Text

2023 Annual Radioactive Effluent Release Report
	ML24114A071
Person / Time
Site:	River Bend
Issue date:	04/23/2024
From:	Crawford R; Entergy Operations
To:	; Office of Nuclear Reactor Regulation, Document Control Desk
References
	RBG-48276
	Download: ML24114A071 (1)
	v • d • e

{{#Wiki_filter:~ entergy RBG-48276 April 23, 2024 ATTN: Document Control Desk U.S. Nuclear Regulatory Commission Washington, DC 20555-0001

Subject:

2023 Annual Radioactive Effluent Release Report River Bend Station - Unit 1 Renewed Operating License No. NPF-47 Docket No. 50-458 Randy Crawford Manager Regulatory Assurance 225-381-4177 Enclosed is the River Bend Station (RBS) Annual Radioactive Effluent Release Report for the period of January 1, 2023, through December 31, 2023. This report is submitted in accordance with the RBS Technical Specifications, Section 5.6.3. Should you have any questions regarding the enclosed, please contact Randy Crawford, at (225) 381-4177. Sincerely, Randy Crawford RTC/twf

Enclosure:

2023 Annual Radioactive Effluent Release Report cc: NRC Senior Resident Inspector - River Bend Station, Unit 1

Enclosure 2023 Annual Radioactive Effluent Release Report

entergy Plant: River Bend Nuclear Station Page 1 of 70 YEAR: 2023 Document Number: RBG-48276 Annual Radioactive Effluent Release Report Review and Approval: Site VP Sign GMPO f<'t,1111 tf!(rUIUI ~111-f:f<__ Print ~r BrJ \\Jer-+-t.. Sign Mgr, Regulatory Assurance 12 <>- ~ _,( 'f Cr:..w-forv{ Print Sr Mgr, Radiation Protection Mgr, Chemistry Peer Review Preparer \\( IIY\\btv\\j j * ~c,Q~ I-<- Print Print Print HA "'"'YI:> 411-1 o..1-r,;,,..,./- Print ~ Sign Sign Date Date Date Date Lf I I lR I l-'-J Date Date D'-{-1<,- Z~t.{ Date

Plant: River Bend Nuclear Station Year: 2023 Page 2 of 70 Annual Radioactive Effluent Release Report TABLE OF CONTENTS

1.0 INTRODUCTION

........................................................................................................................ 3 2.0 SUPPLEMENTAL INFORMATION.............................................................................................. 3 3.0 GASEOUS EFFLUENTS........................................................................................................... 13 4.0 LIQUID EFFLUENTS................................................................................................................ 17 5.0 SOLID WASTE

SUMMARY

...................................................................................................... 22 6.0 RADIOLOGICAL IMPACT TO MAN.......................................................................................... 24 7.0 METEORLOGICAL DATA......................................................................................................... 27 ATTACHMENTS - Groundwater Monitoring Well Sampling Results........................................................... 44

Plant: River Bend Nuclear Station Year: 2023 Page 3 of 70 Annual Radioactive Effluent Release Report

1.0 INTRODUCTION

This is the Annual Radioactive Effluent Release Report for the period of January 1, 2023, through December 31, 2023. This report is submitted in accordance with Technical Specification 5.6.3 of Appendix A to River Bend Station (RBS) License Number NPF-47. 2.0 SUPPLEMENTAL INFORMATION 2.1 Regulatory Limits 2.1.1 10CFR50, Appendix I Limits

1.

Fission and activation gases:

a.

In accordance with Technical Requirement (TR) 3.11.2.2, the air dose due to noble gases released in gaseous effluent to areas at and beyond the SITE BOUNDARY shall be limited to:

1)

Quarterly x Less than or equal to 5 mrads gamma x Less than or equal to 10 mrads beta

2)

Yearly x Less than or equal to 10 mrads gamma x Less than or equal to 20 mrads beta

2.

Iodine, tritium, and all radionuclides in particulate form with half-lives greater than 8 days.

a.

In accordance with Technical Requirement 3.11.2.3, the dose to a MEMBER OF THE PUBLIC from radioiodines (I-131 and I-133), tritium (H-3) and all radionuclides in particulate form with half-lives greater than 8 days, in gaseous effluent releases to areas at and beyond the SITE BOUNDARY shall be limited to:

1)

Quarterly x Less than or equal to 7.5 mrem to any organ

2)

Yearly x Less than or equal to 15 mrem to any organ

Plant: River Bend Nuclear Station Year: 2023 Page 4 of 70 Annual Radioactive Effluent Release Report

3.

Liquid Effluents Dose

a.

In accordance with Technical Requirement 3.11.1.2, the dose or dose commitment to a MEMBER OF THE PUBLIC from radioactive materials in liquid effluent released to UNRESTRICTED AREAS shall be limited to:

1)

Quarterly x Less than or equal to 1.5 mrem total body x Less than or equal to 5 mrem critical organ

2)

Yearly x Less than or equal to 3 mrem total body x Less than or equal to 10 mrem critical organ

4.

Total Dose (40CFR190)

a.

In accordance with Technical Requirement 3.11.4, the annual (calendar year) dose or dose commitment to any MEMBER OF THE PUBLIC, due to releases of radioactivity and to radiation from uranium fuel cycle sources, shall be limited to: x Less than or equal to 25 mrem, Total Body or any Organ except Thyroid. x Less than or equal to 75 mrem, Thyroid 2.1.2 Miscellaneous Limits

1.

Technical Requirement 3.11.2.1 - Fission and Activation Gases

a.

In accordance with Technical Requirement 3.11.2.1, the dose rate due to radioactive materials released in gaseous effluents from the site to areas at and beyond the SITE BOUNDARY shall be: x Less than or equal to 500 mrem/year to the total body x Less than or equal to 3000 mrem/year to the skin

2.

Technical Requirement 3.11.2.1 - Radioiodine (I-131 & I-133) and Particulate

a.

In accordance with Technical Requirement 3.11.2.1, the dose rate due to radioiodines, tritium, and all radionuclides in particulate form with half-lives greater than 8 days released in gaseous effluents from the site to areas at and beyond the SITE BOUNDARY shall be limited to: x Less than or equal to 1500 mrem/yr to any organ

Plant: River Bend Nuclear Station Year: 2023 Page 5 of 70 Annual Radioactive Effluent Release Report

3.

Technical Requirement 3.11.1.1 - Liquid Effluent

a.

In accordance with Technical Requirement 3.11.1.1, the concentration of radioactive material released in liquid effluent to UNRESTRICTED AREAS shall be limited to ten times the concentrations specified in 10CFR20, Appendix B, Table 2, Column 2 for radionuclides other than dissolved or entrained noble gases. For dissolved or entrained noble gases, the concentration shall be limited to 2.0E-04 microcuries/milliliter total concentration.

4.

Technical Requirement 3.11.2.5 - Ventilation Exhaust Treatment

a.

In accordance with Technical Requirement 3.11.2.5, the VENTILATION EXHAUST TREATMENT SYSTEM shall be used to reduce radioactive materials in gaseous waste prior to their discharge when the projected doses, due to gaseous effluent releases to areas and beyond the SITE BOUNDARY would exceed 0.3 mrem to any organ in a 31-day period.

5.

Technical Requirement 3.11.1.3 - Liquid Radwaste Treatment System

a.

In accordance with Technical Requirement 3.11.1.3, the liquid radwaste treatment system shall be used to reduce the radioactive materials in liquid waste prior to their discharge when the projected doses, due to the liquid effluent, to UNRESTRICTED AREAS would exceed 0.06 mrem to the total body or 0.2 mrem to any organ in a 31-day period. 2.2 Effluent Concentration Limits

1.

Gaseous Releases

a.

The concentrations of radioactive gaseous releases are based on the dose rate restrictions in RBS Technical Requirements, rather than the Effluent Concentration Limits (ECL) listed in 10CFR20 Appendix B, Table 2, Column 1.

2.

Liquid Releases

a.

The Effluent Concentration Limits of radioactive materials in liquid effluents are limited to ten times 10CFR20, Appendix B, Table 2, Column

2.

2.3 Measurements & Approximations of Total Radioactivity

1.

Gaseous Effluent

a.

Fission & activation gases Periodic grab samples are obtained from the Main Plant Exhaust Duct, Fuel Building Exhaust Vent and Radwaste Building Exhaust Vent. These samples are analyzed using high purity germanium detectors coupled to computerized pulse height analyzers. The sampling and analysis frequencies are described in Table 5.

Plant: River Bend Nuclear Station Year: 2023 Page 6 of 70 Annual Radioactive Effluent Release Report Sampling and analysis of these effluent streams provide noble gas radionuclide relative abundance that can then be applied to the noble gas gross activity and gross activity release rate to obtain nuclide specific activities and release rates. The noble gas gross activity released within a specific time period is determined by integrating the stack monitor release rate over the considered time period. If no activity was detected between the stack grab sample and a significant increase in hourly averages was recorded, the nuclide relative abundance of the last sample (or the last similar event), which indicated the presence of activity, was used to obtain nuclide specific activities. Correction factors for the monitors are derived and applied for each sampling period whenever noble gas radionuclides are detected in the effluent stream.

b.

Particulate and Radioiodine (I-131 & I-133) Particulates, Iodine-131 and Iodine-133 are continuously sampled from the three release points using a particulate filter and charcoal cartridge in line with a sample pump (stack monitor pump). These filters and charcoal cartridges are removed and analyzed in accordance with the frequencies specified in Table 5. Analysis is performed to identify and quantify radionuclides using high purity germanium detectors coupled to computerized pulse height analyzers. Given the nuclide specific activity concentrations, process flow rate, and duration of the sample, the nuclide specific activity released to the environment can be obtained. Due to the continuous sampling process, it is assumed that the radioactive material is released to the environment at a constant rate within the sampling period. Strontium-89, Strontium-90, and Gross alpha are quantitatively analyzed by counting by gas flow proportional counting.

c.

Tritium Tritium grab samples are obtained from the three gaseous release points at the specified frequencies listed in Table 5 using an ice bath condensation collection method. The collected sample is then analyzed using a liquid scintillation counter. Given the tritium concentration, process flow rate, and time period for which the sample is obtained, the tritium activity released to the environment can be determined. Due to the frequency of sampling, it is assumed that the tritium is released to the environment at a constant rate within the time period for which the sample is obtained.

Plant: River Bend Nuclear Station Year: 2023 Page 7 of 70 Annual Radioactive Effluent Release Report

d.

Carbon-14 The bounding annual dose from C-14 was calculated using guidance from Regulatory Guide 1.21, Revision 2, NUREG-0016, and the methodology in Regulatory Guide 1.109. The results of this calculation are listed in Table 14. The C-14 source term of 11 curies was taken from the site calculation PR(C)-359-3A, Gaseous Releases per NUREG-0016 Revision

1. Carbon-14 does not have dose factors associated with standing on contaminated ground; therefore, no ground plane dose was calculated.

There is no milk pathway within five miles of River Bend Station, so this pathway is not evaluated. RBS does not take credit for decay in the X/Q. This calculation assumes the inhalation, meat and vegetation pathways are at the site boundary in the sector with the highest X/Q. The dose from liquid effluents is not calculated as the dose contribution from C-14 is considered to be insignificant as indicated in Regulatory Guide 1.21, Revision 2. According to EPRI 1021106, Estimation of Carbon-14 in Nuclear Power Plant Gaseous Effluents, 95% of the carbon released is in the form of carbon dioxide and this contributes the highest dose to man. The ingestion pathway, specifically vegetation, is the most likely route of intake for man. An assumption has been made for gaseous releases that plants obtain all of their C-14 from carbon dioxide.

e.

Nickel-63 No Nickel-63 was quantified in 2023.

f.

Gaseous Effluent Summary Information Gaseous effluent summary information is located in Table 2, Table 3, and Table 4. It should be noted that an entry of 0.00E+00 Curie (Ci) or microcurie/second (uCi/sec) in this section indicates that the concentration of the particular radionuclide was below the Lower Limit of Detection (LLD) as listed in Table 5. Also, any nuclide not appearing in the tables was < LLD for all four quarters.

2.

Liquid Effluents

a.

Representative grab samples are obtained from the appropriate sample recovery tank and analyzed prior to release of the tank in accordance with the frequencies listed in Table 9. Analysis for gamma emitting nuclides (including dissolved and entrained noble gases) is performed using a high purity germanium detector coupled to a computerized pulse height analyzer. Tritium concentration is determined using a liquid scintillation counter. Strontium-89, Strontium-90, and Gross alpha analysis are performed using a gas flow proportional counter. Iron-55 is counted with a liquid scintillation counter after digestion of the iron. The activity of each nuclide released to the environment is determined from the nuclide specific concentration and total tank volume released.

b.

Liquid effluent summation information is located in Table 6 and Table 7. It should be noted that an entry of 0.00E+00 Ci or uCi/ml in this section indicates that the concentration of the particular radionuclide was below the Lower Limit of Detection (LLD) as listed in Table 9. Also, any nuclide not appearing in the tables was < LLD for all four quarters.

Plant: River Bend Nuclear Station Year: 2023 Page 8 of 70 Annual Radioactive Effluent Release Report

3.

Estimate of Total Error

a.

Liquid The maximum error associated with sample collection, laboratory analysis, and discharge volume is collectively estimated to be: Fission and Activation Products + 14.2% Tritium + 14.2% Dissolved and Entrained Noble Gases + 14.2% Gross Alpha Radioactivity + 14.2%

b.

Gaseous The maximum error (not including sample line loss) associated with sample flow, process flow, sample collection, monitor accuracy and laboratory analysis are collectively estimated to be: Noble Gases + 37.0% Iodines + 18.6% Particulate + 18.6% Tritium + 18.2%

c.

Determination of Total Error The total error (i.e., collective error due to sample collection, laboratory analysis, sample flow, process flow, monitor accuracy, etc.) is calculated using the following equation: = [()+ ()+... ()] Where: ET = total error E1... En = individual errors due to sample collection, laboratory analysis, sample flow, process flow, monitor accuracy, etc.

Plant: River Bend Nuclear Station Year: 2023 Page 9 of 70 Annual Radioactive Effluent Release Report 2.4 Batch Releases: 2.4.1 Liquid Batch releases and receiving stream flow from River Bend Station during the reporting period of January 1, 2023, through December 31, 2023 are shown in Table 8. The Mississippi River stream flow is obtained by averaging data from the U. S. Army Corp of Engineers website using flow gauge data at Tarbert Landing. 2.4.2 Gaseous There were no routine batch releases of gaseous effluents from River Bend Station during the reporting period of January 1, 2023, through December 31, 2023. 2.5 Abnormal Releases There was one abnormal release in 2023. An unplanned release of radioactive gasses from the Turbine Building occurred from 6/18/2023 to 6/24/2023. Specifically, both west and south roll-up doors were stuck partially open in a manner that exceeded the capacity of the Turbine Building ventilation exhaust fans to maintain a negative pressure in the building. This condition is described in CR-RBS-2023-05282. The release activity was monitored locally with portable air samplers and the release flowrate was measured with handheld anemometers. No ODCM limits were exceeded during this release. A summary of the release is provided in Table 1 below.

Plant: River Bend Nuclear Station Year: 2023 Page 10 of 70 Annual Radioactive Effluent Release Report Table 1, Abnormal Release Summary Release Duration 8640 minutes Release Volume 6.264E+07 cubic feet Isotope Total activity (Ci) Ag-110m 2.86E-07 I-131 1.12E-06 I-133 2.36E-05 Maximum Site Boundary Dose Rate (mRem/yr) Age Group Bone Liver Total Body Thyroid Kidney Lung GI-Lli Skin Child 3.653E-05 4.356E-05 1.744E-05 8.852E-03 7.239E-05 1.270E-04 1.308E-05 0.00E+00 Maximum Dose to Members of the Public (mRem) Age Group Bone Liver Total Body Thyroid Kidney Lung GI-Lli Skin Child 2.725E-06 2.868E-06 2.210E-06 2.724E-04 3.646E-06 3.777E-06 3.478E-06 1.976E-06 2.6 Major Changes to Radioactive Liquid, Gaseous, and Solid Waste Treatment Systems Engineering performed a review of the Maximo database to evaluate non-administrative design changes completed or partially completed during 2023 involving the subject systems (i.e. changes classified as evaluations or nuclear changes). These design changes were then reviewed to determine if there have been any major changes to the subject systems. The review was based on a major change being defined as a modification which affected the method of processing or the effluent from the system. Also, to be a major change the change must have affected the Updated Safety Analysis Report (USAR). No EC was identified as being completed during this time period that modified any radioactive waste system major component such that the processing method or effluent was changed. Also, no changes were identified affecting the method of processing solid, liquid or gaseous waste or the isotopic composition or the quantity of liquid, solid, or gaseous waste as described in the USAR. In conclusion, no design changes were completed during the specified time period that constituted a major change to either the liquid, solid or gaseous radwaste treatment systems.

Plant: River Bend Nuclear Station Year: 2023 Page 11 of 70 Annual Radioactive Effluent Release Report 2.7 Land Use Census Changes A Land Use Census was not conducted in 2023. The Land Use Census is performed every two years in accordance with procedure EN-CY-127, as required by the Technical Requirements Manual (TRM) (TR 3.12.2). The results of the Land Use Census are included in the Annual Radiological Environmental Operating Report pursuant to Technical Specification 5.6.2. 2.8 Effluent Monitor Instrument Inoperability 2.8.1 Radioactive Liquid Effluent Monitoring Instrumentation Operability The minimum number of channels required to be OPERABLE as described in Table 3.3.11.2-1 of Technical Requirement 3.3.11.2 were, if inoperable at any time in the period January 1, 2023, through December 31, 2023, restored to operable status within the required time. 2.8.2 Radioactive Gaseous Effluent Monitoring Instrumentation Operability The minimum number of channels required to be OPERABLE as described in Table 3.3.11.3-1 of Technical Requirement 3.3.11.3 were, if inoperable at any time in the period January 1, 2023, through December 31, 2023, restored to operable status within the required time. 2.9 Offsite Dose Calculation Manual Changes There were no changes to the Offsite Dose Calculation Manual in 2023. 2.10 Radiological Environmental Monitoring Program Changes There were no changes to the Radiological Environmental Monitoring Program during the reporting period January 1, 2023, through December 31, 2023. Process Control Program (PCP) Changes 2.11 Process Control Program (PCP) Changes There were no changes to the Process Control Program (PCP) in 2023. 2.12 NON-REMP Groundwater Monitoring Results (NEI 07-07) Ground water samples were taken in support of the Groundwater Protection Initiative (GPI). These samples are not part of the Radiological Environmental Monitoring Program. The sample results for 2023 are located in Table 19, Table 20, and Table 21. River Bend Station made no NEI 07-07 voluntary notifications in 2023. 2.13 Outside Tanks The maximum quantity of radioactive material, excluding tritium and dissolved or entrained noble gases, contained in any unprotected outdoor tank during the period of January 1, 2023, through December 31, 2023 was less than or equal to the 10 curie limit as required by Technical Specification 5.5.8.b.

Plant: River Bend Nuclear Station Year: 2023 Page 12 of 70 Annual Radioactive Effluent Release Report 2.14 Errata/Corrections to Previous ARERRs There were no Errata issued or corrections to previous ARERRs for the 2023 reporting period.

Plant: River Bend Nuclear Station Year: 2023 Page 13 of 70 Annual Radioactive Effluent Release Report 3.0 GASEOUS EFFLUENTS 3.1 Gas Effluent and Waste Disposal Report Table 2, Gaseous Effluents-Summation of All Releases A. Fission & Activation Gases Unit Quarter 1 Quarter 2 Quarter 3 Quarter 4 Annual

1.

Total Release Ci 3.13E+01 2.18E+02 3.63E+02 1.48E+02 7.60E+02

2.

Average release rate for the period PCi/sec 4.03E+00 2.77E+01 4.56E+01 1.86E+01 2.41E+01 B. Iodine

1.

Total Iodine-131 Ci 1.10E-03 2.01E-04 1.47E-02 1.03E-03 1.70E-02

2.

Average release rate for the period PCi/sec 1.41E-04 2.56E-05 1.85E-03 1.29E-04 5.39E-04 C. Particulates

1.

Particulates with half-lives > 8 days Ci 1.26E-04 1.38E-04 8.37E-05 4.83E-05 3.96E-04

2.

Average release rate for the period PCi/sec 1.63E-05 1.75E-05 1.05E-05 6.08E-06 1.26E-05 D. Tritium

1.

Total Release Ci 2.25E+00 2.70E-01 1.40E+00 7.79E-01 4.70E+00

2.

Average release rate for the period PCi/sec 2.90E-01 3.44E-02 1.76E-01 9.80E-02 1.49E-01 E. Gross Alpha

1.

Total Release Ci 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00

2.

Average release rate for the period PCi/sec 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 F. Carbon-14

1.

Total Release Ci 9.39E-01 3.65E-01 2.76E+00 1.73E+00 5.80E+00

2.

