Text

Annual Radiological Environmental Operating Report, 1 January Through 31 December 2021
	ML22133A014
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Site:	Braidwood
Issue date:	05/31/2022
From:	; Teledyne Brown Engineering Environmental Services
To:	; Office of Nuclear Reactor Regulation
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ML22133A012	List: BW220029, Annual Radiological Environmental Operating Report, 1 January Through 31 December 2021; ML22133A013;
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Docket No:

50-456 50-457 BRAIDWOOD STATION UNIT 1 and UNIT 2 Annual Radiological Environmental Operating Report 1 January through 31 December 2021 Prepared By Teledyne Brown Engineering Environmental Services wr Exelon Generation+)

Braidwood Station Braceville, IL 60407 May 2022

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Table Of Contents I. Preface............................................................................................................................. 1 II. Summary and Conclusions................................................ *............................................. 8 Ill. Introduction................................................................................................................... 1 O A. Objectives of the REMP..................................................................................... 10 B. Implementation of the Objectives...................................................................... 1 O IV. Program Description.................................................................................................... 11 A. Sample Collection.............................................................................................. 11 B. Sample Analysis................................................................................................ 12 C. Data Interpretation............................................................................................. 13 D. Program Exceptions.......................................................................................... 14 E. Program Changes............................................................................................. 15 V. Results and Discussion................................................................................................ 16 A. Aquatic Environment......................................................................................... 16

1. Surface Water......................................................................................... 16

2. Public Water............................................................................................ 16

3. Ground/Well Water................................................................................. 17

4. Fish......................................................................................................... 17

5. Sediment................................................................................................. 18 B. Atmospheric Environment................................................................................. 19 1. Airborne.................................................................................................. 19

a. Air Particulates............................................................................. 19

b. Airborne Iodine............................................................................. 19 C. Terrestrial Environment..................................................................................... 20

1. Milk.......................................................................................................... 20

2. Food Products......................................................................................... 20 D. Ambient Gamma Radiation............................................................................... 20 E. Land Use Survey............................................................................................... 21 F. Errata Data......................................................................................................... 21 G. Summary of Results - Inter-laboratory Comparison Program.......................... 21

Appendix A Tables Table A-1 Appendix B Tables Table B-1 Table B-2 Figures Figure B-1 Figure B-2 Figure B-3 Appendix C Tables Table C-1.1 Table C-1.2 Table C-1.3 Table C-1.4 Table C-1.5 Table C-I1.1 Appendices Radiological Environmental Monitoring Report Annual Summary Radiological Environmental Monitoring Program Annual Summary for Braidwood Station, 2021 Location Designation, Distance & Direction, and Sample Collection &

Analytical Methods Radiological Environmental Monitoring Program - Sampling Locations, Distance and Direction, Braidwood Station, 2021 Radiological Environmental Monitoring Program - Summary of Sample Collection and Analytical Methods, Braidwood Station, 2021 Inner Ring and Other OSLO Locations of Braidwood Station, 2021 Fixed Air Sampling and Outer Ring OSLO Locations of Braidwood Station, 2021 Ingestion and Waterborne Exposure Pathway Sample Locations of Braidwood Station, 2021 Data Tables and Figures - Primary Laboratory Concentrations of Gross Beta in Surface Water Samples Collected in the Vicinity of Braidwood Station, 2021 Concentrations of Tritium in Surface Water Samples Collected in the Vicinity of Braidwood Station, 2021 Concentrations of Nickel-63 in Surface Water Samples Collected in the Vicinity of Braidwood Station, 2021 Concentrations of lron-55 in Surface Water Samples Collected in the Vicinity of Braidwood Station, 2021 Concentrations of Gamma Emitters in Surface Water Samples Collected in the Vicinity of Braidwood Station, 2021 Concentrations of Gross Beta in Public Water Samples Collected in the Vicinity of Braidwood Station, 2021 ii

Table C-I1.2 Concentrations of Tritium in Public Water Samples Collected in the Vicinity of Braidwood Station, 2021 Table C-I1.3 Concentrations of 1-131 in Public Water Samples Collected in the Vicinity of Braidwood Station, 2021 Table C-I1.4 Concentrations of Nickel-63 in Public Water Samples Collected in the Vicinity of Braidwood Station, 2021 Table C-I1.5 Concentrations of lron-55 in Public Water Samples Collected in the Vicinity of Braidwood Station, 2021 Table C-I1.6

Concentrations of Gamma Emitters in Public Water Samples Collected in the Vicinity of Braidwood Station, 2021 Table C-111.1 Concentrations of Tritium in Ground/Well Water Samples Collected in the Vicinity of Braidwood Station, 2021 Table C-II1.2 Concentrations of Gamma Emitters in Ground/Well Water Samples Collected in the Vicinity of Braidwood Station, 2021 Table C-IV.1 Concentrations of lron-55, Nickel-63 and Gamma Emitters in Fish Samples Collected in the Vicinity of Braidwood Station, 2021 Table C-V.1 Concentrations of.lron-55, Nickel-63 and Gamma Emitters in Sediment Samples Collected in the Vicinity of Braidwood Station, 2021 Table C-Vl.1 Concentrations of Gross Beta in Air Particulate Samples Collected in the Vicinity of Braidwood Station, 2021 Table C-Vl.2 Monthly and Yearly Mean Values of Gross Beta Concentrations in Air Particulate Samples Collected in the Vicinity of Braidwood Station, 2021 Table C-Vl.3 Concentrations of Gamma Emitters in Air Particulate Samples Collected in the Vicinity of Braidwood.Station, 2021 Table C-Vll.1 Concentrations of 1-131 in Air Iodine Samples Collected in the Vicinity of Braidwood Station, 2021 Table C-Vlll.1 Concentrations of 1-131 in Milk Samples Collected-in the Vicinity of Braidwood Station, 2021 Table C-Vlll.2 Concentrations of Gamma Emitters in Milk Samples Collected in the Vicinity of Braidwood Station, 2021 Table C-Vlll.3 Concentrations of Gamma Emitters in Grass Samples Collected in the Vicinity of Braidwood Station, 2021 Table C-IX.1 Concentrations of Gamma Emitters in Vegetation Samples Collected in the Vicinity of Braidwood Station, 2021 Table C-X.1 Quarterly OSLO Results for Braidwood Station, 2021 Table C-X.2 Mean Quarterly OSLO Results for the Inner Ring, Outer Ring, Other, Control, and Independent Spent Fuel Storage Installation (ISFSI)

Locations for Braidwood Station, 2021 iii

Table C-X.3 Figures Figure C-1 Figure C-2 Figure C-3 Figure C-4 Figure C-5 Figure C-6 Figure C-7 Figure C-8 Figure C-9 Figure C-10 Figure C-11 Figure C-12 Figure C-13 Figure C-14 Figure C-15 Figure C-16 Figure C-17 Summary of the Ambient Dosimetry Program for Braidwood Station, 2021 Surface Water - Gross Beta - Stations BD-10 and BD-25 (Control (C))

Collected in the Vicinity of Braidwood Station, 2000 - 2021 Surface Water - Gross Beta - Stations BD-38 and BD-40 Collected in the Vicinity of Braidwood Station, 2007 - 2021 Surface Water - Gross Beta - Stations BD-55 and BD-56 Collected in the Vicinity of Braidwood Station, 2007 - 2021 Surface Water - Tritium - Stations BD-10 and BD-25 (C) Collected in the Vicinity of Braidwood Station, 2000 - 2021 Surface Water - Tritium - Stations BD-38 and BD-40 Collected in the Vicinity of Braidwood Station, 2006 - 2021 Surface Water - Tritium - Stations BD-55 and BD-56 Collected in the Vicinity of Braidwood Station, 2007 - 2021 Public Water - Gross Beta - Station BD-22 Collected in the Vicinity of Braidwood Station, 2000 - 2021 Public Water - Tritium - Station BD-22 Collected in the Vicinity of Braidwood Station, 2000 - 2021 Ground/Well Water - Tritium - Stations BD-13 and BD-34 Collected in the Vicinity of Braidwood Station, 2000 - 2021 Ground/Well Water - Tritium - Stations BD-35 and BD-36 Collected in the Vicinity of Braidwood Station, 2000 - 2021 Ground/Well Water - Tritium - Station BD-37 Collected in the Vicinity of Braidwood Station, 2000 - 2021 Ground/Well Water -*Tritium - Stations BD-50 and BD-51 Collected in the Vicinity of Braidwood Station, 2007 - 2021 Ground/Well Water - Tritium - Stations BD-53 and BD-54 Collected in the Vicinity of Braidwood Station, 2007 - 2021 Air Particulate - Gross Beta - Stations BD-03 (C) and BD-06 Collected in the Vicinity of Braidwood Station, 2000 - 2021 Air Particulate - Gross Beta - Stations BD-19 and BD-20 Collected in the Vicinity of Braidwood Station, 2000 - 2021 Air Particulate - Gross Beta - Station BD-21 Collected in the Vicinity of Braidwood Station, 2000 - 2021 Air Particulate - Gross Beta - Stations BD-02 and BD-04 Collected in the Vicinity of Braidwood Station, 2005 - 2021 iv

Figure C-18 Appendix D Tables Table D-1 Table-D-2 Table D-3 Appendix E Appendix F Air Particulate - Gross Beta - Station BD-05 Collected in the Vicinity of Braidwood Station, 2005 - 2021 Inter-Laboratory Comparison Program Analytics Environmental Radioactivity Cross Check Program Teledyne Brown Engineering Environmental Services, 2021 DOE's Mixed Analyte Performance Evaluation Program (MAPEP)

Teledyne Brown Engineering Environmental Services, 2021 ERA Environmental Radioactivity Cross Check Program Teledyne Brown Engineering Environmental Services, 2021 Errata Data Annual Radiological Groundwater Protection Program Report (ARGPPR)

V

I.

Preface The following sections of the preface are meant to help define key concepts, provide clarity, and give context to the readers of this report.

Annual Reports The Nuclear Regulatory Commission (NRC) is the federal agency who has the role to protect public health and safety through the development of regulations governing nuclear power reactors and ensuring their compliance. As part of the many commitments Nuclear Power Plants have to the NRC to ensure this safety, they provide two reports annually to specifically address how the station's operation impacts the environment of local communities. The NRC then reviews these reports and makes them available to the public. The names of the reports are the Annual Radioactive Effluent Release Report (ARERR) and the Annual Radiological Environmental Operating. Report (ARE OR).

The ARERR reports the results of the sampling from the effluent release paths at the station analyzed for radioactivity. An effluent is a liquid or gaseous waste containing plant-related radioactive material emitted at the boundary of the facility.

The ARE OR reports the results of the samples obtained in the environment surrounding the station. Environmental samples include air, water, vegetation, and other sample types that are identified as potential pathways radioactivity can reach humans.

Graphic 1. Examples of Gaseous and Liquid Effluent Pathways Graphic 1 demonstrates some potential exposure pathways from Braidwood Nuclear Power Station. The ARERR and AREOR together ensure Nuclear Power Plants are operating in a manner that is within established regulatory commitments meant to adequately protect the public.

Understanding Radiation

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Generally radiation is defined as emitted energy in the form of waves or particles. If radiation has enough energy to displace electrons from an atom it is termed "ionizing", otherwise it is "non-ionizing". Non-Ionizing radiation includes light, heat given off from a stove, radiowaves and microwaves. Ionizing radiation occurs in atoms, particles too small for the eye to see. So, what are atoms and how does radiation come from them?

Graphic 2. Types of Radiation, from NASA Hubblesite The Electromagnetic Spectrum Wav*'-*h ln motors

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nuclei An atom is the smallest part of an element that maintains the characteristics of that element. Atoms are made up of three parts: protons, neutrons, and electrons.

Graphic 3. Structure of an Atom The number of protons in an atom determines the element. For example, a hydrogen atom will always have one proton while an oxygen atom will always have eight protons. The protons are clustered with the neutrons forming the nucleus at the center of the atom. Orbiting around the nucleus are the relatively small electrons.

Isotopes are atoms that have the same number of protons but different numbers of neutrons. Different isotopes of an element will all have the same chemical properties and many isotopes are radioactive while other isotopes are not radioactive. A radioactive isotope can emit radiation because it contains excess energy in its nucleus. Radioactive atoms and isotopes are also referred to as radionuclides and radioisotopes.

There are two basic ways that radionuclides are produced at a nuclear power plant.

The first is fission, which creates radionuclides that are called fission products.

Fission occurs when a very large atom, such as uranium-235 (U-235) or plutonium-239 (Pu-239), absorbs a neutron into its nucleus making the atom unstable. The unstable atom can then split into smaller atoms. When fission occurs there is a large amount of energy released, in the form of heat. A nuclear power plant uses the heat generated to boil water that spins turbines to produce electricity.

The second way a radionuclide is produced at a nuclear power plant is through a process called activation. Radionuclides produced in this method are termed activation products. Pure water that passes over the fissioning atoms is used to cool the reactor and also produce steam to turn the turbines. Although this water is considered to be very pure, there are always some contaminants within the water from material used in the plant's construction and operation. These contaminants are exposed to the fission process and may become activation products. The atoms in the water itself can also become activated and create radionuclides.

Over time, radioactive atoms will reach a stable state and no longer be radioactive.

To do this they must release their excess energy. This release of excess energy is called radioactive decay. The time it takes for a radionuclide to become stable is measured in units called half-lives. A half-life is the amount of time it takes for half of the original radioactivity to decay. Each radionuclide has a specific half-life. Some half-lives can be very long and measured in years while others may be very short and measured in seconds.

1000 800 Activity 600 400 200 0

l half-life Graphic 4. Radioactive Decay Half-Life Half-life The amount of time it takes for half of the original radioactivity to decay 3 half-lives 4 half-lives In the annual reports you will see both man-made and naturally-ocurring radionuclides listed, for example potassium-40 (K-40, natural) and cobalt-60 (Co-60, man-made). We are mostly concerned about man-made radionuclides because they can be produced as by-products when generating electricity at a nuclear power plant. It is important to note that there are also other ways man-made radionuclides are produced, such as detonating nuclear weapons. Weapons testing has deposited some of the same man-made radionuclides into the environment as those generated by nuclear power, and some are still present today because of long half-lives.

Measuring Radiation There are four different but interrelated units for measuring radioactivity, exposure, absorbed dose, and dose equivalent. Together, they are used to scientifically report the amount of radiation and its effects on humans.

Radioactivity refers to the amount of ionizing radiation released by a material.

The units of measure for radioactivity used within the AREOR and ARERR are the Curie (Ci). Sniall fractions of the Ci often have a prefix, such as the microCurie (µCi), which means 1/1,000,000 of a Curie.

Exposure describes the amount of radiation traveling through the air. The units of measure for exposure used within the AREOR and ARERR are the Roentgen (R). Traditionally direct radiation monitors placed around the site are measured milliRoentgen (mR), 1/1,000 of one R.

Absorbed dose describes the amount of radiation absorbed by an object or person. The units of measure for absorbed dose used within the AREOR and ARERR are the rad. Noble gas air doses are reported by the site are measured in millirad (mrad), 1 /1,000 of one rad.

Dose equivalent (or effective dose) combines the amount of radiation absorbed and the health effects of that type of radiation. The units used within the AREOR and ARERR are the Roentgen equivalent man (rem).

Regulations.require doses to the whole body, specific organ,.and direct radiation to be reported in millirem (mrem), 1/1,000 of one rem.

Sources of Radiation People are exposed to radiation every day of their lives and have been since the dawn of mankind. Some of this radiation is naturally occurring while some is man-made. There are many factors that will determine the amount of radiation individuals will be exposed to such as where they live, medical treatments, etc. The average person in the United States is exposed to approximately 620 mrem each year. Half of this exposure, 310 mrem, comes from natural sources and the other half, 310 mrem, from man-made sources. Graphic 5 shows what the typical sources of radiation are for an individual over a calendar year:

Graphic 5. Sources of Radiation Exposure in the U.S., from NCRP Report No. 160 Sources of Radiation Exposure in the U.S.

Terrestrial (Soil) - 3%i l:ntemal-5%

I ndu stri al and Occupational

<0.1%

Consumer - 2%

Nuclear Medicine 12%

Ill Natural Sources - 50%

1111 Manmade Sources - 50%

~310 millirem {0.31: rem)

"* *, ~310 miHirem (Q.31 rem)

Source, NCRP Report Ne<, 160 (200Sl Full report is wailaole on the NCRP webs it" at www,NCRPonfine.org The radiation from a nuclear power plant is included in the chart as part of the "Industrial and Occupational" fraction, <0.1 %. The largest natural source of radiation is from radon, because radon gas travels in the air we breathe. Perhaps you know someone who had a CT scan at a hospital to check his or her bones, brain, or heart.

CT scans are included in the chart as "Medical Procedures" which make up the next largest fraction. Graphic 6 on the following page shows some of the common doses humans receive from radiation every year.

Graphic 6.Relative Doses from Radiation Sources, from EPA Radiation Doses and Sources RELATIVE DOSES FROM RADIATION SOURCES All dons f,om 111<1 National Council on Radiation Pn:11:e<:tion & Measu.-emeftts, Re;port No. 160 {unlen otherwln denot.d)

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Radiation Risk Current science suggests there is some risk from any exposure to radiation.

However, it is very hard to tell whether cancers or deaths can be attributed to very low doses of radiation or by something else. U.S. radiation protection standards are based on the premise that any radiation exposure carries some risk.

The following graph is an example of one study that tries to relate risk from many different factors. This graph represents risk as "Days of Lost Life Expectancy". All the categories are averaged over the entire population except Male Smokers, Female Smokers, and individuals that are overweight. Those risks are only for people that fall into those categories. The category for Nuclear Power is a government estimate based on all radioactivity releases from nuclear power, including accidents and wastes.

Graphic 7. Days of Lost Life Expectancy, Adapted from the Journal of American Physicians and Surgeons Volume 8 Number 2 Summer 2003 Smoking.. Men Hean Disea:..e Cancer Every 1.0 ibs ove-r..veight S.tn:eke Motor Vl?hide A\\:cident Air* Pollution I

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LB II.

Summary and Conclusions This report on the Radiological Environmental Monitoring Program (REMP) conducted for Exelon's Braidwood Station covers the period January 1, 2021, through December 31, 2021. During that time period 1,589 analyses were performed on 1,276 samples. In assessing all the data gathered for this report and comparing these results with preoperational data, it was concluded that the operation of Braidwood Station had no adverse radiological impact on the environment.

Surface, public, and ground/well water samples were analyzed for concentrations of tritium and gamma-emitting nuclides. Surface water and public water samples were also analyzed for concentrations of gross beta. Gross beta and tritium activities detected were consistent with those detected in previous years. No fission or activation products were detected. As part of an effort to implement industry best practices, both gaseous and liquid station effluents were evaluated for all 1 0CFR61 required nuclides. Nuclides exceeding 1 % relative abundance in the waste stream were added to the list of nuclides that Teledyne Brown evaluates in potentially impacted REMP matrices. For Braidwood Station, nickel-63 (Ni-63) exceeds 1 %

relative abundance in the radwaste resins. Occasionally, Ni-63 is observed in liquid release tank quarterly composites, therefore, beginning in the fall of 2013 the station requested that Ni-63 be evaluated in the downstream surface water, sediment, and fish analyses. Nickel-63 has not been observed in downstream surface water.

Fish (commercially and/or recreationally-important species) and sediment samples were analyzed for concentrations of gamma-emitting nuclides. No fission or activation products were detected in fish. Nickel-63 was not detected in any fish or sediment samples analyzed. No plant-produced fission or activation products were found in sediment.

Air particulate samples were analyzed for concentrations of gross beta and gamma-emitting nuclides. No fission or activation products were detected.

High sensitivity iodine-131 (1-131) analyses were performed on weekly air samples.

All results were less than the minimum detectable concentration for 1-131.

Cow milk samples were analyzed for concentrations of 1-131 and gamma-emitting nuclides. lodine-131 was not detected in any milk samples. Concentrations of naturally-occurring potassium-40 (K-40) were detected. No fission or activation products were found in any samples and all required LLDs (Lower Limit of Detection) were met.

Food Product samples were analyzed for concentrations of gamma-emitting nuclides. No fission or activation products were found in any samples and all required LLDs were met.

Environmental gamma radiation measurements were performed quarterly using Optically Stimulated Luminescence Dosimeters (OSLO). Beginning in 2012, Exelon changed the type of dosimetry used for the Radiological Environmental Monitoring Program (REMP). Optically Stimulated Luminescent Dosimetry were deployed and Thermo-luminescent Dosimetry (TLD) were discontinued. This change may result in a step change in readings, up or down, depending on site characteristics. The relative comparison to control locations remains valid. OSLO technology is different than that used in a TLD but has the same purpose (to measure direct radiation). A dose evaluation was performed by taking the highest readings at the ISFSI pad and extrapolating dose to the nearest resident. The dose to the nearest resident was estimated to be O.18 mrem in 2021.

Ill.

Introduction The Braidwood Station, consisting of two 3,645 MWt pressurized water reactors owned and operated by Exelon Corporation is located in Will County, Illinois. Unit No. 1 went critical on May 29, 1987. Unit No. 2 went critical on March 08, 1988.

The site is located in northeastern Illinois, 20 miles south-southwest of Joliet, Illinois, 60 miles southwest of Chicago and southwest of the Kankakee River.

This report covers those analyses performed by Teledyne Brown Engineering (TBE) and Landauer Technologies on samples collected during the period January 1, 2021, through December 31, 2021.

A.

Objectives of the REMP The objectives of the REMP are to:

1.

Pr.ovide data on measurable levels of radiation and radioactive materials in the site environs;

2.

Evaluate the relationship between quantities of radioactive material released from the plant and resultant radiation doses to individuals from principal pathways of exposure.

B.

Implementation of the Objectives The 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 Station-operation to assess Station radiological effects (if any) on man and the environment.

IV.

Program Description A.

Sample Collection Samples for the Braidwood Station REMP were collected for Exelon Nuclear by Environmental Inc. Midwest Labs (EIML). This section describes the general collection methods used by EIML to obtain environmental samples for the Braidwood Station REMP in 2021. Sample locations and descriptions can be found in Table B-1 and Figures B-1 through B-3, Appendix B. The sampling methods used by EIML are listed in Table B-2.

Aquatic Environment The aquatic environment was evaluated by performing radiological analyses on samples of surface water, public water, well water, fish, and sediment.

Two-gallon water samples were collected weekly from six surface water locations [BD-10, BD-25 (Control (C)), BD-38, BD-40, BD-55 and BD-56],

and one weekly composite sample of public drinking water at location (BD-

22) and ground/well water samples collected quarterly from eight locations (BD-13, BD-34, BD-35, BD-36, BD-37, BD-50, BD-51 and BD-54). All samples were collected in new plastic bottles, which were rinsed with source water prior to collection per procedure. Fish samples comprising the flesh of quillback, golden redhorse, flathead catfish, smallmouth bass, channel catfish, largemouth bass and common carp were collected semiannually at three locations, BD-25 (C), BD-28 and BD-41. Sediment samples composed of recently deposited substrate were collected at three locations semiannually, BD-10, BD-25 (C), and BD-57.

Atmospheric Environment The atmospheric environment was evaluated by performing radiological analyses on samples of air particulate and airborne iodine. Air particulate samples were collected and analyzed weekly at eight locations [BD-02, BD-03 (C), BD-04, BD-05, BD-06, BD-19, BD-20 and BD-21]. Airborne iodine and particulate samples were obtained at each location, using a vacuum pump with charcoal and glass fiber filters installed. The pumps were run continuously and sampled air at the rate of approximately one cubic foot per minute. The air particulate filters and air iodine cartridges were replaced weekly and sent to the laboratory for analysis.

Terrestrial Environment The terrestrial environment was evaluated by performing radiological analyses on food product samples. Food products and broad leaf vegetation*

were collected at six locations (BO-Control, BO-Quad 1, BO-Quad 2, BO-Quad 3, BO-Quad 4, BWD-G1 and BWD-G2). Various types of samples were collected and placed in new unused plastic bags and sent to the laboratory for analysis.

Ambient Gamma Radiation Beginning in 2012, Exelon changed the type of dosimetry used for the Radiological Environmental Monitoring Program (REMP). Optically Stimulated Luminescent Dosimeters (OSLO) were deployed and the use of Thermoluminescent Dosimeters (TLD) was discontinued. This change may result in a step change in readings, up or down, depending on site characteristics. The relative comparison to control locations remains valid.

OSLO technology is different than that used in a TLD but has the same purpose (to measure direct radiation).

