U-604073, Submittal of 2011 Annual Radioactive Effluent Release Report

Submittal of 2011 Annual Radioactive Effluent Release Report

ML12128A190
Person / Time
Site:	Clinton
Issue date:	04/25/2012
From:	Noll W Exelon Generation Co, Exelon Nuclear
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
U-604073
Download: ML12128A190 (116)

Text

Exelkn.

Clinton Power Station Nuclear 8401 Power Road Clinton, IL 61727 U-604073 10CFR50.36a April 25, 2012 Document Control Desk Nuclear Regulatory Commission Washington, D.C. 20555-0001 Clinton Power Station Facility Operating License No. NPF-62 NRC Docket No. 50-461

Subject:

Clinton Power Station 2011 Annual Radioactive Effluent Release Report Exelon Generating Company, LLC (Exelon), Clinton Power Station, is submitting the 2011 Annual Radioactive Effluent Release Report. This report is submitted in accordance with Technical Specification requirement 5.6.3, "Radioactive Effluent Release Report," and covers the period from January 1, 2011 through December 31, 2011.

Questions on this letter may be directed to Mr. Tom Veitch, Chemistry Manager, at 217-937-3200.

There are no commitments contained in this letter.

Respec ull William G. Noll Site Vice President Clinton Power Station EET/blf Attachment cc: Regional Administrator, Region III NRC Senior Resident Inspector - Clinton Power Station Office of Nuclear Facility Safety- Illinois Emergency Management Agency

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I Exelkn.

Nuclear 01 January 2011 - 31 December 2011 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT CLINTON POWER STATION - DOCKET NUMBER 50-461 Prepared by:

I Clinton Power Station

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I TABLE OF CONTENTS SECTION TITLE PAGE 1 Executive Summary 5'.

2 Introduction 6 3 Supplemental Information 12 4 Radioactive Effluent Data -17 5 Solid Waste Disposal Information 28 6 Dose Measurements and Assessments . 32 7 Meteorological Data and Dispersion Estimates-. 43 8 ODCM Operational- Remedial RequirementRepQrts.:,, 103 9 Changes to.Radioactive:Waste Treatment- Systems, . 104 10 New Locations for Dose Calculation and / or Environmental 105 Monitoring 11 Corrections to Data Reported in-Previous Reports- 108 12 Changes to the Offsite Dose Calculation Manual - 115

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IY LIST OF TABLES TABLE TITLE PAGE NUMBER Gaseous Effluents - Summation of All Releases 17 1 0 1A Air Doses Due to Gaseous Releases 18

• 1 B Doses to a Member of the Public Due to Radioiodines, 18 Tritium 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 8 Maximum Offsite Doses and Dose Commitments to Members of the 3 Public In Each Sector Calculated Doses to, Members of the Public During Use of, the 9 Department of Natural Resources Recreation Area in the East- 36 Southeast Sector within the CPS Site Boundary 10 Calculated Doses to Members of the Public During Use of the Road 37 in the Southeast Sector within the CPS Site Boundary 11 Calculated Doses for the Residents in the South-Southeast Sector 38 within the CPS Site Boundary Calculated Doses for the Residents in the Southwest Sector within the CPS Site Boundary Calculated Doses to Members of the Public During Use of the 13 Agricultural Acreage in the South-Southwest Sector within the CPS 40 Site Boundary 14 Calculated Doses for the Residents in the West-Southwest Sector 41 within the CPS Site Boundary 15 Calculated Doses to Members of the Public During Use of Clinton 42 Lake in 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

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LIST OF FIGURES FIGURE TITLE PAGE NUMBER 1 CPS Airborne Effluent Release Points: 7 2 CPS Waterborne Effluents Release Pathway:: 8.

3 Effluent Exposure Pathways 11 4 Areas Within the CPS Site Boundary Open to Mqmbers of the 35 Public

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SECTION 1 EXECUTIVE

SUMMARY

The Annual Radioactive Effluent Release.Report 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 01 January 2011 through 31 December 2011. This report also-includes a detailed. meteorological section providing weather history of the surrounding area during this period. This information 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 th at 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]

and exceptions to the CPS effluent monitoring program that must be reported in accordance with ODCM Remedial Requirements 2.7.1.b and 3.9.2.b.

The Report also includes a summary of events that are to be included per ODCM Remedial Requirements.

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 As Low As Reasonably Achievable [ALARA]. To ensure compliance with this criterion, the NRC has established limitations governing the release of radioactivity in effluents.

During 2011, 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 2.92E-02 [or 0.0292] mrem. 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 was only a small fraction of the limit for the maximum exposed member of the public. There were no liquid effluent releases in 2011. As such, there was no dose received by the public from the liquid radioactive effluent pathway.

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'1 SECTION, 2

,INTRODUCTION CPS is located in Harp Township, DeWitt County approximately six (6) 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 27 February 1987.

Commercial operation commenced in' A*i 1987 and the reactor reached 100% power for the first.time on 15 September 1987.

CPS releases airborne effluents via two (2) gaseous effluent release points to the environment. They are the Common .Station, Heating, Ventilating, and Air Conditioning [HVAC]J Vent and the-Standby Gas'Treatinefit System [SGTS] Vent [see Figure 1]. Each gaseous effluent release p_0Jnt is-c0ntinuously monitored consisting of a surveillance program of periodic samplingand aalysis asspecified in the ODCM.

CPS is licensed to release radioactive fliqjuid effli4ets' in a batch mode, however there were- no,radioactive liquid. releases in 2011 at *CPS..,Ea6h release wob'uld have been sampled a ndanalyzed-prieorto release. Depending upori.the amount of activity in a release, liquid effluents,,,would'va ' from 10 to 300 gallonsl-per minute [GPM]. This volume is then 'further combihed, with both, Plant' Service,-WatIer. flow [a minimum of approximately 5,000 GPM] along with P.lant Circulating Water flow [0 to 567,000 GPM]

in the seal well, just prior to0 entering the 3.4 mie dischabge fiume into Lake Clinton

[see Figure 2]. .

Processing and Monitoring CPS strictly controls effluents t6'.-:iensure. Jr adio-activity released to the environment is maintained ALARA and does .-_ot exceed federal release limit:,,criteria.

Effluent controls include the operation of radiation monito~ring:.systems within the p!ant as well aS an offsite environmental ana~ysisprogram. .Jnriplant zradiation monitoring systems are used *to provide a-: continuous:3 indication of radioactivity in effluent streams. . Some areF also used to ,99clIect-,._particuIlate 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 for 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 envibronment 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.

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Figure 1 CPS AIRBORNE EFFLUENT RELEASE POINTS 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) 2 120 Release Point Diameter (feet). , 12*

Annual:Average Flow Rate (ft 3 /sec) 2,738 73 Vertical Exit Velocitv (feet/sec) '33 41

• Effective 2(A/li) 2 diameter

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Figure 2 CPS WATERBORNE EFFLUENTS RELEASE PATHWAY.

PLANT SERVICE WATER

.' J1 Jq. .,a ,=,

kAt Lt:Jb I DUW UrMI LIQUID RADWASTE DISCHARGE UNE (10-GO OR 60-300 GPm

. RADIATION MONITOR oHT FM*erxkoot *ssc Ir ISOLATION VALVE'

.0 COMPOSITE SAMPLER

• cGO*l ROW ,OAtO C0U.EWi3CkN WIMY 20 (W

, .FOR CNTONIS SEALWE~LL LAKE PLANT CIRCULATING - CLINTON WATER (0-567.000 GPM) 3.4 MILES

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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 characteristicspof the area that are defined by wind speed and wind direction. This information is used t6 evaluate how the radionuclides will be distributed within the surrounding area. Th'e 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 inhalatibn 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 ra.diation *exposures;consist of whole body exposure although specific organs can receive radiation exposure from distinct_ radionuclides. .These radionuclides eniter' the body '.through inhalation and ingestion and seekl`different organs depending on the -n'uclide. For example, radioactive iodine selectively concentrates'in the thyroid, radioactive cesium collects in muscle and liver tissue, and radioactive strontium in mineralized bone.

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 broadd 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.

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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 1-131, 1-133, H-3, C-14 and all radionuclides in particulate 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-85m , Xe-133 and Xe-135 - are the major contributors to external doses. Halogens 1-131 and 1-133, H-3, C-14 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) squrces at CPS. The first is effluent from the Radioactive Waste Treatment System.- -This.water is demineralized prior to release. 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 would be considered an abnormal release. As a matter of station management-commitme,6t, CPS strives to be a zero (0) radioactive liquid release plant. The last 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 NJR3C and the Depairtfnent of Transportation [DOT] have established limits on the types 6f radioactive waste"anhd the amount of radioactivity that.

may be packaged and shippedcbQoffsite.,forburial ,0ior; disposal. To ensure that CPS is complying, with these regufatiofns,:;the "types of waste and the radioactivity present are" reported to the NRC.

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FIGURE 3 EFFLUENT EXPOSURE PATHWAYS RELEASES DILUTED BY ATMOSPHERE I i AIRBORNE (ANIMALSMPLUME (MILK, MEAT EXPOSURE RELEASES CLINTON POWER STATION AND INHALATION CONSUMED

1. % LIQUID RELEASES t

CONSUME BY ANIMAL' PEOILE

• CO*NSUMED BY PEOPLE RELEASES DILUTED BY LAKE CONSUMED

% DRINKING 4 WATER FISH BY PEOPLE SHOREUNE

.- EXPOSUREA 4

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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 are kept ALARA. To ensure these criteria, are. met, each license authorizing nuclear reactor operation includes the Offsite Dose Calculation Manual [ODCM] governing the release of radioactive effluents. The ODCM designates` the limits for release of effluents, as well as the limits for doses to the general public from the release of radioactive liquidsand gases. These. limits are taken from Title 10 of the Code of Federal Regulations,. part 50, Appendix 1 (,0OFR5O Appendix I), Title 10 of the Code of Federal Regulations, Part 20.1301 (10CFR20.13,01) :and Section .5.5.1 of our Station's Technical Specifications.. . Maintaining effluent. releases within these operating limitations demonstrates compliance wit h, ALARA principles. These 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 [40CFR1910]. The EPA has established dose limits for members of the public in the vicinity of a nuclear power plant. Thesedose 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.

Specific.limit information is given below.,

A. Gaseous Effluents . ..

1. The maximum permissible concentrations 'for gaseous effluents shall not exceed the values provided within Section, 5.5.,4.g of Station 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. 1-131, 1-133, H73, C-14, and all radionuclides in particulate form with radioactive half-lives greater than eight (8) days:

Less:than o'r equal to 1,500 mrem/year to any organ.

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2. In accordance with Title 10"Of'the Code of Federal Regulations, Part 50, Appendix I, (10CFR50 Appendix I) air dose due to noble gases released in gaseous effluents to a'reas 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 cale'ndar quarter.

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

3. In accordancewith Title 10-of:the Code of Federal Regulations, Part 50, Appendix I, (10CFR50App'endix I), dose to a member of the: public (from I-131, 1-133,H-3, 'C- C-14'-ad all radionuclides in' particulate form with radioactive' half-lives greater :thah eight '(8) days) -in gaseous effluents released to areas at andbeyond the site boundary shall be limited to the following Values* ' .

a. Less than or equ:al to 7.5 `mrem to any organ, during any calernd'ar quarter."

b. -thLess tian or equal to 15.remoto 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 Technical Specifications for radionuclides other than dissolved or entrained noble gases. For dissolved 'or entrained noble gases, the concentration shall be limited to 2.OE-04 pCi/ml total activity.

2. The dose or dose commitmeht toairmember of the public from radioactive

-nmaterials in liquide*ffluentsreleabsed 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.

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 [E] for gaseous effluents as described in

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Regulatory Guide 1.21, "Measuring, Evaluating, andReporting Radioactivity in Solid..

Wastes and Releases of Radioactive Materials in Liquid and Gaseous Effluents from Light-Water-Cooled Nuclear Power Plants", are not applicable.

,, " * *\ ' ,. ' : , , ' "b"p

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II. 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 Electric Power Research Institute (EPRI) Technical Report 1021106, using the 2011 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 328.1 days.

B. lodines 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 average 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 average 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 H-3, gross alpha, Fe-55, Sr-89 and Sr-

90. An aliquot based on release volume is saved and added to composite containers.

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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.

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

ET =[(E 1)2 +(E) 2 +...(E) 2 ]

where: ET = total percent error, and EI...EN = percent error due .to -calibration standards,,

laboratory analysis, instruments, sample flow, etc.,

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SECTION 4

• RADIOACTIVE EFFLUENT DATA TABLE 1 GASEOUS EFFLUENTS - Summation Of All Releases Data Period: 0.1 January 2011 - 31 December 2011 Continuous Mixed Mode Units [ Quarter Quarter Quarter [ Quarter Est.

Total 1 2 3 4 Error, %

A. Fission & Activation Gases 1.

2.

Total Release Average release rate for period Ci pCi/se c:

• 1r.62E+00

-- 2.08E-01, O.OOE+01

,0.E+01 IO.OOE+01 O.OOE+01 5.18E+00 6.51 E-01 30

3. Percent of  %

ODCM Limit

• B. lodines

1. Total Iodine-131 Ci 9.84E-06 7.53E-06 2.46E-06 4.80E-06 31

2. roCi/se Average release rate for period c 1.27E-06 9.58E-07 3.10E-07 6.04E-07

3. Percent of  %

ODCM Limit C. Particulates

1. Particulates with Ci O.OOE+01 7.51E-06 1.02E-05 1.99E-04 half-lives >8 days C.E75 02 5 1 -4

2. Average release pCi/se rate for period c 0.00E+01 9.55E-07 1.28E-06 2.51E-05

3. Percent of ODCM Limit

4. Gross alpha Ci 3.37E-07 1.19E-07 radioactivity Ci_ 3.37E-07 1.1E-07 0.00E÷00 0.OOE+O0 D. Tritium

1. Total Release Ci 5.05E+00 4.79E+00 4.32E+00 2.26E+00 21 2.~ i/sAerag relase

2. Average release pCi/se rate for period c 6.50E-01 6.09E-01 5.44E-01 2.84E-01

3. Percent of ODCM Limit%

E. Carbon-14

1. Total Release Ci 3.98E+00 4.OOE+00 4.04E+00 2.96E+00

2. Average release pCi/se Rate for period c 5.12E_01 5.09E-01 5.08E-01 3.72E-01 Applicable limits are expressed in terms of dose. See Tables 1A and 1B of this report.