Average release rate for the period PCi/sec 1.21E-01 4.65E-02 3.47E-01 2.18E-01 1.84E-01

% of limit is located in the Radiological Impact to Man Table

Plant: River Bend Nuclear Station Year: 2023 Page 14 of 70 Annual Radioactive Effluent Release Report Table 3, Gaseous Effluents - Ground Level Release - Continuous Mode Radionuclide Released Unit Quarter 1 Quarter 2 Quarter 3 Quarter 4 Total Fission Gases Xe-133 Ci 8.71E-01 0.00E+00 0.00E+00 0.00E+00 8.71E-01 Xe-135m Ci 1.25E+00 7.12E-01 5.64E-01 2.61E+00 5.13E+00 Xe-135 Ci 7.12E-01 4.06E-01 3.23E-01 4.45E+01 4.59E+01 Total For Period Ci 2.83E+00 1.12E+00 8.87E-01 4.71E+01 5.19E+01 Iodines I-131 Ci 3.00E-05 5.01E-06 1.04E-04 6.24E-05 2.02E-04 I-133 Ci 0.00E+00 0.00E+00 9.13E-05 3.99E-05 1.31E-04 Total For Period Ci 3.00E-05 5.01E-06 1.96E-04 1.02E-04 3.33E-04 Particulates Mn-54 Ci 0.00E+00 1.44E-06 0.00E+00 0.00E+00 1.44E-06 Co-58 Ci 0.00E+00 9.14E-07 0.00E+00 0.00E+00 9.14E-07 Co-60 Ci 8.21E-06 1.92E-05 0.00E+00 1.92E-06 2.93E-05 Zn-65 Ci 2.71E-06 1.88E-05 0.00E+00 0.00E+00 2.15E-05 Total For Period Ci 1.09E-05 4.04E-05 0.00E+00 1.92E-06 5.32E-05 Tritium H-3 Ci 5.44E-01 1.61E-01 4.89E-01 3.93E-02 1.23E+00 Total For Period Ci 5.44E-01 1.61E-01 4.89E-01 3.93E-02 1.23E+00

Plant: River Bend Nuclear Station Year: 2023 Page 15 of 70 Annual Radioactive Effluent Release Report Table 4, Gaseous Effluents - Mixed Mode Release - Continuous Mode Radionuclide Released Unit Quarter 1 Quarter 2 Quarter 3 Quarter 4 Total Fission Gases Kr-85m Ci 1.68E-01 1.56E-01 0.00E+00 9.39E-01 1.26E+00 Kr-87 Ci 2.33E-02 4.67E-01 0.00E+00 8.21E-01 1.31E+00 Kr-88 Ci 2.33E-01 5.06E-01 0.00E+00 1.75E+00 2.49E+00 Xe-133m Ci 1.80E-01 0.00E+00 0.00E+00 7.48E-01 9.29E-01 Xe-133 Ci 6.21E+00 1.74E+00 1.97E-01 2.75E+01 3.56E+01 Xe-135m Ci 4.55E+00 8.43E+00 0.00E+00 1.33E+01 2.62E+01 Xe-135 Ci 1.71E+01 1.86E+02 3.62E+02 3.11E+01 5.96E+02 Xe-137 Ci 0.00E+00 8.06E+00 0.00E+00 1.25E+01 2.05E+01 Xe-138 Ci 0.00E+00 1.13E+01 0.00E+00 1.23E+01 2.36E+01 Total For Period Ci 2.85E+01 2.17E+02 3.62E+02 1.01E+02 7.08E+02 lodines I-131 Ci 1.07E-03 1.95E-04 1.46E-02 9.64E-04 1.68E-02 I-133 Ci 8.27E-03 2.37E-03 1.73E-02 6.51E-03 3.45E-02 Total For Period Ci 9.34E-03 2.57E-03 3.19E-02 7.47E-03 5.13E-02 Particulates Co-60 Ci 0.00E+00 0.00E+00 0.00E+00 1.19E-06 1.19E-06 Sr-89 Ci 8.79E-05 9.01E-05 4.41E-05 4.34E-05 2.65E-04 Ba-140 Ci 2.76E-05 7.19E-06 3.96E-05 1.76E-06 7.62E-05 Total For Period Ci 1.16E-04 9.73E-05 8.37E-05 4.64E-05 3.43E-04 Tritium H-3 Ci 1.71E+00 1.09E-01 9.07E-01 7.40E-01 3.46E+00 Total For Period Ci 1.71E+00 1.09E-01 9.07E-01 7.40E-01 3.46E+00

Plant: River Bend Nuclear Station Year: 2023 Page 16 of 70 Annual Radioactive Effluent Release Report Table 5, Radioactive Gaseous Waste Sampling and Analysis Program Gaseous Release Type Sampling Frequency Minimum Analysis Frequency Type of Activity Analysis Lower Limit of Detection (LLD) uC/ml Main Plant Exhaust Duct M Grab Sample M Principle Gamma Emitters 1.00E-04 H-3 1.00E-06 Fuel Building Ventilation Exhaust Duct M Grab Sample M Principle Gamma Emitters 1.00E-04 H-3 1.00E-06 Radwaste Building Ventilation Exhaust Duct M Grab Sample M Principle Gamma Emitters 1.00E-04 H-3 1.00E-06 All Release Types as listed above Continuous W Charcoal Sample I-131 1.00E-12 I-133 1.00E-10 Continuous W Particulate Sample Principle Gamma Emitters (I-131, Others) 1.00E-11 Continuous M Composite Particulate Sample Gross Alpha 1.00E-11 Continuous Q Composite Particulate Sample Sr-89, Sr-90 1.00E-11 Continuous Noble Gas Monitor Noble Gases Gross Beta or Gamma 1.00E-6 W = At least once per 7 days M = At least once per 31 days Q = At least once per 92 days

Plant: River Bend Nuclear Station Year: 2023 Page 17 of 70 Annual Radioactive Effluent Release Report 4.0 LIQUID EFFLUENTS 4.1 Liquid Effluent and Waste Disposal Report Table 6, Liquid Effluents-Summation of All Releases A Fission & Activation Products Unit Quarter 1 Quarter 2 Quarter 3 Quarter 4 Annual

1.

Total Release (not including tritium, gases or alpha) Ci 8.08E-04 3.18E-03 2.18E-03 9.74E-04 7.13E-03

2.

Average diluted concentration during period PCi/mL 9.96E-10 9.08E-09 1.94E-09 7.47E-10 1.99E-09 B. Tritium

1.

Total Release Ci 7.53E+00 4.36E+00 5.23E+00 1.58E+00 1.87E+01

2.

Average diluted concentration during period. PCi/mL 9.28E-06 1.25E-05 4.66E-06 1.21E-06 5.21E-06 C. Dissolved & Entrained Gases

1.

Total Release Ci 1.32E-02 5.84E-03 4.18E-02 6.96E-03 6.78E-02

2.

Average diluted concentration during period PCi/mL 1.62E-08 1.67E-08 3.73E-08 5.34E-09 1.89E-08 D. Gross Alpha Activity

1.

Total Release Ci 0.0E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 E. Volume Of Waste Released (prior to dilution) Liters 3.21E+06 3.70E+06 3.83E+06 1.17E+06 1.19E+07 F. Volume Of Dilution Water Used During Period Liters 8.12E+08 3.50E+08 1.12E+09 1.30E+09 3.59E+09 % of limit is located in the Radiological Impact to Man Table

Plant: River Bend Nuclear Station Year: 2023 Page 18 of 70 Annual Radioactive Effluent Release Report Table 7, Liquid Effluents - Batch Release Radionuclide Released Unit Quarter 1 Quarter 2 Quarter 3 Quarter 4 Total Fission and Activation Products Cr-51 Ci 1.84E-05 3.36E-06 0.00E+00 0.00E+00 2.17E-05 Mn-54 Ci 9.50E-06 1.65E-04 7.28E-05 6.95E-06 2.55E-04 Co-58 Ci 2.96E-06 1.62E-05 1.76E-05 3.21E-06 3.99E-05 Co-60 Ci 7.02E-04 2.79E-03 9.09E-04 9.33E-04 5.33E-03 Ni-65 Ci 0.00E+00 2.71E-05 2.55E-05 6.75E-06 5.94E-05 Zn-65 Ci 1.10E-05 1.47E-04 2.38E-04 1.42E-06 3.98E-04 Zn-69m Ci 3.14E-07 0.00E+00 0.00E+00 0.00E+00 3.14E-07 Sr-92 Ci 3.12E-06 0.00E+00 0.00E+00 0.00E+00 3.12E-06 Zr-97 Ci 0.00E+00 1.07E-06 0.00E+00 0.00E+00 1.07E-06 Nb-95 Ci 0.00E+00 5.81E-07 0.00E+00 0.00E+00 5.81E-07 Nb-97 Ci 1.79E-06 4.71E-06 2.71E-06 7.79E-06 1.70E-05 Mo-99 Ci 0.00E+00 0.00E+00 0.00E+00 6.05E-06 6.05E-06 Tc-99m Ci 0.00E+00 0.00E+00 0.00E+00 3.57E-07 3.57E-07 Ru-105 Ci 1.70E-06 0.00E+00 0.00E+00 0.00E+00 1.70E-06 Ag-110m Ci 2.08E-05 7.68E-06 3.58E-05 5.96E-07 6.49E-05 Rh-105 Ci 0.00E+00 1.77E-06 0.00E+00 0.00E+00 1.77E-06 Sb-124 Ci 0.00E+00 0.00E+00 3.85E-06 1.34E-06 5.19E-06 Sb-125 Ci 0.00E+00 1.86E-06 6.15E-06 0.00E+00 8.02E-06 Sb-127 Ci 0.00E+00 5.01E-06 0.00E+00 0.00E+00 5.01E-06 I-131 Ci 8.22E-06 0.00E+00 0.00E+00 0.00E+00 8.22E-06 I-132 Ci 0.00E+00 1.53E-06 7.60E-07 0.00E+00 2.29E-06 I-135 Ci 0.00E+00 0.00E+00 1.85E-05 0.00E+00 1.85E-05 Cs-134 Ci 0.00E+00 0.00E+00 5.76E-06 0.00E+00 5.76E-06 Cs-137 Ci 0.00E+00 4.88E-07 2.93E-05 0.00E+00 2.98E-05 Cs-138 Ci 0.00E+00 0.00E+00 0.00E+00 6.21E-06 6.21E-06 Ba-140 Ci 0.00E+00 0.00E+00 1.12E-06 0.00E+00 1.12E-06 Ba-142 Ci 0.00E+00 0.00E+00 7.92E-04 0.00E+00 7.92E-04

Plant: River Bend Nuclear Station Year: 2023 Page 19 of 70 Annual Radioactive Effluent Release Report Table 7, Liquid Effluents - Batch Release Fission and Activation Products (Continued) La-140 Ci 2.00E-05 0.00E+00 7.18E-06 0.00E+00 2.71E-05 La-142 Ci 0.00E+00 2.43E-06 0.00E+00 0.00E+00 2.43E-06 Ce-141 Ci 7.96E-06 0.00E+00 3.24E-06 0.00E+00 1.12E-05 Np-239 Ci 0.00E+00 0.00E+00 7.58E-06 0.00E+00 7.58E-06 Total For Period Ci 2.48E-04 1.25E-03 1.56E-03 2.05E-03 5.10E-03 Tritium H-3 Ci 7.53E+00 4.36E+00 5.23E+00 1.58E+00 1.87E+01 Total For Period Ci 7.53E+00 4.36E+00 5.23E+00 1.58E+00 1.87E+01 Radionuclide Released Unit Quarter 1 Quarter 2 Quarter 3 Quarter 4 Total Dissolved and Entrained Gases Kr-85 Ci 2.32E-04 0.00E+00 6.95E-05 0.00E+00 3.01E-04 Kr-88 Ci 0.00E+00 0.00E+00 3.22E-05 1.21E-05 4.43E-05 Kr-89 Ci 0.00E+00 0.00E+00 1.83E-03 0.00E+00 1.83E-03 Xe-131m Ci 0.00E+00 0.00E+00 2.51E-04 0.00E+00 2.51E-04 Xe-133m Ci 2.75E-04 1.31E-04 9.09E-04 1.23E-04 1.44E-03 Xe-133 Ci 7.40E-03 2.42E-03 2.16E-02 3.75E-03 3.52E-02 Xe-135 Ci 5.25E-03 3.29E-03 1.71E-02 3.07E-03 2.88E-02 Xe-138 Ci 0.00E+00 0.00E+00 5.84E-06 0.00E+00 5.84E-06 Total For Period Ci 1.32E-02 5.84E-03 4.18E-02 6.96E-03 6.78E-02

Plant: River Bend Nuclear Station Year: 2023 Page 20 of 70 Annual Radioactive Effluent Release Report Table 8, Supplemental Information for Liquid Effluents - Batch Mode Report for 2023 Units Quarter 1 Quarter 2 Quarter 3 Quarter 4 Year Number of releases 59 61 71 17 208 Total Release Time minutes 1.69E+04 1.89E+04 1.99E+04 5.95E+03 6.16E+04 Maximum Release Time minutes 3.47E+02 1.71E+03 3.08E+02 1.41E+03 1.71E+03 Average Release Time minutes 2.87E+02 3.10E+02 2.80E+02 3.50E+02 2.96E+02 Minimum Release Time minutes 9.80E+01 1.00E+00 1.43E+02 2.66E+02 1.00E+00 Units Quarter 1 Quarter 2 Quarter 3 Quarter 4 Average Mississippi River stream flow during periods of release into a flowing stream ft3/sec 650,887 539,637 237,470 171,492

Plant: River Bend Nuclear Station Year: 2023 Page 21 of 70 Annual Radioactive Effluent Release Report Table 9, Radioactive Liquid Waste Sampling and Analysis Program Liquid Release Type Sampling Frequency Minimum Analysis Frequency Type of Activity Analysis Lower Limit of Detection (LLD) uC/ml Batch Waste Release (Liquid Radwaste Recovery Sample Tanks) P Each Batch P Each Batch Principle Gamma Emitters; except Ce-144 5.00E-07 5.00E-06 I-131 1.00E-06 P Each Batch / M M Dissolved and Entrained Gases (Gamma Emitters) 1.00E-05 P Each Batch M Composite H-3 1.00E-05 Gross Alpha 1.00E-07 P Each Batch Q Composite Sr-89, Sr-90 5.00E-8 Fe-55 1.00E-06 P = Prior to each radioactive release M = At least once per 31 days Q = At least once per 92 days

Plant: River Bend Nuclear Station Year: 2023 Page 22 of 70 Annual Radioactive Effluent Release Report 5.0 SOLID WASTE

SUMMARY

5.1 Solid Waste Shipped Offsite for Burial or Disposal (Not Irradiated Fuel) 5.1.1 Types of Waste Table 10, Types of Solid Waste Summary Types of Waste Total Quantity (m3 ) Total Activity (Ci) Est. Total Error (%)

a. Spent resins, filter sludges, evaporator bottoms, etc.

5.39E+01 7.94E+02 25

b. Dry compressible waste, contaminated equip, etc.

2.40E+03 3.88E+00 25

c. Irradiated components, control rods, etc.

0.00E+00 0.00E+00 25

d. Other (Water, EHC, Waste Oil, etc.)

0.00E+00 0.00E+00 25 5.1.2 Estimate of major nuclide composition (by waste type) only >1% [Note 1] are reported. Table 11, Major Nuclides Major Nuclide Composition Isotope Curies

a. Resins, filters, evaporator bottoms, etc.

Mn-54 1.01% 8.01E+00 Fe-55 28.02% 2.22E+02 Co-60 65.01% 5.16E+02 Ni-63 1.03% 8.17E+00 Zn-65 2.51% 1.99E+01 Major Nuclide Composition Isotope Curies

b. Dry compressible waste, contaminated equip, etc.

Mn-54 1.71% 6.65E-02 Fe-55 35.20% 1.37E+00 Co-60 53.62% 2.08E+00 Ni-63 1.27% 4.92E-02 Zn-65 3.98% 1.54E-01 Sr-90 1.01% 3.91E-02

c. Irradiated components, control rods, etc.

N/A N/A N/A

d. Other (Water, EHC, Waste Oil, Etc.)

N/A N/A N/A Determined by Measurement & Correlation. Packaged in Strong, Tight Liners.

Plant: River Bend Nuclear Station Year: 2023 Page 23 of 70 Annual Radioactive Effluent Release Report No Solidification Agent or Absorbent Used. [Note 1] - Major" radionuclide is equivalent to a principle radionuclide, i.e. greater than 1 percent of total activity. 5.1.3 Solid Waste Disposition Table 12, Solid Waste Disposition (Specify Site or Unit) Number of Shipments Mode of Transportation Destination 43 Truck Energy Solutions (Bear Creek) - Oak Ridge, TN 45 Truck Energy Solutions (Memphis) 1790 Dock Street Table 13, Irradiated Fuel Shipments Disposition No Irradiated Fuel Shipments for 2023 Number of Shipments Mode of Transportation Destination N/A N/A N/A

Plant: River Bend Nuclear Station Year: 2023 Page 24 of 70 Annual Radioactive Effluent Release Report 6.0 RADIOLOGICAL IMPACT TO MAN 6.1 10CFR Part50, Appendix I Evaluation Table 14, Dose Assessment Quarter 1 Quarter 2 Quarter 3 Quarter 4 Annual Liquid Effluent Dose Limit, Total Body 1.5 mrem 1.5 mrem 1.5 mrem 1.5 mrem 3 mrem Total Body Dose 2.70E-06 8.58E-05 2.45E-05 2.40E-06 1.15E-04 % of Limit 1.80E-04 5.72E-03 1.63E-03 1.60E-04 3.84E-03 Liquid Effluent Dose Limit, Any Organ 5 mrem 5 mrem 5 mrem 5 mrem 10 mrem Maximum Organ Dose 1.29E-05 6.21E-04 1.28E-04 2.21E-05 7.84E-04 % of Limit 2.57E-04 1.24E-02 2.57E-03 4.42E-04 7.84E-03 Gaseous Effluent Dose Limit, Gamma Air 5 mrad 5 mrad 5 mrad 5 mrad 10 mrad Gamma Air Dose 1.35E-02 5.81E-02 7.63E-02 1.55E-01 3.03E-01 % of Limit 2.71E-01 1.16E+00 1.53E+00 3.10E+00 3.03E+00 Gaseous Effluent Dose Limit, Beta Air 10 mrad 10 mrad 10 mrad 10 mrad 20 mrad Beta Air Dose 1.04E-02 6.80E-02 9.50E-02 1.85E-01 3.59E-01 % of Limit 1.04E-01 6.80E-01 9.50E-01 1.85E+00 1.79E+00 Gaseous Effluent Organ Dose Limit (Iodine, Tritium, Particulates with > 8 day half-life) 7.5 mrem 7.5 mrem 7.5 mrem 7.5 mrem 15 mrem Gaseous Effluent Organ Dose (Iodine, Tritium, Particulates with > 8 day half-life) 4.82E-02 1.06E-02 4.96E-01 4.39E-02 5.99E-01 % of Limit 6.42E-01 1.42E-01 6.61E+00 5.86E-01 3.99E+00

Plant: River Bend Nuclear Station Year: 2023 Page 25 of 70 Annual Radioactive Effluent Release Report Table 15, Dose Assessment (continued) Quarter 1 Quarter 2 Quarter 3 Quarter 4 Annual Gaseous Effluent Organ Dose Limit (Carbon Bounding Calculation) 7.5 mrem 7.5 mrem 7.5 mrem 7.5 mrem 15 mrem Gaseous Effluent Organ Dose (Carbon Bounding Calculation) 4.01E-01 1.56E-01 1.18E+00 7.40E-01 2.47E+00 % of Limit 5.34E+00 2.08E+00 1.57E+01 9.86E+00 1.65E+01 6.2 Dose to Members of the Public Inside the Site Boundary The maximally exposed member of the pubic was calculated to be member of the West Feliciana Parish Sheriff's Office (WFPSO) that opened a substation in a facility within the site boundary beginning in 2019. The office is estimated to be occupied during normal work hours for 2000 hours per year. It should be noted that the liquid effluent pathway dose was not considered since the individual would not engage in activities that would allow exposure to this pathway. Location Annual Critical Organ Dose (mrem) Annual Total Body Dose (mrem) Annual Skin Dose (mrem) Annual Duration Factor Alligator Bayou 2.65E-05 1.53E-06 4.72E-07 4.57E-03 Deer Hunters 1.06E-03 1.13E-04 4.40E-05 2.92E-02 Onsite RV Park 2.47E-03 2.64E-04 1.03E-04 6.82E-02 WFPSO Building 8.29E-03 8.85E-04 3.44E-04 2.28E-01

Plant: River Bend Nuclear Station Year: 2023 Page 26 of 70 Annual Radioactive Effluent Release Report 6.3 40CFR Part 190 Evaluation for an Individual in the Unrestricted Area An assessment (see Table 16) was made of radiation doses to the likely most-exposed member of the public from River Bend and other nearby uranium fuel cycle sources (none within five miles). The annual (calendar year) dose or dose commitment to any MEMBER OF THE PUBLIC, due to releases of radioactivity and to radiation from uranium fuel cycle sources, shall be limited to less than or equal to 25 mrem to the total body or any organ, except the thyroid, which shall be limited to less than or equal to 75 mrem. Table 16, EPA 40 CFR PART 190 Evaluation Total Body Thyroid Any Other Organ Dose Limit 25 mrem 75 mrem 25 mrem Dose (Excluding C-14) 2.97E-01 6.90E-01 2.98E-01 % of Limit 1.19E+00 9.20E-01 1.19E+00 Dose (Including C-14) 7.91E-01 1.18E+00 2.77E+00 % of Limit 3.17E+00 1.58E+00 1.11E+01 Gaseous dose including a bounding calculation of C-14 dose, direct shine, ISFSI and any other nuclear power related facility within 5 miles of the station are considered when calculating dose compliance with 40 CFR 190.

