RBG-48220, Submittal of 2022 Annual Radioactive Effluent Release Report

Submittal of 2022 Annual Radioactive Effluent Release Report

ML23115A482
Person / Time
Site:	River Bend
Issue date:	04/25/2023
From:	Crawford R Entergy Nuclear Operations
To:	Office of Nuclear Reactor Regulation, Document Control Desk
References
RBG-48220
Download: ML23115A482 (1)

Text

entergy Randy Crawford Manager Regulatory Assurance 225-381-4177 RBG-48220 April 25, 2023 ATTN: Document Control Desk U.S. Nuclear Regulatory Commission Washington, DC 20555-0001

Subject:

2022 Annual Radioactive Effluent Release Report River Bend Station - Unit 1 Renewed Operating License No. NPF-47 Docket No. 50-458 Enclosed is the River Bend Station (RBS) Annual Radioactive Effluent Release Report for the period of January 1, 2022, through December 31, 2022. 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:

2022 Annual Radioactive Effluent Release Report cc: NRC Senior Resident Inspector - River Bend Station, Unit 1

Enclosure 2022 Annual Radioactive Effluent Release Report

entergy Page 1 of 70 Plant: River Bend Nuclear Station YEAR: 2022 Document Number: RBG-48220 Annual Radioactive Effluent Release Report Review and Approval:

Site VP Bob Franssen Print Sign

¢3 Date GMPO Bruce Chenard c tJ/1)2.3 Print Sign Date Mgr, Regulatory Assurance

_R_ an

_ _d _y _c_ra_w_fo_r d Print Sign Date Sr Mgr, Radiation Protection Kimberly Jacobs McDuffie Print Date Mgr, Chemistry Emily R obertson Print Date q

Peer Review Travis Matthews Print Sign Date Preparer Mann y Dumatrait of 11* '.2.3 Print Date

Plant: River Bend Nuclear Station I Year: 2022 I 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........................................................................................................... 12 4.0 LIQUID EFFLUENTS ................................................................................................................ 16 5.0 SOLID WASTE

SUMMARY

...................................................................................................... 21 6.0 RADIOLOGICAL IMPACT TO MAN .......................................................................................... 24 7.0 METEORLOGICAL DATA ......................................................................................................... 27 ATTACHMENTS - Groundwater Monitoring Well Sampling Results ...........................................................44

Plant: River Bend Nuclear Station I Vear: 2022 I 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 ,

2022, through December 31 , 2022. 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 1 0CFR50, Appendix I Limits

1. Fission and activation gases:

a. In accordance with Technical Requirement (TR) 3.1 1 .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

• Less than or equal to 5 mrads gamma

• Less than or equal to 1 0 mrads beta

2) Yearly

• Less than or equal to 1 0 mrads gamma

• 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 3.1 1 .2.3, the dose to a MEMBER OF THE PUBLIC from radioiodines (1- 1 3 1 and 1- 1 33), 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

• Less than or equal to 7.5 mrem to any organ

2) Yearly

• Less than or equal to 1 5 mrem to any organ

Plant: River Bend Nuclear Station I Year: 2022 I Page 4 of 70 Annual Radioactive Effluent Release Report

3. Liquid Effluents Dose

a. In accordance with Technical Requirement 3.1 1 . 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

• Less than or equal to 1 .5 mrem total body

• Less than or equal to 5 mrem critical organ

2) Yearly

• Less than or equal to 3 mrem total body

• Less than or equal to 1 O mrem critical organ

4. Total Dose (40CFR1 90)

a. In accordance with Technical Requirement 3.1 1 .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:

• Less than or equal to 25 mrem, Total Body or any Organ except Thyroid.

• Less than or equal to 75 mrem, Thyroid 2.1 .2 Miscellaneous Limits

1. Technical Requirement 3.1 1 .2.1 - Fission and Activation Gases

a. In accordance with Technical Requirement 3.1 1 .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:

• Less than or equal to 500 mrem/year to the total body

• Less than or equal to 3000 mrem/year to the skin

2. Technical Requirement 3.1 1 .2.1 - Radioiodine (1-1 3 1 & 1-1 33) and Particulate

a. In accordance with Technical Requirement 3.1 1 .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:

• Less than or equal to 1 500 mrem/yr to any organ

Plant: River Bend Nuclear Station I Vear: 2022 I 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 1 0CFR20 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 1 0CFR20, 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 4.

Plant: River Bend Nuclear Station I Year: 2022 I 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 (1- 1 3 1 & 1-1 33)

Particulates, lodine-1 31 and lodine-1 33 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 4. 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 4 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 I Year: 2022 I Page 7 of 70 Annual Radioactive Effluent Release Report

d. Carbon-1 4 The bounding annual dose from C-1 4 was calculated using guidance from Regulatory Guide 1.21 , Revision 2, NUREG-001 6, and the methodology in Regulatory Guide 1 . 1 09. The results of this calculation are listed in Table 1 3. The C-1 4 source term of 1 1 curies was taken from the site calculation PR(C)-359-3A, Gaseous Releases per NUREG-001 6 Revision 1 . Carbon- 1 4 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-1 4 is considered to be insignificant as indicated in Regulatory Guide 1 .21 ,

Revision 2. According to EPRI 1 02 1 1 06, Estimation of Carbon-1 4 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 2022.

f. Gaseous Effluent Summary Information Gaseous effluent summary information is located in Table 1 , Table 2, and Table 3. 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 4. 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 8. 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. lron-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 5 and Table 6.

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 8. Also, any nuclide not appearing in the tables was < LLD for all four quarters.

Plant: River Bend Nuclear Station I Year: 2022 I 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

+/- 14.2%

Noble Gases 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:

Er = total error E1 ... En= individual errors due to sample collection, laboratory analysis, sample flow, process flow, monitor accuracy, etc.

Plant: River Bend Nuclear Station I Year: 2022 I 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 , 2022, through December 31 , 2022 are shown in Table 7.

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 , 2022, through December 3 1 , 2022.

2.5 Abnormal Releases There were no abnormal releases in 2022.

2.6 Major Changes to Radioactive Liquid, Gaseous, and Solid Waste Treatment Systems Engineering performed a review of the Asset Suite database to evaluate non administrative design changes completed or partially completed during 2022 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.

2.7 Land Use Census Changes The Land Use Census for 2022 was conducted as required by the Technical Requirements Manual (TRM) (TR 3.12.2). The results of the Land Use Census will be included in the Annual Radiological Environmental Operating Report pursuant to Technical Specification 5.6.2.

A garden census is not conducted pursuant to the note in the TRM 3. 1 2.2 that allows the sampling of broadleaf vegetation in the highest calculated average ground-level D/Q sector near site boundary in lieu of the garden census.

Plant: River Bend Nuclear Station I Year: 2022 I Page 10 of 70 Annual Radioactive Effluent Release Report The milk animal census identified no milk animals within 8 km (5 miles) of River Bend site. This information was verified by the County Agents from West Feliciana, East Feliciana, and Pointe Coupee parishes.

No locations were identified this period that would yield a calculated dose or dose commitment greater than those currently calculated in Requirement TSR 3.1 1 .2.3. 1 .

The County Agents confirmed that there was no commercial harvesting of crawfish within the five-mile radius downstream of RBS. RBS conservatively uses the invertebrate pathway although not required by NUREG-01 33 liquid dose factor methodology for fresh water nuclear power plants.

2.8 Effluent Monitor Instrument lnoperability 2.8.1 Radioactive Liquid Effluent Monitoring Instrumentation Operability The minimum number of channels required to be OPERABLE as described in Table 3.3. 1 1 .2-1 of Technical Requirement 3.3.1 1 .2 were, if inoperable at any time in the period January 1 , 2020, through December 3 1 , 2020, 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. 1 1 .3-1 of Technical Requirement 3.3.1 1 .3 were, if inoperable at any time in the period January 1 , 2022, through December 3 1 , 2022, 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 2022.

2.10 Radiological Environmental Monitoring Program Changes There were no changes to the Radiological Environmental Monitoring Program during the reporting period January 1 , 2022, through December 31 , 2022. Process Control Program (PCP) Changes 2.11 Process Control Program (PCP) Changes There were no changes to the Process Control Program (PCP) in 2022.NON-REMP Groundwater Monitoring Results (NEI 07-07) 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 2022 are located in Table 1 7, Table 1 8, and Table 1 9.

River Bend Station made no NEI 07-07 voluntary notifications in 2022.

Plant: River Bend Nuclear Station I Year: 2022 I Page 1 1 of 70 Annual Radioactive Effluent Release Report 2.1 3 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 , 2022, through December 3 1 , 2022 was less than or equal to the 1 0 curie limit as required by Technical Specification 5.5.8.b.

2.1 4 Errata/Corrections to Previous ARERRs There were no Errata issued or corrections to previous ARERRs for the 2022 reporting period.

Plant: River Bend Nuclear Station I Year: 2022 I Page 1 2 of 70 Annual Radioactive Effluent Release Report 3.0 GASEOUS EFFLUENTS 3.1 Gas Effluent and Waste Disposal Report Table 1 , Gaseous Effluents-Summation of All Releases A. Fission & Activation Gases Unit Quarter Quarter Quarter Quarter Annual 2 3 4

1. Total Release Ci 9 . 1 4 E+00 9.32E+00 3 . 1 7E+01 3.28E+01 8.30E+01

2. Average release rate for the period µCi/sec 1 . 1 8E+00 1 . 1 9E+00 3.99E+00 4 . 1 3E+00 2.63E+00 B. Iodine

1. Total lodine-1 31 Ci 2.54E-03 2.09E-03 2.25E-03 2.47E-03 9.35E-03

2. Average release rate for the period µCi/sec 3.27E-04 2.65E-04 2.84E-04 3 . 1 1 E-04 2.97E-04 C. Particulates

1. Particulates with half-lives > 8 days Ci 8.57E-05 2.02E-04 6.62E-05 1 .71 E-04 5 .25E-04

2. Average release rate for the period µCi/sec 1 . 1 0E-05 2.57E-05 8.33E-06 2.1 5E-05 1 .66E-05 D. Tritium

1. Total Release Ci 1 .84E+00 2.1 2E+00 2.49E+00 2.70E+00 9 . 1 4E+00

2. Average release rate for the period µCi/sec 2.37E-01 2.69E-01 3.1 3E-01 3.39E-01 2.90E-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 µCi/sec 0.00E+00 0.00E+00 0.00E+00 0.00E+00 O.00E+00 F. Carbon-14

1. Total Release Ci 2.71 E+00 2.74 E+00 2.77E+00 2.77E+00 1 . 1 E+01

2. Average release rate for the period µCi/sec 3.49E-01 3.48E-01 3.48E-01 3.48E-01 3 .49E-01

% of limit is located in the Radiological I mpact to Man Table

Plant: River Bend Nuclear Station I Year: 2022 I Page 13 of 70 Annual Radioactive Effluent Release Report Table 2, Gaseous Effluents - Ground Level Release - Continuous Mode Radionuclide Unit Quarter 1 Quarter 2 Quarter 3 Quarter 4 Total Released Fission Gases Xe-1 33 Ci 6.81 E-01 4 .52E-02 0.00E+00 0.00E+00 7.26E-01 Xe-1 35m Ci 1 .94E+00 1 .93E+00 2.50E+00 1 .43E+00 7.80E+00 Xe-1 35 Ci 2.03E+00 1 . 1 6E+00 1 .43E+00 2.43E+00 7.05E+00 Total For Period Ci 4.65E+00 3.1 4E+00 3.93E+00 3.86E+00 1 .56E+01 Iodines 1-1 31 Ci 6. 1 0E-05 8.23E-05 5.87E-05 2.1 2E-05 2.23E-04 1-1 33 Ci 6.44E-05 6.71 E-05 1 .69E-05 4.21 E-06 1 .53E-04 Total For Period Ci 1 .25E-04 1 .49E-04 7.56E-05 2.54E-05 3.76E-04 Particulates Co-60 Ci 0.00E+00 2.41 E-06 0.00E+00 0.00E+00 2.41 E-06 Total For Period Ci 0.00E+00 2.41 E-06 0.00E+00 0.00E+00 2.41 E-06 Tritium H-3 Ci 1 .75E-01 9.97E-02 7.99E-01 3.92E-01 1 .47E+00 Total For Period Ci 1 .75E-01 9.97E-02 7.99E-01 3.92E-01 1 .47E+00

Plant: River Bend Nuclear Station I Year: 2022 I Page 14 of 70 Annual Radioactive Effluent Release Report Table 3, Gaseous Effluents - Mixed Mode Release - Continuous Mode Radionuclide Unit Quarter 1 Quarter 2 Quarter 3 Quarter 4 Total Released Fission Gases ."

Kr-85m Ci 1 . 1 5E+00 1 .64E+00 1 . 1 1 E+00 6.60E-01 4.56E+O0 Kr-88 Ci 1 .94E-01 7.67E-01 0.00E+00 0.00E+00 9.60E-01 Xe-1 33 Ci 3.00E-02 3.81 E-02 5.41 E-02 2.85E-02 1 .51 E-01 Xe-1 35 Ci 3. 1 1 E+00 3.74E+00 2.66E+01 2.83E+01 6.1 8E+01 Total For Period Ci 4.49E+00 6. 1 9E+00 2.78E+01 2.90E+01 6.75E+01 Iodines 1-1 31 Ci 2.48E-03 2.00E-03 2.20E-03 2.45E-03 9. 1 3E-03 1-1 33 Ci 2.39E-02 2.03E-02 2.02E-02 2.48E-02 8.92E-02 Total For Period Ci 2.64E-02 2.23E-02 2.24E-02 2.73E-02 9.83E-02 Particulates Sr-89 Ci 6.96E-05 4.1 3E-05 5.02E-05 1 . 1 9E-04 2.B0E-04 Ba-1 40 Ci 1 .62E-05 4.95E-06 1 .61 E-05 5.20E-05 8.92E-05 La-1 40 Ci 0.00E+00 1 .53E-04 0.00E+00 0.00E+00 1 .53E-04 Total For Period Ci 8.57E-05 1 .99E-04 6.62E-05 1 .71 E-04 5.22E-04 Tritium H-3 Ci 1 .67E+00 2.02E+00 1 .69E+00 2.31 E+00 7.68E+O0 Total For Period Ci 1 .67E+00 2.02E+00 1 .69E+00 2.31 E+00 7.68E+O0

Plant: River Bend Nuclear Station I Vear: 2022 I Page 15 of 70 Annual Radioactive Effluent Release Report Table 4, Radioactive Gaseous Waste Sampling and Analysis Program Minimum Lower Limit of Gaseous Release Sampling Type of Activity Analysis Detection (LLD)

Type Frequency Analysis Frequency uC/ml Principle Gamma M 1 .00E-04 Main Plant Exhaust Emitters M

Duct Grab Sample H-3 1 .00E-06 Principle Gamma Fuel Building M 1 .00E-04 Emitters Ventilation Exhaust M Duct Grab Sample H-3 1 .00E-06 Principle Gamma Radwaste Building M 1 .00E-04 Emitters Ventilation Exhaust M Duct Grab Sample H-3 1 .00E-06 All Release Types w 1-1 31 1 .00E-1 2 Continuous as listed above Charcoal Sample 1-1 33 1 .00E-1 0 w Principle Gamma Continuous Emitters (l- 1 31 , 1 .00E-1 1 Particulate Sample Others)

M Continuous Composite Gross Alpha 1 .00E-1 1 Particulate Sample a

Continuous Composite Sr-89, Sr-90 1 .00E-1 1 Particulate Sample Noble Gases Continuous Noble Gas Monitor Gross Beta or 1 .00E-6 Gamma 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 I Year: 2022 I Page 1 6 of 70 Annual Radioactive Effluent Release Reoort 4.0 LIQUID EFFLUENTS 4.1 Liquid Effluent and Waste Disposal Report Table 5, Liquid Effluents-Summation of All Releases Quarter Quarter Quarter Quarter A Fission & Activation Products Unit 1 Annual 2 3 4

1. Total Release (not including tritium, 2.48E-04 1 .25E-03 1 .56E-03 2.05E-03 5 . 1 0 E-03 Ci gases or alpha)

2. Average diluted concentration during 1 .68E- 1 0 8.1 8E-1 0 1 . 1 0E-09 1 .44E-09 8.73E-1 0

µCi/ml period B. Tritium

1. Total Release Ci 2.78E+00 8.32E+00 8.83E+00 5.54E+00 2.55E+01

2. Average diluted concentration during µCi/ml 1 .88E-06 5.47E-06 6.26E-06 3.88E-06 4.36E-06 period.

C. Dissolved & Entrained Gases

1. Total Release Ci 1 .23E-02 2.50E-02 2.26E-02 1 .05E-02 7.03E-02

2. Average diluted concentration during 8.30E-09 1 .64E-08 1 .60E-08 7.35E-09 1 .20E-08

µCi/ml period I I I I I I D. Gross Alpha Activity

1. Total Release Ci O.OE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO E. Volume Of Waste Released (prior 1 .24E+06 3.39E+06 4.37E+06 2.55E+06 1 . 1 5E+07 Liters to dilution)

F. Volume Of Dilution Water Used During 1 .48E+09 1 .52E+09 1 .41 E+09 1 .43E+09 5.84E+09 Liters Period

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

Plant: River Bend Nuclear Station I Vear: 2022 I Page 1 7 of 70 Annual Radioactive Effluent Release Report Table 6, Liquid Effluents - Batch Release Radionuclide Unit Quarter 1 Quarter 2 Quarter 3 Quarter 4 Total Released Fission and Activation Products Na-24 Ci 1 .20E-05 0.00E+00 0.00E+00 0.00E+00 1 .20E*05 Cr-51 Ci 0.00E+00 0.00E+00 0.00E+00 4.35E-06 4.35E-06 Mn-54 Ci 1 .71 E-06 4.25E-06 3.06E-06 4.65E-06 1 .37E-05 Fe-59 Ci 0.00E+00 0.00E+00 1 .72E-06 0.00E+00 1 .72E*06 Co-58 Ci 0.00E+00 0.00E+00 0.00E+00 1 .3 1 E-06 1 .31 E-06 Co-60 Ci 2.20E-04 1 .24E-03 1 .54E-03 1 .96E-03 4.96E-03 Zn-65 Ci 0.00E+00 2.42E-06 4.28E-06 0.00E+00 6.70E-06 Zr-95 Ci 0.00E+00 0.00E+00 5.87E-07 0.00E+00 5.87E*07 Nb-97 Ci 0.00E+00 0.00E+00 0.00E+00 1 .87E-06 1 .87E-06 Mo-99 Ci 1 . 1 4E*05 0.00E+00 0.00E+00 0.00E+00 1 . 1 4E-05 Tc-99m Ci 1 .56E-06 0.00E+00 0.00E+00 O.0OE+O0 1 .56E-06 Ag-1 1 0m Ci 0.00E+00 0.00E+00 0.00E+00 4.1 1 E-06 4.1 1 E-06 Rh-1 05 Ci 0.00E+00 0.00E+00 0.00E+00 2.29E-06 2.29E*06 Sb- 1 24 Ci O.00E+0O 4.06E-07 0.0OE+O0 O.OOE+00 4.06E-07 Sb-1 25 Ci 0.00E+00 0.00E+00 0.00E+00 5.24E-06 5.24E-06 Sb- 1 27 Ci 0.00E+00 0.00E+00 0.00E+00 1 . 1 0E-06 1 . 1 0E-06 1-1 31 Ci 1 .05E*06 6.25E-07 1 .34E-06 8.45E-06 1 . 1 5E-05 1-1 33 Ci 0.00E+00 0.00E+00 0.00E+00 4.60E-06 4.60E*06 Cs-1 34 Ci 4.90E-07 0.00E+00 0.00E+00 0.00E+00 4.90E-07 Cs-1 37 Ci 0.00E+0O 1 .20E-06 0.00E+00 0.00E+00 1 .20E-06 Ba- 1 40 Ci 0.00E+00 0.00E+00 0.00E+00 1 .3 1 E-06 1 .3 1 E-06 La- 1 40 Ci 0.00E+00 0.00E+00 1 .62E-06 3.49E-05 3.65E-05 Ce-1 4 1 Ci 0.00E+00 0.00E+00 0.00E+00 8.0SE-06 8.0SE-06 Np-238 Ci 0.00E+00 0.00E+00 0.00E+00 4.05E-06 4.05E-06 Total For Period Ci 2.48E-04 1 .25E-03 1 .56E-03 2.0SE-03 5.1 0 E-03

Plant: River Bend Nuclear Station I Year: 2022 I Page 1 8 of 70 Annual Radioactive Effluent Release Report Table 6, Liquid Effluents - Batch Release Tritium H-3 Ci 2.78E+00 8.32E+00 8.83E+00 5.54E+00 2.55E+01 Total For Period Ci 2.78E+00 8.32E+00 8.83E+00 5.54E+00 2.55E+01 Radionuclide Unit Quarter 1 Quarter 2 Quarter 3 Quarter 4 Total Released Dissolved and Entrained Gases Kr-85 Ci 0.00E+00 2.03E-04 7.48E-05 0.00E+00 2.78E-04 Kr-88 Ci 6.06E-06 4.01 E-05 0.00E+00 0.00E+00 4.62E-05 Xe-1 33m Ci 1 .28E-04 3.60E-04 2.25E-04 2.03E-04 9 . 1 6 E-04 Xe-1 33 Ci 3.89E-03 1 .02E-02 8.99E-03 6.34E-03 2.94E-02 Xe-1 35 Ci 8.25E-03 1 .42E-02 1 .33E-02 3.95E-03 3.97E-02 Total For Period Ci 1 .23E-02 2.50E-02 2.26E-02 1 .05E-02 7.03E-02

Plant: River Bend Nuclear Station I Vear: 2022 I Page 19 of 70 Annual Radioactive Effluent Release Report Table 7, Supplemental Information for Liquid Effluents - Batch Mode Report for 2022 Units Quarter 1 Quarter 2 Quarter 3 Quarter 4 Year Number of releases 24 56 73 37 1 90 Total Release Time minutes 7.03E+03 1 .73E+04 2.26E+04 1 .26E+04 5.95E+04 Maximum Release Time minutes 4.07E+02 8.90E+02 1 . 1 5E+03 1 .92E+03 1 .92 E+03 Average Release Time minutes 2.93E+02 3.08E+02 3.1 0E+02 3.41 E+02 3. 1 3E+02 Minimum Release Time minutes 6.00E+01 1 .76E+02 2 . 1 4 E+02 2.35E+02 6.00E+01 Units Quarter 1 Quarter 2 Quarter 3 Quarter 4 Average Mississippi River stream flow during periods of release into ft3/sec 660,036 748, 1 31 273,534 205, 1 46 a flowing stream

Plant: River Bend Nuclear Station I Year: 2022 I Page 20 of 70 Annual Radioactive Effluent Release Report Table 8, Radioactive Liquid Waste Sampling and Analysis Program Minimum Lower Limit of Liquid Release Sampling Type of Activity Analysis Detection (LLD)

Type Frequency Analysis Frequency uC/ml Principle Gamma 5.00E-07 Batch Waste p p Emitters; except Release (Liquid 5.00E-06 Ce-1 44 Radwaste Recovery Each Batch Each Batch Sample Tanks) 1-1 31 1 .00E-06 p Dissolved and M Entrained Gases 1 .00E-05 Each Batch / M (Gamma Emitters) p M H-3 1 .00E-05 Each Batch Composite Gross Alpha 1 .00E-07 p a Sr-89, Sr-90 5.00E-8 Each Batch Composite 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 I Year: 2022 I Page 21 of 70 Annual Radioactive Effluent Release Report 5.0 SOLID WASTE

SUMMARY

5.1 Solid Waste Shipped Offsite for Burial or Disposal (Not Irradiated Fuell 5.1 .1 Types of Waste Table 9, Types of Solid Waste Summary Types of Waste Total Quantity Total Activity Est. Total (m3 ) (Ci) Error (%)

a. Spent resins, filter sludges, evaporator bottoms, etc. 7.74E+01 9.61 E+01 25

b. Dry compressible waste, contaminated equip, etc. 3.79E+02 1 .44E-01 25

c. I rradiated components, control rods, etc. 5.78E-02 4.73E+00 25

d. Other (Water, EHC, Waste Oil, etc.) 2.08E+01 1 .43E-02 25 5.1.2 Estimate of major nuclide composition (by waste type) only > 1 % [Note 1 1 are reported.

