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Annual Radioactive Effluent Release Report - 2021
	ML22123A177
Person / Time
Site:	Clinton
Issue date:	04/29/2022
From:	Jones G; Exelon Generation Co
To:	; Office of Nuclear Reactor Regulation
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ML22123A204	List: ML22123A177; ML22123A191;
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,.,, Exelon Generation.

January 01, 2021- December 31, 2021 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT CLINTON POWER STATION - DOCKET NUMBER 50-461 Prepared by :

Greg Jones Clinton Power Station Page 1 of 108

TABLE OF CONTENTS SECTION# TITLE PAGE 1 Executive Summary 6 2 Introduction 7 3 Supplemental Information 13 4 Radioactive Effluent Data 17 5 Solid Waste Disposal Information 28 6 Dose Measurements and Assessments 31 7 Meteorological Data and Dispersion Estimates 43 8 ODCM Operational Remedial Requirement Report 102 9 Changes to Radioactive Waste Treatment Systems 103 10 New Locations for Dose Calculation and/or Environmental Monitoring 104 11 Corrections to Data Reported in Previous Reports 105 12 Changes to the Offsite Dose Calculation Manual 108 Page 2 of 108

LIST OF TABLES TABLE# TITLE PAGE Gaseous Effluents - Summation of All Releases 17 1

1A Air Doses Due to Gaseous Releases 18

1B Doses to a Member of the Public Due to Radioiodines, Tritium, 18 Carbon-14, and Particulates in Gaseous Releases 2 Gaseous Effluents - Nuclides Released 19 3 Radioactive Gaseous Waste LLD Values 20 4 Waterborne Effluents - Summation of All Releases 22 5 Waterborne Effluents - Nuclides Released 23 6 Radioactive Liquid Waste LLD Values 24 7 Solid Waste and Irradiated Fuel Shipments 29 Maximum Offsite Doses and Dose Commitments to Members of the Public 8 32 in Each Sector Calculated Doses to Members of the Public During Use of the Department 9 of Natural Resources Recreation Area in the East-Southeast Sector within 36 the CPS Site Boundary Calculated Doses to Members of the Public During Use of the Road in the 10 37 Southeast Sector within the CPS Site Boundary Calculated Doses for the Residents in the South-Southeast Sector within 11 38 the CPS Site Boundary Calculated Doses for the Residents in the Southwest Sector within the CPS 12 39 Site Boundary Calculated Doses to Members of the Public During Use of the Agricultural 13 40 Acreage in the South-Southwest Sector within the CPS Site Boundary Calculated Doses for the Residents in the West-Southwest Sector within 14 41 the CPS Site Boundary Calculated Doses to Members of the Public During Use of Clinton Lake in 15 42 the Northwest Sector within the CPS Site Boundary 16 Meteorological Data Availability 44 17 Classification of Atmospheric Stability 45 18 Joint Wind Frequency Distribution by Stability Class 46 Page 3 of 108

19 Nearest Residence 104 20 Nearest Broadleaf Garden 105 21 Nearest Milking Animal 106 Page 4 of 108

LIST OF FIGURES FIGURE# TITLE PAGE 1 CPS Airborne Effluent Release Points 8 2 CPS Waterborne Effluents Release Pathway 9 3 Effluent Exposure Pathways 11 4 Areas Within the CPS Site Boundary Open to Members of the Public 35 Page 5 of 108

SECTION 1 EXECUTIVE

SUMMARY

The Annual Radioactive Effluent Release Report (ARERR) is a detailed description of gaseous and liquid radioactive effluents released from Clinton Power Station (CPS) and the resulting radiation doses for the period of January 01, 2021 through December 31, 2021. This report also includes a detailed meteorological section providing weather history of the surrounding area during this period. The information in the ARERR is used to calculate the offsite dose to our public.

The report also includes a summary of the amounts of radioactive material contained in solid waste that is packaged and shipped to a federally approved disposal/burial facility offsite.

Additionally, this report notifies the U.S. Nuclear Regulatory Commission (NRC) staff of changes to CPS's Offsite Dose Calculation Manual (ODCM), as well as exceptions to the CPS effluent monitoring program and a summary of events that must be reported in accordance with ODCM Section 6.2.

The NRC requires that nuclear power facilities be designed, constructed and operated in such a manner as to maintain radioactive effluent releases to unrestricted areas 8_s !:,ow 8_s

.B,easonably 8_chievable (ALARA). To ensure compliance with this criterion, the NRC has established limitations governing the release of radioactivity in effluents.

During 2021, CPS operations were well within these federally required limits. The maximum annual radiation dose delivered to the inhabitants of the area surrounding CPS, due to radioactivity released from the station, was 3.37E-02 mRem (millirem). The radiation dose to the public in the vicinity of CPS was calculated by using the concentration of radioactive nuclides from each gaseous effluent release coupled with historical weather conditions. The dose from CPS gaseous radioactive effluents is only a small fraction of the limit (2.25E-01%) for the maximum exposed member of the public. There were no liquid effluent releases in 2021.

As such, there was no dose received by the public from the liquid radioactive effluent pathway.

Page 6 of 108

SECTION 2 INTRODUCTION CPS is located in Harp Township, DeWitt County approximately six miles east of the city of Clinton in east-central Illinois. CPS is a ~1,140 megawatt gross electrical power output boiling water reactor. Initial fuel load commenced in September of 1986 with initial criticality of the reactor occurring on February 27, 1987. Commercial operation commenced in April 1987 and the reactor reached 100% power for the first time on September 15, 1987.

CPS releases airborne effluents via two gaseous effluent release points to the environment. They are the Common Station Heating, Ventilating, and Air Conditioning (HVAC)

Vent Stack and the Standby Gas Treatment System (SGTS) Vent as shown in Figure 1. Each gaseous effluent release point is continuously monitored consisting of a surveillance program of periodic sampling and analysis as specified in the ODCM.

CPS is licensed to release radioactive liquid effluents in a batch mode, however there were no radioactive liquid releases in 2021 at CPS. Each release would have been sampled and analyzed prior to release if this were to occur. Depending upon the amount of activity in a release, liquid effluents would vary from 10 to 300 gallons per minute (GPM). This volume is further combined with both Plant Service Water flow, which is a minimum of approximately 5,000 GPM, along with Plant Circulating Water flow, another Oto 567,000 GPM, in the seal well, just prior to entering the 3.4-mile discharge flume into Lake Clinton as depicted in Figure 2.

Processing and Monitoring CPS strictly controls effluents to ensure radioactivity released to the environment is maintained ALARA and does not exceed federal release limit criteria. Effluent controls include the operation of radiation monitoring systems within the plant as well as an offsite environmental analysis program. In-plant radiation monitoring systems are used to provide a continuous indication of radioactivity in effluent streams. Some are also used to collect particulate and radioiodine samples. Radioactive effluent related samples are analyzed in a controlled laboratory environment to identify the specific concentration of those radionuclides being released. Sampling and analysis provides a more sensitive and precise method of determining effluent composition to complement the information provided by real-time radiation monitoring instruments.

Beyond the plant itself, a Radiological Environmental Monitoring Program (REMP) is maintained in accordance with Federal Regulations. The purpose of the REMP program is to assess the radiological impact on the environment due to the operation of CPS. Implicit in this charter is the license requirement to trend and assess radiation exposure rates and radioactivity concentrations that may contribute to dose to the public. The program consists of two phases; pre-operational and operational. During the pre-operational phase of the program, the baseline for the local radiation environment was established. The operational phase of the program includes the objective of making confirmatory measurements to verify that the in-plant controls for the release of radioactive material are functioning as designed. Assessment of the operational impact of CPS on the environment is based on data collected since initial criticality of the reactor.

Page 7 of 108

FIGURE 1 CPS AIRBORNE EFFLUENT RELEASE POINTS TURBINE BULDING RADWASiE AND ROOF EL 875'0' MACHINE SHOP BUii.DiNG ROOF EL 781'0' COKTROL ROOM AIRHANOUHG UNIT&

CONTAINMENT BUILDING SQ11 Flll'ER UNITS (AT EL 719'0")

HVAC Exhaust Vent SGTS Exhaust Vent Release Point Height (feet) 200 200 Building Height (feet) 190 190 Release Point Geometry Duct Pipe Release Point Area (ft 2 ) 120 2 Release Point Diameter (feet) 12* 1 Annual Average Flow Rate (ft 3/sec) 3,945 67 Vertical Exit Velocity (feet/sec) 33 41

Effective 2(A/rc) 112 diameter Page 8 of108

FIGURE 2 CPS WATERBORNE EFFLUENTS RELEASE PATHWAY PLANT SERVICE WATER

RW8t,.OG..

(UP102S.OOO

. ~IBATcff) *. .

.. -.* ., :. . *f--';o-..,_____,-_,

l. (AT LEAST 5,000 GPMJ LIQUID

,, ... *- i ---_--* RAOWASTE

~ , -.. ., .* . ~ .

I

. .. DISCHARGE

. . . LINE

( to-GO OR 60-300 GPM>

(@. RAOIATION~ONlTOR Al.ARMJTRIP SETPOIUT CI.J.CUlREo BASED 00 EJ..at B).'t'Cff ISOrOPICm>JYSlS mo DWTIONMW t>-< ISOLATION VALVE lEflMIW.TES Ra.EA.$ ON HIGH R.A.OWION.

HIGH RELEASEFWN ~ OR 111N DILUTION Fl.OW RATE B 90MPOSITE SAMPLER

<XX.1.ECtS I.JlPROXIWSEU' 20 ml EVERY GO MINUTES FROM nE [)(Scw.RGE l

fWME FORMO!ffiitY AIW.YSIS SEALWELL P l..AN1' CIRCULATING ___..-...----...____ i..;._ _ _ _.,___ _ _ _ _ _. . , _ LAKE WATER CLINTON (0-567 .000 GPM) OlSCHARGE. FLUME 3.4 MILES Page 9 of 108

Exposure Pathways A radiological exposure pathway is the vehicle by which the public may become exposed to radioactivity released from nuclear facilities. The major pathways of concern are those that could cause the highest calculated radiation dose. These pathways are determined from the type and amount of radioactivity released, the environmental transport mechanism and how the plant environs are used (i.e., residence, gardens, etc.). The environmental transport mechanism includes the historical meteorological characteristics of the area that are defined by wind speed and wind direction. This information is used to evaluate how the radionuclides will be distributed within the surrounding area. The most important factor in evaluating the exposure pathway is the use of the environment by the public living around CPS. Factors such as location of homes in the area, use of cattle for milk and the growing of gardens for vegetable consumption are important considerations when evaluating exposure pathways. Figure 3 illustrates the effluent exposure pathways that were considered.

The radioactive gaseous effluent exposure pathways include direct radiation, deposition on plants and soil and inhalation by animals and humans. The radioactive liquid effluent exposure pathways include fish consumption and direct exposure from Clinton Lake.

Dose Assessment Whole body radiation involves the exposure of all organs in the human body to ionizing radiation. Most naturally occurring background radiation exposures consist of whole body exposure although specific organs can receive radiation exposure from distinct radionuclides.

These radionuclides enter the body through inhalation and ingestion and seek different organs depending on the nuclide. For example, radioactive iodine selectively concentrates in the thyroid, radioactive strontium in mineralized bone, and radioactive cesium collects in muscle and liver tissue.

The total dose to organs from a given radionuclide also depends on the amount of activity in the organ and the amount of time that the radionuclide remains in the body. Some radionuclides remain for very short periods of time due to their rapid radioactive decay and/or elimination rate from the body, while others may remain longer.

Radiation dose to the public in the area surrounding CPS is-calculated for each release using historical weather conditions coupled with the concentrations of radioactive material present. The dose is calculated for all sixteen geographical sectors surrounding CPS and includes the location of the nearest residents, vegetable gardens producing broad leaf vegetables and dairy animals in all sectors. The calculated dose also uses the scientific concept of a "maximum exposed individual" and "standard man," and the maximum use factors for the environment, such as how much milk an average person consumes and how much air a person breathes in a year.

Section 6 contains more detailed information on dose to the public.

Page 10 of 108

FIGURE 3 EFFLUENT EXPOSURE PATHWAYS

~

r DILUTED BY ATMOS ANIMALS (MILK, MEAl) .11111 tlll[

J j PLUME EXPOSURE AND INHALATION CLINTON POWE STATION CONSUMED BY PEOPLE

~

+ PEOPLE t

OONSUMED BY ANIMALS 1 '00NSUMED BY PEOPLE

~

CONSUMED BY PEOPI..E ASH

' /

Page 11 of 108

Gaseous Effluents Gaseous effluent radioactivity released from CPS is classified into two (2) categories.

The first category is noble gases. The second category consists of 1131 , 1133 , H3 , C14 and all radionuclides in particulatt;! form with radioactive half-lives greater than eight (8) days. Noble gases - such as xenon and krypton - are biologically and chemically non-reactive. As such, these radionuclides - specifically Kr 85 m, Xe 133 and Xe 135 - are the major contributors to external doses.

1131 , 1133 , H3 , C14 and radionuclides in particulate form with radioactive half-lives greater than eight (8) days are the major contributors to internal doses.

Liquid Effluents Liquid effluents may originate from two (2) sources at CPS. The first is effluent from the Radioactive Waste Treatment System. This water is demineralized prior to release, and samples are taken after the tank has been allowed to adequately recirculate. The second is from heat exchanger leaks found in closed cooling water systems that service radioactively contaminated systems. This second source would be considered an abnormal release if to occur. As a matter of station management commitment, CPS strives to be a zero (0) radioactive liquid release plant. The last radioactive liquid release occurred in September of 1992.

Solid Waste Shipments To reduce the radiation exposure to personnel and maintain the federally required ALARA concept, the NRC and the Department of Transportation (DOT) have established limits on the types of .radioactive waste and the amount of radioactivity that may be packaged and shipped offsite for burial or disposal. To ensure that CPS is complying with these regulations, the types of waste and the radioactivity present are reported to the NRC.

Page 12 of 108

SECTION 3 SUPPLEMENTAL INFORMATION I. REGULATORY LIMITS The NRC requires nuclear power facilities to be designed, constructed and operated in such a way that the radioactivity in effluent releases to unrestricted areas is kept ALARA. To ensure these criteria are met, each license authorizing nuclear reactor operation includes the Offsite Dose Calculation Manual governing the release of radioactive effluents. The ODCM designates the limits for release of effluents, as well as the limits for doses to the genera I public from the release of radioactive liquids and gases. These. limits are taken from Title 10 of the Code of Federal Regulations, Part 50, Appendix I (10CFR50 Appendix I), Title 10 of the Code of Federal Regulations, Part 20.1301 (10CFR20.1301) and Section 5.5.4 of Clinton Station's Technical Specifications. Maintaining effluent releases within these operating limitations demonstrates compliance with ALARA principles.