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TABLE 1A

.Air Doses Due to Gaseous Releases Doses per Quarter Type of ODCM lst  % of 2nd  % of *3 rd"  % of 4th %of Radiation Limit Quarter Limit' Quarter Limit Quarter Limit Quarter Limit.

Gamma 5 mrad 7.53E-05 1.51E-03'; :0.00E+01 0.00E+01 0.00E+01 0.00E+01 . 2.41E-04 4.82E-03 Beta 10 mrad 2.66E-05 2.66E-04 0.OOE+01 0.00E+01 0.00E+0! 0.OOE+01 8.50E-05 ..8.50E-04.

Doses per Year Type of . ODCM Year  % of Limit Radiation Limit Gamma 10 mrad 3.16E-04:.. 3.16E-03 ".

Beta 20.mrad 1.12E-04 5.58E-04:"

TABLEt lB.

Doses to'a Member of thei Public Due to Radioiodines, Tritium, Carbon-14,

-and Particulates in Gaseous Releases Doses per Quarter

Type of ODCM, Quarter  % of Quarter  % of- Quarter  % of Quarter-  % of Organ Limit 1 Limit 2 Limit . 3 - Limit 4 Limit Bone 7.5 mrem 7.76E-03 1.04E-01 7.80E-03 1.04E-01. 7.88E-03 1.05E-01 5.77E-03 7:70E-02 Liver 7.5 mrem 8.45E-05, 1.13E-03 8.00E-05 1.07E-03 .7..22E-05 9.62E-04 4.23E-05 5.64E-04 TBody 7.5 mrem" 1.62E-03 2.,17E-02 1:63E-03 2:18E-02 1.65E 2.20E-02 1.21E-03 1.61E-02 Thyroid 7.5 mrem 1.16E-04 1.55E-03 1.04E-041 1.39E-03* 8.02E-05 1.07E-03 5.33E-05 7.11E&04 Kidney 7.5 mrem 8.46E-05 .1.13E-03 8.01E-05,,i23E-105 1.07E-03 9.64E-04 3.81E-05 5.08E-04 Lung 7.5 mrem 845E-051 .13E-03 8.OOE-05 07E-03 7-:23E'05 - 9.64E-04 .3.96E-05 5.28E-04 GI LLI 7.5 mrem .8.45E 1.'13E-03 8.OOE-051: ":i.07E-03 .7..35E-05 9.80E-04 5.82E-05 7.76E-04 Doses per Year Type of ODCM Year  % of Organ Limit. . I Limit Bone 15 mrem 2.92E-02 1.95E-01' Liver 15 mrem 2.79E-0.4 1.86E-03 TBody 15omrem 6.11E-03 4.07E-02.

Thyroid 15 mrem 3.54E-04 2.36E-03 Kidney 15 mrem 2.75E-04 1.83E-03 Lung 15 mrem 2.76E-04 1.84E-03 GI LLI 15 mrem . 2.96E-04 1.97E-03 All dose calculations were performed using the methodology contained in the CPS ODCM, with the exception of'ddse due to :C-14, which was:calculated Using methodology included in the EPRI Technical Report:1021106.

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TABLE 2 CLINTON POWER STATION GASEOUS EFFLUENTS - Nuclides Released YEAR:2011 Mixed Mode Release X Elevated Release Continuous Mode , X Ground-Level Release, Batch-Mode Units Quarter Quarter Quarter Quarter 2[21 3[2) 4[2]

A. Fission Gases V1] [

Ar-41 Ci 1.62E+00 <LLD <LLD 5.18E+00 Kr-87 Ci <LLD <LLD <LLD <LLD Kr-88 Ci <LLD <LLD <LLD <LLD Xe-1 33 Ci 5LLD <LLD <LLD <LLD Xe-133m Ci <LLD.-. <LLD <LLD <LLD Xe-1 35 Ci <LLD <LLD .<LLD <LLD Xe-138 Ci <LLD <LLD <LLD <LLD Total for Period Ci 1.62E+00 <LLD <LLD 5.18E+00 B. lodines [0]

1-131 Ci 9.84E-06 7.53E-06 2.46E-06 4.80E-06 1-133 Ci <LLD <LLD <LLD <LLD 1-135 Ci <LLD <LLD <LLD <LLD Total for Period Ci 9.84E-06 7.53E-06 2.46E-06 4.80E-06 C. Particulates . ..

Cr-51 Ci <LLD 7.31E-06 <LLD 8.63E-05 Mn-54 Ci <LLD <LLD - <LLD 3.80E-05 Co-58 "Ci <LLD <LLD <LLD 1.46E-06 Fe-59 . ""Ci .. <LLD '<LLD <LLD 4.94E-05 Co-60 Ci <LLD <LLD <LLD i.43E-05 Zn-65 Ci <LLD <LLD <LLD <LLD Sr-89 Ci <LLD 11.96E-07 1.02E-05 9.69E-06 Mo-99 Ci, <LLD <LLD <LLD <LLD Cs-134 Ci <LLD:', <LLD <LLD <LLD Cs-1 37 Ci <LLD <LLD <LLD <LLD Ce-141 Ci <LLD .<LLD <LLD <LLD Ce-144 Ci <LLD <LLD <LLD <LLD Gross Alpha Ci 3.37E-07 1.19E-07 <LLD <LLD Total for Period Ci 3.37E-07 7.63E-06 1.02E-05 1.99E-04 D. Tritium (. .

' Total for Period Ci 5.05E+00 4.79E+00 4.32E+00 2.26E+00 E. Carbon-14 Or Total for Period Ci 3.98E+00 4.OOE+00 4.04E+00 2.96E+00

[1] Ten (10) times the values found in 10CFR20 Appendix B, Table 2, Column 1 are used for all Effluent Concentration Limit [ECL] calculations. For dissolved and entrained noble gases, the concentration is limited to 2.OOE-04 pCi/cc total activity.

[2] The, lower the value of the actual sample. activity - with respect to background activity - the greater the counting error.. Proportionally, large errors are reported for the various components of CPS gaseous effluents because of their consistent low sample activity.

ODCM required LLD values are listed in Table 6. All analyses met the required LLD's.

-- page 19 of 115 --

TABLE 3 RADIOACTIVE GASEOUS WASTE LLD VALUES TYPE OF ACTIVITY ODCM Required Lower Limit of Detection (LLD)

ANALYSIS .a(Rcilcc)

Principal Gamma Emitters,.

[Noble Gases] b,c .<1.00E-04 H-3 <i:.00E-06 1-131 d <1.OOE-12 1-133d *. . .1.00E-10 Prirncipal'Gamma Emitters,

[Particulates] b,e <1.00E-11 Sr-89, Sr-90f <1.00E-11 Gross Alpha f 1.00E-1 1 Table 3 Notations aThe Lower Limit of Detection (LLDI as defined for purposes of these specifications, 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 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:

4.6 6 LLD = E .-V -.2 .22 x 106.. ysb .*e.-'At

.... A

-- page 20 of 115 --

Table 3 Notations (continued)

Where:

LLD is-the "a priori" lower limit of detection as defined above, as pCi per unit mass'or volume, s6' is the standard deviation of the background counting rate or of the counting rate of ýa blank sample as appropriate, in counts per minute (cpm),'

E is the counting efficiency, in counts per disintegration, V is 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, kXis the radioactive decay constant.for the particular radionuclide (sec- 1 )

and At 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 aridot as an a posteriori(after the fact) limit for a particular measurement.

bThe principal gamma emitters for which the LLD specification applies include the following radionuclides: .Kr-87, Kr-88, Xe-133, Xe-133m, ,Xe-135,, and Xe-138 in noble gas releases and Mn-54,, Fe-59, Co,-58, Co-60, Zn-65, Mo-99, 1-131, Cs-134, Cs-137, 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.

Weekly grab sample and analysis dContinuous charcoal sample analyzed weekly e .

Continuous particulate sample analyzed weekly.

fComposite particulate sample analyzed monthly

-- page 21 of 115 --

TABLE 4Sf WATERBORNE EFFLUENTS - Summation Of All Releases Data Period: 01 January 2011 through 31 December 2011 There were zero (0) liquid radwaste releases from CPS in1201 1.

Units Quarter Quarter Quarter Quarter Total

-_-____ 1 2 1 3 4 Error, %

A. Fission & Activation Products ..... .... . . .

1. Total Release Ci O.OOE+01 0.0OE+01 O.OOE+01 O.OOE+01 N/A Average diluted

2. concentration during 4Ci/ml 0.OOE+01 0.00E+01 .00E+01 0.00E+01 period __

PercentofODCM N N/A

3. Limit _ _ _ _ _N/A_ _ .... __N/A__ ..... N/A N/A B . T ritium - " .. . . ... .. , ....

1. Total Release Ci 0.00.E+-0 0.00E+O1 .O.OOE+01 O.OOE+01 N/A Average diluted

2. concentration during pCi/ml 0.00E+01 0.00E+01 0.000E+01 0.OOE+01 period ...  : ....

. .% '*

• NA 3.Perct oDO gC M -.

P ercent of N/A N/A . N/A N/A Limit _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

C. Dissolved and Entrained Gases ........ __.......___.

1. Total Release Ci O.O0E+01 0.00E+OI1O.O(").00OE+01 0;00E+01 N/A Average diluted ,

2. concentration during pCi/ml 0.OOE+01-: 00E+01 '000E+01 -. 0.OOE+01 period _ _ _ _ ______ _ _ _ _ _ _ _ _ _ _ _____

Percent of ODCM, N/ N/A N/A N 3.Limit ____'_% ._N/A,_ N_/A_ _._____ N/A N/A D. Gross Alpha Radioactivity . ..... ...

I 1 1 0Eoo 1 radioactivity I IA E. Volume of Waste

_____________________I Released (prior to Liters 0OO+0 ~.

.OOE+01 0E1 0.00E+01_

0.OOE+01 I N/A

-Dilution)

F. Volume of dilution wateruseddurn eriod _Liters O.00E+01 000E+01 0OOE+01 O.OOE+01 N/A

-- page 22 of 115 --

TABLE 5 WATERBORNE EFFLUENTS .- Nuclides Released ]

Data Period: 01 January 2Q01 1L 31 December 2011 All Modes There were zero (0) liquid radwaste releases from CPS in 2011.

FContinuous Mode iBatch Mode X I-Nuclide Units-.1. QuarterI I Quarter 2 Quarter 3 Quarter4 A. Tritium H-3 Ci O..OOE+01 !O.OOE+01 I0.00E+01 0;0E.01 B. Fission and Activation Products . ...... . ,. ...

Sr-89 Ci 0.OOE+01 0.00E+01 0.OOE+01 0.00E+01 Sr-90 Ci . 0.OOE+01 0.OOE+01 0.OOE+01 0.OOE+01 Cs-134 Ci .0.OOE+01 0.0E+01.-. 0.OOE+01 0.OOE+01 Cs-137 Ci 0.00E+01 0.OOE+01 0.OOE+01 0.00E+01 1-131 Ci -0.00E+01, O.OOE+01 0.OOE+01 0.00E+01 Co-58 Ci 0OOE+01 0.OOE+01 0.00E+01 0.OOE+01 Co-60 Ci 0-.O0OE+01 0.-OOE+01 .0.00E+01 0.OOE+01 Fe-59 Ci 0.00E+01 "O.00E+01 0.00E+01 0.00E+01 Zn-65 Ci 0.OOE+01 0.OOE+01 0.00E+01 0.00E+01 Mn-54 Ci 0ý.00E+01!. , O.OOE+01. '0.OOE+01 0.00E+;01 Cr-51 Ci 0.OOE+01 0.00E+01 0.OOE+01 0.OOE+01 Zr/Nb-95 Ci 0.OE+01 , 0.OOE+01 0.OOE+01 0.OOE+01 Mo-99 Ci 0.0.OE+01 O.OOE+01 0.OOE+01 0.OOE+01 Tc-99m Ci "0.OOE+01 0.OOE+01 0.OOE+01 0.OOE+01 Ba/La-140 Ci 0.00E+01- 0.OOE+01 0.OOE+01 0.OOE+01 Ce-141 Ci 0.0'0E+01 0.OOE+01 O0.00Et01 0.OOE+01 Ce-144 Ci 0.00E+01 0.OOE+01i 0.OOE+01 0.OOE+01 Total Ci " "0.OE-.O1" 0.66E+01 O.OOE+01 O.OOE+01 C. Dissolved and Entrained Noble Gases .....

Xe-133, Ci 0.OOE+01 . 0.00E+01 [0.OOE-01 0.OOE+01 Xe-135 Ci 0.OOE+01 0.OOE+01 0.OOE+01 0.00E+01 Total I Ci I O'.. OOE+01 .I -O.OOE+O1 I O.OOE+O1 I O.OOE+O1 I El A value corresponding to ten times the-values found in 10CFR20 Appendix B, Table 2, Column 2 are U~sed for all Effluent Concentration Limit (ECL) calculations.

For dissolved and entrained noble gases, the concentration is limited to 2.OOE-04 pCi/ml total activity.

-- page 23 of 115 --

TABLE 6 RADIOACTIVE LIQUID WASTE LLD VALUES TYPE OF ACTIVITY ANALYSIS ODCM Required Lower Limit of Detection (LLD) a(pCi/mI)

Principal Gamma Emitters b <5.OOE-07 1-131 *'<1.00E-06 Dissolved and Entrained Gases (Gamma 1 1... E Emitters) c H-3 .- *ý1.0E-05&

Gross Alpha *1.00QE-07 Sr-89, Sr-90 <5.00E-08 Fe-55 <1.00E-06 Table 6 Notations, aThe Lower Limit of Detection' (LLD) as defined .for purposes of these specifications, as an "a priori" determination o'f. ..the..',smallest concentration of radioactive material in a sample that will yield.aanet, count above system background

- that will be detected with a 95% probability andwith only.a 5% probability of falsely concluding that a blank observation represents a "real" signal.