Table 1 0, Major Nuclides Major Nuclide Composition Isotope  % Curies Mn-54 1 .64% 1 .58E+00 Fe-55 42.96% 4.1 3E+01 Co-60 41 . 1 8% 3.96E+01 Zn-65 1 .88% 1 .81 E+00

a. Resins, filters, evaporator bottoms, etc. Sr-90 1 . 1 4% 1 .1 0E+00 Ag-1 1 0m 1 .26% 1 .21 E+00 Sb- 1 25 1 .92% 1 .84E+00 Cs-1 34 3. 1 6% 3.04E+00 Cs-1 37 2.65% 2.55E+00

Plant: River Bend Nuclear Station I Year: 2022 I Page 22 of 70 Annual Radioactive Effluent Release Report Table 10, Major Nuclides Major Nuclide Composition Isotope  % Curies Mn-54 1 .47% 2.1 1 E-03 Fe-55 40.66% 5.85E-02 Co-60 49.70% 7.1 5E-02

b. Dry compressible waste, contaminated Ni-63 1 .61 % 2.31 E-03 equip, etc.

Zn-65 1 .51 % 2 . 1 7E-03 Sr-90 1 .25% 1 .B0E-03 Ce-1 41 1 .62% 2.33E-03 Fe-55 9.08% 4.30E-01

c. Irradiated components, control rods, etc. Co-60 56.09% 2.65E+00 Ni-63 33.99% 1 .61 E+00 Mn-54 1 .46% 2.0SE-04 Fe-55 40.51 % 5.79 E-03 Co-60 49.52% 7.0BE-03

d. Other (Water, EHC, Waste Oil, Etc.) Ni-63 1 .60% 2.29E-04 Zn-65 1 .50% 2 . 1 5 E-04 Sr-90 1 .25% 1 .78E-04 Ce-1 41 1 .66% 2.37E-04 Determined by Measurement & Correlation.

Packaged in Strong, Tight Liners.

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.

Plant: River Bend Nuclear Station I Year: 2022 I Page 23 of 70 Annual Radioactive Effluent Release Report 5.1 .3 Solid Waste Disposition Table 11, Solid Waste Disposition (Specify Site or Unit)

Number of Mode of Transportation Destination Shipments 26 Truck Energy Solutions (Bear Creek) - Oak Ridge, TN Table 12, Irradiated Fuel Shipments Disposition No I rradiated Fuel Shipments for 2022 Number of Mode of Transportation Destination Shipments N/A N/A N/A

Plant: River Bend Nuclear Station I Year: 2022 I Page 24 of 70 Annual Radioactive Effluent Release Report 6.0 RADIOLOGICAL IMPACT TO MAN 6.1 10CFR Part50, Appendix I Evaluation Table 13, Dose Assessment Quarter 1 Quarter 2 Quarter 3 Quarter 4 Annual Liquid Effluent Dose Limit, 1 .5 mrem 1 .5 mrem 1 .5 mrem 1 .5 mrem 3 mrem Total Body Total Body Dose 8.30E-07 6.31 E-06 9.1 2E-06 4.27E-06 1 .82E-05

% of Limit 5.53E-05 4.21 E-04 6.0SE-04 2.84E-04 6.06E-04 Liquid Effluent Dose Limit, 5 mrem 5 mrem 5 mrem 5 mrem 1 0 mrem Any Organ Maximum Organ Dose 2.40E-06 2 .42E-05 3.90E-05 2.79E-05 8.39E-05

% of Limit 4.79E-05 4.85E-04 7.S0E-04 5.58E-04 8.39E-04 Gaseous Effluent Dose 5 mrad 5 mrad 5 mrad 5 mrad 1 0 mrad Limit, Gamma Air Gamma Air Dose 1 .53E-02 1 .39E-02 2.04E-02 1 .84E-02 6.SOE-02

% of Limit 3.06E-01 2.77E-01 4.07E-01 3.69E-01 6.SOE-01 Gaseous Effluent Dose 1 0 mrad 1 0 mrad 1 0 mrad 1 0 mrad 20 mrad Limit, Beta Air Beta Air Dose 1 .06E-02 7.33E-03 1 .43E-02 1 .68E-02 4.91 E-02

% of Limit 1 .06E-01 7.33E-02 1 .43E-01 1 .68E-01 2.45E-01 Gaseous Effluent Organ Dose Limit (Iodine, 7.5 mrem 7.5 mrem 7.5 mrem 7.5 mrem 1 5 mrem Tritium, Particulates with >

8 day half-life)

Gaseous Effluent Organ Dose (Iodine, Tritium, 1 .0BE-01 9.22E-02 9.BBE-02 1 .05E-01 4.04E-01 Particulates with > 8 day half-life)

% of Limit 1 .45E+00 1 .23E+00 1 .32E+00 1 .40E+00 2.70E+00

Plant: River Bend Nuclear Station I Year: 2022 I Page 25 of 70 Annual Radioactive Effluent Release Report Table 13, Dose Assessment (continued)

Quarter 1 Quarter 2 Quarter 3 Quarter 4 Annual Gaseous Effluent Organ Dose Limit (Carbon-1 4 - 7.5 mrem 7.5 mrem 7.5 mrem 7.5 mrem 1 5 mrem Bounding Calculation)

Gaseous Effluent Organ Dose (Carbon-1 4 - 1 . 1 7E+00 1 .1 7E+00 1 .1 8E+00 1 . 1 8E+00 4.70E+00 Bounding Calculation)

% of Limit 1 .56E+01 1 .56E+01 1 .58E+01 1 .58E+01 3.1 3E+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 201 9. The office is estimated to be occupied during normal work hours for 2000 hours0.0231 days <br />0.556 hours <br />0.00331 weeks <br />7.61e-4 months <br /> 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.

Annual Critical Annual Total Annual Skin Annual Location Organ Dose Body Dose Dose (mrem) Duration Factor (mrem) (mrem)

Alligator Bayou 3.01 E-05 1 .75E-06 1 .26E-07 4.57E-03 Deer Hunters 1 . 1 5E-03 1 . 1 3E-04 1 .08E-05 2.92E-02 Onsite RV Park 2.68E-03 2.64E-04 2.52E-05 6.82E-02 WFPSO Building 8.99E-03 8.83E-04 8.43E-05 2.28E-01

Plant: River Bend Nuclear Station I Year: 2022 I Page 26 of 70 Annual Radioactive Effluent Release Report 6.3 40CFR Part 1 90 Evaluation for an Individual in the Unrestricted Area An assessment (see Table 1 4) 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 1 4, EPA 40 CFR PART 1 90 Evaluation Total Body Thyroid Any Other Organ Dose Limit 25 mrem 75 mrem 25 mrem Dose (Excluding C-1 4) 7.51 E-02 4.68E-01 7.65E-02

% of Limit 3.00E-01 6.24E-01 3.06E-01 Dose (Including C-1 4) 1 .0 1 E+00 1 .4 1 E+00 4.77E+00

% of Limit 4.06E+00 1 .88E+00 1 .91 E+01 Gaseous dose including a bounding calculation of C-1 4 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 1 90.

Plant: River Bend Nuclear Station I Year: 2022 I 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 2022 was 95%.

7.1 Joint Frequency Distributions All Stability Classes Period of Record: 01 /01 /2022 - 1 2/31 /2022 Elevation: Primary Sensors - 30 Foot Wind Speed (meters/second)

Wind 0.22- 0.5 1 - 0.76- 1 .1 - 1 .6- 2.1 - 3.1 - 5.1- 7.1 - 1 0. 1 - 1 3. 1 -

0.50 0.75 1 .0 1 .5 2.0 3.0 5.0 7.0 1 3.0 >1 8.0 Total Direction 1 0.0 1 8.0 N 77 62 1 26 1 42 1 07 1 43 58 1 0 0 0 0 716 NNE 66 55 67 1 52 89 78 23 2 0 0 0 0 532 NE 51 41 65 111 90 62 6 0 0 0 0 0 426 ENE 45 61 51 86 53 55 5 0 0 0 0 0 356 E 48 95 63 96 46 52 4 0 0 0 0 0 404 ESE 29 97 1 02 97 53 24 35 0 0 0 0 0 437 SE 39 81 1 37 21 1 1 27 1 40 41 2 0 0 0 0 778 SSE 26 51 62 1 54 1 26 1 68 1 37 2 0 0 0 0 726 s 26 53 77 1 20 129 1 55 94 2 0 0 0 0 656 SSW 30 45 47 85 76 124 16 0 0 0 0 0 423 SW 42 51 45 97 57 65 2 0 0 0 0 0 359 WSW 40 71 32 51 84 47 3 0 0 0 0 0 328 w 56 1 08 52 57 89 60 3 0 0 0 0 0 425 WNW 52 95 58 76 79 82 9 0 0 0 0 0 451 NW 76 85 71 88 99 1 25 34 1 0 0 0 0 579 NNW 94 76 1 10 1 09 63 145 1 22 5 0 0 0 0 724 TOTAL 797 1 1 27 1 1 65 1 732 1 367 1 525 592 15 0 0 0 0 8320 Number of Calms: 6 Number of Invalid Hours: 434 Number of Valid Hours: 8326 Total Hours for the Period: 8760

Plant : River Bend Nuclear Station I Year: 2022 I Page 28 of 70 Annual Radioactive Effluent Release Report Stability Class A Period of Record: 01 /01/2022 - 1 2/31 /2022 Elevation: Primary Sensors - 30 Foot Wind Speed (meters/second)

Wind 0.22- 0.5 1 - 0.76- 1.1- 1 .6- 2.1- 3. 1 - 5. 1 - 7. 1 - 1 0. 1 - 1 3. 1 -

>1 8.0 Total Direction 0.50 0.75 1 .0 1 .5 2.0 3.0 5.0 7.0 1 0.0 1 3.0 1 8.0 N 0 0 0 3 25 59 21 0 0 0 0 0 1 08 NNE 0 0 1 16 28 38 5 0 0 0 0 0 88 NE 0 0 1 5 35 22 1 0 0 0 0 0 64 ENE 0 0 1 13 32 36 2 0 0 0 0 0 84 E 0 0 0 17 19 22 4 0 0 0 0 0 62 ESE 0 1 2 16 16 7 15 0 0 0 0 0 57 SE 1 0 0 6 22 29 13 0 0 0 0 0 71 SSE 1 1 0 3 18 36 35 1 0 0 0 0 95 s 0 0 1 9 27 39 20 2 0 0 0 0 98 SSW 0 0 0 5 12 50 12 0 0 0 0 0 79 SW 0 0 0 7 20 38 1 0 0 0 0 0 66 WSW 0 0 0 9 55 34 1 0 0 0 0 0 99 w 0 0 0 6 63 51 3 0 0 0 0 0 1 23 WNW 0 0 0 7 30 44 3 0 0 0 0 0 84 NW 0 0 0 4 20 39 8 0 0 0 0 0 71 NNW 0 0 0 5 14 39 18 0 0 0 0 0 76 TOTAL 2 2 6 131 436 583 1 62 3 0 0 0 0 1 325 Number of Calms: 0 Number of Invalid Hours: 0 Number of Valid Hours: 1 325 Total Hours for the Period: 1325

Plant: River Bend Nuclear Station I Year: 2022 I Page 29 of 70 Annual Radioactive Effluent Release Report Stability Class B Period of Record: 0 1 /01 /2022 - 1 2/31 /2022 Elevation: Primary Sensors - 30 Foot Wind Speed (meters/second)

Wind 0.22- 0.5 1 - 0.76- 1.1- 1 .6- 2.1- 3. 1 - 5. 1 - 7. 1 - 1 0. 1 - 1 3. 1 -

>1 8.0 Total Direction 0.50 0.75 1 .0 1 .5 2.0 3.0 5.0 7.0 1 0.0 1 3.0 1 8.0 N 0 0 0 5 13 13 6 0 0 0 0 0 37 NNE 0 0 0 8 7 5 1 0 0 0 0 0 21 NE 0 0 1 8 5 15 1 0 0 0 0 0 30 ENE 0 0 0 4 6 10 1 0 0 0 0 0 21 E 0 0 1 8 6 8 0 0 0 0 0 0 23 ESE 0 0 0 7 1 6 3 0 0 0 0 0 17 SE 0 0 0 13 13 12 3 0 0 0 0 0 41 SSE 1 0 1 1 13 31 20 0 0 0 0 0 67 s 0 0 2 5 16 17 10 0 0 0 0 0 50 SSW 0 0 0 2 19 15 2 0 0 0 0 0 38 SW 0 0 1 11 13 3 0 0 0 0 0 0 28 WSW 0 0 0 9 14 5 0 0 0 0 0 0 28 w 0 0 0 10 14 3 0 0 0 0 0 0 27 WNW 0 0 1 9 10 2 0 0 0 0 0 0 22 NW 0 0 0 7 5 11 3 0 0 0 0 0 26 NNW 0 0 0 5 10 12 9 0 0 0 0 0 36 TOTAL 1 0 7 1 12 1 65 1 68 59 0 0 0 0 0 512 NUMBER OF CALMS: O NUMBER OF INVALID HOURS: O NUMBER OF VALID HOURS: 51 2 TOTAL HOURS FOR THE PERIOD: 512

Plant: River Bend Nuclear Station I Vear: 2022 I Page 30 of 70 Annual Radioactive Effluent Release Report Stability Class C Period of Record: 01 /0 1 /2022 - 1 2/31 /2022 Elevation: Primary Sensors - 30 Foot Wind Speed (meters/second)

Wind 0.22- 0.5 1 - 0.76- 1.1- 1 .6- 2. 1 - 3. 1 - 5. 1 - 7. 1 - 10.1- 1 3. 1 -

>1 8.0 Total Direction 0.50 0.75 1 .0 1 .5 2.0 3.0 5.0 7.0 1 0.0 1 3.0 1 8.0 N 0 0 0 9 7 16 5 0 0 0 0 0 37 NNE 0 0 2 8 5 4 1 0 0 0 0 0 20 NE 0 0 2 6 7 5 1 0 0 0 0 0 21 ENE 0 0 1 8 3 2 1 0 0 0 0 0 15 E 0 0 1 5 8 3 0 0 0 0 0 0 17 ESE 0 0 1 6 2 1 3 0 0 0 0 0 13 SE 0 0 1 10 6 7 4 0 0 0 0 0 28 SSE 0 0 0 12 7 12 21 0 0 0 0 0 52 s 0 0 1 4 6 18 10 0 0 0 0 0 39 SSW 0 0 0 4 12 14 1 0 0 0 0 0 31 SW 0 0 0 12 6 7 0 0 0 0 0 0 25 WSW 0 0 1 5 4 2 1 0 0 0 0 0 13 w 0 0 6 9 5 1 0 0 0 0 0 0 21 WNW 0 0 1 5 1 2 0 0 0 0 0 0 9 NW 0 0 0 7 8 8 1 0 0 0 0 0 24 NNW 0 0 0 4 4 6 11 0 0 0 0 0 25 TOTAL 0 0 17 114 91 1 08 60 0 0 0 0 0 390 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 390 TOTAL HOURS FOR THE PERIOD: 390

Plant: River Bend Nuclear Station I Year: 2022 I Page 31 of 70 Annual Radioactive Effluent Release Report Stability Class D Period of Record: 01/01/2022 - 12/31/2022 Elevation: Primary Sensors - 30 Foot Wind Speed (meters/second)

Wind 0.22- 0.5 1 - 0.76- 1 .1- 1 .6- 2. 1 - 3. 1 - 5. 1 - 7. 1 - 1 0. 1 - 1 3. 1 -

>1 8.0 Total Direction 0.50 0.75 1 .0 1 .5 2.0 3.0 5.0 7.0 1 0.0 1 3.0 1 8.0 N 0 1 13 47 33 45 26 1 0 0 0 0 1 66 NNE 0 2 9 39 28 25 14 2 0 0 0 0 119 NE 2 3 12 32 21 18 3 0 0 0 0 0 91 ENE 1 2 15 31 9 5 1 0 0 0 0 0 64 E 0 7 14 31 12 18 0 0 0 0 0 0 82 ESE 0 10 22 28 20 7 14 0 0 0 0 0 101 SE 0 5 25 67 46 72 21 2 0 0 0 0 238 SSE 1 4 10 39 54 76 59 1 0 0 0 0 244 s 1 3 10 35 43 73 52 0 0 0 0 0 217 SSW 0 2 8 40 24 42 1 0 0 0 0 0 117 SW 1 3 14 32 9 13 0 0 0 0 0 0 72 WSW 0 1 8 11 6 3 1 0 0 0 0 0 30 w 0 4 10 17 4 4 0 0 0 0 0 0 39 WNW 0 4 12 19 17 20 6 0 0 0 0 0 78 NW 0 3 6 23 29 52 21 1 0 0 0 0 1 35 NNW 0 0 10 27 25 77 84 5 0 0 0 0 228 TOTAL 6 54 1 98 518 380 550 303 12 0 0 0 0 202 1 NUMBER OF CALMS: 1 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 2022 TOTAL HOURS FOR THE PERIOD: 2022

Plant: River Bend Nuclear Station I Year: 2022 I Page 32 of 70 Annual Radioactive Effluent Release Report Stability Class E Period of Record: 01/01/2022 - 1 2/31 /2022 Elevation: Primary Sensors - 30 Foot Wind Speed (meters/second)

Wind 0.22- 0.5 1 - 0.76- 1 .1 - 1 .6- 2.1- 3. 1 - 5. 1 - 7. 1 - 1 0. 1 - 1 3. 1 -

>1 8.0 Total Direction 0.50 0.75 1 .0 1 .5 2.0 3.0 5.0 7.0 1 0.0 1 3.0 1 8.0 N 6 20 49 50 28 10 0 0 0 0 0 0 1 63 NNE 7 21 25 67 20 5 2 0 0 0 0 0 1 47 NE 13 15 23 44 14 1 0 0 0 0 0 0 1 10 ENE 14 21 24 24 3 2 0 0 0 0 0 0 88 E 7 40 38 32 1 1 0 0 0 0 0 0 1 19 ESE 7 38 56 35 13 3 0 0 0 0 0 0 1 52 SE 10 40 85 1 02 37 20 0 0 0 0 0 0 294 SSE 4 19 38 87 32 12 2 0 0 0 0 0 1 94 s 2 20 43 59 36 8 2 0 0 0 0 0 1 70 SSW 2 18 27 32 9 2 0 0 0 0 0 0 90 SW 5 17 16 32 9 4 1 0 0 0 0 0 84 WSW 4 20 8 14 5 2 0 0 0 0 0 0 53 w 10 26 15 11 3 1 0 0 0 0 0 0 66 WNW 6 16 25 29 21 14 0 0 0 0 0 0 111 NW 8 15 36 35 35 15 1 0 0 0 0 0 1 45 NNW 5 17 37 38 10 11 0 0 0 0 0 0 1 18 TOTAL 1 10 363 545 691 276 111 8 0 0 0 0 0 2 1 04 NUMBER OF CALMS: 2 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 21 06 TOTAL HOURS FOR THE PERIOD: 21 06

Plant: River Bend Nuclear Station I Year: 2022 I Page 33 of 70 Annual Radioactive Effluent Release Report Stability Class F Period of Record: 01/01/2022 - 12/31/2022 Elevation: Primary Sensors - 30 Foot Wind Speed (meters/second)

