Text

2022 Annual Radiological Environmental Operating Report (AREOR)
	ML23124A198
Person / Time
Site:	Byron
Issue date:	05/04/2023
From:	Welt H; Constellation Energy Generation
To:	; Office of Nuclear Reactor Regulation, Document Control Desk
References
	BYRON 2023-0022
	Download: ML23124A198 (1)
	v • d • e

Constellation May 4, 2023 L TR:

BYRON 2023-0022 File:

1 D.101 2C.111 United States Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001 Byron Station, Units 1 and 2 Constellat1on Energy Generation, LLC (CEG)

Byron Station 4450 N. German Church Road Byron, IL 61010-9794 www.constellationenergy.com Renewed Facility Operating License Nos. NPF-37 and NPF-66 NRC Docket Nos. STN 50-454 and STN 50-455

Subject:

2022 Annual Radiological Environmental Operating Report (AREOR)

In accordance with Technical Specification 5.6.2, "Annual Radiological Environmental Operating Report," we are submitting the Annual Radiological Environmental Operating Report (AREOR) for Byron Station, Units 1 and 2. This report is required to be submitted to the NRC by May 15th of each year and contains the results of the radiological environmental and meteorological monitoring programs. The Radioactive Effluent Release Report was submitted under separate cover.

Also included are the results of groundwater monitoring conducted in accordance with Constellation's Radiological Groundwater Protection Program (RGPP), which is a voluntary program implemented in 2006. This information is being reported in accordance with a nuclear industry initiative.

If you have any questions regarding this information, please contact Ms. Zoe Cox, Regulatory Assurance Manager, at (815) 406-2800.

Respectfully, Harris Welt Site Vice President Byron Generating Station HW/AH/JA/hh

Attachment:

AREOR Report cc:

Regional Administrator - NRC Region Ill

NRC.Docket No:

50-454 50-455 BYRON NUCLEAR GENERATING STATION UNITS 1 and 2 Annual Radiological Environmental Operating Report 1 January Through 31 December 2022 Prepared By Teledyne Brown Engineering Environmental Services Byron Nuclear Generating Station Byron, IL 61010 April 2023

Intentionally left blank

Table Of Contents I. Summary and Conclusions.............................................................................................. 1 II. Introduction...................................................................................................................... 2 A. Objectives of the REMP....................................................................................... 2 B. Implementation of the Objectives........................................................................ 2 Ill. Program Description....................................................................................................... 3 A. Sample Collection................................................................................................ 3 B. Sample Analysis.................................................................................................. 5 C. Data Interpretation............................................................................................... 6 D. Program Exceptions............................................................................................ 7 E. Program Changes............................................................................................... 7 IV. Results and Discussion................................................................................................. 8 A. Aquatic Environment........................................................................................... 8

1. Surface Water........................................................................................... 8

2. Ground Water........................................................................................... 8

3. Fish........................................................................................................... 9

4. Sediment................................................................................................... 9 B. Atmospheric Environment................................................................................. 10 1. Airborne.................................................................................................. 10

a. Air Particulates............................................................................. 1 O

b. Airborne Iodine............................................................................. 1 O

2. Terrestrial................................................................................................ 10

a. Milk............................................................................................... 10

b. Vegetation.................................................................................... 11 C. Ambient Gamma Radiation............................................................................... 11 D. Land Use Survey............................................................................................... 11 E. Errata Data........................................................................................................ 12 F. Summary of Results - Inter-laboratory Comparison Program........................... 12

- i -

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 Figure B-4 Figure B-5 Appendix C Tables Table C-1.1 Table C-1.2 Table C-1.3 Table C-I.4 Appendices Radiological Environmental Monitoring Report Summary Radiological Environmental Monitoring Program Annual Summary for Byron Nuclear Generating Station, 2022 Location Designation, Distance & Direction, and Sample Collection &

Analytical Methods Radiological Environmental Monitoring Program - Sampling Locations, Distance and Direction, Byron Nuclear Generating Station, 2022 Radiological Environmental Monitoring Program - Summary of Sample Collection and Analytical Methods, Byron Nuclear Generating Station, 2022 Inner Ring and Special Interest OSLO Locations of the Byron Nuclear Generating Station, 2022 Outer Ring OSLO Locations of the Byron Nuclear Generating Station, 2022 Onsite Air Sampling Locations of the Byron Nuclear Generating Station, 2022 Offsite Air Sampling Locations of the Byron Nuclear Generating Station, 2022 Ingestion and Waterborne Exposure Pathway Sampling Locations of the Byron Nuclear Generating Station, 2022 Data Tables and Figures Concentrations of Gross Beta in Surface Water Samples Collected in the Vicinity of Byron Nuclear Generating Station, 2022.

Concentrations of Tritium in Surface Water Samples Collected in the Vicinity of Byron Nuclear Generating Station, 2022.

Concentrations of Nickel-63 in Surface Water Samples Collected in the Vicinity of Byron Nuclear Generating Station, 2022 Concentrations of Gamma Emitters in Surface Water Samples Collected in the Vicinity of Byron Nuclear Generating Station, 2022 ii

Table C-I1.1 Concentrations of Tritium in Ground Water Samples Collected in the Vicinity of Byron Nuclear Generating Station, 2022 Table C-II.2 Concentrations of Gamma Emitters in Ground Water Samples Collected in the Vicinity of Byron Nuclear Generating Station, 2022 Table C-1I1.1 Concentrations of Nickel-63 and Gamma Emitters in Fish Samples Collected in the Vicinity of Byron Nuclear Generating Station, 2022 Table C-IV.1 Concentrations of Nickel-63 and Gamma Emitters in Sediment Samples Collected in the Vicinity of Byron Nuclear Generating Station, 2022 Table C-V.1 Concentrations of Gross Beta in Air Particulate Samples Collected in the Vicinity of Byron Nuclear Generating Station, 2022 Table C-V.2 Monthly and Yearly Mean Values of Gross Beta Concentrations in Air Particulate Samples Collected in the Vicinity of Byron Nuclear Generating Station, 2022 Table C-V.3 Concentrations of Gamma Emitters in Air Particulate Samples Collected in the Vicinity of Byron Nuclear Generating Station, 2022 Table C-Vl.1 Concentrations of 1-131 in Air Iodine Samples Collected in the Vicinity of Byron Nuclear Generating Station, 2022 Table C-Vll.1 Concentrations of 1-131 in Milk Samples Collected in the Vicinity of Byron Nuclear Generating Station, 2022 Table C-Vll.2 Concentrations of Gamma Emitters in Milk Samples Collected in the Vicinity of Byron Nuclear Generating Station, 2022 Table C-Vlll.1 Concentrations of Gamma Emitters in Vegetation Samples Collected in the Vicinity of Byron Nuclear Generating Station, 2022 Table C-IX.1 Quarterly OSLO Results for Byron Nuclear Generating Station, 2022 Table C-IX.2 Mean Quarterly OSLO Results for the Inner Ring, Outer Ring, Special Interest, Other and Control Locations for Byron Nuclear Generating Station, 2022 Table C-IX.3 Summary of the Ambient Dosimetry Program for Byron Nuclear Generating Station, 2022 Figures Figure C-1 Figure C-2 Figure C-3 Surface Water - Gross Beta - Stations BY-12 and BY-29 (C) Collected in the Vicinity of BNGS, 2000 - 2022 Surface Water - Tritium - Stations BY-12 and BY-29 (C) Collected in the Vicinity of BNGS, 2000 - 2022 Ground Water - Tritium - Station BY-14-1 Collected in the Vicinity of BNGS, 2000 - 2022 iii

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 Appendix D Tables Ground Water - Tritium - Station BY-18-1 Collected in the Vicinity of BNGS, 2010 - 2022 Ground Water - Tritium - Station BY-32 Collected in the Vicinity of BNGS, 2006 - 2022 Ground Water - Tritium - Station BY-35 Collected in the Vicinity of BNGS, 2006 - 2022 Ground Water - Tritium - Stations BY-37 and BY-38 Collected in the Vicinity of BNGS, 2006 - 2022 Air Particulate - Gross Beta - Stations BY-08 (C) and BY-21 Collected in the Vicinity of BNGS, 2000 - 2022 Air Particulate - Gross Beta - Stations BY-22 and BY-23 Collected in the Vicinity of BNGS, 2000 - 2022 Air Particulate - Gross Beta - Station BY-24 Collected in the Vicinity of BNGS, 2000 - 2022 Air Particulate - Gross Beta - Stations BY-01 and BY-04 Collected in the Vicinity of BNGS, 2005 - 2022 Air Particulate - Gross Beta - Station BY-06 Collected in the Vicinity of BNGS, 2005 - 2022 Inter-Laboratory Comparison Program Table 0-1 Analytics Environmental Radioactivity Cross Check Program Teledyne Brown Engineering, 2022 Table 0-2 DOE's Mixed Analyte Performance Evaluation Program (MAPEP)

Teledyne Brown Engineering, 2022 Table 0-3 ERA Environmental Radioactivity Cross Check Program Teledyne Brown Engineering, 2022 Appendix E Effluent Report Appendix E-1 Data Tables and Figures Appendix F Meteorological Data Appendix G Errata data Appendix H Annual Radiological Groundwater Protection Program Report (ARGPPR) iv

I.

Summary and Conclusions This report on the Radiological Environmental Monitoring Program conducted for the Byron Nuclear Generating Station by Constellation covers the period 1 January 2022 through 31 December 2022. During that time period, 1,426 analyses were performed on 1,268 samples. In assessing all the data gathered for this report and comparing these results with preoperational data, it was concluded that the operation of BNGS had no adverse radiological impact on the environment.

Surface water samples were analyzed for concentrations of gross beta, tritium (H-3), nickel-63 (Ni-63), and gamma-emitting nuclides. Ground water samples were analyzed for concentrations of tritium and gamma-emitting nuclides. Gross beta activities detected were consistent with those detected in previous years. All surface water samples analyzed for Ni-63 were less than the minimum detectable concentration. Tritium detected in downstream surface water was well below reportable limits and consistent with expected levels as a result of permitted liquid discharges.

Fish (commercially and/or recreationally important species) and sediment samples were analyzed for concentrations of Ni-63 and gamma-emitting nuclides.

Cesium-137 (Cs-137) was detected in one sediment sample. No other fission or activation products were detected in fish or in sediment samples.

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. All I-131 results were below the minimum detectable activity. No fission or activation products were found.

Food Product samples were analyzed for concentrations of gamma-emitting nuclides. No fission or activation products were detected.

Environmental gamma radiation measurements were performed quarterly using Optically Stimulated Luminescence Dosimeters (OSLO). Beginning in 2012, Exelon Nuclear changed the type of dosimetry used for the Radiological Environmental Monitoring Program (REMP). Optically Stimulated Luminescent Dosimetry were deployed, and Thermoluminescent Dosimetry (TLD) were discontinued. This change may have resulted 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).

II.

Introduction Byron Station, a two-unit PWR station, is located about two miles east of the Rock River and approximately three miles southwest of Byron in Ogle County, Illinois.

The reactors are designed to have capacities of 1,268 and 1,241 MW gross, respectively. Unit One loaded fuel in November 1984 and went online February 2, 1985. Unit Two went online January 9, 1987. The station has been designed to keep releases to the environment at levels below those specified in the codes of federal regulations.

This report covers those analyses performed by Teledyne Brown Engineering (TBE) and Landauer on samples collected during the period 1 January 2022 through 31 December 2022.

A.

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

1.

Provide 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 Ill.

Program Description A.

Sample Collection Samples for the BNGS REMP were collected for Constellation by Environmental Inc. (Midwest Labs). This section describes the general collection methods used by Environmental Inc. to obtain environmental samples for the BNGS REMP in 2022. Sample locations and descriptions can be found in Table B-1 and Figures B-1 through B-5, Appendix B.

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

Two gallon water samples were collected weekly from two surface water locations (BY-12 and BY-29 [Control location]) and quarterly from six ground water locations (BY-14-1, BY-18-1, BY-32, BY-35, BY-37 and BY-38). All samples were collected in new unused plastic bottles, which were rinsed with source water prior to collection. Fish samples comprising the flesh of freshwater drum, golden red horse, smallmouth red horse, silver redhorse and common carp were collected semiannually at two locations, BY-29 (control) and BY-31. Sediment samples composed of recently deposited substrate were collected at two locations semiannually, BY-12 and BY-34 (control).

Atmospheric Environment The atmospheric environment was evaluated by performing radiological analyses on samples of air particulate, and airborne iodine. Airborne iodine and particulate samples were collected and analyzed weekly at eight locations (BY-01, BY-04, BY-06, BY-08, BY-21, BY-22, BY-23 and BY-24).

The control location was BY-08. Airborne iodine and air particulate samples were obtained at each location, using a vacuum pump with charcoal and glass fiber filters attached. The pumps ran continuously and sampled air at the rate of approximately one cubic foot per minute. The air filters and air iodine samples were replaced weekly and sent to the laboratory for analysis.

Terrestrial Environment The terrestrial environment was evaluated by performing radiological analyses on samples of milk and food products. Milk samples were collected monthly from January through April and November through December, and biweekly May through October. The control location was BY-26-2 and the indicator location was BY-20-1. All samples were collected in new unused two gallon plastic bottles from the bulk tank at each location, preserved with sodium bisulfite and shipped promptly to the laboratory.

Food products were collected annually in July, August and October at five locations (BY-Control, BY-Quad 1, BY-Quad 2, BY-Quad 3 and BY-Quad 4). 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 Nuclear changed the type of dosimetry used for the Radiological Environmental Monitoring Program (REMP). Optically Stimulated Luminescent Dosimetry (OSLO) were deployed, and Thermoluminescent 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).

In recent years, the industry recognized the need for a standard method of reporting environmental dosimetry results. In 2018, Exelon Nuclear began assessing facility-related dose in accordance with ANSI N13.37-2014, Environmental Dosimetry - Criteria for System Design and Implementation.

This standard is applicable to passive environmental dosimetry systems used to monitor areas surrounding radiological facilities to assess potential facility-related radiation doses and to verify compliance with public dose limits. Such environmental dosimetry systems include dosimeters which accumulate radiation dose and any readout device required to process the dosimeters. Passive dosimeters include optically stimulated luminescence (OSL) dosimeters which are deployed at field locations around a facility and exchanged periodically (e.g., quarterly). Facility-related dose is calculated using a statistical model that uses baseline historical data and accounts for transit and deploy dose. In 2022, none of the Byron Station field locations listed in this report exhibited facility-related dose as calculated in accordance with this standard.

Each location consisted of 2 OSLO sets. The OSLDs were exchanged quarterly and sent to Landauer for analysis. The OSLDs were placed at locations on and around the BNGS Station site as follows:

An inner ring consisting of 16 locations (BY-101, BY-102, BY-103, BY-104, BY-105, BY-106, BY-107, BY-108, BY-109, BY-110, BY-111, BY-112, BY-113, BY-114, BY-115 and BY-116) near and within the site perimeter representing fence post doses (i.e., at locations where the doses will be potentially greater than maximum annual off-site doses) from BNGS releases.

An outer ring consisting of 16 locations (BY-201, BY-202, BY-203, BY-204, BY-205, BY-206, BY-207, BY-208, BY-209, BY-210, BY-211, BY-212, BY-213, BY-214, BY-215 and BY-216) extending to approximately 5 miles from the site designed to measure possible exposures to close-in population.

A special interest set consisting of seven locations (BY-301-1, BY-301-2, BY-309-1, BY-309-2, BY-309-3, BY-309-4, and BY-314-2) to measure possible exposures from on-site storage facilities.

An other set consisting of seven locations (BY-01, BY-04, BY-06, BY-21, BY-22, BY-23 and BY-24) at locations where air samplers are present.

The balance of one location (BY-08) representing the control area.

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, where estimated annual dose from BNGS, if any, would be most significant;

3.

On hills free from local obstructions and within sight of the vents (where practical);

4.

And near the closest dwelling to the vents in the prevailing downwind direction if applicable.

Two OSLDs were placed at each location above ground level. The OSLDs were exchanged quarterly and sent to Landauer for analysis.

B.

Sample Analysis This section describes the general analytical methodologies used by TBE to analyze the environmental samples for radioactivity for the BNGS REMP in 2022. The analytical procedures used by the laboratory 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 surface water and air particulates

2.

Concentrations of gamma emitters in ground and surface water, air particulates, milk, fish, sediment and vegetation

3.

Concentrations of tritium in ground and surface water

4.

Concentrations of iodine-131 in air and milk

5.

Concentrations of nickel-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 Byron Nuclear Generating Station becoming operational were used as a baseline with which these operational data were compared. For the purpose of this report, Byron Nuclear Generating Station was considered operational at initial criticality. In addition, data were 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 BNGS detection capabilities for environmental sample analysis.

The minimum detectable concentration (MDC) is defined above with the exception that the measurement is an after-the-fact estimate of the presence of activity.

2.

Net Activity Calculation and Reporting of Results Net activity for 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, effecting 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, ground water, milk and vegetation, 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 fish, sediment, and air particulates, 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 single analysis uncertainty.

D.

Program Exceptions For 2022, the BNGS 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 AP/Al BY-23 06/28/22 Sample holder was found not fully latched to the pump; filter light in color AP/Al BY-22 10/25/22 Pump found with low flow rate and no pressure; pump exchanged BY-22 4th Qtr.

One OSLO missing with high wind possible reason; OSLO BY-213-1 BY-213-4 2022 premises searched unsuccessfully.

TABLE D-2 LISTING OF MISSED SAMPLES Sample Location Collection Reason Type Code Date SW BY-29 01/04/22 Unable to collect water; river frozen

- 03/01/22 AP/Al BY-04 02/22/22 Power outage at the station; sample too small to collect OSLO BY-204-2 3rd Qtr.

OSLO missing; the pole removed together with the samples 2022 Each program exception was reviewed to understand the causes of the program exception. Sampling and maintenance errors were reviewed with the personnel involved to prevent recurrence. Occasional equipment breakdowns and power outages 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 2022.

IV.

Results and Discussion A.

Aquatic Environment

1.

Surface Water Samples were taken weekly and composited monthly at two locations (BY-12 and BY-29). Of these locations only BY-12 located downstream, could be affected by Byron Nuclear Generating Station's effluent releases. The following analyses were performed:

Gross Beta Samples from both locations were analyzed for concentrations of gross beta (Table C-1.1, Appendix C). The values ranged from 3.0 to 6.1 pCi/L. Concentrations detected were consistent with those detected in previous years (Figure C-1, Appendix C).

Tritium Quarterly composites of weekly collections were analyzed for tritium activity (Table C-1.2, Appendix C). Tritium was detected in two samples. (Figure C-2, Appendix C). The concentrations ranged from 492 to 1,360 pCi/L. Tritium detected in downstream surface water was well below reportable limits and consistent with expected levels as a result of permitted liquid discharges.

Nickel Samples from both locations were analyzed for concentrations of Ni-63 (Table C-1.3, Appendix C). All results were less than the minimum detectable concentration.

Gamma Spectrometry Samples from both locations were analyzed for gamma-emitting nuclides (Table C-1.4, Appendix C). No nuclides were detected, and all required LLDs were met.

2.

Ground Water Quarterly grab samples were collected at six locations (BY-14-1, BY-18-1, BY-32, BY-35, BY-37 and BY-38). These locations could be affected by Byron Nuclear Generating Station's effluent releases.

The following analyses were performed:

Tritium Quarterly grab samples from the locations were analyzed for tritium activity (Table C-I1.1, Appendix C). No tritium was detected, and the required LLD was met (Figures C-3 through C-7, Appendix C).

Gamma Spectrometry Samples from all locations were analyzed for gamma-emitting nuclides (Table C-I1.2 Appendix C). No nuclides were detected, and all required LLDs were met.

3.

Fish Fish samples comprised of freshwater drum, golden redhorse, smallmouth redhorse, silver redhorse and common carp were collected at two locations (BY-29 and BY-31) semiannually. Location BY-31 could be affected by Byron Nuclear Generating Station's effluent releases. The following analyses were performed:

Nickel The edible portion of fish samples from both locations was analyzed for Ni-63 (Table C-II1.1, Appendix C). Nickel-63 was not detected and the required LLD was met.

Gamma Spectrometry The edible portion of fish samples from both locations was analyzed for gamma-emitting nuclides (Table C-II1.1, Appendix C). No nuclides were detected, and all required LLDs were met.

4.

Sediment Aquatic sediment samples were collected at two locations (BY-12 and BY-34) semiannually. BY-12, located downstream, could be affected by Byron Nuclear Generating Station's effluent releases. The following analyses were performed:

Nickel Sediment samples from both locations were analyzed for Ni-63 (Table C-IV.1, Appendix C). Ni-63 was not detected and the required LLD was met.

Gamma Spectrometry Sediment samples from both locations were analyzed for gamma-emitting nuclides (Table C-IV.1, Appendix C). Cesium-137 (Cs-137) was detected in one sample at a concentration of 70 pCi/L. This nuclide is found occasionally in sediment at very low levels Gust above LLD) and is not distinguishable from background levels. No other fission or activation products were detected and all required LLDs were met.

B.

Atmospheric Environment

1. Airborne

a.

Air Particulates Continuous air particulate samples were collected from eight locations on a weekly basis. The eight locations were separated into three groups: Nearsite samplers within 4 km of the site (BY-21, BY-22, BY-23 and BY-24), Far Field samplers between 4 and 10 km of the site (BY-01, BY-04 and BY-06) and the Control sampler between 10 and 30 km from the site (BY-08). The following analyses were performed:

Gross Beta Weekly samples were analyzed for concentrations of beta emitters (Table C-V.1 and C-V.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 BNGS.

The results from the Nearsite locations (Group I) ranged from 6 to 46E-3 pCi/m3 with a mean of 20E-3 pCi/m3. The results from the Far Field locations (Group II) ranged from 7 to 46E-3 pCi/m3 with a mean of 20E-3 pCi/m3. The results from the Control location (Group Ill) ranged from 9 to 39E-3 pCi/m3 with a mean of 20E-3 pCi/m3. Comparison of the 2022 air particulate data with previous year's data indicate no effects from the operation of BNGS. In addition, a comparison of the weekly mean values for 2022 indicate no notable differences among the three groups.

(Figures C-8 through C-12, Appendix C)

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

b.

Airborne Iodine Continuous air samples were collected from eight locations (BY-01, BY-04, BY-06, BY-08, BY-21, BY-22, BY-23 and BY-24) and analyzed weekly for 1-131 (Table C-Vl.1, Appendix C). All results were less than the minimum detectable concentration for 1-131.

2.

Terrestrial

a. Milk Samples were collected from two locations (BY-20-1 and BY-26-2) monthly from January to April and November through December, and biweekly May through October. The following analyses were performed:

lodine-131 Milk samples from all locations were analyzed for concentrations of 1-131 (Table C-Vll.1, Appendix C). No nuclides were detected, and all required LLDs were met.

Gamma Spectrometry Each milk sample was analyzed for concentrations of gamma-emitting nuclides (Table C-Vll.2, Appendix C). No nuclides were detected, and all required LLDs were met.

b. Vegetation Vegetation samples were collected at five locations (BY-Control, BY-Quad 1, BY-Quad 2, BY-Quad 3 and BY-Quad 4). Four locations (BY-Quad 1, BY-Quad 2, BY-Quad 3 and BY-Quad 4) could be affected by Byron Nuclear Generating Station's effluent releases. The following analysis was performed:

Gamma Spectrometry Samples from all locations were analyzed for gamma-emitting nuclides (Table C-Vlll.1, Appendix C). No nuclides were detected, and all required LLDs were met.

C.

Ambient Gamma Radiation Ambient gamma radiation levels were measured utilizing OSLDs.

Ninety-one OSLO locations were established around the site. Results of OSLO measurements are listed in Tables C-IX.1 to C-IX.3, Appendix C.

All OSLO measurements were below 29 mR/standard quarter, with a range of 15 to 29 mR/standard quarter. A comparison of the Inner Ring, Outer Ring, Special Interest, Other and Control Location data indicate that the ambient gamma radiation levels were comparable among the groups.

D.

Land Use Survey A Land Use Survey conducted during August 2022 around the Byron Nuclear Generating Station (BNGS) was performed by Environmental Inc.

(Midwest Labs) for Constellation to comply with the Byron Nuclear Generating Station's Offsite Dose Calculation Manual. The purpose of the survey was to document the nearest resident, livestock, and milk producing animals in each of the sixteen 22 1/2 degree sectors. The results of this survey are summarized as follows:

Distance in Miles from the BNGS Vent Stacks Sector Residence Livestock Milk Farm Miles Miles Miles A

N 1.2 5.9 8

NNE 1.6 6.2 C

NE 1.1 2.0 D

ENE 1.4 3.7 E

E 1.0 4.2 F

ESE 1.5 1.5 G

SE 1.7 3.5 H

SSE 0.7 3.3 J

s 0.6 0.7 K

SSW 0.7 0.7 L

SW 0.8 2.0 M

wswaJ 1.6 0.8 4.5 N w 1.8 3.2 p

WNW 1.6 1.6 11.5 Q

NW 0.8 1.5 R

NNW 0.9 1.4 (a)

Denotes the nearest industrial facility located at 1.5 miles E.

