Text

2020 Annual Radioactive Effluent Release Report
	ML21120A211
Person / Time
Site:	Browns Ferry
Issue date:	04/30/2021
From:	Rasmussen M; Tennessee Valley Authority
To:	; Document Control Desk, Office of Nuclear Reactor Regulation
References
	Download: ML21120A211 (165)
	v • d • e

Post Office Box 2000, Decatur, Alabama 35609-2000 April 30, 2021 10 CFR 50.4 10 CFR 50.36 §a 10 CFR 50 Appendix I ATTN: Document Control Desk U.S. Nuclear Regulatory Commission Washington, D.C. 20555-0001 Browns Ferry Nuclear Plant, Units 1, 2, and 3 Renewed Facility Operating License Nos. DPR-33, DPR-52, and DPR-68 NRC Docket Nos. 50-259, 50-260, and 50-296

Subject:

2020 Annual Radioactive Effluent Release Report In accordance with the Browns Ferry Nuclear Plant (BFN), Units 1, 2, and 3, Technical Specification Section 5.6.3, the Tennessee Valley Authority is submitting the BFN Annual Radioactive Effluent Release Report for the period January through December 2020. This document is in conformance with Title 10 of the Code of Federal Regulations (10 CFR) 50.36a and 10 CFR 50, Appendix I, Section IV.B.1.

There are no new regulatory commitments contained in this letter. Should you have any questions concerning this submittal, please contact Jamie Paul at (256) 729-2636.

Respectfully, M. M. Rasmussen Site Vice President

Enclosure:

2020 Annual Radioactive Effluent Release Report cc (w/ Enclosures):

NRC Regional Administrator - Region II NRC Senior Resident Inspector - Browns Ferry Nuclear Plant NRC Project Manager - Browns Ferry Nuclear Plant p

y, 1\\14 TENNESSEE VALLEY AUTHORITY

ENCLOSURE Browns Ferry Nuclear Plant Units 1, 2, and 3 2020 Annual Radioactive Effluent Release Report See Enclosed

BrownsFerryNuclearPlant TennesseeValleyAuthority

AnnualRadioactive EffluentReleaseReport 2020

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I.

SupplementalInformation....................................................................................................................4 A.

RegulatoryLimits..............................................................................................................................4 B.

LimitationonDoseRate....................................................................................................................4 C.

AverageEnergy.................................................................................................................................5 D.

Measurements&ApproximationsofTotalRadioactivity.................................................................5 E.

BatchReleases..................................................................................................................................7 F.

AbnormalReleases............................................................................................................................8 G.

Nonroutine,PlannedDischarges.....................................................................................................9 H.

RadioactiveWasteSystemTreatmentChanges...............................................................................9 I.

LandUseCensusChanges.................................................................................................................9 J.

EffluentMonitoringInstrumentInoperability>30Days..................................................................9 K.

EffluentMonitoringEquipmentSampleDeviation...........................................................................9 L.

OffsiteDoseCalculationManualChanges........................................................................................9 M.

GroundwaterMonitoringandProgram(NEI0707)...................................................................10 Table9GroundwaterData...................................................................................................................11 N.

Errata/CorrectionstoPreviousARERRs..........................................................................................12 II.

GaseousEffluents...............................................................................................................................13 Table1AGaseousEffluentsSummationofallReleases......................................................................13 Table1BGaseousEffluents-GroundLevelReleases(Batch)...............................................................14 Table1BGaseousEffluents-GroundLevelReleases(Continuous).....................................................15 Table1CGaseousEffluents-ElevatedReleases(Batch)......................................................................16 Table1CGaseousEffluents-ElevatedReleases(Continuous).............................................................17 Table1DGaseousEffluents-MixedModeReleases(Batch)...............................................................18 Table1DGaseousEffluents-MixedModeReleases(Continuous)......................................................19 III.

LiquidEffluents...............................................................................................................................20 Table2ALiquidEffluentsSummationofallReleases..........................................................................20 Table2BLiquidEffluents-BatchMode................................................................................................21 Table2BLiquidEffluents-ContinuousMode.......................................................................................21 IV.

SolidWasteStorageandShipment.................................................................................................22 A.

SolidWasteShippedOffsiteforBurialorDisposal(NotIrradiatedFuel)......................................22 B.

IrradiatedFuelShipments(Disposition).........................................................................................25 V.

RadiologicalImpacttoMan................................................................................................................26 A.

Introduction....................................................................................................................................26

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B.

DoseLimits......................................................................................................................................26 C.

DoseCalculations............................................................................................................................27 D.

DosesfromAirborneEffluents........................................................................................................27 E.

DosesfromLiquidEffluents............................................................................................................29 F.

PopulationDoses............................................................................................................................30 G.

OffsiteDirectRadiationDose..........................................................................................................30 H.

DosetoaMemberofthePublicInsidetheSiteBoundary.............................................................31 I.

TotalDose.......................................................................................................................................31 J.

Tables..............................................................................................................................................32 Table3ADosesfromAirborneEffluents-1stQuarter..........................................................................32 Table3BDosesfromAirborneEffluents-2ndQuarter.........................................................................33 Table3CDosesfromAirborneEffluents-3rdQuarter..........................................................................34 Table3DDosesfromAirborneEffluents-4thQuarter..........................................................................35 Table4ADosesfromLiquidEffluents-1stQuarter...............................................................................36 Table4BDosesfromLiquidEffluents-2ndQuarter..............................................................................36 Table4CDosesfromLiquidEffluents-3rdQuarter..............................................................................37 Table4DDosesfromLiquidEffluents-4thQuarter..............................................................................37 Table4ETotalDosefromI131WaterIngestion..................................................................................38 Table4FTotalDosefromGroundwater................................................................................................38 Table5TotalDosefromFuelCycle.........................................................................................................39 VI.

MeteorologicalData.......................................................................................................................40 Table6A1stQuarterJFDGroundLevelReleases..................................................................................40 Table6B2ndQuarterJFDGroundLevelReleases.................................................................................48 Table6C3rdQuarterJFDGroundLevelReleases..................................................................................56 Table6D4thQuarterJFDGroundLevelReleases.................................................................................64 Table7A1stQuarterJFDSplitLevelReleases.......................................................................................72 Table7B2ndQuarterJFDSplitLevelReleases......................................................................................87 Table7C3rdQuarterJFDSplitLevelReleases.....................................................................................102 Table7D4thQuarterJFDSplitLevelReleases.....................................................................................117 Table8A1stQuarterJFDElevatedReleases........................................................................................132 Table8B2ndQuarterJFDElevatedReleases.......................................................................................140 Table8C3rdQuarterJFDElevatedReleases.......................................................................................148 Table8D4thQuarterJFDElevatedReleases.......................................................................................156

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I.

SupplementalInformation A. RegulatoryLimits

1. GaseousEffluents FissionandActivationGases ThereleaseoffissionandactivationgasesisregulatedbythedoselimitsofTitle10of theCodeofFederalRegulations(10CFR)50AppendixIandBrownsFerryNuclearPlant (BFN)OffsiteDoseCalculationManual(ODCM).Theairdosetoareasatandbeyondthe siteboundaryduetonoblegasesreleasedingaseouseffluentsperunitshallbelimited duringanycalendarquarterto5millirad(mrad)forgammaradiationand10mradfor betaradiation;andduringanycalendaryearto10mradforgammaradiationand20 mradforbetaradiation.

IodinesandParticulateswithHalfLivesGreaterthanEightDays Thereleaseofiodinesandparticulatesingaseouseffluentisregulatedbythedose limitsof10CFR50AppendixIandtheBFNODCM.Thedosetoamemberofthepublic fromradioiodines,radioactivematerialsinparticulateform,andradionuclidesotherthan noblegaseswithhalflivesgreaterthaneightdaysingaseouseffluentreleasedperunit toareasatandbeyondthesiteboundaryshallbelimitedtoanyorganduringany calendarquarterto7.5millirem(mrem),andduringanycalendaryearto15mrem.

2. LiquidEffluents Thereleaseofradioactiveliquideffluentsisregulatedbythedoselimitsof10CFR50 AppendixIandtheBFNODCM.Thedosesordosecommitmenttoamemberofthe publicfromradioactivematerialsinliquideffluentsreleasedfromeachunitto unrestrictedareasshallbelimitedduringanycalendarquarterto1.5mremtothetotal bodyand5mremtoanyorganandduringanycalendaryearto3mremtothetotal bodyand10mremtoanyorgan.

B. LimitationonDoseRate

1. GaseousEffluents FissionandActivationGases Theinstantaneousreleaserateoffissionandactivationgasesisbasedonthedose ratelimitsof10CFR20.1301andtheBFNODCM.Thedoserateatanytimetoareasat andbeyondthesiteboundaryduetonoblegasesreleasedingaseouseffluentsfromthe siteshallbelimitedto500mremperyeartothetotalbodyand3000mremperyear totheskin.