Wind 0.22* 0.51

• 0.76- 1 .1- 1 .6- 2.1- 3. 1 - 5. 1 - 7. 1 - 1 0. 1 - 1 3. 1 -

>1 8.0 Total Direction 0.50 0.75 1 .0 1 .5 2.0 3.0 5.0 7.0 1 0.0 1 3.0 1 8.0 N 16 13 37 18 1 0 0 0 0 0 0 0 85 NNE 20 13 25 14 1 1 0 0 0 0 0 0 74 NE 10 12 22 14 8 1 0 0 0 0 0 0 67 ENE 14 13 8 6 0 0 0 0 0 0 0 0 41 E 17 14 5 3 0 0 0 0 0 0 0 0 39 ESE 12 23 15 4 1 0 0 0 0 0 0 0 55 SE 16 25 20 13 3 0 0 0 0 0 0 0 77 SSE 5 17 12 10 2 1 0 0 0 0 0 0 47 s 6 14 15 7 1 0 0 0 0 0 0 0 43 SSW 3 10 11 2 0 1 0 0 0 0 0 0 27 SW 6 18 10 3 0 0 0 0 0 0 0 0 37 WSW 7 19 6 2 0 1 0 0 0 0 0 0 35 w 18 31 12 3 0 0 0 0 0 0 0 0 64 WNW 20 24 13 6 0 0 0 0 0 0 0 0 63 NW 21 19 18 11 2 0 0 0 0 0 0 0 71 NNW 24 21 27 18 0 0 0 0 0 0 0 0 90 TOTAL 215 286 256 1 34 19 5 0 0 0 0 0 0 915 NUMBER OF CALMS: 1 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 916 TOTAL HOURS FOR THE PERIOD: 91 6

Plant: River Bend Nuclear Station I Year: 2022 I Page 34 of 70 Annual Radioactive Effluent Release Report Stability Class G Period of Record: 01/01/2022 - 12/31/2022 Elevation: Primary Sensors - 30 Foot Wind Speed (meters/second)

Wind 0.22- 0.5 1 - 0.76- 1 .1- 1 .6- 2.1 - 3.1 - 5. 1 - 7. 1 - 1 0. 1 - 1 3.1 -

> 1 8.0 Total Direction 0.50 0.75 1 .0 1 .5 2.0 3.0 5.0 7.0 1 0.0 1 3.0 1 8.0 N 55 28 27 10 0 0 0 0 0 0 0 0 1 20 NNE 39 19 5 0 0 0 0 0 0 0 0 0 63 NE 26 11 4 2 0 0 0 0 0 0 0 0 43 ENE 16 25 2 0 0 0 0 0 0 0 0 0 43 E 24 34 4 0 0 0 0 0 0 0 0 0 62 ESE 10 25 6 1 0 0 0 0 0 0 0 0 42 SE 12 11 6 0 0 0 0 0 0 0 0 0 29 SSE 14 10 1 2 0 0 0 0 0 0 0 0 27 s 17 16 5 1 0 0 0 0 0 0 0 0 39 SSW 25 15 1 0 0 0 0 0 0 0 0 0 41 SW 30 13 4 0 0 0 0 0 0 0 0 0 47 WSW 29 31 9 1 0 0 0 0 0 0 0 0 70 w 28 47 9 1 0 0 0 0 0 0 0 0 85 WNW 26 51 6 1 0 0 0 0 0 0 0 0 84 NW 47 48 11 1 0 0 0 0 0 0 0 0 1 07 NNW 65 38 36 12 0 0 0 0 0 0 0 0 151 TOTAL 463 422 1 36 32 0 0 0 0 0 0 0 0 1 053 NUMBER OF CALMS: 2 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 1055 TOTAL HOURS FOR THE PERIOD: 1 055

Plant: River Bend Nuclear Station I Year: 2022 I Page 35 of 70 Annual Radioactive Effluent Release Report All Stability Classes Period of Record: 0 1 /01 /2022 - 1 2/31 /2022 Elevation: Primary Sensors - 1 50 Foot Wind Speed (meters/second)

Wind 0.22- 0.5 1 - 0.76- 1 .1 - 1 .6- 2. 1 - 3. 1 - 5. 1 - 7.1 - 10. 1 - 1 3. 1 -

>1 8.0 Total Direction 0.50 0.75 1 .0 1 .5 2.0 3.0 5.0 7.0 1 0.0 1 3.0 1 8.0 N 1 3 7 29 53 1 98 232 46 1 0 0 0 570 NNE 0 4 8 41 80 287 232 24 3 0 0 0 679 NE 0 2 10 44 79 213 1 60 12 0 0 0 0 520 ENE 0 2 13 44 88 230 1 96 19 0 0 0 0 592 E 0 3 12 43 89 1 63 74 25 0 0 0 0 409 ESE 0 4 4 44 80 248 307 58 10 0 0 0 755 SE 2 1 9 25 63 216 239 39 7 0 0 0 601 SSE 0 1 1 33 63 212 224 65 7 0 0 0 606 s 0 1 4 31 63 241 295 38 3 0 0 0 676 SSW 3 4 6 37 75 244 209 5 0 0 0 0 583 SW 1 0 5 25 53 1 35 80 3 0 0 0 0 302 WSW 1 2 7 44 55 1 51 55 5 0 0 0 0 320 w 0 2 11 51 89 209 57 12 5 0 0 0 436 WNW 1 2 10 25 38 115 1 88 61 10 0 0 0 450 NW 2 1 4 21 24 1 22 1 28 29 5 0 0 0 336 NNW 1 1 7 19 36 1 28 1 73 96 7 0 0 0 468 TOTAL 12 33 1 18 556 1 028 31 1 2 2849 537 58 0 0 0 8303 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 457 NUMBER OF VALID HOURS: 8303 TOTAL HOURS FOR THE PERIOD: 8760

Plant: River Bend Nuclear Station I Year: 2022 I Page 36 of 70 Annual Radioactive Effluent Release Report Stability Class A Period of Record: 01/01/2022 - 12/31/2022 Elevation: Primary Sensors - 150 Foot Wind Speed (meters/second)

Wind 0.22- 0.5 1 - 0.76- 1 .1- 1 .6- 2.1- 3. 1 - 5. 1 - 7. 1 - 1 0. 1 - 1 3. 1 -

Direction 0.50 0.75 1 .0 1 .5 2.0 3.0 5.0 7.0 1 0.0 1 3.0 1 8.0

>1 8.0 Total N 0 0 0 0 4 37 36 6 0 0 0 0 83 NNE 0 0 0 1 16 34 44 5 0 0 0 0 1 00 NE 0 0 0 5 6 30 28 2 0 0 0 0 71 ENE 0 0 0 2 7 56 60 2 0 0 0 0 1 27 E 0 0 0 3 6 27 28 10 0 0 0 0 74 ESE 0 0 0 2 7 13 25 11 3 0 0 0 61 SE 0 0 0 3 1 17 27 7 0 0 0 0 55 SSE 0 0 0 1 3 20 31 17 3 0 0 0 75 s 0 0 0 1 4 33 54 2 1 0 0 0 95 SSW 0 0 0 0 7 23 57 0 0 0 0 0 87 SW 0 0 0 3 7 26 20 1 0 0 0 0 57 WSW 0 0 0 0 12 58 25 1 0 0 0 0 96 w 0 0 0 2 18 97 26 2 0 0 0 0 1 45 WNW 0 0 0 3 3 41 26 4 2 0 0 0 79 NW 0 0 0 0 5 26 22 3 0 0 0 0 56 NNW 0 0 0 0 5 24 21 12 0 0 0 0 62 TOTAL 0 0 0 26 111 562 530 85 9 0 0 0 1 323 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 1323 TOTAL HOURS FOR THE PERIOD: 1323

Plant: River Bend Nuclear Station I Year: 2022 I Page 37 of 70 Annual Radioactive Effluent Release Report Stability Class B Period of Record: 01 /01 /2022 - 1 2/31/2022 Elevation: Primary Sensors - 1 50 Foot Wind Speed (meters/second)

Wind 0.22- 0.5 1 - 0.76- 1.1- 1 .6- 2.1 - 3. 1 - 5. 1 - 7. 1 - 1 0. 1 - 1 3. 1 -

>1 8.0 Total Direction 0.50 0.75 1 .0 1 .5 2.0 3.0 5.0 7.0 1 0.0 1 3.0 1 8.0 N 0 0 0 3 4 6 7 6 0 0 0 0 26 NNE 0 0 0 3 4 18 12 1 0 0 0 0 38 NE 0 0 0 5 5 14 7 0 0 0 0 0 31 ENE 0 0 0 2 2 12 12 1 0 0 0 0 29 E 0 0 0 2 4 11 4 1 0 0 0 0 22 ESE 0 0 0 2 3 12 9 4 1 0 0 0 31 SE 0 0 0 0 2 11 13 1 0 0 0 0 27 SSE 0 0 0 3 1 17 30 6 0 0 0 0 57 s 0 0 0 1 5 22 22 4 0 0 0 0 54 SSW 0 0 0 1 6 22 12 0 0 0 0 0 41 SW 0 0 0 2 5 14 3 1 0 0 0 0 25 WSW 0 0 0 7 6 11 2 0 0 0 0 0 26 w 0 0 0 8 10 21 1 0 0 0 0 0 40 WNW 0 0 0 2 4 7 5 5 0 0 0 0 23 NW 0 0 0 1 2 6 11 2 0 0 0 0 22 NNW 0 0 0 0 2 4 10 3 1 0 0 0 20 TOTAL 0 0 0 42 65 208 1 60 35 2 0 0 0 512 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: O NUMBER OF VALID HOURS: 51 2 TOTAL HOURS FOR THE PERIOD: 5 1 2

Plant: River Bend Nuclear Station I Year: 2022 I Page 38 of 70 Annual Radioactive Effluent Release Report Stability Class C Period of Record: 01 /01 /2022 - 1 2/31 /2022 Elevation: Primary Sensors - 1 50 Foot Wind Speed (meters/second)

Wind 0.22- 0.51 - 0.76- 1 .1- 1 .6- 2.1 - 3. 1 - 5. 1 - 7. 1 - 1 0. 1 - 1 3. 1 -

> 1 8.0 Total Direction 0.50 0.75 1 .0 1 .5 2.0 3.0 5.0 7.0 1 0.0 1 3.0 1 8.0 N 0 0 0 1 5 15 8 6 0 0 0 0 35 NNE 0 0 0 5 2 7 8 1 0 0 0 0 23 NE 0 0 0 1 5 7 6 1 0 0 0 0 20 ENE 0 0 0 2 9 13 5 1 0 0 0 0 30 E 0 0 1 1 4 6 1 1 0 0 0 0 14 ESE 0 0 0 4 3 4 4 2 1 0 0 0 18 SE 0 0 0 1 4 6 10 1 1 0 0 0 23 SSE 0 0 0 1 3 10 22 10 0 0 0 0 46 s 0 0 0 2 4 5 20 5 0 0 0 0 36 SSW 0 0 0 3 3 12 17 0 0 0 0 0 35 SW 0 0 0 0 4 10 5 0 0 0 0 0 19 WSW 0 1 1 1 6 5 3 0 0 0 0 0 17 w 0 0 1 7 4 5 2 0 0 0 0 0 19 WNW 0 0 0 3 1 3 5 2 0 0 0 0 14 NW 0 0 0 2 1 8 5 1 0 0 0 0 17 NNW 0 0 0 1 3 4 8 6 0 0 0 0 22 TOTAL 0 1 3 35 61 1 20 1 29 37 2 0 0 0 388 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 388 TOTAL HOURS FOR THE PERIOD: 388

Plant: River Bend Nuclear Station I Year: 2022 I Page 39 of 70 Annual Radioactive Effluent Release Report Stability Class D Period of Record: 01/01/2022 - 12/31/2022 Elevation: Primary Sensors - 150 Foot Wind Speed (meters/second)

Wind 0.22- 0.5 1 - 0.76- 1.1- 1 .6- 2. 1 - 3.1 - 5.1 - 7.1 - 1 0. 1 - 1 3. 1 -

> 1 8.0 Total Direction 0.50 0.75 1 .0 1 .5 2.0 3.0 5.0 7.0 1 0.0 1 3.0 1 8 .0 N 0 0 1 13 13 34 65 27 1 0 0 0 1 54 NNE 0 0 2 13 15 52 48 14 3 0 0 0 1 47 NE 0 0 1 7 14 34 24 4 0 0 0 0 84 ENE 0 0 4 3 16 29 37 8 0 0 0 0 97 E 0 1 1 7 16 20 14 9 0 0 0 0 68 ESE 0 1 2 11 24 43 75 29 5 0 0 0 1 90 SE 0 1 4 5 21 40 71 .26 6 0 0 0 1 74 SSE 0 1 0 9 14 46 93 32 3 0 0 0 1 98 s 0 0 2 8 19 55 1 06 24 2 0 0 0 216 SSW 1 0 3 15 16 50 61 4 0 0 0 0 1 50 SW 0 0 2 4 13 24 14 0 0 0 0 0 57 WSW 0 1 0 15 7 13 3 2 0 0 0 0 41 w 0 0 4 13 10 8 9 0 1 0 0 0 45 WNW 0 0 2 5 8 16 48 35 7 0 0 0 121 NW 0 0 2 8 2 16 30 19 4 0 0 0 81 NNW 0 0 2 4 5 18 87 71 6 0 0 0 1 93 TOTAL 1 5 32 1 40 213 498 785 304 38 0 0 0 201 6 NUMBER OF CALMS: O NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 201 6 TOTAL HOURS FOR THE PERIOD: 201 6

Plant: River Bend Nuclear Station I Year: 2022 I Page 40 of 70 Annual Radioactive Effluent Release Report Stability Class E Period of Record: 0 1 /01 /2022 - 1 2/31 /2022 Elevation: Primary Sensors - 150 Foot Wind Speed (meters/second)

Wind 0.22- 0.5 1 - 0.76- 1 .1 - 1 .6- 2.1 - 3. 1 - 5.1 - 7.1 - 1 0. 1 - 1 3.1 -

Direction 0.50 0.75 1 .0 1 .5 2.0 3.0 5.0 7.0 1 0.0 1 3.0 1 8.0

>1 8.0 Total N 1 1 2 4 8 43 46 1 0 0 0 0 1 06 NNE 0 3 3 5 21 80 59 3 0 0 0 0 1 74 NE 0 2 6 10 24 62 53 5 0 0 0 0 1 62 ENE 0 1 1 18 27 42 41 7 0 0 0 0 1 37 E 0 2 3 18 29 42 17 4 0 0 0 0 115 ESE 0 1 1 11 23 1 01 1 35 9 0 0 0 0 28 1 SE 1 0 1 9 16 73 80 4 0 0 0 0 1 84 SSE 0 0 1 5 21 68 32 0 1 0 0 0 1 28 s 0 0 0 4 9 72 73 3 0 0 0 0 161 SSW 0 1 1 8 18 92 53 1 0 0 0 0 1 74 SW 0 0 1 4 12 33 25 1 0 0 0 0 76 WSW 0 0 2 5 13 22 11 2 0 0 0 0 55 w 0 1 3 6 13 23 16 6 4 0 0 0 72 WNW 0 1 1 6 5 9 72 15 1 0 0 0 110 NW 0 0 1 3 4 18 48 3 1 0 0 0 78 NNW 0 0 2 8 6 31 30 4 0 0 0 0 81 TOTAL 2 13 29 1 24 249 81 1 791 68 7 0 0 0 2094 NUMBER OF CALMS: O NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 2094 TOTAL HOURS FOR THE PERIOD: 2094

Plant : River Bend Nuclear Station I Year: 2022 I Page 41 of 70 Annual Radioactive Effluent Release Report Stability Class F Period of Record: 01/01 /2022 - 12/31/2022 Elevation: Primary Sensors - 150 Foot Wind Speed (meters/second)

Wind 0.22- 0.5 1 - 0.76- 1.1- 1 .6- 2.1- 3. 1 - 5. 1 - 7. 1 - 10.1- 1 3. 1 -

>1 8.0 Total Direction 0.50 0.75 1 .0 1 .5 2.0 3.0 5.0 7.0 1 0.0 1 3.0 1 8.0 N 0 1 2 0 1 24 32 0 0 0 0 0 60 NNE 0 0 1 4 7 35 36 0 0 0 0 0 83 NE 0 0 1 7 9 30 35 0 0 0 0 0 82 ENE 0 0 1 5 11 24 32 0 0 0 0 0 73 E 0 0 2 6 13 12 4 0 0 0 0 0 37 ESE 0 0 0 10 12 37 42 3 0 0 0 0 1 04 SE 0 0 1 3 10 43 18 0 0 0 0 0 75 SSE 0 0 0 8 15 36 9 0 0 0 0 0 68 s 0 0 1 10 14 35 15 0 0 0 0 0 75 SSW 2 0 0 6 15 25 6 0 0 0 0 0 54 SW 1 0 1 3 4 6 6 0 0 0 0 0 21 WSW 0 0 1 5 3 21 6 0 0 0 0 0 36 w 0 1 1 1 9 29 2 3 0 0 0 0 46 WNW 0 1 2 3 7 11 17 0 0 0 0 0 41 NW 1 0 0 4 2 19 7 1 0 0 0 0 34 NNW 0 0 2 1 6 14 4 0 0 0 0 0 27 TOTAL 4 3 16 76 1 38 401 271 7 0 0 0 0 916 NUMBER OF CALMS: 9 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 916 TOTAL HOURS FOR THE PERIOD: 916

Plant: River Bend Nuclear Station I Year: 2022 I Page 42 of 70 Annual Radioactive Effluent Release Report Stability Class G Period of Record: 0 1 /01 /2022 - 1 2/31 /2022 Elevation: Primary Sensors - 1 50 Foot Wind Speed (meters/second)

Wind 0.22- 0.5 1 - 0.76- 1.1- 1 .6- 2. 1 - 3. 1 - 5. 1 - 7. 1 - 1 0. 1 - 1 3. 1 -

> 1 8.0 Total Direction 0.50 0.75 1 .0 1 .5 2.0 3.0 5.0 7.0 1 0.0 1 3.0 1 8.0 N 0 1 2 8 18 39 38 0 0 0 0 0 1 06 NNE 0 1 2 10 15 61 25 0 0 0 0 0 114 NE 0 0 2 9 16 36 7 0 0 0 0 0 70 ENE 0 1 7 12 16 54 9 0 0 0 0 0 99 E 0 0 5 6 17 45 6 0 0 0 0 0 79 ESE 0 2 1 4 8 38 17 0 0 0 0 0 70 SE 1 0 3 4 9 26 20 0 0 0 0 0 63 SSE 0 0 0 6 6 15 7 0 0 0 0 0 34 s 0 1 1 5 8 19 5 0 0 0 0 0 39 SSW 0 3 2 4 10 20 3 0 0 0 0 0 42 SW 0 0 1 9 8 22 7 0 0 0 0 0 47 WSW 1 0 3 11 8 21 5 0 0 0 0 0 49 w 0 0 2 14 25 26 1 1 0 0 0 0 69 WNW 1 0 5 3 10 28 15 0 0 0 0 0 62 NW 1 1 1 3 8 29 5 0 0 0 0 0 48 NNW 1 1 1 5 9 33 13 0 0 0 0 0 63 TOTAL 5 11 38 1 13 1 91 512 1 83 1 0 0 0 0 1 054 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 1054 TOTAL HOURS FOR THE PERIOD: 1 054

Plant: River Bend Nuclear Station I Vear: 2022 I Page 43 of 70 Annual Radioactive Effluent Release Report 7.2 Stability Class Table 1 5, Classification of Atmospheric Stability Hours Stability Condition Pasquill Categories (Percentage)

Extremely Unstable A 16 Moderately Stable B 6 Slightly Unstable C 5 Neutral D 24 Slightly Stable E 25 Moderately Stable F 11 Extremely Stable G 13 Table 1 6, Atmospheric Dispersion and Deposition Rates for the Maximum Individual Dose Calculations Analysis Location Ground Level Mixed Mode (meters) Releases Releases Gamma air dose (3) 994 m WNW (Containment) CHI/Q 42 1 .0 CHI/Q - 33. 1 and Beta Air Dose Maximum Receptor (4) 994 m WNW CHI/Q - 421 .0 CHl/O - 33. 1 Resident D/0 - 50.3 D/0 - 1 8.0 Garden Meat animal Immersion Milk animal (5) 7,000 m WNW CHl/O - 3.58 CHI/Q - .870 D/Q - 0.38 D/0 - .223 Other on-site 1 1 5 m ENE CHI/Q - 5977.0 CHl/O - 407.5 Receptors D/Q - 529.7 D/0 - 46. 9 275 m N CHI/Q - 1 644.0 CHI/Q - 1 69.1 D/0 - 345.6 D/0 - 68.4 2500 SW CHI/Q 34.45 CHI/Q - 4.65 D/Q - 3.35 D/0 - 1 .40 Notes:

( 1 ) All CH I/Q = 1 0-1 sec/m 3 (2) All D/Q = 1 o-9 m*2 (3) Maximum offsite location (property boundary) with highest CHl/0 (unoccupied).

(4) Maximum hypothetical occupied offsite location with highest CH I/Q and D/0.