Errata Data Please see Appendix G for 2021 ARERR errata data. There was no other errata data for 2022.

F.

Summary of Results - Inter-Laboratory Comparison Program The TBE Laboratory analyzed Performance Evaluation (PE) samples of air particulate, air iodine (charcoal), milk, soil, vegetation and water (including fish) matrices (Appendix D). The PE sample matrices were chosen based on the types of samples submitted to the primary laboratory for analysis.

The selected parameters for the PE samples are based on the appropriate matrices, methodologies and geometries, which include geometries that are comparable. The PE samples, supplied by Analytics Inc.,

Environmental Resource Associates (ERA) and DOE's Mixed Analyte Performance Program (MAPEP) were evaluated against the following pre-set acceptance criteria:

1.

Analytics Evaluation Criteria Analytics' evaluation report provides a ratio of laboratory results and Analytics' known value. Since flag values are not assigned by Analytics, TBE-ES evaluates the reported ratios based on internal QC requirements, which are based on the DOE MAPEP criteria.

2.

ERA Evaluation Criteria 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, NELAC, state specific 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 (MAPEPJ 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 TBE laboratory, 142 out of 150 analyses performed met the specified acceptance criteria. Eight analyses did not meet the specified acceptance criteria and were addressed through the TBE Corrective Action Program. NOTE: Two analyses (soil for Tc-99 and U-238) that did not meet acceptance criteria was performed for TBE information and is not on the list of required !GP analyses. A summary is found below:

1.

The Analytics March 2022 AP Ce-141 result was evaluated as Not Acceptable. The reported value for Ce-141 was 60.9 pCi and the known result was 42.0 pCi/L (1.45 ratio of reported result vs. known; TBE's internal acceptance range is 0.70 - 1.30). This sample was used as the workgroup duplicate with a result of 45.7 (109% of known) and was also counted on a different detector with a result of 50.9 (121 % of known). This was TBE's first failure for AP Ce-141.

(NCR 22-04)

2.

The MAPEP February 2022 Urine U-234 & U-238 results were evaluated as Not Acceptable. TB E's reported values of O.142 and 0.0254 were above the known upper ranges of 0.0096 and 0.0134 respectively for U-234 and U-238. These spiked values were below TBE's typical MDC for urine client samples. The samples were re-prepped using a larger sample aliquot and counted for 60 hours6.944444e-4 days 0.0167 hours 9.920635e-5 weeks 2.283e-5 months as opposed to 48 hours5.555556e-4 days 0.0133 hours 7.936508e-5 weeks 1.8264e-5 months . The recount results were 0.00732 for U-234 and 0.0119 for U-238 (both within acceptable range). MAPEP urine samples will be flagged to use a larger sample aliquot and counting time than typical client samples. MAPEP did not include any urine cross-check samples in August. (NCR 22-05)

3.

The ERA MRAD September 2022 AP Pu-238 was evaluated as Not Acceptable. The reported value was 38.8 pCi and the known result was 29.9 (acceptance range 22.6 - 36.7). The AP filter was cut in half prior to digestion (shared with Fe-55) but should have been complete digested together and aliquotted afterwards like typical client samples. This is the first failure for AP Pu-238. (NCR 22-19)

4.

The ERA October 2022 water Uranium result was evaluated as Not Acceptable. The reported value was 10.54 pCi/L and the known was 8.53 (acceptance range 6.60 - 9.88) or 124% of the known (acceptable for TBE QC). The 2-sigma error was 3.2, placing the reported result well within the acceptable range. This sample was used as the workgroup duplicate with a result of 8.2 +/- 2.9 pCi/L (also within the acceptable range). All other QA was reviewed with no anomalies. (NCR 22-20)

5.

The Analytics AP Co-60 result was evaluated as Not Acceptable. The reported value was 207 pCi and the known was 14 7 ( 141 % of the known). TBE's internal QC acceptance is 70 - 130%. All QA was reviewed with no anomalies. This sample was used as the workgroup duplicate and counted on a different detector with a result of 167 pCi (114% of the known). This is the first failure for AP Co average result ratio compared to the known is 109%. (NCR 22-21)

6.

The MAPEP August 2022 water Tc-99 result was evaluated as Not Acceptable. The reported value was 1.86 +/-0.414 Bq/L for this "false positive" test. The evaluation of the submitted result to the 3 times the uncertainty indicated a slight positive. This sample was used as the workgroup duplicate with a result of 0.88 +/- 0.374 Bq/L. All QC was reviewed, and no anomalies found. This is the first unacceptable since the resumption of reporting water Tc-99 for the 3rd quarter of 2020. TBE to known ratios have ranged from 94-109% during this time. (NCR 22-22)

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

APPENDIX A RADIOLOGICAL ENVIRONMENTAL MONITORING REPORT

SUMMARY

Intentionally left blank

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR BYRON NUCLEAR GENERATING STATION, 2022 NAME OF FACILITY:

BYRON NUCLEAR GENERATING STATION DOCKET NUMBER:

50-454 & 50-455 LOCATION OF FACILITY:

BYRON, IL REPORTING PERIOD:

2022 INDICATOR CONTROL REQUIRED LOCATIONS LOCATION LOCATION WITH HIGHEST ANNUAL MEAN (M)

NUMBER OF MEDIUM OR TYPES OF NUMBER OF LOWER LIMIT MEAN (M)

MEAN(M)

STATION#

NONROUTINE PATHWAY SAMPLED ANALYSIS ANALYSES OF DETECTION (F)

(F)

NAME REPORTED (Uint of Measurement)

PERFORMED PERFORMED (LLD)

RANGE RANGE RANGE DISTANCE AND DIRECTION MEASUREMENTS SURFACE WATER GR-8 22 4

5.2 4.6 5.2 BY-12 INDICATOR 0

(PCI/LITER)

(10112)

(8110)

(10112)

OREGON POOL OF ROCK RIVER - DOWNSTREAM 4.1-6.1 3.0- 6.0 4.1-6.1 4.5 MILES SSW OF SITE H-3 8

200 926

<LLD 1360 BY-12 INDICATOR 0

(214)

OREGON POOL OF ROCK RIVER - DOWNSTREAM 492-1360 492-1360 4.5 MILES SSW OF SITE Nl-63 22 30

<LLD

<LLD 0

GAMMA 22 MN-54 15

<LLD

<LLD 0

C0-58 15

<LLD

<LLD 0

FE-59 30

<LLD

<LLD 0

)>

CO-60 15

<LLD

<LLD 0

I 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

GROUND WATER H-3 24 200

<LLD NA 0

(PCI/LITER)

GAMMA 24 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

(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 BYRON NUCLEAR GENERATING STATION, 2022 NAME OF FACILITY:

BYRON NUCLEAR GENERATING STATION DOCKET NUMBER:

50-454 & 50-455 LOCATION OF FACILITY:

BYRON, IL REPORTING PERIOD:

2022 INDICATOR CONTROL REQUIRED LOCATIONS LOCATION LOCATION WITH HIGHEST ANNUAL MEAN (M)

NUMBER OF MEDIUM OR TYPES OF NUMBER OF LOWER LIMIT MEAN(M)

MEAN(M)

STATION#

NONROUTINE PATHWAY SAMPLED ANALYSIS ANALYSES OF DETECTION (F)

(F)

NAME REPORTED (Uint of Measurement)

PERFORMED PERFORMED (LLD)

RANGE RANGE RANGE DISTANCE AND DIRECTION MEASUREMENTS FISH Nl-63 8

260

<LLD

<LLD 0

(PCI/LITER)

GAMMA 8

MN-54 130

<LLD

<LLD 0

C0-58 130

<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

CS-134 130

<LLD

<LLD 0

CS-137 150

<LLD

<LLD 0

BA-140 NA

<LLD

<LLD 0

LA-140 NA

<LLD

<LLD 0

SEDIMENT Nl-63 4

260

<LLD

<LLD 0

)>

(PCIIKG DRY)

GAMMA 4

I I\\)

MN-54 NA

<LLD

<LLD 0

C0-58 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 70

<LLD 70 BY-12 INDICATOR 0

(112)

OREGON POOL OF ROCK RIVER - DOWNSTREAM BA-140 NA

<LLD

<LLD 4.5 MILES SSW OF SITE 0

LA-140 NA

<LLD

<LLD 0

AIR PARTICULATE GR-8 415 10 20 20 21 BY-04 INDICATOR 0

(E-3 PC/ICU.METER)

(3621363)

(52152)

(51151)

PAYNES POINT 6-46 9-39 7-46 5.0 MILES SE OF SITE GAMMA 32 MN-54 NA

<LLD

<LLD 0

C0-58 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 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.

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR BYRON NUCLEAR GENERATING STATION, 2022 NAME OF FACILITY:

BYRON NUCLEAR GENERA TING STATION DOCKET NUMBER:

50-454 & 50-455 LOCATION OF FACILITY:

BYRON, IL REPORTING PERIOD:

2022 INDICATOR CONTROL REQUIRED LOCATIONS LOCATION LOCATION WITH HIGHEST ANNUAL MEAN (M)

NUMBER OF MEDIUM OR TYPES OF NUMBER OF LOWER LIMIT MEAN(M)

MEAN (M)

MEAN(M)

STATION#

NON ROUTINE PATHWAY SAMPLED ANALYSIS ANALYSES OF DETECTION (F)

(F)

NAME REPORTED (Uint of Measurement)

PERFORMED PERFORMED (LLD)

RANGE RANGE RANGE DISTANCE AND DIRECTION MEASUREMENTS AIR IODINE GAMMA 415 (E-3 PC/ICU.METER) 1-131 (GELi) 70

<LLD

<LLD 0

MILK 1-131 (LOW LVL) 38 1

<LLD

<LLD 0

(PCI/LITER)

GAMMA MN-54 38 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

I

(.,)

CS-137 18

<LLD

<LLD 0

BA-140 60

<LLD

<LLD 0

LA-140 15

<LLD

<LLD 0

VEGETATION GAMMA 11 (PCIIKG WET)

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

/-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 DIRECT RADIATION OSLD-QUARTERL Y 331 NA 23.2 20.0 26.0 BY-107-2 INDICATOR 0

(MILLIREMIQTR.)

(327/327)

(4/4)

(4/4) 15-30 17-22 24-28 1.4 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 8 LOCATION DESIGNATION, DISTANCE & DIRECTION, AND SAMPLE COLLECTION & ANALYTICAL METHODS

Intentionally Left Blank

TABLE B-1:

Radiological Environmental Monitoring Program - Sampling Locations, Distance and Direction, Byron Nuclear Generating Station, 2022 Location A.

Surface Water BY-12 BY-29 B.

Ground/Well Water BY-14-1 BY-18-1 BY-32 BY-35 BY-37 BY-38 C.

Milk BY-20-1 BY-26-2 Location Description Oregon Pool of Rock River, Downstream Byron, Upstream (control) 3200 North German Church Road Calhoun Krueger Well VanckoWell CavageWell Steve Storz Well Ron Snodgrass Farm Joseph Akins Farm (control)

D.

Air Particulates/ Air Iodine BY-01 BY-04 BY-06 BY-08 BY-21 BY-22 BY-23 BY-24 E.

Fish BY-29 BY-31 F.

Sediment BY-12 BY-34 G.

Vegetation Quadrant 1 Quadrant2 Quadrant 3 Quadrant 4 Quadrant 4 Control Byron Paynes Point Oregon Leaf River ( control)

Byron Nearsite North Byron Nearsite Southeast Byron Nearsite South Byron Nearsite Southwest Byron, Upstream (control)

Byron, Discharge Oregon Pool of Rock River, Downstream Rock River, Upstream of Discharge (control) 5186 Cox Road, Stillman Valley 4834 Brick Road, Oregon 555 Park Rd, Oregon 4615 N Razorville Road., Byron 8547 Hedge Road, Byron 2327 Route 251, Rochelle H.

Environmental Dosimetry - OSLO Inner Ring BY-101-1 and -2 BY-102-1 BY-102-2 BY-103-1 and -2 BY-103-3 BY-104-1 and -2 BY-104-3 BY-105-1 and -2 BY-106-1 and -2 BY-107-1 and -2 BY-107-3 BY-108-1 BY-108-2 B-1 Distance & Direction From Site 4.5 miles SSW 3.0 miles N 1.0 miles SSE 0.7 miles SSW 1.9 miles W 1.9 miles WNW 2.0 miles WNW 2.0 miles WNW 4.8 miles WSW 12.2 miles WNW 3.0 miles N 5.0 miles SE 4.7 miles SSW 7.0 miles WNW 0.3 miles N 0.4 miles SE 0.6 miles S 0.7 miles SW 3.0 miles N 2.6 miles WNW 4.6 miles SSW 2.6 miles WNW 4.6 miles E 4.9 miles SE 3.7 miles SW 2.7 miles SW 4.4 miles NNW 20.7 miles SE 0.3 miles N 1.0 miles NNE 1.0 miles NNE 1.7 miles NE 0.4 miles NE 1.4 miles ENE 0.3 miles ENE 1.3 miles E 1.4 miles ESE 1.4 miles SE 0.4 miles SE 0.7 miles SSE 0.6 miles SSE

TABLE B-1:

Radiological Environmental Monitoring Program - Sampling Locations, Distance and Direction, Location BY-109-1 and -2 BY-110-1 and -2 BY-111-3 BY-111-4 BY-112-3 and -4 BY-113-1 and -2 BY-114-1 and -2 BY-115-1 and -2 BY-116-1 and-2 BY-116-3 Outer Ring BY-201-3 BY-201-4 BY-202-1 BY-202-2 BY-203-1 BY-203-2 BY-204-1 BY-204-2 BY-205-1 and -2 BY-206-1 BY-206-2 BY-207-1 BY-207-2 BY-208-1 BY-208-2 BY-209-1 and -4 BY-210-3 and -4 BY-211-1 and -4 BY-212-1 and -4 BY-213-1 BY-213-4 BY-214-1 BY-214-4 BY-215-1 BY-215-4 BY-216-1 BY-216-2 Special Interest BY-301-1 BY-301-2 BY-309-1 BY-309-2 BY-309-3 BY-309-4 BY-314-2 Other BY-01-1 and -2 BY-04-1 and -2 BY-06-1 and -2 BY-21-1 and -2 BY-22-1 and -2 BY-23-1 and -2 BY-24-1 and -2 Control BY-08-1 and -2 Byron Nuclear Generating Station, 2022 Location Description Distance & Direction From Site B-2 0.6 miles S 0.7 miles SSW 0.8miles SW 0.9miles SW 0.8 miles WSW 0.7 miles W 0.8 miles WNW 1.0 miles NW 1.4 miles NNW 0.9 miles NNW 4.4 miles N 4.4 miles N 4.4 miles NNE 4.8 miles NNE 4.8 miles NE 4.7 miles NE 4.1 miles ENE 4.0 miles ENE 3.8 miles E 4.0 miles ESE 4.3 miles ESE 4.2 miles SE 3.9 miles SE 4.0 miles SSE 3.8 miles SSE 4.0 miles S 3.9 miles SSW 4.9 miles SW 4.7 miles WSW 4.7milesW 4.7 milesW 4.7 miles WNW 4.6 miles WNW 4.2 miles NW 4.2 miles NW 4.5 miles NNW 4.7 miles NNW 0.3 miles N 0.2 miles N 0.3 miles S 0.4 miles S 0.4 miles S 0.4 miles SSW 0.3 miles WNW 3.0 miles N 5.0 miles SE 4.7 miles SSW 0.3 miles N 0.4 miles SE 0.6 miles S 0.7 miles SW 7.0 miles WNW

TABLE B-2:

Radiological Environmental Monitoring Program - Summary of Sample Collection and Analytical Methods, Byron Nuclear Generating Station, 2022 Sample Analysis Sampling Method Analytical Procedure Number Medium Surface Water Gamma Spectroscopy Monthly composite from TBE, TBE-2007 Gamma-Emitting Radioisotope Analysis weekly grab samples.

Surface Water Gross Beta Monthly composite from TBE, TBE-2008 Gross Alpha and/or Gross Beta Activity in weekly grab samples.

Various Matrices Surface Water Nickel-63 Monthly composite from TBE, TBE-2013 Radionickel Activity in Various Matrices weekly grab samples.

Surface Water Tritium Quarterly composite from TBE, TBE-2011 Tritium Analysis in Drinking Water by Liquid weekly grab samples.

Scintillation Ground Water Gamma Spectroscopy Quarterly grab samples.

TBE, TBE-2007 Gamma-Emitting Radioisotope Analysis Ground Water Tritium Quarterly grab samples.

TBE, TBE-2011 Tritium Analysis in Drinking Water by Liquid Scintillation Semi-annual samples Fish Gamma Spectroscopy collected via electroshocking TBE, TBE-2007 Gamma-Emitting Radioisotope Analysis or other techniques Semi-annual samples Fish Nickel-63 collected via electroshocking TBE, TBE-2013 Radionickel Activity in Various Matrices or other techniques Sediment Gamma Spectroscopy Semi-annual grab samples TBE, TBE-2007 Gamma-Emitting Radioisotope Analysis Sediment Nickel-63 Semi-annual grab samples TBE, TBE-2013 Radionickel Activity in Various Matrices One-week composite of TBE, TBE-2008 Gross Alpha and/or Gross Beta Activity in Air Particulates Gross Beta continuous air sampling Various Matrices through glass fiber filter paper Quarterly composite of Air Particulates Gamma Spectroscopy continuous air sapling TBE, TBE-2007 Gamma-Emitting Radioisotope Analysis through glass fiber filter paper One-week composite of Air Iodine Gamma Spectroscopy continuous air sampling TBE, TBE-2007 Gamma-Emitting Radioisotope Analysis through charcoal filter Bi-weekly grab sample when Milk 1-131 cows are on pasture.

TBE, TBE-2012 Radioiodine in Various Matrices Monthly all other times Bi-weekly grab sample when Milk Gamma Spectroscopy cows are on pasture.

TBE, TBE-2007 Gamma-Emitting Radioisotope Analysis Monthly all other times Vegetation Gamma Spectroscopy Annual grab samples.

TBE, TBE-2007 Gamma-Emitting Radioisotope Analysis Optically Stimulated Quarterly OSLDs comprised OSLO Luminescence of two Al2O3:C Landauer Landauer Incorporated Dosimetry Incorporated elements.

B-3

Figure B-1 Inner Ring and Special Interest OSLO Locations of the Byron Nuclear Generating Station, 2022 B-4

Leaf River z

Figure B-2 Outer Ring OSLO Locations of the Byron Nuclear Generating Station, 2022 B-5 Figure 6 3b Outer Ring Dosimeter Loca!iors Inner c.rcle distance = :i 7 m, Outer c,rcle distance = S O mi

l ~-. _,....

1 j

E REl'EREI\\ICE:

UNTED 8TA1913EC1I.OGIC IURIIEY 9111.lMM VAIJ.liY QLJADIWU.E. OR TOPOGRAPHIC. 7.11 MNllrES SERIES 1178 0

1-:f ll 112 1 KM I

I 1 MLE e AIR8AMPI.N3 L.CQI.TION Figure B-3 Onsite Air Sampling Locations of the Byron Nuclear Generating Station, 2022 B-6

' I

-r I

I

.-i I

J

-e,.L~,.,,

,'. ttn,;;..,,s.;,

Cl Cl AIR SAMPUNG UX'.ATION ll'r'RON STATION

2.

3 4

II e

11)KM$

OFFSITE DOSE CALCULATION MANUAL BYRON STATION FIGUREe.2 OFFSITE AIR SAMPLING LOCATIONS Figure B-4 Offsite Air Sampling Locations of the Byron Nuclear Generating Station, 2022 B-7

Q 0

I ~-~--

il'.iS,11 A

M!l.K 0

~tlfMl;Nf

+ WAfeR ll.'mOff!iTAfl(m Cl l"'lANT LIOUIO OISCHARill;:

OFFSITE oose: CALCULATION MANUAL BYRON STATION FIGURE 6-4 lNGE.STlON AND WATERBORNE EXPOSURE PAT!iWAY SAMPLE LOCATION$

Figure B-5 Ingestion and Waterborne Exposure Pathway Sampling Locations of the Byron Nuclear Generating Station, 2022 B-8

Intentionally left blank

APPENDIX C DATA TABLES AND FIGURES

Intentionally left blank

Table C-1.1 Table C-1.2 Table C-1.3 CONCENTRATIONS OF GROSS BETA IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF BYRON NUCLEAR GENERATING STATION, 2022 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION PERIOD BY-12 BY-29 01/04/22 -

01/25/22 6.1 +/- 2.3 (1) 02/01/22 -

02/22/22

< 2.9 (1) 03/01/22 03/29/22 5.4 +/- 2.2 4.7 +/- 2.2 04/05/22 04/26/22 5.5 +/- 2.0 4.3 +/- 1.9 05/03/22 -

05/31/22 4.6 +/- 2.2 6.0 +/- 2.3 06/07/22 -

06/28/22 4.6 +/- 2.6

< 3.7 07/05/22 -

07/26/22

< 2.1 3.0 +/- 1.6 08/02/22 -

08/30/22 4.8 +/- 2.6 4.0 +/- 2.5 09/06/22 -

09/27/22 5.9 +/- 2.6 5.0 +/- 2.6 10/04/22 10/25/22 4.1 +/- 2.2

< 3.0 11/01/22 11/29/22 5.8 +/- 2.1 5.6 +/- 2.1 12/06/22 - 12/20/22 5.4 +/- 1.8 4.7 +/- 1.7 MEAN+/- 2 STD DEV 5.2 +/- 1.3 4.6 +/- 1.8 CONCENTRATIONS OF TRITIUM IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF BYRON NUCLEAR GENERATING STATION, 2022 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION PERIOD 01 /04/22 -

03/29/22 04/05/22 -

06/28/22 07/05/22 09/27/22 10/04/22 -

12/20/22 MEAN+/- 2 STD DEV BY-12

< 186 1360 +/- 205

< 174 492 +/- 136 926 +/- 1228 BY-29

< 187

< 178

< 183

< 182 CONCENTRATIONS OF Nl-63 IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF BYRON NUCLEAR GENERATING STATION, 2022 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION PERIOD BY-12 BY-29 01/04/22 -

01/25/22

< 25 (1) 02/01/22 -

02/22/22

< 23 (1) 03/01/22 -

03/29/22

< 26

< 24 04/05/22 04/26/22

< 18

< 18 05/03/22 05/31/22

< 22

< 21 06/07/22 - 06/28/22

< 20

< 21 07/05/22 -

07/26/22

< 23

< 26 08/02/22 -

08/30/22

< 26

< 25 09/06/22 -

09/27/22

< 21

< 21 10/04/22 -

10/25/22

< 13

< 14 11/01/22 11/29/22

< 23

< 17 12/06/22 -

12/20/22

< 22

< 21 MEAN THE MEAN AND TWO STANDARD DEV/A TION ARE CALCULATED USING THE POSITIVE VALUES (1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION C-1

Table C-1.4 CONCENTRATIONS OF GAMMA EMITTERS IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF BYRON NUCLEAR GENERATING STATION, 2022 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 BY-12 01/04/22 - 01/25/22