Plant: River Bend Nuclear Station Year: 2023 Page 27 of 70 Annual Radioactive Effluent Release Report 7.0 METEORLOGICAL DATA Cumulative joint frequency distributions and annual average data for continuous releases are listed below. The meteorological recovery for 2023 was 96%. 7.1 Joint Frequency Distributions All Stability Classes Period of Record: 01/01/2023 - 12/31/2023 Elevation: Primary Sensors - 30 Foot Wind Speed (meters/second) Wind Direction 0.22-0.50 0.51-0.75 0.76-1.0 1.1-1.5 1.6-2.0 2.1-3.0 3.1-5.0 5.1-7.0 7.1-10.0 10.1-13.0 13.1-18.0 >18.0 Total N 83 61 79 134 105 155 37 0 0 0 0 0 654 NNE 93 79 74 121 116 67 2 0 0 0 0 0 552 NE 91 47 71 116 133 61 0 0 0 0 0 0 519 ENE 82 96 74 97 76 26 0 0 0 0 0 0 451 E 46 99 83 93 69 26 0 0 0 0 0 0 416 ESE 26 57 93 131 55 25 5 0 0 0 0 0 392 SE 21 53 81 184 176 162 15 0 0 0 0 0 692 SSE 29 35 66 153 113 186 146 0 0 0 0 0 728 S 28 41 76 144 112 150 47 0 0 0 0 0 598 SSW 17 47 74 116 77 105 17 0 0 0 0 0 453 SW 30 69 55 69 92 91 27 0 0 0 0 0 433 WSW 50 82 53 65 77 104 4 0 0 0 0 0 435 W 63 118 42 68 95 119 14 0 0 0 0 0 519 WNW 83 116 62 79 73 91 21 0 0 0 0 0 525 NW 65 93 53 61 77 94 39 0 0 0 0 0 482 NNW 62 70 58 75 94 132 91 0 0 0 0 0 582 TOTAL 869 1163 1094 1706 1540 1594 465 0 0 0 0 0 8431 Number of Calms: 0 Number of Invalid Hours: 329 Number of Valid Hours: 8431 Total Hours for the Period: 8760

Plant: River Bend Nuclear Station Year: 2023 Page 28 of 70 Annual Radioactive Effluent Release Report Stability Class A Period of Record: 01/01/2023 - 12/31/2023 Elevation: Primary Sensors - 30 Foot Wind Speed (meters/second) Wind Direction 0.22-0.50 0.51-0.75 0.76-1.0 1.1-1.5 1.6-2.0 2.1-3.0 3.1-5.0 5.1-7.0 7.1-10.0 10.1-13.0 13.1-18.0 >18.0 Total N 0 0 0 19 25 60 21 0 0 0 0 0 125 NNE 0 0 2 13 53 42 2 0 0 0 0 0 112 NE 0 0 2 12 53 41 0 0 0 0 0 0 108 ENE 0 0 1 8 41 13 0 0 0 0 0 0 63 E 0 0 1 24 41 20 0 0 0 0 0 0 86 ESE 0 0 2 28 33 21 1 0 0 0 0 0 85 SE 0 0 1 16 56 82 8 0 0 0 0 0 163 SSE 0 0 1 11 27 64 49 0 0 0 0 0 152 S 0 0 2 14 28 64 16 0 0 0 0 0 124 SSW 0 0 0 11 27 63 7 0 0 0 0 0 108 SW 0 0 2 18 54 54 14 0 0 0 0 0 142 WSW 0 0 1 28 64 92 0 0 0 0 0 0 185 W 0 0 2 33 83 104 10 0 0 0 0 0 232 WNW 0 0 1 31 49 61 12 0 0 0 0 0 154 NW 0 0 1 12 33 49 21 0 0 0 0 0 116 NNW 0 0 2 6 34 44 59 0 0 0 0 0 145 TOTAL 0 0 21 284 701 874 220 0 0 0 0 0 2100 Number of Calms: 0 Number of Invalid Hours: 0 Number of Valid Hours: 2100 Total Hours for the Period: 2100

Plant: River Bend Nuclear Station Year: 2023 Page 29 of 70 Annual Radioactive Effluent Release Report Stability Class B Period of Record: 01/01/2023 - 12/31/2023 Elevation: Primary Sensors - 30 Foot Wind Speed (meters/second) Wind Direction 0.22-0.50 0.51-0.75 0.76-1.0 1.1-1.5 1.6-2.0 2.1-3.0 3.1-5.0 5.1-7.0 7.1-10.0 10.1-13.0 13.1-18.0 >18.0 Total N 0 0 0 2 4 9 4 0 0 0 0 0 19 NNE 0 0 1 3 6 7 0 0 0 0 0 0 17 NE 0 0 1 3 9 1 0 0 0 0 0 0 14 ENE 0 0 0 4 3 0 0 0 0 0 0 0 7 E 0 1 2 2 3 0 0 0 0 0 0 0 8 ESE 0 1 1 4 1 0 0 0 0 0 0 0 7 SE 0 0 2 10 8 0 0 0 0 0 0 0 20 SSE 0 0 1 4 2 11 9 0 0 0 0 0 27 S 0 0 1 2 8 6 1 0 0 0 0 0 18 SSW 0 0 0 2 5 6 1 0 0 0 0 0 14 SW 0 0 1 5 3 2 3 0 0 0 0 0 14 WSW 0 0 2 6 6 4 1 0 0 0 0 0 19 W 0 0 0 2 3 5 0 0 0 0 0 0 10 WNW 0 0 0 1 3 7 1 0 0 0 0 0 12 NW 0 0 0 1 4 6 2 0 0 0 0 0 13 NNW 0 0 1 1 3 10 3 0 0 0 0 0 18 TOTAL 0 2 13 52 71 74 25 0 0 0 0 0 237 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 237 TOTAL HOURS FOR THE PERIOD: 237

Plant: River Bend Nuclear Station Year: 2023 Page 30 of 70 Annual Radioactive Effluent Release Report Stability Class C Period of Record: 01/01/2023 - 12/31/2023 Elevation: Primary Sensors - 30 Foot Wind Speed (meters/second) Wind Direction 0.22-0.50 0.51-0.75 0.76-1.0 1.1-1.5 1.6-2.0 2.1-3.0 3.1-5.0 5.1-7.0 7.1-10.0 10.1-13.0 13.1-18.0 >18.0 Total N 0 0 2 5 8 14 5 0 0 0 0 0 34 NNE 0 0 2 11 5 2 0 0 0 0 0 0 20 NE 0 0 0 5 10 2 0 0 0 0 0 0 17 ENE 0 0 1 6 5 2 0 0 0 0 0 0 14 E 0 0 2 3 3 0 0 0 0 0 0 0 8 ESE 0 0 3 6 1 0 0 0 0 0 0 0 10 SE 0 0 2 5 3 1 0 0 0 0 0 0 11 SSE 0 0 1 3 2 10 16 0 0 0 0 0 32 S 0 0 0 3 2 5 3 0 0 0 0 0 13 SSW 0 0 0 2 4 1 1 0 0 0 0 0 8 SW 0 0 0 3 4 5 2 0 0 0 0 0 14 WSW 0 0 1 4 3 4 0 0 0 0 0 0 12 W 0 0 0 4 2 3 1 0 0 0 0 0 10 WNW 0 0 0 2 3 4 2 0 0 0 0 0 11 NW 0 0 0 2 4 8 1 0 0 0 0 0 15 NNW 0 0 0 2 3 8 6 0 0 0 0 0 19 TOTAL 0 0 14 66 62 69 37 0 0 0 0 0 248 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 248 TOTAL HOURS FOR THE PERIOD: 248

Plant: River Bend Nuclear Station Year: 2023 Page 31 of 70 Annual Radioactive Effluent Release Report Stability Class D Period of Record: 01/01/2023 - 12/31/2023 Elevation: Primary Sensors - 30 Foot Wind Speed (meters/second) Wind Direction 0.22-0.50 0.51-0.75 0.76-1.0 1.1-1.5 1.6-2.0 2.1-3.0 3.1-5.0 5.1-7.0 7.1-10.0 10.1-13.0 13.1-18.0 >18.0 Total N 1 5 8 30 49 65 7 0 0 0 0 0 165 NNE 0 4 9 47 35 13 0 0 0 0 0 0 108 NE 0 5 18 45 49 12 0 0 0 0 0 0 129 ENE 0 2 19 35 17 9 0 0 0 0 0 0 82 E 0 10 15 15 9 5 0 0 0 0 0 0 54 ESE 1 6 21 29 9 3 4 0 0 0 0 0 73 SE 0 3 11 40 40 51 7 0 0 0 0 0 152 SSE 0 2 7 28 37 86 66 0 0 0 0 0 226 S 0 2 14 31 31 59 23 0 0 0 0 0 160 SSW 1 1 10 25 21 29 8 0 0 0 0 0 95 SW 0 4 8 15 23 26 8 0 0 0 0 0 84 WSW 0 1 11 15 3 4 3 0 0 0 0 0 37 W 0 7 13 19 6 6 3 0 0 0 0 0 54 WNW 0 6 12 14 13 15 5 0 0 0 0 0 65 NW 0 4 7 14 20 25 14 0 0 0 0 0 84 NNW 0 2 10 19 29 55 20 0 0 0 0 0 135 TOTAL 3 64 193 421 391 463 168 0 0 0 0 0 1703 NUMBER OF CALMS: 1 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 1703 TOTAL HOURS FOR THE PERIOD: 1703

Plant: River Bend Nuclear Station Year: 2023 Page 32 of 70 Annual Radioactive Effluent Release Report Stability Class E Period of Record: 01/01/2023 - 12/31/2023 Elevation: Primary Sensors - 30 Foot Wind Speed (meters/second) Wind Direction 0.22-0.50 0.51-0.75 0.76-1.0 1.1-1.5 1.6-2.0 2.1-3.0 3.1-5.0 5.1-7.0 7.1-10.0 10.1-13.0 13.1-18.0 >18.0 Total N 5 11 33 67 19 3 0 0 0 0 0 0 138 NNE 5 21 36 41 17 3 0 0 0 0 0 0 123 NE 6 19 33 43 12 5 0 0 0 0 0 0 118 ENE 5 21 30 33 9 2 0 0 0 0 0 0 100 E 4 23 27 41 13 1 0 0 0 0 0 0 109 ESE 5 21 39 53 10 1 0 0 0 0 0 0 129 SE 4 18 48 105 69 28 0 0 0 0 0 0 272 SSE 7 15 36 85 40 15 6 0 0 0 0 0 204 S 7 17 44 81 43 16 4 0 0 0 0 0 212 SSW 4 21 54 69 20 6 0 0 0 0 0 0 174 SW 4 36 27 26 8 4 0 0 0 0 0 0 105 WSW 6 28 30 11 1 0 0 0 0 0 0 0 76 W 6 32 15 9 0 0 0 0 0 0 0 0 62 WNW 4 23 28 24 5 4 1 0 0 0 0 0 89 NW 4 19 24 24 14 6 1 0 0 0 0 0 92 NNW 5 19 22 43 25 14 1 0 0 0 0 0 129 TOTAL 81 344 526 755 305 108 13 0 0 0 0 0 2132 NUMBER OF CALMS: 2 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 2132 TOTAL HOURS FOR THE PERIOD: 2132

Plant: River Bend Nuclear Station Year: 2023 Page 33 of 70 Annual Radioactive Effluent Release Report Stability Class F Period of Record: 01/01/2023 - 12/31/2023 Elevation: Primary Sensors - 30 Foot Wind Speed (meters/second) Wind Direction 0.22-0.50 0.51-0.75 0.76-1.0 1.1-1.5 1.6-2.0 2.1-3.0 3.1-5.0 5.1-7.0 7.1-10.0 10.1-13.0 13.1-18.0 >18.0 Total N 10 19 13 8 0 0 0 0 0 0 0 0 50 NNE 11 28 21 6 0 0 0 0 0 0 0 0 66 NE 19 11 15 7 0 0 0 0 0 0 0 0 52 ENE 8 19 15 10 1 0 0 0 0 0 0 0 53 E 8 31 24 8 0 0 0 0 0 0 0 0 71 ESE 12 19 25 11 1 0 0 0 0 0 0 0 68 SE 8 23 11 6 0 0 0 0 0 0 0 0 48 SSE 10 13 17 22 5 0 0 0 0 0 0 0 67 S 8 17 15 12 0 0 0 0 0 0 0 0 52 SSW 6 16 10 7 0 0 0 0 0 0 0 0 39 SW 16 22 12 2 0 0 0 0 0 0 0 0 52 WSW 22 31 5 1 0 0 0 0 0 0 0 0 59 W 18 37 10 1 1 0 0 0 0 0 0 0 67 WNW 23 35 10 6 0 0 0 0 0 0 0 0 74 NW 12 14 13 8 2 0 0 0 0 0 0 0 49 NNW 8 20 14 3 0 0 1 0 0 0 0 0 46 TOTAL 199 355 230 118 10 0 1 0 0 0 0 0 913 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 913 TOTAL HOURS FOR THE PERIOD: 913

Plant: River Bend Nuclear Station Year: 2023 Page 34 of 70 Annual Radioactive Effluent Release Report Stability Class G Period of Record: 01/01/2023 - 12/31/2023 Elevation: Primary Sensors - 30 Foot Wind Speed (meters/second) Wind Direction 0.22-0.50 0.51-0.75 0.76-1.0 1.1-1.5 1.6-2.0 2.1-3.0 3.1-5.0 5.1-7.0 7.1-10.0 10.1-13.0 13.1-18.0 >18.0 Total N 67 26 23 3 0 4 0 0 0 0 0 0 123 NNE 77 26 3 0 0 0 0 0 0 0 0 0 106 NE 66 12 2 1 0 0 0 0 0 0 0 0 81 ENE 69 54 8 1 0 0 0 0 0 0 0 0 132 E 34 34 12 0 0 0 0 0 0 0 0 0 80 ESE 8 10 2 0 0 0 0 0 0 0 0 0 20 SE 9 9 6 2 0 0 0 0 0 0 0 0 26 SSE 12 5 3 0 0 0 0 0 0 0 0 0 20 S 13 5 0 1 0 0 0 0 0 0 0 0 19 SSW 6 9 0 0 0 0 0 0 0 0 0 0 15 SW 10 7 5 0 0 0 0 0 0 0 0 0 22 WSW 22 22 3 0 0 0 0 0 0 0 0 0 47 W 39 42 2 0 0 1 0 0 0 0 0 0 84 WNW 56 52 11 1 0 0 0 0 0 0 0 0 120 NW 49 56 8 0 0 0 0 0 0 0 0 0 113 NNW 49 29 9 1 0 1 1 0 0 0 0 0 90 TOTAL 586 398 97 10 0 6 1 0 0 0 0 0 1098 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 1098 TOTAL HOURS FOR THE PERIOD: 1098

Plant: River Bend Nuclear Station Year: 2023 Page 35 of 70 Annual Radioactive Effluent Release Report All Stability Classes Period of Record: 01/01/2023 - 12/31/2023 Elevation: Primary Sensors - 150 Foot Wind Speed (meters/second) Wind Direction 0.22-0.50 0.51-0.75 0.76-1.0 1.1-1.5 1.6-2.0 2.1-3.0 3.1-5.0 5.1-7.0 7.1-10.0 10.1-13.0 13.1-18.0 >18.0 Total N 0 0 8 29 53 190 232 21 0 0 0 0 533 NNE 0 4 10 34 72 285 162 2 0 0 0 0 569 NE 0 2 8 25 65 274 240 5 0 0 0 0 619 ENE 0 3 7 35 53 168 214 17 1 0 0 0 498 E 0 1 11 42 85 166 126 20 0 0 0 0 451 ESE 0 1 7 27 57 225 390 58 5 0 0 0 770 SE 0 2 4 26 56 168 239 25 3 0 0 0 523 SSE 0 1 5 31 46 134 184 68 1 0 0 0 470 S 0 3 12 34 64 202 236 55 0 0 0 0 606 SSW 0 2 6 35 63 291 220 15 0 0 0 0 632 SW 0 1 8 41 96 262 119 25 1 0 0 0 553 WSW 1 3 8 33 94 250 78 9 0 0 0 0 476 W 0 0 8 54 95 241 110 7 2 0 0 0 517 WNW 0 2 4 38 53 151 91 12 1 0 0 0 352 NW 0 2 5 34 43 156 126 19 1 0 0 0 386 NNW 0 3 1 18 41 168 198 47 0 0 0 0 476 TOTAL 1 30 112 536 1036 3331 2965 405 15 0 0 0 8431 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 329 NUMBER OF VALID HOURS: 8431 TOTAL HOURS FOR THE PERIOD: 8760

Plant: River Bend Nuclear Station Year: 2023 Page 36 of 70 Annual Radioactive Effluent Release Report Stability Class A Period of Record: 01/01/2023 - 12/31/2023 Elevation: Primary Sensors - 150 Foot Wind Speed (meters/second) Wind Direction 0.22-0.50 0.51-0.75 0.76-1.0 1.1-1.5 1.6-2.0 2.1-3.0 3.1-5.0 5.1-7.0 7.1-10.0 10.1-13.0 13.1-18.0 >18.0 Total N 0 0 0 2 14 41 52 14 0 0 0 0 123 NNE 0 0 0 11 10 46 24 0 0 0 0 0 91 NE 0 0 0 7 9 59 43 0 0 0 0 0 118 ENE 0 0 0 4 8 28 50 0 0 0 0 0 90 E 0 0 0 1 18 42 35 4 0 0 0 0 100 ESE 0 0 0 4 8 35 40 9 0 0 0 0 96 SE 0 0 0 3 8 38 45 5 0 0 0 0 99 SSE 0 0 0 4 8 22 42 14 0 0 0 0 90 S 0 0 0 3 16 36 57 16 0 0 0 0 128 SSW 0 0 1 3 8 40 50 1 0 0 0 0 103 SW 0 0 1 10 25 49 37 8 0 0 0 0 130 WSW 0 0 1 6 25 104 48 2 0 0 0 0 186 W 0 0 1 6 34 136 77 4 1 0 0 0 259 WNW 0 0 0 9 21 51 41 6 1 0 0 0 129 NW 0 0 0 9 17 28 37 5 1 0 0 0 97 NNW 0 0 0 4 8 34 52 25 0 0 0 0 123 TOTAL 0 0 4 86 237 789 730 113 3 0 0 0 1962 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 1962 TOTAL HOURS FOR THE PERIOD: 1962

Plant: River Bend Nuclear Station Year: 2023 Page 37 of 70 Annual Radioactive Effluent Release Report Stability Class B Period of Record: 01/01/2023 - 12/31/2023 Elevation: Primary Sensors - 150 Foot Wind Speed (meters/second) Wind Direction 0.22-0.50 0.51-0.75 0.76-1.0 1.1-1.5 1.6-2.0 2.1-3.0 3.1-5.0 5.1-7.0 7.1-10.0 10.1-13.0 13.1-18.0 >18.0 Total N 0 0 0 0 1 3 8 2 0 0 0 0 14 NNE 0 0 0 0 3 10 11 0 0 0 0 0 24 NE 0 0 0 1 4 6 13 0 0 0 0 0 24 ENE 0 0 1 2 2 3 7 0 0 0 0 0 15 E 0 0 1 2 3 8 6 3 0 0 0 0 23 ESE 0 0 0 0 2 9 16 3 0 0 0 0 30 SE 0 0 1 1 3 6 19 1 0 0 0 0 31 SSE 0 0 0 1 3 8 15 2 0 0 0 0 29 S 0 0 0 2 2 4 7 3 0 0 0 0 18 SSW 0 0 0 0 1 6 10 0 0 0 0 0 17 SW 0 0 0 2 2 5 4 4 0 0 0 0 17 WSW 0 0 0 2 6 10 5 2 0 0 0 0 25 W 0 0 0 3 3 8 7 0 0 0 0 0 21 WNW 0 0 0 2 1 5 4 1 0 0 0 0 13 NW 0 0 1 1 1 3 7 2 0 0 0 0 15 NNW 0 0 0 0 3 3 11 3 0 0 0 0 20 TOTAL 0 0 4 19 40 97 150 26 0 0 0 0 336 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 336 TOTAL HOURS FOR THE PERIOD: 336

Plant: River Bend Nuclear Station Year: 2023 Page 38 of 70 Annual Radioactive Effluent Release Report Stability Class C Period of Record: 01/01/2023 - 12/31/2023 Elevation: Primary Sensors - 150 Foot Wind Speed (meters/second) Wind Direction 0.22-0.50 0.51-0.75 0.76-1.0 1.1-1.5 1.6-2.0 2.1-3.0 3.1-5.0 5.1-7.0 7.1-10.0 10.1-13.0 13.1-18.0 >18.0 Total N 0 0 2 1 1 7 20 1 0 0 0 0 32 NNE 0 0 0 1 7 9 7 0 0 0 0 0 24 NE 0 0 1 1 0 13 8 1 0 0 0 0 24 ENE 0 0 0 0 2 7 6 3 0 0 0 0 18 E 0 1 0 2 7 3 7 0 0 0 0 0 20 ESE 0 0 0 2 1 5 12 3 0 0 0 0 23 SE 0 0 0 1 2 3 2 2 0 0 0 0 10 SSE 0 0 0 1 2 1 11 7 0 0 0 0 22 S 0 0 0 0 3 2 6 9 0 0 0 0 20 SSW 0 0 0 0 2 4 5 0 0 0 0 0 11 SW 0 0 0 1 1 4 5 1 0 0 0 0 12 WSW 0 0 0 0 3 4 4 0 0 0 0 0 11 W 0 0 0 1 1 6 3 1 1 0 0 0 13 WNW 0 0 0 0 1 1 4 0 0 0 0 0 6 NW 0 0 0 1 2 4 12 2 0 0 0 0 21 NNW 0 0 0 1 1 4 8 1 0 0 0 0 15 TOTAL 0 1 3 13 36 77 120 31 1 0 0 0 282 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 282 TOTAL HOURS FOR THE PERIOD: 282

Plant: River Bend Nuclear Station Year: 2023 Page 39 of 70 Annual Radioactive Effluent Release Report Stability Class D Period of Record: 01/01/2023 - 12/31/2023 Elevation: Primary Sensors - 150 Foot Wind Speed (meters/second) Wind Direction 0.22-0.50 0.51-0.75 0.76-1.0 1.1-1.5 1.6-2.0 2.1-3.0 3.1-5.0 5.1-7.0 7.1-10.0 10.1-13.0 13.1-18.0 >18.0 Total N 0 0 2 5 9 40 72 4 0 0 0 0 132 NNE 0 0 1 5 19 64 51 1 0 0 0 0 141 NE 0 0 3 4 21 57 55 4 0 0 0 0 144 ENE 0 1 1 6 11 30 57 7 1 0 0 0 114 E 0 0 4 3 6 26 17 3 0 0 0 0 59 ESE 0 0 1 3 10 34 65 18 5 0 0 0 136 SE 0 0 1 2 7 24 43 9 3 0 0 0 89 SSE 0 0 0 3 8 10 81 40 1 0 0 0 143 S 0 2 3 5 8 32 78 24 0 0 0 0 152 SSW 0 1 1 2 9 40 82 12 0 0 0 0 147 SW 0 1 2 4 7 27 47 11 1 0 0 0 100 WSW 0 0 0 5 10 15 10 5 0 0 0 0 45 W 0 0 1 10 10 29 15 2 0 0 0 0 67 WNW 0 0 0 4 6 16 12 5 0 0 0 0 43 NW 0 0 0 8 4 19 29 9 0 0 0 0 69 NNW 0 2 0 7 7 31 64 16 0 0 0 0 127 TOTAL 0 7 20 76 152 494 778 170 11 0 0 0 1708 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 1708 TOTAL HOURS FOR THE PERIOD: 1708