(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-291 9, XOQDOQ, Computer Program for the Meteorological Evaluation of Routine Effluent Releases at Nuclear Power Stations

RBG-48220 I Rev. 2022 I Page 44 of 70 Annual Radioactive Effluent Release Report Attachment 1 Page 1 of 27 Groundwater Monitoring Well Sampling Results Table 1 7, Gamma Isotopic Results Station ID Sample Date Units MN-54 C0-58 FE-59 C0-60 ZN-65 NB-95 ZR-95 1-131 CS-134 CS-137 BA-1 40 LA-140 MW-1 00 2/1 /2022 pCi/L < 2.9E+00 < 3.2E+00 < 6.0E+00 < 3.1 E+00 < 6.4E+OO < 3.5E+00 < 5.4E+OO < 9.5E+OO < 3.2E+00 < 3.0E+OO < 2.1 E+01 < 7.4E+OO MW-124 2/1 /2022 pCi/L < 2.4E+OO < 2.6E+00 < 5.3E+OO < 2.2E+OO < 5. 1 E+00 < 2.7E+00 < 4.5E+OO < 8.7E+OO < 2.7E+00 < 2.5E+00 < 1 .9E+01 < 5.4E+00 MW-125 2/1 /2022 pCi/L < 2.4E+00 < 2.6E+00 < 5.4E+00 < 2.BE+00 < 5.4E+00 < 2.7E+00 < 4.BE+00 < 8.5E+00 < 2.6E+00 < 2.6E+00 < 1 .9E+01 < 6.0E+00 MW-126 2/1 /2022 pCi/L < 2.2E+00 < 2.3E+00 < 5.4E+00 < 2.2E+00 < 4.BE+00 < 2.4E+00 < 4.0E+00 < 7.1 E+00 < 2.4E+00 < 2.2E+00 < 1 .6E+01 < 5.BE+00 MW-1 42 2/1/2022 pCi/L < 2.9E+00 < 2.9E+00 < 6.3E+00 < 2.9E+00 < 5.9E+00 < 2.7E+OO < 5.6E+OO < 8.3E+00 < 2.BE+00 < 2.7E+OO < 1 .8E+01 < 6.2E+00 MW-142 2/1 /2022 pCi/L < 2.5E+OO < 2.BE+00 < 6.1 E+00 < 2.5E+00 < 4.BE+OO < 2.9E+00 < 4.BE+OO < 8.7E+OO < 3.1 E+00 < 2.BE+OO < 1 .9E+01 < 6.7E+OO MW-144 2/1 /2022 pCi/L < 2.2E+OO < 2.2E+00 < 4.9E+OO < 2.2E+OO < 4.4E+00 < 2.3E+OO < 4.3E+00 < 8.0E+00 < 2.4E+OO < 2.3E+00 < 1 .7E+01 < 5.5E+00 MW- 1 46 2/1 /2022 pCi/L < 4.0E+00 < 4.BE+00 < 9.BE+OO < 3.BE+OO < 9.3E+00 < 4.BE+OO < 8.2E+00 < 1 .5E+01 < 5.0E+00 < 4.2E+OO < 3.0E+01 < 7.4E+00 MW-147 2/1/2022 pCi/L < 2.1 E+00 < 2.3E+00 < 5.7E+00 < 2.2E+00 < 4.6E+00 < 2.7E+00 < 4.1 E+00 < 7.0E+00 < 2.5E+00 < 2.2E+00 < 1 .6E+01 < 5.3E+00 MW-148 2/1 /2022 pCi/L < 2.9E+00 < 2.9E+00 < 7.1 E+00 < 3.1 E+00 < 5.9E+00 < 3.1 E+00 < 5.7E+00 < 9.9E+00 < 3.4E+00 < 3.3E+00 < 2.1 E+01 < 7.4E+00 MW-151 2/1 /2022 pCi/L < 3.9E+00 < 4.5E+00 < 1 .1 E+01 < 4.1 E+OO < 9.7E+00 < 4.5E+OO < 7.BE+00 < 1 .4E+01 < 5.1E+00 < 4.5E+00 < 3.6E+01 < 1 .0E+01 MW-1 55 2/1 /2022 pCi/L < 4.6E+00 < 5.3E+00 < 1 .1 E+01 < 6.1 E+00 < 9.3E+OO < 4.9E+00 < 8.2E+OO < 1 .4E+01 < 4.9E+00 < 4.5E+OO < 3.0E+01 < 1.1 E+01 MW-156 2/1 /2022 pCi/L < 4.2E+OO < 4.3E+00 < 8.5E+00 < 4.5E+OO < 8.0E+00 < 4.4E+00 < 9.0E+O0 < 1 .2E+01 < 4.5E+OO < 4.7E+00 < 2.7E+01 < 1 .2E+01 MW-157 2/1/2022 pCi/L < 4.6E+00 < 4.0E+00 < 1 .0E+01 < 4.3E+OO < 1 . 1 E+01 < 5.3E+OO < 7.BE+00 < 1 .4E+01 < 4.9E+00 < 4.7E+00 < 3.2E+01 < 1 .3E+01 MW-158 2/1 /2022 pCi/L < 4.9E+00 < 5.3E+00 < 9.4E+00 < 4.BE+00 < 1 .0E+01 < 4.6E+00 < 8.9E+00 < 1 .5E+01 < 5.4E+00 < 4.5E+00 < 3.2E+01 < 6.4E+00 MW-159 2/1 /2022 pCi/L < 2.3E+00 < 2.7E+00 < 5.4E+00 < 2.3E+00 < 4.2E+00 < 2.7E+00 < 4.3E+00 < 8.BE+00 < 2.6E+00 < 2.5E+00 < 1 .9E+01 < 5.4E+00 MW-162 2/1/2022 pCi/L < 3.4E+00 < 3.5E+00 < 8.3E+00 < 3.7E+00 < 7.6E+00 < 4.4E+OO < 6. 1 E+OO < 1 .2E+01 < 3.BE+00 < 3.5E+OO < 2.7E+01 < 8.1 E+00

RBG-48220 I Rev. 2022 I Page 45 of 70 Annual Radioactive Effluent Release Report Attachment 1 Page 2 of 27 Groundwater Monitoring Well Sampling Results Table 1 7, Gamma Isotopic Results Station I D Sample Date Units MN-54 CO-58 FE-59 CO-60 ZN-65 NB-95 ZR-95 1-131 CS-134 CS-137 BA-1 40 LA-140 MW-1 64 2/1 /2022 pCi/L < 2.6E+00 < 3.1 E+00 < 6.0E+00 < 3.1 E+00 < 5.4E+00 < 2.9E+00 < 4.4E+00 < 9.3E+00 < 2.7E+00 < 2.7E+00 < 1 .8E+01 < 6.7E+00 MW-165 2/1 /2022 pCi/L < 4.2E+00 < 5.7E+00 < 9.BE+00 < 4.2E+00 < 9.2E+00 < 4.9E+00 < 9.0E+00 < 1 .4E+01 < 4.4E+00 < 4.BE+00 < 2.5E+01 < 1 .2E+01 MW-178 2/1/2022 pCi/L < 4.2E+00 < 4.7E+00 < 1 .2E+01 < 4.9E+00 < 8.6E+00 < 5.0E+00 < 8.6E+00 < 1 .4E+01 < 5.6E+00 < 4.5E+00 < 3.3E+01 < 1 .2E+01 MW-178 2/1 /2022 pCi/L < 4.BE+00 < 5.4E+00 < 9.3E+00 < 5.5E+00 < 9.1 E+00 < 5.4E+00 < 8.7E+00 < 1 .4E+01 < 5.7E+00 < 5.0E+00 < 3.1 E+01 < 1 .4E+01 MW-179 2/1 /2022 pCi/L < 4.5E+00 < 5.3E+00 < 1 .0E+01 < 5.1 E+00 < 8.5E+00 < 4.6E+00 < 8.0E+00 < 1 .4E+01 < 5.2E+00 < 4.2E+00 < 3.5E+01 < 9.BE+00 MW-185 2/1 /2022 pCi/L < 2.6E+00 < 2.9E+00 < 6.3E+00 < 2.7E+00 < 5.7E+00 < 2.BE+00 < 4.BE+00 < 8.5E+00 < 2.BE+00 < 2.7E+00 < 1 .9E+01 < 6.5E+00 MW- 1 86 2/1 /2022 pCi/L < 3.8E+00 < 3.4E+00 < 7.5E+00 < 3.7E+00 < 6.6E+00 < 3.6E+00 < 6.3E+00 < 1 .2E+01 < 3.5E+00 < 4.2E+00 < 2.6E+01 < 9.6E+00 MW-187 2/1/2022 pCi/L < 3.3E+00 < 3.8E+00 < 8.3E+00 < 3.3E+00 < 6.3E+00 < 3.6E+00 < 5.9E+00 < 1 .2E+01 < 3.8E+00 < 3.7E+00 < 2.5E+01 < 8.0E+00 MW-1 88 2/1/2022 pCi/L < 3.7E+00 < 4.7E+00 < 1 .2E+01 < 4.1 E+00 < 7.7E+00 < 4.1 E+00 < 8.2E+00 < 1 .3E+01 < 4.2E+00 < 4.4E+00 < 3. 1 E+01 < 9.BE+00 MW-21 1 2/1 /2022 pCi/L < 4.3E+00 < 3.5E+00 < 6.9E+00 < 3.6E+00 < 8.0E+00 < 4.1 E+00 < 7.BE+00 < 1 .4E+01 < 3.BE+O0 < 3.4E+00 < 3.0E+01 < 9.2E+00 MW-21 1 2/1 /2022 pCi/L < 4.6E+00 < 5.2E+00 < 1 .0E+01 < 4.5E+00 < 7.4E+00 < 5.2E+00 < 1 .0E+01 < 1 .4E+01 < 5.0E+00 < 5.0E+00 < 3.0E+01 < 1 .3E+01 MW-1 1 0 2/2/2022 pCi/L < 4.7E+00 < 5.7E+00 < 1 .0E+01 < 5.2E+00 < 1 .2E+01 < 5.7E+00 < 9.1 E+00 < 1 .3E+01 < 5.0E+00 < 5.2E+00 < 3.2E+01 < 1 .2E+01 MW-1 1 2 2/2/2022 pCi/L < 4.6E+00 < 4.5E+00 < 8.4E+00 < 5.4E+00 < 9.0E+00 < 5.0E+00 < 7.7E+00 < 1 .3E+01 < 6.0E+00 < 4.9E+00 < 3.1 E+01 < 1 .4E+01 MW-1 1 4 2/2/2022 pCi/L < 4.BE+00 < 5.5E+00 < 1 .1 E+01 < 5.9E+00 < 1 . 1 E+01 < 5.7E+00 < 1 .0E+01 < 1 .5E+01 < 4.9E+00 < 6.0E+00 < 3.6E+01 < 8.BE+00 MW-1 1 6 2/2/2022 pCi/L < 4.9E+00 < 4.5E+00 < 9.5E+00 < 4.BE+00 < 9.BE+00 < 4.5E+00 < 7.6E+00 < 1 .4E+01 < 4.4E+00 < 4.6E+00 < 2.8E+01 < 1 .2E+01 MW-1 1 8 2/2/2022 pCi/L < 5.1 E+00 < 6.7E+00 < 1 .7E+01 < 5.5E+00 < 1 .2E+01 < 7.4E+00 < 9.7E+00 < 1 .4E+01 < 4.BE+00 < 6.4E+00 < 3.6E+01 < 1 .3E+01 MW-1 37 2/2/2022 pCi/L < 3.BE+00 < 3.6E+00 < 7.9E+00 < 4.7E+00 < 6.6E+00 < 4.2E+00 < 6.6E+00 < 1 .3E+01 < 3.9E+00 < 4.0E+00 < 2.9E+01 < 8.BE+00

RBG-48220 I Rev. 2022 I Page 46 of 70 Annual Radioactive Effluent Release Report Attachment 1 Page 3 of 27 Groundwater Monitoring Well Sampling Results Table 1 7, Gamma Isotopic Results Station ID Sample Date Units MN-54 CO-58 FE-59 CO-60 ZN-65 NB-95 ZR-95 1-131 CS-134 CS-137 BA-140 LA-140 MW-1 39 2/2/2022 pCi/L < 2.8E+00 < 3.3E+00 < 7.2E+OO < 3.2E+OO < 5.0E+00 < 3.1 E+00 < 5.6E+00 < 9.7E+00 < 3.1 E+00 < 3.1 E+00 < 2.2E+01 < 7. 1 E+00 MW-141 2/2/2022 pCi/L < 3.3E+00 < 3.9E+00 < 9.2E+00 < 4.0E+00 < 8.0E+00 < 4.4E+OO < 7.2E+00 < 1 .2E+01 < 4.0E+O0 < 4.1 E+00 < 2.6E+01 < 9.6E+00 MW-153 2/2/2022 pCi/L < 4.8E+00 < 3.8E+00 < 9.4E+00 < 4.SE+00 < 9.3E+00 < 3.8E+00 < 7.9E+00 < 1.5E+01 < 3.5E+00 < 4.2E+00 < 2.6E+01 < 9.3E+00 MW-161 2/2/2022 pCi/L < 4.2E+00 < 4.6E+00 < 9.5E+OO < 4.2E+OO < 9.3E+00 < 5.6E+OO < 6.9E+00 < 1 .3E+01 < 4.8E+OO < 4.SE+00 < 2.9E+01 < 1 .0E+01 MW-1 70 2/2/2022 pCi/L < 2.6E+00 < 3.1 E+00 < 6.6E+00 < 3.2E+00 < 5.7E+OO < 3.2E+00 < 5.2E+OO < 8.7E+00 < 3.2E+O0 < 2.6E+OO < 1 .9E+01 < 7.3E+OO MW-182 2/2/2022 pCi/L < 4.1 E+00 < 4.2E+00 < 9.2E+00 < 4.5E+00 < 8.2E+00 < 4.6E+00 < 7.3E+00 < 1 .3E+01 < 4.4E+00 < 3.9E+00 < 3.0E+01 < 8.8E+00 MW-209 2/2/2022 pCi/L < 3.7E+OO < 4.2E+00 < 8.2E+00 < 4.4E+00 < 8.0E+00 < 5.0E+OO < 7.0E+00 < 1 .3E+01 < 4.8E+00 < 4.4E+00 < 3.0E+01 < 9.0E+00 MW-221 2/2/2022 pCi/L < 5.2E+00 < 5.2E+00 < 1.3E+01 < 6.3E+OO < 1 .0E+01 < 5.7E+00 < 9.2E+OO < 1 .4E+01 < 6.3E+00 < 4.9E+O0 < 3.1 E+01 < 1 .0E+01 MW-223 2/2/2022 pCi/L < 5.2E+00 < 4.9E+00 < 1 . 1 E+01 < 5.1 E+00 < 9.7E+00 < 4.2E+00 < 8.9E+00 < 1.3E+01 < 5.6E+00 < 4.8E+00 < 3.4E+01 < 9.7E+00 MW-223 2/2/2022 pCi/L < 5.SE+OO < 6.2E+00 < 1.0E+01 < 6.1 E+OO < 1.2E+01 < 5.SE+00 < 9.7E+00 < 1 .4E+01 < 6.0E+00 < 4.7E+OO < 3.4E+01 < 1 .4E+01 PZ-01 2/2/2022 pCi/L < 4.9E+00 < 4.9E+00 < 1 .4E+01 < 5.1 E+00 < 1 .1 E+01 < 6.SE+OO < 9.9E+00 < 1.4E+01 < 6.5E+OO < 5.4E+00 < 3.5E+01 < 1 .2E+01 SW-1 03 2/2/2022 pCi/L < 2.5E+00 < 2.7E+00 < 6.1 E+00 < 2.6E+00 < 5.3E+00 < 2.9E+00 < 4.9E+00 < 8.0E+00 < 2.9E+00 < 2.7E+00 < 1.9E+01 < 5.4E+00 SW-104 2/2/2022 pCi/L < 3.6E+00 < 4.2E+00 < 9.4E+00 < 4.0E+00 < 8. 1 E+00 < 4.0E+OO < 6.9E+00 < 1.1 E+01 < 4.1 E+00 < 4.2E+OO < 2.7E+01 < 1 .0E+01 MW-148 2/28/2022 pCi/L < 5.0E+00 < 4.9E+00 < 9.0E+OO < 6.5E+OO < 8.3E+00 < 5.SE+OO < 1 . 1 E+01 < 1 . 1 E+01 < 6.0E+O0 < 4.8E+OO < 2.2E+01 < 1 .3E+01 MW-1 24 5/24/2022 pCi/L < 1.7E+00 < 1 .9E+00 < 4.3E+00 < 1 .7E+00 < 3.5E+00 < 2.0E+00 < 3.SE+00 < 1.2E+01 < 1.9E+00 < 1.7E+00 < 1 .8E+01 < 6.1 E+00 MW-125 5/24/2022 pCi/L < 1 .9E+00 < 2.0E+00 < 4.9E+OO < 1 .9E+OO < 4.0E+00 < 2.2E+OO < 3.8E+00 < 1 .3E+01 < 2.1 E+OO < 2.0E+00 < 2.2E+01 < 6.7E+00 MW-142 5/24/2022 pCi/L < 3.SE+OO < 3.6E+00 < 8.3E+00 < 3.SE+00 < 7.7E+OO < 3.8E+00 < 7.0E+OO < 1.1 E+01 < 3.6E+00 < 3.2E+OO < 2.8E+01 < 9.0E+OO

RBG-48220 l Rev. 2022 J Page 47 of 70 Annual Radioactive Effluent Release Re_port Attachment 1 Page 4 of 27 Groundwater Monitoring Well Sampling Results Table 1 7, Gamma Isotopic Results Station ID Sample Date Units MN-54 C0-58 FE-59 C0-60 ZN-65 NB-95 ZR-95 1-131 CS-134 CS-137 BA-140 LA-1 40 MW-1 42 5/24/2022 pCi/L < 4.7E+00 < 5.0E+00 < 8.2E+OO < 5.2E+OO < 9.0E+00 < 4.3E+OO < 8.0E+OO < 1 .4E+01 < 5.1 E+00 < 4.6E+OO < 3.3E+01 < 8.7E+O0 MW-144 5/24/2022 pCi/L < 1 .7E+00 < 1 .SE+00 < 4.7E+00 < 1 .9E+00 < 3.3E+00 < 2.0E+OO < 3.4E+00 < 1 .0E+01 < 1 .9E+00 < 1 .SE+00 < 1 .8E+01 < 6.5E+00 MW-146 5/24/2022 pCi/L < 1 .4E+00 < 1 .6E+00 < 3.7E+00 < 1 .5E+00 < 3.1 E+00 < 1 .SE+00 < 2.9E+00 < 1 .2E+01 < 1 .6E+00 < 1 .5E+00 < 1 .9E+01 < 5.9E+00 MW-147 5/24/2022 pCi/L < 1 .SE+00 < 2.0E+00 < 4.SE+00 < 1 .7E+00 < 3.7E+00 < 1 .9E+00 < 3.7E+00 < 1 . 1 E+01 < 2.0E+00 < 1 .SE+00 < 1 .9E+01 < 7.3E+00 MW-1 48 5/24/2022 pCi/L < 2.1 E+00 < 2.3E+00 < 5.1 E+00 < 2.0E+OO < 4.2E+00 < 2.4E+OO < 4.0E+00 < 1 .2E+01 < 2.2E+OO < 2.0E+00 < 2.2E+01 < 7.5E+00 MW-155 5/24/2022 pCi/L < 1.6E+OO < 2.0E+00 < 4.7E+00 < 1 .7E+00 < 3.5E+00 < 2.0E+00 < 3.4E+OO < 1 .1 E+01 < 1.7E+OO < 1 .6E+OO < 1 .8E+01 < 6.SE+00 MW-1 58 5/24/2022 pCi/L < 1 .6E+00 < 1 .7E+00 < 3.SE+OO < 1.7E+OO < 3. 1 E+00 < 1 .SE+00 < 3.2E+OO < 1 .1 E+01 < 1 .7E+00 < 1 .7E+OO < 1 .8E+01 < 6.2E+00 MW-159 5/24/2022 pCi/L < 1 .6E+00 < 1 .SE+00 < 4.4E+00 < 1 .7E+00 < 3.4E+00 < 1 .9E+OO < 3.3E+00 < 1 .2E+01 < 1 .SE+OO < 1 .6E+00 < 1 .9E+01 < 6.3E+00 MW-1 61 5/24/2022 pCi/L < 1 .7E+00 < 1 .SE+00 < 4.4E+00 < 1 .7E+00 < 3.4E+00 < 1 .9E+00 < 3.4E+00 < 1 .0E+01 < 1.SE+00 < 1 .7E+00 < 1 .7E+01 < 6.0E+00 MW-1 62 5/24/2022 pCi/L < 4.9E+00 < 4.1 E+00 < 8.SE+00 < 3.1 E+00 < 1 . 1 E+01 < 4.4E+00 < 7.2E+00 < 1 .4E+01 < 4.5E+00 < 4.1 E+00 < 3.2E+01 < 1 .1 E+01 MW-185 5/24/2022 pCi/L < 3.7E+00 < 4.1 E+00 < 8.2E+00 < 3.9E+00 < 7.4E+00 < 4.1 E+OO < 6.6E+00 < 1 . 1 E+01 < 3.4E+OO < 4.9E+00 < 2.4E+01 < 1 . 1 E+01 MW-205 5/24/2022 pCi/L < 4.5E+OO < 5.SE+00 < 9.6E+OO < 4.4E+00 < 6.7E+OO < 5.2E+00 < 8.6E+OO < 1 .4E+01 < 5.SE+O0 < 5.5E+OO < 3.0E+01 < 8.6E+00 MW-227 5/24/2022 pCi/L < 4.9E+00 < 5.0E+00 < 1 .0E+01 < 5.0E+OO < 8.5E+00 < 5.0E+OO < 8.1 E+00 < 1 .4E+01 < 5.4E+O0 < 4.SE+OO < 3.8E+01 < 1 .0E+01 MW-1 00 5/25/2022 pCi/L < 4.5E+OO < 4.4E+00 < 1 . 1 E+01 < 4.2E+00 <; 8.1 E+00 < 4.1 E+OO < 9.9E+00 < 1 .4E+01 < 4.1 E+00 < 4.2E+OO < 3.1 E+01 < 1 .3E+01 MW-1 06 5/25/2022 pCi/L < 4.6E+00 < 5.0E+00 < 1 .2E+01 < 5.SE+00 < 1 .2E+01 < 5.6E+00 < 7.9E+00 < 1 .2E+01 < 5.9E+00 < 5.4E+00 < 3.3E+01 < 1 .3E+01 MW-1 1 0 5/25/2022 pCi/L < 1 .4E+00 < 1 .7E+00 < 3.9E+00 < 1 .5E+00 < 2.9E+00 < 1 .7E+00 < 2.9E+00 < 1 . 1 E+01 < 1 .6E+00 < 1 .5E+00 < 1 .7E+01 < 5.2E+00 MW-1 1 2 5/25/2022 pCi/L < 1 .9E+00 < 2.0E+00 < 4.7E+OO < 2.1 E+OO < 3.7E+00 < 2.1 E+00 < 3.6E+OO < 1 .2E+01 < 1 .9E+00 < 1 .9E+OO < 2.2E+01 < 7.SE+OO