Each location consisted of two OSLDs. The OSLDs were exchanged quarterly and sent to Landauer for analysis. The OSLDs were placed at locations on and around the Braidwood Station site as follows:

An inner ring consisting of sixteen locations (BD-101, BD-102, BD-103, BD-104, BD-105, BD-106, BD-107, BD-108, BD-109, BD-110, BD-111a, BD-112, BD-113a, BD-114, BD-115 and BD-116) at or near the site boundary.

An outer ring consisting of sixteen locations (BD-201, BD-202, BD-203, BD-204, BD-205, BD-206, BD-207, BD-208, BD-209, BD-210, BD-211, BD-212, BD-213, BD-214, BD-215 and BD-216) extending to approximately 5 miles from the site.

An additional set located at the eight fixed air sampling locations (BD-02, BD-3 (C), BD-04, BD-05, BD-06, BD-19, BD-20 and BD-21 ).

An ISFSI set consisting of six locations (BD-ISFSl-104-3, BD-ISFSl-104-4, BD-ISFSl-105-3, BD-ISFSl-105-4, BD-ISFSl-110-3 and BD-ISFSl-110-4).

The specific OSLO locations were determined by the following criteria:

1. The presence of relatively dense population;

2.

Site meteorological data taking into account distance and elevation for each of the sixteen-22 1 /2 degree sectors around the site;

3.

Where estimated annual dose from Braidwood Station, if any, would be most significant.

B.

Sample Analysis This section describes the general analytical methodologies used by TBE to analyze the environmental samples for radioactivity for the Braidwood Station REMP in 2021. The analytical procedures used by the laboratories are listed in Table B-2.

In order to achieve the stated objectives, the current program includes the following analyses:

1.

Concentrations of beta emitters in public and surface water and air particulates.

2.

Concentrations of gamma emitters in public, ground/well and surface water, air particulates, milk, grass, fish, sediment and food products.

3.

Concentrations of tritium in public, ground/well and surface water.

4.

Concentrations of 1-131 in air, milk and public water.

5.

Concentrations of Ni-63 in surface water, fish and sediment.

6.

Ambient gamma radiation levels at various site environs.

C.

Data Interpretation The radiological and direct radiation data collected prior to Braidwood Station becoming operational were used as a baseline with which these operational data were compared. For the purpose of this report, Braidwood Station was considered operational at initial criticality. In addition, data was compared to previous years' operational data for consistency and trending. Several factors were important in the interpretation of the data:

1.

Lower Limit of Detection and Minimum Detectable Concentration The lower limit of detection (LLD) was 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 was intended as a before the fact estimate of a system (including instrumentation, procedure and sample type) and not as an after the fact criteria for the presence of activity. All analyses were designed to achieve the required Braidwood Station detection capabilities for environmental sample analysis.

The MDC is the smallest concentration of radioactive material in a sample that will yield a net count, above system background, that will be detected with 95% probability with only 5% probability of falsely concluding that a blank observation represents a "real" signal. The MDC is an a posteriori determination.

2.

Net Activity Calculation and Reporting of Results Net activityfor a sample was calculated by subtracting background activity from the sample activity. Since the REMP measures extremely small changes in radioactivity in the environment, background variations may result in sample activity being lower than the background activity resulting in a negative number. An MDC was reported in all cases where positive* activity was not detected.

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

For surface water, public water, ground/well water, air particulate/radioiodine, milk, vegetation and fish, twelve nuclides, Mn-54, Co-58, Fe-59, Co-60, Zn-65, Nb-95, Zr-95, 1-131, Cs-134, Cs-137, Ba-140 and La-140 were reported.

For sediment, eleven nuclides, Mn-54, Co-58, Fe-59, Co-60, Zn-65, Nb-95, Zr-95, Cs-134, Cs,.137, Ba-140 and La-140 were reported.

Means and standard deviations of the results were calculated. The standard deviations represent the variability of measured results for different samples rather than the single analysis uncertainty.

D.

Program Exceptions For 2021, the Braidwood Station REMP had a sample recovery rate in excess of 99%. Sample anomalies and missed samples are listed in the tables below:

Table D-1 LISTING OF SAMPLE ANOMALIES Sample Location Collection Reason Type Code Date Low reading of 71.6 hrs., possibly caused by a power outage.

APAI BD-02 01/20/21 NOTE: during the 01/28/21 collection, the timer indicated 192.5 hrs. -

expected time for the 8 days collection period.

Timer malfunctioned at 29.5 hrs. Pump appears to run during the AP/Al BD-02 02/04/21 entire period Timer exchanged. NOTE: during the collection on 02/11/21, the timer indicated correct reading of 174.9 hrs.

APAI BD-03 02/18/21 Timer indicates appr. 9.4 hrs. less than expected, possibly due to a power outage.

APAI BD-21 02/18/21 Station inaccessible due to unplowed snow on the access road.

Station contacted, road cleared, sample collected on 02/19/21.

APAI BD-06 06/10/21 Timer indicates appr. 4.2 hrs. less than expected, probably due to a power outage.

APAI BD-06 06/17/21 Timer indicates lower reading of 156.3 hrs., probably due to a power outage caused by severe thunderstorms in the area.

VE (Ml)

BWD-G1 06/17/21 Only 2 different kinds of vegetables collected. Growth season delayed by cold weather.

VE (Ml)

BWD-G2 06/17/21 Only 1 kind of vegetable collected. Growth season delayed by cold weather.

VE (Ml)

Control 06/17/21 Only 1 kind of vegetable collected. Growth season delayed by cold weather.

AP/Al BD-06 06/24/21 Timer indicates lower reading of 145.0 hrs. The cause determined to

be a faulty timer. Timer exchanged.

VE (Ml)

Control 07/31/21 Only 2 different kinds of vegetables collected during July. Growth season delayed by cold weather.

VE (Ml)

Control 08/31/21 Only 2 different kinds of vegetables collected during August due to a crop failure.

3rd quarter composite sample was recreated using leftover monthly SW BD-55 09/30/21 gamma grab samples due to the original glass sample container being broken.

Air BD-06 10/28/21 Sampler indicates low Vmax. Pump replaced.

Sampler Timer indicates approx.. 4.9 hrs. less than expected, possibly due to a AP/Al BD-05 11/11/21 power outage. NOTE: during the 11/19/21 collection, the timer indicated 198.6 hrs. - expected value for the collection period.

In addition, to the preceding table, the initial 2021 OSLO dose readings were incorrect. For the 2nd, 3rd and 4th quarters, the 1st quarter deploy controls was used to calculate the normalized net dose. The deploy controls were not placed into the onsite vault for the appropriate time periods during the 2nd - 4th quarters.

Therefore, the dose readings were incorrect and 1st quarter deploy control doses were applied to the following three quarters. A new background vault rate was also calculated in 2021, and the quarterly readings were updated using the new rate of 0.08 mrem/day. (IR 04483926)

Sample Type M

SW SW SW SW SW OSLO Ml SW Table D-2 LISTING OF MISSED SAMPLES Location Collection Reason Code Date(s) 01/07/21 80-18 02/04/21 No sample; farmer stopped milking cows before calving season 03/04/21 80-55 01/07/21 No sample; lake frozen

- 03/04/21 80-56 01/07/21 No sample; lake frozen

- 02/25/21 80-10 01/28/21 No sample; lake frozen

- 02/25/21 80-25 01/28/21 No sample, location inaccessible due to snow accumulation

- 03/04/21 80-38 02/11/21 No samp_le; lake frozen 02/18/21 The holder with OSLO samples found missing, possibly due to 80-104 03/04/21 vandalism or snow-removing activity. Premises searched unsuccessfully. Samples EX 00070546N and EX 00069802M installed on 03/05/21.

80-18 06/03/21 No sample, very limited milk production 06/17/21 80-25 10/28/21 No sample; area flooded, access restricted 11/04/21 Each program exception was reviewed to understand the causes of the program exception. Sampling and maintenance issues were reviewed with the personnel involved to prevent recurrence. Occasional equipment breakdowns, power outages and weather related issues were unavoidable.

The overall sample recovery rate indicates that the appropriate procedures and equipment are in place to assure reliable program implementation.

E.

Program Changes There were no program changes in 2021.

V.

Results and Discussion A.

Aquatic Environment

1.

Surface Water (SW)

Samples were taken weekly and composited monthly at six locations (BD-10, BD-25 (C), BD-38, BD-40, BD-55 and BD-56). Of these locations, only BD-10 could be affected by Braidwood Station's effluent releases as it is downstream of the NPDES-permitted outfall. The following analyses were performed:

Gross Beta Samples from all locations were analyzed for concentrations of gross beta (Table C-1.1, Appendix C). Gross beta was detected in 53 of 66 samples. The values-ranged from 2.1 to 13.7 pCi/L. Concentrations detected were consistent with those detected in previous years.

(Figures C-1 through C-3, Appendix C)

Tritium Quarterly composites of weekly collections were analyzed for tritium activity (Table C-1.2, Appendix C). Tritium activity was detected in 1 of 24 samples at a concentration of 352 +/- 122 pCi/L. Concentrations detected were consistent with those detected in previous years.*

(Figures C-4 through C-6, Appendix C)

Nickel-63 Monthly samples were analyzed for Ni-63 activity. Ni-63 was not detected and the required LLD was met. (Table C-1.3, Appendix C) lron-55 Monthly samples were analyzed for Ni-63 activity. Fe-55 was not detected and the required LLD was met. (Table C-I.4, Appendix C)

Gamma Spectrometry

_ Samples from all locations were analyzed for gamma emitting nuclides.

No nuclides were detected and all required LLDs were met.

(Table C-1.4, Appendix C)

2.

Public Water (PW)

Monthly composites of weekly samples were made at one location (BD-22). This location could be affected by Braidwood Station's effluent releases. The following analyses were performed:

Gross Beta Samples from the location were analyzed for concentrations of gross beta (Tables C-I1.1, Appendix C). Gross beta was detected in 9 of 12 samples. The values ranged from 2.5 to 5.5 pCi/L. Concentrations detected were consistent with those detected in previous years.

(Figure C-7, Appendix C)

Tritium Monthly composites of weekly samples from BD-22 were analyzed for tritium activity (Table C-I1.2, Appendix C). Tritium was detected in 11 of 12 samples. Concentrations ranged from 235 to 2,210 pCi/L.

Concentrations detected were consistent with those detected in previous years (Figure C-8, Appendix C).

Iodine Monthly composites of weekly samples from the location were analyzed for 1-131. Iodine was not detected in any samples and the required LLD was met. (Table C-I1.3, Appendix C)

Nickel-63 Monthly samples were analyzed for Ni-63 activity. Ni-63 was not detected and the required LLD was met. (Table C-I1.4, Appendix C) lron-55 Monthly samples were analyzed for Fe-55 activity. Fe-55 was not detected and the required LLD was met. (Table C-I1.5, Appendix C)

Gamma Spectrometry Samples from the location were analyzed for gamma emitting nuclides.

No nuclides were detected and all required LLDs were met.

(Tabie C-I1.6, Appendix C)

3.

Ground/Well Water (WW)

Quarterly samples were collected at eight locations (BD-13, BD-34, BD-35, BD-36, BD-37, BD-50, BD-51 and BD-54). The following analyses were performed:

Tritium Quarterly grab samples from the locations were analyzed for tritium activity (Table C-II1.1, Appendix C). Tritium was not detected in any sample and the required LLD was met. Concentrations were consistent with those in previous years. (Figures C-9 through C-13, Appendix C)

Gamma Spectrometry Samples from all locations were analyzed for gamma emitting nuclides.

No nuclides were detected and all required LLDs were met.

(Table C-I1.3, Appendix C)

4.

Fish Fish samples comprising the flesh of shorthead redhorse, golden redhorse, smallmouth bass, common carp, largemouth bass and bluegill were collected at three locations (BD-25, BD-28, and BD-41) semiannually. Location BD-28 could be affected by Braidwood Station's effluent releases. The following analyses were performed:

lron-55 The edible portion of fish samples from all three locations was analyzed for Fe-55 activity. Fe-55 was not detected and the required LLD was met. (Table C-I1.3, Appendix C)

Nickel-63 The edible portion of fish samples from all three locations was analyzed for Ni-63 activity. Ni-63 was not detected and the required LLD was met.

(Table C-IV.1, Appendix C)

Gamma Spectrometry The edible portion of fish samples from all three locations was analyzed for gamma emitting nuclides. No fission or activation products were found. No nuclides were detected and all required LLDs were met.

(Table C-IV.1, Appendix C)

5.

Sediment (BS)

Aquatic sediment samples were collected at three locations (BD-10, BD-25 (C), and BD-57) semiannually. The locations at the Braidwood Station outfall to the Kankakee River (BD-57) and downstream of the outfall (BD-10), could be affected by Braidwood Station's efflue!lt releases. The following analyses were performed:

lron-55 Sediment samples from all three locations was analyzed for Fe-55 activity. Fe-55 was not detected and the required LLD was met.

(Table C-V.1, Appendix C)

Nickel-63 Sediment samples from all three locations was analyzed for Ni-63 activity. Ni-63 was not detected and the required LLD was met.

(Table C-V.1, Appendix C)

Gamma Spectrometry Sediment samples from the location were analyzed for gamma emitting nuclides. No fission or activation products were found and all required LLDs were met. (Table C-V.1, Appendix C)

B.

Atmospheric Environment

1.

Airborne (AP/Al)

a.

Air Particulates Continuous air particulate samples were collected from eight locations on a weekly basis. The eight locations were separated into three groups: Near field samplers (BD-06, BD-19, BD-20 and BD-21 ), far field samplers within 10 km of the site (BD-02, BD-04 and BD-05) and the Control sampler between 10 and 30 km from the site (BD-03). The following analyses were performed:

Gross Beta Weekly samples were analyzed for concentrations of beta emitters (Table C-Vl.1 and C-Vl.2, Appendix C). Detectable gross beta activity was observed at all locations. Comparison of results among the three groups aid in determining the effects, if any, resulting from the operation of Braidwood Station. The results from the near field (Group I) ranged from 6E-03 to 32E-03 pCi/m3 with a mean of 16E-03 pCi/m3. The results from the far field (Group II) ranged from 6E-03 to 34E-03 pCi/m3 with a mean of 16E-03 pCi/m3. The results from the Control location (Group Ill) ranged from 8E-03 to 31 E-03 pCi/m3 with a mean of 17E-03 pCi/m3. Comparison of the 2021 air particulate data with previous years' data indicate no effects from the operation of Braidwood Station. Additionally, a comparison of the weekly values for 2021 indicate no notable differences among the three groups. (Figures C-14 through C-18, Appendix C)

Gamma Spectrometry Weekly samples were composited quarterly and analyzed for gamma emitting nuclides. No nuclides were detected and all required LLDs were met. (Table C-Vl.3, Appendix C)

b.

Airborne Iodine Continuous air samples were collected from eight locations (BD-02, BD-03, BD-04, BD-05, BD-06, BD-19, BD-20 and BD-21) and analyzed weekly. The following analysis was performed:

1-131 Continuous air samples were collected from eight locations for 1-131.

All results were less than the minimum detectable concentration for 1-131. The required LLD was met for all analyses.

(Table C-Vll.1, Appendix C)

C.

Terrestrial Environment

1.

Milk (Ml)

Samples were collected from one location (control location BD-18) biweekly in May and monthly in March, October and November. The following analyses were performed:

lodine-131 Milk samples were analyzed for concentrations of 1-131. lodine-131 was not detected in any samples. All required LLDs were met.

(Table C-Vlll.1, Appendix C)

Gamma Spectrometry Each milk sample was analyzed for concentrations of gamma emitting nuclides. No nuclides were detected and all required LLDs were met.

(Table C-Vlll.2 & Table C-Vlll.3, Appendix C)

2.

Food Products (VE)

Food product samples were collected at eight locations: BO-Control, BO-Quad 1, BO-Quad 2, BO-Quad 3, BO-Quad 4, BWD-G1 and BWD-G2 when available. The following analysis was performed:

Gamma Spectrometry Samples from all locations were analyzed for gamma emitting nuclides.

No nuclides were detected and all required LLDs were met.

(Table C-IX.1, Appendix C)

D.

Ambient.Gamma Radiation Ambient gamma radiation levels were measured utilizing Optically Stimulated Luminescence Dosimeter (OSLO). Forty-eight OSLO locations were established around the site, each with two OSLD's installed for measurement. The data was analyzed using methods acceptable for demonstrating compliance with the Environmental Protection Agency (EPA) 40 CFR 190, "Environmental Radiation Protection Standards for Nuclear Power Operations". It incorporates the concepts of ANSI/HPS N13.37, "Environmental Dosimetry". Results of OSLO measurements are listed in Tables C-X.1 to C-X.3, Appendix C.

All OSLO measurements had a range of 12.8 to 38.0 mrem/std. quarter. A comparison of the Inner Ring, Outer Ring and Other data to the Control Location data, indicate that the ambient gamma radiation levels from all locations were similar.

Annual Facility Dose was reported for station BD-ISFSl-105-4. The direct dose to the nearest resident was estimated to be 0.18 mrem for the year.

E.

Land Use Survey F.

A Land Use Survey conducted during August 25, 2021, around the Braidwood Station was performed by EIML for Exelon Nuclear to comply with section 12.5.2 of the Braidwood Station's Offsite Dose Calculation Manual ODCM). The purpose of the survey was to document the nearest resident, milk-producing animal and garden of greater than 500 ft2 in each of the sixteen 22 1/2 degree sectors around the site. For dose calculation, a garden is assumed at the nearest residence. There were no notable changes to the 2021 land use census. The results of this survey are summarized below:

Distance in Miles from the Braidwood Station Reactor Buildings Sector Residence Livestock Milk Farm Miles Miles Miles A

N 0.50 2.6 B

NNE 0.88 C

NE 0.65 D

ENE 0.60 E

E 1.50 2.3 F

ESE 2.20 2.3 G

SE 2.70 2.7 H

SSE 4.50 J

s 4.20 K

SSW 4.00 5.3 L

SW 0.40 M

WSW 0.45*

N w

0.35 1.6 8.7 p

WNW 0.40 Q

NW 0.40 R

NNW 0.40 Errata Data There was no errata data for 2021 REMP.

G.

Summary of Results - Inter-Laboratory Comparison Program The TBE Laboratory analyzed Performance Evaluation (PE) samples of air particulate, air iodine, milk, soil, vegetation, and water matrices for various analytes. The PE samples supplied by Analytics Inc., Environmental Resource Associates (ERA) and Department of Energy (DOE) Mixed Analyte Performance Evaluation Program (MAPEP), were evaluated against the following pre-set acceptance criteria:

1.

Analytics Evaluation Criteria Analytics' evaluation report provides a ratio of TS E's result and Analytics' known value. Since flag values are not assigned by Analytics, TSE evaluates the reported ratios based on internal QC requirements based on the DOE MAPEP criteria.

2.

ERA Evaluation Criteria ERA's evaluation report provides an acceptance range for control and warning limits with associated flag values. ERA's acceptance limits are established per the USEPA, National Environmental Laboratory

.Accreditation Conference (NELAC), state-specific Performance Testing (PT) program requirements or ERA's SOP for the Generation of Performance Acceptance Limits, as applicable. The acceptance limits are either determined by a regression equation specific to each analyte or a fixed percentage limit promulgated under the appropriate regulatory document.

3.

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

Acceptable (flag = "A") - result within +/- 20% of the reference value

Acceptable with Warning (flag = "W") - result falls in the +/- 20%

to +/- 30% of the reference value

Not Acceptable (flag = "N") - bias is greater than 30% of the reference value Note: The Department of Energy (DOE) Mixed Analyte Performance Evaluation Program (MAPEP) samples are created to mimic conditions found

at DOE sites which do not resemble typical environmental samples obtained at commercial nuclear power facilities.

For the TSE laboratory, 146 out of 154 analyses performed met the specified acceptance criteria. Seven analyses did not meet the specified acceptance criteria for the following reasons and were addressed through the TSE Corrective Action Program. A summary is found below:

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 Sq/sample and the known result was 1.77 Sq/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 Sq/sample, within the acceptable range. Because TSE 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-63was 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. TBE's internal QC acceptance is 70% - 130%, while ERA's for this sample was 87% - 110%. All QA was reviewed with no 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)

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

Intentionally left blank

APPENDIX A RADIOLOGICAL ENVIRONMENTAL MONITORING REPORT ANNUAL

SUMMARY

Intentionally left blank

TABLEA-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR BRAIDWOOD STATION, 2021 NAME OF FACILITY: BRAIDWOOD DOCKET NUMBERS:

50-456 & 50-457 LOCATION OF FACILITY: BRACEVILLE, IL REPORTING PERIOD:

2021 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)

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

MEAN(M)

STATION#

NONROUTINE (UNITOF ANALYSIS ANALYSIS OF DETECTION (F)

(F)

NAME REPORTED MEASUREMENT)

PERFORMED PERFORMED (LLD)

RANGE RANGE RANGE DISTANCE AND DIRECTION MEASUREMENTS SURFACE WATER GR-8 66 4

6 4.3 9

BD-40 INDICATOR 0

(PC/ILITER)

(44/55)

(9/11)

(12/12)

BRAIDWOOD STATION COOLING LAKE 2.1-13.7 2.6-6.1 5.2-13.7 ONSITE H-3 24 200 352

<LLD 352 BD-56 INDICATOR 0

(1/20)

(1/4)

SOUTH POND FATLAN SITE 0.6 Ml NE OF SITE Nl-63 22 30

<LLD

<LLD 0

FE-55 22 200

<LLD

<LLD 0

GAMMA 66

)>

MN-54 15

<LLD

<LLD 0

I

,..\\,

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

/-131 15

<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

PUBLIC WATER GR-8 12 4

3.5 NA 3.5 BD-22 INDICATOR 0

(PCIILITER)

(9/12)

WILMINGTON 2.5-5.5 2.5-5.5 6.0 MILES NE OF SITE H-3 12 200 1007 NA 1007 BD-22 INDICATOR 0

(11/12)

WILMINGTON 235-2210 235-2210 6.0 MILES NE OF SITE 1-131 12 1

<LLD NA 0

Nl-63 12 30

<LLD

<LLD 0

FE-55 12 200

<LLD

<LLD 0

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

TABLEA-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR BRAIDWOOD STATION, 2021 NAME OF FACILITY: BRAIDWOOD DOCKET NUMBERS:

50-456 & 50-457 LOCATION OF FACILITY: BRACEVILLE, IL REPORTING PERIOD:

2021 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)

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

MEAN(M)

MEAN (M)

STATION#

NONROUTINE (UNITOF ANALYSIS ANALYSIS OF DETECTION (F)

(F)

NAME REPORTED MEASUREMENT)

PERFORMED PERFORMED (LLD)

RANGE RANGE RANGE DISTANCE AND DIRECTION MEASUREMENTS PUBLIC WATER GAMMA 12 (PCIILITER)

MN-54 15

<LLD NA 0

CO-58 15

<LLD NA 0

FE-59 30

<LLD NA 0

CO-60 15

<LLD NA 0

ZN-65 30

<LLD NA 0

NB-95 15

<LLD NA 0

ZR-95 30

<LLD NA 0

CS-134 15

<LLD NA 0

CS-137 18

<LLD NA 0

)>

BA-140 60

<LLD NA 0

I I\\J LA-140 15

<LLD NA 0

GROUND WATER H-3 32 200

<LLD NA 0

{PCIILITER)

GAMMA 32 MN-54 15

<LLD NA 0

C0-58 15

<LLD NA 0

FE-59 30

<LLD NA 0

CO-60 15

<LLD NA 0

ZN-65 30

<LLD NA 0

NB-95 15

<LLD NA 0

ZR-95 30

<LLD NA 0

1-131 15

<LLD NA 0

CS-134 15

<LLD NA 0

CS-137 18

<LLD NA 0

BA-140 60

<LLD NA 0

LA-140 15

<LLD NA 0

FISH FE-55 12 260

<LLD

<LLD 0

(PCl!KG WET)

Nl-63 12 260

<LLD

<LLD 0

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

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR BRAIDWOOD STATION, 2021 NAME OF FACILITY: BRAIDWOOD DOCKET NUMBERS:

50-456 & 50-457 LOCATION OF FACILITY: BRACEVILLE, IL REPORTING PERIOD:

2021 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)

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

MEAN(M)

STATION#

NONROUTINE (UNITOF ANALYSIS ANALYSIS OF DETECTION (F)

(F)

NAME REPORTED MEASUREMENT)

PERFORMED PERFORMED (LLD)

RANGE RANGE RANGE DISTANCE AND DIRECTION MEASUREMENTS FISH GAMMA 12 (PCIIKG WE7J 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

NB-95 NA

<LLD

<LLD 0

ZR-95 NA

<LLD

<LLD 0

1-131 NA

<LLD

<LLD 0

)>

CS-134 130

<LLD

<LLD 0

I CS-137 150

<LLD

<LLD 0

w BA-140 NA

<LLD

<LLD 0

LA-140 NA

<LLD

<LLD 0

SEDIMENT FE-55 6

2000

<LLD

<LLD 0

(PCIJKG DRY)

Nl-63 6

260

<LLD

<LLD 0

GAMMA 6

MN-54 NA

<LLD

<LLD 0

CO-58 NA

<LLD

<LLD 0

FE-59 NA

<LLD

<LLD 0

CO-60 NA

<LLD

<LLD 0

ZN-65 NA

<LLD

<LLD 0

NB-95 NA

<LLD

<LLD 0

ZR-95 NA

<LLD

<LLD 0

CS-134 150

<LLD

<LLD 0

CS-137 180

<LLD

<LLD 0

BA-140 NA

<LLD

<LLD 0

LA-140 NA

<LLD

<LLD 0

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

TABLEA-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR BRAIDWOOD STATION, 2021 NAME OF FACILITY: BRAIDWOOD DOCKET NUMBERS:

50-456 & 50-457 LOCATION OF FACILITY: BRACEVILLE, IL REPORTING PERIOD:

2021 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)

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

MEAN(M)

STATION#

NONROUTINE.