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

4.66 *sb LLD =

E - V *2.22 x 106 *Y *e-A*t Where:

LLD is the "a priori" lower limit of detection as defined above, as pCi 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 24 of 115 --

Table 6 Notations '(continued)

E is the counting efficiency, as counts per disintegration, V is the sample size in units of mass"b0 Volume, 2.22E+06 is the number of disintegrations per minute (dpm) per microcurie, Y is the fractional radiochemical yield, when applicable, k is the radioactive decay constant for the particular radionuclide (sec- 1 )

and At for plant 'effluents is the elapsed time between the midpoint of sample collection and the tim'e of. counting (sec).

Typical values-of E,;-V,Y, and Xt 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 foir-which' the LLD requirement applies include the following radionuclides: Mn 5 4 , Fe 5 9 , Co 58 , co 6 e, Zn65 , Mo 99

, Cs 134 , Cs 13 7

, Ce 1 4 1, and Ce144 shall also be measured, bubt'wiih an LLD ofC5.OE-06. This list does not mean that only ýthese nuclides are dete cted ýand -rePobrte'd. Other gamma peaks that are measurable - together with those of the above nuclides - shall als'o be'analyzed and reported in the Radioactive" EffluenrtRe'le~ase Rep*rt.

cDissolved and entrained gases are: Xe 1 33 , Xe 135 , Xe 13 8, Krsm, Kr8 7 and Kr8 8.

-- page 25 of 115 --

11 BATCH RELEASES There were zero (0.0) liquid radwaste releases from CPS in 2011.

A. Batch Liquid Releases: 2011

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 periodfor batch release N/A

6. Average stream flow during periods- of re~lease:. N/A

7. Total waste volume: N/A

8. Total dilution volume:,- N/A B. Batch Gaseous Releases: 2011

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

-- page 26of115--

ABNORMAL RELEASES Information concerning abnormal radioactive liquid and gaseous releases is presented below for the year 2011. There were no abnormal or unplanned liquid or gaseous releases from CPS in 2011.

Liquid Releases:

Number of Abnormal Liquid Releases: Zero (0)

Activity Released [Ci]

Nuclides .. Activity [Ci] .

N/A 0.0 N/A: 0.0 N/A 0.0 N/A 0.0 N/A 0.0 N/A 0.0 Total 0.0 Gaseous Releases:

Number of Abnormal Gaseous Releases: :Zero (0)

Activity Released [Ci]

Nuclides Activity [Ci].

N/A 0.0 N/A 0.0 N/A 0.0 N/A 0.0 N/A 0.0 N/A 0.0 Total 0.0

-- page 27 of 115 --

SECTION 5 SOLID WASTE DISPOSAL INFORMATION During this reporting period - 01 January 2011 through 31 December 2011 - there were Twenty Two (22) 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:

3 Class A Waste: 2.50E+04 ft 3 ./ Class B Waste: 0.0 ft 3 /Class C Waste: 0.0 ft This total includes Dry Active W aste,.(DAW),: resins,, filter sludges and evaporator bottoms.

2. Total curie quantity: Class A Waste was 358 curies and Class B Waste was 0.`0 curies (determined7 by dose-to-cuare and sample iodnentration methodology estimates) and Class C Waste was 0.0 curies in 2011.

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

4. Source of waste and processing employed':ý Resins',filter sludges and evaporator bottoms dewatered, non-compacted dry active waste, and Sealand bags.

5. Type of container: Type A and Strong Tight Container.

6. Solidification agent or absorbent: None *.'

-- page 28of115--

I Table 7 SOLID WASTE AND IRRADIATED FUEL SHIPMENTS A. Solid Waste Shipped Offsite for Burial or Disposal: [NOT irradiated fuel]

SA..I..Type of Waste .UnitsI January2011

- 'June July - 2011 December Est. Total Error, %

Spent r'esihs, filter ft3 " 1.38E+03 1.02E+03

a. sludges, evaporator 25 bottoms, etc. Ci 2.60E+02 1.OOE+02 Dry compactable W 9.20E+03 1.50E+04

b. waste, contaminated __ _ ___ 25 equipment, etc..., Ci j.-97E-01 , _:,._2.90E-01 Irradiated ft 0 0

c. components, control 25 rods, etc. . _ _Ci __

_ _ _ __-0 0 ""

ft3 IO-.O 1.00E-03

d. Other Wastes ________ 25~~

Ci 0.0 2.04E-04 Total curie quantity and principal radionuclides were determined by measurements.

A.2. Estimate of major nu'ciide'composition (by type of waste)

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

Waste Nuclide  % Percent i Class Name Abundance C I Mn-54 2.67 9.55E+00 Fe-55 82.89 2.96E+02 Co-60 13.24 4.73E+01 Zn-65 0.39 1.38E+00 Ni-63 0.69 2.45E+00 Other 0.13 4.58E-01

2. Dry compactable waste, contaminated equipment, etc.

Waste Nuclide  % Percent Class Name Abundance A Mn-54 16.80 7.34E-02 Fe-55 42.87 1.87E-01 Co-60 38.57 1.69E-01 Zn-65 0.74 3.21E-03 Ni-63 0.78 3.43E-03 Other 0.25 1.08E-03 Table 7

-- page29 of 115--

SOLID WASTE AND IRRADIATED FUEL SHIPMENTS [continued]

3. Other Wastes Waste Nuclide  % Percent Class Name Abundance u A 2.21 E-Mn-54 10.84 05 Fe-55 49.70 '1.01 04 Co-60 37.87 7.71E-05 1.22E-Zn-65 .0.60 06

-63 N-.Ni '- d.72 06 ' ...

., .06

' - ..... , -5 55E-Other 0.27 .55E-071.

-- page 30 of 115--

rf Table 7 SOLID WASTE AND IRRADIATED FUEL SHIPMENTS [continued]

A.3. Solid Waste Disposition January - June 2011 .. .. _*_.....

Number of Shipments Mode of Transportation Destination 1 Hittman Transport Barnwell Processing Facility 2 Hittman Transport Clive Disposal Facility Trnsor.. .. (Containerized) 9 Hittman Transport Duratek/Bear Creek July - December 2011 Number of Shipments Mode of Transportation Destination 6 Hittman Transport Duratek/Bear Creek 2 Hittman Transport Duratek/Gallaher Road Facility 1 Hittman Transport Barnwell Processing Facility 1 Hittman Transport Clive Disposal Facility (Containerized)

B. Irradiated Fuel Shipments (Disposition)

Number of Shipments I Mode of Transportation I Destination N/A N/A IN/AI

-- page 31 of 115--

SECTION 6 DOSE MEASUREMENTS ANDASSESSMENTS 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 49CFR190.

The 2011 maximum expected annual dose lfrom 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 328.1 days of equivalent full power operation.

The assumptions used in deterrfinhin'g dose v a's'efoI saluare's. llows:

• All receptors within a five -(5) mile -radius are-indluded -in the Annual Land Use

.Census. This Annual Census determines what dose pathways are present as-well as the'distance of each receptqr,from. the site.

• The annual average meteorological data for 20,11 was-,used in conjunction withthe 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', with the exception of dose due to C-14, which was calculated using. methodology includecdlin the-EPR[oTechnical Report 1021106.

• The occupancy factor was taken into. consideration .by calculating the dose to individuals using areas inside the Site. B1oundary in ;non-residential areas. The occupancy factor is determined-by dividing.the .number dofhour[s] of occupancy per year (taken from the ODCM)'and dividing that .vglue by the -total number of hour[s]

per year.

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

--. page 32 of 115--

I TABLE 8:

MAXIMUM OFFSITE DOSES AND DOSE'COMMITMENTS TO MEMBERS OF THE PUBLIC IN EACH SECTOR Data Period: 01 January 2011 31 December 2011 This table illustrates the dose that a member from the public would most likely be exposed to from radioactive effluents in each-sector from CPS. These values represent the maximum dose likely to expose a member of the public in each sector.

RECEPTOR INFORMATION,. AIRBORNE EFFLUENT DOSE WATERBORNE Iodine and Particulates. Noble Gases EFFLUENT DOSE (mrem) ' ... 6 (mrad) (mrem) [1]

Sector Distance Pathways 'Organ Age Organ" TotalTBody Gamma Beta Organ Total Body (miles)

N -. 0.9 GP, I, M, V, .B: A 2.92E-02:. .1-E-03 2.59E-04 9.12E-05 O.OOE+01 O.OOE+O1 NNE 2.3 GO, 1, M B A 1.386:02' 1,.82E-03 "1.65E-04 5.62E-05 NE 2.1 GP, I, V B A 4.11E-03 9.29E-04 1.20E-04 4.24E-05 ENE 1.8 GO, I, V 1.3'B C "5.90E-03 1.30E-03 9.78E-05 3.45E-05 E 2.5 GP, I, V B A 2.90E-03 6.56E-04 8.48E-05 2.99E-05 ESE' 3.3 GP, I, V B A 3.07E-03 6.94E-04 8.98E-05 3.17E-05 SE 4.4 GP, I, V B' C 3.32E-03 7.33E-04 5.51E-05 1.94E-05 SSE 2.8 GP, I,V B..

.. -A 2.29E-03 .5.18E-04 6.70E-05 2.36E-05 S 4.1 GP, I, V B A 2.02E-03 4.56E-04 5.89E-05 2.08E-05 SSW 2.9 GP, I B A 2.78E-04 7.47E-05 6.07E-05 2.14E-05 SW 3.6 GP, I, V ' .B ý"C' 4.421E-03 9.76E.-04 7.34E-05 2.59E-05 WSW 3.4 GIP, M B A , 4.81 E-03 9.85E-04 5.77E-05 2.04E-05 W 2.0 GP, I, V B C 3.30E-03 7.29E-04 5.47E-05 1.93E-05 WNW 1.6 GP, I, V B A 2.84E-03 6.42E-04 8.30E-05 2.93E-05 NW 1.6 GP, I B; A 4:43E-'04 :1.19E-04 9.68E-05 3.41E-05 NNW 1.3 I, M, V GP, lj,'

NNW 1.3JGP '" B A

'A 16-1:.67E 3..3 3.5OE1-03* .E 1.48E-04' 5.23E-05 Key for Table 8 GP = Ground Plane V = Vegetables A = Adult I = Inhalation B = Bone T = Teen M = Cows Meat I = Infant C = Child

[1] There were zero (0) liquid radwaste releases from CPS in 2011.

All doses were within all regulatory limits, including limits from 40CFR190.

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 33 of115 --

I COMPLIANCE WITH 40CFR190 REQUIREMENTS Thermoluminescent dosimeters [TLD], are stationed around CPS to measure the ambient gamma radiation field. Monitoring stations are placed near the site boundary 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 TLDs are reported in the Annual Radiological Environmental Monitoring Report [REMP]. The results from this effort indicated no excess dose to offsite areas.

Additionally, NUREG-0543, METHODS FOR DEMONSTRATING LWR COMPLIANCE WITH THE EPA URANIUM FUEL CYCLE STANDARD (40 CFR PART 190) states in section IV,. "As long as a nuclear, plant site operates at a level below. the Appendix I reporting requireme'nts,: no extra analysis is required to demonstrate compliance with 40 CFR Part 190." The organ and whole body doses reported in Table 8 are' determined using 10 CFR 50 Appendix I methodology. The doses reported are well below the limits of Appendix .1.

DOSE TOMEMBERS OF THE PUBLIC WITHIN THE SITE BOUNDARY CPS ODCM section 7.2. 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 3.4-4 (see Figure 4):

- The Department of NaturatlResources 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

- Agricultural acreage at 1.372 kilometers (0.9 miles) in the SSW sector

- A residence at 2.414 kilometers (1.5 1miles) 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. 2011 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 of115 --

FIGURE 4' AREAS WITHIN'THE CPS SITE BOUNDARY OPEN TO MEMBERS OF THE PUBLIC JkINTON Road 0.3 miles in SE Sector

• Agricultural acreage 0.9 miles in SSW Sector Clinton Lake 0.2 miles in the NW Sector Department of Natural Resources Recreation Area 0.8 miles in ESE Sector Residence 0.8 miles in SW Sector Residence 1.5 miles in WSW Sector Residence 1.7 miles in SSE Sector j

-- page 35 of 115--

I 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: 01 J.anuary 2011 -31 December 2011 DESCRIPTION DOSEt -  : UNITS Total Body Dose Rate (Noble mrem/year Gases) 5.96E-05 Skin Dose Rate (Noble Gases) 8.70E-05, mrem/year Gamma Air Dose- 6.21E-05. .-..mrad Beta Air Dose 2.19E-05 mrad Total Body Dose (Particulates) 8.17E-05 ,*m.rem Skin Dose (Particulates).[1] 1.01!E-05,mremn

[1] DOSEincludes thedose values resulting from.the release of iodines, pa~rticu!ates-(with half.lives >8 days)jtoitium, and carbon-14 in gaseous effluents.

Highest Organ Dose by Age Group,:

Adult Bone 2,910E-04 mrem

• NA [21 Teen Bone mrem Child Bone NA[2]1 *mrem Infant Bone NA [2) *mrem

[2] Dose calculated only for the age groups likely to be in the field.