TheBFNODCMSection7.2determinesthemaximumnoblegasreleaserate.

IodinesandParticulateswithHalfLivesGreaterthanEightDays Theinstantaneousreleaserateofparticulatesandiodinesisregulatedbythedose ratelimitsoftheBFNODCM.Thedoserateatanytimetoareasatandbeyondthesite boundary,duetoI131,I133,H3,andparticulateswithhalflivesgreaterthaneightdays

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ingaseouseffluentreleasedfromthesite,shallbelimitedto1500mremperyearto anyorgan.TheBFNODCMSection7.3determinesthemaximumparticulateandiodine doserates.

2. LiquidEffluents Theconcentrationofradionuclidesinliquideffluentsreleasedatanytimefromthe sitetounrestrictedareasshallbelimitedtotheconcentrationsspecifiedin10CFR 20.100120.2402,AppendixB,Table2,Column2forradionuclidesotherthandissolved orentrainednoblegases.

Fordissolvedorentrainednoblegases,theconcentrationshallbelimitedto2E4Ci permilliliter(ml)totalactivity.

C. AverageEnergy TheBFNODCMlimitsthedoseequivalentratesduetothereleaseofnoblegasesto lessthanorequalto500mrem/yeartothetotalbodyandlessthanorequalto3000 mrem/yeartotheskin.TheuseofdoserateisinaccordancewithNUREG0133, "PreparationofRadiologicalEffluentTechnicalSpecificationsforNuclearPowerPlants."

Sincethereleaserateisnotusedforeffluentcontrol,theaveragebetaandgamma energies(E)forgaseouseffluentsdiscussedinRegulatoryGuide1.21,"Measuring, Evaluation,andReportingRadioactivityinSolidWastesandReleasesofRadioactive MaterialsinLiquidandGaseousEffluentsfromLightWaterCooledNuclearPower Plants,"arenotapplicableandnotincludedinthisreport.

D. Measurements&ApproximationsofTotalRadioactivity RadioactivitymeasurementsperformedinsupportoftheBrownsFerryNuclearPlant ODCMmeettheLowerLimitofDetection(LLD)requirementsgiveninODCMTables2.21 and2.22.

1. GaseousEffluents Noblegasesinthebuildingventandstack(elevated)gaseouseffluentsare continuouslymonitored.Theflowrateofthestackiscontinuouslymonitoredandthe buildingventeffluentflowratesarecalculatedonceashiftbasedontheconfigurationof operatingexhaustfans.Theventflowiscalculatedforeachrelease.Gasgrabsamplesof thestackaretakenandanalyzedweekly.Gasgrabsamplesofinserviceventsaretaken andanalyzedmonthly.Thespecificnoblegasactivityconcentrationsandtotalvolumeof thegasesareusedtocalculatethetotalCuries(Ci)ofnoblegasesreleased.

In2019,BrownsFerryrevisednoblegassamplingandanalysisprocedureswhich includedsamplingwithalargervolume(1240ccgasMarinelli)andanalyzingforalonger counttime(1000seconds).Sincethisrevision,thesitehasdetectedlowlevelsofnoble gasesinthestackvent,whichisexpected.

Thetritiumconcentrationisdeterminedbytheanalysisofamonthlygrabsamplefor eachreleasepoint.

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Iodinesandparticulatesarecontinuouslysampledonimpregnatedcharcoalfilters andparticulatefilters,respectively.Thecharcoalandparticulatesamplesarereplacedat leastweeklyandanalyzedtodeterminespecificactivityconcentrations.Thespecific

activityconcentrationsandventflowratedataareusedweeklytoverifythatrelease ratelimitswerenotexceeded.Thespecificactivityconcentrationsandtotalvolumeof gaseouseffluentareusedonamonthlybasistodeterminethetotalcuriesofeach particulateandiodinereleasedduringthemonth.

Thegrossalphaconcentrationisdeterminedbyanalysisofamonthlyparticulatefilter compositesample,andstrontium89andstrontium90aredeterminedbyanalysisofa quarterlyparticulatefiltercompositesampleforeachreleasepoint.

Carbon14(C14)productionandgaseouswasteeffluentactivitysourceterm estimateswerebasedonmethodologyprovidedinEPRI1021106EstimationofCarbon 14inNuclearPowerPlantGaseousEffluents(December2010).C14gaseousactivityand dosecalculationsaremadeusingthefollowingassumptions:(1)continuousreleaseof theestimatedC14generatedforeachunitduringpoweroperationbasedonthe numberofEffectiveFuelPowerDays(EFPD)fortheperiod,(2)maximumC14activity fromliteraturevaluescitedinEPRIReport1021106,and(3)typicalfractionascarbon dioxideforgaseousreleasesfromliteraturevaluesalsocitedinEPRIReport1021106.

In2019,BrownsFerryupdatedC14productionrateestimatesutilizingtheproxy methodologyprovidedinEPRIReport1021106.TVAdocumentedthisupdateinUpdated Carbon14ProductionRateEstimatesforGaseousReleasesatTVANPGSites(October 2019).TheC14releasesincreasedin2019duetoallthreeunitscompletingExtended PowerUprate(EPU).TheEPUforeachunitincreasedtheunitsMWth(Megawatt thermal)from3,458to3,952MWth.ThisincreaseinMWthisusedinthecalculationof C14releases.TheincreaseinC14releasesisexpected.

2. LiquidEffluents Thegammarayemittingradionuclideconcentrationsaredeterminedforeachbatch bygammarayspectroscopyanalysisofagrabsample.Theallowablereleaserateis calculatedforeachbatchbasedupontheknowndilutionflow.Theflowrateoftheliquid effluentiscontinuouslymonitoredandthetotalvolumereleasedineachbatchis determined.Thetotalgammaactivityreleasedineachbatchisdeterminedby multiplyingtheradionuclideconcentrationsbythetotalvolumedischarged.Thetotal gammaactivityreleasedduringthemonthisthendeterminedbysummingthegamma activitycontentofeachbatchdischargedduringthemonth.

Thegrossalphaandtritiumconcentrationsaremeasuredonamonthlycomposite sample.Thestrontium89,strontium90,andiron55aremeasuredonaquarterly compositesample.

TheRadioactiveGaseousandLiquidWasteMonitoringSamplingandAnalysisProgramis specifiedinODCMSections1/2.2.1and1/2.2.2.Therewerenoliquidorgaseousconcentrations ordoselimitsexceededinthe2020reportingperiod.

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E. BatchReleases

1. Gaseous

2. Liquid

Units 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Total 1.Gaseous

1.NumberofBatch Releases Each 1

3 1

1 6

2.Totaldurationof batchreleases minutes 4.80E+01 1.44E+02 4.80E+01 4.80E+01 2.88E+02 3.Maximumbatch releaseduration minutes 4.80E+01 4.80E+01 4.80E+01 4.80E+01 4.80E+01 4.Averagebatch releaseduration minutes 4.80E+01 4.80E+01 4.80E+01 4.80E+01 4.80E+01 5.Minimumbatch releaseduration minutes 4.80E+01 4.80E+01 4.80E+01 4.80E+01 4.80E+01

Units 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Total 2.Liquids

1.NumberofBatch Releases Each 14 25 9

24 72 2.Totaldurationof batchreleases minutes 4.37E+03 6.32E+03 2.81E+03 7.55E+02 2.10E+04 3.Maximumbatch releaseduration minutes 4.20E+02 4.15E+02 4.25E+02 5.85E+02 5.85E+02 4.Averagebatch releaseduration minutes 3.12E+02 2.53E+02 3.12E+02 3.14E+02 2.92E+02 5.Minimumbatch releaseduration minutes 1.00E+00 2.20E+02 2.55E+02 2.15E+02 1.00E+00 6.Avg.streamflow duringperiodsof releaseofliquid effluentintoa flowingstream CFS 1.40E+05 6.81E+04 2.95E+04 5.79E+04 NA

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F. AbnormalReleases

1. Gaseous Abnormalgaseoustritiumreleasesoccurred2020fromtheAuxiliaryBoilerSystemwhenthe boilerswereinserviceforunitoutagesandwintermonths.Theidentifiedsourceoftritiumto theauxiliaryboilersystemismainsteamleakbyfromdegradedSteamJetAirEjector(SJAE)/

AuxiliaryBoilervalvestotheauxiliaryboilerheader(CR1508177).Beginningin2022,these valveswillbereplacedduringeachunitsrespectiveoutage.

2. Liquid Abnormalliquidtritiumreleasesoccurredthroughout2020fromtheUnit1andUnit2Station Sumps.PlantstationsumpsareautopumpedtounitspecificCondenserCirculatingWater (CCW)dischargeandsubsequentlytotheTennesseeRiver.Identifiedsourcesinclude:main steamleakbyfromdegradedSJAE/AuxiliaryboilersystemvalvestoUnit1StationSump, VacuumPrimingsystemandmultiplesteamleaksintheSJAEandOffgasRecombinerrooms.

