturally captured in groundwater, so some well water sources today are affected by the surface water from the 1960s that was elevated in tritium.

c.

Surface Water Data Surface water level measurements were collected at the surface water monitoring locations during the groundwater level measurement event. The purpose of the surface water monitoring was to provide surface water elevation data to evaluate the groundwater/surface water interaction at the Station.

The USEPA RadNet surface water data typically has a reported Combined Standard Uncertainty of 35 to 50 pCi/L. According to USEPA, this corresponds to a +/- 70 to 100 pCi/L 95% confidence bound on each given measurement. Therefore, the typical background data provided may be subject to measurement uncertainty of approximately +/- 70 to 100 pCi/L.

The radio-analytical laboratory is counting tritium results to an Constellation-specified LLD of 200 pCi/L. Typically, the lowest positive measurement will be reported within a range of 40 - 240 pCi/L or 140 +/- 100 pCi/L. Clearly, these sample results cannot be distinguished as different from background at this concentration.

8 IV.

Results and Discussion A.

Groundwater Results Groundwater samples were collected from on-site wells throughout the year in accordance with the station RGPP. Analytical results and anomalies are discussed below:

Tritium Samples from 26 locations were analyzed for tritium activity. These locations include 24 wells and the 2 yard drains sampled during the quarterly sampling events as part of the RGPP program. Tritium was not detected in wells at or near the owner-controlled boundary. The location most representative of potential offsite user of drinking water is less than the MDC.

Low levels of tritium were detected at concentrations greater than the minimum detectable concentration (MDC) in 12 of the 26 locations (24 groundwater monitoring wells and the 2 yard drain locations). The tritium concentrations ranged from the detection limit to 12,200 pCi/L.

(Table B-I.1, Appendix B)

Strontium Sr-89 and Sr-90 were not detected in any of the samples.

(Table B-I.1, Appendix B)

Hard-To-Detect Hard-To-Detect analyses were performed on one groundwater location.

The analyses included Am-241, Cm-242, Cm-243/244, Pu-238, Pu-239/240, U-234, U-235, U-238, Fe-55 and Ni-63.

U-234 was detected in the one location at a concentration of 0.93 pCi/L.

U-238 was detected in the one location at a concentration of 0.44 pCi/L.

The activity detected is naturally occurring and the levels are considered to be background. All other Hard-To-Detect analyses were less than the MDC. (Table B-I.3, Appendix B)

Gamma Emitters No power-production gamma emitters were detected in the sample.

(Table B-I.2, Appendix B)

B.

Surface Water Results Surface Water samples were collected from two surface water locations throughout the year in accordance with the station RGPP. Analytical results are discussed below:

9 Tritium Samples from two locations were analyzed for tritium activity. Tritium was not detected in any surface water locations greater than the MDC.

(Table B-II.1, Appendix B)

C.

Precipitation Water Results Samples were collected at eight locations (PB-P1, PB-P2, PB-P3, PB-P4, PB-P5, PB-P6, PB-P7, and PB-P8) in accordance with the station RGPP.

The following analysis was performed:

Tritium Samples from eight locations were analyzed for tritium activity. Tritium activity was detected in three locations greater than the MDC. The concentrations ranged from 192 to 210 pCi/L. (Table B-III.1, Appendix B)

D.

Drinking Water Well Survey A drinking water well survey was conducted during the summer 2006 by CRA (CRA 2006)(1) around PBAPS. The water well inventory was updated in 2012(4). The updated water well database search indicated a new water well off Station property within a one mile radius of the Station. The well is described as a test well and its use is listed as unused. In summary, there were no significant changes in off Station groundwater use from 2006-2012.

E.

Summary of Results - Inter-Laboratory Comparison Program Inter-Laboratory Comparison Program results for TBE and GEL are presented in the AREOR.

F.

Leaks, Spills and Releases Based on analytical data collected in 2021, there does not appear to be an active source of tritium to groundwater.

G.