Plant: River Bend Nuclear Station Year: 2023 Page 40 of 70 Annual Radioactive Effluent Release Report Stability Class E Period of Record: 01/01/2023 - 12/31/2023 Elevation: Primary Sensors - 150 Foot Wind Speed (meters/second) Wind Direction 0.22-0.50 0.51-0.75 0.76-1.0 1.1-1.5 1.6-2.0 2.1-3.0 3.1-5.0 5.1-7.0 7.1-10.0 10.1-13.0 13.1-18.0 >18.0 Total N 0 0 1 1 17 62 46 0 0 0 0 0 127 NNE 0 0 6 9 11 83 45 1 0 0 0 0 155 NE 0 1 2 7 17 62 67 0 0 0 0 0 156 ENE 0 0 2 9 21 54 49 4 0 0 0 0 139 E 0 0 5 12 23 41 41 10 0 0 0 0 132 ESE 0 1 2 8 10 63 175 21 0 0 0 0 280 SE 0 0 0 8 13 45 82 8 0 0 0 0 156 SSE 0 0 1 1 7 41 26 5 0 0 0 0 81 S 0 1 3 8 10 74 77 3 0 0 0 0 176 SSW 0 1 1 9 8 135 69 2 0 0 0 0 225 SW 0 0 1 10 19 89 21 1 0 0 0 0 141 WSW 0 0 0 6 16 59 9 0 0 0 0 0 90 W 0 0 1 14 12 18 4 0 0 0 0 0 49 WNW 0 0 1 11 10 20 14 0 0 0 0 0 56 NW 0 1 1 5 6 22 22 1 0 0 0 0 58 NNW 0 1 0 1 12 55 41 1 0 0 0 0 111 TOTAL 0 6 27 119 212 923 788 57 0 0 0 0 2132 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 2132 TOTAL HOURS FOR THE PERIOD: 2132

Plant: River Bend Nuclear Station Year: 2023 Page 41 of 70 Annual Radioactive Effluent Release Report Stability Class F Period of Record: 01/01/2023 - 12/31/2023 Elevation: Primary Sensors - 150 Foot Wind Speed (meters/second) Wind Direction 0.22-0.50 0.51-0.75 0.76-1.0 1.1-1.5 1.6-2.0 2.1-3.0 3.1-5.0 5.1-7.0 7.1-10.0 10.1-13.0 13.1-18.0 >18.0 Total N 0 0 1 6 3 19 14 0 0 0 0 0 43 NNE 0 0 1 3 12 33 14 0 0 0 0 0 63 NE 0 0 1 2 9 36 39 0 0 0 0 0 87 ENE 0 0 0 6 3 23 26 3 0 0 0 0 61 E 0 0 0 12 8 15 14 0 0 0 0 0 49 ESE 0 0 2 5 14 33 69 4 0 0 0 0 127 SE 0 0 1 6 11 35 31 0 0 0 0 0 84 SSE 0 0 2 7 6 17 6 0 0 0 0 0 38 S 0 0 2 6 11 25 8 0 0 0 0 0 52 SSW 0 0 1 5 12 30 3 0 0 0 0 0 51 SW 0 0 1 5 27 42 1 0 0 0 0 0 76 WSW 0 0 2 3 17 31 1 0 0 0 0 0 54 W 0 0 0 8 18 13 1 0 0 0 0 0 40 WNW 0 1 0 3 5 14 7 0 0 0 0 0 30 NW 0 1 2 1 4 18 9 0 0 0 0 0 35 NNW 0 0 0 0 2 16 4 1 0 0 0 0 23 TOTAL 0 2 16 78 162 400 247 8 0 0 0 0 913 NUMBER OF CALMS: 9 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 913 TOTAL HOURS FOR THE PERIOD: 913

Plant: River Bend Nuclear Station Year: 2023 Page 42 of 70 Annual Radioactive Effluent Release Report Stability Class G Period of Record: 01/01/2023 - 12/31/2023 Elevation: Primary Sensors - 150 Foot Wind Speed (meters/second) Wind Direction 0.22-0.50 0.51-0.75 0.76-1.0 1.1-1.5 1.6-2.0 2.1-3.0 3.1-5.0 5.1-7.0 7.1-10.0 10.1-13.0 13.1-18.0 >18.0 Total N 0 0 2 14 8 18 20 0 0 0 0 0 62 NNE 0 4 2 5 10 40 10 0 0 0 0 0 71 NE 0 1 1 3 5 41 15 0 0 0 0 0 66 ENE 0 2 3 8 6 23 19 0 0 0 0 0 61 E 0 0 1 10 20 31 6 0 0 0 0 0 68 ESE 0 0 2 5 12 46 13 0 0 0 0 0 78 SE 0 2 1 5 12 17 17 0 0 0 0 0 54 SSE 0 1 2 14 12 35 3 0 0 0 0 0 67 S 0 0 4 10 14 29 3 0 0 0 0 0 60 SSW 0 0 2 16 23 36 1 0 0 0 0 0 78 SW 0 0 3 9 15 46 4 0 0 0 0 0 77 WSW 1 3 5 11 17 27 1 0 0 0 0 0 65 W 0 0 5 12 17 31 3 0 0 0 0 0 68 WNW 0 1 3 9 9 44 9 0 0 0 0 0 75 NW 0 0 1 9 9 62 10 0 0 0 0 0 91 NNW 0 0 1 5 8 25 18 0 0 0 0 0 57 TOTAL 1 14 38 145 197 551 152 0 0 0 0 0 1098 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 1098 TOTAL HOURS FOR THE PERIOD: 1098

Plant: River Bend Nuclear Station Year: 2023 Page 43 of 70 Annual Radioactive Effluent Release Report 7.2 Stability Class Table 17, Classification of Atmospheric Stability Stability Condition Pasquill Categories Hours (Percentage) Extremely Unstable A 24 Moderately Stable B 3 Slightly Unstable C 3 Neutral D 20 Slightly Stable E 25 Moderately Stable F 11 Extremely Stable G 13 Table 18, Atmospheric Dispersion and Deposition Rates for the Maximum Individual Dose Calculations Analysis Location (meters) Ground Level Releases Mixed Mode Releases Gamma air dose (3) and Beta Air Dose 994 m WNW (Containment) CHI/Q - 421.0 CHI/Q - 33.1 Maximum Receptor (4) 994 m WNW CHI/Q - 421.0 CHI/Q - 33.1 Resident D/Q - 50.3 D/Q - 18.0 Garden Meat animal Immersion Milk animal (5) 7,000 m WNW CHI/Q - 3.58 D/Q - 0.38 CHI/Q -.870 D/Q -.223 Other on-site Receptors 115 m ENE CHI/Q - 5977.0 D/Q - 529.7 CHI/Q - 407.5 D/Q - 46.9 275 m N CHI/Q - 1644.0 D/Q - 345.6 CHI/Q - 169.1 D/Q - 68.4 2500 SW CHI/Q - 34.45 D/Q - 3.35 CHI/Q - 4.65 D/Q - 1.40 Notes: (1) All CHI/Q = 10-7 sec/m3 (2) All D/Q = 10-9 m-2 (3) Maximum offsite location (property boundary) with highest CHI/Q (unoccupied). (4) Maximum hypothetical occupied offsite location with highest CHI/Q and D/Q. (5) No milk animal within 5 miles radius, hypothetical location in worst sector. (6) Other onsite receptors (7) Revisions to X/Q and D/Q can be performed using NUREG/CR-2919, XOQDOQ, Computer Program for the Meteorological Evaluation of Routine Effluent Releases at Nuclear Power Stations

RBG-48276 Rev. 2023 Page 44 of 70 Annual Radioactive Effluent Release Report Page 1 of 27 Groundwater Monitoring Well Sampling Results Table 19, Gamma Isotopic Results Station ID Sample Date Units MN-54 CO-58 FE-59 CO-60 ZN-65 NB-95 ZR-95 I-131 CS-134 CS-137 BA-140 LA-140 MW-04 10/18/2023 pCi/L < 4.9E+00 < 5.1E+00 < 9.5E+00 < 4.8E+00 < 1.0E+01 < 5.4E+00 < 8.3E+00 < 1.4E+01 < 4.7E+00 < 5.0E+00 < 2.6E+01 < 9.0E+00 MW-05 10/18/2023 pCi/L < 3.5E+00 < 4.1E+00 < 9.4E+00 < 4.2E+00 < 8.7E+00 < 4.5E+00 < 6.6E+00 < 8.4E+00 < 4.7E+00 < 3.9E+00 < 2.2E+01 < 9.0E+00 MW-08 10/18/2023 pCi/L < 3.9E+00 < 4.8E+00 < 8.0E+00 < 4.6E+00 < 7.6E+00 < 4.3E+00 < 7.0E+00 < 1.0E+01 < 4.0E+00 < 3.8E+00 < 2.6E+01 < 8.5E+00 MW-100 1/25/2023 pCi/L < 7.0E+00 < 5.4E+00 < 1.8E+01 < 6.0E+00 < 1.5E+01 < 8.3E+00 < 1.2E+01 < 1.4E+01 < 7.3E+00 < 6.8E+00 < 3.3E+01 < 1.4E+01 MW-100 5/24/2023 pCi/L < 4.0E+00 < 5.8E+00 < 9.2E+00 < 4.8E+00 < 8.8E+00 < 6.4E+00 < 8.1E+00 < 1.4E+01 < 5.2E+00 < 5.2E+00 < 3.2E+01 < 7.5E+00 MW-100 8/15/2023 pCi/L < 2.4E+00 < 3.0E+00 < 5.9E+00 < 2.6E+00 < 4.6E+00 < 2.7E+00 < 5.0E+00 < 1.1E+01 < 2.9E+00 < 2.8E+00 < 2.2E+01 < 7.0E+00 MW-100 10/18/2023 pCi/L < 4.6E+00 < 5.3E+00 < 1.0E+01 < 4.6E+00 < 1.0E+01 < 4.5E+00 < 7.3E+00 < 1.3E+01 < 4.9E+00 < 4.3E+00 < 2.7E+01 < 7.4E+00 MW-103 10/18/2023 pCi/L < 3.0E+00 < 3.2E+00 < 7.0E+00 < 2.9E+00 < 6.0E+00 < 3.3E+00 < 5.4E+00 < 6.4E+00 < 3.1E+00 < 3.2E+00 < 1.6E+01 < 6.6E+00 MW-104 10/19/2023 pCi/L < 7.1E+00 < 7.3E+00 < 1.5E+01 < 5.3E+00 < 1.3E+01 < 7.9E+00 < 1.2E+01 < 1.4E+01 < 6.9E+00 < 6.5E+00 < 3.8E+01 < 1.3E+01 MW-106 5/24/2023 pCi/L < 7.5E+00 < 5.6E+00 < 1.5E+01 < 8.3E+00 < 1.6E+01 < 6.0E+00 < 9.5E+00 < 1.4E+01 < 6.4E+00 < 6.4E+00 < 3.7E+01 < 1.1E+01 MW-106 10/19/2023 pCi/L < 5.9E+00 < 6.3E+00 < 1.4E+01 < 5.8E+00 < 1.2E+01 < 8.4E+00 < 1.3E+01 < 1.3E+01 < 7.3E+00 < 8.2E+00 < 3.7E+01 < 1.4E+01 MW-107 10/19/2023 pCi/L < 3.3E+00 < 3.1E+00 < 7.1E+00 < 4.0E+00 < 5.8E+00 < 3.4E+00 < 5.5E+00 < 5.9E+00 < 3.4E+00 < 2.9E+00 < 1.6E+01 < 4.8E+00 MW-108 10/19/2023 pCi/L < 7.1E+00 < 5.7E+00 < 1.0E+01 < 5.9E+00 < 1.4E+01 < 7.3E+00 < 1.2E+01 < 1.4E+01 < 6.8E+00 < 6.2E+00 < 3.3E+01 < 1.3E+01 MW-110 1/24/2023 pCi/L < 4.5E+00 < 4.1E+00 < 1.2E+01 < 4.9E+00 < 8.1E+00 < 4.8E+00 < 8.6E+00 < 1.4E+01 < 4.6E+00 < 4.9E+00 < 3.7E+01 < 1.2E+01 MW-110 5/24/2023 pCi/L < 1.7E+00 < 1.8E+00 < 4.3E+00 < 1.9E+00 < 3.3E+00 < 1.8E+00 < 3.5E+00 < 1.4E+01 < 1.7E+00 < 1.7E+00 < 2.2E+01 < 7.4E+00 MW-110 8/15/2023 pCi/L < 1.8E+00 < 2.3E+00 < 4.7E+00 < 2.1E+00 < 4.1E+00 < 2.4E+00 < 4.3E+00 < 1.1E+01 < 2.0E+00 < 1.8E+00 < 2.6E+01 < 1.0E+01 MW-110 10/18/2023 pCi/L < 5.8E+00 < 6.8E+00 < 1.4E+01 < 6.9E+00 < 1.1E+01 < 6.9E+00 < 1.1E+01 < 1.2E+01 < 5.9E+00 < 5.9E+00 < 3.4E+01 < 1.1E+01

RBG-48276 Rev. 2023 Page 45 of 70 Annual Radioactive Effluent Release Report Page 2 of 27 Groundwater Monitoring Well Sampling Results Table 19, Gamma Isotopic Results Station ID Sample Date Units MN-54 CO-58 FE-59 CO-60 ZN-65 NB-95 ZR-95 I-131 CS-134 CS-137 BA-140 LA-140 MW-111 10/19/2023 pCi/L < 5.1E+00 < 5.6E+00 < 1.1E+01 < 6.4E+00 < 1.2E+01 < 5.9E+00 < 8.3E+00 < 1.4E+01 < 4.7E+00 < 5.6E+00 < 3.1E+01 < 1.3E+01 MW-112 1/24/2023 pCi/L < 1.9E+00 < 1.9E+00 < 4.7E+00 < 1.8E+00 < 4.0E+00 < 2.1E+00 < 3.5E+00 < 6.0E+00 < 2.0E+00 < 2.0E+00 < 1.4E+01 < 4.5E+00 MW-112 5/24/2023 pCi/L < 1.6E+00 < 1.8E+00 < 4.6E+00 < 1.7E+00 < 3.2E+00 < 1.9E+00 < 3.1E+00 < 1.4E+01 < 1.7E+00 < 1.6E+00 < 2.3E+01 < 8.0E+00 MW-112 8/16/2023 pCi/L < 1.8E+00 < 2.2E+00 < 5.2E+00 < 1.8E+00 < 3.6E+00 < 2.3E+00 < 3.9E+00 < 1.1E+01 < 2.0E+00 < 1.9E+00 < 2.7E+01 < 8.8E+00 MW-112 10/17/2023 pCi/L < 4.7E+00 < 4.7E+00 < 9.6E+00 < 6.9E+00 < 1.3E+01 < 5.9E+00 < 1.1E+01 < 1.3E+01 < 4.9E+00 < 4.7E+00 < 3.4E+01 < 1.4E+01 MW-112 10/17/2023 pCi/L < 5.4E+00 < 5.9E+00 < 1.5E+01 < 7.6E+00 < 1.3E+01 < 6.8E+00 < 9.6E+00 < 1.4E+01 < 7.0E+00 < 6.3E+00 < 3.5E+01 < 8.2E+00 MW-114 1/24/2023 pCi/L < 1.9E+00 < 2.1E+00 < 4.9E+00 < 2.0E+00 < 4.3E+00 < 2.2E+00 < 3.5E+00 < 7.4E+00 < 2.2E+00 < 2.1E+00 < 1.5E+01 < 4.7E+00 MW-114 5/24/2023 pCi/L < 7.4E-01 < 8.2E-01 < 1.8E+00 < 1.0E+00 < 1.6E+00 < 9.0E-01 < 1.5E+00 < 5.3E+00 < 7.1E-01 < 6.9E-01 < 8.5E+00 < 2.4E+00 MW-114 8/16/2023 pCi/L < 1.7E+00 < 2.1E+00 < 4.7E+00 < 1.8E+00 < 3.7E+00 < 2.2E+00 < 3.6E+00 < 1.2E+01 < 2.0E+00 < 1.7E+00 < 2.6E+01 < 8.6E+00 MW-114 10/17/2023 pCi/L < 6.4E+00 < 4.8E+00 < 1.2E+01 < 7.2E+00 < 1.2E+01 < 6.4E+00 < 1.1E+01 < 1.2E+01 < 6.8E+00 < 7.2E+00 < 4.0E+01 < 1.0E+01 MW-114 10/17/2023 pCi/L < 6.4E+00 < 3.6E+00 < 1.4E+01 < 6.8E+00 < 1.0E+01 < 6.5E+00 < 1.2E+01 < 1.4E+01 < 5.2E+00 < 5.8E+00 < 3.0E+01 < 8.1E+00 MW-116 1/24/2023 pCi/L < 4.0E+00 < 4.6E+00 < 8.7E+00 < 3.8E+00 < 9.6E+00 < 4.7E+00 < 9.2E+00 < 1.4E+01 < 5.0E+00 < 4.3E+00 < 3.1E+01 < 1.1E+01 MW-116 5/24/2023 pCi/L < 1.2E+00 < 1.5E+00 < 3.2E+00 < 1.7E+00 < 2.2E+00 < 1.4E+00 < 2.3E+00 < 1.0E+01 < 1.4E+00 < 1.2E+00 < 1.6E+01 < 6.2E+00 MW-116 8/16/2023 pCi/L < 1.9E+00 < 2.3E+00 < 5.6E+00 < 2.3E+00 < 4.1E+00 < 2.3E+00 < 4.2E+00 < 1.3E+01 < 2.1E+00 < 1.9E+00 < 2.8E+01 < 1.1E+01 MW-116 10/17/2023 pCi/L < 5.6E+00 < 6.6E+00 < 1.1E+01 < 7.9E+00 < 1.1E+01 < 4.4E+00 < 8.0E+00 < 1.2E+01 < 4.9E+00 < 5.9E+00 < 2.8E+01 < 1.1E+01 MW-118 1/24/2023 pCi/L < 3.6E+00 < 4.1E+00 < 7.4E+00 < 3.9E+00 < 9.4E+00 < 3.9E+00 < 6.3E+00 < 1.2E+01 < 4.1E+00 < 3.5E+00 < 3.0E+01 < 1.2E+01 MW-118 5/24/2023 pCi/L < 1.5E+00 < 1.8E+00 < 4.0E+00 < 1.8E+00 < 3.0E+00 < 1.9E+00 < 3.3E+00 < 1.4E+01 < 1.7E+00 < 1.6E+00 < 2.0E+01 < 7.5E+00

RBG-48276 Rev. 2023 Page 46 of 70 Annual Radioactive Effluent Release Report Page 3 of 27 Groundwater Monitoring Well Sampling Results Table 19, Gamma Isotopic Results Station ID Sample Date Units MN-54 CO-58 FE-59 CO-60 ZN-65 NB-95 ZR-95 I-131 CS-134 CS-137 BA-140 LA-140 MW-118 8/15/2023 pCi/L < 1.7E+00 < 2.1E+00 < 5.2E+00 < 1.8E+00 < 3.8E+00 < 2.2E+00 < 4.0E+00 < 1.3E+01 < 1.9E+00 < 1.9E+00 < 2.5E+01 < 9.2E+00 MW-118 8/15/2023 pCi/L < 1.4E+00 < 1.5E+00 < 3.4E+00 < 1.6E+00 < 2.7E+00 < 1.6E+00 < 2.8E+00 < 1.3E+01 < 1.4E+00 < 1.3E+00 < 1.8E+01 < 6.0E+00 MW-118 10/18/2023 pCi/L < 6.0E+00 < 7.3E+00 < 1.1E+01 < 7.2E+00 < 1.6E+01 < 8.3E+00 < 1.1E+01 < 1.2E+01 < 1.0E+01 < 7.6E+00 < 3.5E+01 < 6.8E+00 MW-120 5/24/2023 pCi/L < 5.6E+00 < 5.7E+00 < 1.2E+01 < 6.5E+00 < 1.1E+01 < 6.1E+00 < 1.0E+01 < 1.3E+01 < 5.6E+00 < 4.8E+00 < 3.3E+01 < 9.9E+00 MW-120 5/24/2023 pCi/L < 2.4E+00 < 2.6E+00 < 6.0E+00 < 2.7E+00 < 5.3E+00 < 2.5E+00 < 4.4E+00 < 7.6E+00 < 2.6E+00 < 2.5E+00 < 1.6E+01 < 6.6E+00 MW-120 10/19/2023 pCi/L < 4.2E+00 < 5.2E+00 < 9.6E+00 < 5.2E+00 < 8.3E+00 < 4.6E+00 < 7.4E+00 < 1.2E+01 < 4.7E+00 < 3.8E+00 < 2.7E+01 < 9.5E+00 MW-122R 5/24/2023 pCi/L < 5.4E+00 < 7.6E+00 < 1.3E+01 < 8.4E+00 < 9.9E+00 < 6.6E+00 < 1.2E+01 < 1.3E+01 < 5.9E+00 < 7.5E+00 < 3.5E+01 < 1.4E+01 MW-122R 10/19/2023 pCi/L < 4.0E+00 < 5.6E+00 < 1.1E+01 < 5.7E+00 < 7.9E+00 < 6.0E+00 < 9.2E+00 < 1.3E+01 < 6.5E+00 < 4.5E+00 < 2.7E+01 < 9.9E+00 MW-124 1/25/2023 pCi/L < 5.5E+00 < 5.6E+00 < 1.1E+01 < 6.3E+00 < 1.1E+01 < 4.8E+00 < 1.1E+01 < 1.4E+01 < 5.4E+00 < 5.4E+00 < 3.3E+01 < 1.4E+01 MW-124 5/23/2023 pCi/L < 1.6E+00 < 1.9E+00 < 4.5E+00 < 1.7E+00 < 3.3E+00 < 2.0E+00 < 3.3E+00 < 1.3E+01 < 1.7E+00 < 1.5E+00 < 2.2E+01 < 7.3E+00 MW-124 8/15/2023 pCi/L < 1.8E+00 < 2.0E+00 < 5.4E+00 < 2.0E+00 < 4.1E+00 < 2.3E+00 < 3.7E+00 < 1.2E+01 < 2.0E+00 < 1.7E+00 < 2.4E+01 < 9.1E+00 MW-124 8/15/2023 pCi/L < 1.9E+00 < 2.3E+00 < 5.6E+00 < 2.0E+00 < 4.1E+00 < 2.5E+00 < 4.4E+00 < 1.3E+01 < 2.1E+00 < 1.8E+00 < 2.7E+01 < 9.2E+00 MW-124 10/17/2023 pCi/L < 5.1E+00 < 4.5E+00 < 1.4E+01 < 7.3E+00 < 1.3E+01 < 6.1E+00 < 9.8E+00 < 1.2E+01 < 5.9E+00 < 5.2E+00 < 2.8E+01 < 9.2E+00 MW-125 1/25/2023 pCi/L < 4.2E+00 < 4.4E+00 < 1.1E+01 < 4.0E+00 < 9.2E+00 < 4.9E+00 < 7.5E+00 < 1.5E+01 < 5.0E+00 < 4.0E+00 < 3.3E+01 < 9.2E+00 MW-125 5/23/2023 pCi/L < 1.5E+00 < 1.7E+00 < 4.4E+00 < 1.7E+00 < 3.3E+00 < 1.9E+00 < 3.3E+00 < 1.3E+01 < 1.6E+00 < 1.6E+00 < 2.0E+01 < 7.6E+00 MW-125 8/15/2023 pCi/L < 1.9E+00 < 2.4E+00 < 5.4E+00 < 1.9E+00 < 4.2E+00 < 2.5E+00 < 4.1E+00 < 1.3E+01 < 2.2E+00 < 2.0E+00 < 2.9E+01 < 9.1E+00 MW-125 10/17/2023 pCi/L < 4.8E+00 < 5.3E+00 < 1.1E+01 < 5.2E+00 < 1.2E+01 < 5.0E+00 < 1.0E+01 < 1.1E+01 < 5.4E+00 < 5.6E+00 < 2.7E+01 < 1.4E+01