RBG-48220 I Rev. 2022 I Page 48 of 70 Annual Radioactive Effluent Release Report Attachment 1 Page 5 of 27 Groundwater Monitoring Well Sampling Results Table 1 7, Gamma Isotopic Results Station ID Sample Date Units MN-54 CO-58 FE-59 CO-60 ZN-65 NB-95 ZR-95 1-131 CS-134 CS-137 BA-140 LA-140 MW-1 1 4 5/25/2022 pCi/L < 1 .6E+00 < 1 .7E+00 < 4.3E+00 < 1 .7E+00 < 3.4E+00 < 1 .BE+00 < 3.2E+00 < 1 .2E+01 < 1 .7E+00 < 1 .5E+00 < 1 .8E+01 < 6.4E+00 MW- 1 1 6 5/25/2022 pCi/L < 1 .5E+00 < 1 .BE+00 < 4.4E+00 < 1 .6E+00 < 3.0E+00 < 1 .9E+00 < 3.2E+00 < 1 . 1 E+01 < 1 .7E+00 < 1 .SE+00 < 1 .9E+01 < 6.5E+00 MW-1 18 5/25/2022 pCi/L < 1 .6E+00 < 2.0E+00 < 4.3E+00 < 1 .7E+00 < 3.4E+00 < 2.0E+00 < 3.4E+00 < 1 .2E+01 < 1 .BE+00 < 1 .6E+00 < 2.0E+01 < 6.3E+00 MW-120 5/25/2022 pCi/L < 3.9E+00 < 5.6E+00 < 1 . 1 E+01 < 6.3E+00 < 1 . 2E+01 < 4.6E+00 < 9.9E+00 < 1 .4E+01 < 5.6E+00 < 5.6E+00 < 3.2E+01 < 7.9E+00 MW-122R 5/25/2022 pCi/L < 5.5E+00 < 6.0E+00 < 1 . 1 E+01 < 5.6E+00 < 9.4E+00 < 5.BE+00 < 8.SE+00 < 1 .4E+01 < 6.1 E+00 < 5.9E+00 < 3.6E+01 < 1 .4E+01 MW-122R 5/25/2022 pCi/L < 4.9E+00 < 6.6E+00 < 1 .4E+01 < 5.4E+00 < 7.6E+00 < 6.0E+00 < 9.2E+00 < 1 .4E+01 < 6.7E+00 < 4.9E+00 < 3.3E+01 < 1 . 1 E+01 MW-126 5/25/2022 pCi/L < 1 .6E+00 < 2.0E+00 < 4.BE+00 < 1 .BE+00 < 3.4E+00 < 1 .9E+00 < 3.4E+00 < 1 .2E+01 < 1 .BE+00 < 1 .7E+00 < 1 .9E+01 < 6.9E+00 MW-1 28 5/25/2022 pCi/L < 4.6E+00 < 5.7E+00 < 1 .0E+01 < 6.4E+00 < 1 .2E+01 < 5.SE+00 < 8.5E+00 < 1 .3E+01 < 6.BE+00 < 4.9E+00 < 3.1 E+01 < 1 .4E+01 MW-130 5/25/2022 pCi/L < 5.5E+00 < 6.5E+00 < 1 .3E+01 < 6.0E+00 < 1 .4E+01 < 6.2E+00 < 1 .2E+01 < 1 .4E+01 < 5.2E+00 < 5.BE+00 < 3.5E+01 < 1 . 1 E+01 MW-131 5/25/2022 pCi/L < 5.BE+00 < 5.2E+00 < 1 .2E+01 < 4.3E+00 < 8.6E+00 < 4.7E+00 < 9.6E+00 < 1 .2E+01 < 5.6E+00 < 4.6E+00 < 3.6E+01 < 1 .0E+01 MW-1 32 5/25/2022 pCi/L < 4.2E+00 < 5.1 E+00 < 1 . 1 E+01 < 4.SE+00 < 1 .0E+01 < 5.4E+00 < 7.6E+00 < 1 .5E+01 < 4.9E+00 < 5.1 E+00 < 3.1 E+01 < 9.9E+00 MW-137 5/25/2022 pCi/L < 1 .5E+00 < 1 .7E+00 < 4.3E+00 < 1 .6E+00 < 3.4E+00 < 1 .9E+00 < 3.2E+00 < 1 .4E+01 < 1 .6E+00 < 1 .SE+00 < 2.0E+01 < 6.7E+00 MW-139 5/25/2022 pCi/L < 5.9E+00 < 4.9E+00 < 1 .0E+01 < 5.BE+00 < 1 . 1 E+01 < 5.1 E+00 < 9.1 E+00 < 1 .4E+01 < 4.7E+00 < 4.6E+00 < 3.7E+01 < 1 .0E+01 MW-141 5/25/2022 pCi/L < 1 .6E+00 < 2.0E+00 < 4.6E+00 < 1 .7E+00 < 3.BE+00 < 1 .9E+00 < 3.BE+00 < 1 .4E+01 < 1 .9E+00 < 1 .BE+00 < 2.2E+01 < 7.7E+00 MW-151 5/25/2022 pCi/L < 5.BE+00 < 5.4E+00 < 9.9E+00 < 5.4E+00 < 7.7E+00 < 6.BE+00 < 9.3E+00 < 1 .4E+01 < 6.SE+O0 < 5.7E+00 < 3.5E+01 < 1 . 1 E+01 MW-1 53 5/25/2022 pCi/L < 1 .4E+00 < 1 .7E+00 < 3.BE+00 < 1 .5E+00 < 2.BE+00 < 1 .BE+00 < 3.1 E+00 < 1 .2E+01 < 1 .5E+00 < 1 .5E+00 < 1 .8E+01 < 6.0E+00 MW-1 56 5125/2022 pCi/L < 1 .7E+00 < 2.2E+00 < 5.1 E+00 < 2.2E+00 < 4.2E+00 < 2.0E+00 < 3.5E+00 < 1 .2E+01 < 2.0E+00 < 1 .BE+00 < 2.1 E+01 < 6.7E+00

RBG-48220 I Rev. 2022 I Page 49 of 70 Annual Radioactive Effluent Release Report Attachment 1 Page 6 of 27 Groundwater Monitoring Well Sampling Results Table 1 7, Gamma Isotopic Results Station ID Sample Date Units MN-54 CO-58 FE-59 CO-60 ZN-65 NB-95 ZR-95 1-131 CS-134 CS-137 BA-140 LA-140 MW-157 5/25/2022 pCi/L < 2.2E+00 < 2.4E+00 < 5.0E+OO < 2.3E+OO < 4.6E+00 < 2.5E+OO < 4.5E+00 < 1 .4E+01 < 2.2E+OO < 2.1 E+00 < 2.4E+01 < 8.0E+00 MW- 1 64 5/25/2022 pCi/L < 5.3E+00 < 5.SE+00 < 1 .2E+01 < 4.9E+00 < 1.1 E+01 < 5.2E+OO < 9.6E+00 < 1.4E+01 < 5.6E+OO < 5.4E+OO < 3. 1 E+01 < 1.2E+01 MW-165 5/25/2022 pCi/L < 6.1 E+00 < 5.1 E+00 < 1 .2E+01 < 7.9E+00 < 1 . 1 E+01 < 6.7E+00 < 8.3E+00 < 1 .5E+01 < 4.9E+00 < 5.9E+00 < 3.9E+01 < 1 .2E+01 MW-167 5/25/2022 pCi/L < 5.2E+00 < 5.6E+00 < 1 .2E+01 < 5.5E+00 < 1 .0E+01 < 4.5E+00 < 8.3E+00 < 1 .4E+01 < 5.5E+00 < 5.4E+00 < 3.5E+01 < 1 . 1 E+01 MW- 1 70 5/25/2022 pCi/L < 4.5E+00 < 4.6E+00 < 1 .1 E+01 < 4.SE+00 < 8.9E+00 < 5.6E+OO < 9.0E+00 < 1 .4E+01 < 4.9E+00 < 4.2E+OO < 3.7E+01 < 9.4E+00 MW-1 78 5/25/2022 pCi/L < 1.9E+OO < 2.1 E+00 < 4.7E+00 < 2.0E+00 < 3.6E+00 < 2.2E+00 < 3.9E+OO < 1.4E+01 < 2.0E+00 < 1 .SE+00 < 2.1 E+01 < 7.5E+OO MW-179 5/25/2022 pCi/L < 1 .4E+OO < 1 .7E+00 < 3.4E+OO < 1 .7E+OO < 2.5E+00 < 1 .7E+00 < 3.0E+00 < 1 .0E+01 < 1 .5E+O0 < 1 .4E+00 < 1.6E+01 < 5.5E+00 MW-180 5/25/2022 pCi/L < 5.SE+00 < 7.3E+00 < 1 .5E+01 < 6.0E+00 < 1 .1 E+01 < 6.0E+OO < 1 .1 E+01 < 1 .4E+01 < 6.SE+00 < 5.2E+00 < 3.9E+01 < 1 .4E+01 MW-182 5/25/2022 pCi/L < 5.6E+00 < 4.SE+00 < 1 .2E+01 < 5.0E+00 < 9.3E+00 < 6.SE+00 < 9.5E+00 < 1.4E+01 < 5.6E+00 < 5.7E+00 < 3.9E+01 < 7.3E+00 MW-186 5/25/2022 pCi/L < 5.2E+00 < 6.2E+00 < 1.2E+01 < 7.0E+00 < 9.2E+00 < 5.9E+00 < 7.9E+00 < 1 .4E+01 < 6.0E+00 < 3.9E+00 < 3.3E+01 < 1.2E+01 MW-187 5/25/2022 pCi/L < 4.5E+00 < 6.0E+00 < 9.1 E+00 < 5.SE+00 < 1 .2E+01 < 6.3E+OO < 1 .0E+01 < 1.4E+01 < 6.4E+00 < 5.2E+OO < 2.5E+01 < 9.SE+00 MW-1 88 5/25/2022 pCi/L < 3.9E+OO < 4.9E+00 < 1 .0E+01 < 5.1 E+OO < 1 .0E+01 < 4.4E+00 < 8.3E+OO < 1 .5E+01 < 4.9E+OO < 4.5E+00 < 2.8E+01 < 9.0E+00 MW-201 5/25/2022 pCi/L < 5.7E+00 < 5.5E+00 < 1.2E+01 < 5.6E+00 < 1.3E+01 < 6.5E+OO < 1 .0E+01 < 1 .4E+01 < 4.8E+00 < 5.7E+00 < 2.7E+01 < 1 .2E+01 MW-209 5/25/2022 pCi/L < 5.1 E+OO < 5.9E+00 < 1 .4E+01 < 6.6E+00 < 9.7E+00 < 6.4E+00 < 7.9E+OO < 1 .3E+01 < 5.2E+00 < 5.4E+OO < 2.6E+01 < 1 .3E+01 MW-2 1 1 5/25/2022 pCi/L < 1 .6E+00 < 1 .8E+00 < 4.1 E+00 < 1.7E+00 < 3.3E+00 < 1.9E+00 < 3. 1 E+00 < 9.8E+00 < 1 .8E+00 < 1 .7E+00 < 1 .7E+01 < 5.4E+00 MW-21 1 5/25/2022 pCi/L < 1.9E+00 < 2.1 E+00 < 4.9E+00 < 1 .9E+00 < 3.7E+00 < 2.3E+00 < 4.0E+00 < 1 .4E+01 < 2.1 E+00 < 2.0E+00 < 2.3E+01 < 7.6E+00 MW-21 3 5/25/2022 pCi/L < 4.9E+00 < 5.9E+00 < 1 .4E+01 < 5.5E+OO < 1 .3E+01 < 6.7E+00 < 1.1 E+01 < 1 .3E+01 < 7.2E+00 < 5.8E+00 < 3.8E+01 < 1 .3E+01

RBG-48220 I Rev. 2022 I Page 50 of 70 Annual Radioactive Effluent Release Report Attachment 1 Page 7 of 27 Groundwater Monitoring Well Sampling Results Table 1 7, Gamma Isotopic Results Station ID Sample Date Units MN-54 CO-58 FE-59 CO-60 ZN-65 NB-95 ZR-95 1-131 CS-134 CS-137 BA-140 LA-140 MW-215 5/25/2022 pCi/L < 4.4E+00 < 4.8E+00 < 1 .3E+01 < 5.3E+00 < 1 . 2E+01 < 5.2E+00 < 1 . 1 E+01 < 1 .3E+01 < 6.1 E+00 < 4.3E+OO < 3.5E+01 < 1 .2E+01 MW-21 7 5/25/2022 pCi/L < 4.7E+00 < 5.4E+00 < 1 .5E+01 < 5.9E+OO < 1 . 1 E+01 < 5.3E+OO < 1 .0E+01 < 1 .4E+01 < 5.5E+O0 < 4.9E+OO < 3.2E+01 < 1 .5E+01 MW-21 9 5/25/2022 pCi/L < 5.3E+00 < 4.1 E+00 < 1 .5E+01 < 5.3E+00 < 1 .3E+01 < 6.5E+00 < 8.0E+00 < 1 .2E+01 < 5.4E+00 < 5.6E+00 < 3.0E+01 < 1 . 1 E+01 MW-221 5/25/2022 pCi/L < 1 .5E+00 < 1 .7E+00 < 4.3E+OO < 1 .6E+OO < 3.0E+00 < 1 .9E+OO < 3.1 E+00 < 1 .2E+01 < 1 .6E+OO < 1 .5E+00 < 1 .9E+01 < 6.4E+00 MW-225 5/25/2022 pCi/L < 4.5E+00 < 5.1 E+00 < 1 . 1 E+01 < 4.8E+00 < 8.3E+OO < 5.2E+OO < 7.8E+OO < 1 .3E+01 < 5.1 E+00 < 5.0E+OO < 2.9E+01 < 9.7E+OO MW-231 5/25/2022 pCi/L < 4.BE+00 < 4.5E+00 < 1 .3E+01 < 5.4E+00 < 1 .0E+01 < 6.2E+00 < 8.0E+00 < 1 .3E+01 < 6.0E+00 < 4.BE+00 < 3.0E+01 < 9.4E+00 MW-231 5/25/2022 pCi/L < 5.3E+00 < 5.8E+00 < 1 . 1 E+01 < 5.3E+00 < 7.0E+00 < 4.5E+OO < 9.0E+00 < 1 .4E+01 < 5.BE+O0 < 5.7E+OO < 3.6E+01 < 1 .3E+01 MW-233 5/25/2022 pCi/L < 4.5E+OO < 4.3E+00 < 1 . 1 E+01 < 5.7E+OO < 1 .3E+01 < 6.0E+00 < 8.2E+OO < 1 .2E+01 < 4.5E+00 < 5.4E+OO < 3.1 E+01 < 1 .3E+01 MW-235 5/25/2022 pCi/L < 4.6E+00 < 5.4E+00 < 9.0E+00 < 5.2E+00 < 8.8E+00 < 6.1 E+00 < 8.7E+00 < 1 .4E+01 < 5.4E+00 < 4.6E+00 < 3.0E+01 < 9.5E+00 PZ-01 5/25/2022 pCi/L < 1 .6E+00 < 1 .9E+00 < 5.0E+00 < 1 .7E+00 < 3.5E+00 < 2.0E+00 < 3.4E+OO < 1 .2E+01 < 1 .8E+00 < 1 .7E+00 < 2.0E+01 < 6.6E+00 PZ-01 5/25/2022 pCi/L < 1 .7E+00 < 1 .9E+00 < 4.4E+OO < 1 .6E+OO < 3.3E+00 < 2.0E+OO < 3.4E+00 < 1 .3E+01 < 1 .BE+O0 < 1 .6E+00 < 2.0E+01 < 7.0E+00 PZ-03 5/25/2022 pCi/L < 4.8E+00 < 7.2E+00 < 1 .2E+01 < 5.9E+00 < 1 .3E+01 < 6.1 E+00 < 1 .0E+01 < 1 .4E+01 < 5.8E+00 < 6.2E+00 < 3.1 E+01 < 1 .5E+01 MW-1 34 5/26/2022 pCi/L < 6.1 E+00 < 5.1 E+00 < 1 .2E+01 < 4.6E+00 < 9.2E+00 < 5.8E+OO < 9.2E+00 < 1 .4E+01 < 5.8E+00 < 5.5E+OO < 3.4E+01 < 8.9E+00 MW- 1 69 5/26/2022 pCi/L < 5.9E+OO < 5.2E+O0 < 1 .0E+01 < 5.0E+OO < 8.5E+00 < 6.0E+OO < 8.8E+00 < 1 . 1 E+01 < 5.0E+O0 < 5.4E+00 < 3.4E+01 < 1 . 1 E+01 MW-207 5/26/2022 pCi/L < 5.0E+00 < 4.6E+00 < 1 .3E+01 < 5.7E+00 < 1 . 1 E+01 < 5.0E+00 < 8.6E+00 < 1 .4E+01 < 5.6E+00 < 4.8E+00 < 3.1 E+01 < 9.9E+00 MW-223 5/26/2022 pCi/L < 5.9E+OO < 5.3E+00 < 1 .2E+01 < 5.3E+OO < 9.0E+00 < 5.4E+OO < 9.4E+00 < 1 .3E+01 < 5.2E+OO < 5.7E+00 < 2.7E+01 < 9.3E+00 MW-223 5/26/2022 pCi/L < 7.5E+00 < 6.2E+00 < 1 .4E+01 < 6.1 E+00 < 1 .3E+01 < 6.0E+OO < 1 .2E+01 < 1 .4E+01 < 7.2E+O0 < 6.5E+OO < 3.7E+01 < 1 . 1 E+01

RBG-48220 l Rev. 2022 J Page 51 of 70 Annual Radioactive Effluent Release Re_port Attachment 1 Page 8 of 27 Groundwater Monitoring Well Sampling Results Table 1 7, Gamma Isotopic Results Station I D Sample Date Units MN-54 CO-58 FE-59 CO-60 ZN-65 NB-95 ZR-95 1-131 CS-134 CS-137 BA-140 LA-140 MW-229 5/26/2022 pCi/L < 5.9E+00 < 5.9E+00 < 1 .3E+01 < 5.3E+00 < 9.7E+00 < 5.8E+00 < 1 .2E+01 < 1 .4E+01 < 6.4E+00 < 5.2E+00 < 3.5E+01 < 1 .3E+01 SW-102 5/26/2022 pCi/L < 4.8E+00 < 6.0E+00 < 1 .3E+01 < 5.3E+00 < 9.5E+00 < 5.4E+00 < 1 . 1 E+01 < 1 .4E+01 < 5.9E+00 < 6.2E+00 < 3.5E+01 < 1 . 1 E+01 SW- 1 04 5/26/2022 pCi/L < 6.7E+00 < 5.3E+00 < 1 .4E+01 < 7.2E+00 < 1 .2E+01 < 5.0E+00 < 9.4E+00 < 1 .3E+01 < 6.6E+00 < 5.SE+00 < 2.9E+01 < 1 . 5E+01 MW-100 8/30/2022 pCi/L < 3.7E+00 < 4.SE+00 < 9.2E+00 < 4.1 E+00 < 7.6E+00 < 4.6E+00 < 7.4E+00 < 1 .5E+01 < 4.7E+00 < 4.SE+00 < 2.7E+01 < 8.6E+00 MW-1 24 8/30/2022 pCi/L < 1 .7E+00 < 1 .8E+00 < 4.8E+00 < 1 .9E+00 < 3.7E+00 < 1 .9E+00 < 3.7E+00 < 1 .2E+01 < 1 .8E+00 < 1 .6E+00 < 2.0E+01 < 6.3E+00 MW-125 8/30/2022 pCi/L < 1 .7E+00 < 2.1 E+00 < 4.5E+00 < 1 .9E+00 < 3.3E+00 < 2.0E+00 < 3.6E+00 < 1 . 1 E+01 < 1 .9E+00 < 1 .7E+00 < 1 .9E+01 < 6.9E+00 MW-125 8/30/2022 pCi/L < 1 .8E+00 < 2.0E+00 < 5.0E+00 < 1 .8E+00 < 3.SE+00 < 2.2E+00 < 3.6E+00 < 1 .2E+01 < 2.1 E+00 < 1 .7E+00 < 2.1 E+01 < 6.8E+00 MW-1 26 8/30/2022 pCi/L < 1 .8E+00 < 2.1 E+00 < 5.2E+00 < 2.0E+00 < 3.8E+00 < 2.3E+00 < 4.0E+00 < 1 .3E+01 < 2.0E+00 < 2.0E+00 < 2.1 E+01 < 6.SE+00 MW-1 26 8/30/2022 pCi/L < 1 .7E+00 < 1 .8E+00 < 4.SE+00 < 1 .7E+00 < 3.2E+00 < 2.0E+00 < 3.2E+00 < 1 .3E+01 < 1 .8E+00 < 1 .7E+00 < 2.0E+01 < 6.3E+00 MW-142 8/30/2022 pCi/L < 2.0E+00 < 2.1 E+00 < 5.4E+00 < 2.1 E+00 < 4.0E+00 < 2.3E+00 < 4.1 E+00 < 1 .2E+01 < 2.1 E+00 < 1 .8E+00 < 2.2E+01 < 7. 1 E+00 MW- 1 44 8/30/2022 pCi/L < 3.9E+00 < 4.6E+00 < 1 . 1 E+01 < 4.6E+00 < 9.2E+00 < 4.SE+00 < 8.9E+00 < 1 .4E+01 < 4.9E+00 < 3.6E+00 < 2.6E+01 < 9.6E+00 MW-146 8/30/2022 pCi/L < 1 .7E+00 < 2.0E+00 < 4.6E+00 < 1 .8E+00 < 3.6E+00 < 2.3E+00 < 3.8E+00 < 1 .5E+01 < 1 .9E+00 < 1 .9E+00 < 2.3E+01 < 7.0E+00 MW-147 8/30/2022 pCi/L < 1 .6E+00 < 1 .9E+00 < 4.SE+00 < 1 .7E+00 < 3.2E+00 < 1 .9E+00 < 3.5E+00 < 1 .2E+01 < 1 .6E+00 < 1 .7E+00 < 2.0E+01 < 6. 1 E+00 MW- 1 48 8/30/2022 pCi/L < 2.0E+00 < 2.1 E+00 < 5.0E+00 < 1 .8E+00 < 3.9E+00 < 2.3E+00 < 4.0E+00 < 1 .2E+01 < 2.1 E+00 < 2.1 E+00 < 2.2E+01 < 6.6E+00 MW-151 8/30/2022 pCi/L < 4.4E+00 < 5.0E+00 < 1 . 1 E+01 < 4.7E+00 < 8.7E+00 < 4.6E+00 < 7.9E+00 < 1 .4E+01 < 5.7E+00 < 4.6E+00 < 3.4E+01 < 1 .0E+01 MW-1 55 8/30/2022 pCi/L < 2.1 E+00 < 2.3E+00 < 5.3E+00 < 2.1 E+00 < 4.3E+00 < 2.SE+00 < 3.9E+00 < 1 .3E+01 < 2.1 E+00 < 2.1 E+00 < 2.2E+01 < 7. 1 E+00 MW-156 8/30/2022 pCi/L < 1 .6E+00 < 1 .7E+00 < 3.SE+00 < 1 .4E+00 < 3. 1 E+00 < 1 .7E+00 < 3.3E+00 < 1 . 1 E+01 < 1 .8E+00 < 1 .6E+00 < 2.0E+01 < 6. 1 E+00