Units 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Total 1.Gaseous

1.Numberof abnormalReleases Each 1

1 0

1 3

2.TotalActivityfor abnormalreleases Ci 8.89E02 3.54E02 0.0E+00 3.61E01 4.85E01

Units 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Total 2.Liquid

1.Numberof abnormalReleases Each 2

2 2

2 8

2.TotalActivityfor abnormalreleases Ci 4.96E01 1.20E+00 4.74E01 5.44E01 2.72E+00 I

I I

I

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G. Nonroutine,PlannedDischarges Incalendaryear2020therewerenononroutineplanneddischarges.

H. RadioactiveWasteSystemTreatmentChanges Incalendaryear2020RadwasteTrainBoftheAvanTechSystemwasplacedinservice.

TherewerenochangestotheProcessControlProgram(PCP).

I. LandUseCensusChanges Incalendaryear2020therewerenochangestothelandusecensus.

J. EffluentMonitoringInstrumentInoperability>30Days Incalendaryear2020therewasoneradwasteliquidflowindicatorandtwogaseous effluentmonitorsinoperableforgreaterthan30days.

1. TheLiquidRadwasteDischargeFlowIndicator,0FIC770060,wasdeclaredinoperable 10/25/2019duringperformanceof0SI4.8.A.11duetotheaverageflowratebeing outsidetheacceptancecriteriaof8%.The0FIC0770060wasreturnedtoservice 2/18/2021.(CR1560354,CR1568432,LCOTR#0077ODCM20190001).

2. Gaseouseffluentcontinuousradiationmonitor,3RM90250,wasdeclaredinoperable 1/25/2020duetosamplepumpabnormalalarm.Theradiationmonitorwasreturnedto service2/26/2020.Theradiationmonitorwasinoperableforthisdurationdueto awaitinganewsamplepump.(CR1581730,CR1590022,WO121064413, LCOTR#3090ODCM20200018).

3. Gaseouseffluentcontinuousradiationmonitor,2RM90249,wasdeclaredinoperable 11/2/2020duetocommunicationchannelfailure.Theradiationmonitorwasreturnedto service1/29/2021.DuetorequiringareplacementCPUandmonitorcomputersare obsolete,DesignChangeBFN201914wasimplemented(CR1649408,CR1660950, WO121735665,LCOTR#2090ODCM20200054).

K. EffluentMonitoringEquipmentSampleDeviation Incalendaryear2020therewerenoeffluentmonitoringequipmentsampledeviations.

L. OffsiteDoseCalculationManualChanges Incalendaryear2020therewerenochangestotheOffsiteDoseCalculationManual.

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M. GroundwaterMonitoringandProgram(NEI0707)

In2007,theNuclearEnergyInstitute(NEI)establishedtheGroundwaterProtection Initiative(GPI),NEI0707.TheGroundwaterProtectionInitiativewasestablishedto1) improvemanagementofsituationsinvolvinginadvertentradiologicalreleasesthatgetinto groundwaterand2)toimprovecommunicationwithexternalstakeholderstoenhancetrust andconfidenceonthepartoflocalcommunities,States,theNRC,andthepublicinthe nuclearindustryscommitmenttoahighstandardofpublicradiationsafetyandprotection oftheenvironment.Thissectionprovidesinformationandsampleresultsfromonsite groundwaterlocationsthatweresampledinsupportoftheGroundwaterProtection InitiativeatBrownsFerryNuclearPlant.Thegroundwaterwellsdescribedinthissectionare notpartoftheRadiologicalEnvironmentalMonitoringProgram(REMP).

Intheearly2000s,BFNinitiatedagroundwaterstudytoidentifythesourceoflowlevel tritiumdetectedonsite.Resultsfromthegroundwaterstudy(InvestigationofTritium ReleasestoGroundwater,2006),suggestthesourceoftritiatedgroundwaterwasfrom historicalleaksandspillsassociatedwithRadwaste/Condensatetransfertunnel.

Groundwaterandsurfacewaterlevelmeasurementsduringthestudyindicatedthereturn channelandsubsequentlytheTennesseeRiverwillultimatelyberecipienttotritiated groundwaterdischargefromthesite.Ithasbeendeterminedthattherearenogroundwater wellsonsiteorwithin2milesofthesitethatareusedasasourceofdrinkingwater.

Groundwatermovementintheareahasbeendeterminedtobefromtheplantsitetoward theTennesseeRiver.

Onsitegroundwatermonitoringwasperformedin2020.Thepurposeofonsite groundwatermonitoringistoensuretimelydetectionofinadvertentradiologicalreleasesto groundwater.NonREMPgroundwaterwellsmonitorforpotentialleaksfromplant equipment.AspartoftheGPI,BFNmonitoredatotalof30groundwaterwellslocatedinthe protectedareaandtheownercontrolledareaduring2020.Normalsamplingfrequenciesare quarterlyandsemiannuallywithsomewellssampledmonthlyifcertaincriteriaaremetor forinvestigationpurposes.Samplesareroutinelyanalyzedforenvironmentalleveltritium (H3)andprinciplegammaemitters(PGE)withselectedwellsanalyzedforHardtoDetect (HTD)radionuclides(GrossAlpha,Fe55,Ni63,Sr89,andSr90).Insupportofthe groundwaterprogram,thesitealsomonitorsrecaptureandonsitestormdrains,catch basinsandsurfacewater.

In2020,lowlevelsoftritiumweredetectedinonsitegroundwaterwellsasindicatedin Table9,GroundwaterData.Table9demonstratesallonsitegroundwaterwellsthat indicateddetectabletritiumconcentrations.Tritiumconcentrationsin2020rangedfrom nondetectable,lessthan163pCi/L,uptoamaximumconcentrationof35,400pCi/L (DewatA).BFNhasbeenmonitoringalegacytritiumplumeinthevicinityofgroundwater wellDewatAlocatedadjacenttothereactorbuilding.Thisplumeistheresultofprevious leaksinpastyears(2015and2016).Nootherplantrelatedradionuclidesweredetectedin anygroundwaterwell.Therewerenoinstancesofanyonsitespillsorleaksthatoccurred during2020reportingperiodthatwerecommunicatedtooffsiteagenciesorthatmetthe criteriainNEI0707,AppendixA.

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Table9GroundwaterData SampleDate WellID Tritium (pCi/L) 1stQuarter2020 2/7/2020 DewatA 35400 3/5/2020 DewatA 34400 2/6/2020 MW01 2260 2/5/2020 MW02 1430 2/4/2020 MW02i 4160 3/5/2020 MW02i 2800 2/6/2020 MW03 579 2/4/2020 MW04 1260 2/6/2020 MW07 1170 2/6/2020 MW08 3150 2/5/2020 MW8i 559 2/4/2020 MW15 257 2/4/2020 MW18 1360 2/5/2020 MW19 1050 2ndQuarter2020 4/2/2020 DewatA 11800 5/7/2020 DewatA 5290 6/2/2020 DewatA 3110 5/7/2020 MW01 1390 5/8/2020 MW02 1500 4/2/2020 MW02i 519 5/8/2020 MW02i 1110 5/7/2020 MW03 685 5/6/2020 MW04 457 5/7/2020 MW07 2300 5/7/2020 MW08 7480 6/2/2020 MW08 1650 5/7/2020 MW8i 523 5/6/2020 MW19 1000

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Table9GroundwaterData SampleDate WellID Tritium (pCi/L) 3rdQuarter2020 8/5/2020 DewatA 3030 8/5/2020 MW01 965 8/5/2020 MW02 1190 8/5/2020 MW02i 321 8/5/2020 MW03 899 8/4/2020 MW04 221 8/4/2020 MW07 2390 8/5/2020 MW08 1130 8/5/2020 MW8i 494 8/4/2020 MW19 866 4thQuarter2020 11/16/2020 DewatA 3050 12/14/2020 DewatA 5010 11/19/2020 MW01 2200 11/19/2020 MW02 1090 11/19/2020 MW03 755 11/19/2020 MW04 266 11/19/2020 MW07 2450 10/22/2020 MW08 891 11/19/2020 MW08 787 12/14/2020 MW08 643 11/19/2020 MW8i 500 12/14/2020 MW08i 2190 11/18/2020 MW11 299 11/19/2020 MW19 910

N. Errata/CorrectionstoPreviousARERRs Therearenoerrata/correctionsmadetopreviousARERRs.

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II.

GaseousEffluents

Table1AGaseousEffluentsSummationofallReleases

1Includesactivityfromabnormalreleases.Dilutionflowwasnotdeterminedforallabnormalreleases.

ApplicableLimitsareexpressedintermsofdose.ReferenceSectionV,RadiologicalImpact.