Trends A tritium plume has been identified northeast of the Unit 3 Turbine Building.

The plume extends eastward toward well MW-PB-4. The plume is bounded on the north by wells MW-PB-12 and MW-PB-22. The plume is bounded on the south by wells MW-PB-20 and MW-PB-21.

The tritium plume is a result of licensed material entering the groundwater through degraded floor seams and penetration seals in the Unit 3 Turbine Building. The activity currently detected in the Unit 3 Turbine Building monitoring wells, MW-PB-24, 25, 26 and 27, is the result of legacy licensed material under the turbine building being transported eastward by natural hydrogeologic groundwater flow.

10 Tritium activity in the Unit 3 Turbine Building monitoring wells are trended.

Any adverse trend is captured in the Stations Corrective Action Program.

During the 4th quarter 2020, the tritium concentration unexpectedly increased in the samples collected from Unit 3 Yard Drain and bedrock aquifer well MW-PB-28, from less than 200 pCi/L to 1,670 pCi/L and 1,540 pCi/L, respectively. An additional sample was collected from both locations in the middle of January 2021. The tritium concentration in the sample collected from Unit 3 Yard Drain increased to 2,850 pCi/L and the tritium concentration in the sample collected from MW-PB-28 increased to 3,690 pCi/L. Tritium concentrations in the area of MW-PB-28 and Unit 3 Yard Drain decreased to less than 400 pCi/L by the end of 2021.

H.

Investigations MW-PB-4 In 2006, monitoring wells MW-PB-1 through MW-PB-14 were installed.

Tritium activity was detected in MW-PB-4, located north of the Unit 3 Circulating Water Pump Structure and MW-PB-12, north of the Administration Building. Groundwater flow on site is from west to east.

Monitoring wells were installed to the west, southwest and northwest of monitoring wells MW-PB-4 and MW-PB-12. The wells with the highest tritium activity are the wells installed directly east of and adjacent to the Unit 3 Turbine Building, wells MW-PB-24, 25, 26 and 27.

Investigation of potential sources identified that the likely source of groundwater contamination was due to degraded floor seams in the Unit 3 Turbine Building Moisture Separator area 116' elevation. Leaks internal to the building entered the groundwater through the degraded floor seams.

The floor seams were repaired in August 2010. The floor in the Unit 3 Turbine Building Moisture Separator area 116' elevation was sealed and recoated in October 2011.

MW-PB-29, 30 and 31 An extent-of-condition inspection of the Unit 2 Turbine Building Moisture Separator area 116' elevation floor was performed in October 2010. Minor degradation of the floor seams was identified and repaired. In May 2011, monitoring wells MW-PB-29 and 30 were installed directly east of and adjacent to the Unit 2 Turbine Building; MW-PB-31 was installed southeast of and adjacent to the Unit 2 Turbine Building. These wells were installed to determine if a condition existed east of the Unit 2 Turbine Building that is similar to the condition east of the Unit 3 Turbine Building.

Tritium activity in these wells ranged from less than the MDC to 2,720 pCi/L. Samples from these wells were also analyzed for gamma-emitting isotopes and hard-to-detect radionuclides. All results are less than the MDC for each isotope.

11 The Unit 2 Turbine Building Moisture Separator floor 116' elevation floor was sealed and recoated in October 2012. Groundwater intrusion into a ventilation pit on the east side of the area was identified. The groundwater was removed and degraded seams in the ventilation pit were successfully repaired.

MW-PB-24, 25, 26 and 27 Wells MW-PB-24, 25, 26 and 27 are considered the wells of primary interest. These wells were sampled on a frequency ranging from weekly to quarterly. Below are 3 tables. The first lists the highest tritium activity of the wells of primary interest and the date of the sampling. The second table lists the highest tritium activity of the wells during 2021. The third table lists the activity of the wells from the last sampling of 2021. The tritium activity is in pCi/L.