< 2

< 5

< 2

< 5

< 3

<4

< 7

< 2

< 16

< 5 02/01 /22 - 02/22/22

< 1

< 2

< 3

< 2

< 3

< 2

< 3

<4

< 2

< 10

< 3 03/01/22 - 03/29/22

< 2

< 5

< 2

<4

< 2

< 4

< 7

< 2

< 18

< 5 04/05/22 - 04/26/22

< 2

< 3

< 6

< 3

< 5

< 3

< 5

< 7

< 3

< 15

< 6 05/03/22 - 05/31 /22

< 2

< 4

< 2

< 4

< 2

< 3

< 7

< 2

< 14

< 5 06/07122 - 06/28/22

< 2

< 5

< 2

< 4

< 2

< 4

<6

< 2

< 15

< 5 07 /05/22 - 07126/22

< 2

< 4

< 2

< 3

< 2

< 3

< 8

< 2

< 15

< 5 08/02/22 - 08/30/22

< 2

< 5

< 2

< 3

< 2

< 3

< 10

< 2

< 19

< 7 09/06/22 - 09/27 /22

< 2

< 3

< 5

< 3

< 5

< 3

< 5

< 7

< 3

< 2

< 15

< 5 10/04/22 - 10/25/22

< 3

< 6

< 2

< 5

< 3

< 6

< 8

< 3

< 20

< 5 11/01/22 - 11/29/22

<4

< 4

< 9

< 4

< 8

< 4

< 9

< 14

< 4

< 33

< 8 12/06/22 - 12/29/22

< 2

< 5

< 2

< 5

< 2

< 5

< 11

< 3

< 2

< 21

< 6 MEAN 0

I N

BY-29 01/04/22 - 01/25/22 (1) 02/01 /22 - 02/22/22 (1) 03/08/22 - 03/29/22

< 3

< 6

< 3

< 5

< 3

< 5

< 9

< 3

< 18

<6 04/05/22 - 04/26/22

< 2

< 5

< 2

< 5

< 2

<4

< 6

< 2

< 13

< 6 05/03/22 - 05/31 /22

< 2

< 5

< 2

<4

< 2

< 4

< 7

< 2

< 14

< 5 06/07122 - 06/28/22

< 3

< 6

< 2

< 5

< 3

< 5

< 7

< 3

< 17

< 5 07 /05/22 - 07126/22

< 2

< 4

< 2

< 3

< 2

< 3

< 9

< 2

< 15

< 5 08/02/22 - 08/30/22

< 1

< 4

< 2

< 3

< 2

< 3

< 9

< 1

< 15

< 5 09/06/22 - 09/27 /22

< 2

< 3

< 5

< 3

< 5

< 3

< 5

< 7

< 3

< 17

< 5 10/04/22 - 10/25/22

< 4

< 8

< 4

< 8

< 5

< 7

< 12

<4

< 27

< 9 11/01/22 - 11/29/22

< 3

< 4

< 8

< 3

< 7

<4

< 7

< 13

< 4

< 3

< 25

< 9 12/06/22 - 12/20/22

< 2

< 5

< 3

< 5

< 3

< 5

< 8

< 3

< 2

< 17

< 6 MEAN (1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION

Table C-11.1 CONCENTRATIONS OF TRITIUM IN GROUND WATER SAMPLES COLLECTED IN THE VICINITY OF BYRON NUCLEAR GENERATING STATION, 2022 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION PERIOD BY-14-1 BY-18-1 BY-32 BY-35 BY-37 BY-38 01/11/22 - 01/18/22

< 183

< 165

< 167

< 181

< 198

< 178 04/12/22 - 04/12/22

< 173

< 175

< 181

< 189

< 197

< 176 07/12/22 - 07/12/22

< 179

< 174

< 177

< 176

< 172

< 181 10/11/22 - 10/11/22

< 180

< 183

< 176

< 181

< 195

< 194 MEAN C-3

Table C-11.2 CONCENTRATIONS OF GAMMA EMITTERS IN GROUND WATER SAMPLES COLLECTED IN THE VICINITY OF BYRON NUCLEAR GENERATING STATION, 2022 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 BY-14-1 01/11/22 - 01/11/22

< 9

< 6

< 11

< 8

< 17

< 9

< 11

< 8

<9

< 8

< 32

< 12 04/12/22 - 04/12/22

< 4

< 5

< 10

< 4

< 10

< 6

< 9

<5

< 5

< 24

< 8 07/12/22 - 07/12/22

< 8

< 7

< 15

< 10

< 17

< 7

< 12

< 9

<8

< 6

< 33

< 7 10/11/22 - 10/11/22

< 7

< 8

< 17

< 7

< 16

< 8

< 13

< 11

<9

< 7

< 29

< 14 MEAN BY-18-1 01/11/22 - 01/11/22

< 8

< 16

< 7

< 18

< 9

< 13

< 9

<9

< 8

< 31

< 11 04/12/22 - 04/12/22

< 4

< 8

< 12

< 3

< 7

< 5

< 11

<5

< 5

< 31

< 10 07/12/22 - 07/12/22

<6

< 6

< 10

< 9

< 10

< 5

< 9

< 7

<7

< 7

< 36

< 7 10/11/22 - 10/11/22

< 6

< 5

< 10

< 7

< 15

< 9

< 10

< 11

<8

< 7

< 32

< 7 MEAN BY-32 01/11/22 - 01/11/22

< 6

< 10

< 8

< 9

< 6

< 9

< 7

<6

< 6

< 24

< 8 04/12/22 - 04/12/22

< 7

< 13

< 6

< 11

< 7

< 10

< 12

<7

< 8

< 42

< 8 0

07/12/22 - 07/12/22

< 8

< 15

< 8

< 13

< 8

< 10

< 12

< 10

< 7

< 31

< 7 I

.i::,.

10/11/22 - 10/11/22

< 6

< 7

< 11

< 10

< 15

< 9

< 13

< 10

<7

< 7

< 37

< 10 MEAN BY-35 01/11/22 - 01/11/22

< 5

< 8

< 13

< 6

< 10

< 8

< 10

< 7

<8

< 8

< 26

< 8 04/12/22 - 04/12/22

< 3

< 5

< 9

<4

< 10

<4

< 5

< 6

<4

< 5

< 16

< 6 07/12/22 - 07/12/22

< 6

< 7

< 13

< 6

< 14

< 7

< 11

< 9

<6

< 6

< 22

< 13 10/11 /22 - 10/11 /22

< 6

< 7

< 12

< 8

< 14

< 7

< 12

<8

< 7

< 26

< 9 MEAN BY-37 01/18/22 - 01/18/22

< 9

< 15

< 6

< 15

< 6

< 15

< 10

< 7

< 33

< 10 04/12/22 - 04/12/22

< 6

<4

< 10

< 6

< 9

< 5

< 10

< 7

<5

< 5

< 21

< 10 07/12/22 - 07/12/22

< 5

< 11

< 5

< 11

< 7

< 11

< 10

<6

< 5

< 34

< 12 10/11/22 - 10/11/22

<6

< 8

< 18

< 7

< 12

< 6

< 13

< 11

<7

< 6

< 35

< 11 MEAN BY-38 01/18/22 - 01/18/22

< 6

< 4

< 11

< 6

< 11

< 6

< 10

< 6

<6

< 6

< 18

< 6 04/12/22 - 04/12/22

< 6

< 5

< 11

< 5

< 12

< 5

< 9

< 8

<6

< 6

< 24

< 10 07/12/22 - 07/12/22

<6

< 6

< 12

< 10

< 14

< 7

< 12

< 10

<6

< 6

< 30

< 9 10/11/22 - 10/11/22

< 6

< 15

< 7

< 14

< 6

< 10

<8

< 7

< 28

< 8 MEAN

Table C-111.1 SITE BY-29 Freshwater Drum Golden Redhorse Freshwater Drum Smallmouth Redhorse BY-31 Freshwater Drum

()

Silver Redhorse I

(11 Common Carp Silver Redhorse COLLECTION CONCENTRATIONS OF NICKEL-63 AND GAMMA EMITTERS IN FISH SAMPLES COLLECTED IN THE VICINITY OF BYRON NUCLEAR GENERATING STATION, 2022 RESULTS IN UNITS OF PCI/KG WET+/- 2 SIGMA PERIOD Ni-63 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Cs-137 05/25/22 - 05/25/22

< 140

< 40

< 45

< 99

< 62

< 86

< 53

< 91

< 55

< 47 05/25/22 - 05/25/22

< 219

< 63

< 86

< 147

< 57

< 156

< 82

< 146

< 67

< 78 10/24/22 - 10/24/22

< 197

< 45

< 47

< 70

< 50

< 101

< 55

< 94

< 52

< 52 10/24/22 - 10/24/22

< 104

< 62

< 47

< 119

< 77

< 133

< 61

< 109

< 80

< 69 MEAN 05/25/22 - 05/25/22

< 128

< 28

< 60

< 109

< 48

< 119

< 52

< 110

< 54

< 52 05/25/22 - 05/25/22

< 170

< 81

< 62

< 144

< 53

< 159

< 73

< 114

< 72

< 59 10/24/22 - 10/24/22

< 144

< 46

< 47

< 95

< 67

< 109

< 56

< 87

< 55

< 56 10/24/22 - 10/24/22

< 142

< 46

< 53

< 112

< 76

< 112

< 61

< 108

< 43

< 49 MEAN Ba-140 La-140

< 269

< 73

< 317

< 93

< 234

< 57

< 293

< 96

< 275

< 134

< 350

< 114

< 220

< 94

< 249

< 98

C")

I O'>

Table C-IV.1 COLLECTION SITE PERIOD BY-12 05/17/22 - 05/17/22 10/25/22 - 10/25/22 MEAN BY-34 05/17/22 - 05/17/22 10/25/22 - 10/25/22 MEAN Ni-63

< 256

< 243

< 230 CONCENTRATIONS OF NICKEL-63 AND GAMMA EMITTERS IN SEDIMENT SAMPLES COLLECTED IN THE VICINITY OF BYRON NUCLEAR GENERATING STATION, 2022 RESULTS IN UNITS OF PCI/KG DRY+/- 2 SIGMA Mn-54

< 68

< 28

< 87 Co-58

< 53

< 63

< 38

< 60 Fe-59

< 123

< 145

< 46

< 121 Co-60 Zn-65

< 58

< 114

< 64

< 46

< 82

< 121

< 71

< 155 Nb-95

< 71

< 68

< 33

< 72 Zr-95

< 108

< 117

< 60

< 100 Cs-134

< 79

< 70

< 42

< 72 Cs-137

< 73

< 33

< 87 70 +/- 54 70 +/- 0 Ba-140 La-140

< 250

< 79

< 339

< 131

< 274

< 69

< 40

< 90

Table C-V.1 CONCENTRATIONS OF GROSS BETA IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF BYRON NUCLEAR GENERATING STATION, 2022 RESULTS IN UNITS OF E-3 PCI/CU METER+/- 2 SIGMA COLLECTION GROUP I GROUP II GROUP Ill PERIOD BY-21 BY-22 BY-23 BY-24 BY-01 BY-04 BY-06 BY-08 12/28/21 - 01/04/22 35 +/- 6 32 +/- 5 37 +/- 6 30 +/- 5 35 +/- 6 31 +/- 5 37 +/- 6 39 +/- 6 01/04/22 - 01/11/22 33 +/- 5 27 +/- 5 30 +/- 5 27 +/- 5 28 +/- 5 29 +/- 5 28 +/- 5 23 +/- 5 01/11/22 - 01/18/22 27 +/- 5 24 +/- 5 24 +/- 5 25 +/- 5 29 +/- 5 24 +/- 5 31 +/- 6 29 +/- 5 01/18/22 - 01/25/22 20 +/- 4 24 +/- 5 27 +/- 5 24 +/- 5 24 +/- 5 26 +/- 5 25 +/- 5 19 +/- 4 01/25/22 - 02/01/22 24 +/- 5 27 +/- 5 24 +/- 5 20 +/- 4 18 +/- 4 21 +/- 5 23 +/- 5 20 +/- 4 02/01/22 - 02/08/22 28 +/- 5 27 +/- 5 27 +/- 5 28 +/- 5 26 +/- 5 25 +/- 5 26 +/- 5 24 +/- 5 02/08/22 - 02/15/22 23 +/- 5 30 +/- 7 22 +/- 5 19 +/- 4 17 +/- 4 19 +/- 5 18 +/- 4 16 +/- 4 02/15/22 - 02/22/22 24 +/- 5 32 +/- 7 25 +/- 5 20 +/- 4 23 +/- 5 (1) 24 +/- 5 21 +/- 4 02/22/22 - 03/01 /22 24 +/- 5 24 +/- 5 19 +/- 4 18 +/- 4 19 +/- 4 20 +/- 5 20 +/- 5 20 +/- 5 03/01 /22 - 03/08/22 21 +/- 5 19 +/- 4 21 +/- 4 20 +/- 5 20 +/- 5 21 +/- 5 22 +/- 5 20 +/- 5 03/08/22 - 03/15/22 20 +/- 5 19 +/- 5 15 +/- 4 17 +/- 4 16 +/- 4 17 +/- 4 17 +/- 4 17 +/- 4 03/15/22 - 03/22/22 15 +/- 4 20 +/- 5 17 +/- 4 18 +/- 5 20 +/- 5 14 +/- 4 20 +/- 5 17 +/- 5 03/22/22 - 03/29/22 6 +/- 3 9 +/- 4 8 +/- 4 11 +/- 4 8 +/- 4 11 +/- 4 9 +/- 4 13 +/- 4 03/29/22 - 04/05/22 10 +/- 4 10 +/- 4 11 +/- 4 12 +/- 4 12 +/- 4 12 +/- 4 12 +/- 4 11 +/- 4 04/05/22 - 04/12/22 10 +/- 4 12 +/- 4 9 +/- 3 11 +/- 4 9 +/- 4 12 +/- 4 10 +/- 4 9 +/- 4 04/12/22 - 04/19/22 10 +/- 4 13 +/- 4 13 +/- 4 12 +/- 4 11 +/- 4 11 +/- 4 9 +/- 4 13 +/- 5 04/19/22 - 04/26/22 9 +/- 4 13 +/- 4 9 +/- 4 11 +/- 4 8 +/- 4 9 +/- 4 9 +/- 4 12 +/- 4 04/26/22 - 05/03/22 12 +/- 4 11 +/- 4 16 +/- 4 12 +/- 4 12 +/- 4 19 +/- 5 12 +/- 4 12 +/- 4 05/03/22 - 05/10/22 12 +/- 4 10 +/- 4 11 +/- 4 10 +/- 4 9 +/- 4 14 +/- 4 15 +/- 4 11 +/- 4 05/10/22 - 05/17/22 23 +/- 5 22 +/- 5 26 +/- 5 26 +/- 5 25 +/- 5 21 +/- 5 22 +/- 5 21 +/- 5 05/17/22 - 05/24/22 13 +/- 4 11 +/- 4 13 +/- 4 12 +/- 4 11 +/- 4 10 +/- 4 14 +/- 4 15 +/- 4 05/24/22 - 05/31/22 14 +/- 4 11 +/- 4 13 +/- 4 18 +/- 4 16 +/- 4 13 +/- 4 13 +/- 4 9 +/- 4 05/31/22 - 06/07/22 15 +/- 4 16 +/- 4 16 +/- 4 15 +/- 4 16 +/- 4 16 +/- 4 14 +/- 4 13 +/- 4 06/07/22 - 06/14/22 13 +/- 4 17 +/- 4 19 +/- 4 15 +/- 4 19 +/- 4 19 +/- 4 16 +/- 4 20 +/- 4 06/14/22 - 06/21/22 14 +/- 4 16 +/- 4 12 +/- 4 13 +/- 4 16 +/- 4 12 +/- 4 14 +/- 4 16 +/- 4 06/21/22 - 06/28/22 15 +/- 4 10 +/- 4

< 4 12 +/- 4 12 +/- 4 15 +/- 4 12 +/- 4 12 +/- 4 06/28/22 - 07/05/22 15 +/- 4 16 +/- 4 19 +/- 4 15 +/- 4 17 +/- 4 16 +/- 4 17 +/- 4 19 +/- 4 07/05/22 - 07/12/22 11 +/- 4 11 +/- 4 11 +/- 4 12 +/- 4 13 +/- 4 7 +/- 4 10 +/- 4 12 +/- 4 07/12/22 - 07/19/22 15 +/- 4 13 +/- 4 11 +/- 4 12 +/- 4 17 +/- 4 16 +/- 5 15 +/- 4 13 +/- 4 07/19/22 - 07/26/22 21 +/- 4 18 +/- 4 13 +/- 4 19 +/- 4 20 +/- 4 22 +/- 5 20 +/- 4 19 +/- 4 07/26/22 - 08/02/22 13 +/- 4 11 +/- 4 14 +/- 4 14 +/- 4 16 +/- 5 15 +/- 4 10 +/- 4 17 +/- 5 08/02/22 - 08/09/22 9 +/- 4 13 +/- 4 10 +/- 4 14 +/- 4 11 +/- 4 12 +/- 4 10 +/- 4 13 +/- 4 08/09/22 - 08/16/22 16 +/- 4 14 +/- 4 15 +/- 4 15 +/- 4 16 +/- 4 36 +/- 9 13 +/- 4 13 +/- 4 08/16/22 - 08/23/22 21 +/- 4 18 +/- 4 26 +/- 5 18 +/- 4 19 +/- 4 26 +/- 5 21 +/- 4 22 +/- 4 08/23/22 - 08/30/22 16 +/- 4 23 +/- 4 23 +/- 4 20 +/- 4 22 +/- 4 46 +/- 9 24 +/- 4 27 +/- 5 08/30/22 - 09/06/22 12 +/- 4 16 +/- 4 17 +/- 4 18 +/- 4 17 +/- 4 27 +/- 8 13 +/- 4 17 +/- 4 09/06/22 - 09/13/22 21 +/- 4 19 +/- 4 17 +/- 4 26 +/- 5 19 +/- 4 20 +/- 4 19 +/- 4 24 +/- 4 09/13/22 - 09/20/22 27 +/- 5 26 +/- 5 28 +/- 5 30 +/- 5 24 +/- 5 25 +/- 5 26 +/- 5 32 +/- 5 09/20/22 - 09/27/22 21 +/- 4 18 +/- 4 19 +/- 4 23 +/- 4 19 +/- 4 17 +/- 4 19 +/- 4 20 +/- 4 09/27 /22 - 10/04/22 13 +/- 4 12 +/- 4 11 +/- 4 12 +/- 4 16 +/- 4 13 +/- 4 11 +/- 4 14 +/- 4 10/04/22 - 10/11/22 23 +/- 5 18 +/- 5 23 +/- 5 20 +/- 5 22 +/- 5 24 +/- 5 19 +/- 5 22 +/- 5 10/11/22 - 10/19/22 16 +/- 4 28 +/- 8 16 +/- 4 18 +/- 4 14 +/- 4 16 +/- 4 16 +/- 4 13 +/- 4 10/19/22 - 10/25/22 35 +/- 6 33 +/- 7 34 +/- 6 34 +/- 6 39 +/- 6 29 +/- 6 33 +/- 6 38 +/- 6 10/25/22 - 11/01/22 23 +/- 4 28 +/- 5 27 +/- 5 30 +/- 5 28 +/- 5 24 +/- 5 23 +/- 5 32 +/- 5 11/01/22 - 11/08/22 32 +/- 5 33 +/- 5 33 +/- 5 40 +/- 5 36 +/- 5 34 +/- 5 31 +/- 5 29 +/- 5 11/08/22 - 11/15/22 16 +/- 4 11 +/- 4 13 +/- 4 15 +/- 4 17 +/- 4 18 +/- 4 19 +/- 4 17 +/- 4 11/15/22 - 11/22/22 21 +/- 4 19 +/- 4 23 +/- 4 20 +/- 4 22 +/- 5 21 +/- 4 15 +/- 4 23 +/- 5 11/22/22 - 11/29/22 37 +/- 5 42 +/- 6 46 +/- 6 45 +/- 6 44 +/- 6 35 +/- 5 38 +/- 5 38 +/- 6 11/29/22 - 12/06/22 23 +/- 5 24 +/- 5 26 +/- 5 26 +/- 5 26 +/- 5 27 +/- 5 25 +/- 5 28 +/- 5 12/06/22 - 12/13/22 31 +/- 5 35 +/- 5 34 +/- 5 33 +/- 5 32 +/- 5 36 +/- 5 31 +/- 5 31 +/- 5 12/13/22 - 12/20/22 25 +/- 5 23 +/- 4 28 +/- 5 20 +/- 4 21 +/- 4 25 +/- 5 23 +/- 5 25 +/- 5 12/20/22 - 12/27/22 25 +/- 4 20 +/- 4 26 +/- 4 27 +/- 5 23 +/- 4 26 +/- 4 23 +/- 4 25 +/- 4 MEAN +/- 2 STD DEV 19 +/- 15 20 +/- 16 20 +/- 17 20 +/- 16 20 +/- 16 21 +/- 16 19 +/- 15 20 +/- 15 THE MEAN AND TWO STANDARD DEVIATION ARE CALCULATED USING THE POSITIVE VALUES (1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION C-7

Table C-V.2 MONTHLY AND YEARLY MEAN VALUES OF GROSS BETA CONCENTRATIONS IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF BYRON NUCLEAR GENERATING STATION, 2022 RESULTS IN UNITS OF E-3 PCI/CU METER+/- 2 SIGMA GROUP I - NEARS I TE 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 PERIOD

+/-2SD 12/28/21 - 02/01 /22 20 37 27 +/- 9 12/28/21 - 02/01/22 18 37 27 +/- 10 12/28/21 - 02/01/22 19 39 26 +/- 17 02/01/22 - 03/01/22 18 32 24 +/- 8 02/01/22 03/01/22 17 26 22 +/- 7 02/01/22 - 03/01/22 16 24 20 +/- 6 03/01 /22 - 03/29/22 6

21 16 +/- 10 03/01/22 03/29/22 8

22 16 +/- 9 03/01 /22 - 03/29/22 13 20 17 +/- 6 03/29/22 - 05/03/22 9

16 11 +/- 3 03/29/22 05/03/22 8

19 11 +/- 5 03/29/22 - 05/03/22 9

13 12 +/- 3 05/03/22 - 05/31 /22 10 26 15 +/- 11 05/03/22 05/31/22 9

25 15 +/- 10 05/03/22 - 05/31 /22 9

21 14 +/- 11 05/31/22 - 06/28/22 10 19 15 +/- 4 05/31/22 - 06/28/22 12 19 15 +/- 5 05/31 /22 - 06/28/22 12 20 15 +/- 7 06/28/22 - 08/02/22 11 21 14 +/- 6 06/28/22 - 08/02/22 7

22 15 +/- 8 06/28/22 - 08/02/22 12 19 16 +/- 7 08/02/22 - 08/30/22 9

26 17 +/- 9 08/02/22 - 08/30/22 10 46 21 +/- 22 08/02/22 - 08/30/22 13 27 19 +/- 14 08/30/22 - 10/04/22 11 30 19 +/- 12 08/30/22 10/04/22 11 27 19 +/- 10 08/30/22 - 10/04/22 14 32 21 +/- 13 10/04/22 - 11 /01 /22 16 35 25 +/- 13 10/04/22 11/01/22 14 39 24 +/- 15 10/04/22 - 11/01/22 13 38 26 +/- 22

(')

11 /01 /22 - 11 /29/22 11 46 28 +/- 24 11/01/22 11/29/22 15 44 28 +/- 20 11/01/22 - 11/29/22 17 38 27 +/- 18 I

11/29/22 - 12/27/22 20 35 27 +/- 9 11/29/22 - 12/27/22 21 36 27 +/- 9 11 /29/22 - 12/27 /22 25 31 27 +/- 6 00 12/28/21 - 12/27/22 6

46 20 +/- 16 12/28/21 - 12/27/22 7

46 20 +/- 16 12/28/21 - 12/27 /22 9

39 20 +/- 15

Table C-V.3 CONCENTRATIONS OF GAMMA EMITTERS IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF BYRON NUCLEAR GENERATING STATION, 2022 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 BY-01 12/28/21 - 03/29/22

<4

< 5

< 10

<4

< 7

< 6

< 8

< 3

< 156

< 90 03/29/22 - 06/28/22

< 3

< 6

< 13

< 4

< 8

< 5

< 11

< 4

<4

< 212

< 99 06/28/22 - 09/27122

< 3

< 4

< 10

< 4

< 5

< 3

< 6

< 2

< 151

< 48 09/27122 - 12/27 /22

< 3

< 4

< 15

< 3

< 9

< 6

< 9

< 3

< 245

< 110 MEAN BY-04 12/28/21 - 03/29/22

< 2

< 3

< 11

< 3

< 5

< 3

< 5

< 3

< 2

< 111

< 49 03/29/22 - 06/28/22

< 2

< 10

< 2

< 6

< 3

< 6

<2

< 2

< 155

< 57 06/28/22 - 09/27/22

< 3

< 4

< 16

< 4

< 8

< 5

< 9

< 3

< 235

< 99 09/27/22 - 12/27/22

< 2

<4

< 9

< 2

< 5

< 3

< 7

< 3

< 2

< 148

< 70 MEAN

(')

I t0 BY-06 12/28/21 - 03/29/22

< 2

< 3

< 11

< 3

< 5

< 3

< 5

< 2

< 136

< 13 03/29/22 - 06/28/22

< 2

< 3

< 8

< 2

< 6

< 3

< 6

< 2

< 149

< 67 06/28/22 - 09/27/22

< 3

< 4

< 12

< 3

<4

< 4

<6

< 2

< 163

< 57 09/27/22 - 12/27/22

< 2

< 3

< 7

< 3

< 5

< 4

< 7

<2

< 2

< 171

< 48 MEAN BY-08 12/28/21 - 03/29/22

< 3

< 9

< 3

< 5

< 7

< 3

< 116

< 50 03/29/22 - 06/28/22

< 2

< 3

< 7

< 2

<4

< 3

< 6

< 3

< 2

< 125

< 85 06/28/22 - 09/27122

< 4

< 15

< 4

< 10

< 6

< 8

< 3

< 256

< 105 09/27122 - 12/27 /22

< 1

< 3

< 7

< 2

< 3

< 5

< 2

< 186

< 58 MEAN

Table C-V.3 CONCENTRATIONS OF GAMMA EMITTERS IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF BYRON NUCLEAR GENERATING STATION, 2022 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 BY-21 12/28/21 - 03/29/22