-- page 36 of 115 --

I TABLE 10 CALCULATED DOSES TO MEMBERS OF THE PUBLIC DURING USE OF THE ROAD IN THE SOUTHEAST SECTORWITHIN THE CPS SITE BOUNDARY Data Period: 01 January 2011:- 31 December 2011

-'DESCRIPTION DOSE UNITS Total Body Dose.Rate (Noble mtrem/year Gases) 1.79E-05 Skin Dose Rate (Noble Gases) 2.61 E-05 'mremfyear Gamma Air Dose, 1.88E-05 mrad Beta Air Dose 6.63E-06 mrad Total Body Dose (.particulates) 3A.14E-05 mrem Skin Dose, (Particulates) 2'.76E-06 mrem J[1] DOSE in'cliJdes,.the dose -Values resulting fromnthe release of iodines, particulates (with hlalflive-s>8 :days)ý tritium, and carbon-14 in gaseous effluents.

Highest Organ Dose by Age Group:

Adult Bone 8.74E 'mrem Teen Bone A.24E-04 morem Child Bone 11.70E-04 mrem Infant Bone 1.26E-04 mrem

-- page 37of 115 --

I TABLE 11 CALCULATED DOSES FOR THE RESIDENTS IN THE SOUTH-SOUTHEASTSECTOR (2.736 kilometers) WITHIN THE CPS SITE BOUNDARY Data Period:. 01 January.2011 - 31 December 20.11 DESCRIPTION DOSE-:. ...

..... .... UNITS r

. -. - rem.....a Total Body Dose Rate (Noble mrem.year Gases) 9.01 E-05 Skin Dose Rate (Noble Gases) 1.32E-04 mrem/year Gamma Air Dose 9.48E-05,. ,.mrad Beta Airi Dose 3.34E-05 .mrad.

Total Body Dose (Particulates) . 1.2.2E-04; ' mrem Skin Dose :(Particulates) [1] 7.62E-06-;; mrem.

[1] DOSE includes the dose values resulting from the release of iodines, paprticulates (with half lives >8 days) tritium, and carbon-14 in gaseous effluents.

Highest Organ Dose by Age Group:.

Adult Bone 4.36E-04 mrem Teen Bone 6.52E-04, mrem Child Bone NA [2]. mrem Infant Bone NA[2],. ..mrem

[2] No receptors of this age at this location,

-- page 38 of 115 --

I TABLE-12 CALCULATED DOSES. FOR THE RESIDENTS IN THE SOUTHWEST SECTOR (1.219

- kilometers) WITHIN THE CPS SITE BOUNDARY Data Period: 01 January'2011 - 31 December 2011 DESCRIPTION DOSE UNITS Total Body Dose Rate (Noble mrem/year' Gases) 1.86E-04 Skin Dose Rate (Noble Gases) 2.72E-04 mrem/year Gamma Air Dose'-' ' 1.96E-04 mrad ,

Beta Air Dose 6.91 E-05 ý-mrad .

Total Body Dose (Particulates) 2.54E-04 mrem Skin Dose (Partid'luAtes)[1] 2.81E-05 'mrem

[1] DOSEinicludes the dose values resulting fromthe':release of iodines,

'particulates'(with half lives >8 days)1tritium,'and carbon-14 in gaseous effluents.

Highest Organ Dose by Age'Group:

Adult Bone 9`10E204 mrem Teen Bone 'N/A [2] .. mrem

[2]

Child Bone .N/A mrem Infant Bone N/A [2] mrem

[2] No receptors Of-this age at this location

-- page 39of115--

I 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: 01 January 2011 - 31 December 2011 DESCRIPTION DOSE,,S UNITS Total Body Dose Rate (Noble mrem/year Gases) .;47E-05 Skin Dose Rate (Noble Gases) 2.15E-05 mrem/year Gamma Air Dose 1.54E-05 mrad Beta Air Dose 5.44E-064 mrad Total Body Dose (Particulates) 2.03E-05. _mr.emr Skin Dose (Particulates) [1] 2.50E-06 mrem

[1] DOSE includes the dose values resultingfrom the release of iodines, particulates (with half lives >8 days) tritium, and carbon-14 in gaseous effluents.

Highest Organ Dose by Age GrouP:

Adult Bone 7.20E-05 mrem Teen Bone N/A [2] *..mrem Child Bone N/A [2] mrem Infant Bone N/A [2] mrem

[2] Dose calculated only for the age groups likely to be in the field.

-- page 40 of 115 --

t TABLE 14 CALCULATED DOSES FOR.THE RESIDENTS IN TH.E WEST-SOUTHWEST SECTOR WITHIN THE CPS SITE BOUNDARY Data Period: 01 January,2011 - 31 December 2011 DESCRIPTION- DOSE UNITS Total Body Dose Rate (Noble mrem/year Gases) 8.77E-05 Skin Dose Rate (Noble Gases) 1.28E-04 mrem/year Gamma Air Dose 9.22E-05 mrad Beta Air Dose 3.25E-05 mrad Total Body Dose (1ar~tfcu2lates) 1.15E-04 mrem Skin Dose (ParticuIates)'[.] '7.72E-06 mrem

[1] DOSE includes the dose values resulting from the release of iodines,"parti6u ates (vwith half lives >8 days) tritium, and carbon-14 in gaseous effluents."

Highest Organ Dose by Age Group:

Adult Bone 4.24E-04 mrem Teen Bone N*/A[ 2' mrem Child Bone N/A [2]

mrem Infant Bone N/A [2] mrem

[2] No receptors of this age at this location

-- page 41 of 115 --

TABLE 15 CALCULATED DOSES TO MEMBERS OF. THE PUBLIC DURIN.G ,USE OF CLINTON LAKE IN THE NORTHWEST SECTOR WITHIN THE CPS SITE BOUNDARY Data Period: 01 January 2011 - 31 December 2011 "T

DESCRIPTION DOSE UNITS Total Body Dose Rate (Noble .mrem/year:

Gases) 1.56E-04:`

Skin Dose Rate (Noble Gases) 2.28E-04 mrem/year Gamma Air Dose .. .1.63E-04' mrad

'Beta Air Dose '5:74E -'05 mr~ad Total Body Dose (Particulates) 2.03E-04 mrem Skin Dose (Particulates) [1] 1.38E-05 mrem

[1] DOSE includes the~dose values resultihdg from the release of."

iodines, particulates:(with half-]ives >8 days) tritium, and carbon-14 in gas.eous effluents..

Highest OrganDose by Age Group: "

Adult Bone T.49E-04 mrem Teen Bone N/A

".N/ [21. :mr~em.

mrem '.

Child Bone N/A[2] mrem2 Infant Bone N/A. [2] mrem,

[2] Dose calculated only for the age groups likely to be in the field.

-- page 42 of 115 --

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 direction 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 elevation are used for ambient temperature while the other half is used to provide a differential temperature between the 10-meter. and 60-meter levels.

Meteorological monitqring..instruments have been placed on the Clinton Power Station microwave tower at t66' 0-meter level to serve as 'a backup to the primary meteorological tower.

Clinton Power Stationh- meteorological data is tiransmitted to the Main Control Room [MCR] via a dedicated communication link. Once the signalsare received at the MCR, they are then converted to a 4 to 20 miiiiampp s&ignal and fed individually to a microprocessor and chart recordedrs. The microprocessor is part of the Clinton Power Station Radiation Monitoring 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 Gaussiana 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 information on meteorology and dispersion data.

-- page 43 of 115--

i TABLE 16 METEOROLOGICAL DATA AVAILABILITY Data Period: 01 January 2011 - 31 December 2011 PERCENT OF VALID PARAMETER HOURS PARAMETER Quarter 1 Quarter 2 Quarter 3 Quarter 4

1. Wind Speed

a. 10-Meter sensor 99.9% 99.9% 100.0% .99.7%

b. 60 Meter sensor. 99.9% . -99.9% 100.0% 99.7%

2. Wind Direction '_ " " _

a. 10-Meter sensor 99:9% 99.9%.- [ 100.0% 99.7%

b. 60 Metersensor j :999%

99.9% j .100.0% 99.7%

3. Temperature ,

a. 10-Meter sensor 99.9% 99.9% 100.0% 99.7%

b. 60 Meter sensor. .99.9% .. 99.9% .100.0% 99.7%

c. Temperature Difference (l0m-60m) 99.9% 99.9% 100.0% 99.7%

4. Percent of hours for which valid 10-meter Wind Speed, Wind Direction, and Delta Temperature were available 99.9% 99.9% 100.0% 99.7%

5. Percent of hours for which valid 60-meter Wind Speed, Wind Direction, and Delta Temperature were available 99.9% 99.9% 100.0% 99.7%

Clinton Power Station was able to achieve 99.9% Meteorological Recoverable Data during 2011 exceeding the minimum criteria of 90% as delineated within Regulatory Guide 1.23.

TABLE 17

-- page 44 of 115 --

A CLASSIFICATION OF ATMOSPHERIC STABILITY Stability Classification Pasquill Category Defining Conditions Extremely unstable- A - <AT < -1.042 Moderately unstable, B13 -1.042 <AT< -0.933 Slightly unstable C -0.933 <AT< -0.823 Neutral . D -0.823 <AT< -0.274 Slightly stable. E -0.274 <AT< 0.823.

Moderately stable .F 0.823 <AT< 2.195 Extremely.stable. ' .... G 2.195 <AT< -

AT = temperature'-difference in degrees Fahrenheit per 100 feet

-- page 45 of 115 --

TABLE 18 JOINT WIND FREQUENCY DISTRIBUTION BY STABILITY CLASS Reporting Period: 01 January 2011 through 31 December 2011 The following table contains the joint wind frequency tables for CPS. The tables are segregated by sensor elevation and calendar quarter. All tabled values are in hours.

TABLE 18 (continued)

-- page 46 of115 --

JOINT WIND FREQUENCY DISTRIBUTION BY STABILITY CLASS Clinton Power Station Period of Record: January - March 2011

,Stability Class - Extremely Unstable - 60m-10m Delta-T (F) winds Measured at IU Meters Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 4 NNE 0 3 NE 7 13 ENE 19 27 E 6 8 ESE 2 2 SE 3 3 SSE 1 2 S 3 5 SSW 4 7 SW 1 4 WSW 1 1 W 0 9 WNW 2 11 NW 0 3 NNW 0 0 Variable 0 0 Total 0 15 49 34 0 102 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

-- page47of115--

TABLE 18 (continued)

JOINT WIND FREQUENCY DISTRIBUTION BY STABILITY CLASS Clinton Power Station Period of Record: January - March 201 1 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

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW Variable Total 0 24 35 20 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: 3

-- page 48 of 115 --

TABLE 18 (continued)

JOINT WIND FREQUENCY DISTRIBUTION BY STABILITY CLASS Clinton Power Station Period of Record: Janua~ry- March 2011 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 8 NNE 0 10 NE 0 15 ENE 0 8 E 0 1 ESE 0 8 SE 0 5 SSE 0 8 S 0 2 SSW 0 13 SW 0 4 WSW 0 7 W 0 7 WNW 0 18 NW 0 10 NNW 0 7 Variable 0 0 Total 3 33 70 23 2 0 131 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3

-- page49 of 115--

4 TABLE 18 (continued)

JOINT WIND FREQUENCY DISTRIBUTION BY STABILITY CLASS Clinton Power Station Period of Record: January - March 2011 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 20 41 49 2 112 NNE 12 17 6 2 39 NE 26 54 37 8 128 ENE 14 50 9 0 74 E 14 17 0 0 32 ESE 28 22 1 0 54

.SE 15 34 1 0 50 SSE 15 57 3 0 77 S 13 46 8 2 71

• SSW 23 51 21 1 97 SW 10 31 1 0 47 WSW 20 13 7 2 45 W 26 20 20 0 70 WNW 21 54 58 4 138 NW 23 57 44 11 136 NNW 15 43 13 1 72 Variable 0 0 0 0 0 Total 25 295 607 278 33 4 1242 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 50 of 115 --

V TABLE 18 (continued)

JOINT WIND FREQUENCY DISTRIBUTION BY STABILITY CLASS Clinton Power Station Perlod'of Record: January - Match 2011 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 9 2 1 0 0 14 NNE 0 7 2 0 0 0 9 NE 0 11 11 0 0 0 22 ENE 2 16 1 0 0 0 19 E 1 14 3 0 0 0 18 ESE 3 12 4 0 0 0 19 SE 0 8 2 0 0 0 10 SSE 0 11 9 0 0 0 20 S 2 12 41 7 0 0 62 SSW 2 14 35 26 2 0 79 SW 2 14 31 13 1 0 61 WSW 0 9 17 7 1 0 34 W 1 12 29 13 4 0 59 WNW 1 18 36 1 2 0 58 NW 1 6 8 1 0 0 16 NNW 2 6 6 0 0 0 14 Variable 0 0 0 0 0 0 0 Total 19 179 237 69 10 0 514 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 115 --

TABLE 18 (continued),

JOINT WIND FREQUENCY DISTRIBUTION BY STABILITY CLASS Clinton Power Station Period of Record: January - March. 2011 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

NNE NE ENE

• E ESE SE SSE S

SSW SW WSW W

WNW NW NNW Variable Total 15 59 5 0 0 0 79 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 115 --

TABLE 18 (continued)

JOINT WIND FREQUENCY DISTRIBUTION BY STABILITY CLASS Clinton Power Station Period"of Record: January - Match 2011 Stability Class - Extremely Stable - 60m-10m Delta-T (F)

'Winds Measured at 10 Meters Wind Speed (in mph)

Wind Direction 1-3 4-7 12 13-18 19-24 > '24 Total N 1 0 2 NNE 0 0 2 NE 0 0 0 ENE 0 0 0 E 0 0 0 ESE 0 0 0 SE 0 0 0 SSE 0 0

.0 S 0 0 0

SSW 0 0 00 SW 0 0 WSW 0 0 0 W 0 0.0 0 WNW 0 0 1 NW 0 0 1 NNW 0 0 0 Variable 0 0 0

Total 1 6 Hours of calm in this stability class: 0 Hours of missing wind-measurements in this stability class: 0 Hours of missingstability measurements in all stability classes: 3

-- page 53 of115 --

TABLE .18 (continued)