Well #

Tritium Activity Date MW-PB-24 1,530 06/06/2018 MW-PB-25 161,000 03/08/2010 MW-PB-26 196,000 03/08/2010 MW-PB-27 71,800 2/22/2010 Well #

Tritium Activity Date MW-PB-24 406 09/28/2021 MW-PB-25 10,900 02/24/2021 MW-PB-26 353 09/28/2021 MW-PB-27 705 05/25/2021 Well #

Tritium Activity Date MW-PB-24 176 12/09/2021 MW-PB-25 193 12/09/2021 MW-PB-26 216 12/09/2021 MW-PB-27 499 12/09/2021 Potential sources of tritium in the groundwater are investigated via procedural processes and documented in the corrective action program.

The most likely pathway for tritium to enter the groundwater has been determined to be leaks internal to the Unit 3 Turbine Building Moisture Separator 116', migrating through degraded floor seams or other unidentified openings in the floor.

MW-PB-28 Increased the monitoring frequency for MW-PB-28 in January and started an investigation to ensure there were no active leaks. Investigation of the areas of the Unit 3 Yard Drains and MW-PB-28 identified tritium in the Torus Dewater Tank Moat as a result of a small packing leak. It was noted that the condition of the Torus Dewatering Tank Moat could allow

12 for the leaking water to penetrate the concrete and seep into the ground.

I.

Actions Taken

1. The Unit 3 Condensate storage tank moat, sump and valve pit were cleaned and recoated to eliminate a potential pathway for licensed material to enter the groundwater. These activities were completed under work order 04602739 and work request 01339203.
2. During P3R21, the Unit 3 Recombiner Jet Compressor room floor drains were found plugged. One plug was removed, and the second plug was modified to allow water to drain to the radwaste system in the event of a licensed material leak. This was completed under work request 01369404.
3. Installation of Monitoring Wells No groundwater monitoring wells were installed in 2021.
4. Actions to Recover/Reverse Plumes There were no actions to recover the plume.
5. Removed the tritiated water from the Torus Dewatering Tank Moat and repaired the packing leak. Sealed the cracks observed in the moat surface, temporarily recoated the moat and will be permanently recoating the moat in 2023.

J.

Deviations The data tables show that duplicate samples were obtained at several wells during 2021. These duplicate samples were obtained and analyzed for quality control purposes.

V.

References

1. Conestoga Rovers and Associates, Fleetwide Assessment, Peach Bottom Atomic Power Station, Delta, PA, Fleetwide Assessment, Rev. 1, September 1, 2006.
2. Peach Bottom Atomic Power Station (PBAPS), Environs Radiation Monitoring Program, Preoperational Summary Report Units 2 and 3, June 1977.
3. Peach Bottom Atomic Power Station (PBAPS), Environs Radiation Monitoring Program, Preoperational Summary Report Units 2 and 3, September 1970-August 1973, January 1974.
4. Conestoga Rovers and Associates, Hydrogeologic Investigation Report, Peach Bottom Atomic Power Station, November 2012.
5. AMO Environmental Decisions, 2021 RGPP Summary Monitoring Reports, April 2021, August 2021, October 2021 and February 2021.

APPENDIX A SAMPLING LOCATIONS, DISTANCE AND DIRECTION

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TABLE A-1: Radiological Groundwater Protection Program - Sampling Locations, Distance and Direction, Peach Bottom Atomic Power Station, 2021 Site Site Type Sector Distance (ft.)

MW-PB-1 Groundwater Well SW 1,166.6 MW-PB-2 Groundwater Well WNW 309.0 MW-PB-3 Groundwater Well SSE 709.7 MW-PB-4 Groundwater Well ENE 350.2 MW-PB-5 Groundwater Well NNW 1,146.1 MW-PB-6 Groundwater Well NE 1,072.4 MW-PB-7 Groundwater Well SE 813.9 MW-PB-8 Groundwater Well SE 1,167.0 MW-PB-10 Groundwater Well SSE 1,125.1 MW-PB-12 Groundwater Well NNE 317.2 MW-PB-13 Groundwater Well NW 329.4 MW-PB-15 Groundwater Well SE 1,087.9 MW-PB-16 Groundwater Well SE 1,101.6 MW-PB-19 Groundwater Well NW 226.8 MW-PB-20 Groundwater Well E