RBG-48276 Rev. 2023 Page 47 of 70 Annual Radioactive Effluent Release Report Page 4 of 27 Groundwater Monitoring Well Sampling Results Table 19, Gamma Isotopic Results Station ID Sample Date Units MN-54 CO-58 FE-59 CO-60 ZN-65 NB-95 ZR-95 I-131 CS-134 CS-137 BA-140 LA-140 MW-126 1/25/2023 pCi/L < 4.5E+00 < 4.4E+00 < 8.3E+00 < 3.9E+00 < 7.4E+00 < 4.6E+00 < 8.2E+00 < 1.2E+01 < 4.1E+00 < 4.6E+00 < 2.4E+01 < 1.2E+01 MW-126 5/24/2023 pCi/L < 1.3E+00 < 1.5E+00 < 3.7E+00 < 1.6E+00 < 2.7E+00 < 1.6E+00 < 2.8E+00 < 1.4E+01 < 1.5E+00 < 1.3E+00 < 2.0E+01 < 6.4E+00 MW-126 8/15/2023 pCi/L < 1.9E+00 < 2.3E+00 < 5.1E+00 < 2.1E+00 < 4.2E+00 < 2.3E+00 < 4.2E+00 < 1.3E+01 < 2.1E+00 < 2.0E+00 < 2.8E+01 < 8.8E+00 MW-126 10/17/2023 pCi/L < 5.1E+00 < 4.9E+00 < 1.4E+01 < 3.3E+00 < 1.0E+01 < 6.5E+00 < 9.5E+00 < 1.1E+01 < 6.1E+00 < 5.2E+00 < 2.8E+01 < 1.4E+01 MW-128 5/24/2023 pCi/L < 6.3E+00 < 8.4E+00 < 1.9E+01 < 7.5E+00 < 1.7E+01 < 8.9E+00 < 8.7E+00 < 1.4E+01 < 7.3E+00 < 5.2E+00 < 3.6E+01 < 1.4E+01 MW-128 5/24/2023 pCi/L < 7.6E+00 < 6.8E+00 < 1.3E+01 < 8.2E+00 < 1.5E+01 < 8.0E+00 < 1.1E+01 < 1.4E+01 < 7.4E+00 < 7.8E+00 < 3.5E+01 < 1.2E+01 MW-128 10/18/2023 pCi/L < 4.9E+00 < 4.4E+00 < 1.1E+01 < 6.7E+00 < 1.3E+01 < 6.3E+00 < 8.9E+00 < 1.2E+01 < 6.5E+00 < 5.1E+00 < 3.1E+01 < 9.5E+00 MW-130 5/24/2023 pCi/L < 2.7E+00 < 3.1E+00 < 6.2E+00 < 3.3E+00 < 5.3E+00 < 2.8E+00 < 4.7E+00 < 8.6E+00 < 3.3E+00 < 2.9E+00 < 1.9E+01 < 5.9E+00 MW-130 10/18/2023 pCi/L < 4.8E+00 < 5.0E+00 < 1.1E+01 < 5.0E+00 < 9.0E+00 < 6.0E+00 < 9.0E+00 < 1.4E+01 < 5.0E+00 < 5.7E+00 < 2.9E+01 < 9.8E+00 MW-130 10/18/2023 pCi/L < 6.6E+00 < 7.0E+00 < 1.2E+01 < 7.1E+00 < 1.2E+01 < 7.5E+00 < 1.3E+01 < 1.2E+01 < 5.8E+00 < 6.9E+00 < 3.0E+01 < 1.5E+01 MW-131 5/24/2023 pCi/L < 4.4E+00 < 5.9E+00 < 1.3E+01 < 5.2E+00 < 9.2E+00 < 6.1E+00 < 9.5E+00 < 1.4E+01 < 5.4E+00 < 6.1E+00 < 3.4E+01 < 1.4E+01 MW-131 10/18/2023 pCi/L < 5.4E+00 < 6.0E+00 < 1.4E+01 < 7.1E+00 < 9.9E+00 < 8.3E+00 < 1.1E+01 < 1.4E+01 < 7.0E+00 < 5.1E+00 < 3.7E+01 < 1.3E+01 MW-131 10/18/2023 pCi/L < 5.3E+00 < 5.6E+00 < 1.1E+01 < 7.0E+00 < 1.5E+01 < 6.1E+00 < 1.0E+01 < 1.4E+01 < 6.3E+00 < 6.5E+00 < 3.0E+01 < 7.9E+00 MW-132 5/25/2023 pCi/L < 6.2E+00 < 8.1E+00 < 1.4E+01 < 9.1E+00 < 1.2E+01 < 6.2E+00 < 1.2E+01 < 1.4E+01 < 8.3E+00 < 8.3E+00 < 3.9E+01 < 1.3E+01 MW-132 10/18/2023 pCi/L < 4.5E+00 < 4.2E+00 < 1.1E+01 < 4.8E+00 < 8.5E+00 < 4.7E+00 < 8.8E+00 < 1.5E+01 < 5.3E+00 < 4.6E+00 < 2.8E+01 < 9.3E+00 MW-134 5/25/2023 pCi/L < 6.8E+00 < 5.7E+00 < 1.2E+01 < 7.0E+00 < 1.6E+01 < 8.0E+00 < 8.8E+00 < 1.5E+01 < 9.0E+00 < 7.3E+00 < 3.4E+01 < 1.0E+01 MW-134 10/18/2023 pCi/L < 5.7E+00 < 6.5E+00 < 1.8E+01 < 5.7E+00 < 1.7E+01 < 9.8E+00 < 1.1E+01 < 1.1E+01 < 5.6E+00 < 8.0E+00 < 4.2E+01 < 1.0E+01

RBG-48276 Rev. 2023 Page 48 of 70 Annual Radioactive Effluent Release Report Page 5 of 27 Groundwater Monitoring Well Sampling Results Table 19, Gamma Isotopic Results Station ID Sample Date Units MN-54 CO-58 FE-59 CO-60 ZN-65 NB-95 ZR-95 I-131 CS-134 CS-137 BA-140 LA-140 MW-137 1/24/2023 pCi/L < 5.6E+00 < 5.0E+00 < 1.1E+01 < 4.9E+00 < 9.6E+00 < 4.2E+00 < 9.5E+00 < 1.5E+01 < 5.2E+00 < 4.4E+00 < 3.6E+01 < 1.1E+01 MW-137 5/24/2023 pCi/L < 1.1E+00 < 1.4E+00 < 2.8E+00 < 1.7E+00 < 2.4E+00 < 1.4E+00 < 2.4E+00 < 1.0E+01 < 1.3E+00 < 1.1E+00 < 1.7E+01 < 5.8E+00 MW-137 8/16/2023 pCi/L < 1.8E+00 < 2.2E+00 < 5.3E+00 < 2.1E+00 < 3.7E+00 < 2.3E+00 < 3.8E+00 < 1.2E+01 < 2.0E+00 < 1.7E+00 < 2.8E+01 < 9.3E+00 MW-137 10/17/2023 pCi/L < 4.4E+00 < 6.8E+00 < 1.4E+01 < 3.2E+00 < 1.1E+01 < 6.4E+00 < 9.6E+00 < 1.2E+01 < 6.4E+00 < 6.9E+00 < 3.7E+01 < 1.3E+01 MW-137 10/17/2023 pCi/L < 4.8E+00 < 5.6E+00 < 1.4E+01 < 6.7E+00 < 9.9E+00 < 6.6E+00 < 1.2E+01 < 1.5E+01 < 5.3E+00 < 5.9E+00 < 3.3E+01 < 1.1E+01 MW-139 1/24/2023 pCi/L < 5.9E+00 < 6.8E+00 < 1.6E+01 < 8.3E+00 < 1.2E+01 < 7.4E+00 < 1.4E+01 < 1.4E+01 < 6.3E+00 < 8.6E+00 < 4.1E+01 < 1.3E+01 MW-139 5/24/2023 pCi/L < 5.5E+00 < 5.3E+00 < 1.2E+01 < 5.4E+00 < 1.0E+01 < 5.0E+00 < 1.2E+01 < 1.3E+01 < 6.1E+00 < 6.0E+00 < 4.0E+01 < 1.3E+01 MW-139 8/16/2023 pCi/L < 4.4E+00 < 4.1E+00 < 1.1E+01 < 5.0E+00 < 9.7E+00 < 4.8E+00 < 6.9E+00 < 1.4E+01 < 4.4E+00 < 3.8E+00 < 3.2E+01 < 1.2E+01 MW-139 10/19/2023 pCi/L < 3.3E+00 < 3.2E+00 < 7.0E+00 < 3.0E+00 < 6.1E+00 < 3.3E+00 < 6.1E+00 < 7.3E+00 < 3.6E+00 < 3.3E+00 < 1.8E+01 < 6.1E+00 MW-14 10/17/2023 pCi/L < 3.1E+00 < 3.1E+00 < 6.3E+00 < 3.5E+00 < 6.2E+00 < 2.8E+00 < 5.1E+00 < 7.2E+00 < 3.3E+00 < 2.9E+00 < 1.6E+01 < 5.8E+00 MW-141 1/24/2023 pCi/L < 4.1E+00 < 4.3E+00 < 7.3E+00 < 4.8E+00 < 1.0E+01 < 4.5E+00 < 7.5E+00 < 1.4E+01 < 4.8E+00 < 4.6E+00 < 2.9E+01 < 5.8E+00 MW-141 5/24/2023 pCi/L < 1.4E+00 < 1.7E+00 < 4.1E+00 < 1.6E+00 < 2.7E+00 < 1.9E+00 < 3.0E+00 < 1.3E+01 < 1.6E+00 < 1.5E+00 < 2.0E+01 < 6.2E+00 MW-141 8/15/2023 pCi/L < 2.1E+00 < 2.4E+00 < 5.4E+00 < 2.2E+00 < 4.0E+00 < 2.4E+00 < 4.4E+00 < 1.3E+01 < 2.1E+00 < 2.1E+00 < 2.8E+01 < 9.0E+00 MW-141 10/17/2023 pCi/L < 6.0E+00 < 5.9E+00 < 1.5E+01 < 5.9E+00 < 1.4E+01 < 7.4E+00 < 1.2E+01 < 1.4E+01 < 7.4E+00 < 6.7E+00 < 3.3E+01 < 9.0E+00 MW-142 1/25/2023 pCi/L < 6.5E+00 < 7.8E+00 < 1.3E+01 < 5.4E+00 < 1.3E+01 < 8.0E+00 < 1.5E+01 < 1.3E+01 < 8.0E+00 < 6.7E+00 < 3.3E+01 < 1.4E+01 MW-142 5/23/2023 pCi/L < 1.5E+00 < 1.8E+00 < 4.2E+00 < 1.7E+00 < 3.1E+00 < 1.7E+00 < 3.2E+00 < 1.3E+01 < 1.5E+00 < 1.4E+00 < 1.9E+01 < 6.6E+00 MW-142 8/16/2023 pCi/L < 2.4E+00 < 2.5E+00 < 6.1E+00 < 2.5E+00 < 4.6E+00 < 2.6E+00 < 4.3E+00 < 8.1E+00 < 2.6E+00 < 2.4E+00 < 1.8E+01 < 6.1E+00

RBG-48276 Rev. 2023 Page 49 of 70 Annual Radioactive Effluent Release Report Page 6 of 27 Groundwater Monitoring Well Sampling Results Table 19, Gamma Isotopic Results Station ID Sample Date Units MN-54 CO-58 FE-59 CO-60 ZN-65 NB-95 ZR-95 I-131 CS-134 CS-137 BA-140 LA-140 MW-142 10/17/2023 pCi/L < 6.0E+00 < 5.4E+00 < 1.1E+01 < 6.4E+00 < 1.4E+01 < 6.0E+00 < 1.1E+01 < 1.3E+01 < 6.3E+00 < 5.2E+00 < 2.7E+01 < 1.4E+01 MW-144 1/25/2023 pCi/L < 4.8E+00 < 5.4E+00 < 1.1E+01 < 5.6E+00 < 9.8E+00 < 4.8E+00 < 7.6E+00 < 1.4E+01 < 4.6E+00 < 5.6E+00 < 3.2E+01 < 1.2E+01 MW-144 5/23/2023 pCi/L < 4.5E+00 < 4.6E+00 < 6.3E+00 < 3.9E+00 < 8.7E+00 < 5.0E+00 < 8.6E+00 < 1.3E+01 < 5.2E+00 < 4.8E+00 < 3.4E+01 < 1.1E+01 MW-144 8/16/2023 pCi/L < 2.0E+00 < 2.3E+00 < 5.6E+00 < 2.0E+00 < 3.8E+00 < 2.4E+00 < 4.2E+00 < 1.2E+01 < 2.0E+00 < 1.9E+00 < 2.7E+01 < 9.7E+00 MW-144 10/17/2023 pCi/L < 5.9E+00 < 6.6E+00 < 1.4E+01 < 7.7E+00 < 1.3E+01 < 6.2E+00 < 1.0E+01 < 1.3E+01 < 6.9E+00 < 6.8E+00 < 3.0E+01 < 1.3E+01 MW-146 1/25/2023 pCi/L < 3.8E+00 < 5.4E+00 < 8.3E+00 < 5.5E+00 < 1.0E+01 < 4.6E+00 < 8.8E+00 < 1.4E+01 < 4.6E+00 < 4.8E+00 < 3.0E+01 < 1.0E+01 MW-146 5/23/2023 pCi/L < 1.4E+00 < 1.6E+00 < 3.7E+00 < 1.6E+00 < 2.8E+00 < 1.8E+00 < 3.0E+00 < 1.3E+01 < 1.5E+00 < 1.4E+00 < 2.0E+01 < 6.3E+00 MW-146 8/16/2023 pCi/L < 1.8E+00 < 2.2E+00 < 5.0E+00 < 1.8E+00 < 3.8E+00 < 2.4E+00 < 4.1E+00 < 1.2E+01 < 2.0E+00 < 1.9E+00 < 3.0E+01 < 9.4E+00 MW-146 10/17/2023 pCi/L < 5.9E+00 < 5.7E+00 < 1.2E+01 < 5.8E+00 < 1.5E+01 < 8.2E+00 < 1.1E+01 < 1.4E+01 < 7.9E+00 < 5.4E+00 < 3.4E+01 < 1.2E+01 MW-147 1/25/2023 pCi/L < 4.4E+00 < 5.1E+00 < 1.2E+01 < 5.1E+00 < 9.7E+00 < 5.6E+00 < 8.8E+00 < 1.5E+01 < 5.1E+00 < 4.5E+00 < 3.2E+01 < 1.0E+01 MW-147 5/23/2023 pCi/L < 1.3E+00 < 1.7E+00 < 3.7E+00 < 1.9E+00 < 2.7E+00 < 1.7E+00 < 3.1E+00 < 1.4E+01 < 1.6E+00 < 1.5E+00 < 1.9E+01 < 5.7E+00 MW-147 8/16/2023 pCi/L < 2.0E+00 < 2.3E+00 < 5.3E+00 < 2.1E+00 < 4.3E+00 < 2.5E+00 < 4.3E+00 < 1.1E+01 < 2.2E+00 < 2.1E+00 < 3.0E+01 < 9.1E+00 MW-147 10/17/2023 pCi/L < 5.3E+00 < 6.9E+00 < 1.0E+01 < 5.0E+00 < 1.2E+01 < 6.3E+00 < 1.1E+01 < 1.5E+01 < 6.7E+00 < 5.7E+00 < 3.3E+01 < 9.6E+00 MW-148 1/25/2023 pCi/L < 6.1E+00 < 6.5E+00 < 1.6E+01 < 5.6E+00 < 1.5E+01 < 5.0E+00 < 1.2E+01 < 1.1E+01 < 6.9E+00 < 7.2E+00 < 3.3E+01 < 1.4E+01 MW-148 5/23/2023 pCi/L < 4.7E+00 < 4.3E+00 < 8.6E+00 < 5.0E+00 < 1.1E+01 < 4.7E+00 < 8.2E+00 < 1.3E+01 < 4.3E+00 < 3.9E+00 < 2.8E+01 < 9.6E+00 MW-148 8/16/2023 pCi/L < 3.9E+00 < 4.5E+00 < 9.3E+00 < 5.5E+00 < 7.6E+00 < 4.8E+00 < 6.7E+00 < 1.4E+01 < 4.9E+00 < 3.6E+00 < 3.1E+01 < 1.1E+01 MW-148 10/17/2023 pCi/L < 5.6E+00 < 6.0E+00 < 1.1E+01 < 7.1E+00 < 1.3E+01 < 6.4E+00 < 1.1E+01 < 1.4E+01 < 5.8E+00 < 5.4E+00 < 3.3E+01 < 1.2E+01

RBG-48276 Rev. 2023 Page 50 of 70 Annual Radioactive Effluent Release Report Page 7 of 27 Groundwater Monitoring Well Sampling Results Table 19, Gamma Isotopic Results Station ID Sample Date Units MN-54 CO-58 FE-59 CO-60 ZN-65 NB-95 ZR-95 I-131 CS-134 CS-137 BA-140 LA-140 MW-151 1/25/2023 pCi/L < 6.8E+00 < 6.5E+00 < 1.1E+01 < 8.1E+00 < 1.4E+01 < 7.7E+00 < 1.3E+01 < 1.4E+01 < 6.0E+00 < 7.1E+00 < 2.8E+01 < 1.1E+01 MW-151 3/29/2023 pCi/L < 5.1E+00 < 5.0E+00 < 9.8E+00 < 5.1E+00 < 1.1E+01 < 5.3E+00 < 8.2E+00 < 7.7E+00 < 5.1E+00 < 4.4E+00 < 2.1E+01 < 7.9E+00 MW-151 5/24/2023 pCi/L < 6.9E+00 < 6.8E+00 < 9.9E+00 < 5.8E+00 < 1.6E+01 < 8.2E+00 < 1.3E+01 < 1.5E+01 < 8.5E+00 < 7.2E+00 < 3.7E+01 < 1.4E+01 MW-151 5/24/2023 pCi/L < 5.8E+00 < 4.4E+00 < 1.2E+01 < 6.1E+00 < 1.2E+01 < 6.7E+00 < 1.0E+01 < 1.4E+01 < 6.4E+00 < 5.6E+00 < 3.5E+01 < 1.0E+01 MW-151 8/15/2023 pCi/L < 1.8E+00 < 2.2E+00 < 5.1E+00 < 2.0E+00 < 3.8E+00 < 2.3E+00 < 3.8E+00 < 1.2E+01 < 2.0E+00 < 1.9E+00 < 2.6E+01 < 9.1E+00 MW-151 10/18/2023 pCi/L < 2.9E+00 < 2.8E+00 < 5.8E+00 < 2.8E+00 < 5.2E+00 < 2.9E+00 < 4.9E+00 < 6.2E+00 < 3.1E+00 < 2.7E+00 < 1.5E+01 < 4.8E+00 MW-153 1/26/2023 pCi/L < 4.6E+00 < 5.5E+00 < 1.1E+01 < 5.1E+00 < 9.9E+00 < 5.8E+00 < 8.5E+00 < 1.5E+01 < 5.4E+00 < 5.3E+00 < 3.5E+01 < 1.1E+01 MW-153 5/23/2023 pCi/L < 1.8E+00 < 2.1E+00 < 4.7E+00 < 1.8E+00 < 3.6E+00 < 2.2E+00 < 3.6E+00 < 1.2E+01 < 2.0E+00 < 1.9E+00 < 2.0E+01 < 7.1E+00 MW-153 8/16/2023 pCi/L < 1.3E+00 < 1.5E+00 < 3.7E+00 < 1.7E+00 < 2.8E+00 < 1.5E+00 < 2.7E+00 < 1.3E+01 < 1.3E+00 < 1.2E+00 < 1.8E+01 < 6.3E+00 MW-153 10/18/2023 pCi/L < 5.7E+00 < 7.6E+00 < 1.5E+01 < 5.8E+00 < 1.0E+01 < 7.7E+00 < 1.2E+01 < 1.4E+01 < 7.0E+00 < 7.3E+00 < 4.0E+01 < 1.1E+01 MW-155 1/25/2023 pCi/L < 3.7E+00 < 4.3E+00 < 8.4E+00 < 4.2E+00 < 7.6E+00 < 4.1E+00 < 8.4E+00 < 1.2E+01 < 3.0E+00 < 3.9E+00 < 2.6E+01 < 1.1E+01 MW-155 5/24/2023 pCi/L < 1.7E+00 < 1.9E+00 < 5.0E+00 < 1.8E+00 < 3.4E+00 < 2.0E+00 < 3.3E+00 < 1.5E+01 < 1.9E+00 < 1.6E+00 < 2.3E+01 < 8.0E+00 MW-155 8/15/2023 pCi/L < 1.8E+00 < 2.0E+00 < 4.6E+00 < 1.7E+00 < 3.4E+00 < 2.1E+00 < 3.6E+00 < 1.1E+01 < 1.8E+00 < 1.8E+00 < 2.4E+01 < 7.9E+00 MW-155 10/17/2023 pCi/L < 6.2E+00 < 8.3E+00 < 1.2E+01 < 8.0E+00 < 1.2E+01 < 7.0E+00 < 1.4E+01 < 1.4E+01 < 7.6E+00 < 6.7E+00 < 3.6E+01 < 1.3E+01 MW-156 1/25/2023 pCi/L < 4.4E+00 < 4.4E+00 < 9.5E+00 < 4.3E+00 < 8.7E+00 < 4.6E+00 < 7.9E+00 < 1.4E+01 < 5.4E+00 < 4.3E+00 < 3.0E+01 < 9.5E+00 MW-156 5/24/2023 pCi/L < 1.3E+00 < 1.5E+00 < 3.4E+00 < 1.4E+00 < 2.6E+00 < 1.5E+00 < 2.7E+00 < 9.0E+00 < 1.5E+00 < 1.3E+00 < 1.5E+01 < 5.9E+00 MW-156 8/15/2023 pCi/L < 1.9E+00 < 2.2E+00 < 5.2E+00 < 2.0E+00 < 4.2E+00 < 2.5E+00 < 4.2E+00 < 1.1E+01 < 2.2E+00 < 1.9E+00 < 2.6E+01 < 1.0E+01