Specific limit information is given below.

A. Gaseous Effluents

1. The maximum permissible concentrations to limit doses for gaseous effluents shall not exceed the values provided within Section 5.5.4.g of Station's Technical Specifications. To ensure these concentrations are not exceeded, dose rates due to radioactive materials released in gaseous effluents from the site to areas at and beyond the site area boundary shall be limited to the following:

a. Noble gases Less than or equal to 500 mRem/year to the total body.

Less than or equal to 3,000 mRem/year to the skin.

b. 1131 , 1133 , H3, and all radionuclides in particulate form with radioactive half-lives greater than eight (8) days:

Less than or equal to 1,500 mRem/year to any organ.

2. In accordance with 10CFR50 Appendix I, air dose due to noble gases released in gaseous effluents to areas at and beyond the site boundary shall be limited to the following:

a. Less than or equal to 5 mRad for gamma radiation and less than or equal to 10 mRad for beta radiation during any calendar quarter.

b. Less than or equal to 10 mRad for gamma radiation and less than or equal to 20 mRad for beta radiation during any calendar year.

Page 13 of 108

3. In accordance with 10CFR50 Appendix I, dose to a member of the public (from 1131, 1133 , H3, and all radionuclides in particulate form with radioactive half-lives greater than eight (8) days) in gaseous effluents released to areas at and beyond the site boundary shall be limited to the following values:

a. Less than or equal to 7.5 mRem to any organ, during any calendar quarter.

b. Less than or equal to 15 mRem to any organ, during any calendar year.

B. Liquid Effluents

1. The concentration of radioactive material released in liquid effluents to unrestricted areas shall be limited to the values provided within Section 5.5.4.b of Station's Technical Specifications for radionuclides other than dissolved or entrained noble gases. For dissolved or entrained noble gases, the concentration shall be limited to 2.00E-04 µCi/ml total activity.

2. The dose or dose commitment to a member of the public from radioactive materials in liquid effluents released to unrestricted areas shall be limited to:

a. Less than or equal to 1.5 mRem to the total body and less than or equal to 5 mRem to any organ during any calendar quarter.

b. Less than or equal to 3 mRem to the total body and less than or equal to 10 mRem to any organ during any calendar year.

The above gaseous and liquid effluent limits are just a fraction of the dose limits established by the Environmental Protection Agency (EPA) found within Environmental Dose Standard Title 40, Code of Federal Regulations, Part 190 (40CFR190). The EPA has established dose limits for members of the public in the vicinity of a nuclear power plant. These dose limits are:

Less than or equal to 25 mRem per year to the total body.

Less than or equal to 75 mRem per year to the thyroid.

Less than or equal to 25 mRem per year to any other organ.

II. AVERAGE ENERGY The CPS ODCM limits the dose equivalent rates due to the release of fission and activation gases to less than or equal to 500 mRem per year to the total body and less than or equal to 3,000 mRem per year to the skin. These limits are based on dose calculations using actual isotopic concentrations from our effluent release streams and not based upon the gross count rate from our monitoring systems. Therefore, the average beta and gamma energies for gaseous effluents as described in Regulatory Guide 1.21, "Measuring, Evaluating, and Reporting Radioactivity in Solid Wastes and Releases of Radioactive Materials in Liquid and Gaseous Effluents from Light-Water-Cooled Nuclear Power Plants," are not applicable.

Page 14 of 108

Ill. MEASUREMENT AND APPROXIMATIONS OF TOTAL RADIOACTIVITY A. Fission and Activation Gases

1. Gas samples are collected weekly and are counted on a high purity germanium detector (HPGe} for principal gamma emitters. The HVAC and SGTS release points are continuously monitored and the average release flow rates for each release point are used to calculate the total activity released during a given time period.

2. Tritium is also collected by passing a known volume of the sample stream through a gas washer containing a known quantity of demineralized water. The collected samples are distilled and analyzed by liquid scintillation. The tritium released was calculated for each release point from the measured tritium concentration, the volume of the sample, the tritium collection efficiency, and the respective stack exhaust flow rates.

3. Carbon-14 release values were estimated using the methodology included in the EPRI Technical Report 1021106, using the 2021 Clinton Power Station specific parameters of normalized Carbon-14 production rate of 5.049 Ci/GWt-yr, a gaseous release fraction of 0.99, a Carbon-14 carbon dioxide fraction of 0.95, a reactor power rating of 3473 MWt, and equivalent full power operation of 359.5 days.

B. Iodines Iodine is continuously collected on a silver zeolite cartridge filter via an isokinetic sampling assembly from each release point. Filters are normally exchanged once per week and then analyzed on an HPGe system. The flow rates for each release point are averaged over the duration of the sampling period and these results - along with specific isotopic concentrations -

are then used to determine the total activity released during the time period in question.

C.. Particulates Particulates are continuously collected on a filter paper via an isokinetic sampling assembly on each release point. Filters are normally exchanged once- per week and then analyzed on an HPGe system. The flow rates for each release point are averaged over the duration of the sampling period and these results - along with specific isotopic concentrations -

are then used to determine the total activity released during the time period in question.

D. Liquid Effluents Each tank of liquid radwaste is recirculated for at least two (2) tank volumes, sampled and analyzed for principal gamma emitters prior to release. Each sample tank is recirculated for a sufficient amount of time prior to sampling ensuring that a representative sample is obtained.

Samples are then analyzed on an HPGe system and liquid release permits are generated based upon the values obtained from the isotopic analysis and the most recent values for H3, gross Page 15 of 108

alpha, Fess, Sr 89 and Sr 90 . An aliquot based on release volume is saved and added to composite containers. The concentrations of composited isotopes and the volumes of the releases associated with these composites establish the proportional relationships that are then utilized for calculating the total activity released for these isotopes. However, there has not been a radioactive liquid release since September of 1992.

IV. DESCRIPTION OF ERROR ESTIMATES Estimates of measurement and analytical error for gaseous and liquid effluents are calculated as follows:

where: Er= total percent error E1 ... EN = percent error due to calibration standards, laboratory analysis, instruments, sample flow, etc.

Page 16 of 108

SECTION 4 RADIOACTIVE EFFLUENT DATA TABLE 1 Gaseous Effluents - Summation Of All Releases Data Period : January 01, 2021 - December 31, 2021 Co nt inuous M ixed Mode Units Quarter 1 Quarter 2 Quarter 3 Quarter 4 Est. Total Error,%

A. Fission & Activation Gases

1. Total Release Ci 2.84E+00 2.21E+00 5.34E+00 2.68E+00 3.00E+0l

2. Average release rate

µCi/sec for period 3.65E-01 2.82E -01 6.79E-01 3.37E-01

3. Percent of ODCM Limit * *

B. Iodines

1. Total lodine - 131 Ci 0 .00E+00 0.00E+00 0 .00E+00 0 .00E+00 3.l0E+0l

2. Average release rate

µC i/sec for period 0 .00E+00 0 .00E+00 0 .0E+00 0.0E+00

3. Percent of ODCM Limit * * *

C. Particulates

1. Particulates with Ci 2.40E+0l half- lives >8 days 5.53E-06 2.32E-06 l.45E-05 9 .03E-05

2. Average release rate

µCi/sec for per iod 7.llE-07 2.95E-07 l.85E-06 l.14E-05

3. Percent of ODCM Limit * *

D. Tritium

1. Total Release Ci 7.42E+00 7.56E+00 6.28E+00 5.82E+00 2 .l0E+0l

2. Average release rate

µCi/sec for period 9.54E-01 9.62E-01 7 .99E-01 7.32E-01

3. Percent of ODCM Limit * * *

E. Gross Alpha

1. Total Release Ci <LLD <LLD <LLD <LLD

2. Average release rate

µCi/sec 0 .00E+00 0 .00E+00 0 .00E+00 0 .00E+00 for period F. Carbon-14

1. Total Release Ci 4 .llE+00 4 .31E+00 4.10E+00 2 .89E+00

2. Average release

µ Ci/sec 5 .28E -01 5 .48E -01 5 .22E-01 3.57E -01 Rate for period

Applicable limits are expressed in terms of dose . See Tables lA and 1B of this report .

Page 17 of 108

TABLE lA Air Doses Due to Gaseous Releases Doses per Quarter (mRad)

Type of ODCM znd 3rd 1st Quarter % of Limit % of Limit % of Limit 4 th Quarter % of Limit Radiation Limit Quarter Quarter 5

Gamma l .31E-04 2.62E-03 1.02E-04 2.04E-03 1.76E-04 3.52E-03 1.17E-04 2.34E-03 mRad 10 Beta 4.63E-05 4.63E-04 3.61E-05 3.61E-04 7 .58E-05 7 .58E -04 4.13E-05 4 .13E-04 mRad Doses per Year (mRad)

Type of Radiation ODCM Limit Year % of Limit Gamma 10 mRad 2.93E-04 2.93E-03 Beta 20 mRad 1.17E-04 5.85E-04 TABLE lB Doses to a Member of the Public Due to Radioiodines, Tritium, Carbon-14, and Particulates in Gaseous Release Doses per Quarter (mRem)

ODCM 111 %of znd %of 3rd % of 4th % of Organ Limit Quarter Limit Quarter Limit Quarter Limit Quarter Limit Bone 7.5 mRem 8.33E-03 1.llE-01 8.71E-03 1.16E-01 8.30E-03 1.llE-01 5.68E-03 7.57E-02 Liver 7.5 mRem 1.22E-04 1.63E-03 l.78E-04 2.37E-03 l.59E-04 2.12E-03 1.SlE-04 2.0lE-03 TBody 7.5 mRem 1.79E-03 2.39E-02 l.97E-03 2.63E-02 1.82E-03 2.43E-02 1.33E-03 1.77E-02 Thyroid 7.5 mRem l.22E-04 l.63E-03 l.78E-04 2.37E-03 1.58E-04 2.llE-03 1.47E-04 l.96E-03 Kidney 7.5 mRem 1.22E-04 l.63E-03 l.78E-04 2.37E-03 1.58E-04 2.llE-03 l.48E-04 l.97E-03 Lung 7.5 mRem 1.22E-04 l.63E-03 l.78E-04 2.37E-03 l.58E-04 2.llE-03 l.47E-04 l.96E-03 GILLI 7.5 mRem l.22E-04 l.63E-03 l.78E-04 2.37E-03 l.59E-04 2.12E-03 1.SlE-04 2.0lE-03 Doses per Year (mRem)

Type of Organ ODCM Limit Dose % of Limit Bone 15 mRem 3.llE-02 2.07E-01 Liver 15 mRem 6.llE-04 4.07E-03 TBody 15 mRem 6.92E-03 4.61E-02 Thyroid 15 mRem 6.05E-04 4.03E-03 Kidney 15 mRem 6.07E-04 4.05E-03 Lung 15 mRem 6.06E-04 4.04E-03 GILLI 15 mRem 6.lOE-04 4.07E-03 Page 18 of 108

TABLE 2 Gaseous Effluents - Nuclides Released Clinton Power Station YEAR : 2021 Mixed Mode Release X Elevated Release I Continuous Mode X Ground-Level Release Batch Mode _

Units Quarter 11 11 Quarter 2111 Quarter 31 11 Quarter 4 111 A. Fission Gases Xe Bs Ci <LLD <LLD l.66E+00 <LLD Kr8Sm Ci <LLD <LLD <LLD <LLD Xe13 3 Ci <LLD <LLD <LLD <LLD Krss Ci <LLD <LLD <LLD <LLD Ar41 Ci 2.84E+00 2.21E+00 3.68E+00 2 .68E+00 Total for Period Ci 2.84E+00 2.21E+00 5.34E+00 2.68E+00 B. Iodines 1131 Ci <LLD <LLD <LLD <LLD 1133 Ci <LLD <LLD <LLD <LLD Total for Period Ci <LLD <LLD <LLD <LLD C. Particulates Co6o Ci 5 .53E-06 2.32E-06 <LLD <LLD y 91m [2] Ci <LLD <LLD <LLD <LLD Nbgs Ci <LLD <LLD <LLD <LLD ce141 Ci <LLD <LLD <LLD <LLD crs1 Ci <LLD <LLD <LLD <LLD Mn s4 Ci <LLD <LLD l.45E-05 9 .03E-05 Na 24 [2l Ci <LLD <LLD <LLD <LLD Cd 109 Ci <LLD <LLD <LLD <LLD CsBs [21 Ci <LLD <LLD <LLD <LLD Coss Ci <LLD <LLD <LLD <LLD zn65 Ci <LLD <LLD <LLD <LLD Total for Period Ci 5.53E-06 6 .61E-05 l.45E-05 9.03E-05 D. Gross Alpha Gross Alpha Ci <LLD <LLD <LLD <LLD E. Tritium Total for Period Ci 7.42E+00 7.56E+00 6.28E+00 5 .82E+00 F. Carbon-14 Total for Period Ci 4.llE+00 4.31E+00 4.l0E+00 2.84E+00 111 The lower the value of the actual sample activity - w it h respect to background activity -

the greater the counting error . Proportionally, large errors are r eported for the various components of CPS gaseous effluents because of their consistent low sample activity.

[ll Half-life is less than 8 days, therefore not included in Table 1 Summation .

Page 19 of 108

TABLE 3 Radioactive Gaseous Waste LLD Values Lower Limit of Detection*

TYPE OF ACTIVITY ANALYSIS

(µCi/cc)

Principal Gamma Emitters, sl.00E-04

[Noble Gases] b,c H3C s l.00E-06 1131 d sl. 00E-12 1133 d s l.00E-10 Principal Gamma Emitters, sl.00E-11

[Particulates] b, e srs9, Sr9o g s l.00E-11 Gross Alpha 1 sl.00E-11 Table 3 Notations :

a The Lower Limit of Detection (LLD) as defined for purposes of these specifications, as an "a priori " determinat ion of the smallest concentration of rad ioactive material in a sample that will yield a net count - above system background - that will be detected with a 95% probability and with a low (5%) probability of incorrectly concluding that a blank observation represents a "real " signal.

For a particular measurement system, which may include radiochemical separation:

LLD = 4.66. Sb E

V

2 .22 x 106

Y

e - M r Where:

LLD is the "a priori" lower limit of detection as defined above, as µCi per unit mass or volume, Sb is the standard deviation of the background counting rate or of the counting rate of a blank sample as appropriate, in counts per minute (cpm),

Page 20 of 108

Table 3 Notations (continued):

Eis the counting efficiency, in counts per disintegration, Vis the sample size in units of mass or volume, 2.22E+06 is the number of disintegrations per minute (dpm) per microcurie, Y is the fractional radiochemical yield, when applicable, 11, is the radioactive decay constant for the particular radionuclide (sec- 1 ) and flt for plant effluents is the elapsed time between the midpoint of sample collection and the time of counting (sec) .