JOINT WIND FREQUENCY DISTRIBUTION. BY STABILITY CLASS Clinton Power Station Period of Record: January - March 2011 Stability 'lass - 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 0 2 0 0 N 0 0 2 1 1 2 0 0 NNE 0 4 NE 0 1 2 4 0 0 7 ENE 0 2 7 14 7 0 30 E 0 0 6 4 0 0 10 ESE 0 0 0 4 0 0 4 SE 0 0 0 3 , 0 0 3 SSE 0 0 0 1 0 1 2 S 0 0 1 2 1 0 4 SSW 0 0 3 4 1 .0 8

,SW 0 1 1 2 0 0 4 WSW 0 0 0 1 0 .0 1 W 0 0 0 2 0 0 2 WNW 0 1 0 5 7 3 16 NW 0 1 1 3 0 0 5 NNW 0 0 0 0 0 .0 0 Variable 0 0 0 0 0 0 0 Total 0 7 22 53 16 4 102 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 stabil ity classes: 3

-- page 54 of 115 --

TABLE 18 (continued)

JOINT WIND FREQUENCY DISTRIBUTION BY STABILITY CLASS Clinton Power Station Period of Record: January - March 2011 Stability Class - Moderately Unstable - 60m-10m Delta-T (F)

Wind's Measured at 60 Meters Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 NNE 0 NE 1 ENE 0' E 1 ESE 0 SE 0 SSE 0 S 0 SSW 0 SW 1 WSW 1

',W 3

WNW 1

.NW 1 NNW 1 Variable 0 Total 0 10 25 27 16 5 83 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stabili ty class: 0 Hours of missing stability measurements in all stability classes: 3

--page 55 of 115 --

-4 TABLE 18 (continued)

JOINT WIND FREQUENCY DISTRIBUTION BY STABILITY CLASS Clinton Power Station Period of Record: January. - March. 2011 Stability Class - Slightly Unstable - 60m-10m.lDelta-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 2 .6 NNE S 1 10 NE 5 11 ENE 4 12 E

• 1 3 ESE 5 8 SE 3 6 SSE 2 8 S 1 1 SSW 5 11 SW 5 7 WSW 4 7 W 1 4 WNW 9 16 NW 5 13 NNW 2 8 Variable 0 0 Total 2 20 37 55 12 5 131 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3

-- page 56 of 115 --

TABLE 18 (continued)

JOINT WIND FREQUENCY DISTRIBUTION BY STABILITY CLASS Clinton Power Station Period of Record: January"- March 2011 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 9 35 40 35 121 NNE 6 22 6 9 48 NE 6 19 26 23 82 ENE 5 15 25 48 101 E 1 10 22 13 46 ESE 6 14 20 3 44 SE 9 15 31 10 65 SSE 4 18 33 9 65 S 8 23 39 11 85 SSW 8 18 31 8 70 SW 3 24 32 7 68 WSW 6 27 7 2 47 W 15 22 6 12 58 WNW 13 26 29 35 107 NW 14 32 49 45 148 NNW 7 32 27 15 87 Variable 0 0 0 0 0 Total 12 120 352 423 285 50 1242 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 57 of 115 --

TABLE 18 (continued)

JOINT WIND FREQUENCY DISTRIBUTION BY STABILITY CLASS Clinton Power Station Period of Record: January - March 2011 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 5 5 1 0 15 NNE 7 1 0 0 9 NE 2 13 1 0 17 ENE 7 11 0 0 18 E 6 9 2 0 18 ESE 3 16 1 0 22 SE 1 8 0 0 12 SSE 6 12 0 0 21 S 2 21 22 0 45 SSW 5 22 17 15 59 SW 9 31 29 2 74 WSW 6 29 11 3 50 W 9 13 13 5 40 WNW 12 33 12 4 61 NW 16 18 1 1 36 NNW 10 5 0 .0 17 Variable 0 0 0 0 0 Total 1 20 106 247 110 30 514 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 58 of 115 --

TABLE 18 (continued)

JOINT WIND FREQUENCY DISTRIBUTION BY STABILITY CLASS Clinton Power Station Period of Record: January - March 2011 Stability Class - Moderately Stable - 60m-10m Delta-T (F)

Winds Measured at 60 Meters Wind Speed (in mph)

Wind Direction 13 4-7 8-12 13-18 19-24 > 24 Total N 0 1 3 NNE 0 2 5 NE 0 4 8 ENE 0 0 6 E 0 1 3 ESE 1 0 3 SE 0 0 3 SSE 1 0 3 S 0 0 0 SSW 0 0 6 SW 0 0 4 WSW 0 0 4 W 0 0 4 WNW 0 0 6 NW 0 0 10 NNW 0 2 11 Variable 0 0 0 Total 2 10 37 28 2 0 79 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 cl asses: 3

-- page 59 of115 --.

TABLE 18 (continued)

JOINT WIND FREQUENCY DISTRIBUTION BY STABILITY CLASS Clinton Power Station Period of Record: January - March 2011 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 NNE 0 NE 2 ENE 0 E 0 ESE 0 SE 0 SSE 0 S 0 SSW 0 SW 0 WSW 0 W 1 WNW 0 NW 0 NNW 1 Variable 0 Total 0 2 4 0 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: 3

-- page 60 of 115 --

TABLE 18 (continued)

JOINT WIND FREQUENCY DISTRIBUTION BY STABILITY CLASS Clinton Power Station:

Period of Record: April - June 2011 Stability Class - Extremely Unstable - 60m-10m Delta-T (F)

Winds Measured at 10 Meters Win-d Speed (in mph)

Wind Direction 1-3 4-7 8-12 '13-18 19-24 > 24 Total N 4 22 NNE 9 21 NE 3 14 ENE 0 2 E 0 10 ESE 0 11 SE 0 6 SSE 1 6 S 2 9 SSW 2 5 SW 3 4 WSW 3 7 W 3 17 WNW 15 25 NW 3 11 NNW 0 2 Variable 0 0 Total 0 31 88 48 5 0 172 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 61 of 115 --

TABLE 18 (continued)

JOINT WIND FREQUENCY DISTRIBUTION BY STABILITY CLASS Clinton Power Station Period.of Record: April- June 2011 Stability Class - Moderately Unstable - .60m-10,m 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 2 0 0 0 N 0 2 4 2 1 0 0 NNE 0 5 8 NE 0 3 4 1" 0 0 8 ENE 0 1 1 0. 0 0 2 E 0 2 2 0 0 0 4 ESE 0 3 3 0 0 0 6 SE 0 5 1 0: 0 0 6 SSE 0 2 0 0 2 0 4 S 1 5 4 4 0 0 14 SSW 1 0 3 5 1 2 12 SW 0 0 2 4 2 0 8 WSW 0 1 4 3 1 0 9 W 0 0 5 2 2 0 9 WNW 2 3 7 1 1 0 14 NW 0 1 0 2 0 0 3 NNW 0 4 1 0 0 .0 5 Variable 0 0 0 0 0 0 0 Total 4 37 41 23 9 2 116 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stabi~ity class: 0 Hours of missing stability measurements in. all stability classes: 3

-- page 62 of 115 -6

TABLE 18 (continued)

JOINT WIND FREQUENCYDISTRIBUTION BY STABILITY CLASS Clinton Power Station Period of Record: April -June 2011 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 1 3 4 NNE 8 2 10 NE 2 5 8 ENE 3 3 6 E 2 1 3 ESE 6 0 7 SE 4 5 9 SSE 3 2 7 S 7 8 22 SSW 3 8 16 SW 3 13 17 WSW 1 7 16 W " 1 4 14 WNW 1 12 17 NW . 3 1 6 NNW 2 1 3 Variable 0 0 0 Total 5 50 75 24 11 0 165 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 63 of 115 --

a.

TABLE 18 (continued).

JOINTMWIND FREQUENCY DISTRIBUTION BY STABILITYCLASS Clinton Power Station Period of Record: April - June 2011 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 1 22 28 10 0 0 61 NNE 2 13 19 26 0 0 60 NE 2 19 32 12 0 0 65 ENE 1 22 19 6 1 0 49 E 5 23 18 12 0 0 58 ESE 3 24 19 5 0 0 51 SE 3 29 27 3 0 0 62 SSE 8 26 26 11 0 0 71 S 7 18 32 9 1 0 67 SSW 0 13 35 24 11 1 84 SW 2 20 41 16 0 0 79 WSW 4 15 25 15 3 0 62 W 2 4 15 8 1 0 30 WNW 2 4 20 17 9 0 52 NW 1 12 20 17 3 0 53 NNW 1 15 23 3 0 0 42 Variable 0 0 0 0 0 0 0 Total 44 279 399 194 29 1 946 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 64 of 115 --

TABLE 18 (continued)

JOINT WIND FREQUENCY DISTRIBUTION-BY STABILITY CLASS Clinton Power Station

-Peridd of Record: April - June 2011 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 7 17 NNE 14 7 26 NE 17 11 36 ENE 15 6 25 E 14 4 24 ESE 29 8 42 SE 38 10 52 SSE 30 19 57 S 30 41 79 SSW 34 36 93 SW 15 22 44 WSW 14 18 35 W 11 8 28 WNW 8 12 26 NW 9 5 16 NNW 15 3 19 Variable 0 0 0 Total 54 303 217 33 11 1 619 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 65of115 --

1, TABLE 18 (continued)

JOINT WIND FREQUENCY DISTRIBUTION BY STABILITY CLASS Clinton Power Station Period of Record: April - June . 2011 Stability Class - Moderately Stable .- 60m-i0m 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 1 0 --0 0 0 1 N 0 1 0 0 0 NNE 2 6 9 1 0 0 0 NE 4 2 7 0 0 0 0 ENE 3 6 9 0 0 0 0 E 2 3 5 0 0 0 0 ESE 4 3 7 0 0 0 0 SE 4 1 5 0 0 0 0 SSE 1 8 9 0 0 0 0 S 2 2 4 0 0: 0 0 SSW 2 3 5 SW 2 4 1 0 0 0 7 WSW 2 7 2 0 0 0 11 W 6 4 3 0 0 .0 13 WNW 4 4 4 0 0 ,0 12 NW 5 4 0 0 0 0 9 NNW 1 2 0 0 0 ,0 3 Variable 0 0 0 0 0 .0 0 Total 45 59 12 0 0 0 116 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 cl asses: 3

-- page 66 of 115 --

i.

TABLE 18 (continued)

JOINT WIND-FREQUENCY DISTRIBUTION BY STABILITY CLASS Clinton Power Station Period of Record: April- June 2011 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 0 0 0 0 N 0 0 0 0 0 0 0 NNE 3 0 3 0 0 0 0 NE 3 3 6 0 0 0 0 ENE 4 2 6 0 0 0 0 E 4 2 6 0 0 0 0 ESE 3 1 4 0 0 0 0 SE 0 0 0 0 0 0 0 SSE 2 0 2 0 0 0 0 S 2 0 2 0 0 0 0 SSW 0 0 0 0 0 0 0 SW 1 0 1 0 0 0 0 WSW 0 0 0 0 0 0 0 W 7 0 7 0 0 0 0 WNW 6 1 7 0 0 0 0 NW 2 0 2

0. 0 0 0 NNW 1 0 1 0 0 0 0 Variable 0 0 0 Total 38 9 0 0 0 0 47 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 cl asses: 3

-- page 67 of 115 --

TABLE 18 (continued)

JOINT WIND.FREQUENCY DISTRIBUTION BY STABILITY CLASS Clinton Power Station Period of Record: April - June 2011 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 8 8 0 0 16

.NNE 0 2 5 10 3 0 20 NE 0 1 4 5 6 0 16 ENE 0 1 1 3: 0 0 5 E 0 1 2 7 0 0 10 ESE 0 0 4 8 1 0 13 SE 0 0 6 0 0 0 6 SSE 0 4 0 1 0 1 6 S 0 1 4 2 1 0 8 SSW 0 0 1 1 2 2 6 SW 0 0 0 2 1 0 3 WSW 0 0 2 3 2 0 7 W 0 0 7 7 1 0 15 WNW 0 0 4 13 6 2 25 NW 0 1 2 2 6 1 12 NNW 0 0 4 0 0 0 4 Variable 0 0 0 0 0 0 0 Total 0 11 54 72 29 6 172 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 68 of 115 --

TABLE 18 (continued)

JOINT WIND FREQUENCY DISTRIBUTION BY STABILITY CLASS Clinton Power Station Period of Record: April -. June 2011 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 1 3 1 0 0 N 0 5 4 1 0 0 NNE 0 0 5 NE 0 2 2 2 0 0 6 ENE 0 0 4 1 1 0 6 E 0 0 1 2 1 0 4 ESE 0 0 2 3 0 0 5 SE 0 3 4 1 0 0 8 SSE 0 3 0 0 0 2 5 S 0 3 6 1 4 0 14 SSW 0 0 1 4 1 4 10 SW 0 0 2 2 3 2 9 WSW 0 0 1 4 2 1 8 W 0 0 3 2 3 1 9 WNW 0 1 3 6 1 1 12 NW 0 3 1 1 0 0 5 NNW 0 2 2 1 0 0 5 Variable 0 0 0 0 0 0 0 Total 0 18 39 32 16 11 116 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 69 of115 --

TABLE 18 (continued)-

JOINT WIND FREQUENCY DISTRIBUTION BY STABILITY CLASS Clinton Power Station Period of Record: April - June . 2011 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 0 4 NNE 1

• 0 NE 3 S 1 0 7 ENE 1 0 0 6 E 3 1 0 6 ESE 0 0 0 5 SE 5 0 0 13 SSE 1 1 0 4 S 6 2 4 23 SSW 3 2 2 15 SW 4 0 0 12 WSW 7 6 2 20 W 7 5 2 15 WNW 9 0 2 15 NW 5 1 0 8 NNW 0 0 .0 3 Variable 0 0 0 Total 4 31 44 55 19 12 165 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 70 of 115 --

TABLE 18 (continued)

JOINT wIND FREQUENCY DISTRIBUTION BY STABILITY CLASS Clinton Power Station Period of Record: April - June 2011 StabilityClass - Neutral - 60m-10m Delta-T (F)