(UNITOF ANALYSIS ANALYSIS OF DETECTION (F)

(F)

NAME REPORTED MEASUREMENT)

PERFORMED PERFORMED (LLD)

RANGE RANGE RANGE DISTANCE AND DIRECTION MEASUREMENTS AIR PARTICULATE GR-8 416 10 19 18 20 BD-02 INDICATOR 0

(E-3 PC/ICU.METER)

(364/364)

(52/52)

CUSTER PARK 6-42 7-39 7-36 5.0 MILES E OF SITE GAMMA 32 MN-54 NA

<LLD

<LLD 0

CO-58 NA

<LLD

<LLD 0

FE-59 NA

<LLD

<LLD 0

CO-60 NA

<LLD

<LLD 0

ZN-65 NA

<LLD

<LLD 0

)>

NB-95 NA

<LLD

<LLD 0

I ZR-95 NA

<LLD

<LLD 0

.i:,.

CS-134 50

<LLD

<LLD 0

CS-137 60

<LLD

<LLD 0

BA-140 NA

<LLD

<LLD 0

LA-140 NA

<LLD

<LLD 0

AIR IODINE GAMMA 416 (E-3 PC/ICU.METER) 1-131 70

<LLD

<LLD 0

MILK 1-131 5

1

<LLD

<LLD 0

(PCJILJTER)

GAMMA 5

MN-54 NA

<LLD

<LLD 0

CO-58 NA

<LLD

<LLD 0

FE-59 NA

<LLD

<LLD 0

CO-60 NA

<LLD

<LLD 0

ZN-65 NA

<LLD

<LLD 0

NB-95 NA

<LLD

<LLD 0

ZR-95 NA

<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

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

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR BRAIDWOOD STATION, 2021 NAME OF FACILITY: BRAIDWOOD DOCKET NUMBERS:

50-456 & 50-457 LOCATION OF FACILITY: BRACEVILLE, IL REPORTING PERIOD:

2021 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)

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

MEAN(M)

STATION#

NON ROUTINE (UNITOF ANALYSIS ANALYSIS OF DETECTION (F)

(F)

NAME REPORTED MEASUREMENT)

PERFORMED PERFORMED (LLD)

RANGE RANGE RANGE DISTANCE AND DIRECTION MEASUREMENTS GRASS GAMMA 0

(PCIIKG WE1)

MN-54 NA 0

CO-58 NA 0

FE-59 NA 0

CO-60 NA 0

ZN-65 NA 0

NB-95 NA 0

ZR-95 NA 0

CS-134 60 0

)>

CS-137 60 0

I BA-140 80 0

(11 LA-140 NA 0

NA 0

VEGETATION GAMMA 128 (PCIIKG WE1)

MN-54 NA

<LLD

<LLD 0

CO-58 NA

<LLD

<LLD 0

FE-59 NA

<LLD

<LLD 0

CO-60 NA

<LLD

<LLD 0

ZN-65 NA

<LLD

<LLD 0

NB-95 NA

<LLD

<LLD 0

ZR-95 NA

<LLD

<LLD 0

1-131 60

<LLD

<LLD 0

CS-134 60

<LLD

<LLD 0

CS-137 80

<LLD

<LLD 0

BA-140 NA

<LLD

<LLD 0

LA-140 NA

<LLD

<LLD 0

DIRECT RADIATION OSLD-QUARTERL Y 183 NA 17.5 17.8 31.7 BD-ISFSl-105-4 INDICATOR 0

(MILLIREMIQTR.)

(1791179)

(4/4)

(4/4) 12.8-38.0 15.7 -18.9 15.9-38.0 0.20 MILES SE (M) The Mean Values are calculated using the positive values. (F) Fraction of detectable measurement are indicated in parentheses.

Intentionally left blank

APPENDIX B LOCATION DESIGNATION, DISTANCE & DIRECTION, AND SAMPLE COLLECTION & ANALYTICAL METHODS

TABLE B-1:

Radiological Environmental Monitoring Program - Sampling Locations, Distance and Direction, Braidwood Station, 2021 Location A. Surface Water BD-10 BD-25 BD-38 BD-40 BD-55 BD-56 B.

Drinking (Potable) Water BD-22 C.

Ground/Well Water BD-13 BD-34 BD-35 BD-36 BD-37 BD-50 BD-51 BD-54 D.

Milk - Bi-Weekly/ Monthly BD-18 E.

Air Particulates / Air Iodine BD-02 BD-03 BD-04 BD-05 BD-06 BD-19 BD-20 BD-21 F.

Fish BD-25 BD-28 BD-41 G.

Sediment BD-10 BD-25 BD-57 H.

Food Products BWD-G1 BWD-G2 Quadrant 1 Quadrant 2 Quadrant 3 Quadrant 4 Control Location Description Kankakee River Downstream (indicator)

Kankakee River Upstream (control)

Main Drainage Ditch (indicator)

Braidwood Station Cooling Lake (indicator)

North Pond Fatlan Site (indicator)

South Pond Fatlan Site (indicator)

Wilmington (indicator)

Braidwood City Hall Well (indicator)

Gibson Well (indicator)

Joly Well (indicator)

Hutton Well (indicator)

Nurczyk Well (indicator)

Skole Well (indicator)

Fatlan Well (indicator)

Cash Well (indicator)

Biros' Farm (control)

Custer Park (indicator)

County Line Road (control)

Essex (indicator)

Gardner (indicator)

Godley (indicator)

Nearsite NW (indicator)

Nearsite N (indicator)

Nearsite NE (indicator)

Kankakee River, Upstream (control)

Kankakee River, Discharge (indicator)

Cooling Lake (indicator)

Kankakee River, Downstream (indicator)

Kankakee River Upstream (control)

Circulating Water Slowdown Discharge (indicator)

Nearsite NE Nearsite W Clark Farm W. F. Soltwisch Terri Schultz Bruce Sinkular Gorman Farm Distance & Direction From Site 5.4 miles NE 9.6 miles E 1.5 miles SE Onsite (1.0 mile E) 0.6 miles NE 0.6 miles NE 6.0 miles NE 1.7 miles NNE 4.7 miles E 4.7 miles E 4.7 miles E 4.7 miles E 4.7 miles E 0.6 miles NE 0.9 miles NE 8.7 miles W 5.0 miles E 6.2 miles ESE 4.8 miles SSE 5.5 miles SW 0.5 miles WSW 0.3 miles NW 0.6 miles N 0.5 miles NE 9.6 miles E 5.4 miles E Onsite (1.0 mile E) 5.4 miles NE 9.6 miles E 5.4 miles E 0.54 miles NE 0.21 miles W 3.8 miles ENE 4.5 miles SSE 4.8 miles SSW 1.9 miles NNW 9.0 miles NE

TABLE B-1:

Location Radiological Environmental Monitoring Program - Sampling Locations, Distance and Direction, Braidwood Station, 2021 Location Description Distance & Direction From Site I.

Environmental Dosimetry - OSLO Inner Ring BD-101 BD-102 BD-103 BD-104 BD-105 BD-106 BD-107 BD-108 BD-109 BD-110 BD-111a BD-112 BD-113a BD-114 BD0115 BD-116 Outer Ring BD-201 BD-202 BD-203 BD-204 BD-205 BD-206 BD-207 BD-208 BD-209 BD-210 BD-211 BD-212 BD-213 BD-214 BD-215 BD-216 Other BD-02 BD-03 BD-04 BD-05 BD-06 BD-19 BD-20 BD-21 ISFSI BD-ISFSl-104-3 BD-ISFSl-104-4 BD-ISFSl-105-3 BD-ISFSl-105-4 BD-ISFSl-110-3 BD-ISFSl-110-4 Custer Park (indicator) 13000 W. Road (control)

Essex (indicator)

Gardner (indicator)

Godley (indicator)

Nearsite NW (indicator)

Nearsite N (indicator)

Nearsite NE (indicator) 0.5 miles N 1.1 miles NNE 1.0 mile NE 0.7 miles ENE 2.2 miles E 2.5 miles ESE 3.2 miles SE 3.2 miles SSE 3.8miles S 2.8 miles SSW 1.4 miles SW 0.7 miles WSW 0.5 miles W 0.4milesWNW 0.3 miles NW 0.4 miles NNW 4.2 miles N 4.8 miles NNE 4.9 miles NE 4.3 miles ENE 4.0 miles E 4.5 miles ESE

_4.5 miles SE 4.5 miles SSE 4.8 miles S 5.3 miles SSW 4.8 miles SW 5.0 miles WSW 4.8 miles W 4.3 miles WNW 4.5 miles NW 4.0 miles NNW 5.0 miles E 6.2 miles ESE 4.8 miles SSE 5.5 miles SW 0.5 miles WSW 0.3 miles NW 0.6 miles N 0.5 miles NE 0.11 miles E 0.13rnilesE 0.23 miles SE 0.20 miles SE 0.18 miles SE 0.15 miles SE

N p

Q R

A B

C D

E F

G H

J K

L M

N p

Q R

TABLE B-1:

Sector WNW WNW NW NNW Radiological Environmental Monitoring Program - Sampling Locations, Distance and Direction, Braidwood Station, 2021 Distance in Miles from the Braidwood Station ISFSI Pad, 2021 Residence Miles 0.7 0.7 0.7 0.7 Distance in Miles from the Braidwood Station Reactor Buildings, 2020 Sector Residence Miles Livestock Miles Milk Farm Miles N

0.5 2.6 NNE 0.9 NE 0.7 ENE 0.8 3.3 E

1.5 2.3 ESE 2.2 2.3 SE 2.7 2.7 SSE 4.5 s

4.2 4.8 SSW 1.3 5.3 SW 0.4 1.2 WSW 0.5 w

0.4 1.6 8.7 WNW 0.4 NW 0.4 NNW 0.4

TABLE B-2:

Sample Medium Surface Water Surface Water Surface Water Surface Water Surface Water Drinking Water Drinking Water Drinking Water Drinking Water Drinking Water Drinking Water Ground/

Well Water Ground/

Well Water Fish Fish Fish Sediment Sediment Sediment Air Particulates Air Particulates Air Iodine Milk Milk Food Products OSLO Radiological Environmental Monitoring Program - Summary of Sample Collection and Analytical Methods, Braidwood Station, 2021 Analysis Sampling Method Analytical Procedure Number Gamma Monthly composite from weekly grab TSE, TBE-2007 Gamma-Emitting Radioisotope Analysis Spectroscopy samples Gross Beta Monthly composite from weekly grab TBE, TBE-2008 Gross Alpha and/or Gross Beta Activity samples in Various Matrices lron-55 Monthly composite from weekly grab TSE, TBE-2006 lron-55 Activity in Various Matrices samples Nickel-63 Monthly composite from weekly grab TSE, TBE-2013 Radionickel Activity in Various Matrices samples Tritium Quarterly composite from weekly grab TSE, TBE-2011 Tritium Analysis in Drinking Water by samples Liquid Scintillation Gamma Monthly composite from weekly TSE, TBE-2007 Gamma-Emitting Radioisotope Analysis Spectroscopy composite samples TSE. TSE-2023 Compositing of Samples Monthly composite from weekly TSE, TBE-2008 Gross Alpha and/or Gross Beta Activity Gross Beta in Various Matrices composite samples TSE. TBE-2023 Compositing of Samples Iodine Monthly composite from weekly TSE, TBE-2012 Radioiodine in Various Matrices composite samples TSE. TBE-2023 Compositing of Samples lron-55 Monthly composite from weekly grab TSE, TBE-2006 lron-55 Activity in Various Matrices samoles Nickel-63 Monthly composite from weekly grab TSE, TBE-2013 Radionickel Activity in Various Matrices samples Monthly composite from weekly TSE, TBE-2011 Tritium Analysis in Drinking Water by Tritium Liquid Scintillation composite samples TSE. TBE-2023 Compositing of Samples Gamma Quarterly grab sample TSE, TBE-2007 Gamma-Emitting Radioisotope Analysis Spectroscopy Tritium Quarterly grab sample TSE, TBE-2011 Tritium analysis in Drinking Water by Liquid Scintillation Gamma Semi-annual samples collected via TSE, TBE-2007 Gamma-Emitting Radioisotope Analysis Spectroscopy electro-shocking or other techniques lron-55 Semi-annual samples collected via TSE, TBE-2006 lron-55 Activity in Various Matrices electro-shocking or other techniques Nickel-63 Semi-annual samples collected via TSE, TBE-2013 Radionickel Activity in Various Matrices electroshocking or other techniques

-Gamma Semi-annual grab samples TBE-2007 Gamma-Emitting Radioisotope Analysis Spectroscopy lron-55 Semi-annual grab samples TSE, TBE-2006 lron-55 Activity in Various Matrices Nickel-63 Semi-annual grab samples TSE, TBE-2013 Radionickel Activity in Various Matrices Gross Beta One-week composite of continuous air TSE, TBE-2008 Gross Alpha and/or Gross Beta Activity sampling through glass fiber filter paper in Various Matric~s Gamma Quarterly composite of each station TSE, TBE-2007 Gamma-Emitting Radioisotope Analysis Spectroscopy TSE. TBE-2023 Compositing of Samples 1-131 Weekly composite of continuous air TSE, TBE-2007 Gamma-Emitting Radioisotope Analysis sampling through charcoal filter Gamma Bi-weekly grab sample May through TSE, TBE-2007 Gamma-Emitting Radioisotope Analysis Spectroscopy October. Monthly all other times 1-131 Bi-weekly grab sample May through TSE, TBE-2012 Radioiodine in Various Matrices October. Monthly all other times Gamma Grab samples during the growing season TSE, TBE-2007 Gamma-Emitting Radioisotope Analysis Spectroscopy Optically Stimulated Quarterly OSLDs comprised of two Luminescence Al2O3:C Landauer Incorporated Landauer Incorporated Dosimetrv elements.

Figure B-1 lnne, R;ng and °"'*' Osco locar;on, of Braidwood Station, 2021

Figure B-2 Fixed Air Sampling and Outer Ring OSLD Locations of Braidwood Station, 2021 Legend

~ 1. Braidwood Station 2 Outer Ring Dosimeters

3. i'lir Sampling Locations

N t

0 1

2 w w!

J 4

I 5 I Miles

.53 Braidwood Station *. "'°

UI Figure B-3 OFFSITE DOSE CALCULATION MANUAL BRAIDWOOD STATION FIGURE. 1 1*3 JNOESTION ANO WA T!mBO!OO! ~

PATHWAY SAMPLE UXA TIONS

W ate:r

Sediment e Fish

)( Milk Ingestion and Waterborne Exposure Pathway Sample Locations of Braidwood Station, 2021

APPENDIX C DATA TABLES AND FIGURES

Intentionally left blank

Table C-1.1 CONCENTRATIONS OF GROSS BETA IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2021 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION PERIOD BD-10 BD-25 BD-38 BD-40 BD-55 BD-56 01/07/21 - 01/28/21 4.9 +/- 1.9 3.7 +/- 1.7 8.0 +/- 2.3 7.4 +/- 2.3 (1)

(1) 02/04/21 - 02/25/21 (1)

(1)

< 3.4 5.2 +/- 2.5 (1)

(1) 03/04/21 - 03/25/21

< 2.1 2.6 +/- 1.7 3.2 +/- 1.9 6.6 +/- 2.3 2.1 +/- 1.4

< 2.3 04/01/21 - 04/29/21 3.1 +/- 1.9

< 2.8 5.4 +/- 2.5 9.4 +/- 3.2 3.4 +/- 1.7

< 2.9 05/06/21 - 05/27/21 4.7 +/- 2.0 4.6 +/- 2.0 5.2 +/- 2.7 8.8 +/- 2.9

< 2.4

< 3.0 06/03/21 - 06/24/21 3.3 +/- 1.8 4.1 +/- 1.9 4.2 +/- 2.0 8.7 +/- 2.4

< 2.2 3.9 +/- 1.9 07/01/21 - 07/29/21 6.1 +/- 2.1 6.1 +/- 2.1 6.9 +/- 2.7 12.5 +/- 3.2 3.1 +/- 1.6 3.4 +/- 1.9 08/05/21 - 08/26/21 4.6 +/- 1.9 3.5 +/- 1.7 5.6 +/- 2.0 6.5 +/- 2.2 3.0 +/- 1.6

< 2.3 09/02/21 - 09/30/21 3.4 +/- 1.9

< 2.7 7.6 +/- 2.9 13.7 +/- 3.3 2.4 +/- 1.6

< 2.6 10/07/21 - 10/28/21 8.3 +/- 2.2 6.1 +/- 2.1 7.4 +/- 2.5 7.3 +/- 2.3 3.9 +/- 1.6 3.4 +/- 1.8 11/04/21 - 11/26/21 5.6 +/- 2.2 5.4 +/- 2.2 9.0 +/- 2.9 12.8 +/- 3.3

< 2.4

< 2.8 12/02/21 - 12/30/21 4.7 +/- 1.9 3.0 +/- 1.8 8.1 +/- 2.5 9.5 +/- 2.7 3.8 +/- 1.6 2.9 +/- 1.8 MEAN +/- 2 STD DEV 5.0 +/- 2.5 5.0 +/- 1.1 7.6 +/- 6.6 8.7 +/- 4.4 4.0 +/- 1.6 4.3 +/- 1.1 Table C-1.2 CONCENTRATIONS OF TRITIUM IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2021 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION PERIOD BD-10 BD-25 BD-38 BD-40 BD-55 01/07/21 - 03/25/21

< 183

< 184

< 180

< 182 03/04/21 - 03/25/21

< 184 04/01/21 - 06/24/21

< 184

< 179

< 181

< 180

< 178 07/01/21 - 09/30/21

< 193

< 196

< 180

< 177

< 173 10/07/21 - 12/30/21

< 173

< 163

< 178

< 190

< 175 MEAN +/- 2 STD DEV THE MEAN AND TWO STANDARD DEVIATION ARE CALCULATED USING THE POSITIVE VALUES (1) SEE PROGRAM EXCEPTIONS FOR EXPLANATION C-1 BD-56

< 191

< 177

< 180 352 +/- 122 352 +/- 0

Table C-1.3 Table C-1.4 CONCENTRATIONS OF NICKEL-63 IN SURFACE WATER SAMPLES COLLECTED IN THE VACINITY OF BRAIDWOOD STATION, 2021 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION PERIOD BD-10 BD-25 01/07/21 - 01/20/21

< 17

< 18 03/11/21 - 03/25/21

< 4

< 4 04/01/21 - 04/29/21

< 23

< 24 05/06/21 - 05/27/21

< 29

< 30 06/03/21 - 06/24/21

< 19

< 19 07/01/21 - 07/29/21

< 20

< 21 08/05/21 - 08/26/21

< 16

< 17 09/02/21 - 09/30/21

< 19

< 19 10/07/21 - 10/21/21

< 18

< 18 11/11/21 - 11/26/21

< 25

< 26 12/02/21 - 12/30/21

< 19

< 19 MEAN CONCENTRATIONS OF IRON-55 IN SURFACE WATER SAMPLES COLLECTED IN THE VACINITY OF BRAIDWOOD STATION, 2021 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION PERIOD BD-10 BD-25 01/07/21 - 01/20/21

< 168

< 37 03/11/21 - 03/25/21

< 58

< 70 04/01/21 - 04/29/21

< 52

< 46 05/06/21 - 05/27/21

< 64

< 100 06/03/21 - 06/24/21

< 117

< 128 07/01/21 - 07/29/21

< 86

< 162 08/05/21 - 08/26/21

< 95

< 39 09/02/21 - 09/30/21

< 83

< 57 10/07/21 - 10/21/21

< 129

< 98 11/11/21 - 11/26/21

< 196

< 96 12/02/21 - 12/30/21

< 96

< 188 MEAN C-2

Table C-1.5 CONCENTRATIONS OF GAMMA EMITTERS IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2021 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE PERIOD Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 1-131 Cs-134 Cs-137 Ba-140 La-140 BD-10 01/07/21 - 01/20/21

< 4

<4

< 9

< 3

< 7

<4

< 7

< 10

< 4

< 23

< 8 02/04/21 - 02/25/21 (1) 03/04/21 - 03/25/21

< 3

< 6

< 3

< 5

< 3

< 5

< 10

< 3

< 20

< 6 04/01/21 - 04/29/21

< 7

< 5

< 12

< 7

< 12

< 7

< 13

< 7

< 6

< 32

< 14 05/06/21 - 05/27/21

<4

< 3

< 5

<4

< 8

< 5

< 11

< 13

< 5

< 32

< 9 06/03/21 - 06/24/21

< 2

< 4

< 2

< 3

< 2

< 3

< 8

< 2

< 15

< 5 07/01/21 - 07/29/21

< 2

< 5

< 2

< 5

< 2

<4

< 6

< 2

< 14

< 5 08/05/21 - 08/26/21

< 2

<4

< 2

< 4

< 2

< 4

< 8

< 2

< 16

< 5 09/02/21 - 09/30/21

< 7

< 5

< 12

< 5

< 9

<8

< 13

< 11

< 8

< 7

< 28

< 7 10/07/21 - 10/28/21

<4

< 4

< 9

< 5

< 7

< 6

< 8

< 13

< 6

< 28

< 10 11/04/21 - 11/26/21

< 8

< 7

< 13

< 8

< 19

< 8

< 9

< 8

< 6

< 33

< 11 12/02/21 - 12/30/21

< 5

< 12

<4

< 7

< 5

< 9

< 15

< 5

< 31

< 9 MEAN BD-25 01/07/21 - 01/20/21

< 5.