Units 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Total Est.Total Error A.FissionandActivationGases

1.TotalRelease Ci 5.51E+01 1.17E+01 7.51E+00 2.35E+00 7.66E+01

+/-45%

2.AverageReleaseRateforPeriod uCi/sec 7.00E+00 1.48E+00 9.45E01 2.95E01 2.42E+00 3.PercentofTechSpecLimit B.Iodines

1.TotalRelease Ci 5.90E04 4.74E04 1.17E03 4.21E04 2.66E03

+/-36%

2.AverageReleaseRateforPeriod uCi/sec 7.50E05 6.03E05 1.48E04 5.29E05 8.41E05 3.PercentofTechSpecLimit C.Particulates

1.TotalRelease Ci 5.22E04 6.76E04 4.14E04 5.26E04 2.14E03

+/-35%

2.AverageReleaseRateforPeriod uCi/sec 6.63E05 8.60E05 5.21E05 6.62E05 6.76E05 3.PercentofTechSpecLimit D.Tritium1

1.TotalRelease Ci 1.62E+02 1.23E+02 1.04E+02 9.35E+01 4.83E+02

+/-21%

2.AverageReleaseRateforPeriod uCi/sec 2.06E+01 1.57E+01 1.31E+01 1.18E+01 1.53E+01 3.PercentofTechSpecLimit E.GrossAlpha

1.TotalRelease Ci

<LLD

<LLD NA 2.AverageReleaseRateforPeriod uCi/sec

<LLD

<LLD 3.PercentofTechSpecLimit F.Carbon14

1.TotalCO2Release Ci 1.20E+01 1.30E+01 1.28E+01 1.20E+01 4.98E+01 NA 2.TotalCarbonRelease Ci 1.27E+01 1.36E+01 1.35E+01 1.27E+01 5.25E+01 3.PercentofTechSpecLimit

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Table1BGaseousEffluents-GroundLevelReleases(Batch)

Units 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Total 1.FissionandActivationGases

Kr85 Ci

<LLD

<LLD Kr85m Ci

<LLD

<LLD Kr87 Ci

<LLD

<LLD Kr88 Ci

<LLD

<LLD Xe133 Ci

<LLD

<LLD Xe135m Ci

<LLD

<LLD Xe138 Ci

<LLD

<LLD TotalForPeriod Ci

<LLD

<LLD 2.Iodines

I131 Ci

<LLD

<LLD I133 Ci

<LLD

<LLD I135 Ci

<LLD

<LLD TotalForPeriod Ci

<LLD

<LLD 3.Particulates

Na24 Ci

<LLD

<LLD Mn54 Ci

<LLD

<LLD Co58 Ci

<LLD

<LLD Co60 Ci

<LLD

<LLD Zn65 Ci

<LLD

<LLD Sr89 Ci

<LLD

<LLD Sr90 Ci

<LLD

<LLD Ag110m Ci

<LLD

<LLD Cs134 Ci

<LLD

<LLD Cs137 Ci

<LLD

<LLD Ba140 Ci

<LLD

<LLD La140 Ci

<LLD

<LLD TotalForPeriod Ci

<LLD

<LLD 4.GrossAlpha

GrossAlpha Ci

<LLD

<LLD 5.Tritium

H3 Ci

<LLD

<LLD 6.Carbon14

C14 Ci

<LLD

<LLD I

I I

I

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Table1BGaseousEffluents-GroundLevelReleases(Continuous)

Units 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Total 1.FissionandActivationGases

Kr85 Ci

<LLD

<LLD Kr85m Ci

<LLD

<LLD Kr87 Ci

<LLD

<LLD Kr88 Ci

<LLD

<LLD Xe133 Ci

<LLD

<LLD Xe135m Ci

<LLD

<LLD Xe138 Ci

<LLD

<LLD TotalForPeriod Ci

<LLD

<LLD 2.Iodines

I131 Ci 4.20E05 3.28E06 1.55E06 2.07E06 4.89E05 I133 Ci 4.00E05

<LLD

<LLD 4.00E05 I135 Ci

<LLD

<LLD TotalForPeriod Ci 8.21E05 3.28E06 1.55E06 2.07E06 8.90E05 3.Particulates

Na24 Ci

<LLD

<LLD Mn54 Ci

<LLD 4.77E06

<LLD

<LLD 4.77E06 Co58 Ci

<LLD 2.47E06

<LLD

<LLD 2.47E06 Co60 Ci

<LLD 2.12E05 1.56E05 1.70E06 3.86E05 Zn65 Ci

<LLD

<LLD Sr89 Ci

<LLD

<LLD Sr90 Ci

<LLD

<LLD Nb95 Ci

<LLD 1.99E06

<LLD

<LLD 1.99E06 Ag110m Ci

<LLD

<LLD Cs134 Ci

<LLD

<LLD Cs137 Ci

<LLD

<LLD Ba140 Ci

<LLD

<LLD La140 Ci

<LLD

<LLD TotalForPeriod Ci

<LLD 3.05E05 1.56E05 1.70E06 4.789E05 4.GrossAlpha

GrossAlpha Ci

<LLD

<LLD 5.Tritium

H3 Ci 4.49E+01 3.03E+01 2.06E+01 3.06E+01 1.26E+02 6.Carbon14

C14 Ci

<LLD

<LLD I

I I

I

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Table1CGaseousEffluents-ElevatedReleases(Batch)

Units 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Total 1.FissionandActivationGases

Kr85 Ci

<LLD

<LLD Kr85m Ci

<LLD

<LLD Kr87 Ci

<LLD

<LLD Kr88 Ci

<LLD

<LLD Xe133 Ci

<LLD

<LLD Xe135m Ci

<LLD

<LLD Xe138 Ci

<LLD

<LLD TotalForPeriod Ci

<LLD

<LLD 2.Iodines

I131 Ci

<LLD

<LLD I133 Ci

<LLD

<LLD I135 Ci

<LLD

<LLD TotalForPeriod Ci

<LLD

<LLD 3.Particulates

Na24 Ci

<LLD

<LLD Mn54 Ci

<LLD

<LLD Co58 Ci

<LLD

<LLD Co60 Ci

<LLD

<LLD Zn65 Ci

<LLD

<LLD Sr89 Ci

<LLD

<LLD Sr90 Ci

<LLD

<LLD Ag110m Ci

<LLD

<LLD Cs134 Ci

<LLD

<LLD Cs137 Ci

<LLD

<LLD Ba140 Ci

<LLD

<LLD La140 Ci

<LLD

<LLD TotalForPeriod Ci

<LLD

<LLD 4.GrossAlpha

GrossAlpha Ci

<LLD

<LLD 5.Tritium

H3 Ci

<LLD 3.78E03

<LLD

<LLD 3.78E03 6.Carbon14

C14 Ci

<LLD

<LLD I

I I

I

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Table1CGaseousEffluents-ElevatedReleases(Continuous)

Units 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Total 1.FissionandActivationGases

Ar41 Ci 1.44E+01 7.38E+00 4.51E+00 2.35E+00 2.86E+01 Kr85m Ci 2.75E+00

<LLD

<LLD 2.75E+00 Kr85 Ci

<LLD

<LLD Kr87 Ci 6.15E+00 1.21E+00 3.64E01

<LLD 7.72E+00 Kr88 Ci 1.99E+01 2.42E+00 2.17E+00

<LLD 2.44E+01 Xe133 Ci 1.14E+01 1.95E01

<LLD

<LLD 1.16E+01 Xe135 Ci 5.91E01 4.57E01 4.68E01

<LLD 1.52E+00 Xe135m Ci

<LLD

<LLD Xe138 Ci

<LLD

<LLD TotalForPeriod Ci 5.51E+01 1.17E+01 7.51E+00 2.35E+00 7.66E+01 2.Iodines

I131 Ci 1.65E04 9.59E05 1.62E04 4.70E05 4.70E04 I133 Ci 2.61E04 2.64E04 4.78E04 8.54E05 1.09E03 I135 Ci

<LLD

<LLD TotalForPeriod Ci 4.25E04 3.60E04 6.41E04 1.32E04 1.56E03 3.Particulates

Na24 Ci

<LLD

<LLD Mn54 Ci

<LLD

<LLD Co58 Ci

<LLD

<LLD Co60 Ci

<LLD

<LLD 4.07E06

<LLD 4.07E06 Zn65 Ci

<LLD

<LLD Sr89 Ci 1.29E05 6.09E06 9.89E06 1.20E05 4.09E05 Sr90 Ci

<LLD

<LLD Ag110m Ci

<LLD

<LLD Cs134 Ci

<LLD

<LLD Cs137 Ci

<LLD

<LLD Ba140 Ci

<LLD

<LLD 5.22E06 5.22E06 La140 Ci

<LLD

<LLD 1.21E05 1.21E05 Au199 Ci 2.30E04 1.09E04 1.52E04 2.84E04 7.75E04 TotalForPeriod Ci 2.43E04 1.15E04 1.66E04 3.14E04 8.37E04 4.GrossAlpha