Typical values of E, V, Y, and flt should be used in the calculation.

The LLD is defined as an a priori (before the fact) limit representing the capability of a measurement system and not as an a posteriori (after the fact) limit for a particular measurement .

b The principal gamma emitters for which the LLD specification applies include the following radionuclides: Kr 87 , Kr 88 , Xe 133 , Xe 133 m, Xe 135 , and Xe 138 in noble gas releases and Mn 54 , Fe 59 , Co 58 , Co 60 , Zn 65 , Mo 99 , 1131 , Cs 13 4, Cs 13 7, Ce 141 , and Ce 144 in iodine and particulate releases . This list does not mean that only these nuclides are to be considered . Other gamma peaks that are identifiable - together with those of the above nuclides - shall also be analyzed and reported in the Radioactive Effluent Release Report.

c Weekly grab sample and analysis d Continuous charcoal sample analyzed weekly e Continuous particulate sample analyzed weekly f Composite particulate sample analyzed monthly g Composite particulate sample analyzed quarterly Page 21 of 108

TABLE 4 Waterborne Effluents - Summation Of All Releases Data Period : January 01, 2021 - December 31, 2021 There were zero (O) liquid radwaste releases from CPS in 2021.

Est.

Quarter Quarter Quarter Quarter Total Units 1 2 3 4 Error,%

A. Fission & Activation Productsl 1l

1. Total Release Ci 0 .00E+00 0 .00E +0 0 0 .00E+00 0.00E+00 N/A Average diluted

2. concentration µCi/ml 0 .00E+00 0 .00E+00 0 .00E+00 0 .00E+00 during period Percent of ODCM

3. % N/A N/A N/A N/A Limit B. Tritiuml 1l 1 . Total Release Ci 0 .00E+00 0 .00E+00 0 .00E+00 0.00E+00 N/A Average diluted

2. concentration µ Ci/ml 0.00E+00 0 .00E+00 0 .00E+00 0.00E+00 during period Percent of ODCM

3. % N/A N/A N/A N/A Limit C. Dissolved and Entrained Gasesl 1 l

1. Total Release Ci 0.00E+00 0.00E+00 0 .00E+00 0.00E+00 N/A Average diluted

2. concentration µCi/ml 0 .00E+00 0.00E +0 0 0 .00E +00 0.00E +00 during period Percent of ODCM

3. % N/A N/A N/A N/A Limit D. Gross Alpha Radioactivityl 1 J Gross alpha radioactivity Ci 0 .00E+00 0.00E +0 0 0 .00E+00 0.00E +00 N/A E. Volume of Waste Released (prior to Dilution)

Volume of Waste Released (prior to Liters 0.00E+00 0 .00E+00 0.00E+00 0 .00E+00 N/A Dilution)

F. Volume of dilution water used during period Volume of dilution water Liters 0.00E+00 0.00E+00 0 .00E+00 0.00E+00 N/A used during period 111 A value corresponding to ten times the values found in 10CFR20 Appendix B, Table 2, Column 2 is used for all Effluent Concentration Limit (ECL) calculations . For dissolved and entrained noble gases, the concentration is limited to 2.00E-04 µCi/ml total activity.

Page 22 of 108

TABLE 5 Waterborne Effluents - Nuclides Released Clinton Power Station YEAR : 2021 There were zero (0) liquid radwaste releases from CPS in 2021.

I Continuous Mode Batch Mode Units Quarter 1 Quarter 2 Quarter 3 Quarter 4 A. Tritium Total for Period Ci O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO B. Fission and Activation Products Mns4 Ci O.OOE+OO O.OOE+OO 0 .00E+OO O.OOE+OO Coss Ci 0 .00E+OO O.OOE+OO O.OOE+OO O.OOE+OO Fess Ci O.OOE+OO O.OOE+OO 0.00E+OO O.OOE+OO Fes9 Ci O.OOE+OO O.OOE+OO 0 .00E+OO O.OOE+OO Coss Ci O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Co6o Ci O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO zn6S Ci O.OOE+OO 0.00E+OO O.OOE+OO O.OOE+OO Srs9 Ci O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Sr9o Ci O.OOE+OO O.OOE+OO 0 .00E+OO O.OOE+OO Nb9s Ci O.OOE+OO O.OOE+OO O.OOE+OO 0 .00E+OO zr9S Ci O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Mo99 Ci O.OOE+OO O.OOE+OO 0 .00E+OO O.OOE+OO 1131 Ci O.OOE+OO 0.00E+OO O.OOE+OO O.OOE+OO CsB4 Ci O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Cs131 Ci O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Ba140 Ci O.OOE+OO O.OOE+OO 0 .00E+OO 0.00E+OO La140 Ci O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO ce141 Ci O.OOE+OO O.OOE+OO 0 .00E+OO O.OOE+OO ce144 Ci O.OOE+OO 0.00E+OO O.OOE+OO O.OOE+OO Total for Period Ci 0.00E+OO 0.00E+OO O.OOE+OO O.OOE+OO C. Dissolved and Entrained Noble Gases Krssm Ci O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Krs1 Ci O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Kras Ci O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Xe133 Ci O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO XeBs Ci O.OOE+OO 0.00E+OO O.OOE+OO O.OOE+OO XeBs Ci O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Total for Period Ci O.OOE+OO 0.00E+OO 0 .00E+OO 0 .00E+OO Page 23 of 108

TABLE 6 Radioactive Liquid Waste LLD Values TYPE OF ACTIVITY ANALYSIS Lower Limit of Detection (LLD) a

(µCi/ml)

Principal Gamma Emitters b ~5.00E -07 113 1 ~ 1.00 E- 06 Dissolved and Entra ined Gases

~ 1.00E-05 (Gamma Em itters) c H3 ~ 1.00E-05 Gross Alpha ~ 1.00E-07 Sr 89 , Sr 90 ~ 5 .00E-08 Fess ~ 1.00E-06 Table 6 Notations :

a The Lower Limit of Detection (LLD) as defined for purposes of these specificat ions, as an " a priori " determination of the smallest concentration of radioactive material in a sample that will yield a net count - above system background - that will be detected with a 95% probability and with only a 5% probability of falsely concluding that a blank observation repre sents a " real " signal .

Fo r a particular measurement system , which may include radiochemical separation:

LLD = 4 .66. S b E

V

2.22 x 10 6

Y

e - M, Where :

LLD is the " a priori " lower limit of detection as defined above, as µCi per unit mass or volume ,

Sb is the standard deviation of the background counting rate or of the counting rate of a blank sample as appropriate, in counts per minute (cpm),

Eis the counting efficiency, as counts per disintegration ,

Vi s th e sa mple size in un its of ma ss o r vol ume, 2.22E +06 is the number of disin tegrations per minute (dpm) per microcurie, Page 24 of 108

Table 6 Notations (continued):

Y is the fractional radiochemical yield, when applicable,

'A is the radioactive decay constant for the particular radionuclide (sec-1) and lit for plant effluents is the elapsed time between the midpoint of sample collection and the time of counting (sec).

Typical values of E, V, Y, and 'At should be used in the calculation.

The LLD is defined as an a priori (before the fact) limit representing the capability of a measurement system and not as an a posteriori (after the fact, MDA) limit for a particular measurement.

b The principal gamma emitters for which the LLD requirement applies include the following radionuclides: Mn 54 , Fe 59 , Co 58 , Co 60 , Zn 65 , Mo 99 , Cs 134 , Cs 137 , and Ce 141 . Ce 144 shall also be measured, but with an LLD of 5.0E-06. This list does not mean that only these nuclides are detected and reported. Other gamma peaks that are measurable -

together with those of the above nuclides - shall also be analyzed and reported in the Radioactive Effluent Release Report.

c Dissolved and entrained gases are: Xe 1 33 , Xe 135 , Xe 138, Kr 85 m, Kr 87 and Kr 88 .

Page 25 of 108

BATCH RELEASES There were zero (0) liquid radwaste releases from CPS in 2021.

A. Batch Liquid Releases: 2021

1. Number of batch releases: 0

2. Total time period for batch releases: N/A

3. Maximum time period for batch release: N/A

4. Average time period for batch release: N/A

5. Minimum time period for batch release: N/A

6. Average stream flow during periods of release: N/A

7. Total waste volume: N/A

8. Total dilution volume: N/A B. Batch Gaseous Releases: 2021

1. Number of batch releases: 0

2. Total time period for batch releases: N/A

3. Maximum time period for batch release: N/A

4. Average time period for batch release N/A

5. Minimum time period for ba*tch release: N/A Page 26 of 108

ABNORMAL RELEASES Information concerning abnormal radioactive liquid and gaseous releases is presented below for the year 2021. There were no abnormal or unplanned liquid or gaseous releases from CPS in 2021.

Liquid Releases:

Number of Abnormal Liquid Releases: Zero (0)

Activity Released [Ci]: Zero (0)

Gaseous Releases:

Number of Abnormal Gaseous Releases: Zero (0)

Activity Released [Ci]: Zero (0)

Page 27 of 108

SECTION 5 SOLID WASTE DISPOSAL INFORMATION During this reporting period -January 01, 2021 through December 31, 2021 - there were fifteen (15) radioactive waste shipments and zero (0) irradiated fuel shipments from CPS. In addition, the CPS ODCM requires reporting of the following information for solid waste shipped offsite during the above reporting period:

1. Container volume:

Class A Waste: 1.39E+04ft 3 / Class B Waste: 0.00E+00 ft 3 / Class C Waste: 0.00E+00 ft 3 This total includes Dry Active Waste (DAW), resins, filter sludges, evaporator bottoms, and other low level waste such as mixed waste.

2. Total curie quantity: Class A Waste was 1.46E+02 curies and Class B Waste was 0.00E+00 curies and Class C Waste was 0.00E+00 curies in 2021 (determined by dose-to-curie and sample concentration methodology estimates).

3. Principal radionuclides: See Table 7-A.2 for listing of measured radionuclides.

4. Source of waste and processing employed: Non-compacted dry active waste, resins, filter sludges and evaporator bottoms dewatered.

5. Type of container: General Design and Type B Containers.

6. Solidification agent or absorbent: None.

Page 28 of 108

TABLE 7 Solid Waste and Irradiated Fuel Shipments A.1 Estimate of Solid Waste Shipped Offsite for Burial or Disposal: [NOT irradiated fuel]

January - December Est. Total Error, A.1 Type of Waste Units 2021 %

ft 3 2.42E+03 Spent resins, filter sludges,

a. 2.S0E+0l evaporator bottoms, etc.

Ci 1.46E+02 ft 3 1.1SE+04 Dry compactable waste,

b. 2.S0E+0l contaminated equipment, etc.

Ci 2.44E-01 ft 3 0 .00E+00 Irradiated components,

c. 2.S0E+0l control rods, etc. (not fuel)

Ci 0 .00E+00 ft 3 0 .00E+00

d. Other Wastes-Mixed 2.S0E+0l Ci 0.00E+00

Total curie quantity and principal radionuclides were determined by measurements.

A.2 Estimate of Major Nuclide Composition (by type of waste) :

1. Spent resins, filters, evaporator bottoms, etc.

Waste Class Nuclide Name % Percent Abundance Curies A Mn -54 7.25% l.06E+0l Fe-55 68.86% l.00E+02 Co-60 20.87% 3.04E+0l Zn-65 1.11% l.62E+00 Ni -63 1.42% 2.07E+00

2. Dry compactable waste, contaminated equipment, etc .

Waste Class Nuclide Name % Percent Abundance Curies A Mn-54 32.49% 7.94E-02 Fe-55 36.00% 8.80-E-02 Co-60 24.30% 5.94E-02 Ni-63 3.32% 8.llE-03 Zn-65 1.77% 4.31E-03 Page 29 of 108

TABLE 7 (continued)

Solid Waste and Irradiated Fuel Shipments 3 . Irradiated Components Waste Class Nuclide Name % Percent Abundance Curies C N/A N/A N/A 4 . Mixed Waste Waste Class Nuclide Name % Percent Abundance Curies A N/A N/A N/A A .3 Solid Waste Disposition:

January - December 2021 Number of Shipments Mode of Transportation Destination 6 Hittman Transport Energy Solutions - Bear Creek 1560 Bear Creek Road 1 Hittman Transport EnergySolutions LLC .

Clive Disposal Site - Containerized Waste Facility 8 Hittman Transport EnergySolutions LLC .

Clive Disposal Site - Treatment Facility B. Irradiated Fuel Shipments Disposition :

January - December 2021 Number of Shipments Mode of Transportation Destination 0 N/A N/A Page 30 of 108

SECTION 6 DOSE MEASUREMENTS AND ASSESSMENTS This section of the Annual Effluent Release Report provides the dose received by receptors around CPS from gaseous and liquid effluents . The dose to the receptor that would have received the highest dose in each sector (defined as the Critical Receptor for that sector) is listed within this report . This section also provides the dose to individuals who were inside the Site Boundary . This section also summarizes CPS's compliance with the requirements found within 40CFR190.

The 2021 maximum expected annual dose from Carbon-14 released from CPS has been calculated using the methodology included in the EPRI Technical Report 1021106 using the maximum gross thermal capacity maintained for 320 .2 days of equivalent full power operation .

The assumptions used in determining dose values are as follows :

All receptors within a five (5) mile radius are included in the Annual Land Use Census. This Annual Census determines what dose pathways are present as well as the distance of each receptor from the site .

The annual average meteorological data for 2021 was used in conjunction with the Annual Land Use Census to determine the dose to each receptor within five (5) miles .

The doses for each receptor from each sector were determined using methodologies given in the ODCM .

The activity used in these assessments is the total activity released by CPS for the year 2021 not including radionuclides with half-lives less than eight (8) days and when dose pathway factors were unavailable.

The occupancy factor was taken into consideration by calculating the dose to individuals using areas inside the Site Boundary in non-residential areas . The occupancy factor is determined by dividing the number of hour(s) of occupancy per year (taken from the ODCM) and dividing that value by the total number of hour(s) per year.

Dose to individuals using areas inside the Site Boundary (that are not residents) was calculated using the Ground Plane and Inhalation pathways.

Page 31 of 108

TABLE 8 Maximum Offsite Doses and Dose Commitments To Members of the Public in Each Sector Data Pe ri od : January 01 , 202 1 - December 31 , 202 1 This table illustrates the dose that a member from the public would most lik ely be ex posed to from rad ioactive effl uents in each sect or from CPS . These va lues represent the ma xi mum dose likely to expose a membe r of the publ ic in each sector.