< 6

< 13

< 6

< 15

< 8

< 13

< 12

< 7

< 5

< 32

< 14 02/04/21 - 02/25/21 (1) 03/11/21 - 03/25/21

< 3

< 7

< 3

< 5

< 3

< 6

< 10

< 3

< 24

< 7

(')

04/01/21 - 04/29/21

< 6

< 14

< 5

< 12

< 7

< 11

< 14

< 5

< 36

< 8 I w 05/06/21 - 05/27/21

< 3

< 10

< 6

<.11

< 5

< 7

< 14

< 6

< 4

< 31

< 11 06/03/21 - 06/24/21

< 2

< 5

< 2

< 4

< 2

<4

< 9

<2

< 2

< 16

< 6 07/01/21 - 07/29/21

< 5

<4

< 10

< 6

< 9

< 7

< 9

< 10

< 5

< 26

< 11 08/05/21 - 08/26/21

< 2

<4

< 2

< 3

< 2

< 3

< 6

< 2

< 12

< 4 09/02/21 - 09/30/21

< 3

<4

< 9

< 7

< 10

< 4

< 10

< 9

< 5

< 6

< 23

< 8 10/07/21 - 10/21/21

< 2

< 4

< 2

< 4

< 2

< 4

< 9

< 2

< 17

< 5 11/11/21 - 11/26/21

< 5

< 12

< 6

< 11

< 6

< 10

< 5

< 6

< 29

< 13 12/02/21 - 12/30/21

< 4

<4

< 10

< 5

< 9

< 5

< 8

< 15

< 5

< 35

< 11 MEAN BD-38 01/07/21 - 01/28/21

< 8

< 7

< 14

< 6

< 13

< 6

< 10

< 8

< 34

< 10 02/04/21 - 02/25/21

< 4

< 9

<4

< 9

<4

< 8

< 6

< 5

< 18

< 7 03/04/21 - 03/25/21

< 2

< 5

< 2

< 4

< 2

<4

< 8

< 2

< 16

< 5 04/01/21 - 04/29/21

< 4

<4

< 11

< 5

< 10

<4

< 7

< 13

< 5

< 36

< 10 05/06/21 - 05/27/21

< 3

< 4

< 7

< 4

< 7

<4

< 6

< 9

< 3

< 23

< 7 06/03/21 - 06/24/21

< 2

<2

<4

< 2

<4

<2

< 4

< 8

< 2

< 15

< 6 07/01/21 - 07/29/21

< 3

<6

< 2

< 6

< 3

< 5

< 7

< 3

< 2

< 18

< 6 08/05/21 - 08/26/21

< 2

<4

< 2

< 3

< 2

< 3

< 6

< 2

< 13

< 5 09/02/21 - 09/30/21

<6

< 5

< 11

< 7

< 15

< 5

< 9

< 10

< 7

< 8

< 31

< 12 10/07/21 - 10/28/21

< 5

< 12

< 5

< 11

< 5

< 10

< 14

< 5

< 34

< 11 11/04/21 - 11/26/21

< 5

< 6

< 17

< 6

< 9

< 10

< 7

< 6

< 30

< 13 12/02/21 - 12/30/21

< 5

< 10

< 5

< 9

< 5

< 9

< 15

< 4

< 35

< 11 MEAN (1) SEE PROGRAM EXCEPTIONS FOR EXPLANATION

Table C-1.5 CONCENTRATIONS OF GAMMA EMITTERS IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2021 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE PERIOD Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 1-131 Cs-134 Cs-137 Ba-140 La-140 BD-40 01/07/21 - 01/28/21

< 6

< 8

<6

< 15

<4

< 14

< 7

< 6

< 25

< 12 02/04/21 - 02/25/21

< 4

<4

< 6

< 3

< 7

< 4

< 7

< 5

< 3

< 18

< 6 03/04/21 - 03/25/21

< 2

<4

< 2

< 3

< 2

< 3

< 8

< 2

< 15

< 5 04/01/21 - 04/29/21

< 7

< 8

< 16

< 7

< 13

< 6

< 11

< 14

< 6

< 37

< 10 05/06/21 - 05/27/21

< 3

< 4

< 8

< 3

< 6

< 3

< 7

< 13

<4

< 3

< 27

< 9 06/03/21 - 06/24/21

< 2

< 5

< 2

<4

< 2

< 4

< 9

< 2

< 16

< 6 07/01/21 - 07/29/21

< 2

<4

< 2

< 4

< 2

< 4

< 6

< 2

< 14

<4 08/05/21 - 08/26/21

< 2

<4

< 2

< 4

< 2

<4

< 7

< 2

<2

< 15

< 6 09/02/21 - 09/30/21

<5

< 4

< 10

< 6

< 12

<4

< 8

< 9

< 4

< 5

< 23

< 5 10/07/21 - 10/28/21

< 5

< 11

< 7.

< 10

< 5

< 8

< 11

< 4

< 5

< 33

< 8 11/04/21 - 11/26/21

< 5

< 6

< 13

< 6

< 12

< 6

< 12

< 11

< 7

< 30

< 9 12/02/21 - 12/30/21

< 4

< 5

< 10

< 5

< 9

< 5

< 8

< 15

<4

< 5

< 35

< 14 MEAN BD-55 01/07/21 - 01/28/21 (1) 02/04/21 - 02/25/21 (1) 03/11/21 - 03/25/21

< 3

< 7

< 3

< 5

< 3

< 5

< 9

< 3

< 20

< 7 0

04/01/21 - 04/29/21

< 6

< 7

< 13

< 5

< 10 I

< 7

< 13

< 12

< 8

< 6

< 28

< 10

.i:,.

05/06/21 - 05/27/21

< 5

< 11

< 5

< 10

< 6

< 7

< 14

< 5

< 35

< 12 06/03/21 - 06/24/21

< 1

< 3

< 1

< 3

< 1

< 3

<6

< 1

< 11

< 4 07/01/21 - 07/29/21

< 2

< 6

< 2

< 4

< 2

< 4

< 7

< 3

< 2

< 15

< 5 08/05/21 - 08/26/21

< 1

< 2

< 4

< 2

< 3

< 2

< 3

< 6

< 2

< 13

< 4 09/02/21 - 09/30/21

< 5

< 11

< 5

< 9

< 5

< 8

< 9

< 6

< 5

< 22

< 9 10/07/21 - 10/28/21

< 4

< 5

< 10

< 5

< 10

< 5

<7

< 13

< 5

< 4

< 28

< 9 11/04/21 - 11/26/21

<6

< 7

< 18

< 6

< 15

< 8

< 12

< 13

< 7

< 31

< 11 12/02/21 - 12/30/21

< 4

< 5

< 9

< 4

< 10

< 5

< 8

< 15

<4

< 5

< 31

< 10 MEAN BD-56 01/07/21 - 01/28/21 (1) 02/04/21 - 02/25/21 (1) 03/04/21 - 03/25/21

< 2

< 5

< 2

<4

< 2

<4

< 8

< 2

< 16

< 6 04/01/21 - 04/29/21

< 6

<4

< 13

< 7

< 9

< 5

< 11

< 14

<6

< 6

< 35

< 13 05/06/21 - 05/27/21

< 4

<4

<.7

< 4

< 7

< 5

< 7

< 11

< 5

<4

< 27

< 9 06/03/21 - 06/24/21

< 2

<4

< 2

<4

< 2

< 4

< 8

< 2

< 16

< 6 07/01/21 - 07/29/21

< 2

< 5

< 2

< 5

< 2

< 4

< 6

< 3

< 2

< 13

< 5 08/05/21 - 08/26/21

< 2

< 4

< 2

< 4

<2

< 3

< 8

< 2

< 15

<4 09/02/21 - 09/30/21

<4

< 6

< 9

< 5

< 11

< 6

< 9

< 6

< 25

< 8 10/07/21. - 10/28/21

< 6

< 14

< 7

< 11

< 7

< 10

< 15

< 7

< 5

< 33

< 14 11/04/21 - 11/26/21

< 7

< 6

< 15

< 6

< 12

< 6

< 11

< 13

< 7

< 6

< 29

< 12 12/02/21 - 12/30/21

< 5

< 13

< 5

< 9

< 7

< 9

< 15

< 5

<6

< 35

< 14 MEAN (1) SEE PROGRAM EXCEPTIONS FOR EXPLANATION

Table C-I1.1 Table C-I1.2 Table C-I1.3 CONCENTRATIONS OF GROSS BETA IN PUBLIC WATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2021 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION PERIOD BD-22 12131120 - 01128121 2.5 +/- 1.5 01128121 - 02125121

< 2.6 02125121 - 03125121 3.0 +/- 1.3 03125121 - 04129121 2.7 +/- 1.7 04129121 - 05127121 3.4 +/- 1.6 05127121 - 06124121

< 2.4 06124121 - 07129121 4.5 +/- 2.5 07129121 - 08126121

< 2.4 08126121 - 09130121 4.0 +/- 1.6 09130121 10128121 2.6 +/- 1.6 10128121 - 11126121 5.5 +/- 1.9 11126121 - 12130121 3.7 +/- 1.6 MEAN +/- 2 STD DEV 3.5 +/- 2.0 CONCENTRATIONS OF TRITIUM IN PUBLIC WATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2021 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION PERIOD BD-22 12131120 - 01128121 2210 +/- 291 01128121 - 02125121 1780 +/- 240 02125121 - 03125121 1920 +/- 267 03125121 - 04129121 962 +/- 170 04129121 - 05127121 315 +/- 129 05127121 - 06124121 235 +/- 119 06124121 - 07129121 416 +/- 133 07129121 - 08126121 1310 +/- 210 08126121 - 09130121 707 +/- 144 09130121 10128121 599 +/- 138 10128121 - 11126121

< 175 11126121 - 12130121 626 +/- 136 MEAN+/- 2 STD DEV 1007 +/- 1385 CONCENTRATIONS OF I-131 IN PUBLIC WATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2021 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION PERIOD BD-22 12131120 - 01128121

< 0.9 01128121 - 02125121

< 0.9 02125121 - 03125121

< 0.8 03125121 - 04129121

< 0.9 04129121 - 05127121

< 0.9 05127121 - 06124121

< 0.9 06124121 - 07129121

< 0.8 07129121 - 08126121

< 0.8 08126121 - 09130121

< 0.8 09130121 - 10128121

< 0.4 10128121 - 11126121

< 0.9 11126121 - 12130121

< 0.9

. MEAN THE MEAN AND TWO STANDARD DEVIATION ARE CALCULATED USING THE POSITIVE VALUES C-5

Table C-I1.4 CONCENTRATIONS OF NICKEL-63 IN PUBLIC WATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2021 RESULTS IN UNITS OF PC I/LITER+/- 2 SIGMA COLLECTION PERIOD BD-22 12/31/20 - 01/28/21

< 24 01/28/21 - 02/25/21

< 30 02/25/21 - 03/25/21

< 24 03/25/21 - 04/29/21

< 28 04/29/21 - 05/27/21

< 21 05/27/21 - 06/24/21

< 25 06/24/21 - 07/29/21

< 13 07/29/21 - 08/26/21

< 28 08/26/21 - 09/30/21

< 24 09/30/21 - 10/28/21

< 23 10/28/21 - 11/26/21

< 16 11/26/21 - 12/30/21

< 21 MEAN Table C-I1.5 CONCENTRATIONS OF IRON-55 IN PUBLIC WATER SAMPLES COLLECTED IN

.THE VICINITY OF BRAIDWOOD STATION, 2021 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION PERIOD BD-22 12/31/20 - 01/28/21

< 57 01/28/21 - 02/25/21

< 68 02/25/21 - 03/25/21

< 182 03/25/21 - 04/29/21

< 100 04/29/21 - 05/27/21

< 187 05/27/21 - 06/24/21

< 55 06/24/21 - 07/29/21

< 68 07/29/21 - 08/26/21

< 86 08/26/21 - 09/30/21

< 97 09/30/21 - 10/28/21

< 159 10/28/21 - 11/26/21

< 189 11/26/21 - 12/30/21

< 47 MEAN C-6

Table C-11.6 CONCENTRATIONS OF GAMMA EMITTERS IN PUBLIC WATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2021 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA 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 BD-22 12/31/20 - 01/28/21

<4

< 5

< 10

< 6

< 11

< 6

< 9

<6

< 5

< 27

< 13 01/28/21 - 02/25/21

< 4

< 11

< 6

< 10

< 6

< 10

< 6

< 21

< 9 02/25/21 - 03/25/21

< 2

<4

< 2

<4

< 2

<4

< 2

< 15

< 5 03/25/21 - 04/29/21

< 3

< 6

< 3

< 6

< 3

< 5

< 3

< 4

< 21

< 6 04/29/21 - 05/27/21

< 5

<4

< 10

< 5

< 8

<6

< 8

<4

< 5

< 27

< 9 05/27/21 - 06/24/21

. < 3

< 3

< 6

< 3

< 5

< 3

< 5

< 3

< 18

< 6 06/24/21 - 07/29/21

< 1

< 3

< 1

< 3

< 1

< 2

< 1

< 12

<4 07 /29/21 - 08/26/21

< 2

< 4

< 2

<4

< 2

< 3

< 2

< 17

< 5 08/26/21 - 09/30/21

< 5

< 4

< 12

< 5

< 9

< 5

< 7

< 5

< 6

< 24

< 11 09/30/21 - 10/28/21

<6

<4

< 10

< 5

< 11

< 7

< 10

< 6

< 7

< 31

< 14 10/28/21 - 11/26/21

< 5

< 4

< 10

< 5

<.10

< 4

< 8

<4

< 5

< 30

< 12 11/26/21 - 12/30/21

< 5

<6

< 11

< 6

< 9

< 6

< 9

< 6

< 5

< 36

< 12 C')

MEAN I

Table C-111.1 CONCENTRATIONS OF TRITIUM IN GROUND/WELL WATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2021 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION PERIOD BD-13 BD-34 BD-35 BD-36 BD-37 BD-50 BD-51 01/14/21 - 01/14/21

< 182

< 185

< 187

< 183

< 185

< 183 04/09/21 - 04/09/21

< 189

< 182

< 183

< 178

< 186

< 183 07/08/21 - 07/08/21

< 179

< 183

< 181

< 183 10/14/21 - 10/14/21

< 184

< 191

< 179

< 194

< 182

< 197

< 185 MEAN C-8 BD-54

< 182

< 190

< 180

< 178

Table C-111.2 CONCENTRATIONS O'F GAMMA EMITTERS IN GROUND/WELL WATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2021 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE PERIOD Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 1-131 Cs-134 Cs-137 Ba-140 La-140 BD-13 01/14/21 - 01/14/21

< 8

< 7

< 14

< 9

< 15

< 9

< 14

< 11

< 8

< 31

< 9 04/09/21 - 04/09/21

< 5

< 8

< 5

< 10

< 6

< 9

<6

< 6

< 4

< 18

< 9 07/08/21 - 07/08/21

< 7

< 13

< 7

< 15

< 7

< 10

< 9

< 8

< 7

< 33

< 10 10/14/21 - 10/14/21

< 5

< 10

< 5

< 9

< 5

< 8

< 6

< 5

< 20

< 8 MEAN BD-34 01/14/21 - 01/14/21

< 6

< 14

< 6

< 11

< 7

< 10

< 8

< 6

< 24

< 9 04/09/21 - 04/09/21

< 4

< 5

< 12

< 5

< 14

< 6

< 10

< 9

< 7

< 5

< 24

< 7 07/08/21 - 07/08/21

< 7

< 5

< 11

< 5

< 9

< 6

< 11

< 8

< 7

< 25

< 11 10/14/21 - 10/14/21

< 5

< 4

< 10

< 5

< 8

< 5

<"8

< 7

< 6

< 5

< 23

< 7 MEAN 0

I (0 BD-35 01/14/21 - 01/14/21

< 7

< 12

< 6

< 13

< 8

< 11

< 10

< 7

< 31

< 12 04/09/21 - 04/09/21

< 5

< 10

< 5

< 10

< 6

< 9

<6

< 5

< 20

< 9 07/08/21 - 07/08/21

< 7

< 5

< 15

< 6

< 14

< 7

< 11

< 8

<6

< 5

< 31

< 13 10/14/21 - 10/14/21

< 5

< 11

< 5

< 11

< 6

< 9

< 8

<6

< 6

< 28

< 8 MEAN BD-36 01/14/21 - 01/14/21

< 7

< 6

< 19

< 10

< 16

< 9

< 12

< 8

< 5

< 41

< 8 04/09/21 - 04/09/21

< 8

< 6

< 14

< 8

< 15

< 10

< 12

< 11

< 8

< 7

< 26

< 10 07/08/21 - 07/08/21

< 5

< 6

< 10

<6

< 11

< 6

< 9

< 8

< 5

< 6

< 23

< 9 10/14/21 - 10/14/21

< 6

< 13

< 8

< 20

< 6

< 11

< 9

< 7

< 25

< 11 MEAN BD-37 01/14/21 - 01/14/21

<4

< 6

< 9

< 5

< 13

< 7

< 8

< 5

< 22

< 10 04/09/21 - 04/09/21

< 5

< 10

< 5

< 9

< 6

< 10

< 7

< 6

< 20

< 10 07/08/21 - 07/08/21

< 5

< 6

< 11

< 6

< 11

< 7

< 13

< 9

< 7

< 6

< 25

< 8 10/14/21 - 10/14/21

< 5

< 11

< 5

< 9

< 8

< 10

< 6

< 5

< 22

< 10 MEAN

Table C-111.2 CONCENTRATIONS OF GAMMA EMITTERS IN GROUND/WELL WATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2021 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE PERIOD Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 1-131 Cs-134 Cs-137 8a-140 La-140 80-50 01/14/21 - 01/14/21

< 6

< 12

< 8

< 13

< 6

< 10

< 9

< 7

< 25

< 8 04/09/21 - 04/09/21

< 5

< 4

< 9

< 7

< 12

< 5

< 10

< 7

< 5

< 22

< 7 07/08/21 - 07/08/21

< 7

< 8

< 13

< 7

< 17

< 7

< 12

< 11

< 8

< 7

< 32

< 10 10/14/21 10/14/21

< 3

< 4

< 9

< 4

< 9

<4

< 7

<8

<4

< 21

< 7 MEAN 80-51 01/14/21 - 01/14/21

< 6

< 12

< 7

< 15

< 7

< 9

< 11

< 7

< 8

< 29

< 12 04/09/21 - 04/09/21

< 5

< 11

< 6

< 11

<6

< 10

< 7

< 5

< 7

< 22

< 8 07/08/21 - 07/08/21

< 5

< 6

< 14

< 4

< 13

< 6

< 10

< 9

< 7

< 6

< 24

< 8 10/14/21 - 10/14/21

< 5

< 11

<4

< 10

< 5

< 8

< 7

<4

< 5

< 23

< 9 MEAN

(')

I....

0 80-54 01/14/21 - 01/14/21

< 5

< 13

< 6

< 12

< 6

< 9

< 11

< 7

< 31

< 8 04/09/21 - 04/09/21

< 6

< 5

< 12

< 5

< 10

< 5

< 10

< 8

< 5

< 23

< 8 07/08/21 - 07/08/21

< 7

< 6

< 15

< 6

< 12

< 6

< 11

< 10

< 7

< 6

< 31

< 13 10/14/21 - 10/14/21

< 5

< 11

< 6

< 10

< 6

< 9

< 6

< 28

< 9 MEAN

Table C-IV.1 CONCENTRATIONS OF IRON-55, NICKEL-63 AND GAMMA EMITTERS IN FISH SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2021 RESULTS IN UNITS OF PCI/KG WET+/- 2 SIGMA COLLECTION SITE PERIOD Fe-55 Ni-63 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 1-131 Cs-134 Cs-137 Ba-140 La-140 BD-25 Shorthead Redhorse 05/04/21

< 180

< 172

< 52

< 50

< 118

< 46

< 107

< 51

< 89

< 90

< 56

< 45

< 213

< 81 Golden Redhorse 05/04/21

< 241

< 234

< 36

< 44

< 70

< 36

< 96

< 44

< 63

< 69

< 40

< 213

< 71 Smallmouth Bass 10/12/21

< 178

< 158

< 59

< 66

< 124

< 71

< 179

< 76

< 100

< 160

< 84

< 69

< 371

< 97 Golden Redhorse 10/12121

< 65

< 149

< 82

< 81

< 155

< 68

< 184

< 87

< 145

< 171

< 80

< 89

< 420

< 117 MEAN BD-28 Golden Redhorse 05104/21

< 237

< 155

< 53

< 47

< 83

< 43

< 85

< 49

< 76

< 71

< 41

< 50

< 231

< 77 Common Carp 05/04/21

< 179

< 185

< 27

< 30

< 47

< 26

< 53

< 24

< 53

< 55

< 33

< 23

< 148

< 42 0

Golden Redhorse 10/12/21

< 243

< 169

< 63

< 58

< 150

< 65

< 139

< 64

< 119

< 136

< 80

< 65

< 392

< 107 I.....

Smallmouth Bass 10112121

< 66

< 125

< 56

< 51

< 111

< 51

< 104

< 53

< 88

< 112

< 65

< 53

< 329

< 40 MEAN BD-41 Common Carp 05/04/21

< 116

< 211

< 35

< 44

< 83

< 38

< 89

< 41

< 63

< 54

< 53

< 36

< 209

< 60 Largemouth Bass 05/04/21

< 197

< 183

< 28

< 35

< 67

< 33

< 73

< 35

< 57

< 62

< 37

< 29

< 184

< 59 Bluegill 10112/21

< 91

< 207

< 65

< 82

< 154

< 45

< 150

< 80

< 119

< 162

< 57

< 53

< 425

< 151 Largemouth Bass 10/12/21

< 68

< 97

< 58

< 59

< 93

< 70

< 126

< 50

< 100

< 125

< 55

< 328

< 121 MEAN

Table C-V.1 CONCENTRATIONS OF IRON-55, NICKEL-63 AND GAMMA EMITTERS IN SEDIMENT SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2021 RESULTS IN UNITS OF PCI/KG DRY +/- 2 SIGMA COLLECTION SITE PERIOD Fe-55 Ni-63 Mn-54 Co-58.

Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Cs-137 Ba-140 La-140 BD-10 05/12/21

< 1037

< 208

< 90

< 82

< 197

< 83

< 134

< 88

< 131

< 75

< 100

< 676

< 227 10/12/21

< 1793

< 218

< 84

< 76

< 142

< 86

< 164

< 87

< 155

< 96

< 106

< 408

< 151 MEAN BD-25 05/25/21

< 1897

< 222

< 79

< 66

< 179

< 70

< 178

< 76

< 129

< 91.

< 95

< 378

< 79 10/12/21

< 1956

< 244

< 61

< 59

< 124

< 46

< 128

< 57

< 84

< 59

< 67

< 253

< 103 MEAN BD-57 05/25/21

< 1742

< 210

< 112

< 90

< 226

< 105

< 237

< 127

< 165

< 106

< 127

< 471

< 149 10/12/21

< 1800

< 162

< 61

< 63

< 116

< 53

< 157

< 53

< 114

< 62

< 61

< 311

< 105

(')

MEAN I

~

N

Table C-Vl.1 CONCENTRATIONS OF GROSS BETA IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2021 RESULTS IN UNITS OF E-3 PCI/CU METER+/- 2 SIGMA COLLECTION GROUP I - NEAR FIELD GROUP II - FAR FIELD PERIOD BD-06 BD-19 BD-20 BD-21 BD-02 BD-04 BD-05 12/31/20 - 01/07/21 16 +/- 4 15 +/- 4 14 +/- 4 17 +/- 4 15 +/- 4 14 +/- 4 16 +/- 4 01/07/21 - 01/14/21 20 +/- 5 21 +/- 5 19 +/- 4 16 +/- 4 22 +/- 5 21 +/- 5 18 +/- 4 01/14/21 - 01/20/21 18 +/- 5 20 +/- 5 18 +/- 5 16 +/- 5 32 +/- 9 14 +/- 4 19 +/- 5 01/20/21 - 01/28/21 9 +/- 3 10 +/- 3 10 +/- 3 10 +/- 3 9 +/- 3 9 +/- 3 15 +/- 4 01/28/21 - 02/04/21 17 +/- 4 16 +/- 4 22 +/- 5 17 +/- 4 17 +/- 4 14 +/- 4 17 +/- 5 02/04/21 - 02/11/21 28 +/- 5 37 +/- 5 35 +/- 5 32 +/- 5 34 +/- 5 34 +/- 5 31 +/- 5 02/11/21 - 02/19/21 16 +/- 4 19 +/- 4 16 +/- 4 17 +/- 4 20 +/- 4 16 +/- 4 17 +/- 4 02/18/21 - 02/25/21 24 +/- 5 27 +/- 5 22 +/- 5 26 +/- 5 22 +/- 4 20 +/- 4 25 +/- 5 02/25/21 - 03/04/21 25 +/- 5 18 +/- 4 21 +/- 5 17 +/- 4 16 +/- 4 15 +/- 4 19 +/- 5 03/04/21 - 03/11/21 16 +/- 4 20 +/- 4 18 +/- 4 16 +/- 4 16 +/- 4 18 +/- 4 19 +/- 4 03/11/21 - 03/18/21 19 +/- 5 16 +/- 4 19 +/- 5 15 +/- 4 18 +/- 4 17 +/- 4 17 +/- 4 03/18/21 - 03/25/21 14 +/- 4 18 +/- 5 14 +/- 4 13 +/- 4 13 +/- 4 12 +/- 4 17 +/- 4 03/25/21 - 04/01/21 14 +/- 4 13 +/- 4 15 +/- 4 15 +/- 4 12 +/- 4 18 +/- 5 16 +/- 4 04/01/21 - 04/09/21 15 +/- 4 18 +/- 4 21 +/- 4 18 +/- 4 17 +/- 4 17 +/- 4 17 +/- 4 04/09/21 - 04/15/21 7 +/- 4 8 +/- 4 9 +/- 4 7 +/- 4 9 +/- 4 9 +/- 4 9 +/- 4 04/15/21 - 04/22/21 13 +/- 4 9 +/- 4 11 +/- 4 10 +/- 4 16 +/- 4 12 +/- 4 13 +/- 4 04/22/21 - 04/29/21 20 +/- 5 24 +/- 5 18 +/- 5 16 +/- 4 20 +/- 5 19 +/- 5 20 +/- 5 04/29/21 - 05/06/21 14 +/- 4 16 +/- 4 14 +/- 4 10 +/- 3 12 +/- 4 15 +/- 4 15 +/- 4 05/06/21 - 05/13/21 7 +/- 3 11 +/- 4 11 +/- 4 7 +/- 3 13 +/- 4 6 +/- 3 11 +/- 4 05/13/21 - 05/20/21 14 +/- 4 21 +/- 5 21 +/- 5 15 +/- 4 24 +/- 5 18 +/- 4 19 +/- 5 05/20/21 - 05/27/21 14 +/- 4 15 +/- 4 17 +/- 5 17 +/- 4 15 +/- 4 15 +/- 4 15 +/- 4 05/27/21 - 06/03/21 21 +/- 4 23 +/- 5 23 +/- 5 20 +/- 4 21 +/- 5 21 +/- 4 20 +/- 5 06/03/21 - 06/10/21 15 +/- 4 18 +/- 4 18 +/- 4 15 +/- 4 21 +/- 5 17 +/- 4 16 +/- 4 06/10/21 - 06/17/21 12 +/- 4 16 +/- 4 15 +/- 4 15 +/- 4 16 +/- 4 18 +/- 4 16 +/- 4 06/17/21 - 06/24/21 19 +/- 5 19 +/- 4 17 +/- 4 16 +/- 4 21 +/- 5 19 +/- 4 19 +/- 5 06/24/21 - 07/01/21 11 +/- 4 9 +/- 4 9 +/- 4 9 +/- 3 7 +/- 3 11 +/- 4 10 +/- 4 07/01/21 - 07/08/21 16 +/- 4 17 +/- 4 21 +/- 5 16 +/- 4 19 +/- 4 20 +/- 4 17 +/- 4 07/08/21 - 07/15/21 12 +/- 4 17 +/- 5 12 +/- 4 12 +/- 4 12 +/- 4 14 +/- 4 14 +/- 4 07/15/21 - 07/22/21