RBG-48220 I Rev. 2022 I Page 52 of 70 Annual Radioactive Effluent Release Reort Attachment 1 Page 9 of 27 Groundwater Monitoring Well Sampling Results Table 1 7, Gamma Isotopic Results Station ID Sample Date Units MN-54 CO-58 FE-59 CO-60 ZN-65 NB-95 ZR-95 1-131 CS-134 CS-137 BA-140 LA-140 MW-1 57 8/30/2022 pCi/L < 1 .6E+00 < 1 .8E+00 < 3.8E+OO < 1 .7E+OO < 3.3E+00 < 1 .8E+OO < 3.1 E+00 < 1 . 1 E+01 < 1 .7E+00 < 1 .SE+00 < 1 .8E+01 < 6.1 E+00 MW- 1 58 8/30/2022 pCi/L < 1 .8E+00 < 1 .9E+00 < 4.7E+OO < 1 .9E+OO < 3.3E+00 < 2.2E+OO < 3.7E+00 < 1 .2E+01 < 1 .8E+00 < 1 .8E+00 < 2.2E+01 < 7.SE+00 MW- 1 59 8/30/2022 pCi/L < 1 .9E+00 < 2.3E+00 < 5.2E+00 < 2.0E+00 < 3.9E+00 < 2.2E+00 < 4.0E+00 < 1 .4E+01 < 2.0E+00 < 1 .9E+00 < 2.4E+01 < 9.0E+00 MW-162 8/30/2022 pCi/L < 5.2E+00 < 5.9E+00 < 1 .3E+01 < 5.1 E+00 < 7.9E+00 < 5.9E+00 < 8.9E+00 < 1 .5E+01 < 6.0E+00 < 5.0E+00 < 3.0E+01 < 1 . 1 E+01 MW-1 64 8/30/2022 pCi/L < 4.SE+00 < 5.1 E+00 < 9.7E+OO < 4.9E+OO < 8.9E+00 < 4.9E+00 < 8.SE+OO < 1 .5E+01 < 4.9E+00 < 4.6E+OO < 3.2E+01 < 9.SE+00 MW-1 64 8/30/2022 pCi/L < 4.1 E+00 < 5.2E+00 < 1 .0E+01 < 5.2E+OO < 9.6E+00 < 4.3E+00 < 7.8E+OO < 1 .3E+01 < 5.0E+00 < 4.4E+OO < 3.2E+01 < 1 .0E+01 MW-165 8/30/2022 pCi/L < 5.1 E+OO < 7.0E+00 < 1 .3E+01 < 6.6E+OO < 1 .5E+01 < 6.3E+00 < 1 . 1 E+01 < 1 .5E+01 < 5.6E+00 < 4.4E+00 < 3.6E+01 < 1 .2E+01 MW-1 78 8/30/2022 pCi/L < 1 .6E+00 < 1 .9E+00 < 4.6E+OO < 1 .7E+OO < 3.3E+00 < 2.0E+00 < 3.3E+OO < 1 .2E+01 < 1 .8E+OO < 1 .7E+OO < 1 .8E+01 < 6.7E+00 MW-179 8/30/2022 pCi/L < 1 .6E+00 < 1 .7E+00 < 4.1 E+00 < 1 .SE+00 < 3. 1 E+00 < 1 .9E+00 < 3.2E+00 < 1 .3E+01 < 1 .7E+00 < 1 .SE+00 < 1 .9E+01 < 6.7E+00 MW-185 8/30/2022 pCi/L < 4.6E+00 < 4.SE+00 < 1 .0E+01 < 3.8E+00 < 8.2E+00 < 4.7E+00 < 7.7E+00 < 1 .5E+01 < 4.7E+00 < 4.3E+00 < 3.3E+01 < 8.SE+00 MW-1 86 8/30/2022 pCi/L < 4.3E+00 < 5.1 E+00 < 1 . 1 E+01 < 4.8E+OO < 7. 1 E+00 < 4.8E+00 < 8.3E+00 < 1 .4E+01 < 4.7E+OO < 5.2E+00 < 3.3E+01 < 1 . 1 E+01 MW-187 8/30/2022 pCi/L < 4.6E+00 < 4.4E+00 < 9.8E+OO < 4.0E+OO < 8.0E+00 < 4.0E+OO < 8.6E+00 < 1 .3E+01 < 4.3E+OO < 4.4E+00 < 3 . 1 E+01 < 1 . 1 E+01 MW-1 88 8/30/2022 pCi/L < 4.0E+00 < 4.3E+00 < 8.2E+00 < 4.5E+00 < 1 .0E+01 < 4.8E+OO < 7.7E+00 < 1 .5E+01 < 4.1 E+00 < 4.8E+00 < 2.9E+01 < 7.7E+00 MW-21 1 8/30/2022 pCi/L < 1 .9E+00 < 2.3E+00 < 5.2E+00 < 2.3E+00 < 4.2E+00 < 2.3E+OO < 3.9E+00 < 1 .3E+01 < 2.0E+00 < 2.0E+00 < 2.1 E+01 < 7.4E+00 MW-21 1 8/30/2022 pCi/L < 1 .9E+00 < 2.3E+00 < 5.2E+00 < 2.1 E+00 < 4.1 E+00 < 2.4E+00 < 4.1 E+00 < 1 .4E+01 < 2.1 E+00 < 2.0E+00 < 2.3E+01 < 7.0E+00 MW-1 1 0 8/31 /2022 pCi/L < 1 .7E+00 < 2.1 E+00 < 4.8E+00 < 1 .9E+00 < 3.8E+00 < 2.2E+00 < 3.SE+00 < 1 .5E+01 < 1 .9E+00 < 1 .8E+00 < 2.3E+01 < 7.3E+00 MW-1 1 0 8/31 /2022 pCi/L < 1 .7E+OO < 1 .9E+00 < 4.1 E+00 < 1 .8E+00 < 3.0E+OO < 2.0E+OO < 3.3E+OO < 1 .3E+01 < 1 .7E+00 < 1 .6E+OO < 2.1 E+01 < 6.9E+00

RBG-48220 I Rev. 2022 J Page 53 of 70 Annual Radioactive Effluent Release Report Attachment 1 Page 1 0 of 27 Groundwater Monitoring Well Sampling Results Table 1 7, Gamma Isotopic Results Station ID Sample Date Units MN-54 CO-58 FE-59 CO-60 ZN-65 NB-95 ZR-95 1-131 CS-134 CS-137 BA-140 LA-140 MW-1 1 2 8/31 /2022 pCi/L < 1 .6E+OO < 1 .9E+O0 < 4.7E+OO < 1 .7E+OO < 3.4E+00 < 2.0E+00 < 3.4E+00 < 1 .3E+01 < 1 .8E+00 < 1 .6E+OO < 2.0E+01 < 7.0E+00 MW-1 1 4 8/31/2022 pCi/L < 1 .8E+OO < 2.2E+00 < 4.5E+OO < 2.0E+OO < 3.6E+00 < 2.2E+00 < 3.8E+00 < 1 .4E+01 < 2.0E+00 < 1 .7E+00 < 2.2E+01 < 8.6E+00 MW-1 1 6 8/31 /2022 pCi/L < 1 .4E+00 < 1 .6E+00 < 3.9E+00 < 1 .9E+00 < 2.9E+00 < 1 .6E+00 < 2.6E+00 < 1 .0E+01 < 1 .5E+00 < 1 .4E+00 < 1 .7E+01 < 5.6E+00 MW-1 1 8 8/31/2022 pCi/L < 1 .7E+00 < 2.0E+00 < 4.9E+00 < 1 .9E+00 < 3.7E+00 < 2.1 E+00 < 3.5E+00 < 1 .3E+01 < 1 .9E+00 < 1 .7E+00 < 2.3E+01 < 7.2E+00 MW-137 8/31 /2022 pCi/L < 1 .8E+00 < 2.2E+00 < 5.2E+OO < 2.1 E+OO < 3.7E+00 < 2.4E+00 < 3.7E+OO < 1 .3E+01 < 2.0E+00 < 1 .8E+00 < 2.2E+01 < 7.5E+00 MW-139 8/31/2022 pCi/L < 5.8E+OO < 5.5E+00 < 1 .0E+01 < 7.2E+OO < 9.3E+00 < 4.7E+00 < 9.7E+OO < 1 .3E+01 < 5.8E+00 < 5.0E+OO < 3.4E+01 < 9.SE+0O MW-1 41 8/31/2022 pCi/L < 1 .7E+00 < 1 .9E+00 < 4.9E+OO < 1 .7E+OO < 3.6E+00 < 2.1 E+00 < 3.6E+OO < 1 .3E+01 < 1 .8E+00 < 1 .7E+OO < 2.0E+01 < 7.3E+O0 MW-1 53 8/31 /2022 pCi/L < 1 .8E+00 < 2.4E+00 < 5.7E+OO < 2.0E+OO < 3.9E+00 < 2.4E+00 < 4.2E+OO < 1 .5E+01 < 2.2E+00 < 2.1 E+OO < 2.5E+01 < 8.SE+OO MW-161 8/31 /2022 pCi/L < 1 .7E+00 < 2.1 E+00 < 4.9E+00 < 1 .7E+00 < 3.7E+00 < 2.3E+00 < 3.7E+00 < 1 .4E+01 < 2.0E+00 < 1 .8E+00 < 2.3E+01 < 7.3E+00 MW-1 70 8/31/2022 pCi/L < 4.9E+00 < 5.9E+00 < 9.5E+00 < 3.5E+00 < 7.5E+00 < 5.2E+00 < 9.2E+00 < 1 . 1 E+01 < 3.8E+00 < 4.5E+00 < 2.9E+01 < 1 .3E+01 MW-1 82 8/31 /2022 pCi/L < 4.7E+00 < 5.7E+00 < 1 .2E+01 < 4.7E+00 < 1 .2E+01 < 5.4E+OO < 8.8E+00 < 1 .3E+01 < 5.4E+OO < 5.5E+00 < 3.3E+01 < 1 .4E+01 MW-209 8/31 /2022 pCi/L < 3.7E+00 < 5.2E+00 < 1 .4E+01 < 6.1 E+00 < 8.9E+00 < 5.0E+OO < 9.9E+00 < 1 .3E+01 < 5.7E+OO < 4.5E+00 < 3.3E+01 < 8.2E+00 MW-221 8/31 /2022 pCi/L < 1 .8E+OO < 2.2E+00 < 4.8E+00 < 1 .6E+00 < 3.4E+OO < 2.1 E+OO < 4.0E+OO < 1 .4E+01 < 1 .9E+00 < 1 .9E+00 < 2.2E+01 < 6.5E+00 MW-223 8/31 /2022 pCi/L < 4.7E+OO < 4.6E+00 < 9.7E+00 < 4.6E+00 < 9.3E+OO < 5.0E+00 < 9.4E+OO < 1 .4E+01 < 5.4E+00 < 5.1 E+OO < 2.7E+01 < 1 . 1 E+01 PZ-01 8/31/2022 pCi/L < 1 .8E+00 < 2.1 E+00 < 5.2E+00 < 1 .9E+00 < 3.4E+00 < 2.3E+00 < 3.7E+00 < 1 .3E+01 < 2.0E+00 < 1 .8E+00 < 2.3E+01 < 7.9E+00 SW-1 02 8/31/2022 pCi/L < 5.6E+00 < 4.6E+00 < 1 .2E+01 < 5.3E+00 < 9.3E+00 < 4.9E+00 < 8.4E+00 < 1 .3E+01 < 5.0E+00 < 4.0E+00 < 3.0E+01 < 9.4E+00 SW-1 03 8/31/2022 pCi/L < 4.8E+00 < 4.5E+00 < 1 .3E+01 < 5.5E+OO < 1 .0E+01 < 5.0E+00 < 7.4E+OO < 1 .5E+01 < 5.3E+00 < 4.2E+OO < 3.0E+01 < 1 . 1 E+01

RBG-48220 I Rev. 2022 I Page 54 of 70 Annual Radioactive Effluent Release Report Attachment 1 Page 1 1 of 27 Groundwater Monitoring Well Sampling Results Table 1 7, Gamma Isotopic Results Station ID Sample Date Units MN-54 C0-58 FE-59 C0-60 ZN-65 NB-95 ZR-95 1-131 CS-134 CS-137 BA-140 LA-140 SW- 1 04 8/31/2022 pCi/L < 6.3E+00 < 5.7E+00 < 1 .2E+01 < 6.4E+00 < 1 .0E+01 < 5.8E+OO < 1 .1 E+01 < 1 .3E+01 < 6.1 E+O0 < 6.4E+OO < 3.4E+01 < 1 .3E+01 MW-1 1 0 1 1 /8/2022 pCi/L < 6.6E+00 < 6.3E+00 < 1 .2E+01 < 6.1 E+00 < 1 .4E+01 < 8.7E+OO < 9.7E+00 < 1 .4E+01 < 7.4E+00 < 5.0E+00 < 3.7E+01 < 1 .0E+01 MW-1 1 2 1 1 /8/2022 pCi/L < 5.2E+00 < 5.3E+00 < 1 . 1 E+01 < 5.6E+00 < 1 .3E+01 < 7.0E+00 < 1 .0E+01 < 1 .4E+01 < 5.4E+00 < 5.0E+00 < 3.1 E+01 < 8.7E+00 MW-1 14 1 1 /8/2022 pCi/L < 5.4E+00 < 6.6E+00 < 8.4E+00 < 8.4E+00 < 1 .2E+01 < 6.5E+00 < 1 .3E+01 < 1 .5E+01 < 6.3E+00 < 6.7E+00 < 4.2E+01 < 1 .3E+01 MW-1 1 6 1 1 /8/2022 pCi/L < 4.9E+00 < 6.2E+00 < 1 .3E+01 < 5.8E+00 < 1 .3E+01 < 5.4E+OO < 1 .2E+01 < 1 .3E+01 < 5.9E+00 < 5.8E+00 < 3.5E+01 < 1 .4E+01 MW-1 1 8 1 1 /8/2022 pCi/L < 5.1 E+00 < 7.5E+00 < 1 .7E+01 < 8.3E+00 < 1 .3E+01 < 7.BE+OO < 1 .2E+01 < 1 .4E+01 < 6.5E+OO < 6.4E+00 < 4.0E+01 < 1 . 1 E+01 MW-1 24 1 1 /8/2022 pCi/L < 5.9E+00 < 4.6E+00 < 1 . 1 E+01 < 7.2E+00 < 1 .4E+01 < 6.6E+OO < 9.5E+00 < 1 .4E+01 < 6.4E+O0 < 6.1 E+00 < 3.2E+01 < 1 . 1 E+01 MW- 1 25 1 1 /8/2022 pCi/L < 6.7E+00 < 5.6E+00 < 1 .3E+01 < 5.9E+00 < 1 .3E+01 < 6.7E+OO < 9.8E+00 < 1 .5E+01 < 6.2E+00 < 5.7E+00 < 3.2E+01 < 1 . 1 E+01 MW-137 1 1 /8/2022 pCi/L < 6.2E+00 < 6.0E+00 < 1 .2E+01 < 6.8E+00 < 1 .2E+01 < 7.4E+00 < 1 . 1 E+01 < 1 .2E+01 < 7.0E+00 < 6.2E+00 < 2.5E+01 < 1 .4E+01 MW-1 37 1 1 /8/2022 pCi/L < 6.7E+00 < 5.3E+00 < 1 . 1 E+01 < 5.9E+00 < 1 .4E+01 < 6.2E+00 < 1 .0E+01 < 1 .3E+01 < 6.6E+00 < 6.5E+00 < 3.5E+01 < 8.9E+00 MW-141 1 1 /8/2022 pCi/L < 7.3E+00 < 7.0E+00 < 1 .3E+01 < 4.5E+00 < 1 .5E+01 < 7.6E+OO < 1 .0E+01 < 1 .3E+01 < 6.7E+00 < 7.4E+OO < 4.4E+01 < 1 .3E+01 MW-1 42 1 1 /8/2022 pCi/L < 6.3E+00 < 6.3E+00 < 1 .3E+01 < 6.1 E+00 < 1 .6E+01 < 6.9E+00 < 1 . 1 E+01 < 1 .4E+01 < 6.8E+00 < 6.5E+O0 < 3.3E+01 < 1 .3E+01 MW-1 42 1 1 /8/2022 pCi/L < 7.6E+OO < 6.4E+00 < 1 .4E+01 < 6.0E+OO < 1 .4E+01 < 8.4E+00 < 1 .0E+01 < 1 .4E+01 < 7.1 E+OO < 8.5E+00 < 4.0E+01 < 1 . 1 E+01 MW-144 1 1 /8/2022 pCi/L < 7.2E+00 < 6.9E+00 < 1 .3E+01 < 6.5E+OO < 1 . 1 E+01 < 7.2E+00 < 9.4E+OO < 1 .4E+01 < 5.9E+00 < 7.1 E+OO < 3.6E+01 < 1 .2E+01 MW-1 46 1 1/8/2022 pCi/L < 5.7E+00 < 5.8E+00 < 9.4E+00 < 6.8E+00 < 1 . 1 E+01 < 7.0E+00 < 1 .0E+01 < 1 .4E+01 < 6.7E+00 < 5.6E+00 < 3.3E+01 < 1 .2E+01 MW-147 1 1/8/2022 pCi/L < 6.9E+00 < 6.6E+00 < 1 .8E+01 < 7.0E+00 < 1 . 5E+01 < 5.8E+00 < 1 .0E+01 < 1 .4E+01 < 8.0E+00 < 6.3E+00 < 3.5E+01 < 1 .3E+01 MW-1 48 1 1 /8/2022 pCi/L < 5.1 E+00 < 6.2E+00 < 1 .7E+01 < 7.5E+OO < 1 .5E+01 < 7.6E+00 < 1 .3E+01 < 1 .0E+01 < 6.7E+00 < 7.1 E+00 < 3.6E+01 < 8.5E+00