AIRBORNE EFFLUENT DOSE WATERBORNE RECEPTOR INFORMATION EFFLUENT DOSE Iodines and Particulates Noble Gases (mRem) 111 (mRem) (mRad)

Distance Total Total Sector Pathways Organ Age Organ Skin Gamma Beta Organ (km) Body Body N 1.50 GP, I, M, V B A 3.13E-02 2.19E-05 1.43E-03 5.92E-04 4.06E-04 0 .00E+00 0 .00E+00 NNE 1.50 GP, I B A 1.54E-03 2.84E-05 4.94E -04 5.92E-04 2.94E-04 NE 2.07 GP, I, V B A 4.83E-03 9.31E -06 1.04E-03 2.S0E-04 1.24E-04 ENE 2.86 GP, I, V B A 3.04E-03 4.70E-06 7.46E -04 1.SBE-04 7.BlE-05 E 1.67 GP, I, V B A 4.40E-03 1.23E-05 9.54E -04 2.27E-04 1.13E-04 ESE 5.14 GP, I, V B A 3.37E-03 3.l0E-06 3.17E-04 1.73E-04 8.SBE-05 SE 3.90 GP, I B C 9.SBE-04 4.32E-06 2.35E-04 1.83E-04 6.45E-05 SSE 2.90 GP, I B A 4.94E-04 5.96E-06 1.56E-04 1.91E-04 9.46E-05 s 4 .78 GP, I, M B A 7.0lE-03 3.24E-06 1.46E-03 1.49E-04 2.36E-05 SSW 4 .68 GP, I B A 3.16E -04 2.16E-06 9.91E -05 1.23E-04 6.0BE-05 SW 1.17 GP, I B A 8.BBE-04 1.74E-05 2.BlE-04 3.28E-04 1.63E -04 WSW 3.62 GP, I, M, V B A 9.0lE-03 2.72E-06 1.94E-03 1.41E-04 6.99E-05 w 1.95 GP, I B T 4 .78E-04 3.SSE-06 1.47E-04 1.24E-04 6.lSE-05 WNW 2.63 GP, I B A 3.45E -04 2.SlE-06 1.0SE-04 1.34E-04 6.64E-05 NW 2.65 GP, I, V B A 2.93E-03 3.94E-06 7.17E-04 1.52E-04 7.52E-04 NNW 2.05 GP, I, M, V B A 1.63E-02 7.97E-06 3.49E-03 2.54E-04 1.26E-04 Key for Table 8 Pathways Organ Age GP = Ground Plane B =Bone A=Adult I= In halation T =Tee n M =Meat I= Infant V =Vegetation C =Child l 1 lTh ere w e re zero (0) liquid radwaste releases from CPS in 2021. All doses were within all regulatory limi t s, including lim it s from 40CFR190 .

Page 32 of 108

COMPLIANCE WITH 40CFR190 REQUIREMENTS Dosimeter of Legal Records (DLRs) are stationed around CPS to measure the ambient gamma radiation field. Monitoring stations are placed near the site boundary, which includes the Independent Spent Fuel Storage Installation (ISFSI) pad, and approximately five (5) miles from the reactor, in locations representing the sixteen (16) compass sectors. Other locations are chosen to measure the radiation field at places of special interest such as nearby residences, meeting places and population centers. Control sites are located further than ten (10) miles from the site, in areas that should not be affected by plant operations. The results from the field dosimeters are reported in the Annual Radiological Environmental Operating Report (AREOR) and indicated no excess dose to offsite areas. The organ and whole body doses reported in the above tables are determined using 10CFR50 Appendix I methodology, which encompasses the limits of 40CFR190. The requirement requires the preparation and submittal of a Special Report whenever the calculated doses from plant generated radioactive effluents and direct radiation exceed 25 mRem to the total body or any organ, except the thyroid, which shall be limited to less than or equal to 75 mRem. During 2021, Clinton Power Station operated at 1.40E-02% of the 40CFR190 total body limit, 1.25E-01% of the 40CFR190 organ limit and 8.07E-04% 40CFR190 thyroid limit.

INDENDENDENT SPENT FUEL STORAGE INSTALLATION {ISFSI}

No radioactive effluents were released from the Clinton Station ISFSI and no additional casks were placed on the pad for the period January 1, 2021 through December 31, 2021. Over the long term, as more storage modules containing dry shielded canisters of spent fuel are placed on the ISFSI pad, it is expected that ISFSI operations will become the prominent contributor to dose limits in this section. ISFSI dose contribution is in the form of direct radiation as no liquid or gas releases are expected to occur from the ISFSI canisters. The CPS 10CFR72.212 Report prepared in accordance with 10CFR72 requirements assumes a certain array of storage modules exists on the pad. The dose contribution from this array of casks combination with historical uranium fuel cycle operations prior to ISFSI operations was analyzed to be within 40CFR190 and 10CFR72.104 limits and is documented in Holtec Report No. Hl-2135750, Site Boundary Dose Rate Calculations for HI-STORM FW System for Clinton Power Station. The REMP Dosimeters recorded no net direct radiation dose to any Member of the Public from ISFSI.

DOSE TO MEMBERS OF THE PUBLIC WITHIN THE SITE BOUNDARY CPS Offsite Dose Calculation Manual section 6.2 requires that the Radioactive Effluent Release Report include an assessment of the radiation doses from radioactive liquids and gaseous effluents to MEMBERS OF THE PUBLIC due to their activities inside the SITE BOUNDARY.

Within the CPS site boundary there are seven areas that are open to members of the public as identified by CPS ODCM Table 5-3 (see Figure 4):

The Department of Natural Resources Recreation Area at 1.287 kilometers (0.8 miles) in the ESE sector A road at 0.495 kilometers (0.3 miles) in the SE sector A residence at 2.736 kilometers (1.7 miles) in the SSE sector A residence at 1.219 kilometers (0.8 miles) in the SW sector Page 33 of 108

Agricultural acreage at 1.372 kilometers (0.9 miles) in the SSW sector A residence at 2.414 kilometers (1.5 miles) in the WSW sector A portion of Clinton Lake at 0.335 kilometers (0.2 miles) in the NW sector At all of the above locations, the plume, inhalation and ground-plane exposure pathways are used for dose calculations. The 2021 Annual Land Use Census identified no other exposure pathways. All dose calculations were performed using the methodology contained in the CPS ODCM, with the exception of dose due to C-14, which was calculated using methodology included in the EPRI Technical Report 1021106.

Page 34 of 108

FIGURE 4 AREAS WITHIN THE CPS SITE BOUNDARY OPEN TO MEMBERS OF THE PUBLIC NOTES :

MAROA 1. Road 0.3 miles in SE Sector

2. Agricultural acreage 0 .9 miles in SSW Sector

3. Clinton Lake 0.2 miles in the NW Sector

4. Department of Natural Resources Recreation Area 0.8 miles in ESE Sector

5. Residence 0.8 miles in SW Sector

6. Residence 1.5 miles in WSW Sector

7. Residence 1.7 miles in SSE Sector WELDON TO aw4PAIGN Page 35 of 108

TABLE 9 Calculated Doses to Members of the Public During Use of the Department of Natural Resources Recreation Area in the East-Southeast Sector within the CPS Site Boundary Data Period : January 01, 2021- December 31, 2021 DESCRIPTION DOSE UNITS Total Body Dose Rate (Noble Gases) 9.27E -05 mRem/year Skin Dose Rate (Noble Gases) 1.38E -04 mRem/year Gamma Air Dose 8.40E-05 mRad Beta Air Dose 4.17E-05 mRad Total Body Dose[1 l 1.09E-04 mRem Skin Dose 5.06E-06 mRem

[ll Dose includes the dose values resulting from the release of iodines, particulates (with half lives >8 days), tritium, and C-14 in gaseous effluents.

Highest Organ Dose by Age Group:

Adult Bone 2.20E-04 mRem Teen Bone 3.12E-04 mRem Child Bone 4.29E-04 mRem Infant Bone NA( 2 J mRem

[ll Dose(s) are calculated only for the age groups likely to be in the field.

Page 36 of 108

TABLE 10 Calculated Doses to Members of the Public During Use of the Road in the Southeast Sector within the CPS Site Boundary Data Period : January 01, 2021 -December 31, 2021 DESCRIPTION DOSE UNITS Total Body Dose Rate (Noble Gases) 3 .22E-05 mRem/year Skin Dose Rate (Nob le Gases) 4 .77E -05 mRem/year Gamma Air Dose 3.24E-05 mRad Beta Air Dose l.61E-05 mRad Total Body Dose r1 1 4.29E-05 mRem Skin Dose l.95E-06 mRem riJ Dose includes the dose values resulting from the release of iodines, particulates (with half lives >8 days), tritium , and C-14 in gaseous effluents .

Highest Organ Dose by Age Group :

Adult Bone 8.36E-05 mRem Teen Bone l. 21E-04 mRem Child Bone 1.66E-04 mRem Infant Bone l .23 E-04 mRem Page 37 of 108

TABLE 11 Calculated Doses for the Residents in the South-Southeast Sector within the CPS Site Boundary Data Period : January 01, 2021- December 31, 2021 DESCRIPTION DOSE UNITS Total Body Dose Rate (Noble Gases) 1.46E-04 mRem/year Skin Dose Rate (Noble Gases) 2.16E-04 mRem/year Gamma Air Dose 1.95E-04 mRad Beta Air Dose 9.66E-05 mRad Total Body Dose l 1 J 2.24E -04 mRem Skin Dose 6.lOE-06 mRem 111 Dose includes the dose values resulting from the release of iodines, particulates (with half lives >8 days), tritium, and C-14 in gaseous effluents .

Highest Organ Dose by Age Group :

Adult Bone 9.88E-05 mRem Teen Bone 1.39E-04 mRem Child Bone 1.90E-04 mRem Infant Bone 1.SlE-04 mRem Page 38 of 108

TABLE 12 Calculated Doses for the Residents in the Southwest Sector within the CPS Site Boundary Data Period : January 01, 2021- December 31, 2021 DESCRIPTION DOSE UNITS Total Body Dose Rate (Noble Gases) 3 .73E -04 mRem/year Skin Dose Rate (Noble Gases) 5 .52E -04 mRem/year Gamma Air Dose 3.29E-04 mRad Beta Air Dose l.63E-04 mRad Total Body Dosel 1 J 4 .30E-04 mRem Skin Dose l .67E -05 mRem 111 Dose includes the dose values resulting from the release of iodines, particulates (with half lives >8 days), tritium, and C-14 in gaseous effluents .

Highest Organ Dose by Age Group :

Adult Bone l .72E-04 mRem Teen Bone 2.40E-04 mRem Child Bone 3.26E-04 mRem Infant Bone 2.60E-04 mRem Page 39 of 108

TABLE 13 Calculated Doses to Members of the Public During Use of the Agricultural Acreage in the South-Southwest Sector within the CPS Site Boundary Data Period: January 01, 2021- December 31, 2021 DESCRIPTION DOSE UNITS Total Body Dose Rate (Noble Gases) 2.72E-05 mRem/year Skin Dose Rate (Noble Gases) 4.04E-05 mRem/year Gamma Air Dose 2.13E-05 mRad Beta Air Dose l.06E-05 mRad Total Body Doser 1 1 2.79E-05 mRem Skin Dose l.0lE-06 mRem

[ll Dose includes the dose values resulting from the release of iodines, particulates (with half lives >8 days), tritium, and C-14 in gaseous effluents .

Highest Organ Dose by Age Group:

Adult Bone l .llE-05 mRem Teen Bone l.56E-05 mRem Child Bone NA[ 2 J mRem Infant Bone NA[ 2 l mRem r2 1 Dose(s) are calculated only for the age groups likely to be in the field Page 40 of 108

TABLE 14 Calculated Doses for the Residents in the West-Southwest Sector within the CPS Site Boundary Data Period: January 01, 2021- December 31, 2021 DESCRIPTION DOSE UNITS Total Body Dose Rate (Noble Gases) l.53E-04 mRem/year Skin Dose Rate (Noble Gases) 2.26E-04 mRem/year Gamma Air Dose 1 .52E-04 mRad Beta Air Dose 7 .52E -05 mRad Total Body Dosell) 1.96E-04 mRem Skin Dose 4 .36E-06 mRem 111 Dose includes the dose values resulting from the release of iodines, particulates (with half lives >8 days), tritium , and C-1 4 in gaseous effluents .

Highest Organ Dose by Age Group :

Adult Bone 7.66E -05 mRem Teen Bone l.08E-04 mRem Child Bone 1.48E-04 mRem Infant Bone 1.17E-04 mRem Page 41 of 108

TABLE 15 Calculated Doses to Members of the Public During Use of Clinton Lake in the Northwest Sector within the CPS Site Boundary Data Period: January 01, 2021- December 31, 2021 DESCRIPTION DOSE UNITS Total Body Dose Rate (Noble Gases) 2.26E-04 mRem/year Skin Dose Rate (Noble Gases) 3 .35E -04 mRem/year Gamma Air Dose 2.24E-04 mRad Beta Air Dose 1.16E-04 mRad Total Body Dose [1 1 3.03E-04 mRem Skin Dose 9.40E-06 mRem

[ll Dose includes the dose values resulting from the release of iodines, particulates (with half lives >8 days), tritium , and C-14 in gaseous effluents.

Highest Organ Dose by Age Group :

Adult Bone 6.08E -04 mRem Teen Bone 8.66E -04 mRem Child Bone 1.19E-03 mRem Infant Bone N/A[21 mRem (21 Dose(s) are calculated only for the age groups likely to be in the field Page 42 of 108

SECTION 7 METEOROLOGICAL DATA AND DISPERSION ESTIMATES On 13 April 1972, the meteorological monitoring program commenced at the Clinton Power Station site. The meteorological system consists of a tower 199 feet high with two (2) levels of instrumentation at the 10-meter and 60-meter elevations . A combined cup and vane sensor measures wind d irection and wind speed(s) at the 10-meter and 60-meter levels . An aspirated dual temperature sensor senses the temperatures at these levels . One-half of the dual sensors at each elevat ion are used for ambient temperature wh ile the other half are used to provide a differential temperature between the 10-meter and 60 -meter levels .

Meteorological monitoring instruments have been placed on the Clinton Power Station backup meteorological tower at the 10-meter level to serve as a backup to the primary meteorological tower .

Clinton Power Station meteorological data is transmitted to the Main Control Room (MCR) via a dedicated communication link . Once the signals are received at the MCR, they are then converted to a 4 to 20 milliamp signal and fed individually to a microprocessor and chart recorders. The microprocessor is part of the Clinton Power Station Radiation Mon itoring System (RMS) . Meteorological data is available via the microprocessors in the Main Control Room and the Technical Support Center (TSC) .