260.5 MW-PB-22 Groundwater Well NE 315.4 MW-PB-24 Groundwater Well N

185.9 MW-PB-25 Groundwater Well N

159.7 MW-PB-26 Groundwater Well NNE 121.1 MW-PB-27 Groundwater Well NNE 139.1 MW-PB-28 Groundwater Well NW 249.6 MW-PB-29 Groundwater Well SE 325.0 MW-PB-30 Groundwater Well SE 379.2 MW-PB-31 Groundwater Well SE 450.1 SW-PB-1 Surface Water NNW 2,850.5 SP-PB-1 Groundwater Seep S

514.2 SP-PB-2 Groundwater Seep WNW 311.6 U/2 YARD DRAIN SUMP Groundwater SSE 498.7 U/3 YARD DRAIN SUMP Groundwater WSW 175.8 PB-P1 Precipitation Water PB-P2 Precipitation Water PB-P3 Precipitation Water PB-P4 Precipitation Water PB-P5 Precipitation Water PB-P6 Precipitation Water PB-P7 Precipitation Water PB-P8 Precipitation Water

Figure A-1 Well Water Locations, Peach Bottom Atomic Power Station, 2021

Figure A-2 RGPP Monitoring Locations Peach Bottom Atomic Power Station, 2021

Figure A-3 RGPP Precipitation Monitoring Locations Peach Bottom Atomic Power Station, 2021

APPENDIX B DATA TABLES

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TABLE B-I.1 SAMPLES COLLECTED AS PART OF THE RADIOLOGICAL GROUNDWATER COLLECTION SITE DATE Sr-89 Sr-90 MW-PB-1 05/25/21