< 2

< 8

< 2

< 6

< 3

<4

< 2

< 117

< 28 03/29/22 - 06/28/22

< 3

< 6

< 13

< 3

< 7

< 6

< 11

< 5

< 3

< 256

< 127 06/28/22 - 09/27 /22

< 2

< 4

< 8

< 3

< 7

< 3

<6

< 2

< 160

< 54 09/27 /22 - 12/27 /22

< 2

< 4

< 10

< 2

< 4

< 2

< 5

<2

< 2

< 139

< 58 MEAN BY-22 12/28/21 -

03/29/22

< 2

< 4

< 9

< 2

< 6

<3

< 5

< 2

< 106

< 53 03/29/22 - 06/28/22

< 4

< 5

< 16

< 4

< 9

< 5

< 9

< 3

< 269

< 108 06/28/22 - 09/27 /22

< 3

< 5

< 11

< 3

< 5

<4

<6

< 3

< 2

< 226

< 57 09/27 /22 - 12/27 /22

< 3

< 5

< 14

< 3

< 9

< 5

< 9

< 3

< 261

< 121 C)

MEAN I

~

0 BY-23 12/28/21 - 03/29/22

< 3

< 4

< 8

< 2

< 7

< 4

< 6

< 3

< 153

< 69 03/29/22 - 06/28/22

< 3

< 5

< 14

< 4

< 9

<4

< 9

< 3

< 223

< 106 06/28/22 - 09/27 /22

< 2

< 4

< 7

< 2

<4

< 6

< 2

< 134

< 78 09/27 /22 - 12/27 /22

< 3

< 4

< 13

< 3

< 8

<5

< 8

< 2

< 272

< 57 MEAN BY-24 12/28/21 - 03/29/22

< 2

< 3

< 7

< 2

< 7

< 4

< 6

< 2

< 113

< 73 03/29/22 - 06/28/22

< 2

< 4

< 7

< 3

< 6

< 3

< 7

< 2

< 143

< 52 06/28/22 - 09/27 /22

< 3

< 5

< 14

< 4

< 8

< 6

< 10

<4

< 3

< 227

< 108 09/27 /22 - 12/27 /22

< 2

< 3

< 9

< 1

< 6

< 4

< 8

< 2

< 155

< 61 MEAN

Table C-Vl.1 CONCENTRATIONS OF I-131 IN AIR IODINE SAMPLES COLLECTED IN THE VICINITY OF BYRON NUCLEAR GENERATING STATION, 2022 RESULTS IN UNITS OF E-3 PCI/CU METER+/- 2 SIGMA COLLECTION GROUP I GROUP II GROUP Ill PERIOD BY-21 BY-22 BY-23 BY-24 BY-01 BY-04 BY-06 BY-08 12/28/21 - 01 /04/22

< 62

< 57

< 58

< 62

< 63

< 68

< 63 01/04/22 - 01/11/22

< 68

< 67

< 50

< 21 01 /11 /22 - 01 /18/22

< 30

< 55

< 56

< 59

< 56 01/18/22 - 01/25/22

< 35

< 36

< 44

< 44 01/25/22 - 02/01/22

< 56

< 58

< 58 02/01 /22 - 02/08/22

< 32

< 36

< 36 02/08/22 - 02/15/22

< 30

< 42

< 30

< 20

< 29

< 14

< 29

< 29 02/15/22 - 02/22/22

< 38

< 33

< 41

< 37 (1)

< 37

< 31 02/22/22 - 03/01 /22

< 36

< 54

< 63

< 54

< 54 03/01 /22 - 03/08/22

< 52

< 49

< 48

< 50

< 52

< 51

< 54

< 53 03/08/22 - 03/15/22

< 28

< 34

< 33

< 33 03/15/22 - 03/22/22

< 22

< 49

< 50

< 49

< 48

< 48 03/22/22 - 03/29/22

< 33

< 14

< 29

< 28 03/29/22 - 04/05/22

< 40

< 39

< 40

< 39

< 45

< 44

< 45

< 47 04/05/22 - 04/12/22

< 66

< 67

< 66

< 57

< 56

< 62 04/12/22 - 04/19/22

< 29

< 14

< 28

< 31 04/19/22 - 04/26/22

< 52

< 54

< 43

< 44

< 43

< 43 04/26/22 - 05/03/22

< 56

< 57

< 56

< 58

< 66

< 33

< 65

< 65 05/03/22 - 05/10/22

< 23

< 56

< 55

< 65

< 64 05/10/22 - 05/17/22

< 50

< 51

< 48

< 49

< 49 05/17 /22 - 05/24/22

< 65

< 60

< 60 05/24/22 - 05/31 /22

< 37

< 35

< 55

< 55 05/31 /22 - 06/07 /22

< 25

< 52

< 59

< 59 06/07 /22 - 06/14/22

< 54

< 68

< 54

< 36 06/14/22 - 06/21/22

< 39

< 52

< 52 06/21/22 - 06/28/22

< 36

< 37

< 33

< 38

< 63

< 65

< 64

< 67 06/28/22 - 07 /05/22

< 56

< 38

< 56

< 54 07/05/22 - 07/12/22

< 50

< 49

< 50

< 62

< 61

< 61 07/12/22 - 07/19/22

< 29

< 30

< 37

< 42

< 41

< 40 07/19/22 - 07/26/22

< 44

< 45

< 63

< 25

< 64 07/26/22 - 08/02/22

< 61

< 62

< 63

< 66

< 65

< 62

< 68 08/02/22 - 08/09/22

< 36

< 37

< 42

< 44

< 42

< 44 08/09/22 - 08/16/22

< 64

< 66

< 64

< 54

< 62

< 59 08/16/22 - 08/23/22

< 38

< 39

< 38

< 48

< 39

< 40 08/23/22 - 08/30/22

< 63

< 50

< 48

< 22

< 66

< 65

< 67

< 65 08/30/22 - 09/06/22

< 54

< 55

< 57

< 52

< 51

< 50 09/06/22 - 09/13/22

< 52

< 21

< 54

< 61

< 59

< 59 09/13/22 - 09/20/22

< 27

< 28

< 27

< 28

< 62

< 66

< 65

< 64 09/20/22 - 09/27/22

< 40

< 41

< 42

< 48

< 47

< 48 09/27 /22 - 10/04/22

< 53

< 52

< 54

< 59

< 64

< 60

< 58 10/04/22 - 10/11/22

< 21

< 54

< 57

< 49

< 50

< 49

< 47 10/11 /22 - 10/19/22

< 55

< 50

< 57

< 60

< 51

< 55

< 53

< 53 10/19/22 - 10/25/22

< 41

< 52

< 20

< 42

< 62

< 59

< 58

< 59 10/25/22 - 11/01 /22

< 60

< 64

< 25

< 63

< 65

< 64

< 64 11/01/22 - 11/08/22

< 54

< 42

< 40

< 55

< 56

< 24

< 55 11/08/22 - 11/15/22

< 40

< 42

< 39

< 42

< 34

< 35

< 35 11/15/22 - 11/22/22

< 55

< 56

< 37

< 56

< 51

< 50

< 58 11 /22/22 - 11 /29/22

< 37

< 41

< 43

< 37

< 15

< 36

< 38 11 /29/22 - 12/06/22

< 56

< 54

< 59

< 57

< 29 12/06/22 - 12/13/22

< 33

< 32

< 33

< 34

< 41

< 40

< 43 12/13/22 - 12/20/22

< 24

< 25

< 26

< 27

< 24

< 25

< 24

< 13 12/20/22 - 12/27 /22

< 36

< 37

< 42

< 43

< 41

< 43 MEAN (1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANA T!ON C-11

Table C-Vll.1 CONCENTRATIONS OF I-131 IN MILK SAMPLES COLLECTED IN THE VICINITY OF BYRON NUCLEAR GENERATING STATION, 2022 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION CONTROL FARM INDICATOR FARM PERIOD BY-26-2 BY-20-1 01/04/22

< 0.9

< 0.8 02/01/22

< 0.8

< 0.8 03/01/22

< 0.8

< 0.9 04/05/22

< 0.9

< 0.8 05/03/22

< 0.8

< 0.9 05/17/22

< 0.9

< 0.9 05/31/22

< 0.8

< 0.7 06/14/22

< 0.9

< 0.9 06/28/22

< 0.8

< 0.9 07/12/22

< 0.9

< 0.9 07/26/22

< 1.0

< 0.9 08/09/22

< 0.9

< 0.9 08/23/22

< 0.9

< 0.9 09/06/22

< 0.8

< 0.9 09/20/22

< 0.8

< 0.9 10/04/22

< 0.7

< 0.8 10/19/22

< 0.9

< 0.9 11/01/22

< 0.9

< 0.9 12/06/22

< 0.8

< 0.8 MEAN (1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION C-12

Table C-Vll.2 CONCENTRATIONS OF GAMMA EMMITTERS IN MILK SAMPLES COLLECTED IN THE VICINITY OF BYRON NUCLEAR GENERATING STATION, 2022 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 BY-20-1 01/04/22

< 9

< 11

< 22

< 11

< 19

< 9

< 16

< 10

< 9

< 48

< 11 02/01/22

< 8

< 9

< 15

< 4

< 16

< 9

< 13

< 10

< 40

< 8 03/01/22

< 7

< 6

< 19

< 7

< 15

< 7

< 13

< 8

< 31

< 9 04/05/22

< 7

< 16

< 8

< 17

< 8

< 13

< 9

< 27

< 8 05/03/22

< 9

< 8

< 15

< 9

< 22

< 9

< 13

< 10

< 8

< 31

< 11 05/17/22

< 10

< 8

< 18

< 10

< 21

< 8

< 14

< 11

< 9

< 43

< 12 05/31/22

< 8

< 7

< 14

< 10

< 14

< 8

< 10

< 8

< 9

< 23

< 10 06/14/22

< 8

< 9

< 19

< 9

< 18

< 6

< 13

< 9

< 7

< 29

< 9 06/28/22

< 5

<6

< 13

< 7

< 16

< 6

< 10

< 7

<6

< 21

< 7 07/12/22

< 8

< 18

< 10

< 17

< 11

< 15

< 9

< 11

< 28

< 13 07/26/22

< 7

< 18

< 8

< 16

< 7

< 13

< 8

< 7

< 37

< 12 08/09/22

< 7

< 17

< 8

< 16

< 7

< 13

< 9

< 8

< 26

< 9 08/23/22

< 9

< 8

< 19

< 8

< 18

< 7

< 12

< 10

< 7

< 34

< 9 09/06/22

< 8

< 9

< 21

< 12

< 23

< 9

< 15

< 10

< 8

< 38

< 12 09/20/22

< 8

< 17

< 9

< 20

< 10

< 15

< 9

< 8

< 38

< 10 10/04/22

< 8

< 9

< 16

< 7

< 19

< 8

< 16

< 5

< 10

< 32

< 11

(')

10/19/22

< 7

< 6

< 13

< 8

< 22

< 9

< 13

< 9

< 6

< 30

< 6 I

11/01/22

< 6

< 5

< 16

< 7

< 14

< 8

< 11

< 8

< 7

< 27

< 5 C,I) 12/06/22

< 8

< 7

< 16

< 10

< 18

< 7

< 13

< 9

< 7

< 30

< 10 MEAN BY-26-2 01/04/22

< 7

< 10

< 15

< 9

< 19

< 8

< 15

< 10

< 50

< 12 02/01/22

< 7

< 8

< 20

< 9

< 18

< 9

< 16

< 11

< 8

< 34

< 10 03/01/22

< 5

< 7

< 13

< 7

< 11

< 6

< 12

< 7

< 30

< 10 04/05/22

< 10

< 11

< 18

< 8

< 20

< 10

< 16

< 10

< 42

< 13 05/03/22

< 6

< 9

< 20

< 7

< 20

< 8

< 13

< 9

< 8

< 37

< 8 05/17/22

< 8

< 7

< 18

< 8

< 17

< 8

< 13

< 8

< 33

< 10 05/31/22

< 9

< 11

< 5

< 24

< 8

< 16

< 10

< 37

< 10 06/14/22

< 8

< 7

< 16

< 11

< 16

< 9

< 13

< 7

< 8

< 34

< 7 06/28/22

< 6

< 7

< 13

< 6

< 18

< 5

< 12

< 8

< 6

< 25

< 6 07/12/22

< 7

< 8

< 14

< 5

< 19

< 7

< 11

< 9

< 35

< 11 07/26/22

< 8

< 6

< 17

< 9

< 16

< 7

< 11

< 6

< 7

< 34

< 10 08/09/22

< 8

< 17

< 8

< 19

< 6

< 14

< 8

< 29

< 10 08/23/22

< 6

< 7

< 14

< 8

< 20

< 8

< 12

< 8

< 21

< 10 09/06/22

< 7

< 6

< 19

< 8

< 18

< 7

< 13

< 8

< 39

< 10 09/20/22

< 8

< 10

< 18

< 9

< 20

< 8

< 15

< 8

< 31

< 12 10/04/22

< 8

< 6

< 17

< 9

< 20

< 9

< 12

< 9

< 7

< 31

< 9 10/19/22

< 6

<6

< 20

< 10

< 14

< 8

< 14

< 9

< 38

< 10 11/01/22

< 7

< 13

< 7

< 19

< 6

< 11

< 7

< 27

< 11 12/06/22

< 8

< 7

< 15

< 9

< 15

< 7

< 10

< 6

< 24

< 9 MEAN (1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION

Table C-Vlll.1 CONCENTRATIONS OF GAMMA EMITTERS IN VEGETATION SAMPLES COLLECTED IN THE VICINITY OF BYRON NUCLEAR GENERATING STATION, 2022 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 BY-CONTROL Broccoli 07/23/22

< 19

< 18

< 35

< 22

< 33

< 18

< 35

< 25

< 22

< 18

< 77

< 21 Potatoes/Carrots 07/23/22

< 34

< 30

< 69

< 32

< 80

< 25

< 74

< 44

< 37

< 38

< 144

< 18 MEAN BY-QUAD 1 Red/White Potatoes 07/23/22

< 20

< 18

< 42

< 20

< 48

< 19

< 35

< 21

< 24

< 23

< 71

< 23 Broccoli/Kale 07/23/22

< 41

< 37

< 89

< 47

< 95

< 34

< 58

< 43

< 42

< 37

< 145

< 42 MEAN BY-QUAD 2 n

Potatoes 08/06/22

< 22

< 21

< 46

< 21

< 39

< 20

< 37

< 25

< 24

< 22

< 81

< 29 I

~

Lettuce 08/06/22

< 37

< 33

< 40

< 46

< 77

< 35

< 56

< 34

< 36

< 38

< 113

< 32

.i::,.

MEAN BY-QUAD 3 Potatoes 07/23/22

< 25

< 26

< 61

< 26

< 55

< 26

< 49

< 35

< 34

< 31

< 112

< 33 Lettuce/Zucchini 07/23/22

< 20

< 21

< 42

< 19

< 40

< 20

< 37

< 24

< 21

< 20

< 71

< 31 MEAN BY-QUAD 4 Lettuce/Peppers 08/06/22

< 33

< 32

< 66

< 37

< 69

< 31

< 58

< 38

< 32

< 126

< 46 Squash/Zucchini 08/06/22

< 15

< 13

< 38

< 17

< 28

< 17

< 33

< 19

< 20

< 65

< 13 Red Beets 10/04/22

< 20

< 23

< 43

< 27

< 31

< 18

< 37

< 19

< 61

< 31 MEAN

Table C-IX.1 QUARTERLY OSLO RESULTS FOR BYRON NUCLEAR GENERATING STATION, 2022 RESULTS IN UNITS OF MREM/QUARTER +/- 2 STANDARD DEVIATIONS STATION MEAN CODE

+/-2 S.D.

JAN-MAR APR-JUN JUL-SEP OCT-DEC BY-01-1 21 +/- 3 19 21 20 22 BY-04-1 23 +/- 5 20 25 22 26 BY-06-1 20 +/- 5 18 21 17 23 BY-08-1 (Ctrl) 20 +/- 5 17 21 18 22 BY-21-1 18 +/- 3 17 19 16 20 BY-22-1 24 +/- 5 22 24 22 27 BY-23-1 23 +/- 6 20 24 23 27 BY-24-2 22 +/- 5 19 23 20 24 BY-101-1 18 +/- 4 17 18 16 21 BY-101-2 18 +/- 4 17 18 15 20 BY-102-1 24 +/- 6 23 26 21 27 BY-102-2 24 +/- 3 22 26 24 24 BY-103-1 23 +/- 5 21 25 22 26 BY-103-2 25 +/- 5 22 26 23 27 BY-103-3 23 +/- 6 22 24 20 27 BY-104-1 24 +/- 5 21 25 23 27 BY-104-2 25 +/- 5 23 26 23 28 BY-104-3 22 +/- 4 20 23 21 24 BY-105-1 24 +/- 5 21 27 24 25 BY-105-2 25 +/- 6 23 26 23 29 BY-106-1 23 +/- 5 22 26 21 25 BY-106-2 24 +/- 7 20 26 22 27 BY-107-1 26 +/- 3 25 28 25 27 BY-107-2 26 +/- 4 24 27 27 28 BY-107-3 22 +/- 4 20 23 20 24 BY-108-1 25 +/- 4 22 27 24 27 BY-108-2 23 +/- 4 21 25 22 24 BY-109-1 24 +/- 5 21 25 22 27 BY-109-2 22 +/- 3 21 23 21 24 BY-110-1 22 +/- 5 20 24 20 25 BY-110-2 22 +/- 3 20 24 21 23 BY-111-3 26 +/- 6 22 27 24 29 BY-111-4 23 +/- 4 22 26 22 24 BY-112-3 24 +/- 5 21 25 22 26 BY-112-4 23 +/- 5 21 25 22 26 BY-113-1 25 +/- 6 22 26 23 28 BY-113-2 21 +/- 4 20 21 19 23 BY-114-1 20 +/- 5 18 20 18 23 BY-114-2 23 +/- 2 22 24 22 22 BY-115-1 24 +/- 6 22 24 21 28 BY-115-2 23 +/- 5 20 23 22 26 BY-116-1 21 +/- 7 17 23 20 25 BY-116-2 21 +/- 3 20 23 20 23 BY-116-3 22 +/- 3 21 23 20 23 BY-201-3 24 +/- 5 21 25 22 26 BY-201-4 25 +/- 5 22 26 24 27 BY-202-1 24 +/- 6 23 26 21 27 BY-202-2 26 +/- 5 23 28 24 27 BY-203-1 19 +/- 5 18 20 17 23 BY-203-2 22 +/- 4 20 24 21 23 BY-204-1 21 +/- 5 20 23 19 24 C-15

Table C-IX.1 QUARTERLY OSLO RESULTS FOR BYRON NUCLEAR GENERATING STATION, 2022 RESULTS IN UNITS OF MREM/QUARTER +/- 2 STANDARD DEVIATIONS STATION MEAN CODE

+/-2 S.D.

JAN - MAR APR-JUN JUL-SEP OCT-DEC BY-204-2 25 +/- 5 21 26 (1) 26 BY-205-1 25 +/- 6 23 26 22 29 BY-205-2 23 +/- 4 21 24 21 25 BY-206-1 25 +/- 6 21 27 24 28 BY-206-2 26 +/- 6 22 28 26 29 BY-207-1 25 +/- 4 23 26 23 27 BY-207-2 24 +/- 5 21 24 22 26 BY-208-1 25 +/- 7 21 27 23 28 BY-208-2 25 +/- 6 23 26 23 28 BY-209-1 25 +/- 5 22 27 24 28 BY-209-4 25 +/- 5 23 27 23 27 BY-210-3 23 +/- 4 22 23 22 26 BY-210-4 23 +/- 6 19 25 22 26 BY-211-1 25 +/- 5 22 26 24 27 BY-211-4 24 +/- 3 22 26 24 25 BY-212-1 25 +/- 6 23 27 22 29 BY-212-4 26 +/- 5 23 28 25 28 BY-213-1 24 +/- 7 20 25 26 27 BY-213-4 26 +/- 5 23 27 24 28 BY-214-1 23 +/- 5 20 24 23 26 BY-214-4 24 +/- 7 21 27 21 26 BY-215-1 24 +/- 5 21 27 23 25 BY-215-4 25 +/- 7 23 26 23 30 BY-216-1 26 +/- 7 22 28 25 30 BY-216-2 24 +/- 7 21 26 22 29 BY-301-1 18 +/- 4 17 19 16 21 BY-301-2 20 +/- 4 19 21 18 23 BY-309-1 23 +/- 5 20 24 21 26 BY-309-2 23 +/- 4 21 25 21 25 BY-309-3 23 +/- 4 21 24 22 24 BY-309-4 21 +/- 4 18 22 20 24 BY-314-2 19 +/- 5 17 20 17 22 (1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION C-16

0 I

~

TABLE C-IX.2 COLLECTION PERIOD JAN-MAR APR-JUN JUL-SEP OCT-DEC TABLE C-IX.3 MEAN QUARTERLY OSLD RESULTS FOR THE INNER RING, OUTER RING, SPECIAL INTEREST, OTHER AND CONTROL LOCATIONS FOR BYRON NUCLEAR GENERA TING STATION, 2022 RESULTS IN UNITS OF MILLIREM/STD. QUARTER+/- 2 STANDARD DEVIATION INNER RING

+/-2 S.D.

21 +/- 4 24 +/- 5 21 +/- 5 25 +/- 5 OUTER RING SPECIAL INTEREST OTHER

+/-2 S.D.

21 +/- 3 19 +/- 4 19 +/- 3 26 +/- 4 22 +/- 5 22 +/- 4 22 +/- 4 19 +/- 5 20 +/- 5 27 +/- 4 23 +/- 4 24 +/- 5

SUMMARY

OF THE AMBIENT DOSIMETRY PROGRAM FOR BYRON NUCLEAR GENERATING STATION, 2022 CONTROL

+/-2 S.D.

17 +/- 0 21 +/- 0 18 +/- 0 22 +/- 0 RESULTS IN UNITS OF MILLIREM/STD. QUARTER+/- 2 STANDARD DEVIATION SAMPLES PERIOD PERIOD PERIOD MEAN LOCATION ANALYZED MINIMUM MAXIMUM

+/- 2 S.D.

INNER RING 144 15 29 23 +/- 6 OUTER RING 127 17 30 24 +/- 6 SPECIAL INTEREST 28 16 26 21 +/- 6 OTHER 28 16 27 21 +/- 6 CONTROL 4

17 22 20 +/- 5 INNER RING STATIONS-BY-101-1, BY-101-2, BY-102-1, BY-102-2, BY-103-1, BY-103-2, BY-103-3, BY-104-1, BY-104-2, BY-104-3, BY-105-1, BY-105-2, BY-106-1, BY-106-2, BY-107-1, BY-107-2, BY-107-3, BY-108-1, BY-108-2, BY-109-1, BY-109-2, BY-110-1, BY-110-2, BY-111-3, BY-111-4, BY-112-3, BY-112-4, BY-113-1, BY-113-2, BY-114-1, BY-114-2, BY-115-1, BY-115-2, BY-116-1, BY-116-2, BY-116-3 OUTER RING STATIONS-BY-201-3, BY-201-4, BY-202-1, BY-202-2, BY-203-1, BY-203-2, BY-204-1, BY-204-2, BY-205-1, BY-205-2, BY-206-1, BY-206-2, BY-207-1, BY-207-2, BY-208-1, BY-208-2, BY-209-1, BY-209-4, BY-210-3, BY-210-4, BY-211-1, BY-211-4, BY-212-1, BY-212-4, BY-213-1, BY-213-4, BY-214-1, BY-214-4, BY-215-1, BY-215-4, BY-216-1, BY-216-2 SPECIAL INTEREST STATIONS - BY-301-1, BY-301-2, BY-309-1*, BY-309-2*, BY-309-3*, BY-309-4*, BY-314-2 OTHER STATIONS - BY-01-1, BY-04-1, BY-06-1, BY-21-1, BY-22-1,BY-23-1, BY-24 CONTROL STATION - BY-08-1

For /SFSI Monitoring

! u C.

FIGURE C-3 Ground Water -Tritium - Station BY-14-1 Collected in the Vicinity of BNGS, 2000 - 2022 BY-14-1 3200 N. German Church Road Well 250 200 150 100 50 0

01-04-00 10-03-05 07-03-11 04-01-17 12-30-22 DUE TO VENDOR CHANGE IN 2005, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE 2005 AND MDC VALUES AFTER JUNE 2005 C-18

FIGURE C-4 Ground Water - Tritium - Station BY-18-1 Collected in the Vicinity of BNGS, 2010 - 2022 BY-18-1 Calhoun Well 250 200 150

..I i3 C.

100 50 0

07-01-10 08-15-13 09-29-16 11-14-19 12-29-22 C-19

! u C.

FIGURE C-5 Ground Water - Tritium - Station BY-32 Collected in the Vicinity of BNGS, 2000 - 2022 BY-32 Krueger Well 250 200 150 100 50 0

01-01-00 09-30-05 06-30-11 03-29-17 12-27-22 DUE TO VENDOR CHANGE IN 2005, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE 2005 AND MDC VALUES AFTER JUNE 2005 C-20

! u C.