I Winds Measured at 60 Meters I Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 11 20 27 5 0 63 NNE 6 12 15 24 2 59 NE 1 9 12 3 4 30 ENE 6 12 28 14 11 72 E 7 14 20 15 12 68 ESE 5 12 17 9 5 49 SE 7 22 25 16 0 72 SSE 3 25 21 10 6 70 S 8 17 21 17 5 72 SSW 4 9 24 18 20 76 SW 9 7 36 13 0 66 WSW 8 16 26 15 3 70 W 4 11 16 5 0 36 WNW 1 2 15 10 10 39 NW 3 14 21 22 5 65 NNW 4 14 17 3 1 39 Variable 0 0 0 0 0 0 Total 19 87 216 341 199 84 946 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 71 of 115 --

TABLE 1.8 (continued)

JOINT WIND FREQUENCY DISTRIBUTION BY STABILITY CLASS Clinton Power Station Period of Record: April - June 2011 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 7 7 0 17 NNE 7 12 4 0 24 NE 9 10 10 0 31 ENE 8 12 1 0 23 E 9 11 3 0 27 ESE 9 20 2 0 35 SE 26 19 1 0 51 SSE 24 23 13 2 65 S 14 32 26 1 76 SSW 6 46 16 12 85 SW 16 25 2 2 48 WSW 13 15 0 .0 33 W 12 16 6 1 39 WNW 4 17 4 0 29 NW 9 8 2 .0 21 NNW 8 4 1 0 15 Variable 0 0 0 0 0 Total 3 48 181 277 91 19 619 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

• --page72 of115 --

TABLE 18 (continued)

JOINT WIND FREQUENCY DISTRIBUTION BY STABILITY CLASS Clinton Power Station Period of Record: April - June 2011 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 3 NNE 5 NE 5 ENE 8 E 8 ESE 5 SE 8 SSE 4 S 12 SSW 4 SW 6 WSW 15 W 5 WNW 18 NW 5 NNW 5 Variable 0 Total 9 24 45 30 8 0 116 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 73 of115 --

TABLE 18 (continued)

JOINT WIND FREQUENCY DISTRIBUTION BY STABILITY CLASS Clinton Power Station Period of Record: April - June 2011 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 NNE 0 NE 0 ENE 0 E 0 ESE 0 SE 0

$SSE 0 S 0 SSW 0 SW 0 WSW 0 W 0 WNW 0 NW 0 NNW 0 Variable 0 Total 7 18 17 4 0 0 46 Hours of calm in this stability class: 1 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3

-- page 74 of 115 --

TABLE 18 (continued)

JOINT WIND FREQUENCY DISTRIBUTION BY STABILITY CLASS Clinton Power'Station Period of Record: 'July - September 2011 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 18 28 11 57 NNE 8 17 17 42 NE 11 4 3 18 ENE 6 3 0 10 E 1 0 0 1 ESE 3 0 0 3 SE 19 0 0 19 SSE 15 2 0 17 S 14 11 0 25 SSW 10 17 0 27 SW 11 19 2 32 WSW 8 21 1 31 W 9 17 5 31 WNW 7 10 1 18 NW 14 9 0 23 NNW 17 8 5 30 Variable 0 0 0 0 Total 2 - 171 166 45 0 384 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 115 --

TABLE 18 (continued)

JOINTWIND FREQUENCY DISTRIBUTION BY STABILITY CLASS Clinton Power Station Period.of Record: July - September 2011 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 5 0 14 NNE 5 0 11 NE 8 0 11 ENE 4 0 9 E 5 0 7 ESE 6 0 6 SE 11 0 15 SSE 6 0 9 S 6 0 9 SSW 7 0 18 SW 5 0 13 WSW 6 0 10 W 5 0 7 WNW 3 .0 6 NW 5 0 9 NNW 2 0 7 Variable 0 0 0 Total 14 89 52 6 0 0 161 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0

-- page 76 of 115 --

TABLE 18 (continued).

JOINT WIND FREQUENCY DISTRIBUTION BY STABILITY CLASS Clinton Power-Station Period of Record: July - September 2011 Stability( Cl'a'ss -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 3 4 1 0 0 8 NNE 0 4 1 2 0 0 7 NE 2 13 0 0 0 0 15 ENE 2 4 1 0 0 0 7 E 0 5 0 0 0 0 5 ESE 3 9 0 0 0 0 12 SE 1 6 0 0 0 0 7 SSE 1 7 0 0 0 0 8 S 2 7 3 0 0 0 12 SSW 2 4 5 0 0 0 11 SW 0 4 4 0 0 0 8 0 3 5 1 0 0 WSW 9 W 0 4 3 0 0 0 7 WNW 0 3 0 1 0 0 4 NW 0 11 1 0 0 0 12 NNW 0 2 1 0 0 0 3 Variable 0 0 0 0 0 0 0 Total 13 89 28 5 0 0 135 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stabili ty class: 0 Hours of missing stability'measurements in all stability cl asses: 0

-- page 77 of 115 --

TABLE 18 (continued)

JOINT WIND FREQUENCY DISTRIBUTION BY STABILITY CLASS Clinton Power Station Period of Record: July - September 2011 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 14 25. 43 NNE 1 12 10 27 NE 2 15 6 23 ENE 3 22 2 27 E 4 12 1 17 ESE 10 19 0. 29 SE 6 16 8 30 SSE 5 18 13 37 S 4 15 9 28 SSW 0 12 17 34 SW 1 23 14 39 WSW 1 11 14 27 W 2 9 10 24 WNW 1 10 7 22 NW 2 14 16 38 NNW 0 11 10 22 Variable 0 0 0 0 Total 44 233 162 26 - 2 0 467 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 cl asses: 0

-- page 78 of115 --

TABLE 18 (continued)

JOINT WIND FREQUENCY DISTRIBUTION BY STABILITY CLASS Clinton Power Station Period of Record: July - September 2011 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 1 19 19 39 NNE 2 26 21 49 NE 14 33 3 50 ENE 14 19 1 34 E 11 12 0 23 ESE 21 23 0 44 SE 15 21 0 36 SSE 11 28 1 40 S 2 38 6 46 SSW 8 51 37 98 SW 6 38 22 66 WSW 6 7 9 22 W 8 14 1 24 WNW 7 28 5 41 NW 2 22 9 33 NNW 4 20 3 27 Variable 0 0 0 0 Total 132 399 137 0 672 Hours of calm in this stability class: 1 Hours of missing wind measurements in this stability class: 0 Hours ofmissing stability measurements in all stability classes: 0

-- page 79of115 --

TABLE 18 (continued)

JOINT WIND FREQUENCY DISTRIBUTION BY STABILITY CLASS Clinton Power Station Period of Record: July - September.2011 Stability Class -- Moderately Stable . - 60m-10m Delta-T (F)

Winds Measured at 1.0 Meters

.Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 6 14 NNE 19 31 NE 26 45 ENE 3 13 E 0 11 ESE 3 10 SE 2 4 SSE 8 10 S 0 5 SSW 17 23 SW 10 17 WSW 7 11 W 3 11 WNW 6 17 NW 8 16 NNW 1 4 Variable 0 0 Total 121 119 2 0 0 0 242 Hours of calm in this stability class: 2 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0

-- page 80 of 115 --

TABLE 18 (continued)

JOINT WIND FREQUENCY DISTRIBUTION BY STABILITY CLASS Clinton Power Station Period of Record: July - September 2011 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 0 0 0 0 N 10 0 10 0 0 0 0 NNE 23 2 25 0 0 0 0 NE 40 16 56 0 0 0 0 ENE 9 4 13 0 0 0 0 E 1 0 1 0 0 0 0 ESE 0 1 1 0 0 0 0 SE 0 0 0 0 0 0 0 SSE 2 0 2 0 0 0 0 S 0 0 0 0 0 0 0 SSW 1 1 2 0 0 0 0 SW 2 3 5 0 0 0 0 WSW 5 0 5 0 0 0 0 W 3 2 5 0 0 0 0 wNw 3 1 4 0 0 0 0 NW 5 3 8 0 0 0 0 NNW 4 0 4 0 0 0 0 Variable 1 0 1 Total 109 33 0 0 0 0 142 Hours of calm in this stability class: 2 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes': 0

-- page 81 of 115 --

TABLE 18 ,(continued)

JOINT WIND FREQUENCY DISTRIBUTION BY STABILITY CLASS Clinton Power Station Period of Record: July -- September 2011 Stability Class - Extremely Unstable - 60m-lOm.De.lt-a-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 8 24 18 10 0 60 NNE 0 2 7 13 15 0 37 NE 0 9 10 6 6 0 31 ENE 0 8 1 2 0 0 11 E 0 0 0 0 0 0 0 ESE 0 2 3 0 0 0 5 SE 0 10 6 0 0 0 16 SSE 0 10 3 0 0 0 13 S 0 11 12 7 0 0 30 SSW 0 5 14 7 0 0 26 SW 0 3 16 11 1 0 31 WSW 0 4 13 12 0 0 29 W 0 5 15 13 0 0 33 WNW 0 1 13 5 1 0 20 NW 0 6 8 2 0 0 16 NNW 0 8 11 5 2 0 26 Variable 0 0 0 0 0 0 0 Total 0 92 156 101 35 0 384 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 115 --

TABLE 18 (continued)

JOINT WIND FREQUENCY DISTRIBUTION BY STABILITY CLASS Clinton Power Station Period of Record: July - September 2011 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 10 NNE 10 NE 12 ENE 10 8

ESE 8

-SE 13 SSE 12 S 7 SSW 18 SW 11 WSW 10 W 7 WNW 5 NW 12 NNW 8 Variable 0 Total 3 70 57 25 5 1 161 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0

-- page 83 of115 --

TABLE 18 (cqntinued):

JOINT.WIND FREQUENCY DISTRIBUTION BY STABILITY CLASS.

Clinton Power Station Period of Record: July - September. 2011 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 2 0 6 NNE 3 0 9 NE 4 0 8 ENE 6 0 11 E 5 0 6 ESE 9 0 13 SE 5 0 9 SSE 5 0 7 S 1 0 12 SSW 2 0 9 SW 4 0 9 WSW 2 0 9 W 0 0 5 WNW 2 .0 5 NW 12 0 14 NNW 1 0 3 Variable 0 0 0 Total 5 63 . 47 15 5 0 135 Hours of calm in this stability class: 0.

Hours of missing wind measurements in this sta bi.lity class: 0 Hours of missing stability measurements in all stability cl asses: 0

-- page 84 of115 --

TABLE 18 (continued)

JOINT WIND FREQUENCY DISTRIBUTION BY-STABILITY CLASS Clinton Power Station Period bf Record: July.- September 2011 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 10 22 35 NNE 3 8 10 23 NE 9 9 6 28 ENE 9 7 6 23 E 4 14 6 27 ESE 10 10 3 25 SE 10 12 6 31 SSE 10 15 10 41 S 4 9 13 28 SSW 1 15 9 32 SW 7 18 6 36 WSW 5 13 12 31 W 4 4 7 18 WNW 4 11 6 28 NW 2 14 12 32 NNW 4 12 7 29 Variable 0 0 0 0 Total 19 87 181 141 33 6 467 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 of115 --

TABLE 18 (continued)

JOINT WIND FREQUENCY DISTRIBUTION-BY STABILITY CLASS Clinton Power Station Period of Record: July.- September,.2011 Stability Class - Slightly Stable. - 60m-l10m 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 12 31 2 45 NNE 4 8 28 0 41 NE 7 11 13 4 36 ENE 4 22 14 0 42 E 6 12 11 0 30 ESE 10 15 4 0 31 SE 15 22 2 0 41 SSE 17 17 8 0 45 S 7 40 15 0 63 SSW 5 18 45 5 75 SW 8 24 46 2 81 WSW 5 9 7 1 24 W 2 10 7 1 22 WNW 4 22 8 0 35 NW 7 23 4 0 37 NNW 2 12 9 2 25 Variable 0 0 0 0 0 Total 23 103 277 252 17 1 673 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stabi*lity class: 0 Hours of missing stability measurements in all stability classes: 0

-- page 86 of 115--

-1 TABLE 18 (continued)

JOINT WIND FREQUENCY DISTRIBUTION BY-STABILITY CLASS Clinton Power Station

• Period of Record: July - September 2011 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 6 2 2 10 NNE "* 1 6 10 17 NE 3 9 13 27 ENE 0 11 6 20 E 5 10 2 17 ESE 7 8 0 19 SE 6 8 0 18 SSE 1 3 1 7 S 4 8 0 12 SSW 7 8 20 SW 1 3 10 15 WSW 2 5 2 10 W 3 4 6 14 WNW 3 9 0 12 NW 5 7 0 12 NNW 6 4 3 14 Variable 0 0 0 0 Total 19 57 104 63 1 0 244 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 87of115 --

TABLE 18 (continued)

JOINT WIND FREQUENCY DISTRIBUTION-BY STABILITY CLASS

'Clinton Power Station Period of Record: July - September 2011 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 0 0 0. 2 NNE 6 4 0 0 0 11 NE 2 12 0 0 0 18 ENE 5 6 4 0 0 16 E 10 15 4 0 0 30 ESE 4 8 2 0 0 15 SE 8 2 0 0 0 11 SSE 3 0 0 0 0 5 S 1 0 0 0 0 2 SSW 1 0 1 0 0 2 SW 1 2 1 0 0 5 WSW 0 3 0 0 0 4 W 1 4 0 0 0 5 WNW 1 2 0 0 0 3 NW 2 3 0 0 0 6 NNW 2 .4 1 0 0 9 Variable 0 0 0 0 0 0 Total 18 47 66 13 0 0 144 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 115--

TABLE 18 (continued)

JOINT WIND FREQUENCY DISTRIBUTION BY STABILITY CLASS

" Clinton Power Station Period of Record: October - December2011 Stability Class - Extremely Unstable - 60m-10m Delta-T (F)

Winds Measured at 10 Meters Wind Speed (in mph)