GrossAlpha Ci

<LLD

<LLD 5.Tritium

H3 Ci 3.98E+01 1.64E+01 1.08E+01 8.07E+00 7.50E+01 6.Carbon14

C14 Ci 1.20E+01 1.30E+01 1.28E+01 1.20E+01 4.98E+01 I

I I

I

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Table1DGaseousEffluents-MixedModeReleases(Batch)

Units 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Total 1.FissionandActivationGases

Kr85 Ci

<LLD

<LLD Kr85m Ci

<LLD

<LLD Kr87 Ci

<LLD

<LLD Kr88 Ci

<LLD

<LLD Xe133 Ci

<LLD

<LLD Xe135m Ci

<LLD

<LLD Xe138 Ci

<LLD

<LLD TotalForPeriod Ci

<LLD

<LLD 2.Iodines

I131 Ci

<LLD

<LLD I133 Ci

<LLD

<LLD I135 Ci

<LLD

<LLD TotalForPeriod Ci

<LLD

<LLD 3.Particulates

Na24 Ci

<LLD

<LLD Mn54 Ci

<LLD

<LLD Co58 Ci

<LLD

<LLD Co60 Ci

<LLD

<LLD Zn65 Ci

<LLD

<LLD Sr89 Ci

<LLD

<LLD Sr90 Ci

<LLD

<LLD Ag110m Ci

<LLD

<LLD Cs134 Ci

<LLD

<LLD Cs137 Ci

<LLD

<LLD Ba140 Ci

<LLD

<LLD La140 Ci

<LLD

<LLD TotalForPeriod Ci

<LLD

<LLD 4.GrossAlpha

GrossAlpha Ci

<LLD

<LLD 5.Tritium

H3 Ci 2.19E03 5.75E03 2.85E03 2.23E03 1.30E02 6.Carbon14

C14 Ci

<LLD

<LLD I

I I

I

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Table1DGaseousEffluents-MixedModeReleases(Continuous)

Units 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Total 1.FissionandActivationGases

Kr85 Ci

<LLD

<LLD Kr85m Ci

<LLD

<LLD Kr87 Ci

<LLD

<LLD Kr88 Ci

<LLD

<LLD Xe133 Ci

<LLD

<LLD Xe135m Ci

<LLD

<LLD Xe138 Ci

<LLD

<LLD TotalForPeriod Ci

<LLD

<LLD 2.Iodines

I131 Ci 6.38E05 2.35E06 9.49E05 5.07E05 2.12E04 I133 Ci 1.88E05 1.09E04 4.37E04 2.35E04 8.00E04 I135 Ci

<LLD

<LLD TotalForPeriod Ci 8.26E05 1.11E04 5.32E04 2.86E04 1.01E03 3.Particulates

Na24 Ci

<LLD

<LLD Cr51 Ci 1.23E04 4.46E05

<LLD 2.33E05 1.91E04 Mn54 Ci 3.88E06 5.71E06 6.12E06 6.04E06 2.18E05 Co58 Ci 5.09E06 2.41E06

<LLD 2.90E06 1.04E05 Co60 Ci 1.13E04 1.18E04 7.87E05 9.07E05 4.00E04 Zn65 Ci

<LLD

<LLD 2.05E06 2.05E06 Se75 Ci 7.42E07 1.55E06

<LLD 4.91E06 7.20E06 As76 Ci

<LLD 3.31E04 1.47E04 5.91E05 5.37E04 Sr89 Ci

<LLD

<LLD Sr90 Ci

<LLD

<LLD Nb95 Ci

<LLD 3.83E06

<LLD

<LLD 3.83E06 Ag110m Ci 3.23E05 2.44E05 3.99E07 2.16E05 7.87E05 Cs134 Ci

<LLD

<LLD Cs137 Ci

<LLD

<LLD Ba140 Ci

<LLD

<LLD La140 Ci

<LLD

<LLD TotalForPeriod Ci 2.78E04 5.31E04 2.32E04 2.11E04 1.25E03 4.GrossAlpha

GrossAlpha Ci

<LLD

<LLD 5.Tritium

H3 Ci 7.71E+01 7.67E+01 7.28E+01 5.48E+01 2.81E+02 6.Carbon14

C14 Ci

<LLD

<LLD I

I I

I

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III.

LiquidEffluents

Table2ALiquidEffluentsSummationofallReleases

1Includesactivityfromabnormalreleases.Dilutionflowwasnotdeterminedforallabnormalreleases.

ApplicableLimitsareexpressedintermsofdose.ReferenceSectionV,RadiologicalImpact.

Units 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Total Est.Total Error A.FissionandActivationProducts

1.TotalRelease Ci 1.08E02 5.63E03 1.00E02 9.93E03 3.63E02

+/-9%

2.AverageDilutedConcentration uCi/mL 1.08E09 2.67E10 1.76E09 3.96E10 8.76E10 3.PercentofTechSpecLimit B.Tritium1

1.TotalRelease Ci 1.66E+01 1.43E+01 5.05E+00 1.23E+01 4.83E+01

+/-6%

2.AverageDilutedConcentration uCi/mL 1.67E06 6.68E07 8.92E07 4.91E07 9.30E07 3.PercentofTechSpecLimit C.DissolvedandEntrainedNobleGases

1.TotalRelease Ci 9.77E05 4.40E06 2.32E05 3.16E05 1.57E04

+/-8%

2.AverageDilutedConcentration uCi/mL 9.83E12 2.09E13 4.09E12 1.26E12 3.85E12 3.PercentofTechSpecLimit D.GrossAlphaRadioactivity

1.TotalRelease Ci

<LLD

+/-48%

2.AverageReleaseRateforPeriod uCi/mL

<LLD

<LLD 3.PercentofTechSpecLimit

E.VolumeofLiquidWasteto DischargeCanal(priortodilution)

Liters 1.29E+06 1.44E+06 7.42E+05 1.93E+06 5.41E+06

+/-3%

F.VolumeofDilutionWaterfor Period Liters 9.94E+09 2.11E+10 5.67E+09 2.51E+10 6.18E+10

+/-10%

G.TotalCCW Gigagal 2.14E+02 2.61E+02 2.72E+02 2.52E+02 9.99E+02 NA

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Table2BLiquidEffluents-BatchMode

Table2BLiquidEffluents-ContinuousMode

Units 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Total 1.FissionandActivationProducts

F18 Ci 1.16E05 3.64E06 1.20E05

<LLD 2.72E05 Na24 Ci 2.18E05

<LLD

<LLD 2.18E05 Cr51 Ci 7.76E05

<LLD

<LLD 7.76E05 Mn54 Ci 1.07E03 6.98E04 1.32E03 1.16E03 4.25E03 Fe55 Ci 1.14E03 4.83E05 1.08E03

<LLD 2.27E03 Co58 Ci 5.49E04 6.12E05 1.30E04 3.43E04 1.08E03 Co60 Ci 5.99E03 3.89E03 6.03E03 5.20E03 2.11E02 Zn65 Ci 1.15E03 6.96E04 3.96E04 1.13E03 3.38E03 Sr89 Ci

<LLD

<LLD 1.01E04 2.26E04 3.27E04 Sr90 Ci

<LLD

<LLD 3.57E05

<LLD 3.57E05 Sr92 Ci

<LLD 5.39E06 1.05E05 8.85E06 2.48E05 Nb97 Ci 7.49E06 4.81E05 3.79E05 4.82E05 1.42E04 Ag110m Ci 5.48E04

<LLD 1.94E04 6.36E04 1.38E03 Cs137 Ci 1.89E04 1.72E04 6.50E04 1.18E03 2.19E03 La140 Ci

<LLD

<LLD 6.68E06

<LLD 6.68E06 TotalForPeriod Ci 1.08E02 5.63E03 1.00E02 9.93E03 3.63E02 2.DissolvedandEntrainedGases

Xe133 Ci 6.41E05

<LLD 1.82E05 5.02E06 8.73E05 Xe135 Ci 3.36E05 4.40E06 5.02E06 2.66E05 6.96E05 TotalForPeriod Ci 9.77E05 4.40E06 2.32E05 3.16E05 1.57E04

Units 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Total 1.FissionandActivationProducts

Co58 Ci

<LLD

<LLD Co60 Ci

<LLD

<LLD TotalForPeriod Ci

<LLD

<LLD 2.DissolvedandEntrainedGases

Xe133 Ci

<LLD

<LLD Xe135 Ci

<LLD

<LLD TotalForPeriod Ci

<LLD

<LLD I

I I

I

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IV.

SolidWasteStorageandShipment

A. SolidWasteShippedOffsiteforBurialorDisposal(NotIrradiatedFuel)

1.TypeofWaste

Units JanJun JulDec Error

a. Spentresins,filters,filtersludge

m3 1.89E+02 9.90E+01

+/-25%

evaporatorbottoms,etc.