< 189 MW-PB-1 05/25/21 DUP

< 186 MW-PB-1 05/25/21 GEL

< 168 MW-PB-2 01/20/21

< 182 MW-PB-2 01/28/21

< 172 MW-PB-2 02/04/21

< 190 MW-PB-2 02/11/21

< 179 MW-PB-2 02/17/21

< 177 MW-PB-2 02/23/21

< 194 MW-PB-2 03/02/21

< 174 MW-PB-2 03/09/21

< 177 MW-PB-2 03/16/21

< 178 MW-PB-2 03/23/21

< 187 MW-PB-2 03/30/21

< 184 MW-PB-2 04/06/21

< 186 MW-PB-2 04/13/21

< 171 MW-PB-2 04/20/21

< 188 MW-PB-2 04/27/21

< 193 MW-PB-2 05/04/21

< 177 MW-PB-2 05/11/21

< 191 MW-PB-2 05/18/21

< 196 MW-PB-2 05/26/21

< 186 MW-PB-2 12/08/21

< 184 MW-PB-3 05/27/21

< 185 MW-PB-3 12/08/21

< 183 MW-PB-4 05/26/21

< 187 MW-PB-4 05/26/21 DUP

< 190 MW-PB-4 05/26/21 GEL

< 165 MW-PB-4 12/09/21

< 196 MW-PB-5 05/26/21

< 192 MW-PB-6 05/26/21

< 191 MW-PB-7 05/26/21

< 189 MW-PB-7 05/26/21 DUP

< 189 MW-PB-7 05/26/21 GEL

< 170 MW-PB-8 02/25/21

< 172 MW-PB-8 05/25/21

< 185

< 7.4

< 0.8 MW-PB-8 08/19/21

< 162 MW-PB-8 12/07/21

< 185 MW-PB-10 02/25/21

< 176 MW-PB-10 05/25/21

< 186

< 6.4

< 0.9 MW-PB-10 08/19/21

< 163 MW-PB-10 12/07/21

< 192 MW-PB-10 12/07/21 DUP

< 193 MW-PB-10 12/07/21 GEL

< 148 MW-PB-12 05/27/21

< 190 MW-PB-12 12/09/21

< 185 MW-PB-13 01/20/21

< 194 MW-PB-13 01/28/21

< 167 MW-PB-13 02/04/21

< 191 MW-PB-13 02/11/21

< 176 MW-PB-13 02/17/21

< 176 MW-PB-13 02/23/21

< 199 MW-PB-13 03/02/21

< 172 CONCENTRATIONS OF TRITIUM AND STRONTIUM IN GROUNDWATER PROTECTION PROGRAM, PEACH BOTTOM ATOMIC POWER STATION, 2021 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA H-3 B-1

TABLE B-I.1 SAMPLES COLLECTED AS PART OF THE RADIOLOGICAL GROUNDWATER COLLECTION SITE DATE Sr-89 Sr-90 CONCENTRATIONS OF TRITIUM AND STRONTIUM IN GROUNDWATER PROTECTION PROGRAM, PEACH BOTTOM ATOMIC POWER STATION, 2021 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA H-3 MW-PB-13 03/09/21 212 +/- 119 MW-PB-13 03/16/21

< 180 MW-PB-13 03/23/21

< 186 MW-PB-13 03/30/21

< 190 MW-PB-13 04/06/21

< 184 MW-PB-13 04/13/21

< 174 MW-PB-13 04/20/21

< 187 MW-PB-13 04/27/21

< 193 MW-PB-13 05/04/21

< 178 MW-PB-13 05/11/21

< 190 MW-PB-13 05/18/21 214 +/- 122 MW-PB-13 05/26/21

< 185 MW-PB-13 12/08/21

< 191 MW-PB-15 02/25/21

< 175 MW-PB-15 02/25/21 DUP

< 177 MW-PB-15 02/25/21 GEL

< 108 MW-PB-15 05/25/21

< 190

< 6.4

< 0.9 MW-PB-15 08/19/21

< 166 MW-PB-15 08/19/21 DUP

< 168 MW-PB-15 08/19/21 GEL

< 130 MW-PB-15 12/07/21

< 193 MW-PB-16 02/25/21

< 177 MW-PB-16 05/25/21

< 184

< 6.4

< 0.8 MW-PB-16 08/19/21

< 167 MW-PB-16 12/07/21

< 199 MW-PB-16 12/07/21 DUP

< 184 MW-PB-16 12/07/21 GEL

< 151 MW-PB-19 01/20/21

< 175 MW-PB-19 01/28/21

< 172 MW-PB-19 02/04/21

< 193 MW-PB-19 02/11/21

< 178 MW-PB-19 02/17/21

< 174 MW-PB-19 02/23/21

< 194 MW-PB-19 03/02/21 169 +/- 111 MW-PB-19 03/09/21 282 +/- 120 MW-PB-19 03/16/21

< 181 MW-PB-19 03/23/21

< 185 MW-PB-19 03/30/21

< 188 MW-PB-19 04/06/21 196 +/- 121 MW-PB-19 04/13/21 238 +/- 115 MW-PB-19 04/20/21

< 190 MW-PB-19 04/27/21

< 192 MW-PB-19 05/04/21

< 179 MW-PB-19 05/11/21

< 192 MW-PB-19 05/18/21

< 189 MW-PB-19 05/26/21

< 182

< 9.1

< 0.8 MW-PB-19 08/19/21

< 167 MW-PB-19 11/05/21

< 197 MW-PB-19 12/08/21

< 181 MW-PB-20 02/25/21

< 173 MW-PB-20 05/27/21

< 186

< 5.9

< 0.8 MW-PB-20 08/19/21

< 170 B-2

TABLE B-I.1 SAMPLES COLLECTED AS PART OF THE RADIOLOGICAL GROUNDWATER COLLECTION SITE DATE Sr-89 Sr-90 CONCENTRATIONS OF TRITIUM AND STRONTIUM IN GROUNDWATER PROTECTION PROGRAM, PEACH BOTTOM ATOMIC POWER STATION, 2021 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA H-3 MW-PB-20 12/09/21