RBG-48220 I Rev. 2022 I Page 55 of 70 Annual Radioactive Effluent Release Report Attachment 1 Page 1 2 of 27 Groundwater Monitoring Well Sampling Results Table 1 7, Gamma Isotopic Results Station ID Sample Date Units MN-54 CO-58 FE-59 CO-60 ZN-65 NB-95 ZR-95 1-131 CS-134 CS-137 BA-140 LA-140 MW-153 1 1 /8/2022 pCi/L < 6.9E+00 < 5.9E+00 < 1 .3E+01 < 7.4E+OO < 1 .2E+01 < 8.0E+OO < 1 .2E+01 < 1 .3E+01 < 6.7E+OO < 6.0E+00 < 3.SE+01 < 9.9E+00 MW-1 58 1 1 /8/2022 pCi/L < 5.8E+00 < 6.4E+00 < 1 . 1 E+01 < 7.6E+OO < 1 .2E+01 < 8.1 E+OO < 1 .4E+01 < 1 .3E+01 < 7.3E+00 < 6.0E+OO < 3.5E+01 < 1 .3E+01 MW-159 1 1 /8/2022 pCi/L < 5.6E+00 < 7.8E+00 < 1 .4E+01 < 7.2E+00 < 1 .7E+01 < 5.1 E+00 < 8.5E+00 < 1 .4E+01 < 8.6E+00 < 7.8E+00 < 4.4E+01 < 1 .5E+01 MW- 1 61 1 1/8/2022 pCi/L < 6.0E+00 < 5.0E+00 < 1 .2E+01 < 5.1 E+00 < 1 .4E+01 < 6.2E+00 < 9.1 E+00 < 1 .2E+01 < 7.2E+00 < 7.SE+00 < 4.0E+01 < 1 .4E+01 MW- 1 61 1 1 /8/2022 pCi/L < 7.4E+00 < 6.1 E+00 < 1 .2E+01 < 6.6E+OO < 1 .2E+01 < 6.8E+OO < 1 .0E+01 < 1 .4E+01 < 4.4E+OO < 5.9E+00 < 3.6E+01 < 1 .2E+01 MW-1 62 1 1 /8/2022 pCi/L < 5.0E+00 < 5.2E+00 < 9.7E+OO < 5.6E+OO < 9.9E+00 < 5.2E+OO < 8.6E+00 < 1 .2E+01 < 5.2E+OO < 6.SE+00 < 2.7E+01 < 9.1 E+00 MW-1 74 1 1 /8/2022 pCi/L < 4.3E+00 < 5.2E+00 < 1 .3E+01 < 6.0E+OO < 1 .3E+01 < 5.8E+OO < 1 . 1 E+01 < 1 . 1 E+01 < 7.4E+OO < 5.3E+00 < 3.3E+01 < 1 .0E+01 MW-221 1 1 /8/2022 pCi/L < 7.4E+00 < 6.9E+00 < 1 . 1 E+01 < 5.1 E+OO < 1 .5E+01 < 7.7E+OO < 1 . 1 E+01 < 1 .4E+01 < 7.0E+OO < 5.9E+00 < 3.9E+01 < 1 . 2E+01 MW-223 1 1/8/2022 pCi/L < 4.8E+00 < 5.1 E+00 < 1 .4E+01 < 5.7E+00 < 1 .3E+01 < 6.7E+00 < 9.4E+00 < 1 .3E+01 < 6.9E+00 < 5.SE+00 < 3.2E+01 < 8.8E+00 PZ-01 1 1 /8/2022 pCi/L < 4.8E+00 < 5.6E+00 < 1 .3E+01 < 6.6E+00 < 1 .2E+01 < 7.4E+00 < 8.5E+00 < 1 .2E+01 < 6.9E+00 < 5.SE+00 < 3.0E+01 < 1 .3E+01 MW-04 1 1 /9/2022 pCi/L < 5.4E+00 < 5.SE+00 < 1 .3E+01 < 5.9E+00 < 9.8E+OO < 6.2E+00 < 1 . 1 E+01 < 1 .2E+01 < 5.8E+00 < 5.7E+OO < 3.3E+01 < 1 . 1 E+01 MW-05 1 1 /9/2022 pCVL < 5.9E+00 < 5.0E+00 < 1 .2E+01 < 6.1 E+00 < 1 .2E+01 < 7.0E+OO < 1 .3E+01 < 9.7E+00 < 6.0E+O0 < 5.0E+OO < 3.0E+01 < 1 .3E+01 MW-08 1 1 /9/2022 pCi/L < 7.2E+00 < 7.9E+00 < 1 . 1 E+01 < 7.9E+00 < 1 .6E+01 < 7.7E+00 < 1 .4E+01 < 1 .4E+01 < 7.7E+00 < 7.1 E+OO < 3.7E+01 < 1 .4E+01 MW-1 00 1 1 /9/2022 pCi/L < 5.8E+OO < 5.9E+00 < 1 .4E+01 < 7.8E+OO < 1 .4E+01 < 6.6E+00 < 9.0E+OO < 1 .2E+01 < 7.8E+00 < 7.3E+OO < 2.8E+01 < 9.7E+00 MW-103 1 1 /9/2022 pCi/L < 6.3E+00 < 7.3E+00 < 1 .2E+01 < 7.6E+00 < 1 .3E+01 < 6.3E+00 < 1 .2E+01 < 9.9E+00 < 8.1 E+00 < 6.4E+00 < 3.2E+01 < 1 .2E+01 MW- 1 04 1 1 /9/2022 pCi/L < 6 . 1 E+00 < 5.2E+00 < 9.7E+00 < 8.7E+00 < 1 .4E+01 < 6.6E+00 < 1 . 1 E+01 < 1 .2E+01 < 9.0E+00 < 8.SE+00 < 3.6E+01 < 1 .4E+01 MW-1 1 1 1 1 /9/2022 pCi/L < 4.9E+00 < 5.0E+00 < 1 .0E+01 < 7.6E+OO < 1 .0E+01 < 5.7E+OO < 1 . 1 E+01 < 1 .0E+01 < 6.0E+00 < 5.7E+OO < 2.7E+01 < 8.4E+00

RBG-48220 I Rev. 2022 I Page 56 of 70 Annual Radioactive Effluent Release Report Attachment 1 Page 13 of 27 Groundwater Monitoring Well Sampling Results Table 17, Gamma Isotopic Results Station ID Sample Date Units MN-54 CO-58 FE-59 CO-60 ZN-65 NB-95 ZR-95 1-131 CS-134 CS-137 BA-140 LA-140 MW-1 20 1 1 /9/2022 pCi/L < 7.0E+00 < 9.1 E+00 < 1 . 1 E+01 < 9.3E+00 < 1 .0E+01 < 7.1 E+00 < 1 .4E+01 < 1 .4E+01 < 7.4E+00 < 8.SE+00 < 3.7E+01 < 9.2E+00 MW-122R 1 1 /9/2022 pCi/L < 4.8E+00 < 5.4E+00 < 1 .3E+01 < 7.2E+00 < 1 . 1 E+01 < 5.9E+00 < 1 . 1 E+01 < 1 .0E+01 < 6.1 E+00 < 5.7E+00 < 2.8E+01 < 8.2E+00 MW-126 1 1 /9/2022 pCi/L < 7.0E+00 < 7.3E+00 < 1 .6E+01 < 8.9E+00 < 1 .8E+01 < 8.1 E+00 < 1 .5E+01 < 1 .4E+01 < 8.0E+00 < 8.0E+00 < 4.0E+01 < 1 . 1 E+01 MW-1 28 1 1 /9/2022 pCi/L < 7.4E+00 < 6.6E+00 < 1 .3E+01 < 6.4E+00 < 1 .3E+01 < 7.2E+00 < 1 .2E+01 < 1 .5E+01 < 7.SE+00 < 8.8E+00 < 3.4E+01 < 7.7E+00 MW- 1 30 1 1 /9/2022 pCi/L < 5.9E+00 < 5.SE+00 < 1 .7E+01 < 6.0E+00 < 1 . 1 E+01 < 5.1 E+00 < 1 . 1 E+01 < 1 . 1 E+01 < 6.9E+00 < 5.8E+00 < 3.3E+01 < 1 . 1 E+01 MW-131 1 1 /9/2022 pCi/L < 7.8E+00 < 8.0E+00 < 1 .3E+01 < 6.6E+00 < 1 .5E+01 < 9.0E+00 < 1 .4E+01 < 1 . 1 E+01 < 8.1 E+00 < 6.SE+00 < 2.9E+01 < 1 .2E+01 MW-1 39 1 1 /9/2022 pCi/L < 7.8E+00 < 7.4E+00 < 1 .2E+01 < 5.9E+00 < 1 . 1 E+01 < 7.6E+00 < 1 .3E+01 < 9.9E+00 < 6.9E+00 < 7.6E+00 < 3. 1 E+01 < 1 . 1 E+01 MW- 1 4 1 1 /9/2022 pCi/L < 6.6E+00 < 6.SE+00 < 1 .4E+01 < 9.4E+00 < 1 .2E+01 < 6.7E+00 < 1 .4E+01 < 1 .2E+01 < 8.SE+00 < 7.2E+00 < 2.8E+01 < 1 .0E+01 MW-1 51 1 1 /9/2022 pCi/L < 7.0E+00 < 6.0E+00 < 1 .3E+01 < 5.0E+00 < 8.6E+00 < 5.SE+00 < 1 .1 E+01 < 1 .2E+01 < 4.7E+00 < 5.8E+00 < 2.8E+01 < 7.8E+00 MW-1 55 1 1 /9/2022 pCi/L < 6.7E+00 < 6.9E+00 < 1 .3E+01 < 6.4E+00 < 1 .3E+01 < 6.SE+00 < 1 . 1 E+01 < 1 .4E+01 < 5.8E+00 < 7. 1 E+00 < 3.1 E+01 < 1 .0E+01 MW-1 56 1 1 /9/2022 pCi/L < 4.9E+00 < 6.0E+00 < 1 .6E+01 < 5.SE+00 < 1 .0E+01 < 6.8E+00 < 1 .3E+01 < 1 .4E+01 < 6.7E+00 < 6.6E+00 < 3.9E+01 < 1 .0E+01 MW-157 1 1 /9/2022 pCi/L < 6.3E+00 < 7.1 E+00 < 1 .4E+01 < 6.4E+00 < 1 .4E+01 < 6.7E+00 < 1 .0E+01 < 1 .5E+01 < 6.2E+00 < 7.2E+00 < 3.5E+01 < 1 .5E+01 MW-1 64 1 1 /9/2022 pCi/L < 6.6E+00 < 6.9E+00 < 1 .2E+01 < 5.3E+00 < 1 .3E+01 < 6.6E+00 < 1 . 1 E+01 < 1 .2E+01 < 7.9E+00 < 6.8E+00 < 3.2E+01 < 1 .2E+01 MW-165 1 1 /9/2022 pCi/L < 7.2E+00 < 7.6E+00 < 1 .7E+01 < 8.7E+00 < 1 .6E+01 < 8.0E+00 < 1 . 1 E+01 < 1 .3E+01 < 8.7E+00 < 7.9E+00 < 3.6E+01 < 1 .4E+01 MW-167 1 1 /9/2022 pCi/L < 4.3E+00 < 6.9E+00 < 1 .2E+01 < 5.0E+00 < 1 . 1 E+01 < 5.6E+00 < 7.6E+00 < 9.6E+00 < 5.8E+00 < 6.4E+00 < 2.9E+01 < 1 .2E+01 MW-170 1 1 /9/2022 pCi/L < 7.7E+00 < 8.1 E+00 < 1 .7E+01 < 8.7E+00 < 1 . 1 E+01 < 7.1 E+00 < 1 .5E+01 < 1 .3E+01 < 8.8E+00 < 7.8E+00 < 4.2E+01 < 1 . 1 E+01 MW- 1 78 1 1 19/2022 pCi/L < 4.4E+00 < 7.0E+00 < 1 .5E+01 < 5.3E+00 < 1 .3E+01 < 6.SE+00 < 1 .2E+01 < 1 .3E+01 < 5.1 E+00 < 8.6E+00 < 3.6E+01 < 9.1 E+00

RBG-48220 I Rev. 2022 I Page 57 of 70 Annual Radioactive Effluent Release Re_p_ort Attachment 1 Page 1 4 of 27 Groundwater Monitoring Well Sampling Results Table 1 7, Gamma Isotopic Results Station ID Sample Date Units MN-54 CO-58 FE-59 CO-60 ZN-65 NB-95 ZR-95 1-131 CS-134 CS-137 BA-140 LA-140 MW-1 79 1 1 /9/2022 pCi/L < 3.6E+00 < 3.SE+00 < 8.2E+00 < 3.7E+00 < 7.6E+00 < 3.9E+00 < 6.6E+00 < 8.0E+00 < 3.9E+00 < 3.9E+00 < 2.0E+01 < 6.4E+00 MW- 1 8 1 1 /9/2022 pCi/L < 7.SE+00 < 8.SE+00 < 1 .6E+01 < 6.6E+00 < 1 . 7E+01 < 8.SE+00 < 1 .4E+01 < 1 .3E+01 < 9.1 E+00 < 7.3E+00 < 4.0E+01 < 1 .4E+01 MW-1 80 1 1/9/2022 pCi/L < 5.SE+00 < 5.3E+00 < 1 .7E+01 < 6.0E+00 < 1 .4E+01 < 5.7E+00 < 9.2E+00 < 1 . 1 E+01 < 6.SE+00 < 6.SE+00 < 3.3E+01 < 9.6E+00 MW-1 82 1 1 /9/2022 pCi/L < 7.1 E+00 < 5.9E+00 < 1 .3E+01 < 7.6E+00 < 1 .3E+01 < 6.6E+00 < 1 .2E+01 < 1 . 1 E+01 < 7.6E+00 < 7.6E+00 < 3.0E+01 < 9.SE+00 MW-185 1 1 /9/2022 pCi/L < 5.9E+00 < 5.9E+00 < 1 .5E+01 < 8.SE+00 < 1 .4E+01 < 6.SE+00 < 1 .3E+01 < 1 .2E+01 < 6.SE+00 < 6.SE+00 < 3.5E+01 < 9.4E+00 MW-187 1 1 /9/2022 pCi/L < 9.1 E+00 < 6.2E+00 < 1 .6E+01 < 7.4E+00 < 1 . 6E+01 < 6.0E+00 < 1 .5E+01 < 1 .2E+01 < 9.2E+00 < 7.7E+00 < 3.5E+01 < 1 .0E+01 MW-201 1 1 /9/2022 pCi/L < 9.3E+00 < 7.2E+00 < 1 .5E+01 < 5.7E+00 < 8. 1 E+00 < 6.6E+00 < 1 .4E+01 < 1 .3E+01 < 8.0E+00 < 6.1 E+00 < 3.7E+01 < 1 . 1 E+01 MW-205 1 1 /9/2022 pCi/L < 5.2E+00 < 6.1 E+00 < 1 .5E+01 < 7.3E+00 < 1 .3E+01 < 8.1 E+00 < 1 . 1 E+01 < 1 .4E+01 < 6.9E+00 < 6.2E+00 < 3.2E+01 < 1 .4E+01 MW-205 1 1 /9/2022 pCi/L < 7.0E+00 < 7.7E+00 < 1 .4E+01 < 7.6E+00 < 1 .7E+01 < 5.7E+00 < 1 .3E+01 < 1 . 1 E+01 < 7.6E+00 < 8.3E+00 < 3.5E+01 < 1 .4E+01 MW-209 1 1 /9/2022 pCi/L < 6.0E+00 < 7.1 E+00 < 1 .3E+01 < 8.SE+00 < 8.SE+00 < 7.2E+00 < 1 . 1 E+01 < 1 .2E+01 < 9.1 E+00 < 6.SE+00 < 3.8E+01 < 1 .5E+01 MW-209 1 1 /9/2022 pCi/L < 6.6E+00 < 5.0E+00 < 1 .5E+01 < 5.1 E+00 < 1 .0E+01 < 7.1 E+00 < 1 . 1 E+01 < 1 .0E+01 < 7.2E+00 < 6.3E+00 < 3.1 E+01 < 5.7E+00 MW-2 1 1 1 1 /9/2022 pCi/L < 6.3E+00 < 6.SE+00 < 1 .7E+01 < 8.6E+00 < 1 . 1 E+01 < 8.7E+00 < 1 . 1 E+01 < 1 .2E+01 < 8.3E+00 < 8.SE+00 < 3.9E+01 < 7.6E+00 MW-21 1 1 1 /9/2022 pCi/L < 7. 1 E+00 < 4.1 E+00 < 1 .5E+01 < 7.3E+00 < 1 .4E+01 < 7.9E+00 < 9.2E+00 < 1 .4E+01 < 8.2E+00 < 6.SE+00 < 3.7E+01 < 9.2E+00 MW-21 3 1 1 /9/2022 pCi/L < 5.SE+00 < 6.3E+00 < 1 . 1 E+01 < 7.6E+00 < 1 .2E+01 < 6.9E+00 < 1 . 1 E+01 < 1 . 1 E+01 < 5.9E+00 < 7.7E+00 < 3.3E+01 < 1 .2E+01 MW-2 1 9 1 1 /9/2022 pCi/L < 8.4E+00 < 6.6E+00 < 1 .5E+01 < 7.1 E+00 < 1 .5E+01 < 8.0E+00 < 1 . 1 E+01 < 1 . 1 E+01 < 9.3E+00 < 7.9E+00 < 1 .9E+01 < 1 .0E+01 MW-225 1 1 /9/2022 pCi/L < 6.SE+00 < 8.1 E+00 < 1 .8E+01 < 9.0E+00 < 1 .6E+01 < 8.2E+00 < 1 .5E+01 < 9.4E+00 < 8.3E+00 < 7.SE+00 < 3.8E+01 < 1 .2E+01 MW-225 1 1 /9/2022 pCi/L < 7.SE+00 < 6.4E+00 < 1 .2E+01 < 6.9E+00 < 1 .5E+01 < 6.2E+00 < 1 . 1 E+01 < 1 .0E+01 < 5.1 E+00 < 6.6E+00 < 2.4E+01 < 1 .4E+01

RBG-48220 l Rev. 2022 I Page 58 of 70 Annual Radioactive Effluent Release Reort Attachment 1 Page 1 5 of 27 Groundwater Monitoring Well Sampling Results Table 1 7, Gamma Isotopic Results Station ID Sample Date Units MN-54 CO-58 FE-59 CO-60 ZN-65 NB-95 ZR-95 1-131 CS-134 CS-137 BA-140 LA-140 MW-231 1 1 /9/2022 pCi/L < 6.7E+00 < 8.5E+00 < 1 .7E+01 < 1 . 1 E+01 < 1 . 8E+01 < 8.3E+00 < 1 . 1 E+01 < 1 .4E+01 < 5.7E+00 < 7.7E+00 < 2.7E+01 < 1 . 1 E+01 MW-233 1 1 /9/2022 pCi/L < 8.1 E+00 < 7.3E+00 < 1 .0E+01 < 9.1 E+00 < 1 .6E+01 < 8.2E+00 < 1 . 1 E+01 < 1 .2E+01 < 8.3E+00 < 8.6E+00 < 3.6E+01 < 1 .5E+01 MW-235 1 1 /9/2022 pCi/L < 6.4E+00 < 7.7E+00 < 1 .5E+01 < 8.7E+00 < 1 . 1 E+01 < 5.6E+00 < 9.7E+00 < 1 . 1 E+01 < 5.7E+00 < 7.4E+00 < 3.9E+01 < 1 .4E+01 PZ-03 1 1 /9/2022 pCi/L < 7.SE+00 < 7.4E+00 < 1 .2E+01 < 8.9E+00 < 1 . 2E+01 < 8.7E+00 < 1 .2E+01 < 1 .4E+01 < 5.4E+00 < 7.2E+00 < 3.2E+01 < 1 .2E+01 T-1 4 1 1 /9/2022 pCi/L < 7.0E+00 < 5.0E+00 < 1 .7E+01 < 7.BE+00 < 1 .6E+01 < 9.6E+00 < 1 .3E+01 < 1 . 1 E+01 < 8.7E+00 < 7.6E+00 < 4.0E+01 < 1 .0E+01 MW-1 06 1 1 /1 0/2022 pCi/L < 7.0E+00 < 6.2E+00 < 1 .3E+01 < 6.BE+00 < 1 .4E+01 < 5.6E+00 < 1 .3E+01 < 1 . 1 E+01 < 7.2E+00 < 6.3E+00 < 3.5E+01 < 9.3E+00 MW- 1 07 1 1 /10/2022 pCi/L < 5.6E+00 < 7.3E+00 < 1 .3E+01 < 7.6E+00 < 1 .2E+01 < 5.6E+00 < 1 .5E+01 < 1 .3E+01 < 7.2E+00 < 6.1 E+00 < 3.5E+01 < 9.2E+00 MW-1 08 1 1 /1 0/2022 pCi/L < 6.4E+00 < 7.1 E+00 < 1 . 1 E+01 < 7.4E+00 < 1 .2E+01 < 5.SE+00 < 8.6E+00 < 1 .2E+01 < 9.0E+00 < 7.BE+00 < 2.9E+01 < 1 . 5E+01 MW-132 1 1 /1 0/2022 pCi/L < 6.SE+00 < 8.1 E+00 < 1 .6E+01 < 9.4E+00 < 1 .4E+01 < 7.1 E+00 < 1 .3E+01 < 1 .3E+01 < 7.7E+00 < 6.4E+00 < 3.9E+01 < 1 .2E+01 MW- 1 34 1 1 /1 0/2022 pCi/L < 6.7E+00 < 7.2E+00 < 1 .6E+01 < 7.7E+00 < 1 .0E+01 < 5.8E+00 < 1 . 1 E+01 < 1 .1 E+01 < 1 .0E+01 < 7.0E+00 < 3.4E+01 < 1 .4E+01 MW- 1 69 1 1 /1 0/2022 pCi/L < 6.4E+00 < 5.9E+00 < 1 .3E+01 < 7.6E+00 < 1 .7E+01 < 6.8E+00 < 1 .3E+01 < 9.BE+00 < 8.6E+00 < 9.3E+00 < 3.7E+01 < 1 .2E+01 MW- 1 72 1 1 /10/2022 pCi/L < 7.7E+00 < 7.SE+00 < 1 .3E+01 < 8.0E+00 < 1 .8E+01 < 8.7E+00 < 1 .3E+01 < 1 .4E+01 < 8.7E+00 < 6.7E+00 < 3.8E+01 < 8.6E+00 MW-188 1 1/10/2022 pCi/L < 8.2E+00 < 5.0E+00 < 1 . 1 E+01 < 7.6E+00 < 9.6E+00 < 6.2E+00 < 1 .4E+01 < 1 . 1 E+01 < 6.3E+00 < 6.BE+00 < 3.3E+01 < 1 .2E+01 MW-207 1 1/10/2022 pCi/L < 5.2E+00 < 8.1 E+00 < 1 .5E+01 < 8.BE+00 < 1 .3E+01 < 7.SE+00 < 1 .6E+01 < 1 .2E+01 < 7.SE+00 < 8.4E+00 < 2.9E+01 < 1 . 1 E+01 MW-2 1 5 1 1 /1 0/2022 pCi/L < 6.6E+00 < 5.4E+00 < 1 .9E+01 < 8.7E+00 < 1 .6E+01 < 7.7E+00 < 1 .2E+01 < 1 . 1 E+01 < 7.3E+00 < 5.3E+00 < 3.6E+01 < 7. 1 E+00 MW-2 1 7 1 1 /1 0/2022 pCi/L < 6.7E+00 < 6.2E+00 < 1 .5E+01 < 9.2E+00 < 1 .5E+01 < 7.7E+00 < 1 .4E+01 < 1 .3E+01 < 7.SE+00 < 7.0E+00 < 4.1 E+01 < 9.9E+00 MW-227 1 1 /1 0/2022 pCi/L < 5.2E+00 < 6.7E+00 < 1 .3E+01 < 7.3E+00 < 1 .6E+01 < 6.6E+00 < 1 .3E+01 < 1 .0E+01 < 5.2E+00 < 6.9E+00 < 2.7E+01 < 6.7E+00