Ci 2.25E+02 4.68E+01

+/-25%

b.

Drycompressiblewaste,contaminated m3 1.31E+03 9.51E+02

+/-25%

equipment,etc.

Ci 7.31E+00 3.34E+00

+/-25%

c.

Irradiatedcomponents,controlrod m3 0.00E+00 0.00E+00

+/-25%

blades&LPRMswithfissionchambers Ci0.00E+00 0.00E+00

+/-25%

d.

Other-CombinedPackages

m3 0.00E+00 0.00E+00

+/-25%

Ci 0.00E+00 0.00E+00

+/-25%

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2.Estimateofmajornuclidecomposition(bytypeofwaste)

a.Spentresins,filters,filtersludgeevaporatorbottoms,etc.

Nuclide Percentage Curies 1.

H3 0.81%

2.20E+00 2.

C14 0.16%

4.34E01 3.

Cr51 0.01%

3.76E02 4.

Mn54 7.11%

1.94E+01 5.

Fe55 18.07%

4.93E+01 6.

Co57 0.01%

3.58E02 7.

Co58 4.47%

1.22E+01 8.

Co60 46.62%

1.27E+02 9.

Ni59 0%

4.66E04 10.

Ni63 1%

2.73E+00 11.

Zn65 6.24%

1.70E+01 12.

Sr89 0.05%

1.30E01 13.

Sr90 0.03%

6.91E02 14.

Tc99 0.02%

4.09E02 15.

Ag110m 4.58%

1.25E+01 16.

Sb124 0.08%

2.11E01 17.

Cs134 0.04%

1.12E01 18.

Cs137 10.65%

2.90E+01 19.

Ce144 0.06%

1.70E01 20.

Pu238 0%

1.46E06 21.

Pu241 0%

3.59E05 22.

Am241 0%

3.36E04 23.

Cm242 0%

1.18E07 24.

Cm243 0%

2.72E07

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2.Estimateofmajornuclidecomposition(continued) b.Drycompressiblewaste,contaminatedequipment,etc.

Nuclide Percentage Curies 1.

H3 6.74%

7.18E01 2.

Cr51 0.85%

9.05E02 3.

Mn54 3.52%

3.75E01 4.

Fe55 29.61%

3.16E+00 5.

Co57 0%

2.93E04 6.

Co58 1.77%

1.89E01 7.

Co60 43.99%

4.69E+00 8.

Ni63 1.33%

1.41E01 9.

Zn65 2.55%

2.71E01 10.

Sr90 0.02%

1.93E03 11.

Zr95 0.06%

6.06E03 12.

Nb95 0.51%

5.45E02 13.

Tc99 0.01%

1.00E03 14.

Ag110m 2.63%

2.81E01 15.

Sb124 0.02%

2.57E03 16.

Sb125 0.34%

3.66E02 17.

Cs134 0.03%

3.60E03 18.

Cs137 6.01%

6.41E01

c.Irradiatedcomponents,controlrodblades&LPRMswithfissionchambers

Nuclide Percentage Curies

0 0

0

d.Other(combinedpackages)

Nuclide Percentage Curies

0 0

0

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3.SoldWasteDisposition

Numberof Shipments ModeofTransportation Destination 3

ESS(TVA)

TOXCO,Inc.

MaterialsManagementCenter 14 HittmanTransportServices EnergySolutionsLLC.(Clive)

CliveDisposalSiteContainerizedWaste Facility 7

HittmanTransportServices EnergySolutionsServicesInc.

1560BearCreekRoad 1

HittmanTransportServices WasteControlSpecialist,LLC CWF 1

HittmanTransportServices WCSTSDFacility TSDFacility 2

InterstateVentures,Inc.

TOXCO,Inc.

MaterialsManagementCenter 32 InterstateVentures,Inc.

WasteControlSpecialist,LLC CWF 8

InterstateVentures,Inc.

WCSTSDFacility TSDFacility 49 SpecialtyTransport,Inc.

UnitechServicesGroup,Inc.

OakRidgeServiceCenter

B. IrradiatedFuelShipments(Disposition)

Numberof Shipments ModeofTransportation Destination 0

NA NA

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V.

RadiologicalImpacttoMan A. Introduction Potentialdosestothe"maximumexposedindividual"andthepopulationaroundBrowns FerryNuclearPlant(BFN)arecalculatedforeachquarterasrequiredinSection5.2ofthe OffsiteDoseCalculationManual(ODCM).Themethodologyusedtoestimatedosefor determiningplantreleasesforthereportingperiodisspecifiedinSections6and7ofthe ODCM.Dispersionofradioactiveeffluentsintheenvironmentisestimatedusing meteorologicaldataandriverflowmeasuredduringtheperiod.Inthisreport,thedoses resultingfromreleasesaredescribedandcomparedtolimitsestablishedforBFN.

B. DoseLimits TheODCMspecifieslimitsforthereleaseofradioactiveeffluents,aswellaslimitsfor dosestothegeneralpublicfromthereleaseofradioactiveeffluents.Theselimitsaresetwell belowtheTechnicalSpecificationlimitswhichgoverntheconcentrationsofradioactivityand dosespermissibleinunrestrictedareas.ThisensuresthatradioactiveeffluentreleasesareAs LowAsReasonablyAchievable.

TheairdoselimitsinareasatandbeyondtheSiteBoundaryduetonoblegasesreleased ingaseouseffluentsperunitare:

5mradperquarterand10mradperyearforgammaradiation.

and 10mradperquarterand20mradperyearforbetaradiation.

Thedoselimitstoamemberofthepublicinanunrestrictedareafromradioiodines, radioactivematerialsinparticulateform,andradionuclidesotherthannoblegaseswithhalf lives>8daysreleasedingaseouseffluentsforeachunitare:

7.5mremperquarterand15mremperyeartoanyorgan.

Thedoseordosecommitmenttoamemberofthepublicfromradioactivematerialin liquideffluentsreleasedtounrestrictedareasare:

1.5mremperquarterand3mremperyeartothetotalbody, and 5mremperquarterand10mremperyeartoanyorgan.

Thelimitforthetotaleffectivedoseequivalenttoanindividualmemberofthepublic insidethesiteboundaryis:

100mremperyear.

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TheEnvironmentalProtectionAgencylimitsfortotaldosetoanymemberofthepublicin thevicinityofanuclearpowerplant,establishedintheEnvironmentalDoseStandardof40 CFR190,are:

25mremperyeartothewholebody,75mremperyeartothethyroid, and 25mremperyeartoanyotherorgan.

C. DoseCalculations Estimateddosestomembersofthepublicaredeterminedusingcomputermodels(the GaseousEffluentLicensingCode,andtheQuarterlyWaterDoseAssessmentCode(QWATA)).

ThesemodelsarebasedonguidanceprovidedbytheNuclearRegulatoryCommission(NRC) fordeterminingthepotentialdosetoindividualsandpopulationslivinginthevicinityofthe plant.Theareaaroundtheplantisanalyzedtodeterminethepathwaysthroughwhichthe publicmayreceiveadose.Thedosescalculatedarearepresentationofthedosetoa "maximumexposedindividual."Someofthefactorsusedinthesecalculations(suchas ingestionrates)aremaximumvaluestoensureconservativereportingofdata.Thevalues chosenwilltendtooverestimatethedose.Theexpecteddosetoactualindividualsislower.

ThecalculateddosesarepresentedinTables3,4,and5.

D. DosesfromAirborneEffluents Forairborneeffluents,membersofthepubliccanbeexposedtoradiationfromseveral sources:directradiationfromtheradioactivityintheair,directradiationfromradioactivity depositedontheground,inhalationofairborneradioactivity,ingestionofvegetationwhich containsradioactivitydepositedfromtheatmosphere,andingestionofmilkandbeefwhich containsradioactivitydepositedfromtheatmosphereontovegetationandsubsequently consumedbyanimals.

Releasesfromtheturbinebuildingareconsideredgroundlevelreleases.The groundlevelJointFrequencyDistribution(JFD)isderivedfromwindspeedsanddirections measured10.5metersabovethegroundandfromtheverticaltemperaturedifference between10.03and45.30meters,andarepresentedforeachquarterinSectionVI, MeteorologicalData,Tables6A,6B,6C,and6D.

Releasesfromtheradwasteandreactorbuildingsareconsideredsplitlevelreleases.

Portionsofthereleasearetreatedasgroundlevelwhileotherportionsareconsidered elevateddependingontheratiooftheverticalexitvelocitytothehorizontalwindspeed.