< 184 MW-PB-22 05/27/21

< 186 MW-PB-22 12/09/21 284 +/- 127 MW-PB-24 01/20/21

< 182 MW-PB-24 02/24/21

< 190 MW-PB-24 03/23/21

< 185 MW-PB-24 04/20/21 247 +/- 125 MW-PB-24 05/25/21 277 +/- 130 MW-PB-24 06/22/21

< 173 MW-PB-24 07/20/21 227 +/- 119 MW-PB-24 08/19/21 220 +/- 126 MW-PB-24 09/28/21 406 +/- 127 MW-PB-24 10/26/21

< 196 MW-PB-24 11/17/21 296 +/- 118 MW-PB-24 12/09/21 176 +/- 110 MW-PB-25 01/20/21 2470 +/- 307 MW-PB-25 02/24/21 10900 +/- 1150 MW-PB-25 03/23/21 5390 +/- 602 MW-PB-25 04/20/21 7800 +/- 838 MW-PB-25 05/25/21 5600 +/- 622

< 7.3

< 0.8 MW-PB-25 06/22/21 3230 +/- 383 MW-PB-25 07/20/21 8120 +/- 868 MW-PB-25 08/19/21 9780 +/- 1040 MW-PB-25 09/28/21 10100 +/- 1060 MW-PB-25 10/26/21 1710 +/- 247 MW-PB-25 11/17/21 6700 +/- 727 MW-PB-25 12/09/21 193 +/- 116 MW-PB-26 01/20/21

< 178 MW-PB-26 02/24/21

< 192 MW-PB-26 03/23/21 216 +/- 122 MW-PB-26 04/20/21 247 +/- 123 MW-PB-26 05/25/21 215 +/- 123

< 5.5

< 0.8 MW-PB-26 06/22/21 276 +/- 116 MW-PB-26 07/20/21 242 +/- 120 MW-PB-26 08/19/21 177 +/- 112 MW-PB-26 08/19/21 DUP

< 190 MW-PB-26 08/19/21 GEL 164 +/- 90 MW-PB-26 09/28/21 353 +/- 123 MW-PB-26 11/17/21 310 +/- 131 MW-PB-26 12/09/21 216 +/- 111 MW-PB-27 01/20/21 316 +/- 124 MW-PB-27 02/24/21

< 188 MW-PB-27 03/23/21 632 +/- 147 MW-PB-27 04/20/21 302 +/- 126 MW-PB-27 05/25/21 705 +/- 151

< 9.0

< 0.9 MW-PB-27 06/22/21 238 +/- 117 MW-PB-27 07/20/21 360 +/- 124 MW-PB-27 08/19/21 228 +/- 126 MW-PB-27 09/28/21 322 +/- 122 MW-PB-27 10/26/21 527 +/- 140 MW-PB-27 11/17/21 374 +/- 124 MW-PB-27 12/09/21 499 +/- 132 B-3

TABLE B-I.1 SAMPLES COLLECTED AS PART OF THE RADIOLOGICAL GROUNDWATER COLLECTION SITE DATE Sr-89 Sr-90 CONCENTRATIONS OF TRITIUM AND STRONTIUM IN GROUNDWATER PROTECTION PROGRAM, PEACH BOTTOM ATOMIC POWER STATION, 2021 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA H-3 MW-PB-28 01/20/21 3690 +/- 429 MW-PB-28 01/28/21 4100 +/- 462 MW-PB-28 02/04/21 4780 +/- 542 MW-PB-28 02/11/21 6130 +/- 670 MW-PB-28 02/17/21 8810 +/- 931 MW-PB-28 02/23/21 4110 +/- 478 MW-PB-28 03/02/21 5860 +/- 636 MW-PB-28 03/09/21 4050 +/- 463 MW-PB-28 03/16/21 12200 +/- 1280 MW-PB-28 03/17/21 11000 +/- 1160 MW-PB-28 03/23/21 9730 +/- 1040 MW-PB-28 03/30/21 5310 +/- 595 MW-PB-28 04/06/21 7820 +/- 842 MW-PB-28 04/13/21 11200 +/- 1170 MW-PB-28 04/20/21 8300 +/- 888 MW-PB-28 04/27/21 11500 +/- 1210 MW-PB-28 05/04/21 7840 +/- 839 MW-PB-28 05/11/21 5520 +/- 616 MW-PB-28 05/18/21 5650 +/- 629 MW-PB-28 05/25/21 1500 +/- 223