Dispersion modeling for effluents for normal operation of Clinton Power Station is a straight-line, sector-averaged Gaussian plume model designed to estimate average relative concentration at various receptor points . The model was developed in accordance with routine release analysis procedures specified in Regulatory Guide 1.111. For joint frequency input data ,

periods of calm are distributed in accordance with a directional distribution. For hourly input data, periods of calm are the previous hour's wind direction . Periods of calm are assigned a wind speed value of half the specified instrument threshold value . Reference Table 18 for more detailed informat ion on meteorology and dispersion data.

Page 43 of 108

TABLE 16 Meteorological Data Availability Data Period : January 01 , 2021 - December 31, 2021 PERCENT OF VALID PARAMETER HOURS PARAMETER Quarter 1 Quarter 2 Quarter 3 Quarter 4

1. Wind Speed

a. 10-Meter sensor 95.8 100.0 100.0 100.0

b. 60 Meter sensor 85.8 100.0 100.0 100.0

2. Wind Direction

a. 10-Meter sensor 99.9 100.0 100.0 100.0

b. 60 Meter sensor 99.9 100.0 100.0 100.0

3. Temperature

a. 10-Meter sensor 99.9 100.0 100.0 100.0

b. 60 Meter sensor 99.9 100.0 100.0 100.0

c. Temperature Difference {10m-60m) 99.9 100.0 100.0 100.0

4. Percent of hours for which valid 10-meter Wind Speed, Wind Direction, and Delta 95.8 100.0 100.0 100.0 Temperature were available

5. Percent of hours for which valid 60 -meter Wind Speed, Wind Direction, and Delta 85.8 100.0 100.0 100.0 Temperature were available Clinton Power Station was able to achieve 99 .4% Meteorological Recoverable Data during 2021 exceeding the min imum criteria of 90% as delineated within Regulatory Gu ide 1.23 .

Page 44 of 108

TABLE 17 Classification of Atmospheric Stability Stability Classification Pasquill Category Defining Conditions Extremely unstable A ------ <LH =s_ -1.9 Moderately unstable B -1.9 <LH =s_ -1. 7 Slightly unstable C -1.7 <LH=s_ -1.5 Neutral D -1.5 <LiT=s_ -0.5 Slightly stable E -0.5 <LiT~ 1.5 Moderately stable F 1.5 <LiT~ 4.0 Extremely stable G 4.0 <LiT~ ------

LiT = temperature difference in degrees Celsius per 100 meters Page 45 of 108

TABLE 18 Joint Wind Frequency Distribution by Stability Class Reporting Period: January 01, 2021- December 31, 2021 Clinton Power Station Period of Record: January - March 2021 Stability Class - Extremely Unstable - 60m-10m Delta-T (F)

Winds Measured at 10 Meters Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 3 1 0 0 4 NNE 0 0 0 0 0 0 0 NE 0 1 4 0 0 0 5 ENE 0 2 8 0 0 0 10 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 1 2 0 0 0 3 SSE 0 0 0 0 0 0 0 s 0 0 1 0 0 0 1 SSW 0 0 0 0 0 0 0 SW 0 0 0 0 0 0 0 WSW 0 0 0 0 0 0 0 w 0 0 0 0 0 0 0 WNW 0 0 0 4 3 0 7 NW 0 0 5 0 0 0 5 NNW 0 0 1 0 0 0 1 Variable 0 0 0 0 0 0 0 Total 0 4 24 5 3 0 36 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 Page 46 of 108

Clinton Power Station Period of Record: January - March 2021 Stability Class - Moderately Unstable - 60m-10m Delta-T (F)

Winds Measured at 10 Meters Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 1 1 3 0 0 5 NNE 0 0 1 0 0 0 1 NE 0 1 5 1 0 0 7 ENE 0 0 2 0 0 0 2 E 0 0 0 0 0 0 0 ESE 0 1 0 0 0 0 1 SE 0 6 4 0 0 0 10 SSE 0 1 3 0 0 0 4 s 0 0 9 5 0 0 14 SSW 0 0 2 0 1 0 3 SW 0 0 0 0 0 0 0 WSW 0 0 0 2 0 0 2 w 0 0 0 2 0 0 2 WNW 0 0 2 2 2 0 6 NW 0 3 7 4 2 1 17 NNW 0 0 6 0 0 0 6 Variable 0 0 0 0 0 0 0 Total 0 13 42 19 5 1 80 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 Page 47 of 108

Clinton Power Station Period of Record: January - March 2021 Stability Class - Slightly Unstable - 60m-10m Delta-T (F)

Winds Measured at 10 Meters Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 4 7 3 0 0 14 NNE 0 0 6 1 0 0 7 NE 0 3 5 2 0 0 10 ENE 0 0 3 0 0 0 3 E 0 0 0 0 0 0 0 ESE 0 5 0 0 0 0 5 SE 0 5 3 0 0 0 8 SSE 0 4 5 0 0 0 9 s 0 6 5 4 0 0 15 SSW 0 1 5 2 0 0 8 SW 0 0 0 2 0 0 2 WSW 0 1 3 2 0 0 6 w 0 0 2 2 0 0 4 WNW 0 3 7 2 1 0 13 NW 0 3 3 2 0 0 8 NNW 0 1 8 6 0 0 15 Variable 0 0 0 0 0 0 0 Total 0 36 62 28 1 0 127 Hours of calm in this stability class: 0 Hburs of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 Page 48 of 108

Clinton Power Station Period of Record: January - March 2021 Stability Class - Neutral - 60m-10m Delta-T (F)

Winds Measured at 10 Meters Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 8 26 79 28 0 0 141 NNE 2 17 43 5 5 3 75 NE 7 40 41 10 3 5 106 ENE 2 16 28 7 0 0 53 E 1 10 7 8 0 0 26 ESE 0 16 11 2 0 0 29 SE 1 14 40 7 0 0 62 SSE 2 10 32 12 0 0 56 s 0 11 17 16 0 0 44 SSW 2 7 30 8 7 2 56 SW 0 7 18 12 0 0 37 WSW 0 11 23 13 0 0 47 w 0 10 48 21 5 3 87 WNW 3 21 32 21 5 1 83 NW 5 25 49 21 2 0 102 NNW 8 25 62 20 0 0 115 Variable 0 0 0 0 0 0 0 Total 41 266 560 211 27 14 1119 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 53 Hours of missing stability measurements in all stability classes: 3 Page 49 of 108

Clinton Power Station Period of Record: January - March 2021 Stability Class - Slightly Stable - 60m-10m Delta-T (F)

Winds Measured at 10 Meters Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 2 15 1 0 0 0 18 NNE 1 15 2 4 0 0 22 NE 3 13 10 4 5 0 35 ENE 2 19 4 0 0 0 25 E 1 19 5 0 0 0 25 ESE 5 36 4 0 0 0 45 SE 0 21 9 0 0 0 30 SSE 0 23 12 6 0 0 41 s 1 16 52 13 0 0 82 SSW 1 13 39 9 7 0 69 SW 2 5 15 3 0 0 25 WSW 1 6 10 2 0 0 19 w 1 8 13 4 0 0 26 WNW 4 15 13 1 0 0 33 NW 5 23 18 2 0 0 48 NNW 6 6 12 0 0 0 24 Variable 0 0 0 0 0 0 0 Total 35 253 219 48 12 0 567 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 35 Hours of missing stability measurements in all stability classes: 3 Page 50 of 108

Clinton Power Station Period of Record: January - March 2021 Stability Class - Moderately Stable - 60m-10m Delta-T (F)

Winds Measured at 10 Meters Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 5 0 0 0 0 5 NNE 0 2 0 0 0 0 2 NE 3 13 2 0 0 0 18 ENE 6 6 0 0 0 0 12 E 3 1 0 0 0 0 4 ESE 2 4 0 0 0 0 6 SE 5 7 0 0 0 0 12 SSE 2 6 1 0 0 0 9 s 1 7 5 0 0 0 13 SSW 0 5 4 0 0 0 9 SW 0 1 0 0 0 0 1 WSW 0 1 0 0 0 0 1 w 0 3 0 0 0 0 3 WNW 1 9 0 0 0 0 10 NW 0 2 0 0 0 0 2 NNW 2 1 0 0 0 0 3 Variable 0 0 0 0 0 0 0 Total 25 73 12 0 0 0 110 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 Page 51 of 108

Clinton Power Station Period of Record: January - March 2021 Stability Class - Extremely Stable - 60m-10m Oelta-T (F)

Winds Measured at 10 Meters Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 0 0 0 0 NNE 0 4 0 0 0 0 4 NE 3 10 0 0 0 0 13 ENE 1 1 0 0 0 0 2 E 1 0 0 0 0 0 1 ESE 0 0 0 0 0 0 0 SE 0 1 0 0 0 0 1 SSE 0 0 0 0 0 0 0 s 0 0 0 0 0 0 0 SSW 0 2 0 0 0 0 2 SW 0 0 0 0 0 0 0 WSW 0 0 0 0 0 0 0 w 0 2 0 0 0 0 2 WNW 1 2 0 0 0 0 3 NW 1 1 0 0 0 0 2 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 7 23 0 0 0 0 30 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 Page 52 of 108

Clinton Power Station Period of Record: January - March 2021 Stability Class - Extremely Unstable - 6 Orn-1 Orn Delta-T (F)

Winds Measured at 60 Meters Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 3 0 0 3 NNE 0 0 0 0 0 0 0 NE 0 0 1 2 0 0 3 ENE 0 0 1 6 1 0 8 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 1 1 1 0 0 3 SSE 0 0 0 0 0 0 0 s 0 0 0 0 0 0 0 SSW 0 0 0 1 0 0 1 SW 0 0 0 0 0 0 0 WSW 0 0 0 0 0 0 0 w 0 0 0 0 0 0 0 WNW 0 0 0 1 3 2 6 NW 0 0 1 4 0 1 6 NNW 0 0 1 1 0 0 2 Variable 0 0 0 0 0 0 0 Total 0 1 5 19 4 3 32 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 4 Hours of missing stability measurements in all stability classes: 3 Page 53 of 108

Clinton Power Station Period of Record: January - March 2021 Stability Class - Moderately Unstable - 60m-10m Delta-T (F)

Winds Measured at 60 Meters Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 1 1 2 2 0 6 NNE 0 0 0 1 0 0 1 NE 0 0 0 4 0 0 4 ENE 0 0 0 3 1 0 4 E 0 0 0 0 0 0 0 ESE 0 1 0 0 0 0 1 SE 0 3 5 2 0 0 10 SSE 0 1 1 2 0 0 4 s 0 0 2 8 3 0 13 SSW 0 0 0 3 0 0 3 SW 0 0 0 0 0 1 1 WSW 0 0 0 0 2 0 2 w 0 1 0 0 2 0 3 WNW 0 0 1 3 0 1 5 NW 0 0 6 5 3 4 18 NNW 0 0 2 3 0 0 5 Variable 0 0 0 0 0 0 0 Total 0 7 18 36 13 6 80 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 Page 54 of 108

Clinton Power Station Period of Record: January - March 2021 Stability Class - Slightly Unstable - 60m-10m Delta-T (F)

Winds Measured at 60 Meters Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 8 5 1 0 14 NNE 0 1 0 4 0 0 5 NE 0 0 1 5 0 0 6 ENE 0 0 2 3 0 0 5 E 0 0 0 0 0 0 0 ESE 0 2 4 0 0 0 6 SE 0 3 5 0 0 0 8 SSE 0 0 1 2 0 0 3 s 0 6 3 4 2 2 17 SSW 0 1 1 5 0 1 8 SW 0 0 0 1 1 0 2 WSW 0 0 0 3 1 0 4 w 0 0 0 4 1 0 5 WNW 0 0 3 5 1 0 9 NW 0 1 6 1 0 1 9 NNW 0 1 2 9 3 0 15 Variable 0 0 0 0 0 0 0 Total 0 15 36 51 10 4 116 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 11 Hours of missing stability measurements in all stability classes: 3 Page 55 of 108

Clinton Power Station Period of Record: January - March 2021 Stability Class - Neutral - 60m-10m Delta-T (F)

Winds Measured at 60 Meters Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 2 18 62 22 0 104 NNE 1 5 20 23 3 4 56 NE 0 5 26 20 5 16 72 ENE 0 5 19 19 22 3 68 E 0 4 8 6 1 7 26 ESE 0 3 10 5 3 0 21 SE 0 3 16 23 5 1 48 SSE 0 5 5 19 13 3 45 s 0 5 13 14 9 12 53 SSW 2 3 8 21 6 7 47 SW 0 4 13 16 8 1 42 WSW 0 4 15 12 14 0 45 w 0 2 21 33 18 8 82 WNW 1 4 26 24 14 9 78 NW 0 7 19 40 16 7 89 NNW 0 11 15 42 16 0 84 Variable 0 0 0 0 0 0 0 Total 4 72 252 379 175 78 960 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 212 Hours of missing stability measurements in all stability classes: 3 Page 56 of 108

Clinton Power Station Period of Record: January - March 2021 Stability Class - Slightly Stable - 60m-10m Delta-T (F)

Winds Measured at 60 Meters Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 4 6 6 0 0 17 NNE 0 3 11 1 2 1 18 NE 0 2 5 5 3 9 24 ENE 1 3 11 12 1 0 28 E 0 3 11 11 2 0 27 ESE 0 1 16 23 0 0 40 SE 0 3 15 10 2 0 30 SSE 0 0 6 22 10 4 42 s 0 0 1 31 22 10 64 SSW 0 0 6 29 22 6 63 SW 1 0 9 18 11 0 39 WSW 1 0 1 8 10 0 20 w 0 1 7 10 5 0 23 WNW 0 0 10 12 2 0 24 NW 0 4 22 18 7 0 51 NNW 0 3 4 16 0 0 23 Variable 0 0 0 0 0 0 0 Total 4 27 141 232 99 30 533 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 69 Hours of missing stability measurements in all stability classes: 3 Page 57 of 108

Clinton Power Station Period of Record: January - March 2021 Stability Class - Moderately Stable - 60m-10m Delta-T (F)

Winds Measured at 60 Meters Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 4 2 0 0 6 NNE 0 1 0 3 0 0 4 NE 0 1 0 4 1 0 6 ENE 0 0 2 4 0 0 6 E 0 0 5 5 0 0 , 10 ESE 0 1 4 1 0 0 6 SE 0 2 7 0 0 0 9 SSE 0 0 4 4 2 0 10 s 0 1 0 6 3 0 10 SSW 0 1 1 8 0 0 10 SW 0 0 0 8 1 0 9 WSW 0 0 0 0 0 0 0 w 0 0 2 0 0 0 2 WNW 0 0 0 4 0 0 4 NW 0 0 1 6 0 0 7 NNW 0 1 3 0 0 0 4 Variable 0 0 0 0 0 0 0 Total 0 8 33 55 7 0 103 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 7 Hours of missing stability measurements in all stability classes: 3 Page 58 of 108