Thesplitleveldispersionapproachisimplementedusingamodelthatrequirestwocomplete quarterlyJFDsforeacheffluentvent,oneforthegroundlevelreleasesandoneforthe elevatedreleases.ThegroundlevelportionofthesplitlevelJFDisbasedonwindspeeds anddirectionsmeasured10.5metersabovegroundlevelandfromtheverticaltemperature differencebetween10.03and45.30meters.TheelevatedportionofthesplitlevelJFDis basedonwindspeedsanddirectionmeasurementsatthe45.74meterlevelandthevertical

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temperaturedifferencebetween10.03and89.59meters.BothoftheseJFDsaregivenfor eachquarterinSectionVI,MeteorologicalData,Tables7A,7B,7C,and7D.

Releasesfromthestackareconsideredtobeelevatedreleases.TheJFDsforelevated releasesarebasedonwinddirectionsandwindspeedsmeasuredat90.29metersandthe verticaltemperaturedifferencebetween10.03and89.59meters,andaregivenforeach quarterinSectionVI,MeteorologicalData,Table8A,8B,8C,and8D.

MeteorologicalvariablesatBFNaremeasuredcontinuously.Measurementscollected includewindspeedandwinddirectionatheightsof10.5,45.74,and90.29metersabovethe ground,andtemperatureatheightsof10.03,45.30,and89.59metersabovetheground.

QuarterlyJFDsarecalculatedforeachreleasepointusingtheappropriatelevelsof meteorologicaldata.AquarterlyJFDgivesthepercentageofthetimethatthewindis blowingoutofaparticularupwindcompasssectorinaparticularrangeofwindspeedsfora givenstabilityclassAthroughG.Thewindspeedsaredividedintoninewindspeedranges.

Calmsaredistributedbydirectioninproportiontothedistributionofnoncalmwind directionslessthan1.6m/s(3.5mph).Stabilityclassesaredeterminedfromthevertical temperaturedifferencebetweentwomeasurementlevels.

ThegenerallyopenterrainaroundBFNdoesnotcauseanysignificanteffectsonthe transportanddispersionofgaseouseffluentsfromtheplant.Within30kilometersofBFN, theterrainismostlygentlyrollinghills(3060meters).Between30and80kilometers,the hillsbecomelargertothenorthandsouthandmountainoustotheeastandnortheast.The TennesseeRiver/WheelerLakemayhaveaminoreffectontransportanddispersioninthe immediatevicinityofBFNduringperiodsofwindswithasoutherlycomponent,overcast skies,andrelativelyhighwindspeeds.Also,thelowerlayer(1045meters)stabilityclass tendstobemorestable.However,duringthisinfrequentcondition,doseestimateswillbe conservative.

Dosecalculatedformaximumexternalairdose(gammaairandbetaair)aremadefor pointsatandbeyondtheunrestrictedareaboundaryasdescribedintheBFNODCM.The highestofthesedosesisthenselected.

Externaldosestotheskinandtotalbody,duetosubmersioninacloudofnoblegases,are calculatedforthenearestresidenceineachsector.Theresidencewiththehighestdoseis thenselectedfromallsectors.

Dosetoanorganduetoreleasesofairborneeffluentsareestimatedfortheinhalation, groundcontamination,andingestionpathways.Theingestionpathwayisfurtherdividedinto threepossiblecontributingpathways:ingestionofcow/goatmilk,ingestionofbeef,and ingestionofvegetables.Dosesfromapplicablepathwaysarecalculatedforeachreceptor locationidentifiedinthemostrecentlandusesurvey.Todeterminethemaximumorgan dose,thedosesfromthepathwaysaresummedforeachreceptor.However,forthe

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ingestiondose,onlythosepathwaysthatexistforeachreceptorareconsideredinthesum, e.g.,milkingestiondosesareincludedonlyforlocationswheremilkwasconsumedwithout commercialpreparationandvegetableingestionisincludedonlyforthoselocationswherea gardenwasidentified.Toconservativelyaccountforbeefingestion,abeefingestiondose equaltothatforthehighestunrestrictedareaboundarylocationisaddedtoeachidentified receptor.Forgroundcontamination,thedoseaddedtotheorgandosebeingcalculatedis thetotalbodydosecalculatedforthatlocation,i.e.,itisassumedthatthedosetoan individualorganisequaltothetotalbodydose.

Themaximumorgandose,thyroiddose,andtotalbodydosefromairborneeffluentsare presentedinTable3.

E. DosesfromLiquidEffluents Forliquideffluents,thepubliccanbeexposedtoradiationfromthreesources:the ingestionofwaterfromtheTennesseeRiver,theingestionoffishcaughtintheTennessee River,anddirectexposurefromradioactivematerialdepositedontherivershoreline sediment(recreation).TheconcentrationofradionuclidesintheTennesseeRiveris calculatedbyacomputermodelwhichusesmeasuredhydraulicdatadownstreamofBFN.

ParametersusedtodeterminethedosesarebasedonguidancegivenbytheNRCfor maximumingestionrates,exposuretimes,etc.

Whereverpossible,parametersusedinthedosecalculationaresitespecific.Themodels thatareusedtoestimatedoses,aswellastheparametersinputtothemodels,aredescribed indetailintheBFNODCM.

RadionuclideconcentrationsintheTennesseeRiverarecalculatedassumingthatreleases inliquideffluentsarecontinuous.Whennecessary,liquidreleasesfromBFN,locatedat TennesseeRiverMile294,aremadethroughdiffuserswhichextendintotheTennessee River.Itisassumedthatreleasestotheriverthroughthesediffuserswillinitiallybe entrainedinonefifthofthewaterwhichflowspasttheplant.TheQWATAcodemakesthe assumptionthatthismixingconditionholdstrueuntilthewateriscompletelymixedatthe firstdownstreamdam(WheelerDam),atTennesseeRiverMile283.

Dosesarecalculatedforlocationswithina50mileradiusdownstreamoftheplantsite.

Themaximumpotentialrecreationdoseiscalculatedforalocationimmediatelydownstream fromtheplantsreleasepoint.Themaximumexposedindividualdosefromingestionoffish isassumedtobethatcalculatedfortheconsumptionoffishcaughtanywherebetweenthe plantandthefirstdownstreamdam.Themaximumexposedindividualdosefromdrinking waterisassumedtobethatcalculatedatthenearestdownstreampublicwatersupply[West MorganEastLawrence(WMEL)].Thiscouldbeinterpretedasindicatingthatthemaximum exposedindividual,asassumedforliquidreleasesfromBFN,isanindividualwhoobtainsall drinkingwateratWMEL,consumesfishcaughtfromtheTennesseeRiverbetweenBFNand WheelerDam,andspends500hoursperyearontheshorelinejustdownstreamofthe

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plantsreleasepoint.Dosescalculatedforthemaximumexposedindividualduetoliquid effluentsforeachquarterintheperiodarepresentedinTable4alongwiththeaverageriver flowspasttheplantsitefortheperiods.

F. PopulationDoses Populationdosesduetoairborneeffluentsarecalculatedforpeoplelivingwithina 50mileradiusoftheplantsite.Dosesfromexternalpathwaysandinhalationarebasedon the50milehumanpopulationdistribution.Ingestionpopulationdosesarecalculated assumingthateachindividualconsumedmilk,vegetables,andmeatproducedwithinthe sectorinwhichtheindividualresides.

Populationdosesduetoliquideffluentsarecalculatedfortheentiredownstream TennesseeRiverpopulation.Wateringestionpopulationdosesarecalculatedusingactual populationfiguresfordownstreampublicwatersupplies.Fishingestionpopulationdosesare calculatedassumingthatallsportfishcaughtintheTennesseeRiverareconsumedbythe TennesseeRiverpopulation.Recreationpopulationdosesarecalculatedusinghistorical recreationaldataonthenumberofshorelinevisitsatdownstreamlocations.

PopulationdosescalculatedforairborneandliquideffluentsarepresentedinTables3 and4.

G. OffsiteDirectRadiationDose Externalgammaradiationlevelsweremeasuredbyenvironmentaldosimetersdeployed aroundBFNaspartoftheoffsiteRadiologicalEnvironmentalMonitoringProgram(REMP).

Theresultsforenvironmentaldosimetermeasurementsarenormalizedtoastandard quarter(91days).Themonitoringlocationsaregroupedaccordingtothedistancefromthe plant.Thefirstgroupconsistsofallmonitoringpointswithin2milesoftheplant.Thesecond groupismadeupofalllocationsgreaterthan2milesfromtheplant.Pastdatahaveshown thattheaverageresultsfromthelocationsmorethan2milesfromtheplantareessentially thesame.Therefore,forpurposesofthisreport,monitoringpoints2milesorlessfromthe plantareidentifiedasonsitestationsandlocationsgreaterthan2milesareconsidered offsitestations.Thequarterlygammaradiationlevelsdeterminedfromthesedosimeters deployedaroundBFNin2020averagedapproximately18.2mrem/quarteratonsitestations andapproximately16.0mrem/quarteratoffsitestations.Theonsitestationsare approximately2.2mrem/quarterhigherthanatoffsitestations.Thisdifferenceisconsistent withlevelsmeasuredforpreoperationalandconstructionphasesatBFNwheretheaverage radiationlevelsonsiteweregenerally26mrem/quarterhigherthanthelevelsoffsite.This maybeattributedtonaturalvariationsinenvironmentalradiationlevels,earthmoving activitiesonsite,themassofconcreteemployedintheconstructionoftheplants,orother undeterminedinfluences.Fluctuationsinnaturalbackgrounddoseratesandindosimeter readingstendtomaskanysmallincrementswhichmaybeduetoplantoperations.Thus, therewasnoidentifiableincreaseindoseratelevelsattributabletodirectradiationfrom plantequipmentand/orgaseouseffluents.