< 7.9

< 1.0 MW-PB-28 06/02/21 2100 +/- 277 MW-PB-28 06/08/21 2660 +/- 333 MW-PB-28 06/22/21 561 +/- 135 MW-PB-28 07/20/21 1860 +/- 253 MW-PB-28 08/19/21 447 +/- 137 MW-PB-28 11/05/21 312 +/- 135 MW-PB-28 12/08/21 297 +/- 118 MW-PB-29 02/25/21 272 +/- 118 MW-PB-29 05/27/21

< 193

< 5.2

< 0.8 MW-PB-29 08/19/21 198 +/- 112 MW-PB-29 12/08/21 544 +/- 143 MW-PB-30 02/25/21 365 +/- 122 MW-PB-30 05/27/21

< 189

< 5.8

< 0.8 MW-PB-30 08/19/21 188 +/- 113 MW-PB-30 12/08/21 743 +/- 155 MW-PB-31 02/25/21

< 172 MW-PB-31 02/25/21 DUP

< 178 MW-PB-31 02/25/21 GEL

< 114 MW-PB-31 05/27/21

< 190

< 7.1

< 0.8 MW-PB-31 08/19/21

< 169 MW-PB-31 12/08/21

< 187 U/2 YARD DRAIN 01/21/21 627 +/- 144 U/2 YARD DRAIN 05/24/21 244 +/- 125

< 7.8

< 0.9 U/2 YARD DRAIN 09/17/21 451 +/- 127 U/2 YARD DRAIN 12/16/21 226 +/- 105 U/3 YARD DRAIN 01/18/21 2850 +/- 344 U/3 YARD DRAIN 01/28/21 3680 +/- 424 U/3 YARD DRAIN 02/04/21 1720 +/- 244 U/3 YARD DRAIN 02/11/21 1600 +/- 226 U/3 YARD DRAIN 02/17/21 804 +/- 153 U/3 YARD DRAIN 02/23/21 593 +/- 145 U/3 YARD DRAIN 03/02/21 1150 +/- 179 U/3 YARD DRAIN 03/09/21 897 +/- 163 B-4

TABLE B-I.1 SAMPLES COLLECTED AS PART OF THE RADIOLOGICAL GROUNDWATER COLLECTION SITE DATE Sr-89 Sr-90 CONCENTRATIONS OF TRITIUM AND STRONTIUM IN GROUNDWATER PROTECTION PROGRAM, PEACH BOTTOM ATOMIC POWER STATION, 2021 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA H-3 U/3 YARD DRAIN 03/16/21 772 +/- 155 U/3 YARD DRAIN 03/23/21 518 +/- 138 U/3 YARD DRAIN 03/30/21 534 +/- 140 U/3 YARD DRAIN 04/06/21 646 +/- 144 U/3 YARD DRAIN 04/13/21 633 +/- 133 U/3 YARD DRAIN 04/20/21 420 +/- 130 U/3 YARD DRAIN 04/27/21 494 +/- 138 U/3 YARD DRAIN 05/04/21 623 +/- 141 U/3 YARD DRAIN 05/11/21 562 +/- 146 U/3 YARD DRAIN 05/18/21 469 +/- 137 U/3 YARD DRAIN 05/25/21 400 +/- 135