Wind Direction 1-3 ý 4-7 8-12 13-18 19-24 > 24 Total N 0 2 7 2 0 0 11 NNE 0 0 0 0 0 0 0 NE 0 0 4 0 0 0 4 ENE 0 1 0 0 0 0 1 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 4 0 0 0 0 4 SSE 0 4 2 0 0 0 6 S 0 5 12 0 0 0 17 SSW 0 2 13 6 0 0 21 SW 0 0 2. 0 0 0 2 WSW 0 0 0 0 0 0 0 W 0 2 4 6 0 0 12 WNW 0 5 10 15 1 0 31 NW 1 7 10 3 0 0 21 NNW 0 7 3 0 0 0 10 Variable 0 0 0 0 0 0 0 Total 1 39 67 32 1 0 140 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: 6

-- page 89 of 115 --

TABLE 18 ,(continued)

JOINT WIND FREQUENCY DISTRIBUTION BY STABILITY CLASS Clinton Power Station Period of Record: October - December2011 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 4 NNE 0 1 NE 0 1 ENE 0 2 E 0 0 ESE 0 0 SE 0 0 SSE 3 7 S 3 18 SSW 1 13 SW 1 5 WSW 6 13 W 5 10 WNW 1 8 NW 5 12 NNW 1 3 Variable 0 0 Total 4 27 42 21 0 97 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stabilityclass: 0 Hours of missing stability measurements in all stabilityclasses: 6

-- page 90 of 115 --

TABLE 18 (continued):

JOINT WIND FREQUENCY DISTRIBUTION BY STABILITY CLASS Clinton Power Station Period of Record: October - December2011 Stability Clas's - 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 4 NNE 5 NE 8 ENE 1 E 0 ESE 0 SE 2 SSE 10 S 16 SSW 14 SW 6 WSW 9

• W 8 WNW 7 NW 11 NNW 5 Variable 0 Total 1 29 41 29 6 0 106 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: 6

-- page 91 of 115 --

TABLE 18 (continued)

JOINT WIND FREQUENCY DISTRIBUTION BY STABILITY CLASS Clinton Power Station, Period of Record: October - December2011 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 1 9-24 .. > 24 Total N 13 77 17 5 112 NNE 1 14 20 6 41 NE 2 24 3 1 31 ENE 6 33 0 0 40 E 9 2 0 0 12 ESE 11 0 0 0 11 SE 7 1 0 0 10 SSE 19 21 5 0 49 S 38 53 50 4 146 SSW 13 41 59 15 130 SW 11 23 13 4 53 WSW 11 17 6 2 37 W 10 24 15 5 56 WNW 10 25 33 5 74 NW 11 25 29 3 69 NNW 19 55. 20 1 97 Variable 0 0 0 0 0 Total 17 191 435 270 51 4 968 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: 6

-- page 92 of115 --

TABLE 18 (continued)ý JOINT WIND FREQUENCY DISTRIBUTION BY STABILITY CLASS Clinton Power Station Period of Record: October -December2011

'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 24 > 24 Total N .5 5 0 10 NNE 5 4 0 12 NE 4 3 0 10 ENE 2 0 0 3 E 5 0 *0 5 ESE 8 2 16 0

SE 37 7 50 0

SSE 45 28 82 0

S 35 60 101 0

SSW 29 28 72 0

SW 28 34 0 66 WSW 20 19 0 43 W 14 27 0 54 WNW 21 36 0 63 NW 11 10 0 24 NNW 6 2 0 9 Variable 0 0 0 Total 49 275 265 31 0 0 620 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: 6

-- page 93 of 115 --

TABLE 18 (continued)

JOINT WIND FREQUENCY DISTRIBUTION BY STABILITY CLASS Clinton Power Station Period of Record: October - December2011

.Stability Class - Moderately Stable 1- 60em-I10m Delta-T (F)

Winds Measured at i0 Meters Wind Speed (in mph)

Wind Direction 1-3 :4-7 8-12 13-18 19-24 > 24 Total N 3 0 0 3 NNE 2 0 0 2 NE 3 0 0 6 ENE 1 0 0 4 E 3 0 0 3 ESE 7 0 0 10 SE 26 0 *, 0 28 SSE 23 0 0 30 S 11 0 0 22 SSW 0 0 13 SW 6 0 0 11 WSW 7 0 0 11 W 9 0 0 12 WNW 8 0 0 10 NW 3 0 0 3 NNW 1 0 0 2 Variable 0 0 0 0 Total 30 124 16 0 0 0 170 Hours of calm in this stability class: 1 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 6

-- page 94 of 115 --

TABLE 18 (continued)

JOINT WIND FREQUENCY DISTRIBUTION BY-STABILiTY CLASS Clinton Power Station Period of Record: October - December2011 Stability'Cl,ass hExtremely 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 0- 0 0 0 N 1 0 1 0 0 0 0 NNE 2 0 2 0 0 0 0 NE 13 3 16 0 0 0 0 ENE 5 0 5 0 0 0 0 E 4 2 6 0 0 0 0 ESE 5 2 7 0 0 0 0 SE 4 2 6 0 0 0 0 SSE 10 3 13 0 0 0 0 s 1 1 2 0 0 0 0 SSW 5 5 0 0 0 0 0 SW 4 4 0 0 0 0 0 WSW 4 4 0 0 0 0 0 W 0 0 0 0 0 0 0 WNW 8 8 0 0 0 0 NW 6 12 18 0 0 0 0.

NNW 2 1 3 0 0 0 0 Variable 0 0 0 Total 74 26 0 0 0 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: 6

-- page 95 of IS5 --

TABLE 18 (continued).

JOINTWIND FREQUENCY DISTRIBUTION BY STABILITY CLASS Clinton Power Station Period of Record: October - December2011 Stability Class - Extremely Unstable -- 60m-l10m DeltaTT (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 3 5 1 0 9 NNE 0 0 0 3 0 0 3 NE 0 0 0 0 0 0 0 ENE 0 0 3 1 0 0 4 E 0 0 1 0 0 0 1 ESE 0 0 0 0 0 0 0 SE 0 1 2 0 0 0 3 SSE 0 0 6 2 0 0 8 S 0 0 8 7 1 0 16 SSW 0 0 8 10 2 1 21 SW 0 0 0 2 0 0 2 WSW 0 0 0 0 0 i0 0 W 0 0 4 2 2 1 9 WNW 0 0 6 4 15 4 29 NW 0 3 10 6 1 0 20 NNW 1 4 9 1 0 00 15 Variable 0 0 0 0 0 0 0 Total 1 8 60 43 22 6 140 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: 6

-- page 96 of 115 --

TABLE 18 (continued)

JOINT WIND FREQUENCY DISTRIBUTION BY STABILITY CLASS Clinton Power Station Period of Record: October - December2011 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 4 NNE 1 NE 0 ENE 2 E 0 ESE 1 SE 0 SSE 5 S 17 SSW 18 SW 5 WSW 10 W 9 WNW 9 NW 11 NNW 5 Variable 0 Total 2 22 22 32 15 4 97 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: 6

-- page 97 of 115 --

TABLE 18 (continued)

JOINT WIND FREQUENCY DISTRIBUTION BY STABILITY CLASS Clinton Power Station Period of Record: October - December2011 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 1 2 1 0 5 NNE 0 3 2 1 0 6 NE 0 2 2 0 0 4 ENE 0 2 3 0 0 5 E 0 0 0 0 0 0 ESE 0 0 0 0 0 0 SE 1 1 0 0 0 2 SSE 0 3 5 0 0 9 S 0 4 4 3 5 16 SSW 0 0 4 7 3 1 15 SW 0 2 4 1 0 0 7 WSW 0 4 2 0 2 0 8 W 0 1 1 1 2 1 6 WNW 0 0 0 2 4 1 7 NW 0 0 4 2 3 1 10 NNW 0 3 2 1 0 0 6 Variable 0 0 0 0 0 0 0 Total 1 12 33 32 19 9 106 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: 6

-- page 98 of 115 --

8 TABLE 18 (continued)

JOINT WIND FREQUENCY DISTRIBUTION BY STABILITY'CLASS Clinton Power Station I Period of Record: October - Decembe r2011 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 6 32 74 14 12 138 NNE 2 6 12 15 5 40 NE 0 3 10 7 6 26 ENE 0 1 38 1 0 41 E 0 4 17 1 0 23 ESE 1 6 2 0 0 10 SE 3 9 0 1 0 14 SSE 7 10 10 8 2 38 S 4 31 29 54 34 153 SSW 7 11 31 41 33 123 SW 4 14 21 11 10 60 WSW 5 6 15 4 2 32 W 7 8 20 11 7 53 WNW 4 10 23 18 18 73 NW 5 14 21 21 9 71 NNW 6 17 33 8 9 73 Variable 0 0 0 0 0 0 Total 7 61 182 356 215 147 968 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: 6

-- page 99 of115 --

TABLE 18 (continued)

JOINT WIND-FREQUENCY DISTRIBUTION BY STABILITY, CLASS..

Clinton Power Station Period of Record: October - December2011 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 1 3 5 0 0 10 NNE 0 1 6 5 0 0 12 NE 0 0 2 3 3 0 8 ENE 1 0 1 1 0 0 3 E 0 3 0 1 0 0 4 ESE 0 2 2 5 2 .0 11 SE 2 3 23 4 1 0 33 SSE 0 4 24 44 12 .0 84 S 0 2 22 58 31 1 114 SSW 0 2 15 24 19 6 66 SW 0 4 16 28 14 2 64 WSW 0 3 12 22 4 0 41 W 0 3 9 24 24 0 60 WNW 1 4 9 28 13 0 55 NW 0 6 15 24 0 0 45 NNW 0 2 7 1 0 0 10 Variable 0 0 0 0 0 0. 0 Total 5 40 166 277 123 9 620 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: 6

--page 100of 15 --

TABLE 18 (continued)

JOINT WIND FREQUENCY DISTRIBUTION BY.STABILITY CLASS Clinton Power Station Periodof Record: October - December2011 Stability Class - Moderately Stable' - 60m-10m Delta-T (F)

Winds Measured at 60 Meters Wind Speed (in mph)

Wind Direction: 11-3 4-7 8-12 13-18 19-24 > 24 Total N 0 1 1 2 0 0 4 NNE 0 0 0 2 0 0 2 NE 0 1 1 1 0 0 3 ENE 0 1 3 2 0 0 6 E 0 2 1 2 0 0 5 ESE 0 0 1 1. 0 0 2 SE 0 10 1 0 11 SSE 2 14 15 0 34 S 2 10 17 0 33 SSW 3 8 5 0 16 SW 0 1 5 0 7 WSW 0 5 10 0 15 W 2 6 4 0 12 WNW 0 6 11 0 17 NW 0 3 0 0 3 NNW 0 1 0 0 1 Variable 0 0 0 0 0 Total 2 14 71 78 0 171 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: 6

-- page 101 of 115 --

TABLE 18 (continued)

JOINT WIND FREQUENCY DISTRIBUTION BY STABILITY CLASS Clinton Power Station Period of Record: October - ýDcembeb%2011 Stability Class'- Extreme'ly Stable '.- 60m-10'm'ODelta-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 . 1 4 '0 0 5 NE 0- 1 0 0 3 ENE 0 1 3 3 0 0 7 E 1 .. . .1:,

2, 0 .0 6 ESE 0 0 4 0 0ý 4 0

SSE 2 1 4 0 0 7 0

SSE 0 0 10 2 0 12 0

S 0 3 5 2 0 10 0

SSW 0 0 6 0 0 6 0

SW 0 0 4 0 0 4 0

WSW o 1 6 1 0 8 0

W 0 3 2 b 0 5 0

WNW o 3 0 0 0 3 0

NW 0 1 1 0 0 2 0

NNW 0 2 10 3 0 15 0

Variable 0 0 0 0 0 0 Total 3 18 64 15 0 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: 6

-- page 102of115--

SECTION 8 ODCM OPERATIONAL REMEDIAL REQUIREMENT REPORTS During the course-of. 201-1, there was one (1) occurrance where Surveillance requirements were not met. The event is documented below.

October 25, 2011 IR 1281881 Per ODCM Table 3.4-1 B.1, Standby Gas Treatment System (SGTS) exhaust is to be sampled and analyzed for noble gas and tritium upon initiation of flow for each release.

Contrary to this requirement, Chemistry did not obtain a valid analysis of noble gas for the SGTS train A surveillance run that started at 18:22 on 10/25/11.

Operations informed Chemistry that an SGTS run had started, and Chemistry sampled for noble gas at 19:29 on 10/25/11. The sample was analysed, but an analysis error resulted in non-representative result generation. A review of logbook and software data indicated that the sample was placed in the C detector, but a count was mistakenly started on the D detector.

Although valid SGTS effluent noble gas grab data was not obtained, review of plant parameters at the time of the SGTS run indicates that there were no conditions that would indicate any abnormal releases beyond the normally measured SGTS noble gas activity.

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SECTION 9 CHANGES TO RADIOACTIVE WASTE TREATMENT SYSTEMS In accordance with Section 7.2 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.

The Process Control Program (PCP) for radioactive. wastes is controlled by Radioactive Wastes procedure, RW-AA-100, with revision (7) as the last revision. No Changes were made in the procedure in 2011. .