Clinton Power Station Period of Record: January - March 2021 Stability Class - Extremely Stable - 60m-10m Delta-T (F)

Winds Measured at 60 Meters Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 2 0 0 0 0 2 NNE 0 0 1 2 0 0 3 NE 0 0 2 1 0 0 3 ENE 0 0 2 4 0 0 6 E 0 0 4 1 0 0 5 ESE 0 0 2 0 0 0 2 SE 0 0 0 0 0 0 0 SSE 0 0 0 1 0 0 1 s 0 0 0 0 0 0 0 SSW 0 0 0 0 0 0 0 SW 0 0 0 2 0 0 2 WSW 0 0 0 0 0 0 0 w 0 0 0 0 0 0 0 WNW 0 0 1 2 0 0 3 NW 0 0 0 1 0 0 1 NNW 0 0 2 0 0 0 2 Variable 0 0 0 0 0 0 0 Total 0 2 14 14 0 0 30 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all Page 59 of 108

Clinton Power Station Period of Record: April - June 2021 Stability Class - Extremely Unstable - 60m-10m Delta-T (F)

Winds Measured at 10 Meters Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 5 1 0 0 6 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 0 0 0 0 0 0 SSE 0 0 2 0 0 0 2 s 0 0 3 0 0 0 3 SSW 0 0 0 0 0 0 0 SW 0 0 0 2 0 0 2 WSW 0 0 0 1 0 0 1 w 0 0 3 9 0 0 12 WNW 0 0 9 4 0 0 13 NW 0 0 0 2 0 0 2 NNW 0 0 10 6 0 0 16 Variable 0 0 0 0 0 0 0 Total 0 0 32 25 0 0 57 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 Page 60 of 108

Clinton Power Station Period of Record: April - June 2021 Stability Class - Moderately Unstable - 60m-10m Delta-T (F)

Winds Measured at 10 Meters Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 2 0 0 0 2 NNE 0 1 1 0 0 0 2 NE 0 5 0 0 0 0 5 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 1 0 0 0 0 1 SSE 0 0 0 0 0 0 0 s 0 0 1 1 3 0 5 SSW 0 0 1 8 0 0 9 SW 0 0 3 8 0 0 11 WSW 0 0 2 1 0 0 3 w 0 0 0 0 0 0 0 WNW 0 0 7 2 0 0 9 NW 0 0 4 1 0 0 5 NNW 0 0 2 1 0 0 3 Variable 0 0 0 0 0 0 0 Total 0 7 23 22 3 0 55 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 Page 61 of 108

Clinton Power Station Period of Record: April - June 2021 Stability Class - Slightly Unstable - 60m-10m Delta-T (F)

Winds Measured at 10 Meters Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 4 7 0 0 0 11 NNE 0 3 3 0 0 0 6 NE 0 1 2 2 0 0 5 ENE 0 2 0 0 0 0 2 E 0 3 0 0 0 0 3 ESE 0 2 0 0 0 0 2 SE 0 0 0 0 0 0 0 SSE 0 0 0 0 0 0 0 s 0 2 1 4 1 0 8 SSW 0 1 4 7 0 0 12 SW 0 0 5 4 0 0 9 WSW 0 2 1 5 0 0 8 w 0 0 3 1 0 0 4 WNW 0 2 2 0 0 0 4 NW 0 0 4 1 0 0 5 NNW 0 2 2 0 0 0 4 Variable 0 0 0 0 0 0 0 Total 0 24 34 24 1 0 83 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 Page 62 of 108

Clinton Power Station Period of Record: April - June 2021 Stability Class - Neutral - 60m-10m Delta-T (F)

Winds Measured at 10 Meters Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 2 32 24 5 0 0 63 NNE 3 24 13 5 0 0 45 NE 5 20 18 14 0 0 57 ENE 4 26 27 0 0 0 57 E 3 11 2 0 0 0 16 ESE 5 12 7 0 0 0 24 SE 4 10 8 3 0 0 25 SSE 2 22 17 5 0 0 46 s 7 24 39 26 3 0 99 SSW 3 22 52 42 4 0 123 SW 8 22 24 12 0 0 66 WSW 5 26 28 2 0 0 61 w 2 17 18 5 0 0 42 WNW 3 11 21 7 0 0 42 NW 2 12 18 4 0 0 36 NNW 1 25 27 4 0 0 57 Variable 0 0 0 0 0 0 0 Total 59 316 343 134 7 0 859 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 Page 63 of 108

Clinton Power Station Period of Record: April - June 2021 Stability Class - Slightly Stable - 60m-10m Delta-T (F)

Winds Measured at 10 Meters Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 10 19 6 0 0 0 35 NNE 12 10 11 1 0 0 34 NE 11 27 11 1 0 0 50 ENE 8 22 3 0 0 0 33 E 10 45 4 0 0 0 59 ESE 6 38 13 1 0 0 58.

SE 12 23 11 1 0 0 47 SSE 10 24 29 1 0 0 64 s 14 42 72 4 1 0 133 SSW 10 39 65 13 2 0 129 SW 14 26 23 2 0 0 65 WSW 5 28 7 1 0 0 41 w 8 17 9 1 0 0 35 WNW 10 30 8 0 0 0 48 NW 5 11 7 0 0 0 23 NNW 3 17 10 0 0 0 30 Variable 0 0 0 0 0 0 0 Total 148 418 289 26 3 0 884 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 Page 64 of 108

Clinton Power Station Period of Record: April - June 2021 Stability Class - Moderately Stable - 60m-10m Delta-T (F)

Winds Measured at 10 Meters Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 5 2 0 0 0 0 7 NNE 2 0 0 0 0 0 2 NE 1 0 0 0 0 0 1 ENE 3 1 0 0 0 0 4 E 6 3 0 0 0 0 9 ESE 5 4 0 0 0 0 9 SE 2 2 0 0 0 0 4 SSE 8 4 0 0 0 0 12 s 5 6 1 0 0 0 12 SSW 5 9 1 0 0 0 15 SW 10 19 1 0 0 0 30 WSW 10 8 0 0 0 0 18 w 9 6 0 0 0 0 15 WNW 11 4 0 0 0 0 15 NW 17 6 1 0 0 0 24 NNW 14 6 0 0 0 0 20 Variable 0 0 0 0 0 0 0 Total 113 80 4 0 0 0 197 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 Page 65 of 108

Clinton Power Station Period of Record: April - June 2021 Stability Class - Extremely Stable - 60m-10m Delta-T (F)

Winds Measured at 10 Meters Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 4 0 0 0 0 0 4 NNE 2 0 0 0 0 0 2 NE 1 0 0 0 0 0 1 ENE 1 0 0 0 0 0 1 E l 0 0 0 0 0 1 ESE 4 2 0 0 0 0 6 SE l 0 0 0 0 0 1 SSE 1 0 0 0 0 0 1 s 4 0 0 0 0 0 4 SSW 2 0 0 0 0 0 2 SW 3 2 0 0 0 0 5 WSW 2 0 0 0 0 0 2 w 4 0 0 0 0 0 4 WNW 2 0 0 0 0 0 2 NW 4 0 0 0 0 0 4 NNW 7 2 0 0 0 0 9 Variable 0 0 0 0 0 0 0 Total 43 6 0 0 0 0 49 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 Page 66 of 108

Clinton Power Station Period of Record: April - June 2021 Stability Class - Extremely Unstable - 60m-10m Delta-T (F)

Winds Measured at 60 Meters Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 8 0 0 8 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 0 0 0 0 0 0 SSE 0 0 2 0 0 0 2 s 0 0 2 1 0 0 3 SSW 0 0 0 0 0 0 0 SW 0 0 0 1 2 0 3 WSW 0 0 0 0 0 0 0 w 0 0 0 9 4 0 13 WNW 0 0 3 5 2 0 10 NW 0 0 0 3 1 0 4 NNW 0 0 0 11 3 0 14 Variable 0 0 0 0 0 0 0 Total 0 0 7 38 12 0 57 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 Page 67 of 108

Clinton Power Station Period of Record: April - June 2021 Stability Class - Moderately Unstable - 60m-10m Delta-T (F)

Winds Measured at 60 Meters Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 1 1 0 0 2 NNE 0 1 1 0 0 0 2 NE 0 4 1 0 0 0 5 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 0 1 0 0 0 1 SSE 0 0 0 0 0 0 0 s 0 0 0 1 0 4 5 SSW 0 0 0 2 7 0 9 SW 0 0 1 4 4 0 9 WSW 0 0 1 2 2 0 5 w 0 0 0 0 0 0 0 WNW 0 0 3 6 0 0 9 NW 0 0 0 2 1 0 3 NNW 0 0 1 3 1 0 5 Variable 0 0 0 0 0 0 0 Total 0 5 10 21 15 4 55 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 Page 68 of 108

Clinton Power Station Period of Record: April - June 2021 Stability Class - Slightly Unstable - 60m-10m Delta-T (F)

Winds Measured at 60 Meters Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 3 4 5 0 0 12 NNE 0 1 4 1 0 0 6 NE 0 2 0 3 0 0 5 ENE 0 2 0 0 0 0 2 E 0 2 1 0 0 0 3 ESE 0 1 1 0 0 0 2 SE 0 0 0 0 0 0 0 SSE 0 0 0 0 0 0 0 s 0 1 1 1 2 3 8 SSW 0 1 1 1 6 1 10 SW 0 0 3 5 3 0 11 WSW 0 1 3 3 3 0 10 w 0 0 1 1 0 0 2 WNW 0 1 2 1 0 0 4 NW 0 0 1 3 0 0 4 NNW 0 1 1 2 0 0 4 Variable 0 0 0 0 0 0 0 Total 0 16 23 26 14 4 83 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 Page 69 of 108

Clinton Power Station Period of Record: April - June 2021 Stability Class - Neutral - 60m-10m Delta-T (F)

Winds Measured at 60 Meters Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 19 24 22 1 0 66 NNE 2 15 14 9 3 0 43 NE 3 14 11 19 6 0 53 ENE 3 20 27 8 0 0 58 E 6 11 4 2 0 0 23 ESE 4 6 11 1 0 0 22 SE 1 16 7 4 1 0 29 SSE 3 12 7 19 7 0 48 s 2 18 24 27 22 5 98 SSW 4 9 39 36 22 9 119 SW 4 18 17 21 5 3 68 WSW 3 21 21 15 2 0 62 w 0 10 11 9 5 0 35 WNW 1 8 6 20 5 1 . 41 NW 1 5 5 19 3 0 33 NNW 1 15 24 21 0 0 61 Variable 0 0 0 0 0 0 0 Total 38 217 252 252 82 18 859 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 Page 70 of 108

Clinton Power Station Period of Record: April - June 2021 Stability Class - Slightly Stable - 60m-10m Delta-T (F)

Winds Measured at 60 Meters Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 8 14 9 0 0 32 NNE 0 11 16 7 0 0 34 NE 1 18 19 8 0 0 46 ENE 0 29 11 4 0 0 44 E 6 18 32 4 0 0 60 ESE 1 13 24 16 0 0 54 SE 4 18 24 8 0 0 54 SSE 1 12 34 16 2 0 65 s 5 21 40 60 6 3 135 SSW 1 22 40 59 17 4 143 SW 1 11 22 18 3 0 55 WSW 1 2 22 6 2 0 33 w 1 15 11 15 0 0 42 WNW 0 6 23 15 0 0 44 NW 0 5 3 8 0 0 16 NNW 1 6 6 14 0 0 27 Variable 0 0 0 0 0 0 0 Total 24 215 341 267 30 7 884 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 Page 71 of 108

Clinton Power Station Period of Record: April - June 2021 Stability Class - Moderately Stable - 60m-10m Delta-T (F)

Winds Measured at 60 Meters Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 5 6 2 0 0 0 13 NNE 3 8 5 0 0 0 16 NE 2 4 0 0 0 0 6 ENE 7 0 0 0 0 0 7 E 3 2 1 0 0 0 6 ESE 3 7 3 0 0 0 13 SE 1 7 0 0 0 0 8 SSE 1 3 2 0 0 0 6 s 1 3 8 2 0 0 14 SSW 0 6 18 5 0 0 29 SW 2 2 6 7 0 0 17 WSW 2 2 9 2 0 0 15 w 3 6 2 2 0 0 13 WNW 2 4 6 0 0 0 12 NW 2 6 2 3 0 0 13 NNW 1 3 3 2 0 0 9 Variable 0 0 0 0 0 0 0 Total 38 69 67 23 0 0 197 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 Page 72 of 108

Clinton Power Station Period of Record: April - June 2021 Stability Class - Extremely Stable - 6 Orn-1 Orn Delta-T (F)

Winds Measured at 60 Meters Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 4 0 0 0 0 4 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 2 1 0 0 0 0 3 ESE 0 4 0 0 0 0 4 SE 0 0 0 0 0 0 0 SSE 0 0 3 0 0 0 3 s 1 0 0 0 0 0 1 SSW 1 4 0 0 0 0 5 SW 1 2 1 0 0 0 4 WSW 1 2 2 1 0 0 6 w 3 4 2 0 0 0 9 WNW 0 2 1 0 0 0 3 NW 1 3 0 0 0 0 4 NNW 0 3 0 0 0 0 3 Variable 0 0 0 0 0 0 0 Total 10 29 9 1 0 0 49 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 Clinton Power Station Page 73 of 108

Period of Record: July - September 2021 Stability Class - Extremely Unstable - 60m-10m Delta-T (F)

Winds Measured at 10 Meters Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 3 0 0 0 3 NNE 0 0 0 0 0 0 0 NE 0 1 3 0 0 0 4 ENE 0 1 2 0 0 0 3 E 0 0 0 0 0 0 0 ESE 0 1 0 0 0 0 1 SE 0 0 0 0 0 0 0 SSE 0 0 0 0 0 0 0 s 0 0 0 0 0 0 0 SSW 0 0 1 0 0 0 1 SW 0 0 0 0 0 0 0 WSW 0 0 0 0 0 0 0 w 0 0 1 0 0 0 1 WNW 0 0 0 0 0 0 0 NW 0 0 0 0 0 0 0 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 3 10 0 0 0 13 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 Page 74 of 108

Clinton Power Station Period of Record: July - September 2021 Stability Class - Moderately Unstable - 6 Orn-1 Orn Delta-T (F)