FIGURE C-6 Ground Water - Tritium - Station BY-35 Collected in the Vicinity of BNGS, 2006 - 2022 BY-35 Vancko Well 250 200 150 100 50 0+----------------+--------

04-01-06 10-30-11 05-29-17 12-27-22 C-21

! u Q.

FIGURE C-7 Ground Water - Tritium - Station BY-37 Collected in the Vicinity of BNGS, 2006 - 2022 BY-37 Cavage Well 250 200 150 100 50 0

04-01-06 10-31-11 05-31-17 12-30-22 Ground Water - Tritium - Station BY-38 Collected in the Vicinity of BNGS, 2006 - 2022 BY-38 Steve Storz Well 250 200 150 100 50 0+------+-------,t-------+-------1 07-13-15 05-25-17 04-07-19 02-17-21 12-31-22 C-22

FIGURE C-8 Air Particulate - Gross Beta - Stations BY-08 (C) and BY-21 Collected in the Vicinity of BNGS, 2000 - 2022 BY-08 (C) Leaf River WNW 60.0 50.0 M

40.0

.§ 0 c.

30.0 M

0 w 0

20.0 10.0 0.0 -------+--------------------1 01-04-00 60.0 50.0 M

40.0

.§ 0 c.

30.0 M

0 w

~

20.0 10.0 10-03-05 07-03-11 04-01-17 12-30-22 BY-21 Byron Nearsite N 0.0 -------+------+----------------1 01-04-00 10-03-05 07-03-11 04-01-17 12-30-22 C-23

FIGURE C-9 Air Particulate - Gross Beta - Stations BY-22 and BY-23 Collected in the Vicinity of BNGS, 2000 - 2022 BY-22 Byron Nearsite SE 60.0 50.0 M

40.0

.§ u

c.

30.0 M

0 LU

~

20.0 10.0 0.0 +-------1-------------------1 01-04-00 10-03-05 07-03-11 04-01-17 12-30-22 BY-23 Byron Nearsite S 60.0 50.0 M

40.0

.§ u

c.

30.0 M

0 LU

~

20.0 10.0 0.0 +-------------------------1 01-04-00 10-03-05 07-03-11 04-01-17 12-30-22 C-24

FIGURE C-10 Air Particulate - Gross Beta - Station BY-24 Collected in the Vicinity of BNGS, 2000 - 2022 70.0 60.0 50.0

-E u 40.0 C.

~

30.0 0...

20.0 10.0 BY-24 Byron Nearsite SW 0.0 -------------+---------------

01-04-00 10-03-05 07-03-11 04-01-17 12-30-22 C-25

FIGURE C-11 Air Particulate - Gross Beta - Stations BY-01 and BY-04 Collected in the Vicinity of BNGS, 2005 - 2022 60.0 50.0 M

40.0

-E 0

c.

30.0 M

0 I.LI

~

20.0 10.0 BY-01 Byron N 0.0 +--------,1-------+------+-----+-------1 07-05-05 60.0 50.0 M

40.0

-E 0 c.

30.0 M

9

~

20.0 10.0 01-03-09 07-04-12 01-03-16 07-04-19 01-02-23 BY-04 Paynes Point SE 0.0 +--------,1-------+------+-----+-------1 07-05-05 01-03-09 07-04-12 01-03-16 07-04-19 01-02-23 Regular analysis of far field air particulate & gross beta did not take place prior to 2005 C-26

FIGURE C-12 Air Particulate - Gross Beta - Station BY-06 Collected in the Vicinity of BNGS, 2005 - 2022 60.0 50.0 40.0

-E u

a.

30.0 0 w

~

20.0 10.0 BY-06 Oregon SSW 0.0 +-------t------+--------ie---------------1 07-05-05 01-03-09 07-04-12 01-03-16 07-04-19 01-02-23 Regular analysis of far field air particulate & gross beta did not take place prior to 2005 C-27

Intentionally left blank

APPENDIX D INTER-LABORATORY COMPARISON PROGRAM

Intentionally left blank

Analytics Environmental Radioactivity Cross Check Program Table D.1 Teled~ne Brown En9ineerin9 Environmental Services Identification TBE Known Ratio of TBE to MonthNear Number Matrix Nuclide Units Reported Value (a)

Analytics Result Evaluation (bl Value March 2022 E13706 Milk Sr-89 pCi/L 80.3 96.8 0.83 A

Sr-90 pCi/L 12.7 12.6 1.01 A

E13707 Milk Ce-141 pCi/L 62.3 65 0.96 A

Co-58 pCi/L 158 164 0.96 A

Co-60 pCi/L 286 302 0.95 A

Cr-51 pCi/L 314 339 0.93 A

Cs-134 pCi/L 155 182 0.85 A

Cs-137 pCi/L 210 223 0.94 A

Fe-59 pCi/L 211 185 1.14 A

1-131 pCi/L 88.0 96.7 0.91 A

Mn-54 pCi/L 169 164 1.03 A

Zn-65 pCi/L 238 246 0.97 A

E13708 Charcoal 1-131 pCi 79.9 87.1 0.92 A

E13709 AP Ce-141 pCi 60.9 42.0 1.45 N(1l Co-58 pCi 118 107 1.11 A

Co-60 pCi 218 196 1.11 A

Cr-51 pCi 251 221 1.14 A

Cs-134 pCi 129 118 1.09 A

Cs-137 pCi 156 145.0 1.07 A

Fe-59 pCi 124 120.0 1.03 A

Mn-54 pCi 120 107 1.12 A

Zn-65 pCi 162 160 1.01 A

E13710 Soil Ce-141 pCi/g 0.123 0.103 1.19 A

Co-58 pCi/g 0.254 0.263 0.97 A

Co-60 pCi/g 0.493 0.483 1.02 A

Cr-51 pCi/g 0.603 0.543 1.11 A

Cs-134 pCi/g 0.268 0.292 0.92 A

Cs-137 pCi/g 0.399 0.431 0.93 A

Fe-59 pCi/g 0.320 0.296 1.08 A

Mn-54 pCi/g 0.263 0.263 1.00 A

Zn-65 pCi/g 0.407 0.395 1.03 A

E13711 AP Sr-89 pCi 83.2 97.4 0.85 A

Sr-90 pCi 12.7 12.7 1.00 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 (1) See NCR 22-04 (Page 1 of 2)

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

Analytics Result Evaluation (bl Value September 2022 E13712 Milk Sr-89 pCi/L 71.1 89.1 0.80 A

Sr-90 pCi/L 12.0 13.6 0.88 A

E13713 Milk Ce-141 pCi/L 148 161 0.92 A

Co-58 pCi/L 178 189 0.94 A

Co-60 pCi/L 229 260 0.88 A

Cr-51 pCi/L 486 456 1.07 A

Cs-134 pCi/L 220 252 0.87 A

Cs-137 pCi/L 203 222 0.92 A

Fe-59 pCi/L 174 173 1.01 A

1-131 pCi/L 75.9 94.2 0.81 A

Mn-54 pCi/L 269 282 0.95 A

Zn-65 pCi/L 364 373 0.97 A

E13714 Charcoal 1-131 pCi 81.4 83.6 0.97 A

E13715 AP Ce-141 pCi 102 91 1.12 A

Co-58 pCi 118 107 1.11 A

Co-60 pCi 207 147 1.41 N(2J Cr-51 pCi 310 257 1.21 w

Cs-134 pCi 148 142 1.04 A

Cs-137 pCi 137 125 1.10 A

Fe-59 pCi 115 98 1.18 A

Mn-54 pCi 168 159 1.05 A

Zn-65 pCi 240 211 1.14 A

E13716 Soil Ce-141 pCi/g 0.288 0.284 1.01 A

Co-58 pCi/g 0.320 0.334 0.96 A

Co-60 pCi/g 0.445 0.459 0.97 A

Cr-51 pCi/g 0.883 0.805 1.10 A

Cs-134 pCi/g 0.410 0.446 0.92 A

Cs-137 pCi/g 0.447 0.465 0.96 A

Fe-59 pCi/g 0.314 0.305 1.03 A

Mn-54 pCi/g 0.489 0.499 0.98 A

Zn-65 pCi/g 0.666 0.660 1.01 A

E13717 AP Sr-89 pCi 87.5 98.3 0.89 A

Sr-90 pCi 12.6 15.0 0.84 A

(a) The Analytics known value is equal to 100% of the parameter present in the standard as determined by gravimetric and/or volumetric measurements made during standard preparation (b) Analytics evaluation based on TBE internal QC limits:

A = Acceptable - reported result falls within ratio limits of 0. 80-1. 20 W = Acceptable with warning - reported result falls within 0. 70-0. 80 or 1. 20-1. 30 N = Not Acceptable - reported result falls outside the ratio limits of< 0. 70 and> 1.30 (2) See NCR 22-21 (Page 2 of 2)

DOE's Mixed Analyte Performance Evaluation Program (MAPEP)

Table D.2 Teledlne Brown Enaineerina Environmental Services Identification TSE Known Acceptance MonthNear Matrix Nuclide Units Reported Evaluation (b)

Number Value Value (a)

Range February 2022 22-GrF46 AP Gross Alpha Sq/sample 0.402 1.20 0.36 - 2.04 A

Gross Beta Sq/sample 0.669 0.68 0.341 - 1.022 A

22-MaS46 Soil Ni-63 Bq/kg 645 780 546-1014 A

Tc-99 Bq/kg 526 778 545 - 1011 N(3) 22-MaSU46 Urine Cs-134 Bq/L 1.67 1.77 1.24 - 2.30 A

Cs-137 Bq/L 1.50 1.56 1.09 - 2.03 A

Co-57 Bq/L 4.93 5.39 3.77 - 7.01 A

Co-60 Bq/L 2.13 2.06 1.44 - 2.68 A

Mn-54 Bq/L 4.83 5.08 3.56 - 6.60 A

U-234 Bq/L 0.142 0.0074 0.0052 - 0.0096 N<4l U-238 Bq/L 0.0254 0.0103 0.0072 - 0.0134 N(4)

Zn-65 Bq/L 4.71 4.48 3.14-5.82 A

22-MaW46 Water Ni-63 Bq/L 28.6 34.0 23.8 - 44.2 A

Tc-99 Bq/L 8.59 7.90 5.5 - 10.3 A

22-RdV46 Vegetation Cs-134 Sq/sample 6.61 7.61 5.33 - 9.89 A

Cs-137 Sq/sample 1.50 1.52 1.06 - 1.98 A

Co-57 Sq/sample 5.11 5.09 3.56 - 6.62 A

Co-60 Sq/sample 0.0162 (1)

A Mn-54 Sq/sample 2.42 2.59 1.81-3.37 A

Sr-90 Sq/sample 0.684 0.789 0.552 - 1.026 A

Zn-65 Sq/sample 1.44 1.47 1.03-1.91 A

August2022 22-MaS47 Soil Ni-63 Bq/kg 14.6 (1)

A Tc-99 Bq/kg 994 1000 700 - 1300 A

22-MaW47 Water Ni-63 Bq/L 24.4 32.9 23.0 - 42.8 A

Tc-99 Bq/L 1.9 (1)

N(S) 25-RdV47 Vegetation Cs-134 Sq/sample 0.032 (1)

A Cs-137 Sq/sample 0.891 1.08 0.758-1.408 A

Co-57 Sq/sample 0.006 (1)

A Co-60 Sq/sample 4.04 4.62 3.23 - 6.01 A

Mn-54 Sq/sample 2.01 2.43 1.70- 3.16 A

Sr-90 Sq/sample 1.25 1.60 1.12-2.08 w

Zn-65 Sq/sample 6.16 7.49 5.24 - 9.74 A

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

A = Acceptable - reporled result falls within ratio limits of 0. 80-1. 20 W= Acceptable with warning-reporled result falls within 0. 70-0.80 or 1.20-1.30 N = Not Acceptable - reporled result falls outside the ratio limits of< 0. 70 and> 1.30 (1) False positive test (2) Sensitivity evaluation (3) Tc-99 soil cross-checks done for TBE information only-not required (4) See NCR 22-05 (5) See NCR 22-22 (Page 1 of 1)

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

Limits March 2022 MRAD-36 Water Am-241 pCi/L 68.3 74.6 51.2 - 95.4 A

Fe-55 pCi/L 797 1140 670- 1660 A

Pu-238 pCi/L 146 147 88.4 - 190 A

Pu-239 pCi/L 69.9 71.9 44.5 - 88.6 A

Soil Sr-90 pCi/kg 8050 6720 2090 - 10500 A

AP Fe-55 pCi/filter 148 127 46.4 - 203 A

Pu-238 pCi/filter 29.9 29.6 22.3 - 36.4 A

Pu-239 pCi/filter 51.6 49.7 37.2 - 60.0 A

U-234 pCi/filter 59.9 67.3 49.9 - 78.9 A

U-238 pCi/filter 59.0 66.7 50.4 - 79.6 A

GR-A pCi/filter 95.6 94.2 49.2 - 155 A

GR-B pCi/filter 71.2 66.8 40.5 - 101 A

April 2022 RAD-129 Water Ba-133 pCi/L 61.7 62.9 52.3 - 69.2 A

Cs-134 pCi/L 80.9 81.6 68.8 - 89.8 A

Cs-137 pCi/L 37.4 36.6 32.1 - 43.3 A

Co-60 pCi/L 103 97.4 87.7 - 109 A

Zn-65 pCi/L 318 302 272 - 353 A

GR-A pCi/L 26.9 20.8 10.4 - 28.3 A

GR-B pCi/L 49.7 51.0 34.7 - 58.1 A

U-Nat pCi/L 56.3 68.9 56.3 - 75.8 A

H-3 pCi/L 17,000 18,100 15,800 - 19,000 A

Sr-89 pCi/L 65.3 67.9 55.3 - 76.1 A

Sr-90 pCi/L 42.1 42.7 31.5 - 49.0 A

1-131 pCi/L 25.7 26.2 21.8 - 30.9 A

September 2022 MRAD-37 Water Am-241 pCi/L 111 96.2 66.0- 123 A

Fe-55 pCi/L 850 926 544 - 1350 A

Pu-238 pCi/L 62.1 52.6 31.6 - 68.2 A

Pu-239 pCi/L 139.5 117 72.5 - 144 A

Soil Sr-90 pCi/kg 3350 6270 1950 - 9770 A

U-234 pCi/kg 1684 3350 1570 - 4390 A

U-238 pCi/kg 1658 3320 1820 - 4460 N12J AP Fe-55 pCi/filter 71.9 122 44.5-195 A

Pu-238 pCi/filter 38.8 29.9 22.6 - 36.7 N(1J Pu-239 pCi/filter 14.5 130 9.73 - 15.7 A

U-234 pCi/filter 78.0 71.5 53.0 - 83.8 A

U-238 pCi/filter 79.7 70.9 53.5 - 84.6 A

GR-A pCi/filter 62.8 55.5 29.0 - 91.4 A

GR-B pCi/filter 70.9 64.8 39.3 - 97.9 A

October 2022 RAD-131 Water Ba-133 pCi/L 76.2 79.4 66.6 - 87.3 A

Cs-134 pCi/L 28.0 30.5 23.9 - 33.6 A

Cs-137 pCi/L 202 212 191 - 235 A

Co-60 pCi/L 52.4 51.4 46.3 - 59.1 A

Zn-65 pCi/L 216 216 194 - 253 A

GR-A pCi/L 19.7 16.9 8.28 - 23.7 A

GR-B pCi/L 49.8 53.0 36.1 - 60.0 A

U-Nat pCi/L 10.54 8.53 6.60 - 9.88 Nl3J H-3 pCi/L 13,900 15,100 13,200 - 16,600 A

Sr-89 pCi/L 59.7 64.5 52.3 - 72.5 A

Sr-90 pCi/L 32.9 37.3 27.4 - 43.0 A

1-131 pCi/L 26.9 24.4 20.2 - 28.9 A

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

(b) ERA evaluation A = Acceptable - Reported value falls within the Acceptance Limits N = Not Acceptable - Reported value falls outside of the Acceptance Limits (1) See NCR 22-19 (2) U soil cross-checks done for TBE information only - not required (3) See NCR 22-20 (Page 1 of 1)

APPENDIX E EFFLUENT REPORT

Intentionally left blank

Table of Contents Summary.................................................................................................................................... 1 lntroduction................................................................................................................................. 2 1.0. Gaseous Effluents to the Atmosphere................................................................................. 3 2.0. Solids Radioactive Waste.................................................................................................... 3 3.0. Dose Limits to Members of the Public................................................................................. 3 4.0. Site Meteorology................................................................................................................. 4 APPENDIX E-1 Effluent and Waste Disposal Reports Table 1 Gaseous Effluents................................................................................................... E-1-1 Table 2 Liquid Effluents........................................................................................................ E-1-3 Table 3 Summary of Gaseous and Liquid Effluents Doses (10CFR50)................................ E-1-5 Table 4 Summary of Doses to Members of the Public (40CFR190 & 10CFR72.104)........... E-1-5 Table 5 Maximum Annual Calculated Cumulative Offsite Doses.......................................... E-1-6

Summary Calculations based on gaseous and liquid effluents and meteorological data indicate that public dose due to radioactive material attributable to Byron Station during the period does not exceed regulatory or Offsite Dose Calculation Manual (ODCM) limits.

The Total Effective Dose Equivalent (TEDE) due to licensed activities at Byron Station calculated for the maximum exposed individual for the period is 4.97E-01 mrem. The annual limit on TEDE is 100 mrem.

The assessment of radiation doses to the public is performed in accordance with the ODCM. The results of these analyses confirm that the station is operating in compliance with 10CFR50 Appendix I, 10CFR20 and 40CFR190.

There were no additional operational controls implemented which affected the areas of radiological effluents in 2022.

There were no measurements which exceeded the reporting levels, including any which would not have been attributable to station effluents.

The results of the current radiological environmental monitoring program are approximately the same as those found during the pre-operational studies conducted at Byron Station.

E-1

Introduction Liquid effluents from Byron Station are released to the Rock River in controlled batches after radioassay of each batch. Gaseous effluents are released to the atmosphere and are calculated on the basis of analyses of weekly grab samples and grab samples of batch releases prior to the release of noble gases as well as continuously collected composite samples of iodine and particulate radioactivity sampled during the course of the year. The results of effluent analyses are summarized on a monthly basis. Airborne concentrations of noble gases, 1-131, and particulate radioactivity in offsite areas are calculated using isotopic composition of effluents and meteorological data. Carbon-14 (C-14) concentration in offsite areas is calculated based on industry-approved methodology for estimation of the amount released and meteorological data.

Environmental monitoring is conducted by sampling at indicator and control (background) locations in the vicinity of Byron Station to measure changes in radiation or radioactivity levels that may be attributable to station operation. If significant changes attributable to Byron Station are measured, these changes are correlated with effluent releases. An environmental monitoring program is conducted which also includes all potential pathways at the site. Gaseous pathways include ground plane (direct),

inhalation, vegetation, meat, and milk. Liquid pathways include potable water and freshwater fish. The critical pathway for 2022 gaseous dose was vegetation. The critical pathway for 2022 liquid dose was freshwater fish.

E-2

1.0 Gaseous Effluents to the Atmosphere Measured concentrations and isotopic composition of noble gases radioiodine, tritium and particulate radioactivity released to the atmosphere during the year are listed in Table 1. The average quarterly release rate for all gaseous effluents were below detectable limits.

A total of 7.74E-01 curies of fission and activation gases were released.

A total of 8.63E+00 curies of other (C-14) radioisotopes were released.

A total of 1.32E+02 curies of tritium were released.

lodine-131 and gross alpha-emitting radionuclides were below detectable limits.

2.0 Solid Radioactive Waste Solid radioactive wastes were shipped by truck. For detail, refer to Byron Station 2022 Annual Radiological Effluent Release Report.

3.0 Dose Limits to Members of the Public Byron Station did not exceed any of the dose limits as shown below based on concurrent or historical meteorological data.

The limits on dose or dose commitment to a member of the public due to radioactive materials in liquid effluents from each reactor is 1.5 mrem to the whole body or 5 mrem to any organ during any calendar quarter and 3 mrem to the whole body or 10 mrem to any organ during a calendar year.

The limits on air dose in noble gases released in gaseous effluents to a member of the public from each reactor is 5 mrad for gamma radiation or 10 mrad for beta radiation during any calendar quarter and 10 mrad for gamma radiation or 20 mrad for beta radiation during a calendar year.

The limits on dose to a member of the public due to radioactive iodine &

particulate with half-lives greater than eight days in gaseous effluents released from each reactor is 7.5 mrem to any organ during any calendar quarter and 15 mrem during a calendar year.

The annual 1 0CFR20 limit on Total Effective Dose Equivalent to individual members of the public is 100 mrem.

The 40CFR 190 limits on individual members of the public is 25 mrem to the whole body, 25 mrem to any organ (except thyroid), and 75 mrem to the thyroid.

E-3

4.0 Site Meteorology Detailed records of the site meteorological measurements taken during each calendar quarter of the year are maintained by the meteorological vendor, retained on site, and are available upon request. The data are presented as cumulative joint frequency distributions of the wind direction for the 250' level and wind speed class by atmospheric stability class determined from the temperature difference between the 250' and 30' levels. Data recovery for all measurements on the meteorological tower was 99.8% during 2022.

E-4

Intentionally left blank

APPENDIX E-1 EFFLUENT AND WASTE DISPOSAL REPORT DATA TABLES

Intentionally left blank

Table 1 GASEOUS EFFLUENTS SUMMATION OF ALL RELEASES UNIT 1 REPORT FOR 2022 Units QTR 1 QTR2 QTR3 QTR4 YEAR Fission & Activation Gases

1. Total Release Ci 1.11E-01 1.84E-01 1.02E-01 8.24E-02 4.79E-01

2. Avg. Release Rate

µCi/sec 1.42E-02 2.34E-02 1.29E-02 1.04E-02 lodine-131 1. Total Release Ci (1)

(1)

2. Avg. Release Rate

µCi/sec (1)

(1)

Particulates Half Life>= 8 days

1. Total Release Ci (1)

(1)

2. Avg. Release Rate

µCi/sec (1)

(1)

Carbon-14

1. Total Release Ci 1.09E+00 1.11 E+00 1.12E+00 1.16E+00 4.47E+00

2. Avg. Release Rate

µCi/sec 1.40E-01 1.41 E-01 1.41 E-01 1.46E-01 Tritium

1. Total Release Ci 3.59E+00 4.94E+00 3.84E+00 5.86E+00 1.82E+01

2. Avg. Release Rate

µCi/sec 4.62E-01 6.28E-01 4.84E-01 7.37E-01 Gross Alpha Radioactivity

1. Total Release Ci (1)

(1)

2. Avg. Release Rate

µCi/sec (1)

(1)

(1) Less than minimum detectable activity which meets the lower limit of detection (LLD) requirements of TRM Section 3. 11 E-1-1

Table 1 (cont.)

GASEOUS EFFLUENTS SUMMATION OF ALL RELEASES UNIT2 REPORT FOR 2022 Units QTR 1 QTR2 QTR3 QTR4 YEAR Fission & Activation Gases

1. Total Release Ci 1.01 E-01 1.08E-01 4.52E-02 4.13E-02 2.95E-01

2. Avg. Release Rate

µCi/sec 1.29E-02 1.37E-02 5.69E-03 5.20E-03 lodine-131

1. Total Release Ci (1)

(1)

2. Avg. Release Rate

µCi/sec (1)

(1)

Particulates Half Life >= 8 days

1. Total Release Ci (1)

(1)

2. Avg. Release Rate

µCi/sec (1)

(1)

Carbon-14

1. Total Release Ci 1.12E+00 7.79E-01 1.16E+00 1.11 E+00 4.16E+00

2. Avg. Release Rate

µCi/sec 1.44E-01 9.90E-02 1.46E-01 1.39E-01 Tritium

1. Total Release Ci 3.22E+01 3.99E+01 1.42E+01 2.71E+01 1.14E+02

2. Avg. Release Rate

µCi/sec 4.14E+00 5.08E+00 1.79E+00 3.41E+00 Gross Alpha Radioactivity

1. Total Release Ci (1)

(1)

2. Avg. Release Rate

µCi/sec (1)

(1)

(1) Less than minimum detectable activity which meets the lower limit of detection (LLD) requirements of TRM Section 3. 11 E-1-2

Table 2 LIQUID EFFLUENTS SUMMATION OF ALL RELEASES UNIT 1 REPORT FOR 2022 Units QTR 1 QTR2 QTR3 QTR4 YEAR Fission and Activation Products

1. Total Release Ci 3.39E-03 8.S0E-03 1.44E-03 1.30E-03 1.46E-02

2. Avg. Diluted Cone.

µCi/ml 1.03E-09 2.46E-09 3.72E-10 3.39E-10 1.01 E-09 Tritium

1. Total Release Ci 4.40E+02 2.21E+02 6.54E+01 3.47E+02 1.07E+03

2. Avg. Diluted Cone.

µCi/ml 1.34E-04 6.40E-05 1.69E-05 9.02E-05 7.42E-05 Dissolved & Entrained Gases

1. Total Release Ci 9.26E-05 7.75E-06 (1) 9.88E-06 1.10E-04

2. Avg. Diluted Cone.

µCi/ml 2.82E-11 2.24E-12 N/A 2.57E-12 7.63E-12 Gross Alpha Radioactivity

1. Total Release Ci 9.26E-05 7.75E-05 (1) 9.88E-06 1.10E-04 Volume of liquid waste Liters 3.28E+09 3.45E+09 3.87E+09 3.85E+09 1.45E+10 Volume of dil. water Liters 6.56E+09 6.90E+09 7.74E+09 7.69E+09 2.89E+10 (1) Less than minimum detectable activity which meets the lower limit of detection (LLD) requirements of TRM Section 3.11 E-1-3

Table 2 (cont.)