12 +/- 4 14 +/- 4 15 +/- 4 13 +/- 4 15 +/- 4 14 +/- *4 14 +/- 4 07/22/21 - 07/29/21 32 +/- 5 32 +/- 5 29 +/- 5 29 +/- 5 32 +/- 5 33 +/- 5 31 +/- 5 07/29/21 - 08/05/21 17 +/- 4 17 +/- 4 16 +/- 4 15 +/- 4 17 +/- 5 21 +/- 5 17 +/- 5 08/05/21 - 08/12/21 21 +/- 5 22 +/- 5 21 +/- 5 20 +/- 5 23 +/- 5 28 +/- 5 20 +/- 4 08/12/21 - 08/19/21 17 +/- 4 18 +/- 5 21 +/- 5 17 +/- 4 18 +/- 4 20 +/- 5 24 +/- 5 08/19/21 - 08/26/21 20 +/- 5 26 +/- 5 22 +/- 5 17 +/- 5 22 +/- 5 21 +/- 5 22 +/- 5 08/26/21 - 09/02/21 22 +/- 4 16 +/- 4 20 +/- 4 19 +/- 4 22 +/- 4 19 +/- 4 21 +/- 4 09/02/21 - 09/09/21 16 +/- 4 18 +/- 4 20 +/- 5 20 +/- 4 20 +/- 4 19 +/- 4 18 +/- 4 09/09/21 - 09/16/21 25 +/- 5 24 +/- 5 28 +/- 5 27 +/- 5 27 +/- 5 32 +/- 5 22 +/- 5 09/16/21 - 09/23/21 18 +/- 5 22 +/- 5 16 +/- 4 17 +/- 4 20 +/- 5 18 +/- 4 18 +/- 4 09/23/21 - 09/30/21 23 +/- 6 21 +/- 6 21 +/- 6 23 +/- 5 24 +/- 6 24 +/- 5 25 +/- 6 09/30/21 - 10/07/21 24 +/- 4 27 +/- 5 35 +/- 5 27 +/- 5 27 +/- 5 24 +/- 5 29 +/- 5 10/07/21 - 10/14/21 22 +/- 5 23 +/- 5 20 +/- 5 24 +/- 5 23 +/- 5 23 +/- 5 22 +/- 5 10/14/21 - 10/21/21 28 +/- 5 26 +/- 5 25 +/- 5 23 +/- 5 23 +/- 5 28 +/- 5 23 +/- 5 10/21/21 10/28/21 10 +/- 4 11 +/- 4 12 +/- 4 12 +/- 4 13 +/- 4 13 +/- 4 10 +/- 4 10/28/21 - 11/04/21 14 +/- 4 15 +/- 4 11 +/- 4 15 +/- 4 14 +/- 4 12 +/- 4 15 +/- 5 11/04/21 - 11/11/21 37 +/- 6 35 +/- 5 35 +/- 5 35 +/- 5 34 +/- 5 38 +/- 6 38 +/- 6 11/11/21 - 11/19/21 11 +/- 3 14 +/- 4 16 +/- 4 12 +/- 3 12 +/- 3 13 +/- 3 14 +/- 4 11/19/21 - 11/26/21 20 +/- 5 20 +/- 5 17 +/- 5 21 +/- 5 19 +/- 5 19 +/- 5 19 +/- 5 11/26/21 - 12/02/21 25 +/- 5 30 +/- 6 27 +/- 6 27 +/- 5 29 +/- 6 22 +/- 5 27 +/- 6 12/02/21 - 12/09/21 16 +/- 4 18 +/- 5 19 +/- 5 16 +/- 4 18 +/- 4 17 +/- 5 16 +/- 4 12/09/21 - 12/16/21 21 +/- 5 21 +/- 5 19 +/- 5 23 +/- 5 22 +/- 5 22 +/- 5 21 +/- 5 12/16/21 - 12/23/21 28 +/- 5 21 +/- 5 26 +/- 5 36 +/- 6 29 +/- 5 27 +/- 5 26 +/- 5 12/23/21 - 12/30/21 33 +/- 5 42 +/- 6 42 +/- 6

. 40 +/- 6 36 +/- 6 38 +/- 5 32 +/- 5 MEAN+/- 2 STD DEV 18 +/- 13 20 +/- 14 19 +/- 14 18 +/- 14 20 +/- 14 19 +/- 14 19 +/- 12 THE MEAN AND TWO STANDARD DEV/A TION ARE CALCULATED USING THE POSITIVE VALUES C-13 GROUP Ill -

CONTROL BD-03 12 +/- 4 20 +/- 5 13 +/- 4 10 +/- 3 18 +/- 5 33 +/- 5 22 +/- 4 25 +/- 5 16 +/- 4 16 +/- 4 12 +/- 4 17 +/- 4 13 +/- 4 17 +/- 4 7 +/- 4 14 +/- 4 18 +/- 5 14 +/- 4 9 +/- 4 20 +/- 5 16 +/- 4 20 +/- 5 18 +/- 4 17 +/- 4 16 +/- 4 12 +/- 4 18.+/- 4 8 +/- 4 16 +/- 4 31 +/- 5 21 +/- 5 23 +/- 5 15 +/- 4 21 +/- 5 15 +/- 4 19 +/- 4 21 +/- 5 19 +/- 5 21 +/- 6 24 +/-. 5 21 +/- 5 17 +/- 5 9 +/- 4 11 +/- 4 36 +/- 6 10 +/- 3 16 +/- 5 25 +/- 6 11 +/- 4 19 +/- 5 28 +/- 6 39 +/- 6 18 +/- 14

Table C-Vl.2 MONTHLY AND YEARLY VALUES OF GROSS BETA CONCENTRATIONS IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2021 RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMA GROUP I - NEAR FIELD LOCATIONS GROUP II - FAR FIELD LOCATIONS GROUP Ill - CONTROL LOCATIONS COLLECTION MIN MAX MEAN COLLECTION MIN MAX MEAN COLLECTION MIN MAX MEAN PERIOD

+/-2SD PERIOD

+/-2SD 12/31/20 - 01/28/21 9

21 16 +/- 8 12/31/20 - 01/28/21 9

32 17 +/- 12 12/31/20 - 01/28/21 10 20 14 +/- 9 01/28/21 - 02/25/21 16 37 23 +/- 14 01/28/21 - 02/25/21 14 34 22 +/- 14 01/28/21 - 02/25/21 18 33 24 +/- 13 02/25/21 - 03/25/21 13 25 17 +/- 6 02/25/21 - 03/25/21 12 19 16 +/- 4 02/25/21 - 03/25/21 12 17 15 +/- 4 03/25/21 - 04/29/21 7

24 14 +/- 10 03/25/21 - 04/29/21 9

20 15 +/- 8 03/25/21 - 04/29/21 7

18 14 +/- 9 04/29/21 - 05/27 /21 7

21 14 +/- 8 04/29/21 - 05/27/21 6

24 15 +/- 9 04/29/21 - 05/27/21 9

20 15 +/- 9 05/27/21 - 06/24/21 12 23 18 +/- 6 05/27/21 - 06/24/21 16 21 19 +/- 4 05/27/21 - 06/24/21 16 20 18 +/- 3 06/24/21 - 07/29/21 9

32 17 +/- 15 06/24/21 - 07/29/21 7

33 17 +/- 16 06/24/21 - 07/29/21 8

31 17 +/- 18 07/29/21 - 09/02/21 5

26 19 +/- 6 07 /29/21 - 09/02/21 17 28 21 +/- 6 07 /29/21 - 09/02/21 15 23 19 +/- 7 09/02/21 - 09/30/21 16 28 21 +/- 7 09/02/21 - 09/30/21 18 32 22 +/- 9 09/02/21 - 09/30/21 19 21 20 +/- 3 09/30/21 - 10/28/21 10 35 22 +/- 14 09/30/21 - 10/28/21 10 29 21 +/- 12 09/30/21 - 10/28/21 9

24 18 +/- 14 10/28/21 - 12/02/21 11 37 24 +/- 17 10/28/21 - 12/02/21 12 38 24 +/- 18 10/28/21 - 12/02/21 10 36 20 +/- 22 0

12/02/21 - 12/30/21 16 42 26 +/- 19 12/02/21 - 12/30/21 16 38 25 +/- 15 12/02/21 - 12/30/21 11 39 24 +/- 24 I

~

.i=.

12/31/20 - 12/30/21 6

32 16 +/- 11 12/31/20 - 12/30/21 6

34 16 +/- 11 12/31/20 - 12/30/21 8

31 17 +/- 11 THE MEAN AND TWO STANDARD DEVIATION ARE CALCULATED USING THE POSITIVE VALUES

Table C-Vl.3 CONCENTRATIONS OF GAMMA EMITTERS IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2021 RESULTS IN UNITS OF E-3 PCI/CU METER+/- 2 SIGMA 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 BD-02 12/31/20 - 03/25/21

< 2

< 6

< 3

< 5

< 2

< 5

<2

< 2

< 13

< 5 03/25/21 - 06/24/21

< 2

< 3

< 6

< 3

< 6

< 3

< 5

< 2

< 21

< 7 06/24/21 - 09/30/21

< 2

< 7

< 3

< 5

< 3

< 5

< 3

< 16

< 8 09/30/21 - 12/30/21

< 3

< 8

< 3

< 7

< 3

< 5

<4

< 4

< 15

< 8 MEAN BD-03 12/31/20 - 03/25/21

< 3

< 7

<4

< 8

< 2

< 5

< 2

< 22

< 12 03/25/21 - 06/24/21

< 2

< 5

< 2

< 7

< 2

< 5

< 2

< 18

< 5 06/24/21 - 09/30/21

< 2

< 3

< 2

<4

< 1

< 4

< 2

< 9

< 3 09/30/21 - 12/30/21

< 2

< 3

<4

<.2

< 3

< 2

< 15

< 6 MEAN

(")

I....

(11 BD-04 12/31/20 - 03/25/21

< 2

< 6

< 3

< 7

< 2

<4

< 3

< 2

< 16

< 10 03/25/21 - 06/24/21

< 2

< 6

< 2

< 5

< 2

< 3

< 2

< 13

< 6 06/24/21 - 09/30/21

< 2

< 1

< 5

< 1

<4

< 2

< 4

< 2

< 8

< 4 09/30/21 - 12/30/21

< 3

< 6

< 3

< 8

< 3

<4

< 3

< 23

< 7 MEAN BD-05 12/31/20 - 03/25/21

< 4

< 3

< 12

<4

< 9

< 3

< 7

<4

< 3

< 26

< 10 03/25/21 - 06/24/21

< 2

< 6

< 3

< 6

< 3

< 4

< 3

< 2

< 22

< 8 06/24/21 - 09/30/21

< 2

< 3

< 5

< 2

< 6

< 2

< 5

< 2

< 14

< 6 09/30/21 - 12/30/21

< 2

< 5

< 1

< 5

< 2

<4

< 2

< 13

< 4 MEAN BD-06 12/31/20 - 03/25/21

< 1

< 2

< 7

< 2

< 4

< 2

<4

< 3

< 2

< 17

< 4 03/25/21 - 06/24/21

< 3

< 4

< 6

< 5

< 7

< 3

< 6

<4

< 3

< 30

< 11 06/24/21 - 09/30/21

< 3

< 8

< 3

< 7

< 3

< 5

< 3

< 17

< 7 09/30/21 - 12/30/21

< 2

< 5

<2

< 5

< 2

< 11

< 5 MEAN

Table C-Vl.3 CONCENTRATIONS OF GAMMA EMITTERS IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2021 RESULTS IN UNITS OF E-3 PCI/CU METER+/- 2 SIGMA 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 BD-19 12/31/20 - 03/25/21

<4

< 3

< 10

<4

< *10

< 5

< 8

< 5

< 4

< 26

< 9 03/25/21 - 06/24/21

< 2

< 3

< 5

< 3

<6

< 2

< 5

< 2

< 17

< 9 06/24/21 - 09/30/21

< 2

< 1

< 3

< 2

< 5

< 1

< 3

< 1

< 2

< 12

< 5 09/30/21 - 12/30/21

< 2

< 6

<4

< 7

< 3

<4

< 2

< 11

< 5 MEAN BD-20 12/31/20 - 03/25/21

< 2

< 7

< 3

< 6

< 2

< 4

< 3

< 1

< 20

< 8 03/25/21 - 06/24/21

<2

< 1

< 3

< 2

< 3

< 2

< 3

< 2

< 15

< 9 06/24/21 - 09/30/21

< 2

<4

< 2

< 3

< 2

< 11

< 5 09/30/21 - 12/30/21

< 3

< 2

< 3

< 2

< 6

< 2

< 3

< 2

< 14

< 5 MEAN

(')

I....

O>

BD-21 12/31/20 - 03/25/21

< 2

< 5

< 2

< 6

< 2

<4

< 2

< 12

< 5 03/25/21 - 06/24/21

< 2

< 6

< 2

< 5

< 2

< 4

< 2

< 18

< 3 06/24/21 - 09/30/21

< 2

< 1

< 3

< 2

<4

< 2

< 3

< 2

< 10

< 2 09/30/21 - 12/30/21

< 2

< 1

< 5

< 2

< 4

< 2

< 3

< 2

< 1

< 9

< 3 MEAN

Table C-Vll.1 CONCENTRATIONS OF 1-131 IN AIR IODINE SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2021 RESULTS IN UNITS OF E-3 PCI/CU METER+/- 2 SIGMA GROUP I - NEAR FIELD GROUP II - FAR FIELD GROUP Ill -

COLLECTION CONTROL PERIOD BD-06 BD-19 BD-20 BD-21 BD-02 BD-04 BD-05 BD-03 12/31/20 - 01/07/21

< 34

< 33

< 34

< 51

< 52

< 50 01/07/21 - 01/14/21

< 34

< 33

< 34

< 35

< 36

< 37

< 36 01/14/21 - 01/20/21

< 46

< 44

< 43

< 45

< 38

< 32

< 34

< 33 01/20/21 - 01/28/21

< 28

< 27

< 28

< 26

< 19

< 48

< 50

< 49 01/28/21 - 02/04/21

< 38

< 37

< 36

< 32

< 31

< 35

< 34 02/04/21 - 02/11/21

< 43

< 59

< 61

< 57

< 44

< 48

< 25

< 47 02/11/21 - 02/19/21

< 31

< 64

< 50

< 60

< 63

< 65

< 44 02/18/21 - 02/25/21

< 34

< 35

< 34

< 42

< 44

< 44 02/25/21 - 03/04/21

< 18

< 41

< 42

< 40

< 32

< 29

< 33 03/04/21 - 03/11/21

< 17

< 31

< 32

< 31

< 29

< 31

< 30 03/11/21 - 03/18/21

< 48

< 47

< 20

< 47

< 64

< 69

< 69 03/18/21 - 03/25/21

< 30

< 30'

< 28

< 34

< 37

< 36

< 37 03/25/21 - 04/01/21

< 63

< 64

< 62

< 41

< 39

< 40

< 41 04/01/21 - 04/09/21

< 28

< 27

< 30

< 32

< 31

< 31 04/09/21 - 04/15/21

< 34

< 33

< 15

< 48

< 50

< 50 04/15/21 - 04/22/21

< 35

< 34

< 35

< 33

< 39

< 38 04/22/21 - 04/29/21

< 35

< 34

< 52 *

< 22

< 53

< 52 04/29/21 - 05/06/21

< 46

< 47

< 43

< 52

< 50

< 53

< 23 05/06/21 - 05/13/21

< 43

< 40

< 15

< 14

< 15 05/13/21 - 05/20/21

< 35

< 34

< 35

< 34

< 35

< 35 05/20/21 - 05/27/21

< 35

< 34

< 33

< 43

< 41

< 44

< 44 05/27/21 - 06/03/21

< 51

< 31

< 29

< 53

< 48

< 23

< 54 06/03/21 - 06/10/21

< 53

< 50

< 21

< 39

< 37

< 39 06/10/21 - 06/17/21

< 44

< 41

< 42

< 40

< 32

< 16

< 32

< 34 06/17/21 - 06/24/21

< 36

< 35

< 34

< 44

< 41

< 44

< 44 06/24/21 - 07/01/21

< 55

< 56

< 55

< 52

< 56

< 55

< 58

< 60 07/01/21 - 07/08/21

< 38

< 37

< 38

< 15

< 42

< 42 "42

< 44 07/08/21 - 07/15/21

< 37

< 35

< 32

< 31

< 32

< 33 07/15/21 - 07/22/21

< 49

< 50

< 49

< 20

< 48

< 49 07/22/21 - 07/29/21

< 40

< 39

< 40

< 38

< 42

< 40

< 42

< 42 07/29/21 - 08/05/21

< 44

< 46

< 43

< 42

< 38

< 42

< 43 08/05/2.1 - 08/12/21

< 27

< 28

< 27

< 31

< 32

< 15

< 31 08/12/21 - 08/19/21

< 29

< 31

< 30

< 13

< 34

< 33

< 34 08/19/21 - 08/26/21

< 34

< 33

< 35

< 33

< 37

< 36

< 37

< 38 08/26/21 - 09/02/21

< 40

< 41

< 42

< 41

< 45

< 42

< 46

< 45 09/02/21 - 09/09/21

< 46

< 47

< 44

< 52

< 51

< 21

< 53 09/09/21 - 09/16/21

< 46

< 47

< 46

< 41

< 42

< 41 09/16/21 - 09/23/21

< 49

< 48

< 50

< 47

< 39

< 37

< 38

< 16 09/23/21 - 09/30/21

< 44

< 45

< 46

< 18

< 64

< 58

< 64

< 65 09/30/21 - 10/07/21

< 33

< 35

< 29

< 30

< 24

< 29 10/07/21 - 10/14/21

< 38

< 37

< 32

< 15

< 32

< 32 10/14/21 - 10/21/21

< 44

< 45

< 18

< 51

< 49

< 50

< 53 10/21/21 10/28/21

< 34

< 33

< 35

< 33

< 32

< 30

< 32

< 33 10/28/21 - 11/04/21

< 38

< 39

< 37

< 50

< 47

< 50

< 53 11/04/21 11/11/21

< 51

< 50

< 21

< 46

< 47

< 46 11/11/21 11/19/21

< 18

< 28

< 27

< 18

< 17

< 18

< 18 11/19/21 11/26/21

< 32

< 34

< 32

< 34

< 32

< 34 11/26/21 - 12/02/21

< 20

< 29

< 27

< 30

< 30 12/02/21 - 12/09/21

< 32

< 31

< 36

< 37

< 36

< 37 12/09/21 12/16/21

< 32

< 31

< 30

< 31

< 16 12/16/21 - 12/23/21

< 36

< 35

< 36

< 34

< 33

< 36

< 36 12/23/21 - 12/30/21

< 37

< 30

< 63

< 59

< 64

< 67 MEAN C-17

Table C-Vlll.1 CONCENTRATIONS OF 1-131 IN MILK SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2021 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION CONTROL FARM PERIOD BD-18 03/31/21

< 0.9 05/05/21

< 0.9 05/20/21

< 0.8 10/21/21

< 0.9 11/03/21

< 0.6 MEAN C-18

C')

I

~

c.o Table C-Vlll.2 COLLECTION SITE PERIOD BD-18 03/31/21 05/05/21 05/20/21 10/21/21 11/03/21 MEAN Table C-Vlll.3 SITE COLLECTION PERIOD Mn-54

< 8

< 6

< 5

< 7

< 7 CONCENTRATIONS OF GAMMA EMITTERS IN MILK SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2021 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Cs-137 Ba-140

< 7

< 15

< 8

< 16

< 8

< 14

< 6

< 7

< 37

< 8

< 18

< 9

< 20

< 5

< 12

< 7

< 9

< 26

< 5

< 11

< 6

< 11

< 6

< 9

< 6

< 22

< 6

< 14

< 6

< 16

<6

< 10

<6

< 7

< 24

< 8

< 16

< 7

< 16

< 7

< 11

< 8

< 7

< 31 CONCENTRATIONS OF GAMMA EMITTERS IN GRASS SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2021 RESULTS IN UNITS OF PCI/KG WET+/- 2 SIGMA La-140

< 9

< 11

< 7

< 9

< 9 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 1-131 Cs-134 Cs-137 Ba-140 La-140 No Substitute Grass Samples Taken in 2021

Table C-IX.1 CONCENTRATIONS OF GAMMA EMITTERS IN VEGETATION SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2021 RESULTS IN UNITS OF PCI/KG WET+/- 2 SIGMA COLLECTION SITE PERIOD Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 1-131 Cs-134 Cs-137 Ba-140 La-140 BO-CONTROL Lettuce 06/17/21

< 33

< 38

< 68

< 36

< 81

< 35

< 64

< 43

< 38

< 140

< 48 Collard Greens 06/30/21

< 35

< 34

< 71

< 42

< 74

< 36

< 62

< 52

< 37

< 35

< 164

< 64 Swiss Chard 06/30/21

< 31

< 39

< 75

< 39

< 76

< 42

< 63

< 50

< 31

< 28

< 159

< 58 Collard Greens 07/22/21

< 36

< 33

< 79

< 36

< 94

< 38

< 57

< 53

< 35

< 38

< 188

< 43 Radish 07/29/21

< 42

< 39

< 86

< 39

< 81

< 35

< 57

< 47

< 31

< 40

< 177

< 57 Swiss Chard 07/30/21

< 42

< 34

< 82

< 47

< 88

< 39

< 72

< 54

< 44

< 40

< 168

< 45 Radish Leaves 08/13/21

< 17

< 30

< 49

< 29

< 60

< 26

< 38

< 32

< 27

< 25

< 101

< 24 Swiss Chard 08/13/21

< 16

< 17

< 35

< 19

< 36

< 18

< 30

< 22

< 18

< 17

< 71

< 23 Radish Leaves 08/26/21

< 21

< 15

< 52

< 31

< 47

< 25

< 35

< 31

< 27

< 24

< 94

< 27 Radish 08/26/21

< 40

< 35

< 78

< 27

< 78

< 32

< 63

< 55

< 33

< 38

< 188

< 57 Radish Leaves 08/26/21

< 21

< 15

< 52

< 31

< 47

< 25

< 35

< 31

< 27

< 24

< 94

< 27 Radish 09/09/21

< 35

< 30

< 74

< 38

< 68

< 32

< 54

< 49

< 37

< 34

< 162

< 43 Radish Leaves 09/09/21

< 21

< 22

< 44

< 25

< 50

< 24

< 33

< 31

< 22

< 113

< 31 Radish Leaves 09/09/21

< 21

< 22

< 44

< 25

< 50

< 24

< 33

< 31

< 22

< 113

< 31 C')

Swiss Chard 09/09/21

. < 28

< 28

< 56

< 32

< 56

< 27

< 49

< 34

< 31

< 29

< 113

< 35 I

I\\:)

Collard Greens 09/09/21

< 38

< 36

< 75

< 40

< 80

< 40

< 69

< 59

< 44

< 42

< 175

< 55 0

Radish Leaves 09/23/21

< 24

< 29

< 55

< 25

< 58

< 28

< 46

< 40

< 25

< 29

< 106

< 29 Collard Greens 09/23/21

< 35

< 34

< 68

< 38

< 76

< 43

< 67

< 51

< 46

< 32

< 136

< 54 Radish 09/23/21

< 34

< 33

< 79

< 35

< 77

< 36

< 46

< 34

< 33

< 151

< 62 Radish Leaves 09/23/21

< 24

< 29

< 55

< 25

< 58

< 28

< 46

< 40

< 25

< 29

< 106

< 29 Collard Greens 09/23/21

< 35

< 34

< 68

< 38

< 76

< 43

< 67

< 51

< 46

< 32

< 136

< 54 Turnip Leaves 10/08/21

< 28

< 31

< 65

< 36

< 62

< 36

< 54

< 42

< 36

< 31

< 86

< 26 Swiss Chard 10/07/21

< 34

< 33

< 72

< 39

< 70

< 26

< 57

< 47

< 33

< 32

< 116

< 43 Collard 10/07/21

< 24

< 26

< 48

< 28

< 55

< 25

< 44

< 35

< 27

< 28

< 117

< 39 Turnip 10/07/21

< 32

< 29

< 72.