Winds Measured at 10 Meters Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 4 1 2 0 0 7 NNE 0 2 2 0 0 0 4 NE 0 3 1 0 0 0 4 ENE 0 3 1 0 0 0 4 E 0 2 1 0 0 0 3 ESE 0 2 0 0 0 0 2 SE 0 4 0 0 0 0 4 SSE 0 0 0 0 0 0 0 s 0 4 3 0 0 0 7 SSW 0 1 5 1 0 0 7 SW 0 1 4 1 0 0 6 WSW 0 0 4 2 0 0 6 w 0 0 4 1 0 0 5 WNW 0 0 3 0 0 0 3 NW 0 6 4 4 0 0 14 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 32 33 11 0 0 76 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 Page 75 of 108

Clinton Power Station Period of Record: July - September 2021 Stability Class - Slightly Unstable - 60m-10m Delta-T (F)

Winds Measured at 10 Meters Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 2 4 0 0 0 6 NNE 0 4 2 0 0 0 6 NE 1 12 2 0 0 0 15 ENE 0 10 0 0 0 0 10 E 0 4 0 0 0 0 4 ESE 0 2 0 0 0 0 2 SE 0 4 0 0 0 0 4 SSE 0 4 0 0 0 0 4 s 0 9 5 1 0 0 15 SSW 0 8 9 6 0 0 23 SW 0 3 17 5 0 0 25 WSW 0 3 5 7 0 0 15 w 0 0 1 0 0 0 1 WNW 0 1 1 0 0 0 2 NW 0 7 6 0 0 0 13 NNW 0 0 1 0 0 0 1 Variable 0 0 0 0 0 0 0 Total 1 73 53 19 0 0 14 6 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 Page 76 of 108

Clinton Power Station Period of Record: July - September 2021 Stability Class - Neutral - 60rn-l Orn Delta-T (F)

Winds Measured at 10 Meters Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 4 25 4 0 0 0 33 NNE 1 32 8 2 0 0 43 NE 2 40 18 0 0 0 60 ENE 3 24 0 0 0 0 27 E 5 21 2 0 0 0 28 ESE 7 10 1 0 0 0 18 SE 3 21 1 0 0 0 25 SSE 8 42 7 0 0 0 57 s 8 33 22 1 0 0 64 SSW 2 30 57 15 0 0 104 SW 0 29 34 15 0 0 78 WSW 3 26 16 2 0 0 47 w 5 23 12 2 0 0 42 WNW 5 24 14 0 0 0 43 NW 6 38 10 1 0 0 55 NNW 4 22 10 0 0 0 36 Variable 0 0 0 0 0 0 0 Total 66 440 216 38 0 0 7 60 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 Page 77 of 108

Clinton Power Station Period of Record: July - September 2021 Stability Class - Slightly Stable - 60m-10m Delta-T (F)

Winds Measured at 10 Meters Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 8 21 8 0 0 0 37 NNE 5 30 7 0 0 0 42 NE 13 50 20 0 0 0 83 ENE 14 27 0 0 0 0 41 E 11 20 0 0 0 0 31 ESE 16 12 1 0 0 0 29 SE 11 11 1 0 0 0 23 SSE 11 33 3 0 0 0 47 s 15 62 19 0 0 0 96 SSW 18 60 61 3 0 0 142 SW 10 28 18 0 0 0 56 WSW 5 8 5 1 0 0 19 w 5 23 0 0 0 0 28 WNW 11 24 2 0 0 0 37 NW 12 25 3 0 0 0 40 NNW 11 24 1 1 0 0 37 Variable 0 0 0 0 0 0 0 Total 176 458 149 5 0 0 788 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 Page 78 of 108

Clinton Power Station Period of Record: July - September 2021 Stability Class - Moderately Stable - 60m-10m Delta-T (F)

Winds Measured at 10 Meters Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 2 5 0 0 0 0 7 NNE 5 2 0 0 0 0 7 NE 18 18 0 0 0 0 36 ENE 6 9 0 0 0 0 15 E 8 4 0 0 0 0 12 ESE 6 1 0 0 0 0 7 SE 3 4 0 0 0 0 7 SSE 2 0 0 0 0 0 2 s 2 2 0 0 0 Q 4 SSW 10 13 1 0 0 0 24 SW 18 26 0 0 0 1 45 WSW 9 9 0 0 0 0 18 w 14 9 1 0 0 0 24 WNW 10 5 0 0 0 0 15 NW 14 16 2 0 0 0 32 NNW 4 2 0 0 0 0 6 Variable 0 0 0 0 0 0 0 Total 131 125 4 0 0 1 261 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 Page 79 of 108

Clinton Power Station Period of Record: July - September 2021 Stability Class - Extremely Stable - 60m-10m Delta-T (F)

Winds Measured at 10 Meters Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 10 2 0 0 0 0 12 NNE 18 2 0 0 0 0 20 NE 26 25 0 0 0 0 51 ENE 9 0 0 0 0 0 9 E 8 0 0 0 0 0 8 ESE 4 0 0 0 0 0 4 SE 0 0 0 0 0 0 0 SSE 0 0 0 0 0 0 0 s 0 0 0 0 0 0 0 SSW 6 1 0 0 0 0 7 SW 5 7 0 0 0 0 12 WSW 10 2 0 0 0 0 12 w 2 0 0 0 0 0 2 WNW 4 0 0 0 0 0 4 NW 14 2 0 0 0 0 16 NNW 7 0 0 0 0 0 7 Variable 0 0 0 0 0 0 0 Total 123 41 0 0 0 0 164 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 Page 80 of 108

Clinton Power Station Period of Record: July - September 2021 Stability Class - Extremely Unstable - 60m-10m Delta-T (F)

Winds Measured at 60 Meters Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 2 1 0 0 3 NNE 0 0 0 0 0 0 0 NE 0 0 1 1 0 0 2 ENE 0 0 2 3 0 0 5 E 0 0 0 0 0 0 0 ESE 0 0 1 0 0 0 1 SE 0 0 0 0 0 0 0 SSE 0 0 0 0 0 0 0 s 0 0 0 0 0 0 0 SSW 0 0 0 1 0 0 1 SW 0 0 0 0 0 0 0 WSW 0 0 0 0 0 0 0 w 0 0 0 1 0 0 1 WNW 0 0 0 0 0 0 0 NW 0 0 0 0 0 0 0 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 0 6 7 0 0 13 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 Page 81 of 108

Clinton Power Station Period of Record: July - September 2021 Stability Class - Moderately Unstable - 60m-10m Delta-T (F)

Winds Measured at 60 Meters Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 3 1 0 2 0 6 NNE 0 0 2 0 0 0 2 NE 0 2 1 3 0 0 6 ENE 0 1 4 0 0 0 5 E 0 2 0 1 0 0 3 ESE 0 0 2 0 0 0 2 SE 0 3 1 0 0 0 4 SSE 0 0 0 0 0 0 0 s 0 1 4 2 0 0 7 SSW 0 1 1 4 0 0 6 SW 0 1 2 4 0 0 7 WSW 0 0 1 3 2 0 6 w 0 0 1 3 0 0 4 WNW 0 0 1 2 0 0 3 NW 0 0 5 4 3 0 12 NNW 0 0 3 0 0 0 3 Variable 0 0 0 0 0 0 0 Total 0 14 29 26 7 0 76 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 Page 82 of 108

Clinton Power Station Period of Record: July - September 2021 Stability Class - Slightly Unstable - 60m-10m Delta-T (F)

Winds Measured at 60 Meters Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 2 0 3 0 5 NNE 0 5 2 1 0 0 8 NE 0 6 3 1 0 0 10 ENE 0 6 6 1 0 0 13 E 0 4 0 0 0 0 4 ESE 0 2 0 0 0 0 2 SE 0 5 0 0 0 0 5 SSE 0 2 2 0 0 0 4 s 0 4 6 3 2 1 16 SSW 0 2 10 7 3 0 22 SW 0 1 10 10 1 0 22 WSW 0 3 3 4 6 0 16 w 0 0 1 1 1 0 3 WNW 0 0 1 1 0 0 2 NW 0 1 6 4 0 0 11 NNW 0 1 2 0 0 0 3 Variable 0 0 0 0 0 0 0 Total 0 42 54 33 16 1 146 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 Page 83 of 108

Clinton Power Station Period of Record: July - September 2021 Stability Class - Neutral - 60m-10m Delta-T (F)

Winds Measured at 60 Meters Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 4 9 14 4 3 0 34 NNE 2 15 17 7 0 0 41 NE 1 28 27 8 0 0 64 ENE 1 11 15 0 0 0 27 E 3 12 14 0 0 0 29 ESE 2 8 5 0 0 0 15 SE 4 10 7 0 0 0 21 SSE 4 16 26 13 0 0 59 s 2 15 21 19 3 1 61 SSW 1 16 27 36 16 3 99 SW 4 12 36 29 10 0 91 WSW 0 16 24 5 2 0 47 w 0 15 19 4 1 0 39 WNW 3 11 18 7 0 0 39 NW 4 14 30 7 1 0 56 NNW 4 15 11 8 0 0 38 Variable 0 0 0 0 0 0 0 Total 39 223 311 147 36 4 7 60 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 Page 84 of 108

Clinton Power Station Period of Record: July - September 2021 Stability Class - Slightly Stable - 60m-10m Delta-T (F)

Winds Measured at 60 Meters Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 16 15 13 0 0 45 NNE 1 20 18 4 1 0 44 NE 4 12 32 20 1 0 69 ENE 2 27 23 5 0 0 57 E 3 10 19 3 0 0 35 ESE 1 11 8 1 0 0 21 SE 1 12 11 2 0 0 26 SSE 1 11 32 6 0 0 50 s 0 10 36 41 1 0 88 SSW 0 17 58 52 15 0 142 SW 0 14 27 28 0 0 69 WSW 1 5 7 6 3 0 22 w 2 0 23 4 0 0 29 WNW 1 5 7 4 0 0 17 NW 2 10 17 9 0 0 38 NNW 1 8 22 4 0 1 36 Variable 0 0 0 0 0 0 0 Total 21 188 355 202 21 1 788 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 Page 85 of 108

Clinton Power Station Period of Record: July - September 2021 Stability Class - Moderately Stable - 60m-10m Delta-T (F)

Winds Measured at 60 Meters Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 5 5 1 0 0 11 NNE 0 1 2 1 0 0 4 NE 0 6 3 3 0 0 12 ENE 0 2 10 10 0 0 22 E 1 4 6 10 0 0 21 ESE 1 3 2 6 0 0 12 SE 0 4 5 0 0 0 9 SSE 0 2 6 0 0 1 9 s 2 2 2 1 0 0 7 SSW 3 7 13 0 0 0 23 SW 1 7 23 14 0 0 45 WSW 3 4 5 3 0 0 15 w 2 5 4 9 0 0 20 WNW 0 3 9 1 0 0 13 NW 2 6 7 5 0 0 20 NNW 3 2 7 6 0 0 18 Variable 0 0 0 0 0 0 0 Total 18 63 109 70 0 1 2 61 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 Page 86 of 108

Clinton Power Station Period of Record: July - September 2021 Stability Class - Extremely Stable - 60m-10m Delta-T (F)

Winds Measured at 60 Meters Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 1 3 0 0 0 5 NNE 2 3 3 2 0 0 10 NE 0 2 5 1 0 0 8 ENE 1 2 7 12 0 0 22 E 0 9 9 10 0 0 28 ESE 1 4 5 1 0 0 11 SE 0 5 2 0 0 0 7 SSE 0 5 0 0 0 0 5 s 2 3 0 0 0 0 5 SSW 4 6 0 0 0 0 10 SW 0 2 3 4 0 0 9 WSW 1 1 3 6 0 0 11 w 0 3 1 5 0 0 9 WNW 1 1 2 0 0 0 4 NW 1 3 4 1 0 0 9 NNW 1 5 5 0 0 0 11 Variable 0 0 0 0 0 0 0 Total 15 55 52 42 0 0 164 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 Clinton Power Station Page 87 of 108

Period of Record: October - December2021 Stability Class - Extremely Unstable - 60m-10m Delta-T (F)

Winds Measured at 10 Meters Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 0 0 0 0 NNE 0 *o 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 0 0 0 0 0 0 SSE 0 0 0 0 0 0 0 s 0 0 0 0 0 0 0 SSW 0 0 0 0 0 0 0 SW 0 0 0 0 0 0 0 WSW 0 0 0 0 0 0 0 w 1 0 0 0 0 0 1 WNW 0 0 0 0 0 0 0 NW 0 0 0 0 0 0 0 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 1 0 0 0 0 0 1 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 Page 88 of 108

Clinton Power Station Period of Record: October - Decernber2021 Stability Class - Moderately Unstable - 60m-10m Delta-T (F)

Winds Measured at 10 Meters Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 0 0 0 0 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 2 4 0 0 0 6 SSE 0 0 4 0 0 0 4 s 0 0 0 0 0 0 0 SSW 0 0 0 0 0 0 0 SW 0 0 0 0 0 0 0 WSW 0 0 0 0 0 0 0 w 0 0 0 1 0 0 1 WNW 0 0 4 1 0 0 5 NW 0 0 6 2 0 0 8 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 2 18 4 0 0 24 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 Page 89 of 108

Clinton Power Station Period of Record: October - Decernber2021 Stability Class - Slightly Unstable - 60m-10m Delta-T (F)

Winds Measured at 10 Meters Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 1 1 0 0 2 NNE 0 0 2 0 0 0 2 NE 0 0 3 0 0 0 3 ENE 0 1 1 0 0 0 2 E 0 3 1 0 0 0 4 ESE 0 3 0 0 0 0 3 SE 0 4 3 0 0 0 7 SSE 0 2 7 0 0 0 9 s 0 4 6 0 0 0 10 SSW 0 0 8 1 0 0 9 SW 0 0 4 0 0 0 4 WSW 0 0 1 0 0 0 1 w 0 0 4 5 1 0 10 WNW 0 0 3 5 5 0 13 NW 0 1 11 4 1 0 17 NNW 0 2 0 2 0 0 4 Variable 0 0 0 0 0 0 0 Total 0 20 55 18

7 0 100 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 Page 90 of 108

Clinton Power Station Period of Record: October - December2021 Stability Class - Neutral - 60m-10m Oelta-T (F)

Winds Measured at 10 Meters Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 13 22 11 0 0 47 NNE 2 12 10 0 0 0 24 NE 0 12 8 0 0 0 20 ENE 1 17 10 0 0 0 28 E 1 25 15 0 0 0 41 ESE 1 24 13 0 0 0 38 SE 4 16 16 0 0 0 36 SSE 0 20 63 3 0 0 86 s 2 25 42 23 4 0 96 SSW 1 27 57 42 1 1 129 SW 0 21 21 6 0 0 48 WSW 2 10 16 9 3 0 40 w 2 14 20 35 5 2 78 WNW 0 13 34 31 9 0 87 NW 1 19 59 22 4 0 105 NNW 1 29 32 3 0 0 65 Variable 0 0 0 0 0 0 0 Total 19 297 438 185 26 3 968 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 Page 91 of 108