LIQUID EFFLUENTS SUMMATION OF ALL RELEASES Unit 2 REPORT FOR 2022 Units QTR 1 QTR2 QTR 3 QTR4 YEAR Fission and Activation Products

1. Total Release Ci 3.39E-03 8.50E-03 1.44E-03 1.30E-03 1.46E-02

2. Avg. Diluted Cone.

µCi/ml 3.85E-06 7.83E-06 2.91 E-06 2.31 E-06 4.83E-06 Tritium

1. Total Release Ci 4.21E+02 2.03E+02 5.20E+01 3.27E+02 1.00E+03

2. Avg. Diluted Cone.

µCi/ml 4.77E-01 1.87E-01 1.05E-01 5.79E-01 3.31 E-01 Dissolved & Entrained Gases

1. Total Release Ci 9.26E-05 7.75E-06 (1) 9.88E-06 1.10E-04

2. Avg. Diluted Cone.

µCi/ml 1.05E-07 7.13E-09 NIA 1.75E-08 3.64E-08 Gross Alpha Radioactivity

1. Total Release Ci 9.26E-05 7.75E-06 (1) 9.88E-06 1.10E-04 Volume of liquid waste Liters 8.82E+05 1.09E+06 4.96E+05 5.65E+05 3.03E+06 Volume of dil. water Liters 0.00E+00 0.00E+00 0.00E+00 0.00E+00 2.89E+10 (1) Less than minimum detectable activity which meets the lower limit of detection (LLD) requirements of TRM Section 3. 11 E-1-4

Table 3 Summary of Gaseous and Liquid Effluents Doses to Members of the Public at the Highest Dose Receptors vs 10CFR50 Design Objectives Unit 1

% of Design Noble Gas Applicable Estimated Age

. Applicable Objective Limit Dose Dose Group Limit (per year, combined)

Maximum Location Gamma Air 1.77E-04 All 1.77E-03 10 Maximum Location Beta Air Dose 5.65E-05 All 3.83E-04 20 Maximum Location Total Body 1.68E-04 All 3.36E-03 5

Maximum Location Skin 2.39E-04 All 1.60E-03 15 Non-Noble Gas Maximum Bone 1.17E+00 Child 7.79E+00 15 Liquid Maximum Total Body 1.09E-02 Child 3.61 E-01 3

Maximum GI-Lli 1.12E-02 Child 1.12E-01 10 Unit 2

% of Design Noble Gas Applicable Estimated Age Applicable Objective Limit Dose Dose Group Limit (per year, combined)

Maximum Location Gamma Air 6.26E-05 All 6.26E-04 10 Maximum Location Beta Air Dose 2.59E-05 All 1.30E-04 20 Maximum Location Total Body 5.90E-05 All 1.18E-03 5

Maximum Location Skin 8.62E-05 All 5.75E-04 15

- ~-

Non-Noble Gas Maximum Bone 1.09E+00 Child 7.24E+00 15 Liquid Maximum Total Body 1.09E-02 Child 3.62E-01 3

Maximum GI-Lli 1.12E-02 Child 1.12E-01 10 Table 4 Summary of Doses to Members of the Public at the Highest Dose Receptors for 40CFR190 and 10CFR72.104 Compliance Highest Non-On-Site

% of Unit mrad mrad mrem mrem mrem mrem mrem Unit mrad mrad mrem mrem mrem mrem mrem Noble Dose Gas Noble Liquid Storage Total Applicable Limit Unit Receptors Gas Facilities Limit Total Body 2.27E-04 4.75E-01 2.17E-02 0.00E+00 4.97E-01 1.99E+00 25 mrem Organ Dose N/A 2.25E+00 2.25E-02 0.00E+00 2.28E+00 9.11 E+00 25 mrem E-1-5

Table 5 MAXIMUM ANNUAL CALCULATED CUMULATIVE OFFSITE DOSES Resulting from Airborne Releases Based on Concurrent Meteorological Data 2022 Unit 1:

Dose gamma air !1>

beta air !2>

whole body !3>

skin !4l organ !5> (child-bone)

Maximum Value 3.37 x10-5 mrad 1.37 x10-5 mrad 7.53 x10-2 mrem 3.65 x10-5 mrem

3. 70 x10-1 mrem Unit 1 Compliance Status 10 CFR 50 Appendix I gamma air beta air whole body skin organ Unit 2:

Dose gamma air !1>

beta air !2>

whole body !3>

skin !4) organ !5l (child-bone)

Yearly Objective 10.0 mrad 20.0 mrad 5.0 mrem 15.0 mrem 15.0 mrem Maximum Value 1.34 x10-5 mrad 1.08 x1Q-5 mrad 8.17 x10-2 mrem 158 x10-5 mrem 3.82 x10-1 mrem Unit 2 Compliance Status 10 CFR 50 Appendix I gamma air Yearly Objective beta air whole body skin organ 10.0 20.0 5.0 15.0 15.0 mrad mrad mrem mrem mrem 11l Gamma Air Dose - GASPAR II, NUREG-0597

<2l Beta Air Dose - GASPAR II, NUREG-0597

<3l Whole Body Dose - GASPAR 11, NUREG-0597

<4l Skin Dose - GASPAR II, NUREG-0597 l5l Inhalation and Food Pathways Dose - GASPAR II, NUREG-0597 Data recovery: 99.8%

E-1-6 Sector Affected North-Northwest North-Northwest North-Northwest North-Northwest North-Northwest

% of Appendix I 0.00 0.00 1.51 0.00 2.47 Sector Affected North-Northwest North-Northwest North-Northwest North-Northwest North-Northwest

% of Appendix I 0.00 0.00 1.63 0.00 2.55

APPENDIX F METEOROLOGICAL DATA

Intentionally left blank

Byron Generating Station Period of Record: January -

March 2022 Stability Class -

Extremely Unstable -

250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

0 0

2 1

0 0

3 NNE 1

0 0

0 1

NE 0

0 0

ENE 0

2 4

0 0

0 6

E 0

3 0

0 0

0 3

ESE 0

3 0

0 0

0 3

SE 0

1 0

0 0

0 1

SSE 0

1 1

0 0

0 2

s 0

1 0

0 0

0 1

SSW 0

0 0

SW 0

0 0

WSW 0

0 0

w 0

5 0

0 0

0 5

WNW 1

2 4

0 0

0 7

NW 0

1 2

0 0

0 3

NNW 0

1 5

0 0

0 6

Variable 0

0 0

Total 2

20 18 1

0 0

41 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

4

Byron Generating Station Period of Record: January -

March 2022 Stability Class - Moderately Unstable 250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

0 0

0 NNE 0

0 1

0 0

0 1

NE 0

0 1

0 0

0 1

ENE 0

0 0

E 0

0 0

ESE 0

0 0

SE 0

0 0

SSE 0

0 0

s 0

0 0

SSW 0

0 0

SW 0

0 0

WSW 0

0 0

w 0

0 0

WNW 0

1 1

0 0

0 2

NW 0

1 3

0 0

0 4

NNW 0

0 0

Variable 0

0 0

Total 0

2 6

0 0

0 8

Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

4

Byron Generating Station Period of Record: January -

March 2022 Stability Class - Slightly Unstable -

250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

0 0

1 0

0 0

1 NNE 0

0 1

0 0

0 1

NE 0

0 4

0 0

0 4

ENE 0

0 0

E 0

0 1

0 0

0 1

ESE 0

0 0

SE 0

0 0

SSE 0

0 0

s 0

0 1

0 0

0 1

SSW 0

0 0

SW 0

0 0

WSW 0

0 0

w 0

1 1

0 0

0 2

WNW 0

0 4

3 0

0 7

NW 0

0 2

4 0

0 6

NNW 0

0 0

Variable 0

0 0

Total 0

1 15 7

0 0

23 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

4

Byron Generating Station Period of Record: January -

March 2022 Stability Class -

Neutral -

250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

0 12 59 Bl 0

0 152 NNE 2

14 16 5

0 0

37 NE 2

6 26 20 6

0 60 ENE 1

6 13 3

1 0

24 E

1 5

10 0

0 0

16 ESE 1

5 7

19 5

0 37 SE 0

2 3

10 0

0 15 SSE 1

7 24 30 1

0 63 s

1 13 26 17 2

0 59 SSW 1

13 23 14 7

0 58 SW 2

10 43 17 4

0 76 WSW 2

13 19 11 3

0 48 w

4 25 54 39 15 9

146 WNW 2

26 63 52 22 0

165 NW 4

24 97 73 4

0 202 NNW 1

15 76 20 0

0 112 Variable 0

0 0

Total 25 196 559 411 70 9

1270 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

22 Hours of missing stability measurements in all stability classes:

4

Byron Generating Station Period of Record: January -

March 2022 Stability Class - Slightly Stable -

250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

3 13 13 0

0 0

29 NNE 0

12 6

1 0

0 19 NE 1

5 5

2 1

0 14 ENE 2

2 2

3 0

0 9

E 3

10 3

0 0

0 16 ESE 1

8 6

7 13 1

36 SE 0

7 17 11 1

0 36 SSE 1

13 18 24 3

0 59 s

2 11 17 19 4

0 53 SSW 8

21 15 8

9 0

61 SW 12 26 15 9

1 0

63 WSW 6

22 22 2

1 4

57 w

1 23 22 4

0 0

50 WNW 6

16 6

0 1

1 30 NW 11 17 4

1 0

0 33 NNW 2

14 5

0 0

0 21 Variable 0

0 0

Total 59 220 17 6 91 34 6

58 6 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

26 Hours of missing stability measurements in all stability classes:

4

Byron Generating Station Period of Record: January -

March 2022 Stability Class -

Moderately Stable -

250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

2 0

1 0

0 0

3 NNE 1

1 0

0 0

0 2

NE 0

1 0

0 0

0 1

ENE 4

1 0

0 0

0 5

E 1

3 0

0 0

0 4

ESE 1

2 0

0 0

4 SE 2

2 0

0 0

9 SSE 5

11

!3 2

0 0

31 s

4 10 0

2 0

0 16 SSW 5

3 0

0 0

0 8

SW 3

4 0

0 0

0 7

WSW 3

2 0

0 0

0 5

w 6

2 0

0 0

0 8

WNW 9

3 0

0 0

0 12 NW 6

2 0

0 0

0 8

NNW 2

1 0

0 0

0 3

Variable 0

0 0

Total 54 48 20 4

0 0

12 6 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

5 Hours of missing stability measurements in all stability classes:

4

Byron Generating Station Period of Record: January -

March 2022 Stability Class -

Extremely Stable -

250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

0 0

0 NNE 0

0 0

NE 1

0 0

0 1

ENE 0

0 0

E 0

1 0

0 0

0 1

ESE 1

1 2

0 0

0 4

SE 0

4 4

0 0

0 8

SSE 1

4 5

0 0

0 10 s

3 4

0 0

7 SSW 2

1 0

0 0

0 3

SW 1

0 0

0 1

WSW 3

0 0

0 3

w 2

0 0

0 2

WNW 5

0 0

0 5

NW 3

0 0

0 3

NNW 0

0 0

Variable 0

0 0

Total 22 15 11 0

0 0

48 Hours of calm in this stability class:

1 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

4

Byron Generating Station Period of Record: January -

March 2022 Stability Class -

Extremely Unstable -

250Ft-30Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

0 0

0 3

0 0

3 NNE 0

0 0

NE 0

0 0

ENE 0

0 0

1 0

0 1

E 0

1 3

2 0

0 6

ESE 1

2 1

0 0

0 4

SE 0

1 1

0 0

0 2

SSE 0

1 1

0 0

0 2

s 0

1 0

0 2

SSW 0

0 0

SW 0

0 0

WSW 0

0 0

w 1

4 0

0 0

0 5

WNW 0

1 6

1 0

0 8

NW 0

0 2

1 0

0 3

NNW 0

1 0

4 0

0 5

Variable 0

0 0

Total 2

12 14 13 0

0 41 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

4

Byron Generating Station Period of Record: January - March 2022 Stability Class -

Moderately Unstable -

250Ft-30Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

0 0

0 NNE 0

0 0

NE 0

0 0

1 1

0 2

ENE 0

0 0

E 0

0 0

ESE 0

0 0

SE 0

0 0

SSE 0

0 0

s 0

0 0

SSW 0

0 0

SW 0

0 0

WSW 0

0 0

w 0

0 0

WNW 0

0 1

1 0

0 2

NW 0

1 0

3 0

0 4

NNW 0

0 0

Variable 0

0 0

Total 0

1 1

5 1

0 8

Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

4

Byron Generating Station Period of Record: January -

March 2022 Stability Class - Slightly Unstable -

250Ft-30Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

0 0

0 1

0 0

1 NNE 0

0 0

1 0

0 1

NE 0

0 0

4 0

0 4

ENE 0

0 0

E 0

0 0

1 0

0 1

ESE 0

0 0

SE 0

0 0

SSE 0

0 0

s 0

0 1

0 0

0 1

SSW 0

0 0

SW 0

0 0

WSW 0

0 0

w 0

0 2

1 0

0 3

WNW 0

0 0

9 0

0 9

NW 0

0 0

3 0

0 3

NNW 0

0 0

Variable 0

0 0

Total 0

0 3

20 0

0 23 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

4

Byron Generating Station Period of Record: January -

March 2022 Stability Class - Neutral -

250Ft-30Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

1 7

17 63 53 1

142 NNE 1

9 17 11 10 1

49 NE 0

5 6

19 13 8

51 ENE 2

5 2

17 2

1 29 E

0 2

3 13 1

0 19 ESE 2

1 3

12 12 6

36 SE 0

1 0

3 7

1 12 SSE 1

2 5

15 20 4

47 s

1 0

27 26 18 2

74 SSW 0

7 18 24 15 13 77 SW 0

7 21 29 14 4

75 WSW 0

11 11 23 6

3 54 w

1 10 33 43 30 21 138 WNW 2

11 71 62 33 17 196 NW 1

13 64 81 26 2

187 NNW 1

11 38 51 5

0 106 Variable 0

0 0

Total 13 102 336 4 92 265 84 1292 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

4

Byron Generating Station Period of Record: January -

March 2022 Stability Class - Slightly Stable -

250Ft-30Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

1 3

4 6

0 0

14 NNE 2

4 4

15 0

0 25 NE 1

4 9

5 2

1 22 ENE 1

1 4

5 2

0 13 E

1 7

5 0

4 0

17 ESE 0

2 5

4 4

18 33 SE 0

0 4

8 8

10 30 SSE 0

0 2

16 11 16 45 s

0 4

4 14 23 16 61 SSW 0

2 7

23 17 15 64 SW 0

6 22 19 14 6

67 WSW 1

2 29 23 5

5 65 w

1 7

24 24 4

0 60 WNW 1

4 15 4

0 2

26 NW 0

3 19 24 1

0 47 NNW 1

4 15 3

0 0

23 Variable 0

0 0

Total 10 53 172 193 95 89 612 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

4

Byron Generating Station Period of Record: January -

March 2022 Stability Class - Moderately Stable -

250Ft-30Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

1 2

1 0

0 0

4 NNE 0

2 0

0 1

0 3

NE 0

5 2

0 0

0 7

ENE 2

2 0

1 0

0 5

E 2

2 1

0 0

0 5

ESE 0

1 2

1 0

0 4

SE 0

2 1

1 3

0 7

SSE 0

0 1

1 9

0 11 s

0 0

2 9

5 3

19 SSW 0

2 5

7 2

0 16 SW 1

2 2

3 0

0 8

WSW 0

1 7

0 0

0 8

w 0

1 8

1 0

0 10 WNW 0

4 8

3 0

0 15 NW 0

0 3

4 0

0 7

NNW 0

2 0

0 0

0 2

Variable 0

0 0

Total 6

28 43 31 20 3

131 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

4

Byron Generating Station Period of Record: January -

March 2022 Stability Class -

Extremely Stable -

250Ft-30Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

0 0

0 NNE 0

0 0

NE 0

1 0

0 0

0 1

ENE 1

0 0

0 1

E 2

0 0

0 2

ESE 0

1 0

0 2

SE 0

3 1

1 0

0 5

SSE 1

1 4

4 3

0 13 s

0 2

3 3

5 0

13 SSW 0

1 1

0 0

0 2

SW 1

0 1

0 0

0 2

WSW 0

0 2

0 0

0 2

w 0

1 0

0 0

0 1

WNW 0

0 0

3 0

0 3

NW 0

1 1

0 0

0 2

NNW 0

0 0

Variable 0

0 0

Total 5

11 13 12 8

0 49 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

4

Byron Generating Station Period of Record: April -

June 2022 Stability Class -

Extremely Unstable -

250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

0 0

1 0

0 0

1 NNE 0

0 2

0 0

0 2

NE 0

0 0

ENE 0

0 0

E 0

0 1

0 0

0 1

ESE 0

0 3

0 0

0 3

SE 0

0 0

SSE 0

0 0

1 0

0 1

s 0

3 4

2 0

0 9

SSW 0

3 2

1 0

0 6

SW 0

3 2

0 0

0 5

WSW 2

0 1

0 0

0 3

w 1

0 1

0 0

0 2

WNW 0

0 0

2 0

0 2

NW 0

0 0

NNW 0

1 1

0 0

0 2

Variable 0

0 0

Total 3

10 18 6

0 0

37 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

3

Byron Generating Station Period of Record: April -

June 2022 Stability Class - Moderately Unstable -

250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

0 0

1 0

0 0

1 NNE 0

0 0

3 0

0 3

NE 0

0 0

1 0

0 1

ENE 0

0 3

1 0

0 4

E 0

0 1

0 0

0 1

ESE 0

0 1

0 0

0 1

SE 0

0 0

SSE 0

0 0

1 0

0 1

s 0

1 0

l 0

0 2

SSW 0

0 0

SW 0

0 3

1 0

0 4

WSW 0

0 0

w 0

0 0

WNW 0

0 0

2 0

0 2

NW 0

0 4

1 0

0 5

NNW 0

1 0

0 0

0 1

Variable 0

0 0

Total 0

2 13 11 0

0 26 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

3

Byron Generating Station Period of Record: April -

June 2022 Stability Class - Slightly Unstable -

250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

1 1

2 0

0 0

4 NNE 0

0 0

2 0

0 2

NE 1

0 0

0 1

ENE 0

1 0

0 2

E 0

3 3

0 0

0 6

ESE 0

l 0

0 0

0 1

SE 0

0 0

1 1

SSE 0

0 0

s 0

1 1

0 0

0 2

SSW 0

4 5

2 0

0 11 SW 0

1 6

1 0

0 8

WSW 0

0 0

w 1

0 0

0 1

WNW 0

1 2

7 0

0 10 NW 0

1 10 1

0 0

12 NNW 0

0 1

0 0

0 1

Variable 0

0 0

Total 3

14 30 14 0

1 62 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

3

Byron Generating Station Period of Record: April -

June 2022 Stability Class -

Neutral -

250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

2 20 13 4

0 0

39 NNE 4

9 11 6

0 0

30 NE 2

7 6

2 0

0 17 ENE 1

13 15 4

0 0

33 E

0 40 53 2

0 0

95 ESE 3

6 11 14 2

0 36 SE 0

6 11 31 16 4

68 SSE 0

1 19 13 17 6

56 s

1 18 24 37 12 0

92 SSW 2

20 34 18 2

0 76 SW 1

16 25 13 1

0 56 WSW 4

18 12 34 9

7 84 w

3 15 26 27 5

0 76 WNW 1

13 41 46 3

0 104 NW 1

20 85 19 1

0 126 NNW 2

17 20 6

0 0

45 Variable 0

0 0

Total 27 239 406 276 68 17 1033 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

3

Byron Generating Station Period of Record: April -

June 2022 Stability Class - Slightly Stable -

250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

1 25 3

0 0

0 29 NNE 1

7 5

0 0

0 13 NE 2

9 12 1

0 0

24 ENE 1

12 16 6

0 0

35 E

3 40 23 5

0 0

71 ESE 4

14 25 8

5 0

56 SE 1

9 13 22 4

0 49 SSE 2

27 38 16 6

0 89 s

9 22 27 26 6

0 90 SSW 3

19 23 5

0 0

50 SW 3

12 23 4

0 0

42 WSW 5

15 18 4

1 0

43 w

4 13 16 4

4 2

43 WNW 6

21 17 0

0 0

44 NW 2

32 15 1

0 0

50 NNW 2

10 9

0 0

0 21 Variable 0

0 0

Total 49 287 283 102 26 2

7 4 9 Hours of calm in this stability class:

2 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

3

Byron Generating Station Period of Record: April -

June 2022 Stability Class - Moderately Stable - 250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

0 9

0 0

9 NNE 0

1 0

0 0

0 1

NE 6

1 2

0 0

0 9

ENE 1

2 2

0 0

0 5

E 2

9 1

0 0

0 12 ESE 1

8 7

0 0

0 16 SE 0

2 4

0 0

0 6

SSE 4

15 10 0

0 0

29 s

7 21 4

0 0

0 32 SSW 7

9 1

0 0

0 17 SW 6

6 0

0 0

0 12 WSW 1

3 0

0 0

0 4

w 6

3 0

0 0

0 9

WNW 6

3 0

0 0

0 9

NW 11 5

1 0

0 0

17 NNW 2

7 0

0 0

0 9

Variable 0

0 0

Total 60 104 32 0

0 0

196 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

3

Byron Generating Station Period of Record: April -

June 2022 Stability Class -

Extremely Stable -

250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

3 1

0 0

4 NNE 0

0 0

NE 0

0 0

ENE 1

1 0

0 0

0 2

E 0

3 0

0 0

0 3

ESE 1

0 6

0 0

0 7

SE 1

8 2

0 0

0 11 SSE 4

2 2

0 0

0 8

s 7

9 1

0 0

0 17 SSW 2

2 0

0 0

0 4

SW 3

0 0

0 3

WSW 1

0 0

0 1

w 3

0 0

0 3

WNW 4

1 0

0 0

0 5

NW 5

0 0

0 5

NNW 1

1 0

0 0

0 2

Variable 0

0 0

Total 36 28 11 0

0 0

75 Hours of calm in this stability class:

1 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

3

Byron Generating Station Period of Record: April -

June 2022 Stability Class - Extremely Unstable -

250Ft-30Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

0 0

0 NNE 0

0 0

3 0

0 3

NE 0

0 0

ENE 0

0 0

E 0

0 0

1 0

0 1

ESE 0

0 0

1 0

0 1

SE 0

0 0

2 0

0 2

SSE 0

0 0

0 1

s 0

0 1

2 2

0 5

SSW 0

4 1

3 1

0 9

SW 0

2 2

0 1

0 5

WSW 1

1 1

0 1

0 4

w 0

0 0

1 1

0 2

WNW 1

0 0

0 1

0 2

NW 0

0 0

NNW 0

0 1

1 0

0 2

Variable 0

0 0

Total 2

7 6

14 8

0 37 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

3

Byron Generating Station Period of Record: April -

June 2022 Stability Class - Moderately Unstable -

250Ft-30Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

0 0

0 NNE 0

0 0

1 3

0 4

NE 0

0 0

0 1

ENE 0

0 0

1 0

0 1

E 0

0 2

2 0

0 4

ESE 0

0 0

SE 0

0 0

1 0

0 1

SSE 0

0 0

1 1

s 0

0 0

1 1

0 2

SSW 0

0 0

SW 0

0 0

3 1

0 4

WSW 0

0 0

w 0

0 0

WNW 0

0 0

0 2

NW 0

0 1

3 1

0 5

NNW 0

0 1

0 0

0 1

Variable 0

0 0

Total 0

0 4

12 9

1 26 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

3

Byron Generating Station Period of Record: April -

June 2022 Stability Class -

Slightly Unstable -

250Ft-30Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

0 0

2 1

0 0

3 NNE 0

1 0

0 1

0 2

NE 1

0 0

0 1

0 2

ENE 0

0 2

0 1

0 3

E 0

0 5

0 0

0 5

ESE 0

0 1

0 0

0 l

SE 0

0 0

1 1

SSE 0

0 0

s 0

0 2

(',

,)