RBG-48276 Rev. 2023 Page 51 of 70 Annual Radioactive Effluent Release Report Page 8 of 27 Groundwater Monitoring Well Sampling Results Table 19, Gamma Isotopic Results Station ID Sample Date Units MN-54 CO-58 FE-59 CO-60 ZN-65 NB-95 ZR-95 I-131 CS-134 CS-137 BA-140 LA-140 MW-156 10/17/2023 pCi/L < 7.2E+00 < 5.7E+00 < 1.4E+01 < 8.8E+00 < 1.4E+01 < 7.0E+00 < 1.0E+01 < 1.3E+01 < 7.8E+00 < 6.9E+00 < 3.3E+01 < 1.1E+01 MW-157 1/25/2023 pCi/L < 4.2E+00 < 5.7E+00 < 1.0E+01 < 3.9E+00 < 1.1E+01 < 4.3E+00 < 8.8E+00 < 1.4E+01 < 5.3E+00 < 5.3E+00 < 3.2E+01 < 1.0E+01 MW-157 1/25/2023 pCi/L < 5.1E+00 < 4.7E+00 < 1.2E+01 < 3.8E+00 < 1.0E+01 < 6.8E+00 < 9.5E+00 < 1.3E+01 < 5.5E+00 < 5.0E+00 < 3.1E+01 < 1.2E+01 MW-157 5/24/2023 pCi/L < 1.4E+00 < 1.7E+00 < 3.7E+00 < 1.8E+00 < 2.9E+00 < 1.8E+00 < 3.1E+00 < 1.4E+01 < 1.6E+00 < 1.5E+00 < 2.0E+01 < 6.8E+00 MW-157 5/24/2023 pCi/L < 1.5E+00 < 1.8E+00 < 3.9E+00 < 2.0E+00 < 2.8E+00 < 1.7E+00 < 3.4E+00 < 1.4E+01 < 1.6E+00 < 1.7E+00 < 2.3E+01 < 6.2E+00 MW-157 8/15/2023 pCi/L < 1.6E+00 < 2.0E+00 < 5.0E+00 < 1.8E+00 < 3.4E+00 < 2.3E+00 < 3.6E+00 < 1.4E+01 < 1.7E+00 < 1.7E+00 < 2.4E+01 < 9.6E+00 MW-157 10/17/2023 pCi/L < 5.7E+00 < 5.5E+00 < 1.2E+01 < 5.6E+00 < 1.3E+01 < 5.2E+00 < 8.4E+00 < 1.1E+01 < 5.8E+00 < 5.9E+00 < 3.1E+01 < 1.1E+01 MW-158 1/25/2023 pCi/L < 4.7E+00 < 4.9E+00 < 1.1E+01 < 4.2E+00 < 8.1E+00 < 4.2E+00 < 8.5E+00 < 1.4E+01 < 4.6E+00 < 5.0E+00 < 3.8E+01 < 1.4E+01 MW-158 5/23/2023 pCi/L < 1.4E+00 < 1.8E+00 < 4.0E+00 < 1.6E+00 < 3.1E+00 < 1.8E+00 < 3.1E+00 < 1.3E+01 < 1.5E+00 < 1.5E+00 < 1.9E+01 < 6.6E+00 MW-158 8/16/2023 pCi/L < 1.6E+00 < 1.9E+00 < 4.3E+00 < 1.8E+00 < 3.2E+00 < 2.0E+00 < 3.6E+00 < 1.1E+01 < 1.8E+00 < 1.6E+00 < 2.3E+01 < 8.0E+00 MW-158 10/17/2023 pCi/L < 6.5E+00 < 5.9E+00 < 1.1E+01 < 7.3E+00 < 1.2E+01 < 7.0E+00 < 1.1E+01 < 1.4E+01 < 5.0E+00 < 6.3E+00 < 3.2E+01 < 1.1E+01 MW-159 1/25/2023 pCi/L < 2.0E+00 < 2.2E+00 < 4.7E+00 < 2.1E+00 < 4.3E+00 < 2.4E+00 < 4.1E+00 < 7.4E+00 < 2.3E+00 < 2.2E+00 < 1.6E+01 < 5.1E+00 MW-159 5/23/2023 pCi/L < 1.6E+00 < 1.8E+00 < 4.3E+00 < 2.0E+00 < 3.4E+00 < 2.0E+00 < 3.6E+00 < 1.2E+01 < 1.7E+00 < 1.7E+00 < 2.0E+01 < 6.6E+00 MW-159 8/16/2023 pCi/L < 1.6E+00 < 2.0E+00 < 5.1E+00 < 1.9E+00 < 3.7E+00 < 2.1E+00 < 3.6E+00 < 1.0E+01 < 1.8E+00 < 1.7E+00 < 2.3E+01 < 8.8E+00 MW-159 10/17/2023 pCi/L < 5.5E+00 < 6.8E+00 < 1.3E+01 < 4.2E+00 < 1.2E+01 < 8.6E+00 < 9.2E+00 < 1.4E+01 < 5.9E+00 < 6.3E+00 < 3.7E+01 < 1.2E+01 MW-161 1/24/2023 pCi/L < 3.2E+00 < 4.0E+00 < 7.1E+00 < 3.9E+00 < 6.9E+00 < 4.5E+00 < 7.3E+00 < 1.2E+01 < 4.0E+00 < 3.7E+00 < 2.8E+01 < 7.7E+00 MW-161 5/23/2023 pCi/L < 1.8E+00 < 2.0E+00 < 4.7E+00 < 2.1E+00 < 3.4E+00 < 2.1E+00 < 3.5E+00 < 1.5E+01 < 2.0E+00 < 1.9E+00 < 2.2E+01 < 7.0E+00

RBG-48276 Rev. 2023 Page 52 of 70 Annual Radioactive Effluent Release Report Page 9 of 27 Groundwater Monitoring Well Sampling Results Table 19, Gamma Isotopic Results Station ID Sample Date Units MN-54 CO-58 FE-59 CO-60 ZN-65 NB-95 ZR-95 I-131 CS-134 CS-137 BA-140 LA-140 MW-161 8/16/2023 pCi/L < 1.9E+00 < 2.4E+00 < 6.0E+00 < 2.1E+00 < 4.0E+00 < 2.7E+00 < 4.4E+00 < 1.2E+01 < 2.1E+00 < 2.0E+00 < 2.9E+01 < 1.0E+01 MW-161 10/18/2023 pCi/L < 6.4E+00 < 7.3E+00 < 1.4E+01 < 7.3E+00 < 1.5E+01 < 8.5E+00 < 8.8E+00 < 1.4E+01 < 7.7E+00 < 5.6E+00 < 3.4E+01 < 1.2E+01 MW-162 1/25/2023 pCi/L < 5.9E+00 < 4.1E+00 < 1.3E+01 < 6.6E+00 < 1.1E+01 < 5.2E+00 < 8.7E+00 < 1.4E+01 < 5.5E+00 < 5.9E+00 < 3.3E+01 < 1.3E+01 MW-162 5/23/2023 pCi/L < 5.8E+00 < 6.7E+00 < 1.5E+01 < 5.7E+00 < 1.5E+01 < 6.4E+00 < 8.2E+00 < 1.3E+01 < 6.9E+00 < 7.0E+00 < 3.0E+01 < 1.3E+01 MW-162 8/16/2023 pCi/L < 2.5E+00 < 3.9E+00 < 9.1E+00 < 4.0E+00 < 8.4E+00 < 4.2E+00 < 7.0E+00 < 1.2E+01 < 4.1E+00 < 3.3E+00 < 2.6E+01 < 7.8E+00 MW-162 10/17/2023 pCi/L < 5.9E+00 < 5.9E+00 < 1.1E+01 < 7.2E+00 < 9.3E+00 < 6.3E+00 < 9.7E+00 < 1.2E+01 < 6.4E+00 < 6.7E+00 < 3.3E+01 < 1.4E+01 MW-164 1/25/2023 pCi/L < 7.2E+00 < 5.5E+00 < 1.3E+01 < 7.6E+00 < 1.1E+01 < 6.3E+00 < 1.1E+01 < 1.4E+01 < 6.8E+00 < 7.3E+00 < 3.4E+01 < 1.3E+01 MW-164 5/24/2023 pCi/L < 6.1E+00 < 7.2E+00 < 1.4E+01 < 4.9E+00 < 1.3E+01 < 6.1E+00 < 8.6E+00 < 1.2E+01 < 7.8E+00 < 5.5E+00 < 4.3E+01 < 1.3E+01 MW-164 8/15/2023 pCi/L < 3.8E+00 < 4.9E+00 < 9.9E+00 < 4.2E+00 < 1.1E+01 < 4.5E+00 < 9.3E+00 < 1.5E+01 < 4.8E+00 < 4.2E+00 < 3.7E+01 < 1.1E+01 MW-164 8/15/2023 pCi/L < 4.1E+00 < 4.5E+00 < 9.4E+00 < 4.6E+00 < 9.3E+00 < 5.5E+00 < 6.8E+00 < 1.5E+01 < 4.5E+00 < 4.6E+00 < 3.4E+01 < 1.0E+01 MW-164 10/18/2023 pCi/L < 4.8E+00 < 4.5E+00 < 1.1E+01 < 5.5E+00 < 9.9E+00 < 5.8E+00 < 9.1E+00 < 1.4E+01 < 6.1E+00 < 6.7E+00 < 3.2E+01 < 1.1E+01 MW-165 1/25/2023 pCi/L < 7.7E+00 < 6.0E+00 < 1.0E+01 < 6.4E+00 < 1.1E+01 < 6.8E+00 < 1.1E+01 < 1.4E+01 < 7.2E+00 < 6.4E+00 < 3.5E+01 < 8.1E+00 MW-165 5/24/2023 pCi/L < 5.7E+00 < 5.5E+00 < 1.0E+01 < 4.4E+00 < 1.2E+01 < 5.3E+00 < 1.4E+01 < 1.3E+01 < 4.7E+00 < 7.2E+00 < 3.5E+01 < 1.5E+01 MW-165 8/15/2023 pCi/L < 2.6E+00 < 2.6E+00 < 6.3E+00 < 2.7E+00 < 5.3E+00 < 2.9E+00 < 4.8E+00 < 1.1E+01 < 2.8E+00 < 2.7E+00 < 2.1E+01 < 6.9E+00 MW-165 8/15/2023 pCi/L < 2.4E+00 < 2.6E+00 < 6.7E+00 < 3.4E+00 < 5.2E+00 < 2.8E+00 < 5.2E+00 < 9.9E+00 < 3.0E+00 < 2.7E+00 < 1.9E+01 < 7.4E+00 MW-165 10/18/2023 pCi/L < 6.4E+00 < 6.4E+00 < 1.1E+01 < 6.9E+00 < 1.1E+01 < 6.4E+00 < 1.2E+01 < 1.2E+01 < 5.5E+00 < 5.0E+00 < 3.7E+01 < 1.3E+01 MW-167 5/24/2023 pCi/L < 6.1E+00 < 5.4E+00 < 9.5E+00 < 6.4E+00 < 8.6E+00 < 5.4E+00 < 8.4E+00 < 1.3E+01 < 5.3E+00 < 6.2E+00 < 3.0E+01 < 1.3E+01

RBG-48276 Rev. 2023 Page 53 of 70 Annual Radioactive Effluent Release Report Page 10 of 27 Groundwater Monitoring Well Sampling Results Table 19, Gamma Isotopic Results Station ID Sample Date Units MN-54 CO-58 FE-59 CO-60 ZN-65 NB-95 ZR-95 I-131 CS-134 CS-137 BA-140 LA-140 MW-167 10/18/2023 pCi/L < 4.6E+00 < 6.2E+00 < 1.2E+01 < 6.0E+00 < 9.9E+00 < 5.6E+00 < 8.9E+00 < 1.3E+01 < 5.9E+00 < 5.5E+00 < 3.2E+01 < 9.8E+00 MW-167 10/18/2023 pCi/L < 5.1E+00 < 5.7E+00 < 1.3E+01 < 6.8E+00 < 1.1E+01 < 7.6E+00 < 1.2E+01 < 1.4E+01 < 6.3E+00 < 6.3E+00 < 3.3E+01 < 1.2E+01 MW-169 5/25/2023 pCi/L < 6.3E+00 < 7.1E+00 < 1.4E+01 < 6.8E+00 < 1.4E+01 < 7.0E+00 < 1.2E+01 < 1.5E+01 < 6.8E+00 < 7.5E+00 < 3.6E+01 < 9.2E+00 MW-169 10/18/2023 pCi/L < 5.6E+00 < 6.7E+00 < 1.3E+01 < 5.2E+00 < 1.0E+01 < 8.1E+00 < 1.3E+01 < 1.4E+01 < 7.1E+00 < 5.9E+00 < 3.4E+01 < 9.4E+00 MW-170 1/25/2023 pCi/L < 5.8E+00 < 6.3E+00 < 1.3E+01 < 4.9E+00 < 1.4E+01 < 6.5E+00 < 8.8E+00 < 1.4E+01 < 7.8E+00 < 6.7E+00 < 4.1E+01 < 1.1E+01 MW-170 5/24/2023 pCi/L < 7.4E+00 < 5.9E+00 < 1.4E+01 < 6.7E+00 < 1.2E+01 < 5.8E+00 < 9.1E+00 < 1.5E+01 < 7.1E+00 < 5.6E+00 < 3.4E+01 < 1.0E+01 MW-170 8/16/2023 pCi/L < 4.6E+00 < 4.5E+00 < 1.1E+01 < 5.3E+00 < 1.1E+01 < 5.3E+00 < 7.5E+00 < 1.5E+01 < 5.4E+00 < 4.4E+00 < 3.5E+01 < 1.2E+01 MW-170 10/19/2023 pCi/L < 5.2E+00 < 5.2E+00 < 1.3E+01 < 5.9E+00 < 1.2E+01 < 5.6E+00 < 1.1E+01 < 1.2E+01 < 6.6E+00 < 6.2E+00 < 3.3E+01 < 1.1E+01 MW-172 10/17/2023 pCi/L < 5.7E+00 < 5.7E+00 < 1.3E+01 < 7.7E+00 < 1.1E+01 < 6.9E+00 < 1.2E+01 < 1.4E+01 < 6.1E+00 < 5.7E+00 < 3.3E+01 < 1.2E+01 MW-174 10/17/2023 pCi/L < 3.3E+00 < 3.3E+00 < 7.1E+00 < 4.3E+00 < 6.9E+00 < 3.6E+00 < 5.7E+00 < 7.6E+00 < 3.4E+00 < 2.8E+00 < 2.0E+01 < 5.6E+00 MW-178 1/25/2023 pCi/L < 4.7E+00 < 3.9E+00 < 1.0E+01 < 4.3E+00 < 8.0E+00 < 4.7E+00 < 9.4E+00 < 1.4E+01 < 5.3E+00 < 5.0E+00 < 2.7E+01 < 8.2E+00 MW-178 5/24/2023 pCi/L < 1.9E+00 < 2.3E+00 < 5.1E+00 < 2.2E+00 < 3.9E+00 < 2.3E+00 < 4.0E+00 < 1.4E+01 < 2.2E+00 < 1.9E+00 < 2.3E+01 < 8.8E+00 MW-178 5/24/2023 pCi/L < 1.8E+00 < 2.2E+00 < 4.6E+00 < 2.2E+00 < 3.7E+00 < 2.2E+00 < 3.9E+00 < 1.5E+01 < 2.0E+00 < 2.1E+00 < 2.3E+01 < 7.2E+00 MW-178 8/15/2023 pCi/L < 1.3E+00 < 1.5E+00 < 3.4E+00 < 1.6E+00 < 2.7E+00 < 1.6E+00 < 2.5E+00 < 1.3E+01 < 1.3E+00 < 1.2E+00 < 1.8E+01 < 6.4E+00 MW-178 10/18/2023 pCi/L < 6.7E+00 < 6.7E+00 < 1.4E+01 < 7.0E+00 < 1.7E+01 < 7.0E+00 < 1.3E+01 < 1.3E+01 < 8.0E+00 < 7.8E+00 < 3.5E+01 < 1.2E+01 MW-179 1/25/2023 pCi/L < 4.9E+00 < 5.2E+00 < 1.1E+01 < 4.7E+00 < 9.6E+00 < 4.9E+00 < 8.5E+00 < 1.4E+01 < 5.2E+00 < 4.9E+00 < 3.1E+01 < 1.1E+01 MW-179 5/24/2023 pCi/L < 1.4E+00 < 1.6E+00 < 3.8E+00 < 1.6E+00 < 3.0E+00 < 1.7E+00 < 2.9E+00 < 1.1E+01 < 1.5E+00 < 1.5E+00 < 1.8E+01 < 5.6E+00

RBG-48276 Rev. 2023 Page 54 of 70 Annual Radioactive Effluent Release Report Page 11 of 27 Groundwater Monitoring Well Sampling Results Table 19, Gamma Isotopic Results Station ID Sample Date Units MN-54 CO-58 FE-59 CO-60 ZN-65 NB-95 ZR-95 I-131 CS-134 CS-137 BA-140 LA-140 MW-179 8/15/2023 pCi/L < 1.8E+00 < 2.2E+00 < 5.2E+00 < 1.9E+00 < 3.7E+00 < 2.2E+00 < 3.8E+00 < 1.2E+01 < 2.0E+00 < 1.8E+00 < 2.7E+01 < 8.8E+00 MW-179 10/18/2023 pCi/L < 5.9E+00 < 6.4E+00 < 1.4E+01 < 6.8E+00 < 1.3E+01 < 6.2E+00 < 1.0E+01 < 1.3E+01 < 7.1E+00 < 5.5E+00 < 3.5E+01 < 1.1E+01 MW-179 10/18/2023 pCi/L < 5.6E+00 < 7.0E+00 < 1.1E+01 < 8.6E+00 < 1.0E+01 < 7.6E+00 < 1.2E+01 < 1.4E+01 < 8.2E+00 < 7.6E+00 < 3.5E+01 < 1.3E+01 MW-18 10/18/2023 pCi/L < 2.8E+00 < 3.1E+00 < 6.4E+00 < 3.2E+00 < 6.0E+00 < 3.2E+00 < 5.1E+00 < 7.1E+00 < 3.1E+00 < 3.0E+00 < 1.7E+01 < 5.7E+00 MW-180 5/24/2023 pCi/L < 5.1E+00 < 5.1E+00 < 1.1E+01 < 6.2E+00 < 9.6E+00 < 5.4E+00 < 8.8E+00 < 1.5E+01 < 5.2E+00 < 4.7E+00 < 3.3E+01 < 1.0E+01 MW-180 10/19/2023 pCi/L < 6.0E+00 < 5.5E+00 < 1.3E+01 < 6.4E+00 < 1.1E+01 < 4.8E+00 < 1.1E+01 < 1.4E+01 < 6.2E+00 < 5.7E+00 < 3.5E+01 < 9.2E+00 MW-182 1/24/2023 pCi/L < 5.5E+00 < 5.9E+00 < 1.3E+01 < 5.0E+00 < 8.8E+00 < 5.0E+00 < 1.2E+01 < 1.5E+01 < 6.2E+00 < 5.6E+00 < 2.8E+01 < 1.1E+01 MW-182 5/24/2023 pCi/L < 4.8E+00 < 6.6E+00 < 1.2E+01 < 6.2E+00 < 7.2E+00 < 5.8E+00 < 1.3E+01 < 1.5E+01 < 8.1E+00 < 7.1E+00 < 3.6E+01 < 1.3E+01 MW-182 5/24/2023 pCi/L < 5.4E+00 < 6.0E+00 < 1.1E+01 < 4.8E+00 < 8.9E+00 < 5.5E+00 < 9.3E+00 < 1.4E+01 < 4.3E+00 < 4.4E+00 < 3.1E+01 < 1.4E+01 MW-182 8/16/2023 pCi/L < 4.0E+00 < 3.6E+00 < 9.2E+00 < 3.9E+00 < 7.2E+00 < 4.2E+00 < 8.1E+00 < 1.4E+01 < 4.1E+00 < 3.7E+00 < 3.1E+01 < 7.7E+00 MW-182 10/19/2023 pCi/L < 5.5E+00 < 5.7E+00 < 1.6E+01 < 5.5E+00 < 9.9E+00 < 6.9E+00 < 1.3E+01 < 1.5E+01 < 5.4E+00 < 6.8E+00 < 1.9E+01 < 9.7E+00 MW-185 1/25/2023 pCi/L < 6.7E+00 < 5.9E+00 < 1.3E+01 < 5.7E+00 < 1.1E+01 < 6.7E+00 < 1.1E+01 < 1.5E+01 < 5.9E+00 < 6.2E+00 < 3.2E+01 < 9.7E+00 MW-185 1/25/2023 pCi/L < 6.3E+00 < 8.1E+00 < 1.4E+01 < 2.8E+00 < 9.7E+00 < 8.2E+00 < 1.2E+01 < 1.5E+01 < 8.1E+00 < 6.5E+00 < 3.4E+01 < 1.2E+01 MW-185 5/24/2023 pCi/L < 6.2E+00 < 6.8E+00 < 1.8E+01 < 7.9E+00 < 1.1E+01 < 5.5E+00 < 1.0E+01 < 1.4E+01 < 6.6E+00 < 6.8E+00 < 4.6E+01 < 1.2E+01 MW-185 8/15/2023 pCi/L < 3.7E+00 < 3.9E+00 < 8.7E+00 < 4.3E+00 < 6.4E+00 < 3.6E+00 < 6.9E+00 < 1.4E+01 < 4.0E+00 < 3.6E+00 < 2.8E+01 < 9.3E+00 MW-185 10/17/2023 pCi/L < 5.9E+00 < 6.2E+00 < 1.3E+01 < 8.3E+00 < 1.5E+01 < 7.4E+00 < 9.6E+00 < 1.4E+01 < 6.6E+00 < 6.7E+00 < 3.9E+01 < 8.9E+00 MW-186 1/25/2023 pCi/L < 6.1E+00 < 7.3E+00 < 1.4E+01 < 6.0E+00 < 1.4E+01 < 8.8E+00 < 1.4E+01 < 1.4E+01 < 8.1E+00 < 9.4E+00 < 3.7E+01 < 1.3E+01