Clinton Power Station Period of Record: October - December2021 Stability Class - Slightly Stable - 60m-10m Delta-T (F)

Winds Measured at 10 Meters Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 3 9 2 0 0 0 14 NNE 0 20 6 0 0 0 26 NE 7 28 2 1 0 0 38 ENE 4 17 1 0 0 0 22 E 6 33 7 0 0 0 46 ESE 2 31 3 0 0 0 36 SE 10 29 3 0 0 0 42 SSE 11 35 28 2 0 0 76 s 5 44 67 12 1 1 130 SSW 5 31 50 27 2 3 118 SW 0 17 31 8 0 0 56 WSW 3 14 16 1 0 0 34 w 6 15 17 0 0 0 38 WNW 4 70 21 3 0 0 98 NW 5 23 16 1 0 0 45 NNW 0 15 8 2 0 0 25 Variable 0 0 0 0 0 0 0 Total 71 431 278 57 3 4 844 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 Page 92 of 108

Clinton Power Station Period of Record: October - Decernber2021 Stability Class - Moderately Stable - 60m-10m Delta-T (F)

Winds Measured at 10 Meters Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 3 3 1 0 0 0 7 NNE 5 4 1 0 0 0 10 NE 4 12 0 0 0 0 16 ENE 1 2 0 0 0 0 3 E 6 4 0 0 0 0 10 ESE 4 4 0 0 0 0 8 SE 4 5 0 0 0 0 9 SSE 4 17 0 0 0 0 21 s 3 16 0 0 0 0 19 SSW 3 13 4 0 0 0 20 SW 2 3 2 0 0 0 7 WSW 1 3 3 0 0 0 7 w 3 10 1 0 0 0 14 WNW 7 9 0 0 0 0 16 NW 4 9 0 0 0 0 13 NNW 8 3 0 0 0 0 11 Variable 0 0 0 0 0 0 0 Total 62 117 12 0 0 0 191 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 Page 93 of 108

Clinton Power Station Period of Record: October - December2021 Stability Class - Extremely Stable - 60m-10m Delta-T (F)

Winds Measured at 10 Meters Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 2 0 0 0 0 0 2 NNE 4 0 0 0 0 0 4 NE 5 6 0 0 0 0 11 ENE 0 1 0 0 0 0 1 E 6 0 0 0 0 0 6 ESE 4 0 0 0 0 0 4 SE 6 1 0 0 0 0 7 SSE 5 4 0 0 0 0 9 s 3 1 0 0 0 0 4 SSW 2 4 0 0 0 0 6 SW 8 2 0 0 0 0 10 WSW 6 1 0 0 0 0 7 w 2 1 0 0 0 0 3 WNW 1 0 0 0 0 0 1 NW 3 1 0 0 0 0 4 NNW 1 0 0 0 0 0 1 Variable 0 0 0 0 0 0 0 Total 58 22 0 0 0 0 80 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 Page 94 of 108

Clinton Power Station Period of Record: October - December2021 Stability Class - Extremely Unstable - 6 0rn-1 Orn Delta-T (F)

Winds Measured at 60 Meters Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 0 0 0 0 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 0 0 0 0 0 0 SSE 0 0 0 0 0 0 0 s 0 0 0 0 0 0 0 SSW 0 0 0 0 0 0 0 SW 0 0 0 0 0 0 0 WSW 0 0 0 0 0 0 0 w 0 0 0 0 0 0 0 WNW 1 0 0 0 0 0 1 NW 0 0 0 0 0 0 0 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 1 0 0 0 0 0 1 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 Page 95 of 108

Clinton Power Station Period of Record: October - Decernber2021 Stability Class - Moderately Unstable - 60rn-10rn Delta-T (F)

Winds Measured at 60 Meters Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 0 0 0 0 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 0 6 0 0 0 6 SSE 0 0 4 0 0 0 4 s 0 0 0 0 0 0 0 SSW 0 0 0 0 0 0 0 SW 0 0 0 0 0 0 0 WSW 0 0 0 0 0 0 0 w 0 0 0 0 0 1 1 WNW 0 0 1 4 0 0 5 NW 0 0 3 2 3 0 8 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 0 14 6 3 1 24 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 Page 96 of 108

Clinton Power Station Period of Record: October - December2021 Stability Class - Slightly Unstable - 60m-10m Delta-T (F)

Winds Measured at 60 Meters Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 1 0 0 1 2 NNE 0 0 0 0 0 0 0 NE 0 0 4 1 0 0 5 ENE 0 0 1 0 0 0 1 E 0 3 1 1 0 0 5 ESE 0 0 1 0 0 0 1 SE 0 2 3 3 0 0 8 SSE 0 2 6 2 0 0 10 s 0 0 1 5 0 0 6 SSW 0 1 5 4 0 0 10 SW 0 0 4 3 0 0 7 WSW 0 0 0 1 0 0 1 w 0 0 0 1 4 1 6 WNW 0 0 4 5 2 6 17 NW 0 0 7 5 4 1 17 NNW 0 0 2 0 2 0 4 Variable 0 0 0 0 0 0 0 Total 0 8 40 31 12 9 100 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 Page 97 of 108

Clinton Power Station Period of Record: October - December2021 Stability Class - Neutral - 60m-10m Delta-T (F)

Winds Measured at 60 Meters Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 6 10 19 13 4 53 NNE 0 3 10 0 0 0 13 NE 1 4 14 6 0 0 25 ENE 0 3 15 4 0 0 22 E 1 6 11 22 6 0 46 ESE 0 8 17 11 7 0 43 SE 0 7 11 14 1 0 33 SSE 1 7 21 41 14 0 84 s 0 8 24 39 26 8 105 SSW 0 10 30 43 26 10 119 SW 0 6 23 16 8 0 53 WSW 0 8 9 12 8 3 40 w 0 7 12 11 25 10 65 WNW 0 3 20 19 28 17 87 NW 0 2 33 50 19 8 112 NNW 1 5 30 26 6 0 68 Variable 0 0 0 0 0 0 0 Total 5 93 290 333 187 60 968 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 Page 98 of 108

Clinton Power Station Period of Record: October - Decernber2021 Stability Class - Slightly Stable - 60m-10m Delta-T (F)

Winds Measured at 60 Meters Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 2 8 4 1 0 16 NNE 0 3 13 6 0 0 22 NE 0 2 15 8 3 0 28 ENE 0 3 12 7 1 0 23 E 2 5 11 18 1 0 37 ESE 0 2 12 33 5 0 52 SE 0 9 17 9 0 0 35 SSE 0 11 22 25 11 1 70 s 0 6 21 56 45 6 134 SSW 0 4 17 51 33 10 115 SW 1 3 7 33 23 2 69 WSW 1 4 6 10 9 0 30 w 0 4 8 25 0 0 37 WNW 1 1 21 40 6 0 69 NW 1 9 27 39 5 0 81 NNW 0 1 10 12 2 1 26 Variable 0 0 0 0 0 0 0 Total 7 69 227 376 145 20 844 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 Page 99 of 108

Clinton Power Station Period of Record: October - December2021 Stability Class - Moderately Stable - 60m-10m Delta-T (F)

Winds Measured at 60 Meters Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 1 6 0 1 0 8 NNE 0 1 5 1 0 0 7 NE 0 5 7 12 0 0 24 ENE 0 0 2 3 0 0 5 E 0 4 1 1 0 0 6 ESE 0 0 1 7 0 0 8 SE 0 5 5 0 0 0 10 SSE 0 0 2 12 0 0 14 s 0 3 4 8 1 0 16 SSW 0 0 14 10 0 0 24 SW 0 0 2 7 0 0 9 WSW 0 1 3 6 1 0 11 w 0 0 4 2 1 0 7 WNW 0 0 6 10 0 0 16 NW 0 3 11 3 0 0 17 NNW 0 3 4 2 0 0 9 Variable 0 0 0 0 0 0 0 Total 0 26 77 84 4 0 191 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 Page 100 of 108

Clinton Power Station Period of Record: October - December2021 Stability Class - Extremely Stable - 60m-10m Delta-T (F)

Winds Measured at 60 Meters Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 1 1 0 0 0 2 NNE 0 1 1 0 0 0 2 NE 1 1 3 0 0 0 5 ENE 0 1 4 2 0 0 7 E 0 0 3 1 0 0 4 ESE 0 0 3 0 0 0 3 SE 1 0 1 0 0 0 2 SSE 0 2 3 0 0 0 5 s 0 1 7 2 0 0 10 SSW 0 1 4 1 0 0 6 SW 0 1 3 4 0 0 8 WSW 0 2 4 2 0 0 8 w 0 2 5 3 0 0 10 WNW 0 1 3 0 0 0 4 NW 0 0 3 0 0 0 3 NNW 0 1 0 0 0 0 1 Variable 0 0 0 0 0 0 0 Total 2 15 48 15 0 0 80 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 Page 101 of 108

SECTION 8 ODCM OPERATIONAL REMEDIAL REQUIREMENT REPORT In accordance with CPS ODCM 3.1.1 Action G.1, 3.2.1 Action F.1, and 3.2.2 Action G.1; NON-FUNCTIONAL radioactive liquid and gaseous effluent monitoring instrumentation channels remaining in a NON-FUNCTIONAL condition for greater than the designated time shall be reported in the Annual Radioactive Effluent Release Report. During the course of 2021, there were zero (0) instances where a radioactive liquid or gaseous effluent monitoring instrumentation channel remained in a NON-FUNCTIONAL condition for greater than the designated clock requirement.

Throughout 2021, there was zero (0) instances of missed ODCM required samples and zero (0) instances of delayed ODCM required sampling.

Page 102 of 108

SECTION 9 CHANGES TO RADIOACTIVE WASTE TREATMENT SYSTEMS In accordance with Section 6.2 of the CPS ODCM, licensee-initiated changes to the liquid, gaseous or solid radioactive waste treatment systems shall be reported in the Annual Radioactive Effluent Release Report.

There were no permanent changes to the Radioactive Waste Treatment Systems during the course of the 2021 reporting period; therefore, there is no documentation required in the 2021 Annual Radioactive Effluent Release Report.

Page 103 of 108

SECTION 10 NEW LOCATIONS FOR DOSE CALCULATION AND/OR ENVIRONMENTAL MONITORING The following is a summary of the 2021 Annual Land Use Census. It shows changes in locations for dose calculations and/or environmental monitoring identified by the Annual Land Use Census . The distance of the receptor is being listed in the report in lieu of the name of the resident. This is being done to maintain and respect the privacy of the residents .

1.0 Nearest Residents TABLE 19 Nearest Residence The nearest residents identified in each of the sixteen (16) sectors are shown below .

2021 RESIDENT 2020 RESIDENT SECTOR AGEGROUP AGE GROUP (km) (km)

N 1.50 A 1.50 A NNE 1.50 A 1.50 A NE 2.07 A 2.07 A ENE 2.86 A 2.86 A E 1.67 A 1.67 A ESE 5.14 A 5 .14 A SE 4 .44

C/A

3.90

C/A

SSE 2.90 A 2.90 A s 4.78 A 4.78 A SSW 4.68 A 4.68 A SW 1.17 A 1.17 A WSW 3 .62 A 3 .62 A w 1.95 T/A 1.95 T/A WNW 2 .63 A 2.63 A NW 2.65 A 2.65 A NNW 2 .05 A 2.05 A

Indicates any change s from the previou s year (l)nfant (C)hild (T)een (A)dult Page 104 of 108

2.0 Broadleaf Garden Census Fifty- NINE (59) gardens within a five (5) kilometer radius were located in the sixteen (16) geographical sectors surrounding CPS. Thirteen (14) gardens contained broad leaf vegetation, wh ich were specifically identified for this report . Although other crops were identified within these areas, they are not addressed as part of this report .

The nearest gardens greater than fifty (SO) square-meters and producing broadleaf vegetation identified in each of the sixteen (16) geographical sectors are shown below .

TABLE 20 Nearest Broadleaf Garden 2021 GARDENS 2020 GARDENS SECTOR AGE GROUPS AGE GROUPS (km) (km)

N 1 .50 A 1.50 A NNE 4 .78

A* 1.50

A*

NE 3.46 A 3.46 A*

ENE 3 .45

A 4.22

A E 3 .95

A 1 .67 A ESE >8 >8

SE >8 >8 SSE 4.45 * >8 s >8 >8 SSW >8 >8 SW >8

A* 5 .61

A*

WSW 3 .66 A* 3.66

A*

w 3.22 * >8 WNW 2.63 * >8 NW 4.70 * >8

NNW 2 .05 A 2.05 A

Indic ates any chang es from the pr evious year (l)nfant (C)hild (T)een (A)dult Page 105 of 108

3.0 Milking Animal Census Milking animals within the sixteen (16) geographical sectors were located within five (5) miles surrounding CPS. These m ilking animals were either used for the nurs ing of the animal ' s offspring or used for meat production for the resident's own personal use and sold commercially . There were no residents that milked their animals for human consumption .

Milking animals were specifically identified for this report . Although other livestock were identified within these areas, they are not addressed as part of this report.

The nearest milk ing animals identified in each of the sixteen (16) geographical sectors are shown below .

TABLE 21 Nearest Milking Animal 2021 MILKING 2020 MILKING ANIMALS SECTOR AGE GROUPS AGE GROUPS ANIMALS (km) (km)

N 1.50 A 1 .50 A NNE >8 >8 NE >8 >8 ENE >8 >8 E >8 >8 ESE >8 >8 SE >8 >8 SSE >8 >8 s >8

A 6.60 A SSW >8 >8 SW >8 >8 WSW 4.32 A/T

4.32 A/T

w >8

A/T

3 .29

A/T

WNW >8 >8 NW >8 >8 NNW 2.05 A 2.05 A

Ind icates any changes fr om the p re vio us y ear (l)nfant (C)hild (T)een (A)dult Page 106 of 108

SECTION 11 CORRECTIONS TO DATA REPORTED IN PREVIOUS REPORTS There were no administrative changes identified in 2021 against previously submitted Annual Radioactive Effluent Release Reports resulting in an errata data submittal to the Commission .

Page 107 of 108

SECTION 12 CHANGES TO THE OFFSITE DOSE CALCULATION MANUAL The Offsite Dose Calculation Manual was last revised in December of 2015 . Revision 25 of the ODCM is not included with th is submittal since no updates were made in 2021.

Page 108 of 108

ML22123A177

Text

SUMMARY

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