There were no permanent changes to theSolid Radioactive WasteTreatment System during the course of the.2011 reporting.peri.od_.,

SECTION 10

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NEW LOCATIONS FOR DOSE CALCULATION AND / OR ENVIRONMENTAL MONITORING

.. The following is"a summary of the 2011 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 Residence

'The nearest residents identified in each -of the.sixteen (16) sectors are shown below. An asterisk notes any changes from the previous year below (*)

2011 2010 SECTOR RESIDENT AGE GROUP RESIDENT AGE GROUP (miles) (miles)

N 0.9 A 0.9 A NNE 0.9 A 0.9 A NE 1.3 A 1.3 A ENE 1.8 C, A 1.8 C, A E 1.0 A 1.0 A ESE 3.2 A 3.2 A SE 2.4 T,A 2.4 A SSE 1.8 A 1.8 A

• /

S 3.0 A 3.0 A SSW 2.9 A 2.9 A SW 0.7 A 0.7 A

• k WSW 2.2 A 2.2 T,A W 1.2 C, T, A 1.2 C, A WNW 1.6 A 1.6 A NW 1.6 A 1.6 A NNW 1.3 A 1.3 A (I)nfant (C)hild (T)een (A)dult

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SECTION 10 (continued) 2.0 Broadleaf Garden Census Eighty-seven (87) gardens.:within a five (5) mile radius were located in the sixteen (16) geographical sectors surrounding CPS.:. Twenty-three (23) gardens contained broad leaf vegetation.. Although other crops were, identifiedwithin these areas, they are not addressed as partof this report.

The nearest gardens greater than fifty (50) square-meters and producing broadleaf vegetation identified in each of the sixteen (16) geographical sectors are shown below.. An asterisk notes any changes from the previous year below;(*).

2011 201'0. .

SECTOR GARDENS AGE GROUPS GARDENS AGE GROUPS (miles) (miles)

N 0.9 A 0.9 A

,NNE 3.0 T,A 3.0. C, T, A NE 2.1 A 2.1 A ENE 1.8 C,A 2.7 A EI 2.5, C,A 1.0.. A ESE 3.3 A 3.3 A SE 4.4 CA 2.4- A SSE 2.8 A >5.

S 4.1 A 3.0 A SSW >5 > 5ý SW 3.6 CA 3.5 T, A WSW 2.3 A 2.3.: A W 2.0 CA 2.1, A WNW 1.6 A >5.

NW >5 >5 NNW 1.3 A 1.3 A (I)nfant (C)hild (T)een (A)dult

-- page 106 of 115 --

SECTION 10 (continued) 3.0 Milking Animal Census Milking animals within the sixteen (16) geographical sectors were located within five. (5) miles surrounding CPS. These milking animals were either used for the nursing of, their offspringr' or used for meat production for their own personal use and sold commercially. There were no'residents that milked their' animals for human consumption.

Milking animals Were6 specifically identified for this report. Although other livestock were identified within these'areas; they are not addressed as part of this report.

The nearest milking. animals identified in each of the sixteen (16) geographical sectors are shown below..**-An asterisk notes -any changes from the previous year below (*)

2011 MILKING . AGE.. .2010.MILKlNG AGE SECTOR ANIMALS (miles) GROUPS ANIMALS (miles) GROUPS N 0.9 A 0.9 A NNE 2.3 A 2.3, C; T, A NE >5 > 5 ENE >5 > 5 E >56 >5 ESE >5 > 5, SE >5 >5 SSE 2.8 T,A > 5 S >5 > 5 SSW >5 >5 SW >5 >5 WSW 3.4 A 3.4 A W >5 > 5 WNW >5 > 5 NW >5 > 5 NNW 1.3 A 1.3 A (I)nfant (C)hild (T)een (A)dult

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SECTION 11 CORRECTIONS TO DATA REPORTED IN PREVIOUS REPORTS

1. 2010 Errata Data A transposition error during qreation of a gaseous effluent permit lead to 1-131 activity being quantified when no 1-131 was detected. The error was rectified, yielding the following corrected data for-pages 17 - 19 of the 2010 Annual Radioactive Effluent Release Report (ARERR). Additionally, C-14 release data was reported with a carbon dioxide fraction. of 1.00, rather than the 0.95 factor described in the text on page 15 of the 2010 ARERR. This has been corrected to reflect the appropriate 0.95 factor. A bold ed value indicates an edited field.

-- page 108 of 115 --

4 .

2010 Errata SECTION 4 RADIOACTIVE EFFLUENT DATA TABLE 1 GASEOUS EFFLUENTS -Sumrmmation Of All Releases

• Data" Period: 01 January 2010 - 31' December 2010 Continuous Mixed Mode Units [ Quarter Quarter Quarter Quarter Est.

4 1 1Total Error, 0/

A. 1 i_7 3r 4 A. Fission & Activation Gases

1. Total Release Ci 1.11E+00 0.OOE+01 0.OOE+01 O.OOE+01 30

2. Average release pCi/se 1.42E-01 0.OOE+01 0.OOE+01 0.OOE+01

3. Percent of  %

ODCM Limit

• B. lodines

1. Total Iodine-131 Ci 1.71E-05 0.OOE+01 1.99E-06 9.19E-07 31

2. Average release rCi/se rate for period c 2.20E-06 0.OOE+01 2.50E-07 1.16E-07

3. Percent of  %

ODCM Limit C. Particulates

1. Particulates with Ci 8.37E05 0.OOE+01 O.OOE+01 0.OOE+01 24 half-lives >8 days C 8E00 1 0 1 0 1 2

2. Average release pCi/se rate for period c 1.08E-05 0.00E+01 0.00E+01 0.00E+01

3. Percent of ODCM Limit

4. Gross alpha radioactivity Ci 7.70E07 3.08E09 6.27E07 9.35E07 D. Tritium

1. Total Release Ci 5.03E+00 4.95E+00 4.91E+00 3.83E+00 21 2.~ i/sAerag relase

2. Average release ýtCi/se rate for period 6.47E-01 6.29E-01 6.18E-01 4.81 E-01 c

3. 1 Percent of ODCM Limit  % * * *

• E. Carbon-14

1. Total Release Ci 2.66E+00 4.02E+00 4.07E+00 4.07E+00

2. Average release pCi/se Rate for period c 3.42E-01 5.12E-01 5.11E-01 5.12E-01 Applicable limits are expressed in terms of dose. See Tables 1A and 1B of this report.

-- page 109 of 115--

E I 2010 Errata TABLE 1A Air Doses.Due to Gaseous Releases Doses per Quarter Type of ODCM 1t  % of 2 *  % of 3 rd  % of 4 1h  % of Radiation Limit Quarter Limit Quarter Limit Quarter Limit Quarter Limit Gamma 5 mrad 9.28E-06 1.86E-04 0.OOE+0.1 0.00E+01 0.00E-.01 .0.00E+01 0.1OOE+01, 0.00E+01 Beta 10 mrad 1.19E-05 1.19E-05 -0.00E+61 0.00E+01 0.00E+01 0.00E+01 0.00E+01 0.00E+01 Doses per Year Type of ODCM Year %ofLimit Radiation . Limit Gamma 10 mnrad 9.28E-06.. _9.28EH05 Beta 20 mrad 1.19E-05 5.95E-05 TABLE 1B Doses to a Member of the Public Due toýRadioiodines, Tritium, Carbon-14, and Particulates inGaseous Releases-Dsser Quarter Type of ODCM. Quarter  % of Quarter .  % of; Qarter  % of Quarter  % of Organ Limit 1 Limit 2- Limit-, 3' Limit 4 Limit Bone 7.5 mrem ,6.03E;-03 *8.05E-02 9..12E-03 1.22E-bOI '9.22E-03 1.23E-01 '9.23E-03 1.23E-01 Liver 7.5 mrem 7.28E-05 9.71&E.04 7.06E'05T 9.41E-04 ".00E-05 9.34E-04 5.45E-05 7.27E-04 TBody 7.5 mrem 1.31 E-03 1.74E-02 1.89E-03 2.52Eý02 1,.91E-03 2.55E-02 1.90E-03 2.53E-02.

Thyroid 7.5 mrem, 1.16E-04 1.55E-03 7.06E-05 9.42E-04.7.53E-05 1.00E-03 5.70E-05 7.60E-04 Kidney 7.5 mriam 7.23E-05 9.613E-04 7.06E-05,.' 9.42E-04 :t7.01,E-05 9.35EL-04 5.46E-05 7.28E-04 Lung 7.5 mrem 7.25E-05 9.66E-04 7.06E-05 9.42E-04 7.01E-05 9.34E-04 5.46E-05 7.28E-04 GI LLI 7.5 mrem 7.94E-05 1.0'6E-03 7.06E-'05:' '9.42E-04 :7.01E-05 9.34E-04 5.46E-05 7.28E-04 Doses per Year Type of ODCM Year * %of Organ Limit Ya Limit Bone 15 mrem 3.36E-02 2.24E-01 Liver 15 mrem 2.68E-04 1.79E-03 TBody 15 mrem 7.OOE-03 4.67E-02 Thyroid 15 mrem 3.19E-04 2.13E-03 Kidney 15 mrem 2.68E-04 1.78E-03 Lung 15 mrem 2.68E-04 1.79E-03 GI LLI 15 mrem 2.75E-04 1.83E-03 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 110 of 115 --

2010 Errata TABLE 2 CLINTON POWER STATION.

GASEOUS EFFLUENTS - Nuclides Released YEAR:2010 Mixed Mode Release X Elevated Release IContinuous Mode I X Ground-Level Release Batch Mode I Units Quarter Quarter Quarter Quarter A. Fission Gases [1] 211 221 3[2] 4(21 Xe-1 35 1.111E-ý00:--: 0.00E+01 0.00E+01 0*OOE+01 Total for Period Ci 1.1,1E+00, 0.00E+1 0.OOE+01 0.OOE+01 B. Iodines [Il 1-131 Ci 1.71E-05 0.OOE+01 1.99E-06 9.19E-07 1-133 Ci 0.OOE+01 O.OOE+01 0.OOE+01 4.05E-06 Total for Period Ci 1.71_E_05_', 0.OOE+01 1.99E-06 4.97E-06 C. Particulates [1]

Co-60 Ci "'2.12lE-05 -O000'E+01 0':OOE+01 0.OOE+01 Y-91M ":'Ci '11.I OE-02 _0.00E+01 0.OOE+01 1.81E-03 Mo-99 Ci 7.46E-08 0.OOE+01 0.OOE+01 0.OOE+01 Mn-54 Ci 2.96E-05 0.OOE+01 0.OOE4:01 0.OOE+01 Cs-138 " Ci 0.OOE+01 0.OOE+01 1.51E-02 O.OOE+01 Cr-51 Ci 3.31 E-05,: 0.00E+01 0.00E+01 0.OOE+01 Gross Alpha Ci 7.70E-07, 3.08E-09 6.27E-07 9.35E-07 Total for Period Ci ... 1.10E-02 3.08E-09 1.51E-02 1.81E-03 D. Tritium [1]

Total for Period - !Cif- 5.03E+00.. 4.95E+00 4.91 E+00. 3.83E+00 E. Carbon-14 [1]

Total for Period, CCi 2.80E00. 4.23E+00 4.28E+00 4.28E+00

[1] Ten (10) times the values found in i0CFR20 Appendix B, Table'2, Column 1 are used for all Effluent Concentration Limit [ECL] calculations. For dissolved and entrained noble gases, the concentration is limited to 2.OOE-04 pCi/cc total activity.

(2] The lower the value of the actual sample. activity .- with respect to background activity - the greater the counting error. Proportionally, large errors are reported for the various components of CPS 'gaseous effluents because of their consistent low sample activity.

An entry of 0.OOE+01 indicates that the Minimum Detectable Activity (MDA) concentration of the radionuclide was below the LLD value listed in Table 6.

-- page 111 of 115 --

2. 2009 - 2010 Errata Data An inconsistency in conversion factors used for converting kilometers to miles for the purpose of reporting nearest resident data lead to rournding issues-that in some cases gave a false indication of a new census location as reported in the Annual Radioactive Effluent Release Report. Application of a consistent conversion factor yielded the following corrected data for page 105 of the 2010 and 2009 Annual Radioactive, Effluent Release. Reportsi respectively. A bolded value indicates anedited field. ,

-- page 112 of 115 --

2009-2010 Errata SECTION 10 NEW LOCATIONS FOR DOSE CALCULATION:AND / OR ENVIRONMENTAL MONITORING The following is a summary of the 2010 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 Residence The nearest residents identified in each of the sixteen (16) sectors are shown below. An asterisk notes any changes from the previous year below (*)

2010 2009 SECTOR RESIDENT AGE GROUP RESIDENT AGE GROUP (miles) (miles)

N 0.9 A 0.9 A NNE 0.9 C, A 0.9 C, A NE 1.3 A 1.3 A ENE 1.8 C, A 1.8 C, A E 1.0 A 1.0 A ESE 3.2 A 3.2 A SE 2.4 A 2.4 C, T, A SSE 1.8 A 1.8 A S 3.0 A 3.0 A SSW 2.9 A 2.9 A SW 0.7 A 0.7 A WSW 2.2 T, A 1.6 A W 1.2 C, A 1.2 C, A WNW 1.6 A 1.6 A NW 1.6 A 1.6 A NNW 1.3 A 1.3 A (I)nfant (C)hild (T)een (A)dult

-- page 113 of 115 --

2009- 2010 Errata SECTION 10 NEW LOCATIONS FOR DOSE CALCULATION AND iiOR ENVIRONMENTAL MONITORING The following is a summary of the 2009 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 Residence The nearest residents identified in each of the sixteen (16) sectors are shown below. An asterisk notes any changes from the previous year below (*)

2009 2008 SECTOR RESIDENT AGE GROUP RESIDENT AGE GROUP (miles) (miles)

N 0.9 A 0.9 A NNE 0.9 C, A 0.9 C, A NE 1.3 A 1.3 A ENE 1.8 C, A 1.8 C, A E 1.0 A 1.0 A ESE 3.2 A 3.2 A SE 2.4 C, T, A 2.4 C, T, A SSE 1.8 A 1.8 A S 3.0 A 3.0 A SSW 2.9 A 2.9 A SW 0.7 A 0.7 A WSW 1.6 A 1.6 A W 1.2 C, A 1.2 C, A WNW 1.6 A 1.6 A NW 1.6 A 1.6 A NNW 1.3 A 1.7 A (I)nfant (C)hild (T)een (A)dult SECTION 12

-- page 114 of 115 --

4 ~..

CHANGES TO THE OFFSITE DOSE CALCULATION MANUAL There were no changes to the Offsite Dose Calculation Manual in 2011.

-- page 115 of 115 --