< 37

< 81

< 31

< 60

< 43

< 44

< 32

< 128

< 33 Swiss Chard 10/21/21

< 35

< 33

< 82

< 41

< 73

< 34

< 51

< 53

< 38

< 34

< 151

< 45 Collard 10/21/21

< 26

< 53

< 27

< 56

< 27

< 41

< 37

< 28

< 119

< 39 Radish 10/21/21

< 19

< 17

< 35

< 17

< 36

< 15

< 32

< 23

< 21

< 89

< 26 MEAN BO-QUAD 1 Collard Greens 07/22/21

< 28

< 58

< 33

< 61

< 29

< 50

< 40

< 31

< 30

< 124

< 36 Zucchini Leaves 07/22/21

< 28

< 26

< 50

< 28

< 58

< 25

< 42

< 36

< 30

< 28

< 109

< 35 Collard Greens 08/19/21

< 30

< 24

< 55

< 32

< 37

< 25

< 40

< 47

< 32

< 33

< 115

< 43 Kohlrabi 08/19/21

< 22

< 17

< 31

< 19

< 40

< 17

< 32

< 28

< 18

< 19

< 77

< 22 Collard Greens 09/23/21

< 34

< 32

< 85

< 33

< 76

< 30

< 55

< 46

< 32

< 34

< 131

< 23 MEAN

Table C-IX.1 CONCENTRATIONS OF GAMMA EMITTERS IN VEGETATION SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2021 RESULTS IN UNITS OF PCI/KG WET+/- 2 SIGMA COLLECTION SITE PERIOD Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 1-131 Cs-134 Cs-137 Ba-140 La-140 BD-QUAD 2 White Radish 07/08/21

< 18

< 25

< 44

< 26

< 57

< 23

< 41

< 31

< 26

< 28

< 115

< 34 Onion 07/08/21

< 19

< 16

< 37

< 18

< 43

< 21

< 27

< 30

< 21

< 18

< 83

< 25 Collard Greens 07/08/21

< 28

< 31

< 63

< 31

< 65

< 30

< 63

< 43

< 24

< 39

< 104

< 41 Onion 08/19/21

< 22

< 17

< 48

< 23

< 39

< 23

< 38

< 27

< 26

< 20

< 87

< 27 Collard Greens 08/19/21

< 23

< 21

< 50

< 23

< 50

< 22

< 41

< 33

< 23

< 94

< 36 Swiss Chard 08/19/21

< 16

< 15

< 35

< 17

< 42

< 15

< 28

< 19

< 18

< 15

< 68

< 20 Onion 09/23/21

< 13

< 14

< 33

< 15

< 36

< 20

< 34

< 27

< 18

< 19

< 81

< 20 Collard Greens 09/23/21

< 30

< 24

< 47

< 23

< 53

< 27

< 45

< 35

< 27

< 23

< 103

< 26 Swiss Chard 09/23/21

< 31

< 28

< 57

< 33

< 49

< 28

< 42

< 31

< 34

< 30

< 104

< 33 Red Beets 09/23/21

< 19

< 24

< 44

< 21

< 55

< 23

< 35

< 29

< 28

< 24

< 88

< 27 Kale 10/14/21

< 37

< 41

< 70

< 39

< 85

< 36

< 75

< 46

< 28

< 35

< 147

< 65 Cabbage 10/14/21

< 14

< 13

< 31

< 13

< 35

< 14

< 24

< 18

< 16

< 15

< 60

< 20 Collard Greens 10/14/21

< 29

< 32

< 82

< 28

< 70

< 36

< 63

< 43

< 39

< 29

< 125

< 44 Swiss Chard 10/14/21

< 25

< 26

< 48

< 17

< 48

< 30

< 42

< 34

< 26

< 29

< 123

< 25 0

MEAN I

BD-QUAD 3 N

~

Carrots 07/22/21

< 28

< 34

< 74

< 45

< 83

< 34

< 64

< 48

< 43

< 42

< 136

< 48 Collard Greens 07/22/21

< 32

< 36

< 75

< 28

< 81

< 39

< 59

< 41

< 39

< 44

< 141

< 46 Red Beets 07/22/21

< 30

< 28

< 44

< 32

< 74

< 34

< 44

< 49

< 25

< 29

< 116

< 19 Cabbage 08/19/21

< 19

< 20

< 36

< 18

< 38

< 19

< 32

< 30

< 22

< 17

< 88

< 19 Collard Greens 08/19/21

< 22

< 23

< 43

< 19

< 53

< 22

< 40

< 31

< 20

< 19

< 108

< 20 Red Beets 08/19/21

< 18

< 38

< 19

< 31

< 17

< 33

< 31

< 19

< 20

< 81

< 24 Cabbage 09/23/21

< 33

< 43

< 70

< 31

< 70

< 35

< 70

< 48

< 36

< 127

< 43 Collard Greens 09/23/21

< 35

< 36

< 65

< 29

< 78

< 35

< 55

< 41

< 37

< 111

< 53 Red Beets 09/23/21

< 21

< 22

< 45

< 25

< 60

< 25

< 36

< 33

< 24

< 26

< 111

< 30 Carrots 09/23/21

< 20

< 21

< 48

< 22

< 47

< 25

< 31

< 27

< 23

< 21

< 88

< 22 Collard Greens 10/14/21

< 31

< 59

< 29

< 70

< 30

< 57

< 34

< 27

< 129

< 39 Red Beets 10/14/21

< 13

< 19

< 38

< 23

< 42

< 17

< 32

< 28

< 24

< 22

< 82

< 22 MEAN BD-QUAD 4 Radishes 07/22/21

< 38

< 34

< 68

< 39

< 78

< 44

< 52

< 51

< 36

< 34

< 164

< 52 Red Beets 07/22/21

< 34

< 28

< 71

< 40

< 78

< 31

< 51

< 44

< 43

< 37

< 151

< 40 Mustard Greens 07/22/21

< 29

< 32*

< 69

< 33

< 73

< 30

< 68

< 46

< 28

< 26

< 156

< 53 Mustard Greens 08/19/21

< 27

< 25

< 55

< 31

< 53

< 28

< 47

< 43

< 29

< 31

< 123

< 34 Red Beets 08/19/21

< 16

< 17

< 30

< 20

< 36

< 17

< 23

< 22

< 16

< 15

< 67

< 19 Swiss Chard 08/19/21

< 26

< 24

< 60

< 30

< 72

< 32

< 46

< 41

< 35

< 28

< 122

< 40 Radish 09/23/21

< 29

< 27

< 73

< 29

< 70

< 32

< 38

< 40

< 34

< 27

< 121

< 16 Red Beets 09/23/21

< 34

< 26

< 81

< 25

< 82

< 36

< 63

< 41

< 35

< 37

< 130

< 35 Collard Greens 09/23/21

< 28

< 22

< 70

< 34

< 55

< 31

< 50

< 30

< 21

< 27

< 90

< 42 Swiss Chard 10/14/21

< 33

< 65

< 32

< 73

< 32

< 53

< 40

< 33

< 23

< 138

< 32 Red Beets 10/14/21

< 29

< 26

< 60

< 35

< 82

< 30

< 50

< 35

< 36

< 133

< 37 Collard Greens 10/14/21

< 37

< 29

< 73

< 42

< 73

< 30

< 58

< 42

< 36

< 31

< 130

< 55 MEAN

Table C-IX.1 CONCENTRATIONS OF GAMMA EMITTERS IN VEGETATION SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2021 RESULTS IN UNITS OF PCI/KG WET+/- 2 SIGMA COLLECTION SITE PERIOD Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 1-131 Cs-134 Cs-137 Ba-140 La-140 BWD-G1 Kale 06/17121

< 38

< 41

< 86

< 37

< 81

< 39

< 69

< 55

< 42

< 41

< 160

< 49 Kohlrabi 06/17121

< 36

< 35

< 59

< 31

< 89

< 41

< 57

< 51

< 39

< 30

< 143

< 47 Kale 07/01/21

< 34

< 30

< 79

< 39

< 74

< 29

< 51

< 45

< 34

< 35

< 136

< 53 Cabbage 07101/21

< 28

< 32

< 62

< 32

< 72

< 33

< 48

< 42

< 35

< 30

< 142

< 46 Kohlrabi 07/01/21

< 18

< 20

< 44

< 21

< 44

< 19

< 41

< 29

< 16

< 26

< 111

< 35 Kale 07/15/21

< 30

< 86

< 29

< 58

< 30

< 51

< 32

< 38

< 150

< 46 CABBAGE 07/15/21

< 31

< 29

< 68

< 32

< 69

< 31

< 50

< 49

< 33

< 35

< 130

< 42 Swiss Chard 07/15/21

< 35

< 41

< 68

< 36

< 74

< 34

< 67

< 42

< 38

< 44

< 159

< 47 Turnip 07/29/21

< 18

< 21

< 42

< 26

< 40

< 20

< 36

< 30

< 21

< 23

< 91

< 25 Cabbage 07/29/21

< 31

< 27

< 58

< 27

< 78

< 26

< 63

< 42

< 40

< 27

< 128

< 54 Swiss Chard 07/29/21

< 28

< 24

< 57

< 22

< 66

< 27

< 54

< 43

< 34

< 109

< 46 Kale 08/12/21

< 28

< 27

< 61

< 24

< 55

< 27

< 47

< 39

< 37

< 35

< 130

< 48 Cabbage 08/12/21

< 16

< 21

< 45

< 20

< 32

< 20

< 28

< 29

< 20

< 65

< 22 0

Turnip 08/12/21

< 21

< 17

< 38

< 24

< 51

< 18

< 37

< 28

< 24

< 21

< 102

< 27 I

Kale 08/26/21

< 38

< 33

< 80

< 37

< 66

< 33

< 53

< 54

< 35

< 148

< 22 I\\)

I\\)

Cabbage 08/26/21

< 19

< 16

< 37

< 21

< 34

< 20

< 33

< 27

< 22

< 90

< 32 Kohlrabi 08/26/21

< 25

< 19

< 47

< 27

< 46

< 28

< 49

< 48

< 28

< 94

< 21 Turnip 09/09/21

< 27

< 24

< 50

< 22

< 56

< 28

< 43

< 40

< 24

< 29

< 128

< 24 Kale 09/09/21

< 26

< 31

< 54

< 28

< 52

< 27

< 40

< 37

< 33

< 108

< 30 Kohlrabi 09/09/21

< 25

< 16

< 54

< 25

< 55

< 23

< 44

< 37

< 29

< 28

< 125

< 21 Cabbage 09/23/21

< 27

< 23

< 55

< 24

< 50

< 23

< 39

< 35

< 28

< 21

< 101

< 30 Kale 09/23/21

< 29

< 26

< 52

< 33

< 65

< 27

< 59

< 50

< 29

< 30

< 95

< 37 Turnip 09/23/21

< 24

< 20

< 47

< 24

< 54

< 29

< 39

< 36

< 30

< 28

< 118

< 21 Cabbage 10/07/21

< 21

< 18

< 45

< 24

< 44

< 22

< 27

< 29

< 17

< 26

< 94

< 30 Kale 10/07/21

< 34

< 33

< 65

< 37

< 97

< 38

< 48

< 43

< 42

< 40

< 121

< 40 Turnip 10/07/21

< 21

< 20

< 45

< 22

< 46

< 23

< 34

< 28

< 22

< 23

< 110

< 18 Kohlrabi 10/21/21

< 17

< 23

< 30

< 19

< 42

< 19

< 31

< 29

< 23

< 21

< 80

< 27 Kale 10/21/21

< 22

< 27

< 46

< 26

< 62

< 28

< 44

< 41

< 34

< 32

< 96

< 39 Swiss Chard 10/21/21

< 36

< 26

< 67

< 33

< 79

< 32

< 61

< 44

< 36

< 30

< 131

< 36 MEAN

Table C-IX.1 CONCENTRATIONS OF GAMMA EMITTERS IN VEGETATION SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2021 RESULTS IN UNITS OF PCI/KG WET+/- 2 SIGMA COLLECTION SITE PERIOD Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 1-131 Cs-134 Cs-137 Ba-140 La-140 BWD-G2 Kohlrabi 06/17/21

< 35

< 29

< 65

< 30

< 73

< 29

< 45

< 36

< 29

< 31

< 111

< 35 Cabbage 07/01/21

< 27

< 30

< 65

< 27

< 77

< 33

< 62

< 54

< 32

< 33

< 140

< 41 Kohlrabi 07/01/21

< 27

< 22

< 52

< 30

< 48

< 26

< 34

< 40

< 24

< 32

< 106

< 42 Swiss Chard 07/01/21

< 35

< 31

< 57

< 34

< 67

< 38

< 50

< 52

< 34

< 39

< 132

< 58 Cabbage 07115/21

< 25

< 28

< 71

< 33

< 86

< 32

< 52

< 51

< 34

< 32

< 151

< 19 Kale 07115/21

< 50

< 42

< 92

< 40

< 104

< 46

. < 83

< 47

< 49

< 48

< 187

< 57 Swiss Chard 07115/21

< 30

< 31

< 77

< 31

< 89

< 34

< 5.8

< 48

< 47

< 33

< 134

< 38 Turnip 07/29/21

< 29

< 32

< 61

< 36

< 60

< 32

< 52

< 47

< 30

< 34

< 134

< 45 Kohlrabi 07/29/21

< 24

< 34

< 63

< 28

< 52

< 30

< 51

< 40

< 39

< 27

< 123

< 38 Swiss Chard 07/29/21

< 35

< 37

< 83

< 35

< 102

< 37

< 61

< 52

< 47

< 41

< 165

< 49 Kale 08/12/21

< 42

< 34

< 81

< 41

< 93

< 43

< 59

< 51

< 44

< 41

< 154

< 40 Turnip 08/12/21

< 31

< 30

< 60

< 34

< 56

< 30

< 47

< 29

< 33

< 31

< 108

< 35 Swiss Chard 08/12/21

< 42

< 84

< 31

< 97

< 26

< 58

< 46

< 43

< 45

< 149

< 50 C)

Kohlrabi 08/26/21

< 26

< 21

< 48

< 23

< 72

< 21

< 51

< 55

< 30

< 32

< 146

< 41 I

Cabbage 08/26/21

< 35

< 28

< 62

< 35

< 74

< 33

< 55

< 48

< 31

< 33

< 128

< 28 I\\)

~

Swiss Chard 08/26/21

< 30

< 37

< 57

< 36

< 82

< 36

< 54

< 49

< 38

< 40

< 151

< 33 Turnip 09/09/21

< 25

< 22

< 49

< 20

< 55

< 24

< 49

< 38

< 29

< 31

< 125

< 35 Cabbage 09/09/21

< 23

< 28

< 45

< 20

< 44.

< 27

< 46

< 40

< 30

< 28

< 116

< 31 Swiss Chard 09/09/21

< 28

< 22

< 62

< 29

< 70

< 30

< 44

< 38

< 30

< 31

< 96

< 18 Swiss Chard 09/23/21

< 23

< 31

< 46

< 35

< 48

< 31

< 48

< 40

< 32

< 34

< 130

< 25 Cabbage 09/23/21

< 26

< 23

< 61

< 22

< 58

< 26

< 37

< 39

< 31

< 34

< 113

< 25 Kohlrabi 09/23/21

< 25

< 23

< 50

< 25

< 54

< 23

< 35

< 34

< 22

< 102

< 28 Swiss Chard 10/07/21

< 29

< 28

< 46

< 29

< 74

< 38

< 52

< 44

< 32

< 30

< 150

< 30 Turnip 10/07/21

< 25

< 19

< 57

< 25

< 50

< 20

< 47

< 38

< 26

< 113

< 32 Cabbage 10/07/21

< 22

< 23

< 47

< 18

< 51

< 24

< 37

< 24

< 25

< 98

< 25 Swiss Chard 10/21/21

< 26

< 28

< 56

< 32

< 73.

< 29

< 45

< 37

< 25

< 33

< 118

< 50 Kale 10/21/21

< 30

< 28

< 54

< 33

< 55

< 28

< 48

< 37

< 27

< 26

< 137

< 36 Cabbage 10/21/21

< 22

< 23

< 39

< 26

< 37

< 25

< 42

< 36

< 23

< 25

< 110

< 33 MEAN

Table C-X.1 Location Bu+

2021 Monitoring Quarterly MDDu Location Baseline, BQ (mrem)

(mrem)

Control BD-03 14.20 27.43 Ind - Far BD-02 13.50 26.73 BD-04 12.80 26.03 BD-05 14.40 27.63 Ind - Inner BD-101 13.50 26.73 BD-102 12.30 25.53 BD-103 13.10 26.33 BD-104 12.00 25.23 BD-105 12.50 25.73 BD-106 12.40 25.63 BD-107 13.00 26.23 BD-108 12.70 25.93 BD-109 16.10 29.33 BD-110 12.50 25.73 BD-111a 12.40 25.63 BD-112 12.40 25.63 BD-113a 13.20 26.43 BD-114 13.50 26.73 0

~

BD-115 13.10 26.33 BD-116 14.10 27.33 Ind - Outer BD-201 17.20 30.43 BD-202 13.20 26.43 BD-203 13.60 26.83 BD-204 12.00 25.23 BD-205 12.70 25.93 BD-206 13.20 26.43 BD-207 12.10 25.33 BD-208 13.10 26.33 BD-209 16.50 29.73 BD-210 15.40 28.63 BD-211 17.50 30.73 BD-212 13.50 26.73 BD-213 12.20 25.43 BD-214 15.40 28.63 BD-215 13.00 26.23 BD-216 14.70 27.93 Ind-Near BD-06 12.90 26.13 BD-19 14.50 27.73 BD-20 13.60 26.83 BD-21*

13.50 26.73 Other (ISFSI)

BD-ISFSl-104-3 15.90 29.13 BD-ISFSl-104-4 17.90 31.13 BD-ISFSl-105-3 19.40 32.63 BD-ISFSl-105-4 28.70 41.93 BD-ISFSl-110-3 20.80 34.03 BD-ISFSl-110-4 20.90 34.13 (1) SEE PROGRAM EXCEPTIONS SECTIONS FOR EXPLANATION QUARTERLY OSLO RESULTS FOR BRAIDWOOD STATION, 2021 RESULTS IN UNITS OF MREM/QUARTER +/- 2 STANDARD DEVIATIONS 2019 Normalized Net Dose, Quarterly Facility Dose, Fu Annual MQx (mrem/std. Qtr.)

(mrem)

Baseline, 1

I 2

I 3

I 4

1 I

2 I

3 I

4 BA (mrem) 15.8 18.1 18.3 18.9 ND ND ND ND 56.80 14.1 16.5 16.7 19.5 ND ND ND ND 54.20 13.7 15.7 15.7 19.5 ND ND ND NA 45.70 15.9 17.6 16.9 19.8 ND ND ND ND 57.80 14.9 17.4 16.9 18.8 ND ND ND ND 53.90 13.6 14.7 15.7 17.6 ND ND ND ND 49.00 15.3 16.8 16.8 19.2 ND ND ND ND 52.50 (1) 14.8 15.0 17.6 N/A ND ND ND 45.30 13.1 16.1 15.5 18.8 ND ND ND ND 50.10 13.3 15.0 16.7 18.0 ND ND ND ND 49.70 14.9 15.8 17.2 18.8 ND ND ND ND 52.10 13.6 14.7 14.9 18.7 ND ND ND ND 50.80 16.4 19.3 18.7 22.0 ND ND ND ND 64.40 14.0 15.3 15.7 18.0 ND ND ND ND 50.00 15.0 15.4 14.3 18.3 ND ND ND ND 49.60 14.4 15.7 15.7 18.7 ND ND ND ND 49.50 14.1 16.2 15.1 19.2 ND ND ND ND 52.90 15.0 17.2 16.0 18.4 ND ND ND ND 54.00 13.7 17.5 17.4 18.4 ND ND ND ND 52.40 14.9 17.5 17.0 19.0 ND ND ND ND 56.30 17.0 19.6 20.6 24.2 ND ND ND ND 68.70 13.6 16.4 16.5 19.5 ND ND ND ND 52.60 13.8 16.5 16.5 20.8 ND ND ND ND 54.50 13.4 15.6 15.2 17.7 ND ND ND ND 48.20 13.7 15.6 15.8 20.2 ND ND ND ND 50.60 15.0 16.3 16.7 18.9 ND ND ND ND 52.70 12.8.

15.4 14.6 19.0 ND ND ND ND 48.50 14.1 14.9 15.8 18.7 ND ND ND ND 52.30 16.6 18.5 21.5 21.4 ND ND ND ND 66.00 18.7 17.8 18.6 20.6 ND ND ND ND 61.70 17.5 19.3 21.4 24.7 ND ND ND ND 69.80 14.1 17.0 16.2 18.2 ND ND ND ND 54.00 13.9 14.9 15.5 17.9 ND ND ND ND 48.80 16.9 17.8 19.2 20.1 ND ND ND ND 61.50 14.5 16.8 16.8 18.6 ND ND ND ND 52.00 15.8 17.4 17.8 20.2 ND ND ND ND 58.70 14.0 15.8 16.2 18.3 ND ND ND ND 51.60 14.6 18.1 17.9 21.0 ND ND ND ND 58.10 14.9 17.7 16.9 18.9 ND ND ND ND 54.50 13.9 16.5 16.7 19.5 ND ND ND ND 53.90 19.4 20.6 16.0 24.8 ND ND ND ND 63.80 18.6 20.7 20.9 25.6 ND ND ND ND 71.6 21.4 23.4 23.8 26.6 ND ND ND ND 77.8 38.0 36.8 36.1 38.2 ND ND ND ND 114.8 16.7 21.2 19.0 23.4 ND ND ND ND 83.2 24.5 26.5 22.9 25.9 ND ND ND ND 83.4 ND= Non-Detect BA+

Normalized Annual MDDA Annual Dose, Facility (mrem)

MA (mrem/yr)

Dose, FA 109.87 71.06 ND 107.27 66.72 ND 98.77 45.05 ND 110.87 70.07 ND 106.97 68.03 ND 102.07 61.56 ND 105.57 68.14 ND 98.37 47.35 ND 103.17 63.47 ND 102.77 62.97 ND 105.17 66.73 ND 103.87 61.87 ND 117.47 76.35 ND 103.07 62.98 ND 102.67 62.99 ND 102.57 64.50 ND 105.97 64.60 ND 107.07 66.61 ND 105.47 67.00 ND 109.37 68.43 ND 121.77 81.33 ND 105.67 65.91 ND 107.57 67.54 ND 101.27 61.85 ND 103.67 65.22 ND 105.77 66.93 ND 101.57 61.76 ND 105.37 63.50 ND 119.07 77.97 ND 114.77 75.67 ND 122.87 82.86 ND 107.07 65.49 ND 101.87 62.17 ND 114.57 73.92 ND 105.07 66.71 ND 111.77 71.08 ND 104.67 64.29 ND 111.17 71.58 ND 107.57 68.43 ND 106.97 66.52 ND 116.87 80.75 ND 124.7 85.8 ND 130.9 95.1 ND 167.9 149.1 ND 136.3 80.3 ND 136.5 99.8 ND

0 I I\\)

(J1 TABLE C-X.2 MEAN QUARTLY OSLD RESULTS FOR THE INNER RING, OUTER RING, OTHER, CONTROL, AND INDEPENDENT SPENT FUEL STORAGE INSTALLATION (ISFSI) LOCATIONS FOR BRAIDWOOD STATION, 2021 RESULTS IN UNITS OF MREM/QUARTER +/- 2 STANDARD DEVIATION OF THE STATION DATA COLLECTION

, SITE BOUNDARY INTERMEDIATE DIST OTHER CONTROL ISFSI PERIOD

+/-2 S.D.