< 7.8

< 1.0 U/3 YARD DRAIN 06/02/21 339 +/- 127 U/3 YARD DRAIN 06/08/21 371 +/- 128 U/3 YARD DRAIN 06/22/21 406 +/- 131 U/3 YARD DRAIN 07/20/21 356 +/- 125 U/3 YARD DRAIN 08/19/21

< 194 U/3 YARD DRAIN 11/05/21 316 +/- 132 U/3 YARD DRAIN 12/09/21 367 +/- 133 B-5

TABLE B-I.2 COLLECTION SITE DATE Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 I-131 Cs-134 Cs-137 Ba-140 La-140 MW-PB-28 04/06/21

< 2

< 3

< 6

< 3

< 6

< 4

< 6

< 4

< 4

< 3

< 12

< 4 CONCENTRATIONS OF GAMMA EMITTERS IN GROUNDWATER SAMPLES COLLECTED AS PART OF THE RADIOLOGICAL GROUNDWATER PROTECTION PROGRAM, PEACH BOTTOM ATOMIC POWER STATION, 2021 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA B-6

TABLE B-I.3 COLLECTION SITE DATE Cm-243/244 Fe-55 Ni-63 MW-PB-8 05/25/21

< 154

< 5 MW-PB-10 05/25/21

< 79

< 5 MW-PB-15 05/25/21

< 114

< 5 MW-PB-16 05/25/21

< 51

< 4 MW-PB-19 05/26/21

< 90

< 4 MW-PB-20 05/27/21

< 137

< 5 MW-PB-25 05/25/21

< 0.13

< 0.03

< 0.11

< 0.17

< 0.14 0.93 +/- 0.33

< 0.13 0.44 +/- 0.21

< 51

< 5 MW-PB-26 05/25/21

< 153

< 5 MW-PB-27 05/25/21

< 73

< 5 MW-PB-28 05/25/21

< 78

< 4 MW-PB-29 05/27/21

< 163

< 4 MW-PB-30 05/27/21

< 188

< 4 MW-PB-31 05/27/21

< 104

< 5 U/2 YARD DRAIN 05/24/21

< 182

< 4 U/3 YARD DRAIN 05/25/21

< 76

< 5 CONCENTRATIONS OF HARD-TO-DETECTS IN GROUNDWATER SAMPLES COLLECTED AS PART OF THE RADIOLOGICAL GROUNDWATER PROECTION PROGRAM, PEACH BOTTOM ATOMIC STATION, 2021 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA Pu-238 Pu-239/240 Am-241 Cm-242 U-234 U-235 U-238 B-7

TABLE B-II.1 PEACH BOTTOM ATOMIC POWER STATION, 2021 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE H-3 SP-PB-1 05/27/21

< 186 SP-PB-1 12/08/21

< 198 SP-PB-2 05/26/21

< 189 SP-PB-2 12/08/21

< 185 CONCENTRATIONS OF TRITIUM IN SEEP SAMPLES COLLECTED AS PART OF THE RADIOLOGICAL GROUNDWATER PROTECTION PROGRAM, B-8

TABLE B-III.1 COLLECTION SITE DATE H-3 PB-P1 02/02/21

< 186 PB-P1 08/18/21 192 +/- 107 PB-P2 02/02/21

< 188 PB-P2 08/18/21

< 188 PB-P3 02/02/21

< 187 PB-P3 08/18/21 210 +/- 124 PB-P4 02/02/21

< 193 PB-P4 08/18/21

< 190 PB-P5 02/02/21

< 191 PB-P5 08/18/21

< 192 PB-P6 02/02/21 204 +/- 124 PB-P6 08/18/21

< 188 PB-P7 02/02/21

< 188 PB-P7 08/18/21

< 193 PB-P8 02/02/21

< 185 PB-P8 08/18/21

< 189 COLLECTED AS PART OF THE RADIOLOGICAL GROUNDWATER PROTECTION CONCENTRATIONS OF TRITIUM IN PRECIPITATION WATER SAMPLES RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA PROGRAM, PEACH BOTTOM ATOMIC POWER STATION, 2021 B-9

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