RBG-48220 J Rev. 2022 J Page 59 of 70 Annual Radioactive Effluent Release Re__Rort Attachment 1 Page 1 6 of 27 Groundwater Monitoring Well Sampling Results Table 17, Gamma Isotopic Results Station ID Sample Date Units MN-54 CO-58 FE-59 CO-60 ZN-65 NB-95 ZR-95 1-131 CS-134 CS-137 BA-140 LA-140 MW-229 1 1 /1 0/2022 pCi/L < 6.6E+OO < 8.7E+00 < 1 .3E+01 < 6.0E+00 < 1 .2E+01 < 7.2E+00 < 1 . 1 E+01 < 1 .4E+01 < 7.7E+00 < 8.7E+OO < 3.2E+01 < 1 .3E+01 SW-1 03 1 1 /1 0/2022 pCi/L < 5.7E+00 < 8.5E+00 < 1 .3E+01 < 4.2E+OO < 1 .7E+01 < 6.1 E+OO < 1 .0E+01 < 1 .2E+01 < 7.9E+O0 < 6.2E+00 < 3.3E+01 < 1 .3E+01 Table 1 8, Hard to Detect Nuclides Station ID Sample Date Units FE-55 Nl-63 SR-89 SR-90 CM-242 CM-243/244 PU-238 MW-125 2/1 /2022 pCi/L < 7.5E+01 < 2.0E+01 < 7.5E+OO < 8.SE-01 < 2.2E-01 < 5.1 E-02 < 3.9E-01 MW-1 57 1 1 /912022 pCi/L < 6.2E+01 < 1 .7E+01 < 5.6E+00 < 2.2E+00 < 1 .3E-01 < 3.4E-02 < 7.7E-02

RBG-48220 I Rev. 2022 Annual Radioactive Effluent Release Report I Page 60 of 70 Page 17 of 27 Groundwater Monitoring Well Sampling Results Table 19, Tritium Analysis Results Station ID Start Date Units H-3 Station ID Start Date Units H-3 MW-100 . 2/1 /2022 pCi/L < 5.4E+02 MW-1 56 2/1 /2022 pCi/L 1 . 1 0E+04 MW-124 2/1/2022 pCi/L 9.1 0E+04 MW-157 2/1/2022 pCi/L 2.00E+0S MW-125 2/1 /2022 pCi/L 3.70E+05 MW-1 58 2/1 /2022 pCi/L 2.70E+05 MW-126 2/1/2022 pCi/L 2.90E+04 MW-159 2/1 /2022 pCi/L 4.50E+04 MW-142 2/1 /2022 pCi/L < 5.5E+02 MW-162 2/1/2022 pCi/L < 5.6E+02 MW-142 2/1/2022 pCi/L < 5.3E+02 MW-164 2/1 /2022 pCi/L < 5.5E+02 MW-144 2/1 /2022 pCi/L 1 . 1 0E+03 MW-165 2/1/2022 pCi/L < 5.9E+02 MW-146 2/1 /2022 pCi/L 7.70E+04 MW-1 78 2/1 /2022 pCi/L 7.60E+03 MW-147 2/1/2022 pCi/L 5.70E+03 MW-1 78 2/1 /2022 pCi/L 9.30E+03 MW-148 2/1/2022 pCi/L 2.30E+04 MW-179 2/1/2022 pCi/L 2.00E+0S MW-151 2/1 /2022 pCi/L < 5.7E+02 MW-185 2/1 /2022 pCi/L < 5.3E+02 MW-155 2/1/2022 pCi/L 1 . 1 0E+05 MW-1 86 2/1/2022 pCi/L < 5.4E+02

RBG-48220 I Rev. 2022 I Page 61 of 70 Annual Radioactive Effluent Release Report Page 1 8 of 27 Groundwater Monitoring Well Sampling Results Table 1 9, Tritium Analysis Results Station ID Start Date Units H-3 Station ID Start Date Units H-3 MW-187 2/1 /2022 pCi/L < 5.4E+02 MW-153 2/2/2022 pCi/L 1 .60E+03 MW-188 2/1 /2022 pCi/L < 5.1 E+02 MW-161 2/2/2022 pCi/L 3.70E+03 MW-21 1 2/1/2022 pCi/L 1 .1 0E+03 MW-1 70 2/2/2022 pCi/L < 5.4E+02 MW-21 1 2/1/2022 pCi/L 1 .00E+03 MW-182 2/2/2022 pCi/L < 5.1 E+02 MW-1 1 0 2/2/2022 pCi/L 1 .90E+04 MW-209 2/2/2022 pCi/L < 5.4E+02 MW-1 1 2 2/2/2022 pCi/L 2.60E+03 MW-221 2/2/2022 pCi/L 1 .30E+03 MW-1 1 4 2/2/2022 pCi/L 2.1 0E+03 MW-223 2/2/2022 pCi/L < 5.3E+02 MW-1 1 6 2/2/2022 pCi/L 5.40E+03 MW-223 2/2/2022 pCi/L < 5.6E+02 MW- 1 1 8 2/2/2022 pCi/L 4.00E+03 PZ-01 2/2/2022 pCi/L 1 .60E+04 MW-137 2/2/2022 pCi/L 5.40E+03 SW-102 2/2/2022 pCi/L < 5.6E+02 MW-139 2/2/2022 pCi/L < 5.3E+02 SW-103 2/2/2022 pCi/L < 5.7E+02 MW-141 2/2/2022 pCi/L 2.1 0E+03 SW-104 2/2/2022 pCi/L < 5.5E+02

RBG-48220 I Rev. 2022 J Page 62 of 70 Annual Radioactive Effluent Release Reort Page 1 9 of 27 Groundwater Monitoring Well Sampling Results Table 1 9, Tritium Analysis Results Station ID Start Date Units H-3 Station ID Start Date Units H-3 MW-148 2/28/2022 pCi/L 1 . 1 0E+04 MW-1 61 5/24/2022 pCi/L 1 .90E+03 MW-1 24 5/24/2022 pCi/L 4.80E+04 MW-162 5/24/2022 pCi/L < 4.9E+02 MW-125 5/24/2022 pCi/L 2.70E+05 MW-185 5/24/2022 pCi/L < 4.9E+02 MW-142 5/24/2022 pCi/L 9.90E+02 MW-205 5/24/2022 pCi/L < 5.2E+02 MW-142 5/24/2022 pCi/L 6.20E+02 MW-227 5/24/2022 pCi/L < 5.4E+02 MW-144 5/24/2022 pCi/L < 4.8E+02 MW-100 5/25/2022 pCi/L < 4.9E+02 MW-146 5/24/2022 pCi/L 5.50E+04 MW-106 5/25/2022 pCi/L < 6.9E+02 MW-147 5/24/2022 pCi/L 4.40E+03 MW-1 1 0 5/25/2022 pCi/L 1 .B0E+04 MW-148 5/24/2022 pCi/L 3.1 0E+03 MW-1 1 2 5/25/2022 pCi/L 2.80E+03 MW-155 5/24/2022 pCi/L 1 .20E+05 MW-1 1 4 5/25/2022 pCi/L 1 .60E+03 MW-158 5/24/2022 pCi/L 2.1 0E+05 MW-1 1 6 5/25/2022 pCi/L 4.00E+03 MW- 1 59 5/24/2022 pCi/L 3.90E+04 MW-1 1 8 5/25/2022 pCi/L 3.1 0E+03

RBG-48220 I Rev. 2022 I Page 63 of 70 Annual Radioactive Effluent Release Report Page 20 of 27 Groundwater Monitoring Well Sampling Results Table 1 9, Tritium Analysis Results Station ID Start Date Units H-3 Station ID Start Date Units H-3 MW-120 5/25/2022 pCi/L < 7.0E+02 MW-1 53 5/25/2022 pCi/L 1 .60E+03 MW-122R 5/25/2022 pCi/L < 4.8E+02 MW-1 56 5/25/2022 pCi/L 1 .20E+04 MW-122R 5/25/2022 pCi/L < 5.2E+02 MW-157 5/25/2022 pCi/L 2.30E+05 MW-126 5/25/2022 pCi/L 1 .50E+04 MW-1 64 5/25/2022 pCi/L < 4.9E+02 MW-1 28 5/25/2022 pCi/L < 5.5E+02 MW-165 5/25/2022 pCi/L < 5.2E+02 MW-130 5/25/2022 pCi/L < 5.4E+02 MW-167 5/25/2022 pCi/L < 5.0E+02 MW-131 5/25/2022 pCi/L < 5.3E+02 MW-1 70 5/25/2022 pCi/L < 5.1 E+02 MW-132 5/25/2022 pCi/L < 5.2E+02 MW-1 78 5/25/2022 pCi/L 7.20E+03 MW-137 5/25/2022 pCi/L 3.50E+03 MW-1 79 5/25/2022 pCi/L 4.80E+04 MW-139 5/25/2022 pCi/L < 5.4E+02 MW-180 5/25/2022 pCi/L < 5.5E+02 MW-141 5/25/2022 pCi/L 1 .60E+03 MW-1 82 5/25/2022 pCi/L < 5.3E+02 MW-151 5/25/2022 pCi/L < 5.1 E+02 MW-1 86 5/25/2022 pCi/L < 5.2E+02

RBG-48220 I Rev. 2022 I Page 64 of 70 Annual Radioactive Effluent Release Re_p_ort Page 21 of 27 Groundwater Monitoring Well Sampling Results Table 1 9, Tritium Analysis Results Station ID Start Date Units H-3 Station ID Start Date Units H-3 MW-187 5/25/2022 pCi/L < 4.9E+02 MW-231 5/25/2022 pCi/L < 5.1 E+02 MW-188 5/25/2022 pCi/L < 5.4E+02 MW-231 5/25/2022 pCi/L < 5.1 E+02 MW-201 5/25/2022 pCi/L < 4.9E+02 MW-233 5/25/2022 pCi/L < 6.7E+02 MW-209 5/25/2022 pCi/L < 5.3E+02 MW-235 5/25/2022 pCi/L < 6.9E+02 MW-21 1 5/25/2022 pCi/L 9.00E+02 PZ-01 5/25/2022 pCi/L 1 . 70E+04 MW-21 1 5/25/2022 pCi/L 1 .00E+03 PZ-01 5/25/2022 pCi/L 1 .60E+04 MW-21 3 5/25/2022 pCi/L < 5.3E+02 PZ-03 5/25/2022 pCi/L < 5.2E+02 MW-21 5 5/25/2022 pCi/L < 5.2E+02 MW-134 5/26/2022 pCi/L < 6.9E+02 MW-21 7 5/25/2022 pCi/L < 4.8E+02 MW-169 5/26/2022 pCi/L < 6.8E+02 MW-21 9 5/25/2022 pCi/L < 6.9E+02 MW-207 5/26/2022 pCi/L < 5.4E+02 MW-221 5/25/2022 pCi/L 1 . 1 0E+03 MW-223 5/26/2022 pCi/L < 5.1 E+02 MW-225 5/25/2022 pCi/L < 5.5E+02 MW-223 5/26/2022 pCi/L < 5.2E+02

RBG-48220 J Rev. 2022 1 Page 65 of 70 Annual Radioactive Effluent Release Report Page 22 of 27 Groundwater Monitoring Well Sampling Results Table 1 9, Tritium Analysis Results Station ID Start Date Units H-3 Station ID Start Date Units H-3 MW-229 5/26/2022 pCi/L < 5.2E+02 MW-146 8/30/2022 pCi/L 4.20E+04 SW-102 5/26/2022 pCi/L < 5.5E+02 MW-1 47 8/30/2022 pCi/L 1 .30E+04 SW-103 5/26/2022 pCi/L < 6.4E+02 MW-148 8/30/2022 pCi/L < 5.7E+02 SW-104 5/26/2022 pCi/L < 7.0E+02 MW-151 8/30/2022 pCi/L < 5.8E+02 MW-100 8/30/2022 pCi/L < 5.5E+02 MW-155 8/30/2022 pCi/L 1 .40E+05 MW-1 24 8/30/2022 pCi/L 4.70E+04 MW-1 56 8/30/2022 pCi/L 1 .80E+04 MW-125 8/30/2022 pCi/L 2.60E+05 MW-157 8/30/2022 pCi/L 2.90E+05 MW-125 8/30/2022 pCi/L 2.30E+05 MW- 1 58 8/30/2022 pCi/L 1 .70E+05 MW-126 8/30/2022 pCi/L 1 .80E+04 MW-159 8/30/2022 pCi/L 5.20E+04 MW-126 8/30/2022 pCi/L 1 .60E+04 MW-162 8/30/2022 pCi/L < 5.8E+02 MW-142 8/30/2022 pCi/L 9.70E+02 MW-1 64 8/30/2022 pCi/L < 5.5E+02 MW-144 8/30/2022 pCi/L < 6.0E+02 MW-1 64 8/30/2022 pCi/L < 4.9E+02

RBG-48220 I Rev. 2022 I Page 66 of 70 Annual Radioactive Effluent Release Report Page 23 of 27 Groundwater Monitoring Well Sampling Results Table 1 9, Tritium Analysis Results Station ID Start Date Units H-3 Station ID Start Date Units H-3 MW-165 8/30/2022 pCi/L < 5.9E+02 MW-1 1 4 8/31/2022 pCi/L 1 .90E+03 MW-178 8/30/2022 pCi/L 4.20E+03 MW-1 1 6 8/31/2022 pCi/L 2.80E+03 MW- 1 79 8/30/2022 pCi/L 1 .20E+05 MW-1 1 8 8/31 /2022 pCi/L 3.1 0E+03 MW-185 8/30/2022 pCi/L < 5.5E+02 MW-137 8/31 /2022 pCi/L 6.90E+03 MW-186 8/30/2022 pCi/L < 5.4E+02 MW-139 8/31/2022 pCi/L < 5.0E+02 MW-187 8/30/2022 pCi/L < 5.5E+02 MW-141 8/31/2022 pCi/L 1 .70E+03 MW-188 8/30/2022 pCi/L < 5.5E+02 MW-153 8/31 /2022 pCi/L 1 .30E+03 MW-2 1 1 8/30/2022 pCi/L 1 .40E+03 MW-161 8/31/2022 pCi/L 2. 1 0E+03 MW-21 1 8/30/2022 pCi/L 1 . 1 0E+03 MW-1 70 8/31 /2022 pCi/L < 5.6E+02 MW-1 1 0 8/31 /2022 pCi/L 1 .70E+04 MW-182 8/31/2022 pCi/L < 5.9E+02 MW-1 1 0 8/31/2022 pCi/L 1 .80E+04 MW-209 8/31/2022 pCi/L < 5.6E+02 MW-1 1 2 8/31 /2022 pCi/L 2.30E+03 MW-221 8/31 /2022 pCi/L 1 . 1 0E+03

RBG-48220 I Rev. 2022 I Page 67 of 70 Annual Radioactive Effluent Release Report Page 24 of 27 Groundwater Monitoring Well Sampling Results Table 1 9, Tritium Analysis Results Station ID Start Date Units H-3 Station ID Start Date Units H-3 MW-223 8/31 /2022 pCi/L < 5.4E+02 MW-137 1 1/8/2022 pCVL 9.40E+03 PZ-01 8/31 /2022 pCi/L 2.60E+04 MW-137 1 1 /8/2022 pCi/L 9.40E+03 SW-102 8/31 /2022 pCi/L < 5.4E+02 MW-1 41 1 1 18/2022 pCi/L 1 .40E+03 SW-103 8/31 /2022 pCi/L < 4.6E+02 MW-142 1 1/8/2022 pCi/L 1 .00E+03 SW-104 8/31/2022 pCi/L < 4.9E+02 MW-142 1 1/8/2022 pCVL 8.40E+02 MW-1 1 0 1 1 /8/2022 pCi/L 2.30E+04 MW-144 1 1/8/2022 pCVL < 6.2E+02 MW-1 1 2 1 1/8/2022 pCi/L 2.70E+03 MW-146 1 1/8/2022 pCi/L 3.00E+04 MW-1 1 4 1 1 /8/2022 pCi/L 1 .20E+03 MW-147 1 1/8/2022 pCi/L 1 .30E+04 MW-1 1 6 1 1/8/2022 pCi/L 5.60E+03 MW-148 1 1/8/2022 pCi/L 1 .00E+03 MW-1 1 8 1 1 /8/2022 pCi/L 2.90E+03 MW-1 53 1 1/8/2022 pCi/L 1 .1 0E+03 MW-1 24 1 1/8/2022 pCi/L 9.30E+04 MW-1 58 1 1/8/2022 pCi/L 2.00E+0S MW-125 1 1 /8/2022 pCi/L 2.80E+0S MW-159 1 1/8/2022 pCVL 4.50E+04

RBG-48220 l Rev. 2022 l Page 68 of 70 Annual Radioactive Effluent Release Reort Page 25 of 27 Groundwater Monitoring Well Sampling Results Table 1 9, Tritium Analysis Results Station ID Start Date Units H-3 Station ID Start Date Units H-3 MW-161 1 1/8/2022 pCi/L 1 .30E+03 MW-104 1 1/9/2022 pCi/L < 6.2E+02 MW-161 1 1 /8/2022 pCi/L 1 .30E+03 MW-1 1 1 1 1/9/2022 pCi/L < 6.2E+02 MW-162 1 1 /8/2022 pCi/L < 6.1 E+02 MW-120 1 1/9/2022 pCi/L < 6.7E+02 MW-174 1 1/8/2022 pCi/L < 5.7E+02 MW-122R 1 1/9/2022 pCi/L < 5.7E+02 MW-221 1 1/8/2022 pCi/L 1 .30E+03 MW-1 26 1 1/9/2022 pCi/L 1 .30E+04 MW-223 1 1 /8/2022 pCi/L < 5.2E+02 MW-128 1 1/9/2022 pCi/L < 5.6E+02 PZ-01 1 1 /8/2022 pCi/L 3.1 0E+04 MW-130 1 1/9/2022 pCi/L < 6.1 E+02 MW-04 1 1/9/2022 pCi/L < 5.6E+02 MW-131 1 1/9/2022 pCi/L < 6.7E+02 MW-05 1 1 /9/2022 pCi/L < 6.0E+02 MW-139 1 1/9/2022 pCi/L < 6.0E+02 MW-08 1 1/9/2022 pCi/L < 6.0E+02 MW- 1 4 1 1/9/2022 pCi/L < 5.9E+02 MW-100 1 1 /9/2022 pCi/L < 5.7E+02 MW-151 1 1/9/2022 pCi/L < 5.6E+02 MW-103 1 1/9/2022 pCi/L < 6.4E+02 MW-155 1 1/9/2022 pCi/L 8.70E+04

RBG-48220 I Rev. 2022 I Page 69 of 70 Annual Radioactive Effluent Release Report Page 26 of 27 Groundwater Monitoring Well Sampling Results Table 1 9, Tritium Analysis Results Station ID Start Date Units H-3 Station ID Start Date Units H-3 MW-156 1 1 /9/2022 pCi/L 3.00E+04 MW-187 1 1 /9/2022 pCi/L < 6.5E+02 MW-157 1 1/9/2022 pCi/L 2.30E+05 MW-201 1 1 /9/2022 pCi/L < 6.0E+02 MW- 1 64 1 1/9/2022 pCi/L < 6.2E+02 MW-205 1 1 /9/2022 pCi/L < 5.7E+02 MW-165 1 1 /9/2022 pCi/L < 6.0E+02 MW-205 1 1 19/2022 pCi/L < 6.2E+02 MW-167 1 1 /9/2022 pCi/L < 6.4E+02 MW-209 1 1/9/2022 pCi/L < 6.2E+02 MW-170 1 1 /9/2022 pCi/L < 6.3E+02 MW-209 1 1/9/2022 pCi/L < 6.0E+02 MW-1 78 1 1 /9/2022 pCi/L 3.1 0E+03 MW-2 1 1 1 1/9/2022 pCi/L 1 .20E+03 MW-179 1 1 /9/2022 pCi/L 1 .30E+05 MW-21 1 1 1/9/2022 pCi/L 1 .20E+03 MW-1 8 1 1 /9/2022 pCi/L < 6.4E+02 MW-21 3 1 1/9/2022 pCi/L < 6.5E+02 MW-180 1 1 /9/2022 pCi/L < 6.3E+02 MW-2 1 9 1 1/9/2022 pCi/L < 6.0E+02 MW- 1 82 1 1/9/2022 pCi/L < 5.6E+02 MW-225 1 1/9/2022 pCi/L < 5.9E+02 MW-185 1 1 /9/2022 pCi/L < 6.2E+02 MW-225 1 1/9/2022 pCi/L < 6.2E+02

RBG-48220 l Rev. 2022 J Page 70 of 70 Annual Radioactive Effluent Release Report Page 27 of 27 Groundwater Monitoring Well Sampling Results Table 19, Tritium Analysis Results Station ID Start Date Units H-3 Station ID Start Date Units H-3 MW-231 1 1 /9/2022 pCi/L < 6.0E+02 MW-169 1 1/1 0/2022 pCi/L < 6.4E+02 MW-233 1 1 /9/2022 pCi/L < 6.1 E+02 MW-1 72 1 1/1 0/2022 pCi/L < 6.2E+02 MW-235 1 1 /9/2022 pCi/L < 5.9E+02 MW-188 1 1 /10/2022 pCi/L < 6.0E+02 PZ-03 1 1 /9/2022 pCi/L < 6.4E+02 MW-207 1 1/1 0/2022 pCi/L < 5.6E+02 T-1 4 1 1 /9/2022 pCi/L < 6.6E+02 MW-21 5 1 1/10/2022 pCi/L < 6.1 E+02 MW-106 1 1 /1 0/2022 pCi/L < 6.0E+02 MW-21 7 1 1/1 0/2022 pCi/L < 6.2E+02 MW-107 1 1 /1 0/2022 pCi/L < 5.6E+02 MW-227 1 1/1 0/2022 pCi/L < 6.7E+02 MW-1 08 1 1 /1 0/2022 pCi/L < 6.2E+02 MW-229 1 1/1 0/2022 pCi/L < 6.2E+02 MW-1 32 1 1/1 0/2022 pCi/L < 6.3E+02 SW-103 1 1/10/2022 pCi/L < 6.2E+02 MW-134 1 1 /1 0/2022 pCi/L < 5.8E+02 SW-104 1 1/10/2022 pCi/L < 6.1 E+02