JAN-MAR 14.4 + 1.8 15.1 + 3.5 14.4+1.5 15.7 + 0.0 23.1 + 15.6 APR-JUN 16.2 + 2.6 16.8 + 2.9 16.8 + 1.9 18.1 + 0.0 24.8 + 12.5 JUL-SEP 16.1 + 2.3 17.4 + 4.5 16.7 + 1.4 18.3 + 0.0 23.1 + 13.9 OCT-DEC 18.7 + 2.0 20.0 + 4.0 19.5 + 1.6 18.9 + 0.0 16.4 + 1.3 TABLE C-X.3

SUMMARY

OF THE AMBIENT DOSIMETRY PROGRAM FOR BRAIDWOOD STATION, 2021 RESULTS IN UNITS OF MREM/QUARTER +/- 2 STANDARD DEVIATION SAMPLES PERIOD PERIOD PERIOD MEAN LOCATION ANALYZED MINIMUM MAXIMUM

+/-2 S.D.

SITE BOUNDARY 63 13.1 22.0 16.4 +/- 3.8 INTERMEDIATE DISTANCE 64 12.8 24.7 17.3+/-5.1 OTHER 28 13.7 21.0 16.9 +/- 3.9 CONTROL 4

15.7 18.9 17.8 +/- 2.8 ISFSI 24 15.5 38.0 21.9 +/- 13.1 SITE BOUNDARY STATIONS-BD-101, BD-102, BD-103, BD-104, BD-105, BD-106, BD-107, BD-108, BD-109, BD-110, BD-111A, BD-112 BD-113A, BD-114, BD-115, BD-116 INTERMEDIATE DISTANCE STATIONS - BD-201, BD-202, BD-203, BD-204, BD-205, BD-206, BD-207, BD-208, BD-209, BD-210, BD-211, BD-212, BD-213, BD-214, BD-215, BD-216 OTHER STATIONS - BD-02, BD-04, BD-05, BD-06, BD-19, BD-20, BD-21 CONTROL STATION - BD-03 ISFSI STATIONS - BD-ISFSl-104-3, BD-ISFSl-104-4, BD-ISFSl-1'05-3, BD-ISFSl-105-4, BD-ISFSl-110-3, BS-ISFSl-110-4

FIGURE C-1 Surface Water - Gross Beta - Stations BD-10 and BD-25 (C)

Collected in the Vicinity of Braidwood Station, 2000 - 2021 BD-10 Kankaee River, Downstream 10.0 8.0 6.0 4.0 2.0 0.0 -------------------------1 01-01-00 16.0 14.0 12.0 07-02-05 01-01-11 07-02-16 01-01-22 BD-25 (C) Kankakee River, Upstream 10.0

..J 6

8.0 C.

6.0 4.0 2.0 0.0 +----,-----1--------+-------+------1 01-01-00 07-02-05 01-01-11 07-02-16 01-01-22 DUE TO VENDOR CHANGE IN 2005, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE 2005 AND MDC VALUES AFTER JUNE 2005 C-26

FIGURE C-2 Surface Water - Gross Beta - Stations BD-38 and BD-40 Collected in the Vicinity of Braidwood Station, 2006 - 2021 BD-38 Main Drainage Ditch 14.0 12.0 10.0

-1 8.0 rj C.

6.0 4.0 2.0 0.0 ----------------------

..J 16.0 14.0 12.0 10.0 01-25-07 rj 8.0 C.

6.0 4.0 2.0 10-20-10 07-15-14 04-09-18 01-02-22 BD-40 Braidwood Station Cooling Lake 0.0 ----------------------------

10-05-06 07-28-10 05-20-14 03-12-18 01-02-22 C-27

FIGURE C-3 Surface Water - Gross Beta - Stations BD-55 and BD-56 Collected in the Vicinity of Braidwood Station, 2007 - 2021 BD-55 North Pond Fatlan Site 14.0 12.0 10.0

.J 8.0

~

Q.

6.0 4.0 2.0 0.0 01-25-07 10-20-10 07-15-14 04-09-18 01-02-22 BD-56 South Pond Fatlan Site 10.0 8.0 6.0 4.0 2.0 0.0 +--------+-----------------

01-25-07 10-20-10 07-15-14 04-09-18 01-02-22 GAPS IN DATA ARE DUE TO SAMPLING POINTS BEING FROZEN AT TIME OF COLLECTION C-28

FIGURE C-4 Surface Water - Tritium - Stations BD-10 and BD-25 (C)

Collected in the Vicinity of Braidwood Station, 2000 - 2021 BD-10 Kankakee River, Downstream 3000 2500 2000 1500 c3 C.

1000 500 0

03-25-00 09-03-05 02-12-11 07-23-16 01-01-22 BD-25 (C) Kankakee River, Upstream 400 300

-' 6 200 C.

100 0+----------tr---------+------+-------1 03-25-00 09-03-05 02-12-11 07-23-16 01-01-22 DUE TO VENDOR CHANGE IN 2005, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE 2005 AND MDC VALUES AFTER JUNE 2005 C-29

FIGURE C-5 Surface Water - Tritium - Stations BD-38 and BD-40 Collected in the Vicinity of Braidwood Station, 2006 - 2021 BD-38 Main Drainage Ditch 600 500 400 300 0

Q.

200 100 0

03-09-06 02-21-10 02-05-14 01-20-18 01-04-22 BD-40 Braidwood Station Cooling Lake 400 300

..J

~

200 Q.

100 0-------------------------1 07-20-06 05-31-10 04-11-14 02-20-18 01-01-22 C-30

FIGURE C-6 Surface Water - Tritium - Stations BD-55 and BD-56 Collected in the Vicinity of Braidwood Station, 2007 - 2021 BD-55 North Pond Fatlan Site 250 200 150

..J

~

Q.

100 50 0

03-29-07 12-06-10 08-15-14 04-24-18 01-01-22 BD-56 South Pond Fatlan Site 400 350 300 250

..J

~

200 Q.

150 100 50 0

03-29-07 12-06-10 08-15-14 04-24-18 01-01-22 C-31

FIGURE C-7 Public Water - Gross Beta - Station BD-22 Collected in the Vicinity of Braidwood Station, 2000 - 2021 BD-22 Wilmington 10.0 8.0 6.0 4.0 2.0 0.0 --------------+-------+------

01-29-00 07-23-05 01-15-11 07-09-16 DUE TO VENDOR CHANGE, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE 2005 AND MDC VALUES AFTER JUNE 2005 C-32 01-01-22

FIGURE C-8 Public Water - Tritium - Station BD-22 Collected in the Vicinity of Braidwood Station, 2000 - 2021

..J i3 C.

8000 7200 6400 5600 4800 4000 3200 2400 1600 800 0

01-29-00 07-23-05 BD-22 Wilmington 01-15-11 07-09-16 DUE TO VENDOR CHANGE, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE 2005 AND MDC VALUES AFTER JUNE 2005 C-33 01-01-22

FIGURE C-9 Ground/Well Water - Tritium - Stations BD-13 and BD-34 Collected in the Vicinity of Braidwood Station, 2000 - 2021

...J i1 C.

BD-13 Braidwood City Hall Well 500 400 300 200 100 0 ----------------+-----+---------1 01-07-00 05-31-04 10-23-08 03-17-13 08-09-17 01-01-22 BD-34 Gibs.on Well 700 600 500 400 300 200 100 0

01-07-00 05-31-04 10-23-08 03-17-13 08-09-17 01-01-22 DUE TO VENDOR CHANGE IN 2005, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE 2005 AND MDC VALUES AFTER JULY.

C-34

FIGURE C-10 Ground/Well Water - Tritium - Stations BD-35 and BD-36 Collected in the Vicinity of Braidwood Station, 2000 - 2021

...I

[)

C.

...I

[)

C.

BD-35 Joly Well 500 400 300 200

\\

100 0 +----"'----------~---....-------------'

01-07-00 05-31-04 10-23-08 03-17-13 08-09-17 01-01-22 BD-36 Hutton Well 1200 1000 800 600 400 200 0

01-07-00 05-31-04 10-23-08 03-17-13 08-09-17 01-01-22 DUE TO VENDOR CHANGE IN 2005, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE 2005 AND MDC VALUES AFTER JULY.

C-35

FIGURE C-11 Ground/Well Water - Tritium - Station BD-37 Collected in the Vicinity of Braidwood Station, 2000 - 2021 BD-37 Nurczyk Well 600 500 400

...J

[,

c.

300 200 100 0 +--~..;..o..t....--+------+----1------+-----------1 01-07-00 05-31-04 10-23-08 03-17-13 08-09-17 01-01-22 DUE TO VENDOR CHANGE IN 2005, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE 2005 AND MDC VALUES AFTER JULY.

C-36

FIGURE C-12 Ground/Well Water - Tritium - Station BD-50 and BD-51 Collected in the Vicinity of Braidwood Station, 2007 - 2021 BD-50 Skole Well 1000 900 800 700 600

! u 500 C.

400 300 200 100 0

01-01-07 10-02-10 07-03-14 04-03-18 01-02-22 STATION BD-50 WAS /NIT/ALLY DISCONTINUED ON 10/18107 AND RESUMED ON 04108/10 BD-51 Fatlan Well 600 500 400

! u 300 C.

200 100 0

01-03-07 10-04-10 07-05-14 04-05-18 01-04-22 C-37

FIGURE C-13 Ground/Well Water - Tritium - Station BD-54 Collected in the Vicinity of Braidwood Station, 2007 - 2021 BD-54 Cash Well 600 500 400

..J

(.)

300 C.

200 100 0

01-03-07 10-04-10 07-05-14 04-05-18 01-04-22 C-38

FIGURE C-14 Air Particulate - Gross Beta-Stations BD-03 (C) and BD-06 Collected in the Vicinity of Braidwood Station, 2000 - 2021 BD-03 (C) County Line Road 80.0 60.0 M

E

~

Q.

40.0 M

9 w

0...

20.0 0.0 +------+------+-------+-------1 01-07-00 60.0 50.0 i

40.0 0 Q.

~

30.0 w

0...

20.0 10.0 07-06-05 01-03-11 07-02-16 12-30-21 BD-06 Godley 0.0 ------------------------

01-07-00 07-06-05 01-03-11 07-02-16 12-30-21 C-39

FIGURE C-15 Air Particulate - Gross Beta-Stations BD-19 and BD-20 Collected in the Vicinity of Braidwood Station, 2000 - 2021 E

~

C.

9 w

0....

~

(_)

C.

9 w

0....

BD-19 Near Field, NW 60.0 50.0 40.0 30.0 20.0 10.0 0.0 +-------+------+-------+-----.......-l 01-07-00 07-06-05 01-03-11 07-02-16 12-30-21 BD-20 Near Field, N 70.0 60.0 50.0 40.0 30.0 20.0 10.0 0.0 +------+------+------+-------1 01-07-00 07-06-05 01-03-11 07-02-16 12-30-21 C-40

FIGURE C-16 Air Particulate - Gross Beta-Station BD-21 Collected in the Vicinity of Braidwood Station, 2000 - 2021 7.0.0 60.0 50.0 M

§ o

40.0 C.

M 9

w 30.0 0...

20.0 10.0 BD-21 Near Field, NE 0.0 +------+------+------1----------,

01-07-00 07-06-05 01-03-11 07-02-16 12-30-21 C-41

FIGURE C-17 Air Particulate - Gross Beta-Stations BD-02 and BD-04 Collected in the Vicinity of Braidwood Station, 2005 - 2021 60.0 50.0 C"I 40.0 E

0 Q.

C"I 30.0 9

w 0....

20.0 10.0 0.0 07-07-05 60.0 50.0 40.0 C"I

-E u

c.

30.0 C"I 9

w 20.0 10.0 BD-02 Near Field, NW 08-20-09 10-03-13 11-16-17 12-30-21 BD-04 Near Field, N 0.0 +--------+-------------------

07-07-05 08-20-09 10-03-13 11-16-17 12-30-21 C-42

FIGURE C-18 Air Particulate - Gross Beta-Station BD-05 Collected in the Vicinity of Braidwood Station, 2005 - 2021 BD-05 Near Field, NE 60.0 50.0 40.0 C")

E

~

30.0 C.

C")

9 w

0...

20.0 10.0 0.0 07-07-05 08-20-09 10-03-13 11-16-17 12-30-21 C-43

Intentionally left blank

APPENDIX D INTER-LABORATORY COMPARISON PROGRAM

Intentionally left blank

Analytics Environmental Radioactivity Cross Check Program Table D.1 Teledine Brown Engineering Environmental Services Identification TBE Known Ratio ofTBE to Month/Year Number Matrix Nuclide Units Reported Value (a)

Analytics Result Evaluation (b)

Value 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

1-131 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 1-131 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 of0.80-1.20 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 1 of 2)

Analytics Environmental Radioactivity Cross Check Program Table D.1 Teledx;ne Brown Engineering Environmental Services Identification TBE Known Ratio ofTBE to Month/Year Number Matrix Nuclide Units Reported Value (a)

Analytics Result Evaluation (b)

Value 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

1-131 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 1-131 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 D.2 DOE's Mixed Analyte Performance Evaluation Program (MAPEP)

Teled~ne Brown Engineering Environmental Services Identification TBE Known Acceptance Month/Year Matrix Nuclide Units Reported Evaluation (bl Number Value Value (a)

Range February 2021 21-GrF44 AP Gross Alpha Sq/sample 0.371 1.77 0.53 - 3.01 N<3l Gross Beta Sq/sample 0.731 0.65 0.325 - 0.974 A

21-MaS44 Soil Ni-63 Bq/kg 310 689.0 482 - 896 N\\"I 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 Sq/sample

. 3.13 3.60 2.5 - 4.7 A

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

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

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

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

Sr-90 Sq/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 Sq/sample 0.368 0.960 0.288 - 1.632 A

Gross Beta Sq/sample 0.595 0.553 0.277 - 0.830 A

21-MaS45 Soil Ni-63 Bq/kg 546 1280 896 - 1664 N\\0I Tc-99 Bq/kg 453 777 544-1010 N\\0I 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 Sq/sample 3.42 4.34 3.04-5.64 w

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

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

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

Mn-54 Sq/sample 0.035 (1)

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

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

(a) The MAPEPknown 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) DOEIMAPEP 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 (Page 1 of 1)

ERA Environmental Radioactivity Cross Check Program Table D.3 Teledyne Brown Engineering Environmental Services Identification TBE Known Acceptance Month/Year Number Matrix Nuclide Units Reported Value (a}

Limits Evaluation (bl Value March 2021 MRAD-34 Water Am-241 pCi/L 175 157 108 - 201 A

Fe-55 pCi/L 579 275 162 - 400 N111 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

1-131 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 pCilfilter 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\\L)

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 Nl"J 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

1-131 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 N1*1 H-3 pCi/L 17,500 17,800 15,600 - 19,600 A

(a) The ERA known value is equal to 100% of the param.eter 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 (Page 1 of 1)

APPENDIX E ERRATA DATA

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There was no errata data for 2021.

Intentionally left blank

APPENDIX F

ANNUAL RADIOLOGICAL GROUNDWATER PROTECTION PROGRAM REPORT (ARGPPR}

Intentionally left blank

Docket No:

50-456 50-457 BRAIDWOOD STATION UNIT 1 and UNIT 2 Annual Radiological Groundwater Protection Program Report 1 January through 31 December 2021 Prepared By Teledyne Brown Engineering Environmental Services

" Exelon Generation,,)

Braidwood Station Braceville, IL 60407 May 2022

Intentionally left blank

Table Of Contents I. Summary and Conclusions.............................................................................................. 1 II. Introduction...................................................................................................................... 2 A. Objectives of the RGPP........................................................................................ 2 B. Implementation of the Objectives........................................................................ 2 C. Program Description............................................................................................ 3 D. Characteristics of Tritium (H-3)............................................................................ 3 Ill. Program Description....................................................................................................... 4 A. Sample Analysis.................................................................................................. 4 B. Data Interpretation............................................................................................... 4 C. Background Analysis.............................................................................. _........... 5 IV. Results and Discussion.................... ;............................................................................ 7 A. Missed Samples.................................................................................................. 7 B. Groundwater Results..............................,............................................................. 7 C. Surface Water Results............'......................... -.................................................... 7 D. Summary of Results - Inter-laboratory Comparison Program............................ 8 E. Leaks, Spills, and Releases............................................ :.................................... 8 F. Trends................................................................................................................. 8 G. Investigations.................................................... :.............-.................................... 8 H. Actions Taken...................................................................................................... 8

Appendix A Tables Table A-1 Figures Figure A-1 Figure A-2 Appendix B Tables Table B-1.1 Table B-1.2 Table B-1.3 Table B-I1.1 Table B-I1.2 Appendices Location Designation Radiological Groundwater Protection Program - Sampling Locations, Braidwood Station, 2021 RGPP Groundwater Monitoring Well Sample Locations, Braidwood Station, 2021 RGPP Surface Water Sample Locations Braidwood Station, 2021 Data Tables Concentrations of Tritium, Strontium and Gross Alpha in Groundwater Samples Collected in the Vicinity of Braidwood Station, 2021 Concentrations of Gamma Emitters in Groundwater Samples Collected in the Vicinity of Braidwood Station, 2021 Concentrations of Hard-To-Detects in Groundwater Samples Collected as part of the Radiological Groundwater Protection Program in the Vicinity of Braidwood Station, 2021 Concentrations of Tritium in Surface Water Samples Collected in the Vicinity of Braidwood Station, 2021 Concentrations of Gamma Emitters in Surface Water Samples Collected in the Vicinity of Braidwood Station, 2021 ii

I.

Summary and Conclusions In 2021, Exelon continued a comprehensive program that evaluates the impact of station operations on groundwater and surface water in the vicinity of Braidwood Station. This report reviews groundwater and surface water samples collected from the environment, both on and off station property, in 2021. During that time period, 416 analyses were performed on 136 samples from 35 locations.

In assessing all the data gathered for this report, it was concluded that the operation of Braidwood Station had no adverse radiological impact on the environment.

Gamma-emitting radionuclides associated with licensed plant operations were not detected at concentrations greater than their respective Lower Limits of Detection (LLDs) as specified in the Offsite Dose Calculation Manual (ODCM) in any of the groundwater or surface water samples. In the case of tritium, Exelon specified that its laboratories achieve a lower limit of detection 10 times less than Braidwood's ODCM and 100 times less than federal regulation.

Strontium-89/90 (Sr-89/90) was not detected at a concentration greater than the LLD of 10.0 and 1.0 picocuries per liter (pCi/L) respectively in any of the groundwater samples tested.

No tritium (H-3) was detected in any sample at concentrations greater than the United States Environmental Protection Agency (USEPA) drinking water standard (and the Nuclear Regulatory Commission Reporting Limit) of 20,000 pCi/L. Low levels of tritium were detected in groundwater and surface water at concentrations greater than the LLD of 200 pCi/L in 46 of 127 samples. The tritium concentrations ranged from 183 +/- 112 pCi/L to 801 +/- 163 pCi/L. T~e tritium that was detected in the groundwater or surface water is believed to be the result of isolated historical releases and/or background from external sources greater than 200 pCi/L.

Gross Alpha analyses in the dissolved and suspended fractions were performed on groundwater water samples throughout the sampling year in 2021. Gross Alpha (dissolved) was detected in 2 groundwater samples with concentrations ranging from 1.4 +/- 0.8 pCi/L to 2.7 +/- 1.0 pCi/L. Gross Alpha (suspended) was detected in 3 groundwater samples with concentrations ranging from 2.4 +/- 1.2 pCi/L to 5.2 +/- 1.4 pCi/L.

Gross Alpha analyses in the dissolved and suspended fractions were not performed on surface water samples in 2021.

Hard-To-Detect analyses including iron-55 (Fe-55), nickel-63 (Ni-63),

americium-241 (Am-241 ), cerium-242 (Cm-242), cerium 243/244 (Cm-243/244),

plutonium-238 (Pu-238), plutonium-239/240 (Pu-239/240), uranium-234 (U-234),

uranium-235 (U-235) and uranium-238 (U-238) were performed on 4 sample locations in 2021. All HTD's were below required detection limits.

II.

Introduction The Braidwood Station, consisting of two 3,645 MWt pressurized water reactors owned and operated by Exelon Corporation is located in Will County, Illinois. Unit No. 1 went critical on May 29, 1987. Unit No. 2 went critical on March 08, 1988.

The site is located in northeastern Illinois, 20 miles south-southwest of Joliet, Illinois, 60 miles southwest of Chicago and southwest of the Kankakee River.

This report covers those analyses performed by Teledyne Brown Engineering (TBE) and Environmental Inc. Midwest Labs (EIML) on samples collected in 2021.

A.

Objective of the Radiological Groundwater Protection Program (RGPP)

The long-term objectives of the RGPP are as follows:

1. Identify suitable locations to monitor and evaluate potential impacts from station operations to preclude radiological impact to the environment and potential drinking water sources;

2. Understand the local hydrogeologic regime in the vicinity of the station and maintain up-to-date knowledge of flow patterns on the surface and shallow subsurface;

3. Perform routine water sampling and radiological analysis of water from selected locations;

4. Report new leaks, spills, or other detections with potential radiological significance to stakeholders in a timely manner;

5. Regularly assess analytical results to identify adverse trends;

6. Take necessary corrective actions to protect groundwater resources.

B.

Implementation of the Objectives The objectives identified have been implemented at Braidwood Station as discussed below:

1.

Exelon identified locations to monitor and evaluated potential impacts from station operations

2.

The Braidwood Station reports describe the local hydrogeologic regime.

Periodically, the flow patterns on the surface and shallow subsurface are updated based on ongoing measurements

3.

Braidwood Station will continue to perform routine sampling and radiological analysis of water from selected locations

4.

Braidwood Station has implemented procedures to identify and report new leaks, spills, or other detections with potential radiological significance in a timely manner

5.

Braidwood Station staff and consulting hydrogeologist assess analytical results on an ongoing basis to identify adverse trends C.

Program Description 1. Sample Collection Sample locations can be found in Table A-1 and Figures A-1 through A-5, Appendix A.

2.

Groundwater and Surface Water Samples of groundwater and surface water are collected, managed, transported and analyzed in accordance with EPA methods. Sample locations, sample collection frequencies and analytical frequencies are managed 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 as it is received. Additionally, analytical data results are reviewed by an independent hydrogeologist for adverse trends or changes to hydrogeologic conditions.

D.

Characteristics of Tritium (H-3)

Tritium is a radioactive isotope of hydrogen. Its chemical properties are the same as hydrogen. Tritiated water behaves the same as ordinary water in both the environment and the body. Tritiated water can be taken into the body by drinking water, breathing air, eating food or absorption through the skin. Once tritiated water enters the body, it disperses quickly and is uniformly distributed. Tritiated water is excreted primarily through urine with a clearance rate characterized by an effective biological half-life of about 14 days. With such a short biological half-life, an acute ingestion would be cleared rapidly. Organically bound tritium (tritium that is incorporated into carbon containing compounds) can remain in the body for a longer period.

Tritium is produced naturally in the upper atmosphere when cosmic rays interact with air molecules. Tritium is also produced during nuclear weapons explosions, as a by-product in reactors producing electricity and in special production reactors. 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 non-tritiated groundwater.

Ill.

Program Description A.

Sample Analysis This section describes the general analytical methodologies used by Teledyne Brown Engineering (TBE) and Environmental Incorporated Midwest Laboratory (EIML) to analyze the environmental samples for radioactivity for the Braidwood Station RGPP in 2021.

In order to achieve the stated objectives, the current program includes the following analyses:

1.

Concentrations of gamma emitters in groundwater and surface water

2.

Concentrations of strontium in groundwater and surface water

3.

Concentrations of tritium in groundwater and surface water

4.

Concentrations of Gross Alpha (Dissolved and Suspended) in groundwater and surface water

5.

Concentrations of Am-241 in groundwater

6.

Concentrations of Cm-242 and Cm-243/244 in groundwater

7.

Concentrations of Pu-238 and Pu-239/240 in groundwater

8.

Concentrations of U-234, U-235 and U-238 in groundwater

9.

Concentrations of Fe-55 in groundwater

10. Concentrations of Ni-63 in groundwater B.

Data Interpretation The radiological data collected prior to Braidwood Station becoming operational was used as a baseline with which these operational data was compared. For the purpose of this report, Braidwood Station was considered operational at initial criticality. Several factors were important in the interpretation of the data:

1.

Lower Limit of Detection and Minimum Detectable Concentration The lower limit of detection (LLD) is specified by federal regulation as 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 calibration standards, sample volume or weight measurements, sampling uncertainty and other factors. Exelon 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. Exelon reports the TPU by following the result with plus or minus (+/-) the estimated sample standard deviation, as TPU, that is obtained by propagating all sources of analytical uncertainty in measurements.