RBG-48276 Rev. 2023 Page 55 of 70 Annual Radioactive Effluent Release Report Page 12 of 27 Groundwater Monitoring Well Sampling Results Table 19, Gamma Isotopic Results Station ID Sample Date Units MN-54 CO-58 FE-59 CO-60 ZN-65 NB-95 ZR-95 I-131 CS-134 CS-137 BA-140 LA-140 MW-186 5/24/2023 pCi/L < 3.4E+00 < 8.4E+00 < 1.4E+01 < 8.2E+00 < 1.3E+01 < 9.4E+00 < 1.3E+01 < 1.5E+01 < 5.1E+00 < 9.1E+00 < 3.7E+01 < 1.4E+01 MW-186 8/15/2023 pCi/L < 2.4E+00 < 2.6E+00 < 6.1E+00 < 2.7E+00 < 4.7E+00 < 3.1E+00 < 5.3E+00 < 9.5E+00 < 2.9E+00 < 2.8E+00 < 1.9E+01 < 6.6E+00 MW-186 10/18/2023 pCi/L < 5.3E+00 < 5.9E+00 < 1.3E+01 < 4.6E+00 < 1.0E+01 < 7.6E+00 < 1.1E+01 < 1.3E+01 < 6.5E+00 < 5.5E+00 < 3.6E+01 < 1.0E+01 MW-187 1/25/2023 pCi/L < 5.4E+00 < 7.1E+00 < 1.2E+01 < 5.8E+00 < 1.5E+01 < 7.5E+00 < 1.4E+01 < 1.4E+01 < 8.0E+00 < 7.7E+00 < 2.9E+01 < 1.1E+01 MW-187 1/25/2023 pCi/L < 5.4E+00 < 5.1E+00 < 9.8E+00 < 5.0E+00 < 9.1E+00 < 5.6E+00 < 8.0E+00 < 1.4E+01 < 5.2E+00 < 4.9E+00 < 3.4E+01 < 1.2E+01 MW-187 5/24/2023 pCi/L < 5.2E+00 < 5.5E+00 < 1.1E+01 < 4.9E+00 < 1.0E+01 < 5.9E+00 < 9.7E+00 < 1.5E+01 < 5.6E+00 < 4.4E+00 < 3.6E+01 < 9.5E+00 MW-187 8/15/2023 pCi/L < 3.4E+00 < 3.5E+00 < 7.9E+00 < 4.5E+00 < 7.6E+00 < 3.8E+00 < 6.7E+00 < 1.4E+01 < 4.5E+00 < 3.5E+00 < 2.9E+01 < 9.2E+00 MW-187 10/18/2023 pCi/L < 4.9E+00 < 5.1E+00 < 9.8E+00 < 3.7E+00 < 1.1E+01 < 4.8E+00 < 8.8E+00 < 1.2E+01 < 5.4E+00 < 5.2E+00 < 2.8E+01 < 1.3E+01 MW-188 1/25/2023 pCi/L < 5.3E+00 < 6.9E+00 < 1.4E+01 < 6.4E+00 < 9.9E+00 < 6.7E+00 < 1.5E+01 < 1.3E+01 < 7.1E+00 < 4.6E+00 < 3.5E+01 < 1.4E+01 MW-188 5/23/2023 pCi/L < 3.3E+00 < 4.4E+00 < 9.4E+00 < 4.4E+00 < 9.3E+00 < 4.7E+00 < 8.7E+00 < 1.2E+01 < 4.1E+00 < 4.4E+00 < 3.0E+01 < 8.5E+00 MW-188 8/15/2023 pCi/L < 4.8E+00 < 4.6E+00 < 1.2E+01 < 6.0E+00 < 7.4E+00 < 5.0E+00 < 9.2E+00 < 1.4E+01 < 4.5E+00 < 4.5E+00 < 3.2E+01 < 1.4E+01 MW-188 8/15/2023 pCi/L < 2.2E+00 < 2.6E+00 < 5.9E+00 < 2.8E+00 < 4.7E+00 < 2.6E+00 < 4.4E+00 < 8.4E+00 < 2.5E+00 < 2.5E+00 < 1.9E+01 < 6.4E+00 MW-188 10/17/2023 pCi/L < 3.3E+00 < 3.4E+00 < 6.5E+00 < 3.7E+00 < 7.6E+00 < 3.5E+00 < 6.5E+00 < 8.3E+00 < 3.7E+00 < 3.7E+00 < 1.9E+01 < 7.0E+00 MW-201 5/24/2023 pCi/L < 2.7E+00 < 2.7E+00 < 6.3E+00 < 3.0E+00 < 5.6E+00 < 2.9E+00 < 5.1E+00 < 8.4E+00 < 3.0E+00 < 2.8E+00 < 1.9E+01 < 6.4E+00 MW-201 10/18/2023 pCi/L < 5.4E+00 < 5.5E+00 < 1.2E+01 < 3.0E+00 < 9.3E+00 < 4.6E+00 < 1.1E+01 < 1.2E+01 < 5.6E+00 < 5.6E+00 < 3.0E+01 < 1.4E+01 MW-205 5/23/2023 pCi/L < 3.9E+00 < 4.6E+00 < 9.0E+00 < 5.4E+00 < 8.8E+00 < 4.1E+00 < 9.1E+00 < 1.1E+01 < 4.7E+00 < 4.6E+00 < 2.8E+01 < 9.2E+00 MW-205 10/18/2023 pCi/L < 3.1E+00 < 2.8E+00 < 6.3E+00 < 3.5E+00 < 6.0E+00 < 2.9E+00 < 5.1E+00 < 5.9E+00 < 3.3E+00 < 3.4E+00 < 1.5E+01 < 4.9E+00

RBG-48276 Rev. 2023 Page 56 of 70 Annual Radioactive Effluent Release Report Page 13 of 27 Groundwater Monitoring Well Sampling Results Table 19, Gamma Isotopic Results Station ID Sample Date Units MN-54 CO-58 FE-59 CO-60 ZN-65 NB-95 ZR-95 I-131 CS-134 CS-137 BA-140 LA-140 MW-207 5/24/2023 pCi/L < 7.8E+00 < 7.8E+00 < 1.3E+01 < 8.6E+00 < 1.5E+01 < 6.2E+00 < 1.2E+01 < 1.3E+01 < 8.0E+00 < 8.2E+00 < 3.5E+01 < 1.1E+01 MW-207 10/18/2023 pCi/L < 2.8E+00 < 3.2E+00 < 6.2E+00 < 3.0E+00 < 6.7E+00 < 2.8E+00 < 5.6E+00 < 6.5E+00 < 3.2E+00 < 3.1E+00 < 1.6E+01 < 6.7E+00 MW-207 10/18/2023 pCi/L < 5.2E+00 < 5.8E+00 < 1.7E+01 < 7.5E+00 < 1.3E+01 < 6.3E+00 < 1.0E+01 < 1.3E+01 < 6.3E+00 < 4.8E+00 < 4.0E+01 < 1.4E+01 MW-209 1/26/2023 pCi/L < 4.1E+00 < 6.1E+00 < 1.3E+01 < 6.0E+00 < 1.1E+01 < 5.5E+00 < 1.2E+01 < 1.4E+01 < 5.7E+00 < 5.3E+00 < 3.6E+01 < 9.1E+00 MW-209 5/24/2023 pCi/L < 6.9E+00 < 7.1E+00 < 1.6E+01 < 4.7E+00 < 9.0E+00 < 6.6E+00 < 1.3E+01 < 1.3E+01 < 7.3E+00 < 6.4E+00 < 3.5E+01 < 7.6E+00 MW-209 8/16/2023 pCi/L < 3.9E+00 < 5.6E+00 < 1.2E+01 < 5.1E+00 < 1.0E+01 < 4.9E+00 < 9.8E+00 < 1.4E+01 < 5.4E+00 < 3.5E+00 < 3.3E+01 < 1.2E+01 MW-209 10/19/2023 pCi/L < 7.5E+00 < 5.9E+00 < 1.5E+01 < 7.8E+00 < 1.3E+01 < 7.3E+00 < 1.2E+01 < 1.4E+01 < 8.6E+00 < 8.9E+00 < 4.7E+01 < 1.3E+01 MW-211 1/25/2023 pCi/L < 2.1E+00 < 2.3E+00 < 5.2E+00 < 2.2E+00 < 4.6E+00 < 2.4E+00 < 4.0E+00 < 7.0E+00 < 2.5E+00 < 2.4E+00 < 1.5E+01 < 5.3E+00 MW-211 1/25/2023 pCi/L < 1.8E+00 < 2.1E+00 < 4.6E+00 < 2.3E+00 < 4.0E+00 < 2.4E+00 < 3.5E+00 < 6.1E+00 < 2.2E+00 < 2.0E+00 < 1.4E+01 < 5.1E+00 MW-211 5/24/2023 pCi/L < 1.2E+00 < 1.5E+00 < 3.5E+00 < 1.4E+00 < 2.6E+00 < 1.6E+00 < 2.7E+00 < 9.3E+00 < 1.4E+00 < 1.4E+00 < 1.6E+01 < 5.5E+00 MW-211 8/15/2023 pCi/L < 3.4E+00 < 4.1E+00 < 9.1E+00 < 3.5E+00 < 7.0E+00 < 4.3E+00 < 6.5E+00 < 1.4E+01 < 3.7E+00 < 3.9E+00 < 2.8E+01 < 1.0E+01 MW-211 10/18/2023 pCi/L < 6.4E+00 < 5.8E+00 < 1.5E+01 < 5.6E+00 < 1.3E+01 < 8.0E+00 < 1.1E+01 < 1.1E+01 < 7.1E+00 < 6.9E+00 < 3.6E+01 < 1.2E+01 MW-213 5/24/2023 pCi/L < 7.4E+00 < 7.0E+00 < 1.7E+01 < 6.9E+00 < 1.4E+01 < 6.7E+00 < 9.6E+00 < 1.3E+01 < 8.5E+00 < 6.1E+00 < 3.9E+01 < 1.1E+01 MW-213 10/18/2023 pCi/L < 6.3E+00 < 6.6E+00 < 1.1E+01 < 6.9E+00 < 1.2E+01 < 6.5E+00 < 9.8E+00 < 1.1E+01 < 6.7E+00 < 6.0E+00 < 3.7E+01 < 1.5E+01 MW-215 5/25/2023 pCi/L < 8.7E+00 < 8.4E+00 < 1.9E+01 < 1.2E+01 < 1.0E+01 < 7.6E+00 < 1.7E+01 < 1.4E+01 < 7.7E+00 < 7.1E+00 < 3.7E+01 < 1.4E+01 MW-215 10/18/2023 pCi/L < 6.8E+00 < 6.4E+00 < 1.5E+01 < 7.3E+00 < 1.4E+01 < 8.0E+00 < 1.3E+01 < 1.3E+01 < 7.8E+00 < 6.5E+00 < 3.3E+01 < 1.1E+01 MW-217 5/25/2023 pCi/L < 6.8E+00 < 7.2E+00 < 1.6E+01 < 8.6E+00 < 1.3E+01 < 7.5E+00 < 1.3E+01 < 1.4E+01 < 8.2E+00 < 7.2E+00 < 3.9E+01 < 9.9E+00

RBG-48276 Rev. 2023 Page 57 of 70 Annual Radioactive Effluent Release Report Page 14 of 27 Groundwater Monitoring Well Sampling Results Table 19, Gamma Isotopic Results Station ID Sample Date Units MN-54 CO-58 FE-59 CO-60 ZN-65 NB-95 ZR-95 I-131 CS-134 CS-137 BA-140 LA-140 MW-217 10/18/2023 pCi/L < 7.4E+00 < 6.8E+00 < 1.4E+01 < 7.5E+00 < 1.2E+01 < 7.7E+00 < 1.0E+01 < 1.4E+01 < 5.5E+00 < 6.5E+00 < 3.3E+01 < 9.7E+00 MW-219 5/24/2023 pCi/L < 5.2E+00 < 5.2E+00 < 1.3E+01 < 7.6E+00 < 1.1E+01 < 5.0E+00 < 1.0E+01 < 1.5E+01 < 5.0E+00 < 5.1E+00 < 3.4E+01 < 1.0E+01 MW-219 10/18/2023 pCi/L < 4.1E+00 < 4.2E+00 < 1.0E+01 < 4.6E+00 < 8.1E+00 < 3.9E+00 < 6.6E+00 < 8.5E+00 < 4.7E+00 < 4.5E+00 < 2.4E+01 < 7.9E+00 MW-221 1/24/2023 pCi/L < 4.9E+00 < 5.1E+00 < 1.1E+01 < 4.1E+00 < 9.7E+00 < 3.6E+00 < 8.5E+00 < 1.4E+01 < 4.8E+00 < 3.9E+00 < 3.2E+01 < 8.7E+00 MW-221 5/23/2023 pCi/L < 1.3E+00 < 1.6E+00 < 3.6E+00 < 2.0E+00 < 2.9E+00 < 1.7E+00 < 3.2E+00 < 1.0E+01 < 1.7E+00 < 1.4E+00 < 1.7E+01 < 5.1E+00 MW-221 8/16/2023 pCi/L < 1.8E+00 < 2.1E+00 < 5.3E+00 < 1.9E+00 < 3.8E+00 < 2.1E+00 < 3.9E+00 < 1.2E+01 < 2.0E+00 < 1.9E+00 < 2.7E+01 < 9.1E+00 MW-221 10/18/2023 pCi/L < 3.7E+00 < 4.4E+00 < 8.8E+00 < 4.0E+00 < 8.3E+00 < 4.2E+00 < 7.0E+00 < 9.7E+00 < 4.2E+00 < 4.0E+00 < 2.2E+01 < 6.6E+00 MW-223 1/24/2023 pCi/L < 6.7E+00 < 4.5E+00 < 1.1E+01 < 6.9E+00 < 9.9E+00 < 5.3E+00 < 1.2E+01 < 1.4E+01 < 8.6E+00 < 6.5E+00 < 4.2E+01 < 1.3E+01 MW-223 5/24/2023 pCi/L < 4.4E+00 < 5.4E+00 < 1.2E+01 < 5.6E+00 < 1.0E+01 < 5.8E+00 < 9.5E+00 < 1.4E+01 < 5.5E+00 < 5.2E+00 < 3.2E+01 < 1.2E+01 MW-223 8/16/2023 pCi/L < 3.1E+00 < 4.1E+00 < 9.5E+00 < 5.1E+00 < 6.3E+00 < 3.6E+00 < 6.8E+00 < 1.4E+01 < 4.9E+00 < 3.5E+00 < 2.7E+01 < 9.4E+00 MW-223 10/18/2023 pCi/L < 4.2E+00 < 4.2E+00 < 1.0E+01 < 4.9E+00 < 9.4E+00 < 4.9E+00 < 7.9E+00 < 1.0E+01 < 5.1E+00 < 4.4E+00 < 2.4E+01 < 9.4E+00 MW-225 5/24/2023 pCi/L < 4.6E+00 < 5.3E+00 < 1.1E+01 < 5.7E+00 < 9.9E+00 < 5.2E+00 < 8.4E+00 < 1.5E+01 < 5.8E+00 < 5.3E+00 < 3.2E+01 < 1.0E+01 MW-225 10/18/2023 pCi/L < 3.1E+00 < 3.3E+00 < 7.0E+00 < 3.7E+00 < 6.3E+00 < 3.3E+00 < 5.2E+00 < 6.5E+00 < 3.2E+00 < 3.4E+00 < 1.7E+01 < 7.0E+00 MW-227 5/23/2023 pCi/L < 7.3E+00 < 8.9E+00 < 1.0E+01 < 6.3E+00 < 1.3E+01 < 7.0E+00 < 1.3E+01 < 1.4E+01 < 6.6E+00 < 6.4E+00 < 3.8E+01 < 1.1E+01 MW-227 10/17/2023 pCi/L < 2.0E+00 < 1.8E+00 < 4.5E+00 < 2.4E+00 < 3.8E+00 < 1.9E+00 < 3.2E+00 < 4.7E+00 < 2.0E+00 < 1.8E+00 < 1.1E+01 < 4.5E+00 MW-229 5/24/2023 pCi/L < 4.8E+00 < 5.9E+00 < 8.5E+00 < 5.5E+00 < 1.6E+01 < 6.2E+00 < 8.9E+00 < 1.1E+01 < 7.2E+00 < 5.9E+00 < 3.3E+01 < 1.3E+01 MW-229 10/18/2023 pCi/L < 4.4E+00 < 4.9E+00 < 1.0E+01 < 5.4E+00 < 8.9E+00 < 4.5E+00 < 8.2E+00 < 1.3E+01 < 4.3E+00 < 4.6E+00 < 2.3E+01 < 9.8E+00

RBG-48276 Rev. 2023 Page 58 of 70 Annual Radioactive Effluent Release Report Page 15 of 27 Groundwater Monitoring Well Sampling Results Table 19, Gamma Isotopic Results Station ID Sample Date Units MN-54 CO-58 FE-59 CO-60 ZN-65 NB-95 ZR-95 I-131 CS-134 CS-137 BA-140 LA-140 MW-231 5/24/2023 pCi/L < 2.9E+00 < 2.7E+00 < 6.1E+00 < 3.1E+00 < 6.3E+00 < 3.0E+00 < 5.3E+00 < 7.5E+00 < 3.0E+00 < 3.2E+00 < 1.8E+01 < 6.0E+00 MW-231 10/19/2023 pCi/L < 5.2E+00 < 4.6E+00 < 1.1E+01 < 5.2E+00 < 1.2E+01 < 6.0E+00 < 8.3E+00 < 1.3E+01 < 6.5E+00 < 6.3E+00 < 3.2E+01 < 8.3E+00 MW-233 5/24/2023 pCi/L < 5.9E+00 < 5.5E+00 < 1.1E+01 < 4.6E+00 < 1.2E+01 < 4.7E+00 < 9.8E+00 < 1.4E+01 < 5.3E+00 < 5.6E+00 < 3.3E+01 < 1.2E+01 MW-233 10/18/2023 pCi/L < 5.1E+00 < 4.7E+00 < 1.1E+01 < 6.1E+00 < 1.1E+01 < 5.1E+00 < 8.3E+00 < 1.2E+01 < 5.4E+00 < 5.0E+00 < 2.9E+01 < 1.3E+01 MW-235 5/24/2023 pCi/L < 5.5E+00 < 4.6E+00 < 9.2E+00 < 4.4E+00 < 8.7E+00 < 5.6E+00 < 8.6E+00 < 1.3E+01 < 5.5E+00 < 5.1E+00 < 3.4E+01 < 1.2E+01 MW-235 10/18/2023 pCi/L < 4.8E+00 < 5.2E+00 < 1.3E+01 < 6.5E+00 < 1.2E+01 < 5.2E+00 < 8.3E+00 < 1.4E+01 < 5.3E+00 < 4.3E+00 < 3.2E+01 < 1.2E+01 PZ-01 1/24/2023 pCi/L < 3.8E+00 < 4.1E+00 < 1.2E+01 < 4.3E+00 < 7.2E+00 < 5.5E+00 < 7.6E+00 < 1.2E+01 < 4.1E+00 < 5.1E+00 < 2.7E+01 < 1.1E+01 PZ-01 5/23/2023 pCi/L < 1.9E+00 < 2.1E+00 < 4.8E+00 < 2.0E+00 < 3.8E+00 < 2.3E+00 < 3.8E+00 < 1.5E+01 < 2.0E+00 < 1.9E+00 < 2.3E+01 < 7.5E+00 PZ-01 5/23/2023 pCi/L < 1.6E+00 < 2.0E+00 < 4.6E+00 < 1.8E+00 < 3.3E+00 < 2.1E+00 < 3.5E+00 < 1.2E+01 < 2.0E+00 < 1.7E+00 < 2.0E+01 < 7.0E+00 PZ-01 8/15/2023 pCi/L < 1.5E+00 < 1.9E+00 < 4.3E+00 < 1.7E+00 < 3.0E+00 < 1.9E+00 < 3.2E+00 < 1.1E+01 < 1.6E+00 < 1.6E+00 < 2.2E+01 < 8.4E+00 PZ-01 10/17/2023 pCi/L < 4.0E+00 < 4.5E+00 < 9.1E+00 < 5.3E+00 < 7.9E+00 < 3.7E+00 < 6.6E+00 < 9.6E+00 < 5.0E+00 < 4.0E+00 < 2.6E+01 < 1.0E+01 PZ-03 5/24/2023 pCi/L < 4.2E+00 < 4.7E+00 < 9.2E+00 < 5.3E+00 < 8.4E+00 < 4.9E+00 < 8.3E+00 < 1.3E+01 < 4.5E+00 < 3.6E+00 < 2.9E+01 < 8.4E+00 PZ-03 10/18/2023 pCi/L < 4.9E+00 < 6.4E+00 < 1.1E+01 < 4.9E+00 < 1.2E+01 < 6.9E+00 < 9.0E+00 < 1.4E+01 < 5.4E+00 < 6.1E+00 < 3.3E+01 < 1.0E+01 SW-101 1/24/2023 pCi/L < 7.2E+00 < 5.7E+00 < 1.4E+01 < 5.8E+00 < 1.2E+01 < 6.2E+00 < 9.0E+00 < 1.4E+01 < 6.7E+00 < 5.0E+00 < 2.9E+01 < 8.1E+00 SW-101 5/24/2023 pCi/L < 5.9E+00 < 5.1E+00 < 1.7E+01 < 6.2E+00 < 1.3E+01 < 7.0E+00 < 1.1E+01 < 1.4E+01 < 7.1E+00 < 6.6E+00 < 3.4E+01 < 1.0E+01 SW-102 1/24/2023 pCi/L < 6.5E+00 < 5.8E+00 < 1.3E+01 < 6.4E+00 < 1.3E+01 < 7.2E+00 < 1.2E+01 < 1.5E+01 < 6.2E+00 < 7.1E+00 < 3.6E+01 < 1.1E+01 SW-102 5/25/2023 pCi/L < 3.8E+00 < 7.6E+00 < 1.2E+01 < 6.8E+00 < 1.4E+01 < 7.1E+00 < 1.3E+01 < 1.3E+01 < 7.9E+00 < 5.7E+00 < 3.9E+01 < 9.9E+00