0 0

2 SSW 0

(J 6

1 2

0 9

SW 0

C) 5 4

1 0

10 WSW 0

0 0

w 0

0 l

0 0

0 1

WNW 0

l l

5 C J 0

12 NW 0

0 2

8 0

0 10 NNW 0

0 1

0 0

0 1

Variable 0

0 0

Total 1

2 28 19 11 1

62 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

3

Byron Generating Station Period of Record: April - June 2022 Stability Class - Neutral -

250Ft-30Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

2 16 11 6

1 0

36 NNE 2

7 5

13 5

0 32 NE 2

2 6

3 3

0 16 ENE 2

3 11 5

6 0

27 E

0 11 63 29 5

2 110 ESE 1

6 7

6 12 4

36 SE 1

3 1

12 16 28 61 SSE 2

1 8

11 9

24 55 s

1 7

24 22 26 12 92 SSW 1

9 23 29 12 2

76 SW 1

10 13 21 14 6

65 WSW 4

7 16 14 33 12 86 w

1 10 13 31 20 2

77 WNW 1

12 24 36 36 0

109 NW 0

8 49 50 6

0 113 NNW 0

7 20 15 0

0 42 Variable 0

0 0

Total 21 119 294 303 204 92 1033 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

3

Byron Generating Station Period of Record: April -

June 2022 Stability Class - Slightly Stable -

250Ft-30Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

2 3

7 5

0 0

17 NNE 0

0 5

23 0

0 28 NE 0

2 10 3

2 0

17 ENE 4

5 10 12 4

1 36 E

0 4

24 36 9

3 76 ESE 2

1 8

14 15 13 53 SE 0

2 5

10 10 19 46 SSE 0

4 5

14 33 12 68 s

0 1

13 34 24 18 90 SSW 0

10 14 27 17 1

69 SW 0

1 10 30 13 0

54 WSW 1

1 9

18 6

4 39 w

0 0

12 18 2

3 35 WNW 0

9 15 18 0

0 42 NW 1

3 22 29 1

0 56 NNW 1

2 13 9

0 0

25 Variable 0

0 0

Total 11 48 182 300 136 74 751 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

3

Byron Generating Station Period of Record: April -

June 2022 Stability Class - Moderately Stable -

250Ft-30Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

0 1

2 3

0 0

6 NNE 1

2 1

5 0

0 9

NE 0

2 3

2 0

0 7

ENE 0

2 1

2 0

0 5

E 0

3 3

2 2

0 10 ESE 0

1 2

4 6

1 14 SE 0

0 0

3 3

1 7

SSE 0

1 0

3 4

0 8

s 2

4 4

9 8

2 29 SSW 0

4 6

16 5

0 31 SW 0

1 7

6 0

0 14 WSW 0

3 4

2 0

0 9

w 0

4 3

4 0

0 11 WNW 0

0 1

3 0

0 4

NW 1

7 8

9 0

0 25 NNW 0

0 5

2 0

0 7

Variable 0

0 0

Total 4

35 50 75 28 4

196 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

3

Byron Generating Station Period of Record: April -

June 2022 Stability Class -

Extremely Stable -

250Ft-30Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

0 0

0 2

0 0

2 NNE 0

0 1

3 0

0 4

NE 0

1 1

1 0

0 3

ENE 1

4 0

1 0

0 6

E 1

2 2

0 0

0 5

ESE 0

1 0

0 0

0 1

SE 1

2 3

3 3

0 12 SSE 0

1 4

4 1

0 10 s

0 2

2 3

0 0

7 SSW 0

1 1

0 4

SW 0

1 4

4 0

0 9

WSW 1

0 2

1 0

0 4

w 0

0 0

WNW 0

0 0

3 0

0 3

NW 2

1 0

2 0

0 5

NNW 1

0 0

0 1

Variable 0

0 0

Total 7

16 20 28 5

0 76 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

3

Byron Generating Station Period of Record: July -

September 2022 Stability Class -

Extremely Unstable -

250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

0 1

5 0

0 0

6 NNE 1

2 0

0 0

0 3

NE 1

0 1

0 0

0 2

ENE 0

3 0

0 0

0 3

E 0

2 0

0 0

0 2

ESE 0

0 1

0 0

0 1

SE 0

2 0

0 0

0 2

SSE 0

3 1

0 0

0 4

s 0

4 4

0 0

0 8

SSW 0

4 3

0 0

0 7

SW 0

2 0

0 0

0 2

WSW 0

3 1

0 0

0 4

w 0

0 0

WNW 1

0 0

0 1

NW 0

0 4

0 0

0 4

NNW 0

0 1

0 0

0 1

Variable 0

0 0

Total 3

26 21 0

0 0

50 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

3

Byron Generating Station Period of Record: July -

September 2022 Stability Class - Moderately Unstable -

250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

0 1

2 1

0 0

4 NNE 0

0 0

NE 0

0 0

ENE 0

0 1

0 0

0 1

E 0

2 0

0 0

0 2

ESE 0

0 0

SE 0

0 0

SSE 0

0 1

0 0

0 1

s 0

0 2

0 0

0 2

SSW 0

1 1

0 0

0 2

SW 0

0 0

WSW 0

0 0

w 0

0 0

WNW 0

0 0

NW 0

0 0

3 0

0 3

NNW 0

0 4

0 0

0 4

Variable 0

0 0

Total 0

4 11 4

0 0

19 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

3

Byron Generating Station Period of Record: July -

September 2022 Stability Class - Slightly Unstable -

250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

0 2

4 0

0 0

6 NNE 1

3 0

0 0

0 4

NE 0

0 1

0 0

0 1

ENE 0

1 2

0 0

0 3

E 0

1 1

0 0

0 2

ESE 0

2 0

0 0

0 2

SE 0

2 0

0 0

0 2

SSE 0

2 3

1 0

0 6

s 0

1 9

2 0

0 12 SSW 0

1 10 0

0 0

11 SW 0

1 0

0 0

0 1

WSW 0

0 0

w 0

1 0

0 0

0 1

WNW 0

1 0

0 0

0 1

NW 0

0 0

2 0

0 2

NNW 0

0 2

1 0

0 3

Variable 0

0 0

Total 1

18 32 6

0 0

57 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

3

Byron Generating Station Period of Record: July -

September 2022 Stability Class - Neutral -

250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

10 35 36 0

0 0

81 NNE 7

42 12 0

0 0

61 NE 6

22 12 0

0 0

40 ENE 5

37 10 0

0 0

52 E

8 27 0

0 0

0 35 ESE 1

18 6

0 0

0 25 SE 1

12 13 1

0 0

27 SSE 3

35 23 1

0 0

62 s

2 43 46 7

0 0

98 SSW 2

29 34 0

0 0

65 SW 4

32 10 0

0 0

46 WSW 7

24 11 2

0 0

44 w

6 20 26 6

0 0

58 WNW 2

15 58 7

0 0

82 NW 3

45 36 8

0 0

92 NNW 6

28 20 2

0 0

56 Variable 0

0 0

Total 73 4 64 353 34 0

0 924 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

3

Byron Generating Station Period of Record: July -

September 2022 Stability Class - Slightly Stable -

250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

6 15 4

1 0

0 26 NNE 3

24 3

0 0

0 30 NE 7

12 5

0 0

0 24 ENE 6

14 0

0 0

0 20 E

5 22 0

0 0

0 27 ESE 6

12 2

0 0

0 20 SE 4

24 5

0 0

0 33 SSE 2

47 15 0

0 0

64 s

8 49 36 2

0 0

95 SSW 10 16 23 3

0 0

52 SW 8

13 13 0

0 0

34 WSW 10 7

6 2

0 0

25 w

7 24 10 0

0 0

41 WNW 12 31 16 0

0 0

59 NW 11 20 10 0

0 0

41 NNW 5

18 3

0 0

0 26 Variable 0

0 0

Total 110 348 151 8

0 0

617 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

3

Byron Generating Station Period of Record: July -

September 2022 Stability Class -

Moderately Stable -

250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

2 6

0 0

8 NNE 5

2 1

0 0

0 8

NE 1

2 0

0 0

0 3

ENE 7

10 0

0 0

0 17 E

5 26 0

0 0

0 31 ESE 4

13 0

0 0

0 17 SE 2

26 0

0 0

29 SSE 4

52 0

0 0

61 s

14 16 0

0 0

31 SSW 10 1

0 0

0 15 SW 18

()

1

()

0 19 WSW 8

4 0

0

()

12 w

17 11 0

0 0

0 28 WNW 16 8

0 0

24 NW 20 8

0 0

28 NNW 5

9 0

0 0

0 14 Variable 0

0

()

0

()

0 0

Total 138 197 10 0

0 0

345 Hours of calm in this stability class:

4 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

3

Byron Generating Station Period of Record: July -

September 2022 Stability Class -

Extremely Stable -

250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

1 0

0 0

1 NNE 1

0 0

0 1

NE 1

0 0

0 1

ENE 1

0 0

0 1

E 5

2 0

0 0

0 7

ESE 6

8 0

0 0

0 14 SE 2

7 3

0 0

0 12 SSE 12 16 0

0 0

0 28 s

9 2

0 0

11 SSW 11 0

0 0

11 SW 6

0 0

0 6

WSW 19 0

0 0

19 w

14 0

0 0

14 WNW 25 0

0 0

25 NW 17 1

0 0

18 NNW 5

0 0

0 5

Variable 0

0 0

Total 135 36 3

0 0

0 174 Hours of calm in this stability class:

15 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

3

Byron Generating Station Period of Record: July -

September 2022 Stability Class -

Extremely Unstable -

250Ft-30Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

0 0

4 1

0 0

5 NNE 0

0 1

1 0

0 2

NE 1

2 0

0 0

0 3

ENE 0

2 1

2 0

0 5

E 0

0 1

0 0

0 1

ESE 0

0 0

1 0

0 1

SE 0

0 1

0 0

0 1

SSE 0

3 0

0 0

4 s

0 0

2 4

1 0

7 SSW 0

1 5

3 0

0 9

SW 0

0 1

1 0

0 2

WSW 0

1 2

1 0

0 4

w 0

0 0

WNW 0

0 0

NW 0

1 0

4 0

0 5

NNW 0

0 0

1 0

0 1

Variable 0

0 0

Total 1

10 19 19 1

0 50 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

3

Byron Generating Station Period of Record: July -

September 2022 Stability Class - Moderately Unstable -

250Ft-30Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed ( in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

0 0

1 2

1 0

4 NNE 0

0 0

0 1

NE 0

0 0

ENE 0

0 1

0 0

0 1

E 0

0 2

0 0

0 2

ESE 0

0 0

SE 0

0 0

SSE 0

0 1

0 0

0 1

s 0

0 0

2 0

0 2

SSW 0

0 0

2 0

0 2

SW 0

0 0

WSW 0

0 0

w 0

0 0

WNW 0

0 0

NW 0

0 0

2 2

0 4

NNW 0

0 1

1 0

0 2

Variable 0

0 0

Total 0

0 6

9 4

0 19 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

3

Byron Generating Station Period of Record: July -

September 2022 Stability Class - Slightly Unstable -

250Ft-30Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

0 0

4 2

0 0

6 NNE 0

0 3

0 0

0 3

NE 0

0 1

1 0

0 2

ENE 0

0 0

2 0

0 2

E 1

1 1

1 0

0 4

ESE 0

3 0

0 0

0 3

SE 0

0 1

0 0

0 1

SSE 0

1 1

3 1

0 6

s 0

0 6

3 1

0 10 SSW 0

0 5

8 0

0 13 SW 0

0 1

0 0

0 1

WSW 0

0 1

0 0

0 1

w 0

0 0

WNW 0

1 0

0 0

0 1

NW 0

0 0

0 2

NNW 0

0 1

0 2

Variable 0

0 0

Total 1

6 25 20 5

0 57 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

3

Byron Generating Station Period of Record: July -

September 2022 Stability Class - Neutral -

250Ft-30Ft Delta-T (F)

Winds Measured at 250 Feet Wind Direction N

NNE NE ENE E

ESE SE SSE s

SSW SW WSW w

WNW NW NNW Variable Total 1-3 1

1 0

0 6

2 0

2 1

3 4

1 4

0 2

2 0

29 4-7 12 23 16 20 15 9

6 11 14 19 22 10 4

5 23 14 0

223 Wind Speed (in mph) 8-12 33 33 24 28 14 9

12 29 40 28 17 18 22 30 32 15 0

384 13-18 19 12 11 9

1 3

7 13 31 24 10 7

14 39 32 12 0

244 Hours of calm in this stability class:

0 19-24 0

1 0

0 0

0 2

3 8

2 0

3 7

8 6

3 0

43

> 24 0

0 0

0 1

0 0

1 Hours of missing wind measurements in this stability class:

0 Total 65 70 51 57 36 23 27 58 95 76 53 39 51 82 95 46 0

924 Hours of missing stability measurements in all stability classes:

3

Byron Generating Station Period of Record: July -

September 2022 Stability Class -

Slightly Stable -

250Ft-30Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

2 6

13 9

0 0

30 NNE 0

5 19 6

1 0

31 NE 1

7 13 18 0

0 39 ENE 2

10 6

2 0

0 20 E

0 5

16 8

1 0

30 ESE 1

5 2

6 2

0 16 SE 1

6 11 7

0 0

25 SSE 0

3 12 29 4

0 48 s

0 3

13 45 21 0

82 SSW 3

4 11 51 10 1

80 SW 3

1 16 14 12 0

46 WSW 0

1 7

8 3

3 22 w

2 3

11 14 4

0 34 WNW 0

5 18 31 0

0 54 NW 0

4 12 26 0

0 42 NNW 0

8 1

9 0

0 18 Variable 0

0 0

Total 15 76 181 283 58 4

617 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

3

Byron Generating Station Period of Record: July -

September 2022 Stability Class - Moderately Stable -

250Ft-30Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

1 2

5 5

0 0

13 NNE 3

2 4

3 0

0 12 NE 1

2 0

1 0

0 4

ENE 2

14 6

4 0

0 26 E

1 7

23 12 1

0 44 ESE 0

3 3

2 2

0 10 SE 0

1 8

8 5

0 22 SSE 0

0 4

14 5

0 23 s

2 0

2 30 15 0

49 SSW 0

5 5

13 3

0 26 SW 0

2 6

4 1

0 13 WSW 0

0 7

5 0

0 12 w

0 2

9 7

0 0

18 WNW 2

2 11 12 0

0 27 NW 0

2 15 21 0

0 38 NNW 0

2 8

2 0

0 12 Variable 0

0 0

Total 12 46 116 143 32 0

349 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

3

Byron Generating Station Period of Record: July -

September 2022 Stability Class -

Extremely Stable -

250Ft-30Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

1 3

3 1

0 0

8 NNE 0

3 2

1 0

0 6

NE 1

2 0

0 0

0 3

ENE 1

4 0

0 0

0 5

E 1

0 2

1 0

0 4

ESE 0

1 7

3 3

0 14 SE 1

0 5

12 2

0 20 SSE 0

1 3

2 0

7 s

0 3

1 7

4 0

15 J_

SSW 1

1 8

I 1

0 18 S'01J 2

3 3

l 0

0 9

WSW l

4 5

l 0

0 11 w

2 12 0

l 0

0 15 WNW 0

12 9

2 0

0 23 NW l

5 4

2 0

0 12 NNW l

3 11 0

0 0

15 Variable 0

0 0

Total 13 57 61 42 12 0

185 Hours of calm in this stability class:

4 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

3

Byron Generating Station Period of Record: October -

December2022 Stability Class -

Extremely Unstable -

250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

0 0

0 NNE 0

0 0

NE 1

0 0

0 1

ENE 0

0 1

0 0

0 1

E 0

0 0

ESE 0

0 0

SE 0

0 0

SSE 0

0 0

s 0

0 0

SSW 0

0 0

SW 0

0 0

WSW 0

0 0

1 0

0 1

w 0

1 2

1 0

0 4

WNW 0

0 0

NW 0

0 0

NNW 0

0 0

Variable 0

0 0

Total 1

1 3

2 0

0 7

Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

0

Byron Generating Station Period of Record: October -

December2022 Stability Class - Moderately Unstable -

250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

0 0

3 0

0 0

3 NNE 0

0 0

NE 0

1 1

0 0

0 2

ENE 0

1 0

0 0

0 1

E 0

0 0

ESE 0

0 0

SE 0

0 0

SSE 0

0 0

s 0

0 0

SSW 0

0 0

SW 0

0 2

0 0

0 2

WSW 0

0 0

w 0

1 1

0 0

0 2

WNW 0

0 0

NW 0

0 0

NNW 0

0 0

Variable 0

0 0

Total 0

3 7

0 0

0 10 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

0

Byron Generating Station Period of Record: October -

December2022 Stability Class - Slightly Unstable -

250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

0 0

1 0

0 0

1 NNE 0

0 3

0 0

0 3

NE 1

1 0

0 0

0 2

ENE 0

0 0

E 0

1 0

0 0

0 1

ESE 0

2 0

0 0

0 2

SE 0

0 0

1 0

0 1

SSE 0

0 0

2 0

0 2

s 0

0 0

1 0

0 1

SSW 0

0 0

SW 0

1 0

0 0

0 1

WSW 0

0 0

1 0

0 1

w 0

0 1

1 0

0 2

WNW 0

1 1

1 0

0 3

NW 0

1 1

0 0

0 2

NNW 0

0 1

0 0

0 1

Variable 0

0 0

Total 1

7 8

7 0

0 23 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

0

Byron Generating Station Period of Record: October -

Decernber2022 Stability Class -

Neutral -

250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

1 14 11 1

0 0

27 NNE 0

8 1

1 0

0 10 NE 2

8 1

0 0

0 11 ENE 2

11 5

0 0

0 18 E

4 23 16 0

0 0

43 ESE 4

15 8

12 1

0 40 SE 3

21 11 5

0 0

40 SSE 2

9 JU 25 8

0 62 s

3 6

3;;

29 2

0 72 SSW 1

12 21 23 6

0 63 SW 4

20 35 9

0 0

68 WSW 5

11 36 51 2

0 105 w

1 n

47 77 20 2

164 WNW 0

16 52 62 29 0

159 NW 7

23 44 39 0

0 113 NNW 1

11 27 2

0 0

41 Variable 0

0 0

Total 40 225 3 65 336 68 2

1036 Hours of calm in this stabil class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

0

Byron Generating Station Period of Record: October -

Decernber2022 Stability Class - Slightly Stable -

250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

7 20 8

0 0

0 35 NNE 4

8 3

0 0

0 15 NE 4

13 2

0 0

0 19 ENE 5

11 11 0

0 0

27 E

5 26 9

10 0

0 50 ESE 6

11 17 9

8 0

51 SE 1

8 10 1

0 0

20 SSE 3

10 51 34 3

0 101 s

3 12 30 59 2

0 106 SSW 3

19 21 15 0

0 58 SW 5

34 11 10 0

0 60 WSW 2

20 12 5

1 0

40 w

3 27 25 6

3 0

64 WNW 3

11 11 0

2 0

27 NW 5

7 29 2

0 0

43 NNW 5

12 4

1 0

0 22 Variable 0

0 0

Total 64 249 254 152 19 0

738 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

0

Byron Generating Station Period of Record: October -

December2022 Stability Class - Moderately Stable -

250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

4 1

0 0

5 NNE 1

4 0

0 0

0 5

NE 2

5 0

0 0

0 7

ENE 2

4 1

0 0

0 7

E 6

20 1

0 0

0 27 ESE 1

14 3

0 0

0 18 SE 2

5 1

0 0

0 8

SSE 3

11 45 4

0 0

63 s

2 12 3

0 0

0 17 SSW 6

10 0

0 0

0 16 SW 8

7 0

0 0

0 15 WSW 5

6 1

0 0

0 12 w

6 5

2 0

0 0

13 WNW 8

2 1

0 0

0 11 NW 6

0 0

0 6

NNW 1

2 0

0 0

0 3

Variable 0

0 0

Total 63 108 58 4

0 0

233 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

0

Byron Generating Station Period of Record: October - December2022 Stability Class -

Extremely Stable -

250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

2 0

0 0

2 NNE 1

0 0

0 1

NE 1

0 0

0 1

ENE 4

1 0

0 0

0 5

E 3

6 0

0 0

0 9

ESE 4

9 3

0 0

0 16 SE 3

10 1

0 0

0 14 SSE 5

9 12 0

0 0

26 s

14 16 0

0 0

0 30 SSW 11 4

0 0

15 SW 9

0 0

0 9

WSW 4

0 0

0 4

w 9

0 0

0 9

WNW 7

0 0

0 7

NW 5

1 0

0 0

0 6

NNW 4

1 0

0 0

0 5

Variable 0

0 0

Total 86 57 16 0

0 0

159 Hours of calm in this stability class:

2 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

0

Byron Generating Station Period of Record: October -

December2022 Stability Class - Extremely Unstable - 250Ft-30Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

0 0

0 NNE 0

0 0

NE 0

0 0

ENE 1

0 1

0 0

0 2

E 0

0 0

ESE 0

0 0

SE 0

0 0

SSE 0

0 0

s 0

0 0

SSW 0

0 0

SW 0

0 0

WSW 0

0 0

0 1

w 0

0 1

3 0

0 4

WNW 0

0 0

NW 0

0 0

NNW 0

0 0

Variable 0

0 0

Total 1

0 2

3 1

0 7

Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

0

Byron Generating Station Period of Record: October -

December2022 Stability Class - Moderately Unstable -

250Ft-30Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

0 0

3 0

0 0

3 NNE 0

0 0

NE 0

0 0

ENE 0

0 3

0 0

0 3

E 0

0 0

ESE 0

0 0

SE 0

0 0

SSE 0

0 0

s 0

0 0

SSW 0

0 0

SW 0

0 2

0 0

0 2

WSW 0

0 0

w 0

0 1

1 0

0 2

WNW 0

0 0

NW 0

0 0

NNW 0

0 0

Variable 0

0 0

Total 0

0 9

1 0

0 10 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

0

Byron Generating Station Period of Record: October -

December2022 Stability Class - Slightly Unstable -

250Ft-30Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

0 0

0 NNE 0

0 4

0 0

0 4

NE 1

0 1

0 0

0 2

ENE 0

0 0

E 0

0 1

0 0

0 1

ESE 0

0 2

0 0

0 2

SE 0

0 0

1 1

SSE 0

0 0

2 2

s 0

0 0

0 1

SSW 0

0 0

SW 0

1 0

0 0

0 1

WSW 0

0 0

0 1

w 0

0 0

1 1

0 2

WNW 0

2 0

1 1

0 4

NW 0

0 1

0 0

0 1

NNW 0

0 1

0 0

0 1

Variable 0

0 0

Total 1

3 10 2

4 3

23 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

0

Byron Generating Station Period of Record: October -

December2022 Stability Class - Neutral -

250Ft-30Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

2 6

7 10 0

1 26 NNE 0

6 4

1 1

0 12 NE 0

5 5

0 0

0 10 ENE 1

10 3

2 0

0 16 E

1 10 19 16 1

0 47 ESE 3

8 10 12 7

2 42 SE 3

9 18 1

6 1

38 SSE 1

5 15 10 17 12 60 s

0 3

13 31 20 7

74 SSW 0

7 8

22 19 7

63 SW 2

11 15 30 8

1 67 WSW 1

14 22 33 37 0

107 w

0 3

29 49 55 29 165 WNW 0

6 35 31 46 30 148 NW 2

6 40 34 31 2

115 NNW 0

10 19 14 3

0 46 Variable 0

0 0

Total 16 119 262 296 251 92 1036 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

0

Byron Generating Station Period of Record: October -

December2022 Stability Class - Slightly Stable -

250Ft-30Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

0 6

11 11 0

0 28 NNE 0

5 8

6 1

0 20 NE 1

8 12 4

0 0

25 ENE 1

5 10 3

5 0

24 E

1 5

12 17 9

6 50 ESE 1

9 5

13 14 11 53 SE 0

2 4

8 1

1 16 SSE 1

3 6

12 36 14 72 s

0 1

4 19 70 26 120 SSW 0

3 9

28 24 8

72 SW 0

1 9

23 17 3

53 WSW 0

2 16 25 5

2 50 w

0 2

17 38 5

3 65 WNW 0

2 7

13 2

2 26 NW 1

3 7

27 5

0 43 NNW 1

4 6

10 0

0 21 Variable 0

0 0

Total 7

61 143 257 194 76 738 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

0

Byron Generating Station Period of Record: October -

December2022 Stability Class - Moderately Stable -

250Ft-30Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

1 3

1 1

0 0

6 NNE 0

0 0

NE 0

3 5

1 0

0 9

ENE 0

0 6

6 0

0 12 E

0 3

5 3

2 0

13 ESE 0

3 7

12 2

1 25 SE 1

2 4

1 3

0 11 SSE 0

1 7

3 2

0 13 s

1 0

2 11 40 5

59 SSW 0

0 4

2 2

0 8

SW 0

0 4

16 1

0 21 WSW 0

3 3

10 0

0 16 w

0 2

3 6

0 0

11 WNW 0

2 6

6 0

0 14 NW 0

2 3

2 0

0 7

NNW 1

4 2

1 0

0 8

Variable 0

0 0

Total 4

28 62 81 52 6

233 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

0

Byron Generating Station Period of Record: October -

December2022 Stability Class -

Extremely Stable -

250Ft-30Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed ( in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

3 1

0 0

4 NNE 0

0 0

NE 1

2 4

0 0

0 7

ENE 2

3 2

0 0

0 7

E 0

0 0

2 0

0 2

ESE 0

0 3

4 2

0 9

SE 0

1 9

13 3

0 26 SSE 0

1 2

6 3

0 12 s

0 0

4 8

10 0

22 SSW 0

0 6

13 4

0 23 SW 0

7 8

8 0

0 23 WSW 1

2 6

1 0

0 10 w

1 0

4 3

0 0

8 WNW 0

1 1

1 0

0 3

NW 1

0 2

0 0

0 3

NNW 1

0 1

0 0

0 2

Variable 0

0 0

Total 10 18 52 59 22 0

161 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

0

APPENDIX G ERRATA DATA

Intentionally left blank

In the 2021 ARERR there was a statement missing in the miscellaneous information section that should have stated:

"On 2/12/21 the Circwater Slowdown compositor line was frozen, and no sample was collected for 24 hrs. Compensatory sampling started with 1x per every 8 hrs from the alternate sample point of OPR 1 OJ until line was dethawed later on that day and continuous flow was restored."