Analytical uncertainties are reported at the 95% confidence level in this report for reporting consistency with the AREOR.

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

For groundwater and surface water 14 nuclides, Be-7, K-40, Mn-54, Co-58, Fe-59, Co-60, Zn-65, Nb-95, Zr-95, 1-131, Cs-134, Cs-137, Ba-140 and La-140 were reported.

C.

Background Analysis A pre-operational radiological environmental monitoring program (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 the report entitled, Environmental Radiological Monitoring for Braidwood Nuclear Power Station Commonwealth Edison Company, Annual Report 1986, May 1987.

1.

Background Concentrations of Tritium The purpose of the following discussion is to summarize background measurements of tritium in various media performed by others.

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 lithium present in crystalline rocks by neutrons produced by the radioactive decay of naturally abundant uranium and thorium. Lithogenic production of tritium is usually negligible compared to other sources due to the limited abundance of lithium 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 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 USEPA's RadNet database. GNIP provides tritium precipitation concentration data for samples collected worldwide from 1960 to 2014. RadNet provides tritium precipitation concentration data for samples collected at stations throughout the U.S. from 1960 up to and including 2021. 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 up until 1975 followed by a gradual decline since that time. Tritium concentrations in Midwest precipitation 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 Tritium concentrations are routinely measured in large surface water bodies, including Lake Michigan and the Mississippi River.

Illinois surface water data were typically less than 100 pCi/L.

The USEPA Rad Net 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 Exelon-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. These sample results cannot be distinguished as different from background at this concentration.

IV.

Results and Discussion A.

Missed Samples There were no missed samples during 2021.

B.

Groundwater Results Samples were collected from on-and off-site wells throughout the year in accordance with the Station radiological groundwater protection program.

Analytical results and anomalies are discussed below:

Tritium Samples from all locations were analyzed for tritium activity. Tritium values ranged from the lower detection limit to 801 pCi/L.

(Tables B-1.1, Appendix B)

Strontium Thirty-six samples for analyzed for Sr-89 and Sr-90. Sr-89 was less than the required detection limit of 10.0 pCi/liter. Sr-90 was less than the required detection limit of 1.0 pCi/liter. (Table B-1.1, Appendix B)

Gross Alpha (dissolved and suspended)

Gross Alpha analyses in the dissolved and suspended fractions were performed on groundwater water samples throughout the sampling year in 2021. Gross Alpha (suspended) was detected in 2 groundwater samples with a concentration range of 1.4 +/- 0.8 pCi/L to 2.7 +/- 1.0 pCi/L. Gross Alpha (dissolved) was detected in 2 groundwater samples. The concentrations ranged from 2.4 +/- 1.2 pCi/L to 5.2 +/- 1.4 pCi/L.

(Table B-1.1, Appendix B)

Hard-To-Detect Hard-To-Detect analyses including Fe-55, Ni-63, Am-241, Cm-242, Cm-243/244, Pu-238, Pu-239/240, U-234, U-235 and U-238 were analyzed at 4 locations in 2021. All HTD's were less than required detection limits.

(Table B-1.3, Appendix B)

Gamma Emitters Naturally-occurring K-40 was detected in two samples with concentrations of 42 +/- 28 pCi/L and 72 +/- 33 pCi/L. No other gamma-emitting nuclides were detected in any of the samples analyzed. (Table B-1.2, Appendix B)

C.

Surface Water Results Samples were collected from two surface water locations throughout the year in accordance with the station radiological groundwater protection program. Analytical results and anomalies are discussed below:

Tritium Samples from all locations were analyzed for tritium activity. Tritium values were all less than the lower limit of detection. (Table B-I1.1, Appendix B)

D.

Summary of Results - Inter-Laboratory Comparison Program Inter-Laboratory Comparison Program results for TBE are presented in the AREOR.

E.

Leaks, Spills, and Releases There were no leaks, spills or releases to groundwater in 2021.

F.

Trends and Analyses Since June 2017, the CWBD House well tritium concentrations have been decreasing steadily. Monitoring of groundwater wells surrounding the plant indicate that tritium concentrations in affected areas near the Turbine Building have remained relatively unchanged since 2010.

G.

Investigations There were no new investigations in 2021.

H.

Actions Taken

1. Installation of Monitoring Wells Corrective actions taken in response to the CWBD House event included the placement of multiple monitoring wells at various depths in the vicinity of the CWBD house to determine soil contamination levels, as well as the establishment of soil remediation efforts to remove the tritium contamination from the area.

2. Compensatory Actions The discharges of the CWBD House remediation wells are treated as non-routine planned discharges. They are sampled regularly and permitted in the same manner as other ODCM pathways. The corresponding activity values are included as part of Table B-I.1 in this report.

3. Use of all remediation and support equipment from Exelon Braidwood Station property has stopped due to closure of the Braidwood Generating Station Consent Order No. 06 MR 248. Consent Order No.

06 MR 248 was terminated on May 14, 2020 by the Illinois Attorney General and Illinois Environmental Protection Agency.

APPENDIX A LOCATION DESIGNATION

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TABLE A-1: Radiological Groundwater Protection Program Sampling Locations, Braidwood Station, 2021 Station Code Samgle Descrigtion 0WM31P Drinking Water DITCH F (DS-2)

Surface Water MW-2 Monitoring Well MW-4 Monitoring Well MW-5 Monitoring Well MW-6 Monitoring Well MW-7 Monitoring Well MW-9 Monitoring Well MW-11 Monitoring Well MW-102R Monitoring Well MW-1410 Monitoring Well MW-1420 Monitoring Well MW-143D Monitoring Well MW-144D Monitoring Well MW-145D Monitoring Well MW-154 Background Weil MW-155 Background Well MW-159D Monitoring Well MW-162D Monitoring Well MW-BW-201S Monitoring Well MW-BW-202S Monitoring Well MW-BW-203S Monitoring Well MW-BW-207I Monitoring Well PS-7 Monitoring Well PS-8 Monitoring Well PS-9 Monitoring Well PS-10 Monitoring Well PS-11 Monitoring Well PS-12 Monitoring Well PS-13 Monitoring Well PS-14 Monitoring Well PS-15 Monitoring Well RW-6 Recovery Well RW-11 Recovery Well RW-12 Recovery Well SG-BW-102 DITCH C Surface Water VB1-1 Monitoring Well VB2-5DR Monitoring Well VB3-2 Monitoring Well VB5-2 Monitoring Well VB6-1 Monitoring Well VB?-1 Monitoring Well VB6-1 Monitoring Well VB7-1 Monitoring Well VB8-2R Monitoring Well VB9-1 Monitoring Well VB10-1R Monitoring Well VB11-1 Monitoring Well A-1

)>

I

+*

Explanation:

4 Surface Water Location Shallow Aquifer Monitoring Well lffl!I Intermediate Aquifer Monitoring Well VB6-1 VBS.2R' VB10-1R '

- ...,,c,,"!l!,cMc'\\+***y***~

.. ~

... -.,.,..,..,,,,,,:+,,f'"'"'1/4"'~'"">~'!i';

' VB?-1 '+,.

,***vB9-1 L.

V811*14~

0 4,000 8, 000 Feet Figure A-1 1,000 j

2.000 Feet CWBHArea RGPP Groundwater Monitoring Well Sample Locations Braidwood Station, 2021

'\\,

100\\,

Feet:,

RGPP Sample Locations Exelon Corporation Braidwood Generating Station

SURFACE WATER LOCATIONS TO BE: SAMPLED AS PART OF THE: RGPP Figure A-5 RGPP CWBD Monitoring Water Sample Locations Braidwood Station, 2021 A-3 1f3MH1 RESS ngure 1

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APPENDIX B DATA TABLES

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TABLE B-1.1 CONCENTRATIONS OF TRITIUM, STRONTIUM, AND GROSS ALPHA IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITIY OF BRAIDWOOD STATION, 2021 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE H-3 Sr-89 Sr-90 Gr-A (Dis)

Gr-A (Sus)

MW-2 03/29/21 452 +/- 135 MW-2 05/03/21 216 +/- 121 MW-2 09/05/21 332 +/- 128

< 4.0

< 0.7

< 0.5

< 0.4 MW-2 10/21/21 293 +/- 126 MW-4 03/29/21 463 +/- 134 MW-4 04/18/21 398 +/- 129 MW-4 07/15/21 394 +/- 133

< 8.9

< 0.9

< 1.2

< 0.9 MW-4 10/23/21 397 +/- 129 MW-5 03/29/21 192 +/- 121 MW-5 05/04/21

< 178 MW-5 07/20/21

< 189

< 6.5

< 0.9

< 0.7

< 0.9 MW-5 10/21/21

< 186 MW-6 03/29/21 451 +/- 129 MW-6 04/17/21 456 +/- 132 MW-6 07/20/21 563 +/- 140

< 8.7

< 1.0

< 1.8

< 1.0 MW-6 10/23/21 670 +/- 144 MW-7 03/30/21 353 +/- 127 MW-7 04/18/21 362 +/- 127 MW-7 07/15/21 194 +/- 126

< 8.7

< 0.9 0.5

< 0.9 MW-7 10/26/21 236 +/- 122 MW-11 03/30/21

< 187

< 0.8

< 0.5 MW-11 05/03/21

< 182

< 8.2

< 0.8

< 0.5 MW-11 09/16/21 239 +/- 123

< 4.8

< 0.9

< 1.4

< 0.9 MW-11 10/21/21 240 +/- 122 MW-102R 03/17/21

< 180 MW-102R 06/17/21

< 174 MW-102R 07/16/21

< 189

< 9.1

< 0.9

< 0.3

< 0.9 MW-1410 03/29/21 412 +/- 129 MW-1410 04/17/21 426 +/- 131 MW-1410 09/05/21 366 +/- 129

< 6.4

< 0.8

< 1.8

< 0.5 MW-1410 10/21/21 461 +/- 144 MW-1420 03/29/21 648 +/- 145 MW-1420 04/29/21 796 +/- 155 MW-142D 09/27/21 709 +/- 149

< 6.5

< 0.9

< 3.1

< 1.2 MW-1420 10/23/21 801 +/- 163 MW-143D 03/30/21 204 +/- 118 2.4 +/- 1.0 5.2 +/- 1.4 MW-143D 04/30/21

< 190

< 7.9

< 0.8 1.4+/- 0.8

< 1.3 MW-143D 09/14/21

< 176

< 4.7

< 0.8 2.7 +/- 1.0 2.4 +/- 1.2 MW-143D 10/26/21

< 185 MW-144D 03/29/21 197 +/- 117 MW-144D 05/04/21 183 +/- 112 MW-144D 09/16/21

< 187

< 8.4

< 0.8

< 0.7

< 0.9 MW-144D 10/21/21 281 +/- 127 MW-145D 03/24/21

< 181 MW-145D 06/06/21

< 192 MW-145D 09/14/21

< 183

< 4.4

< 0.8

< 0.6

< 0.7 MW-145D 12/13/21

< 189 MW-154 03/19/21

< 177

< 0.5

< 1.0 MW-154 04/25/21

< 184

< 9.1

< 1.0

< 0.5

< 1.0 BOLD Values = Unable to meet detection limits due to high solids content

TABLE B-I.1 CONCENTRATIONS OF TRITIUM, STRONTIUM, AND GROSS ALPHA IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITIY OF BRAIDWOOD STATION, 2021 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE H-3 Sr-89 Sr-90 Gr-A (Dis)

Gr-A (Sus)

MW-154 09/13/21

< 190

< 7.4

< 0.9

< 0.4

< 0.4 MW-154 10/24/21

< 180 MW-155 03/19/21

< 174

< 0.7

< 1.0 MW-155 04/25/21

< 188

< 9.4

< 0.9

< 0.7

< 1.0 MW-155 09/13/21

< 189

< 4.4

< 0.7

< 0.5

< 0.4 MW-155 10/24/21

< 192 MW-159D 03/12/21

< 180 MW-159D 04/30/21

< 185 MW-159D 09/27/21

< 184

< 5.2

< 0.9

< 2.5

< 0.9 MW-159D 10/21/21 257 +/- 131 MW-1620 03/12/21 227 +/- 119 MW-1620 04/30/21 311 +/- 128 MW-162D 09/30/21 268 +/- 138

< 4.2

< 0.9 0.7

< 0.7 MW-1620 10/21/21 316 +/- 127 MW-BW-201S 03/30/21 317 +/- 126 MW-BW-201S 04/30/21

< 191 MW-BW-201S 09/27/21

< 183

< 4.7

< 0.9

< 0.7 MW-BW-201S 10/21/21 242 +/- 121 MW-BW-202S 03/12/21

< 180 MW-BW-202S 04/30/21

< 182 MW-BW-202S 09/21/21 203 +/- 121

< 4.9

< 0.8

< 2.0

< 0.9 MW-BW-202S 10/21/21 334 +/- 131 MW-BW-203S 03/12/21

< 175 MW-BW-203S 04/18/21 234 +/- 122 MW-BW-203S 09/21/21

< 180

< 6.6

< 0.9

< 1.4

< 0.7 MW-BW-203S 10/23/21 229 +/- 129 M\\/V-BW-2071 03/31/21 596 +/- 141 MW-BW-2071 04/30/21 691 +/- 146 MW-BW-2071 07/20/21 684 +/- 150

< 8.4

< 0.8

< 1.5

< 0.9 MW-BW-2071 10/23/21 632 +/- 142 OWM31P 03/31/21

< 181 OWM31P 06/15/21

< 172 PS-10 03/17/21

< 177 PS-10 04/18/21

< 176 PS-10 07/16/21

< 185

< 7.7

< 0.9

< 0.8

< 0.9 PS-10 10/24/21

< 178 PS-12 03/17/21

< 178 PS-12 04/18/21

< 182 PS-12 07/16/21

< 184

< 9.4

< 0.9

< 0.6

< 0.9 PS-12 10/24/21

< 179 RW-6 03/19/21 252 +/- 121 RW-6 04/11/21

< 180 RW-6 07/16/21 221 +/- 122

< 8.7

< 0.7

< 1.8

< 2.2 RW-6 10/24/21 271 +/- 124 VB1-1 03/19/21

< 176 VB1-1 04/25/21

< 181 VB1-1 09/20/21

< 188

< 5.5

< 0.5

< 0.9

< 0.7 VB1-1 10/24/21

< 191 VB3-2 03/17/21

< 178 VB3-2 04/11/21

< 182 VB3-2 04/25/21

< 187

TABLE 8-1.1 CONCENTRATIONS OF TRITIUM, STRONTIUM, AND GROSS ALPHA IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITIY OF BRAIDWOOD STATION, 2021 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE H-3 Sr-89 Sr-90 Gr-A (Dis)

Gr-A (Sus)

VB3-2 07/16/21

< 186

< 8.9

< 0.9

< 0.5

< 0.9 VB3-2 10/24/21

< 191 VB5-2 03/24/21

< 180 VB5-2 05/06/21

< 183 VB5-2 06/06/21

< 189 VB5-2 09/14/21

< 188

< 4.0

< 0.9

< 0.7

< 2.7 VB5-2 12/13/21

< 196 VB6-1 03/24/21

< 180 VB6-1 05/06/21

< 183 VB6-1 06/06/21

< 187 VB6-1 09/14/21

< 184

< 3.8

< 0.8

< 0.7 VB6-1 12/13/21

< 167 VB7-1 03/24/21

< 182 VB7-1 06/06/21

< 188 VB7-1 09/14/21

< 189

< 6.0

< 0.9

< 0.8

< 0.7 VB7-1 12/13/21

< 179 VB8-2R 03/24/21

< 176 VB8-2R 06/06/21

< 188 VB8-2R 09/14/21

< 192 VB8-2R 09/29/21

< 6.8

< 0.8

< 0.9

< 0.5 VB8-2R 12/13/21

< 170 VB9-1 03/24/21

< 181 VB9-1 06/06/21

< 191 VB9-1 09/14/21

< 186

< 5.7

< 0.9

< 0.7 VB9-1 12/13/21

< 167 VB10-1R 03/24/21

< 181 VB10-1R 06/06/21

< 194 VB10-1 09/14/21

< 186

< 5.3

< 0.9

< 1.0

< 0.7 VB10-1R 12/13/21

< 170 VB11-1 03/24/21

< 178 VB11-1 06/16/21

< 185 VB11-1 09/14/21

< 189 VB11-1 09/29/21

< 6.5

< 0.9

< 1.1

< 0.5 VB11-1 12/13/21

< 172

TABLE B-1.2 CONCENTRATIONS OF GAMMA EMITTERS IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2021 RESULTS IN UNITS OF PC I/LITER+/- 2 SIGMA COLLECTION SITE DATE Be-7 K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 1-131 Cs-134 Cs-137 Ba-140 La-140 MW-2 09/05/21

< 15 53 +/- 22

< 1

<2

< 4

< 2

< 3

< 2

< 3

< 7

< 2

< 13

<4 MW-4 07/15/21

< 16

< 27

< 2

<4

< 2

< 3

< 2

< 3

< 5

< 2

< 12

<4 MW-5 07/20/21

< 17

< 34

< 2

< *4

< 2

< 4

< 2

< 3

<4

< 2

< 10

< 4 MW-6 07/20/21

. < 15

< 28

< 2

< 3

< 2

< 3

< 2

< 3

<4

< 2

< 9

< 3 MW-7 07/15/21

< 15

< 32

< 2

< 4

< 2

< 3

< 2

< 3

< 5

< 2

< 11

<4 MW-11 09/16/21

< 16

< 15

< 2

<4

< 2

< 3

< 2

< 3

< 8

< 2

< 14

< 5 MW-102R 07/16/21

< 19

< 39

< 2

<4

< 2

<4

< 2

< 4

< 6

< 2

< 14

< 4 MW-1410 09/05/21

< 15

< 1

< 3

< 1

< 3

< 2

< 3

< 6

< 2

< 1

< 13

<4 MW-142D 09/27/21

< 15 59 +/- 25

< 2

<4

< 2

< 3

< 2

< 3

<4

< 2

< 9

< 3 MW-143D 09/14/21

< 20

< 24

< 2

< 2.

< 5

< 2

< 5

< 3

<4

< 4

< 2

< 12

< 4 MW-144D 09/16/21

< 15

< 36

< 2

< 4

< 2

< 3

< 2

< 3

< 7

< 2

< 14

<4 MW-145D 09/14/21

< 16

< 28

< 2

< 4

< 2

< 3

< 2

< 3

< 4

< 2

< 9

< 3 MW-154 09/13/21

< 14

< 33

<2

< 2

< 4

< 2

< 3

< 2

< 3

< 2

< 9

< 3 MW-155 09/13/21

< 16

< 32

< 2

<4

< 2

< 3

< 2

< 3

< 4

< 2

< 9

< 3 MW-159D 09/27/21

< 13

< 34

< 2

<4

< 2

< 3

< 2

< 3

< 2

< 9

< 3 MW-162D 09/30/21

< 13 45 +/- 16

< 1

< 2

< 3

< 1

< 3

< 1

< 2

<4

< 2

< 1

< 9

< 3 MW-BW-201S 09/27/21

< 10

< 11

< 1

< 2

< 1

< 2

< 1

< 2

< 3

< 1

< 6

< 2 MW-BW-202S 09/21/21

< 17

< 31

< 2

<2

< 4

< 2

<4

< 2

< 3

< 6

<2

< 2

< 13

<4 MW-BW-203S 09/21/21

< 16

< 19

< 2

< 4

< 2

< 4

< 2

< 3

< 6

< 2

< 13

< 4 MW-BW-207I 07/20/21

< 15

< 2

<4

< 2

<4

< 2

< 3

<4

< 2

< 9

< 3 PS-10 07/16/21

< 15

< 30

< 2

<4

< 2

< 3

< 2

< 3

< 6

< 2

< 12

<4 PS-12 07/16/21

< 14

< 27

< 2

<4

< 2

< 3

<2

< 3

< 6

< 2

< 12

< 4 RW-6 07/16/21

< 16

< 2

< 4

< 2

< 3

< 2

< 3

< 5

< 2

< 12

<4 VB1-1 09/20/21

< 15

< 16

< 2

<4

< 2

<4

< 2

< 3

< 5

< 2

< 13

<4 VB3-2 07/16/21

< 17

< 21

< 2

<4

< 2

< 4

< 2

< 4

< 6

< 2

< 13

< 5 VB5-2 09/14/21

< 15 104 +/- 23

< 2

< 4

< 2

< 3

< 2

< 3

< 4

< 2

< 9

< 3 VB6-1 09/14/21

< 14

< 31

< 2

<4

< 2

< 3

< 2

< 3

< 2

< 9

< 3 VB7-1 09/14/21

< 15

< 31

< 2

< 3

< 2

< 3

<2

< 3

<4

< 2

< 9

< 3 VB8-2R 09/29/21

< 15

< 2

<4

< 2

< 3

<2

< 3

< 2

< 8

< 3 VB9-1 09/14/21

< 16

< 17

< 2

<4

< 2

< 4

< 2

< 3

<4

< 2

< 10

<4 VB10-1 09/14/21

< 11

< 19

< 1

< 3

< 1

< 2

< 1

< 2

< 3

< 1

< 7

< 2 VB11-1 09/29/21

< 29

< 30

<4

< 3

< 7

< 3

< 7

<4

<6

< 5

<4

< 3

< 15

< 5

TABLE B-1.3 CONCENTRATIONS OF HARD TO DETECTS IN GROUNDWATER SAMPLES COLLECTED AS PART OF THE RADl9LOGICAL GROUNDWATER PROTECTION PROGRAM, IN THE VICINITY OF BRAIDWOOD STATION, 2021 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE Fe-55 Ni-63 Am-241 Cm-242 Cm-243/244 Pu-238 Pu-239/240 U-234 U-235 U-238 MW-2 09/05/21

< 86

< 4.8 MW-4 07/15/21

< 73

< 4.4 MW-5 07/20/21

< 128

< 5.0 MW-6 07/20/21

< 107

< 4.5 MW-7 07/15/21

< 79

< 4.7 MW-11 03/30/21

< 0.11

< 0.03

< 0.09 0.08

< 0.15

< 0.05

< 0.11

< 0.05 MW-11 09/16/21

< 159

< 4.9 MW-102R 07/16/21

< 66

< 4.3 MW-1410 09/05/21

< 52

< 4.0 MW-1420 09/27/21

< 47

< 4.9 MW-143D 04/30/21

< 0.13

< 0.07

< 0.20 0.09

< 0.17

< 0.08

< 0.12

< 0.11 MW-143D 09/14/21

< 191

< 4.8 MW-144D 09/16/21

< 170

< 5.0 MW-145D 09/14/21

< 63

< 4.7 MW-154 04/25/21

< 0.14

< 0.16

< 0.05 0.07

< 0.04

< 0.17

< 0.11

< 0.11 MW-154 09/13/21

< 169

< 4.3 MW-155 04/25/21

< 0.05

< 0.03

< 0.07 0.08

< 0.13

< 0.12

< 0.13

< 0.09 MW-155 09/13/21

< 133

< 4.0 MW-159D 09/27/21

< 64

< 4.4 MW-1620 09/30/21

< 180

< 5.0 MW-BW-201S 09/27/21

< 183

< 4.4 MW-BW-202S 09/21/21

< 52

< 4.3 MW-BW-203S 09/21/21

< 94

< 3.9 MW-BW-207I 07/20/21

< 86

< 4.4 PS-10 07/16/21

< 148

< 4.2 PS-12 07/16/21

< 116

< 4.5 RW-6 07/16/21

< 186

< 4.5 VB1-1 09/20/21

< 187

< 4.3 VB3-2 07/16/21

< 53

< 4.3 VB5-2 09/14/21

< 87

< 4.8 VB6-1 09/14/21

< 51

< 4.0 VB7-1 09/14/21

< 51

< 3.8 VB8-2R 09/29/21

< 182

< 4.3 VB9-1 09/14/21

< 62

< 4.4 VB10-1 09/14/21

< 135

< 4.2 VB11-1 09/14/21

< 160

< 4.3

TABLE 8-11.1 CONCENTRATIONS OF TRITIUM IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2021 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE H-3 DITCH F (DS-2) 03/17/21

< 175 DITCH F (DS-2) 04/11/21

< 183 SG-BW-102 DITCH C 03/17/21

< 176 SG-BW-102 DITCH C 04/25/21

< 185

TABLE B-11.2 CONCENTRATIONS OF GAMMA EMITTERS IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2021 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA No samples collected or analyzed for gamma emitt,ers in 2021

BW220029, Annual Radiological Environmental Operating Report, 1 January Through 31 December 2021

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