RBG-48276 Rev. 2023 Page 59 of 70 Annual Radioactive Effluent Release Report Page 16 of 27 Groundwater Monitoring Well Sampling Results Table 19, Gamma Isotopic Results Station ID Sample Date Units MN-54 CO-58 FE-59 CO-60 ZN-65 NB-95 ZR-95 I-131 CS-134 CS-137 BA-140 LA-140 SW-103 1/24/2023 pCi/L < 9.4E+00 < 8.1E+00 < 1.4E+01 < 8.4E+00 < 1.3E+01 < 8.2E+00 < 1.1E+01 < 1.3E+01 < 8.0E+00 < 7.6E+00 < 3.8E+01 < 1.0E+01 SW-103 5/25/2023 pCi/L < 5.8E+00 < 5.4E+00 < 1.4E+01 < 6.5E+00 < 1.3E+01 < 7.1E+00 < 1.2E+01 < 1.3E+01 < 8.4E+00 < 6.9E+00 < 3.5E+01 < 1.4E+01 SW-103 8/16/2023 pCi/L < 4.3E+00 < 5.4E+00 < 1.0E+01 < 4.8E+00 < 1.0E+01 < 5.0E+00 < 8.5E+00 < 1.4E+01 < 4.7E+00 < 4.7E+00 < 3.0E+01 < 1.2E+01 SW-103 10/19/2023 pCi/L < 5.6E+00 < 6.1E+00 < 1.3E+01 < 7.1E+00 < 1.2E+01 < 7.7E+00 < 1.2E+01 < 1.4E+01 < 5.4E+00 < 5.9E+00 < 3.8E+01 < 1.2E+01 SW-104 1/26/2023 pCi/L < 4.9E+00 < 4.9E+00 < 1.6E+01 < 7.2E+00 < 1.1E+01 < 6.1E+00 < 1.2E+01 < 1.4E+01 < 6.8E+00 < 5.9E+00 < 3.3E+01 < 1.3E+01 SW-104 5/25/2023 pCi/L < 5.6E+00 < 5.0E+00 < 1.0E+01 < 6.3E+00 < 1.3E+01 < 5.4E+00 < 1.0E+01 < 1.4E+01 < 6.0E+00 < 5.3E+00 < 3.1E+01 < 1.1E+01 T-14 10/18/2023 pCi/L < 4.1E+00 < 4.3E+00 < 9.6E+00 < 4.5E+00 < 8.4E+00 < 4.2E+00 < 7.5E+00 < 9.5E+00 < 4.2E+00 < 4.1E+00 < 2.3E+01 < 7.9E+00 Table 20, Hard to Detect Nuclides Station ID Sample Date Units FE-55 NI-63 SR-89 SR-90 AM-241 CM-242 CM-243/244 PU-238 MW-125 01/25/2023 pCi/L < 5.4E+01 < 2.2E+01 < 5.4E+00 < 1.6E+00 < 1.6E-01 < 5.3E-02 < 6.4E-02 < 3.0E-01

RBG-48276 Rev. 2023 Page 60 of 70 Annual Radioactive Effluent Release Report Page 17 of 27 Groundwater Monitoring Well Sampling Results Table 21, Tritium Analysis Results Station ID Start Date Units H-3 Station ID Start Date Units H-3 MW-04 10/18/2023 pCi/L < 5.3E+02 MW-108 10/19/2023 pCi/L < 5.5E+02 MW-05 10/18/2023 pCi/L < 5.5E+02 MW-110 1/24/2023 pCi/L 9.30E+03 MW-08 10/18/2023 pCi/L < 5.3E+02 MW-110 5/24/2023 pCi/L 1.40E+04 MW-100 1/25/2023 pCi/L < 5.1E+02 MW-110 8/15/2023 pCi/L 1.40E+04 MW-100 5/24/2023 pCi/L < 4.9E+02 MW-110 10/18/2023 pCi/L 1.10E+04 MW-100 8/15/2023 pCi/L < 5.8E+02 MW-111 10/19/2023 pCi/L < 5.4E+02 MW-100 10/18/2023 pCi/L < 5.3E+02 MW-112 1/24/2023 pCi/L 2.90E+03 MW-103 10/18/2023 pCi/L < 5.4E+02 MW-112 5/24/2023 pCi/L 1.80E+03 MW-104 10/19/2023 pCi/L < 5.1E+02 MW-112 8/16/2023 pCi/L 2.30E+03 MW-106 5/24/2023 pCi/L < 5.0E+02 MW-112 10/17/2023 pCi/L 2.30E+03 MW-106 10/19/2023 pCi/L < 5.2E+02 MW-112 10/17/2023 pCi/L 2.90E+03 MW-107 10/19/2023 pCi/L < 5.6E+02 MW-114 1/24/2023 pCi/L 1.40E+03

RBG-48276 Rev. 2023 Page 61 of 70 Annual Radioactive Effluent Release Report Page 18 of 27 Groundwater Monitoring Well Sampling Results Table 21, Tritium Analysis Results Station ID Start Date Units H-3 Station ID Start Date Units H-3 MW-114 5/24/2023 pCi/L 8.30E+02 MW-118 10/18/2023 pCi/L 2.90E+03 MW-114 8/16/2023 pCi/L 1.10E+03 MW-120 5/24/2023 pCi/L < 5.7E+02 MW-114 10/17/2023 pCi/L 1.10E+03 MW-120 5/24/2023 pCi/L < 5.0E+02 MW-114 10/17/2023 pCi/L 9.30E+02 MW-120 10/19/2023 pCi/L < 5.2E+02 MW-116 1/24/2023 pCi/L 4.40E+03 MW-122R 5/24/2023 pCi/L < 5.0E+02 MW-116 5/24/2023 pCi/L 1.70E+03 MW-122R 10/19/2023 pCi/L < 5.3E+02 MW-116 8/16/2023 pCi/L 2.00E+03 MW-124 1/25/2023 pCi/L 1.20E+05 MW-116 10/17/2023 pCi/L 3.90E+03 MW-124 5/23/2023 pCi/L 1.60E+05 MW-118 1/24/2023 pCi/L 2.40E+03 MW-124 8/15/2023 pCi/L 1.20E+05 MW-118 5/24/2023 pCi/L 2.70E+03 MW-124 8/15/2023 pCi/L 1.30E+05 MW-118 8/15/2023 pCi/L 3.20E+03 MW-124 10/17/2023 pCi/L 1.10E+05 MW-118 8/15/2023 pCi/L 3.40E+03 MW-125 1/25/2023 pCi/L 2.60E+05

RBG-48276 Rev. 2023 Page 62 of 70 Annual Radioactive Effluent Release Report Page 19 of 27 Groundwater Monitoring Well Sampling Results Table 21, Tritium Analysis Results Station ID Start Date Units H-3 Station ID Start Date Units H-3 MW-125 5/23/2023 pCi/L 2.30E+05 MW-130 10/18/2023 pCi/L < 5.5E+02 MW-125 8/15/2023 pCi/L 2.30E+05 MW-131 5/24/2023 pCi/L < 4.9E+02 MW-125 10/17/2023 pCi/L 2.00E+05 MW-131 10/18/2023 pCi/L < 5.4E+02 MW-126 1/25/2023 pCi/L 7.40E+03 MW-131 10/18/2023 pCi/L < 5.5E+02 MW-126 5/24/2023 pCi/L 3.10E+03 MW-132 5/25/2023 pCi/L < 5.1E+02 MW-126 8/15/2023 pCi/L 1.90E+03 MW-132 10/18/2023 pCi/L < 5.4E+02 MW-126 10/17/2023 pCi/L 2.20E+03 MW-134 5/25/2023 pCi/L < 5.1E+02 MW-128 5/24/2023 pCi/L < 5.1E+02 MW-134 10/18/2023 pCi/L < 5.6E+02 MW-128 5/24/2023 pCi/L < 5.1E+02 MW-137 1/24/2023 pCi/L 5.00E+03 MW-128 10/18/2023 pCi/L < 5.6E+02 MW-137 5/24/2023 pCi/L 4.20E+03 MW-130 5/24/2023 pCi/L < 5.0E+02 MW-137 8/16/2023 pCi/L 7.00E+03 MW-130 10/18/2023 pCi/L < 5.5E+02 MW-137 10/17/2023 pCi/L 4.60E+03

RBG-48276 Rev. 2023 Page 63 of 70 Annual Radioactive Effluent Release Report Page 20 of 27 Groundwater Monitoring Well Sampling Results Table 21, Tritium Analysis Results Station ID Start Date Units H-3 Station ID Start Date Units H-3 MW-137 10/17/2023 pCi/L 4.10E+03 MW-142 8/16/2023 pCi/L < 6.0E+02 MW-139 1/24/2023 pCi/L < 5.1E+02 MW-142 10/17/2023 pCi/L < 5.6E+02 MW-139 5/24/2023 pCi/L < 5.0E+02 MW-144 1/25/2023 pCi/L < 5.0E+02 MW-139 8/16/2023 pCi/L < 5.9E+02 MW-144 5/23/2023 pCi/L 8.60E+02 MW-139 10/19/2023 pCi/L < 5.3E+02 MW-144 8/16/2023 pCi/L 1.10E+03 MW-14 10/17/2023 pCi/L < 5.5E+02 MW-144 10/17/2023 pCi/L 1.20E+03 MW-141 1/24/2023 pCi/L 1.30E+03 MW-146 1/25/2023 pCi/L 4.40E+04 MW-141 5/24/2023 pCi/L 1.60E+03 MW-146 5/23/2023 pCi/L 1.50E+04 MW-141 8/15/2023 pCi/L 1.60E+03 MW-146 8/16/2023 pCi/L 4.10E+03 MW-141 10/17/2023 pCi/L 1.60E+03 MW-146 10/17/2023 pCi/L 3.00E+03 MW-142 1/25/2023 pCi/L 7.10E+02 MW-147 1/25/2023 pCi/L 1.10E+04 MW-142 5/23/2023 pCi/L < 6.0E+02 MW-147 5/23/2023 pCi/L 1.20E+03

RBG-48276 Rev. 2023 Page 64 of 70 Annual Radioactive Effluent Release Report Page 21 of 27 Groundwater Monitoring Well Sampling Results Table 21, Tritium Analysis Results Station ID Start Date Units H-3 Station ID Start Date Units H-3 MW-147 8/16/2023 pCi/L 1.10E+03 MW-153 1/26/2023 pCi/L 1.20E+03 MW-147 10/17/2023 pCi/L 1.20E+03 MW-153 5/23/2023 pCi/L 1.20E+03 MW-148 1/25/2023 pCi/L < 5.1E+02 MW-153 8/16/2023 pCi/L 7.50E+02 MW-148 5/23/2023 pCi/L < 4.8E+02 MW-153 10/18/2023 pCi/L 9.00E+02 MW-148 8/16/2023 pCi/L 2.40E+03 MW-155 1/25/2023 pCi/L 9.70E+04 MW-148 10/17/2023 pCi/L 1.60E+04 MW-155 5/24/2023 pCi/L 6.30E+04 MW-151 1/25/2023 pCi/L 7.20E+02 MW-155 8/15/2023 pCi/L 5.90E+04 MW-151 3/29/2023 pCi/L < 5.0E+02 MW-155 10/17/2023 pCi/L 4.10E+04 MW-151 5/24/2023 pCi/L < 5.1E+02 MW-156 1/25/2023 pCi/L 3.70E+04 MW-151 5/24/2023 pCi/L 4.40E+03 MW-156 5/24/2023 pCi/L 3.50E+04 MW-151 8/15/2023 pCi/L < 5.8E+02 MW-156 8/15/2023 pCi/L 4.50E+04 MW-151 10/18/2023 pCi/L < 5.2E+02 MW-156 10/17/2023 pCi/L 6.00E+04

RBG-48276 Rev. 2023 Page 65 of 70 Annual Radioactive Effluent Release Report Page 22 of 27 Groundwater Monitoring Well Sampling Results Table 21, Tritium Analysis Results Station ID Start Date Units H-3 Station ID Start Date Units H-3 MW-157 1/25/2023 pCi/L 2.10E+05 MW-159 8/16/2023 pCi/L 2.50E+04 MW-157 1/25/2023 pCi/L 2.10E+05 MW-159 10/17/2023 pCi/L 1.80E+04 MW-157 5/24/2023 pCi/L 2.00E+05 MW-161 1/24/2023 pCi/L 1.60E+03 MW-157 5/24/2023 pCi/L 2.00E+05 MW-161 5/23/2023 pCi/L 9.60E+02 MW-157 8/15/2023 pCi/L 2.20E+05 MW-161 8/16/2023 pCi/L 1.20E+03 MW-157 10/17/2023 pCi/L 2.30E+05 MW-161 10/18/2023 pCi/L 9.70E+02 MW-158 1/25/2023 pCi/L 1.10E+05 MW-162 1/25/2023 pCi/L < 5.1E+02 MW-158 5/23/2023 pCi/L 3.30E+04 MW-162 5/23/2023 pCi/L < 5.0E+02 MW-158 8/16/2023 pCi/L 3.10E+04 MW-162 8/16/2023 pCi/L < 5.9E+02 MW-158 10/17/2023 pCi/L 2.50E+04 MW-162 10/17/2023 pCi/L < 5.4E+02 MW-159 1/25/2023 pCi/L 4.10E+04 MW-164 1/25/2023 pCi/L < 5.1E+02 MW-159 5/23/2023 pCi/L 3.60E+04 MW-164 5/24/2023 pCi/L < 5.0E+02

RBG-48276 Rev. 2023 Page 66 of 70 Annual Radioactive Effluent Release Report Page 23 of 27 Groundwater Monitoring Well Sampling Results Table 21, Tritium Analysis Results Station ID Start Date Units H-3 Station ID Start Date Units H-3 MW-164 8/15/2023 pCi/L < 5.8E+02 MW-169 10/18/2023 pCi/L < 5.3E+02 MW-164 8/15/2023 pCi/L < 5.8E+02 MW-170 1/25/2023 pCi/L < 5.0E+02 MW-164 10/18/2023 pCi/L < 5.5E+02 MW-170 5/24/2023 pCi/L < 5.1E+02 MW-165 1/25/2023 pCi/L < 5.0E+02 MW-170 8/16/2023 pCi/L < 5.8E+02 MW-165 5/24/2023 pCi/L < 5.1E+02 MW-170 10/19/2023 pCi/L < 5.3E+02 MW-165 8/15/2023 pCi/L < 5.9E+02 MW-172 10/17/2023 pCi/L < 5.5E+02 MW-165 8/15/2023 pCi/L < 5.9E+02 MW-174 10/17/2023 pCi/L < 5.5E+02 MW-165 10/18/2023 pCi/L < 5.5E+02 MW-178 1/25/2023 pCi/L 2.10E+03 MW-167 5/24/2023 pCi/L < 5.0E+02 MW-178 5/24/2023 pCi/L 2.30E+03 MW-167 10/18/2023 pCi/L < 5.4E+02 MW-178 5/24/2023 pCi/L 2.00E+03 MW-167 10/18/2023 pCi/L < 5.5E+02 MW-178 8/15/2023 pCi/L 6.90E+03 MW-169 5/25/2023 pCi/L < 5.0E+02 MW-178 10/18/2023 pCi/L 6.60E+03

RBG-48276 Rev. 2023 Page 67 of 70 Annual Radioactive Effluent Release Report Page 24 of 27 Groundwater Monitoring Well Sampling Results Table 21, Tritium Analysis Results Station ID Start Date Units H-3 Station ID Start Date Units H-3 MW-179 1/25/2023 pCi/L 1.20E+05 MW-182 10/19/2023 pCi/L < 5.1E+02 MW-179 5/24/2023 pCi/L 9.30E+04 MW-185 1/25/2023 pCi/L < 4.9E+02 MW-179 8/15/2023 pCi/L 1.30E+05 MW-185 1/25/2023 pCi/L < 5.1E+02 MW-179 10/18/2023 pCi/L 3.50E+04 MW-185 5/24/2023 pCi/L < 5.1E+02 MW-179 10/18/2023 pCi/L 1.10E+05 MW-185 8/15/2023 pCi/L < 5.8E+02 MW-18 10/18/2023 pCi/L < 5.4E+02 MW-185 10/17/2023 pCi/L < 5.5E+02 MW-180 5/24/2023 pCi/L < 5.0E+02 MW-186 1/25/2023 pCi/L < 5.1E+02 MW-180 10/19/2023 pCi/L < 5.2E+02 MW-186 5/24/2023 pCi/L < 5.0E+02 MW-182 1/24/2023 pCi/L < 5.1E+02 MW-186 8/15/2023 pCi/L < 5.7E+02 MW-182 5/24/2023 pCi/L < 5.2E+02 MW-186 10/18/2023 pCi/L < 5.4E+02 MW-182 5/24/2023 pCi/L < 5.1E+02 MW-187 1/25/2023 pCi/L < 5.0E+02 MW-182 8/16/2023 pCi/L < 5.8E+02 MW-187 1/25/2023 pCi/L < 5.1E+02

RBG-48276 Rev. 2023 Page 68 of 70 Annual Radioactive Effluent Release Report Page 25 of 27 Groundwater Monitoring Well Sampling Results Table 21, Tritium Analysis Results Station ID Start Date Units H-3 Station ID Start Date Units H-3 MW-187 5/24/2023 pCi/L < 5.0E+02 MW-207 5/24/2023 pCi/L < 5.1E+02 MW-187 8/15/2023 pCi/L < 5.7E+02 MW-207 10/18/2023 pCi/L < 5.5E+02 MW-187 10/18/2023 pCi/L < 5.4E+02 MW-207 10/18/2023 pCi/L < 5.4E+02 MW-188 1/25/2023 pCi/L < 5.0E+02 MW-209 1/26/2023 pCi/L < 5.0E+02 MW-188 5/23/2023 pCi/L < 5.2E+02 MW-209 5/24/2023 pCi/L < 5.0E+02 MW-188 8/15/2023 pCi/L < 5.8E+02 MW-209 8/16/2023 pCi/L < 5.8E+02 MW-188 8/15/2023 pCi/L < 5.9E+02 MW-209 10/19/2023 pCi/L < 5.4E+02 MW-188 10/17/2023 pCi/L < 5.4E+02 MW-211 1/25/2023 pCi/L 7.40E+02 MW-201 5/24/2023 pCi/L < 4.9E+02 MW-211 1/25/2023 pCi/L < 4.7E+02 MW-201 10/18/2023 pCi/L < 5.1E+02 MW-211 5/24/2023 pCi/L < 6.2E+02 MW-205 5/23/2023 pCi/L < 5.1E+02 MW-211 8/15/2023 pCi/L < 5.8E+02 MW-205 10/18/2023 pCi/L < 5.4E+02 MW-211 10/18/2023 pCi/L 8.00E+02

RBG-48276 Rev. 2023 Page 69 of 70 Annual Radioactive Effluent Release Report Page 26 of 27 Groundwater Monitoring Well Sampling Results Table 21, Tritium Analysis Results Station ID Start Date Units H-3 Station ID Start Date Units H-3 MW-213 5/24/2023 pCi/L < 5.1E+02 MW-223 1/24/2023 pCi/L < 5.0E+02 MW-213 10/18/2023 pCi/L < 5.6E+02 MW-223 5/24/2023 pCi/L < 5.1E+02 MW-215 5/25/2023 pCi/L < 5.1E+02 MW-223 8/16/2023 pCi/L < 5.9E+02 MW-215 10/18/2023 pCi/L < 5.4E+02 MW-223 10/18/2023 pCi/L < 5.5E+02 MW-217 5/25/2023 pCi/L < 5.0E+02 MW-225 5/24/2023 pCi/L < 5.1E+02 MW-217 10/18/2023 pCi/L < 5.5E+02 MW-225 10/18/2023 pCi/L < 5.5E+02 MW-219 5/24/2023 pCi/L < 5.0E+02 MW-227 5/23/2023 pCi/L < 5.0E+02 MW-219 10/18/2023 pCi/L < 5.4E+02 MW-227 10/17/2023 pCi/L < 5.4E+02 MW-221 1/24/2023 pCi/L 9.90E+02 MW-229 5/24/2023 pCi/L < 5.1E+02 MW-221 5/23/2023 pCi/L 8.90E+02 MW-229 10/18/2023 pCi/L < 5.4E+02 MW-221 8/16/2023 pCi/L < 5.8E+02 MW-231 5/24/2023 pCi/L < 4.9E+02 MW-221 10/18/2023 pCi/L < 5.4E+02 MW-231 10/19/2023 pCi/L < 5.3E+02

RBG-48276 Rev. 2023 Page 70 of 70 Annual Radioactive Effluent Release Report Page 27 of 27 Groundwater Monitoring Well Sampling Results Table 21, Tritium Analysis Results Station ID Start Date Units H-3 Station ID Start Date Units H-3 MW-233 5/24/2023 pCi/L < 5.1E+02 SW-101 5/24/2023 pCi/L < 5.1E+02 MW-233 10/18/2023 pCi/L < 5.3E+02 SW-101 8/16/2023 pCi/L < 6.0E+02 MW-235 5/24/2023 pCi/L < 4.7E+02 SW-102 1/24/2023 pCi/L < 5.1E+02 MW-235 10/18/2023 pCi/L < 5.4E+02 SW-102 5/25/2023 pCi/L < 5.0E+02 PZ-01 1/24/2023 pCi/L 2.70E+04 SW-103 1/24/2023 pCi/L < 5.0E+02 PZ-01 5/23/2023 pCi/L 2.60E+04 SW-103 5/25/2023 pCi/L < 5.0E+02 PZ-01 5/23/2023 pCi/L 2.60E+04 SW-103 8/16/2023 pCi/L < 5.7E+02 PZ-01 8/15/2023 pCi/L 2.40E+04 SW-103 10/19/2023 pCi/L < 5.4E+02 PZ-01 10/17/2023 pCi/L 1.90E+04 SW-104 1/26/2023 pCi/L < 5.0E+02 PZ-03 5/24/2023 pCi/L < 5.2E+02 SW-104 5/25/2023 pCi/L < 5.0E+02 PZ-03 10/18/2023 pCi/L < 5.5E+02 SW-104 8/16/2023 pCi/L < 5.8E+02 SW-101 1/24/2023 pCi/L < 5.0E+02 T-14 10/18/2023 pCi/L < 5.3E+02}}

RBG-48276, 2023 Annual Radioactive Effluent Release Report

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RBG-48276, 2023 Annual Radioactive Effluent Release Report

Text

Subject:

Enclosure:

1.0 INTRODUCTION

SUMMARY

1.0 INTRODUCTION

SUMMARY

Navigation menu

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