There was no other errata data for 2022.

G-1

Intentionally left blank

APPENDIX H ANNUAL RADIOLOGICAL GROUNDWATER PROTECTION PROGRAM REPORT (ARGPPR)

Intentionally left blank

NRG.Docket No: 50-454 50-455 BYRON NUCLEAR GENERATING STATION UNITS 1 and 2 Annual Radiological Groundwater Protection Program Report 1 January Through 31 December 2022 Prepared By Teledyne Brown Engineering Environmental Services l

I Byron Nuclear Generating Station Byron, IL 61010 April 2023

Intentionally left blank

Table Of Contents I. Summary and Conclusions.............................................................................................. 1 II. Introduction...................................................................................................................... 3 A. Objectives of the RGPP....................................................................................... 3 B. Implementation of the Objectives........................................................................ 3 C. Program Description............................................................................................ 4 D. Characteristics of Tritium (H-3)............................................................................ 4 Ill. Program Description....................................................................................................... 6 A. Sample Analysis.................................................................................................. 6 B. Data Interpretation............................................................................................... 6 C. Background Analysis........................................................................................... 7

1. Background Concentrations of Tritium...................................................... 7 IV. Results and discussion.................................................................................................. 9 A. Groundwater Results........................................................................................... 9 B. Drinking Water Well Survey................................................................................. 9 C. Summary of Results - Inter-laboratory Comparison Program.......................... 10 D. Leaks, Spills, and Releases.............................................................................. 1 O E. Trends................................................................................................................ 10 F. Investigations..................................................................................................... 10 G. Actions Taken.................................................................................................... 10

-i-

Appendix A Tables Table A-1 Figures Figure A-1 Appendix B Tables Table B-1.1 Table B-1.2 Table B-1.3 Appendices Location Designation Radiological Groundwater Protection Program - Sampling Locations, Distance and Direction, Byron Nuclear Generating Station, 2022 Monitoring Well Locations, Byron Nuclear Generating Station, 2022 (Extra wells noted on map are for reference only.)

Data Tables Concentrations of Tritium, Strontium and Gross Alpha in Groundwater Samples Collected in the Vicinity of Byron Nuclear Generating Station, 2022 Concentrations of Gamma Emitters in Groundwater Samples Collected in the Vicinity of Byron Nuclear Generating Station, 2022 Concentrations of Hard-To-Detects in Groundwater Samples Collected in the Vicinity of Byron Nuclear Generating Station, 2022

-ii-

I.

Summary and Conclusions In 2006, Exelon instituted a comprehensive monitoring program to evaluate the impact of station operations on groundwater in the vicinity of Byron Nuclear Generating Station. The monitoring was conducted in two phases. Phase 1 of the monitoring was part of a comprehensive study initiated by Exelon to determine whether groundwater or surface water at and in the vicinity of Byron Nuclear Generating Station had been adversely impacted by any releases of radionuclides. Phase 1 was conducted by Conestoga Rovers and Associates (CRA) and the conclusions were made available to state and federal regulators as well as the public.

Phase 2 of the RGPP was conducted by Exelon corporate and station personnel to initiate follow up of Phase 1 and begin long-term monitoring at groundwater locations selected during Phase 1. This is the fifteenth in a series of annual reports on the status of the Radiological Groundwater Protection Program (RGPP) conducted at Byron Nuclear Generating Station. This report covers groundwater and surface water samples collected from the environment both on and off station property in 2022. During that time period, 134 analyses were performed on 46 samples from 14 locations.

In 2022, thirteen (13) Radiological Groundwater Protection Program (RGPP) monitoring wells were sampled in total. Groundwater samples were obtained in March, June, August and November and analyzed for tritium.

Three wells contained levels of tritium above the lower limit of detection (LLD) of 200 pCi/L. They were AR-4 (200 pCi/L in March, 237 pCi/L in August, 327 pCi/L in November), AR-7 (211 pCi/L in October) and AR-11 (590 pCi/L in June, 567 pCi/L in November). Well AR-11 is near the Circulating Water Slowdown piping, where historical leakage through vacuum breakers was known to have occurred.

Tritium in Well AR-7, located on-site just west of plant structures, has been measured in this well slightly above detection limits on an intermittent basis since the well was first drilled in 2006. The tritium present in this well is likely due to legacy tritium prior to 2006 or precipitation recapture and is not believed to be the result of new leaks. The tritium measured in this well has been at or below tritium levels that have been historically measured in rainwater as a result of precipitation recapture from permitted gaseous releases. In August 2014, a break in the well piping was discovered about six feet below the surface that could have served as the entry point for tritium in the recapture water. Tritium present in well AR-7 has shown a gradual decrease since 2014. Should the water in these aquifers migrate to off-site wells used for drinking, the off-site dose consequence from tritium present in any of these three wells would be negligible.

There are no existing or new leaks evident at the site and all groundwater well sample results are well below the drinking water tritium standard of 20,000 pCi/L.

In December 2018, two new wells, AR-12 and AR-13, were installed near well AR-7. These wells were added to provide additional monitoring capabilities in the area directly west of plant structures. No tritium was detected in these wells during 2022.

Strontium-89 (Sr-89) and Strontium-90 (Sr-90) were not detected in any samples above their respective LLDs of 10 and 1 pCi/L.

Gross Alpha in the dissolved and suspended fractions were performed on 10 samples in 2022. Gross Alpha (dissolved) was not detected at any location above the MDC. Gross Alpha (suspended) was detected in one sample each at two locations. The positive detects for gross alpha (suspended) are believed to be due to turbid samples are not the result of plant releases.

Gamma-emitting nuclides were not detected in any sample locations above the MDC in 2022.

Hard-To Detect (HTD) analyses including americium-241 (Am-241), cerium isotopes (Cm-242, Cm-243/244), plutonium isotopes (Pu-238, Pu-239/240),

uranium isotopes (U-234, U-235, U-238), were performed at 2 locations in 2022.

The uranium isotopes were detected at one location. The presence of minor detections of uranium isotopes are likely due to regional geology.

Analysis of iron-55 (Fe-55) and nickel-63 (Ni-63) were performed at 9 groundwater locations in 2022. All analyses results were less than the MDC.

In assessing all the data gathered for this report, it was concluded that the operation of Byron Nuclear Generating Station had no adverse radiological impact on the environment, and there are no known active releases into the groundwater at Byron Nuclear Generating Station.

II.

Introduction The Byron Station, a two-unit PWR station, is located about two miles east of the Rock River and approximately three miles southwest of Byron in Ogle County, Illinois. The reactors are designed to have capacities of 1,268 and 1,241 MW gross, respectively. Unit One loaded fuel in November 1984 and went online February 2, 1985. Unit Two went online January 9, 1987.

This report covers those analyses performed by Teledyne Brown Engineering (TBE) on samples collected in 2022.

A.

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

1.

Identify suitable locations to monitor and evaluate potential impacts from station operations before significant 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 Byron Nuclear Generating Station as discussed below:

1.

Constellation and its consultant identified locations as described in the Phase 1 study. Phase 1 studies were conducted by Conestoga Rovers and Associates (CRA) and the results and conclusions were made available to state and federal regulators as well as the public.

2.

The Byron Nuclear Generating Station reports describe the local hydrogeologic regime. Periodically, the flow patterns on the surface and shallow subsurface are updated based on ongoing measurements.

3.

Byron Nuclear Generating Station will continue to perform routine sampling and radiological analysis of water from selected locations.

4.

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

5.

Byron Nuclear Generating Station staff and consulting hydrogeologist assess analytical results on an ongoing basis to identify adverse trends.

C.

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

Groundwater/Surface Water Samples of water are collected, managed, transported and analyzed in accordance with approved procedures following EPA methods.

Groundwater is collected from drilled wells. Surface water is collected from the Construction Runoff Pond (CROP), which collects stormwater runoff from the site protected area prior to discharge offsite. Sample locations, sample collection frequencies and analytical frequencies are controlled in accordance with approved station procedures. Contractor and/or station personnel are trained in the collection, preservation management, and shipment of samples, as well as in documentation of sampling events. Analytical laboratories are subject to internal quality assurance programs, industry cross-check programs, as well as nuclear industry audits. Station personnel review and evaluate all analytical data deliverables as data are received.

Analytical data results are reviewed by both station personnel and an independent hydrogeologist for adverse trends or changes to hydrogeologic conditions.

D.

Characteristics of Tritium (H-3)

Tritium (chemical symbol H-3) is a radioactive isotope of hydrogen. The most common form of tritium is tritium oxide, which is also called "tritiated water." The chemical properties of tritium are essentially those of ordinary hydrogen.

Tritiated water behaves the same as ordinary water in both the environment and the body. Tritium can be taken into the body by drinking water, breathing air, eating food, or absorption through skin. Once tritium enters the body, it disperses quickly and is uniformly distributed throughout the body. Tritium is excreted primarily through urine with a clearance rate characterized by an effective biological half-life of about 14 days. Within one month or so after ingestion, essentially all tritium is cleared. Organically bound tritium (tritium that is incorporated in organic compounds) can remain in the body for a longer period.

Tritium is produced naturally in the upper atmosphere when cosmic rays strike air molecules. Tritium is also produced during nuclear weapons explosions, as a by-product in reactors producing electricity, and in special production reactors, where the isotopes lithium-? and/or boron-10 are activated to produce tritium. Like normal water, tritiated water is colorless and odorless. Tritiated water behaves chemically and physically like non-tritiated water in the subsurface, and therefore tritiated water will travel at the same velocity as the average groundwater velocity.

Tritium has a half-life of approximately 12.3 years. It decays spontaneously to Helium-3 (3He). This radioactive decay releases a beta particle (low-energy electron). The radioactive decay of tritium is the source of the health risk from exposure to tritium. Tritium is one of the least dangerous radionuclides because it emits very weak radiation and leaves the body relatively quickly. Since tritium is almost always found as water, it goes directly into soft tissues and organs. The associated dose to these tissues is generally uniform and is dependent on the water content of the specific tissue.

Ill.

Program Description A.

Sample Analysis This section describes the general analytical methodologies used by TBE to analyze the environmental samples for radioactivity for the Byron Nuclear Generating Station RGPP in 2022.

In order to achieve the stated objectives, the current program includes the following analyses (as required by procedure):

1.

Concentrations of strontium in groundwater

2.

Concentrations of tritium in groundwater/surface water

3.

Concentrations of gamma nuclides in groundwater/surface water

4.

Concentrations of gross alpha monitoring in groundwater/surface water

5.

Concentrations of hard-to-detect nuclides (Fe-55 and Ni-63) in groundwater B.

Data Interpretation The radiological data collected prior to Byron Nuclear Generating Station becoming operational were used as a baseline with which these operational data were compared. For the purpose of this report, Byron Nuclear Generating 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. Constellation reports the uncertainty of a measurement created by statistical process (counting error) as well as all sources of error (Total Propagated Uncertainty or TPU). Each result has two values calculated. Constellation reports the TPU by following the result with plus or minus +/- the estimated sample standard deviation, 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.

C.

Background Analysis A pre-operational radiological environmental monitoring program (pre-operational REMP) was conducted to establish background radioactivity levels prior to operation of the Station. The environmental media sampled and analyzed during the pre-operational REMP were atmospheric radiation, fall-out, domestic water, surface water, marine life, and foodstuffs. The results of the monitoring were detailed in the report entitled, Environmental Radiological Monitoring for Byron Nuclear Generating Nuclear Power Station, Commonwealth Edison Company, Annual Report 1984, April 1985.

The pre-operational REMP contained analytical results from samples collected from the surface water and groundwater. All groundwater samples listed in the pre-Operational REMP report were <200 pCi/L.

1.

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

Additional detail may be found by consulting references (CRA 2006).

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 2006. RadNet provides tritium precipitation concentration data for samples collected at stations throughout the U.S. from 1960 up to and including 2006. Based on GNIP data for sample stations located in the U.S. Midwest, tritium concentrations peaked around 1963. This peak, which approached 10,000 pCi/L for some stations, coincided with the atmospheric testing of thermonuclear weapons. Tritium concentrations in surface water showed a sharp decline 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 RadNet surface water data typically has a reported

'Combined Standard Uncertainty' of 35 to 50 pCi/L. According to USEPA, this corresponds to a+/- 70 to 100 pCi/L 95% confidence bound on each given measurement. Therefore, the typical background data provided may be subject to measurement uncertainty of approximately +/- 70 to 100 pCi/L.

The radio-analytical laboratory is counting tritium results to a Constellation-specified LLD of 200 pCi/L. Typically, the lowest positive measurement will be reported within a range of 40 - 240 pCi/L or 140 +/- 100 pCi/L. Clearly, these sample results cannot be distinguished as different from background at this concentration.

IV.

Results and Discussion A.

Groundwater Results Groundwater 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 (Table 8-1.1, Appendix 8). Tritium values ranged from less than the detection limit to 590 pCi/L. Outside of the station boundary, tritium concentrations were all less than detection limit (<200 pCi/L). The tritium detected in groundwater samples has been isolated to the Galena-Platteville aquifer, which is isolated from the deeper regional groundwater aquifer by the semi-confining Glenwood Formation. Groundwater quality data from production wells and monitoring wells at the station located below this aquifer do not indicate concentrations of tritium greater than the LLD of 200 pCi/L. As such, the tritium impact is limited to the Galena-Platteville aquifer.

Strontium Strontium-89 (Sr-89) and Strontium-90 (Sr-90) were not detected in any samples above their respective LLDs of 10 and 1 pCi/L.

(Table 8-1.1, Appendix 8)

Gross Alpha (dissolved and suspended)

Gross Alpha in the dissolved fraction was not detected above the MDC on any of the 10 samples analyzed in 2022. Gross Alpha in the suspended fraction was detected in two samples with concentrations ranging from 2.4 to 4.5 pCi/L. (Table 8-1.1, Appendix 8)

Gamma Emitters No gamma-emitting nuclides were detected in groundwater samples in 2022. (Table 8-1.2, Appendix 8)

Hard-To-Detects Hard-To-Detect (HTD) analyses of iron-55 (Fe-55) and nickel-63 (Ni-63) were performed on nine groundwater samples. All results were less than the MDC. Eight other alpha spectroscopy HTD analyses were performed on two samples. Uranium-234 (U-234) and U-238 were detected in one sample with activities of 0.60 pCi/L and 0.39 pCi/L respectively. No other nuclides were detected above the MDC. (Table 8-1.3, Appendix 8)

8.

Drinking Water Well Survey No drinking water well surveys were conducted in 2022.

C.

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

D.

Leaks, Spills, and Releases There are no new previously unidentified leaks or plumes at Byron Station.

There were no new leaks, spills or releases at Byron Station in 2022.

E.

Trends Wells AR-4 and AR-11 have shown an overall decrease in tritium concentration since first sampled in 2006. Tritium has been measured in Well AR-7 since 2012, however, tritium has been previously measured in this well and it is believed to be the result of legacy tritium prior to 2006 or precipitation recapture, not the result of a new spill or leak.

F.

Investigations There were no investigations that took place in 2022 as a result of groundwater sample results.

G.

Actions Taken

1. Compensatory Actions No compensatory actions were initiated in 2022.

2. Installation of Monitoring Wells No new monitoring wells were installed in 2022.

3. Actions to Recover/Reverse Plumes No actions were undertaken to recover/reverse plumes in 2022.

APPENDIX A LOCATION DESIGNATION

Intentionally Left Blank

TABLEA-1:

Site AR-1 AR-2 AR-3 AR-4 AR-5 AR-6 AR-7 AR-8 AR-9 AR-10 AR-11 AR-12 AR-13 CAR-1 CAR-3 TW-13 CROP Radiological Groundwater Protection Program - Sampling Locations Distance and Direction, Byron Nuclear Generating Station, 2022 Site Type Temporar:v/Permanent Distance and Direction Monitoring Well Permanent 0.36 miles/NNW Monitoring Well Permanent 0.6 miles/NW Monitoring Well Permanent 0.8 miles/NW Monitoring Well Permanent 1.36 miles/WNW Monitoring Well Permanent 1.92 miles/WNW Monitoring Well Permanent 2.04 miles/WNW Monitoring Well Permanent 0.04 miles/W Monitoring Well Permanent 0.12 miles/S Monitoring Well Permanent 0.24 miles/E Monitoring Well Permanent 0.28 miles/NE Monitoring Well Permanent 1.36 miles/WNW Monitoring Well Permanent 366 feet/W Monitoring Well Permanent 461 feet/WSW Monitoring Well Permanent 2.25 miles/WNW Monitoring Well Permanent 0.16 miles/SE Monitoring Well Permanent 2.3 miles/WNW Surface Water Permanent 0.2 miles NE A-1

N w*

\\'

TW-13

~ CAR-1 AR-11 AR-4 DF-24 -$-

MW-3 MW-1

-1>-$-

4 4

AR-3 AR-2

-$- AR-1 AR-10

)>

I I\\)

+

CRQPA AR-12, AR-71

+

AR-9-$-

AR-13 CAR-3-$-

/41-AR-4 AR-11</>

AR-8-$-

1,000 2,000 Feet Explanation:

A.

Surface Water Monitoring Well Figure A-1 Monitoring Well Locations, Byron Nuclear Generating Station, 2022

APPENDIX B DATA TABLES

Intentionally Left Blank

TABLE 8-1.1 CONCENTRATIONS OF TRITIUM, STRONTIUM AND GROSS ALPHA IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF BYRON NUCLEAR GENERATING STATION, 2022 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE H-3 Sr-89 Sr-90 Gr-A (Dis)

Gr-A (Sus)

AR-1 03/15/22

< 170 AR-1 06/15/22

< 187

< 6.2

< 0.9

< 0.8

< 1.1 AR-1 08/31/22

< 197 AR-1 11/01/22

< 200 AR-2 06/15/22

< 185 AR-3 03/05/22

< 167 AR-3 06/15/22

< 184

< 6.7

< 0.8

< 1.0 2.4 +/- 1.2 AR-3 08/31/22

< 194 AR-3 11/03/22

< 187 AR-4 03/05/22 200 +/- 129 AR-4 06/15/22

< 190

< 5.3

< 0.9

< 1.0

< 1.1 AR-4 08/31/22 237 +/- 127 AR-4 11/03/22 327 +/- 135 AR-7 03/14/22

< 180 AR-7 06/15/22

< 174

< 6.5

< 0.8

< 1.2

< 1.1 AR-7 08/30/22

< 196 AR-7 10/31/22 211 +/- 122 AR-8 03/14/22

< 190 AR-8 06/14/22

< 187

< 8.6

< 1.0

< 0.6

< 1.2 AR-8 08/30/22

< 195 AR-8 10/31/22

< 183 AR-9 03/15/22

< 170 AR-9 06/15/22

< 186

< 7.2

< 0.9

< 1.1 AR-9 08/31/22

< 183 AR-9 11/01/22

< 179 AR-10 06/15/22

< 189 AR-11 06/15/22 590 +/- 154 AR-11 11/03/22 567 +/- 143 AR-12 03/15/22

< 186 AR-12 06/14/22

< 171

< 8.5

< 0.9

< 1.9

< 1.2 AR-12 08/30/22

< 183 AR-12 10/31/22

< 190 AR-13 03/15/22

< 186 AR-13 06/14/22

< 169

< 5.6

< 0.8

< 1.4

< 2.2 AR-13 08/30/22

< 189 AR-13 10/31/22

< 191 CAR-1 06/15/22

< 199 CAR-3 03/15/22

< 176 CAR-3 06/14/22

< 185

< 4.4

< 0.7

< 1.0 4.5 +/- 1.5 CAR-3 08/30/22

< 194 CAR-3 10/31/22

< 195

< 1.4

< 1.1

CROP 03/15/22 225 +/- 129

CROP 04/05/22 289 +/- 125

CROP 06/15/22

< 192

< 8.5

< 0.7

< 2.4

CROP 08/31/22

< 196

CROP 11/01/22

< 200

Surface Water Sample B-1

TABLE B-1.2 CONCENTRATIONS OF GAMMA EMITTERS IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF BYRON NUCLEAR GENERATING STATION, 2022 RESULTS IN UNITS OF PCI/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 AR-1 06/15/22

< 17

< 38

< 2

<4

< 2

< 3

< 2

< 4

< 6

< 2

<2

< 13

< 4 AR-2 06/15/22

< 16

< 19

< 2

<4

< 2

<4

<2

< 3

< 4

< 2

<2

< 11

< 4 AR-3 06/15/22

< 11

< 26

< 1

< 3

< 2

<2

< 1

< 2

< 3

< 1

< 7

<2 AR-4 06/15/22

< 16

< 35

< 2

< 4

< 2

<4

< 2

< 3

< 4

< 2

< 10

< 3 AR-7 06/15/22

< 14

< 1

<2

< 4

< 2

< 3

< 2

< 3

< 5

< 2

< 11

< 4 AR-8 06/14/22

< 15

< 1

< 2

< 3

< 2

< 3

< 2

< 3

< 5

< 2

< 1

< 11

< 3 AR-9 06/15/22

< 17

< 18

< 2

< 4

< 2

<4

< 2

< 4

<6

< 2

< 12

< 5 AR-10 06/15/22

< 14

< 22

< 1

< 3

< 2

< 3

< 1

< 3

< 5

< 1

< 11

< 4 AR-11 06/15/22

< 16

< 31

< 2

< 4

< 2

<4

< 2

< 3

< 4

< 2

< 10

< 3 AR-12 06/14/22

< 16

< 30

<2

< 2

< 4

< 2

< 3

<2

< 3

< 5

< 2

< 12

< 4 AR-13 06/14/22

< 15

<2

< 2

< 4

< 2

< 3

<2

< 3

< 5

< 2

< 12

<4 CAR-1 06/15/22

< 18

< 19

<2

< 2

< 4

< 2

< 4

< 2

< 4

< 2

< 10

<4 ttJ CAR-3 06/14/22

< 14

< 15

< 1

< 2

< 4

< 2

< 3

< 2

< 3

< 5

< 2

< 12

<4 I

CROP 06/15/22

< 14

< 15

< 2

< 4

< 2

< 3

< 2

< 3

< 5

< 2

< 11

<4 I\\)

Surface Water Sample

TABLE 8-1.3 CONCENTRATIONS OF HARD-TO-DETECTS IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF BYRON NUCLEAR GENERATNG STATION, 2022 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE Am-241 Cm-242 Cm-243/244 Pu-238 Pu-239/240 U-234 U-235 U-238 Fe-55 Ni-63 AR-1 06/15/22

< 140

< 3.8 AR-3 06/15/22

< 159

< 4.1 AR-4 06/15/22

< 78

< 3.9 AR-7 06/15/22

< 129

< 4.3 AR-8 06/14/22

< 111

< 4.2 AR-9 06/15/22

< 170

< 4.1 AR-12 06/14/22

< 0.09

< 0.03

< 0.12

< 0.10

< 0.10 0.59 +/- 0.26

< 0.18 0.29 +/- 0.18

< 132

< 4.0 AR-13 06/14/22

< 87

< 3.9 CAR-3 06/14/22

< 49

< 3.9 CAR-3 10/31/22

< 0.14

< 0.18

< 0.11

< 0.03

< 0.11

< 0.08

< 0.11 CJ I

c..i

Intentionally left blank

BYRON 2023-0022, 2022 Annual Radiological Environmental Operating Report (AREOR)

Contents

Text

Subject:

Attachment:

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

Navigation menu

BYRON 2023-0022, 2022 Annual Radiological Environmental Operating Report (AREOR)

Text

Subject:

Attachment:

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

Navigation menu

Search