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H. DosetoaMemberofthePublicInsidetheSiteBoundary PursuanttoODCMSection7.7.5,areviewwasperformedtodeterminethehighestdose toamemberofthepublicinthesiteboundary.Thedosetoamemberofthepublicconsists ofthesumofdosecommitmentsfromeffluentreleasesaswellasanydirectradiationdose.

Thegaseouseffluentdosecommitmentisnegligiblecomparedtothedirectradiationdose.

Thedirectradiationdosewasdeterminedfromareaenvironmentaldosimeterslocated onsite.Itconsistedofgammadosefromtheplume,groundcontamination,andfrom equipmentsources(i.e.,tanks,turbineshine,radioactivematerialstorageareas,etc.).The criticallocationwasdeterminedtobeanOpticallyStimulatedLuminescence(OSL)dosimeter neartheLivewellCenter(SE1).ThedirectradiationdoseattheLivewellCenter,accounting forbackgroundandoccupancy,wasapproximately0.7mrem/quarterduring2020.

Thetotalannualdosecommitmenttoamemberofthepublicfor2020was2.8mrem.It canbeconcludedthatthedoselimitforamemberofthepublicatthesiteboundaryas specifiedin10CFR20.1301wasnotexceeded.

I. TotalDose Todeterminecompliancewith40CFR190,annualtotaldosecontributionstothe maximumexposedindividualfromBFNradioactiveeffluentsandallothernearbyuranium fuelcyclesourcesareconsidered.

Theannualdosetoanyorganotherthanthethyroidforthemaximumexposedindividual isconservativelycalculatedbysummingthefollowingdoses:thetotalbodyairsubmersion doseforeachquarter,thecriticalorgandose(foranyorganotherthanthethyroid)from airborneeffluentsforeachquarterfromgroundcontamination,inhalationandingestion,the totalbodydosefromliquideffluentsforeachquarter,themaximumorgandose(forany organotherthanthethyroid)fromliquideffluentsforeachquarter,andanyidentifiable increaseindirectradiationdoselevelsasmeasuredbytheREMP.Thisdoseiscomparedto the40CFR190limitfortotalbodyoranyorgandose(otherthanthethyroid)todetermine compliance.

Theannualthyroiddosetothemaximumexposedindividualisconservativelyestimated bysummingthefollowingdoses:thetotalbodyairsubmersiondoseforeachquarter,the thyroiddosefromairborneeffluentsforeachquarter,thetotalbodydosefromliquid effluentsforeachquarter,thethyroiddosefromliquideffluentsforeachquarter,andany identifiableincreaseindirectradiationdoselevelsasmeasuredbytheREMP.Thisdoseis comparedtothe40CFR190limitforthyroiddosetodeterminecompliance.

TotaldosefromthefuelcycleispresentedinTable5.

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J. Tables

Table3ADosesfromAirborneEffluents-1stQuarter IndividualDoses Pathway Dose QuarterlyLimit PercentofLimit Location BetaAir 4.18E05mrad 10mrad

<1%

NNW7400meters GammaAir 1.11E04mrad 5mrad

<1%

NNW7400meters NGSkin 4.59E04mrad NA NA NNW1650meters NGTotalBody 3.81E04mrad NA NA NNW1650meters OrganDoses (Iodine,Tritium,Particulateswith>8Dayhalflife)

Child/Thyroid 2.53E02mrem 7.5mrem

<1%

NNW4350meters Child/TotalBody 2.51E02mrem 7.5mrem

<1%

NNW4350meters Child/Bone 3.59E02mrem 7.5mrem

<1%

NNW4350meters

PopulationDoses TotalBodyDose 2.39E01manrem MaximumOrganDose(Organ) 7.92E01manrem(Bone)

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Table3BDosesfromAirborneEffluents-2ndQuarter IndividualDoses Pathway Dose QuarterlyLimit PercentofLimit Location BetaAir 1.72E05mrad 10mrad

<1%

N5300meters GammaAir 4.46E05mrad 5mrad

<1%

N5300meters NGSkin 4.15E04mrad NA NA E1410meters NGTotalBody 3.53E04mrad NA NA E1410meters OrganDoses (Iodine,Tritium,Particulateswith>8Dayhalflife)

Child/Thyroid 1.41E02mrem 7.5mrem

<1%

E1530meters Child/TotalBody 1.41E02mrem 7.5mrem

<1%

E1530meters Child/Bone 3.42E02mrem 7.5mrem

<1%

N6200

PopulationDoses TotalBodyDose 2.59E01manrem MaximumOrganDose(Organ) 9.45E01manrem(Bone)

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Table3CDosesfromAirborneEffluents-3rdQuarter IndividualDoses Pathway Dose QuarterlyLimit PercentofLimit Location BetaAir 1.30E05mrad 10mrad

<1%

NE5000meters GammaAir 3.97E05mrad 5mrad

<1%

NE5000meters NGSkin 3.49E04mrad NA NA E1410meters NGTotalBody 2.92E04mrad NA NA E1410meters OrganDoses (Iodine,Tritium,Particulateswith>8Dayhalflife)

Child/Thyroid 1.48E02mrem 7.5mrem

<1%

E1530meters Child/TotalBody 1.45E02mrem 7.5mrem

<1%

E1530meters Child/Bone 4.34E02mrem 7.5mrem

<1%

NNW4350

PopulationDoses TotalBodyDose 2.65E01manrem MaximumOrganDose(Organ) 1.08E+00manrem(Bone)

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Table3DDosesfromAirborneEffluents-4thQuarter IndividualDoses Pathway Dose QuarterlyLimit PercentofLimit Location BetaAir 2.55E06mrad 10mrad

<1%

WNW5500meters GammaAir 7.24E06mrad 5mrad

<1%

WNW5500meters NGSkin 2.53E04mrad NA NA NNW1650meters NGTotalBody 2.14E04mrad NA NA NNW1650meters OrganDoses(Iodine,Tritium,Particulateswith>8Dayhalflife)

Child/Thyroid 1.26E02mrem 7.5mrem

<1%

NNW4350meters Child/TotalBody 1.25E02mrem 7.5mrem

<1%

NNW4350meters Child/Bone 2.77E02mrem 7.5mrem

<1%

NNW4350meters

PopulationDoses TotalBodyDose 2.17E01manrem MaximumOrganDose(Organ) 7.84E01manrem(Bone)

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Table4ADosesfromLiquidEffluents-1stQuarter IndividualDoses AgeGroup Organ Dose QuarterlyLimit PercentofLimit Child TotalBody 1.30E04mrem 1.5mrem

<1%

Child Liver 1.60E04mrem 5mrem

<1%

Child Thyroid 1.20E04mrem 5mrem

<1%

AverageRiverFlowpastBFN:139,814CFS

PopulationDoses TotalBodyDose 8.30E03manrem MaximumOrganDose(Organ) 8.50E03manrem(Liver)

Table4BDosesfromLiquidEffluents-2ndQuarter IndividualDoses AgeGroup Organ Dose QuarterlyLimit PercentofLimit Child TotalBody 2.00E04mrem 1.5mrem

<1%

Child Liver 2.40E04mrem 5mrem

<1%

Child Thyroid 1.80E04mrem 5mrem

<1%

AverageRiverFlowpastBFN:68,140CFS

PopulationDoses TotalBodyDose 1.20E02manrem MaximumOrganDose(Organ) 1.20E02manrem(Liver)

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Table4CDosesfromLiquidEffluents-3rdQuarter IndividualDoses AgeGroup Organ Dose QuarterlyLimit PercentofLimit Adult TotalBody 6.80E04mrem 1.5mrem

<1%

Child Bone 8.80E04mrem 5mrem

<1%

Child Thyroid 4.20E04mrem 5mrem

<1%

AverageRiverFlowpastBFN:29,455CFS

PopulationDoses TotalBodyDose 3.90E02manrem MaximumOrganDose(Organ) 4.00E02manrem(Bone)

Table4DDosesfromLiquidEffluents-4thQuarter IndividualDoses AgeGroup Organ Dose QuarterlyLimit PercentofLimit Adult TotalBody 4.70E04mrem 1.5mrem

<1%

Child Bone 6.20E04mrem 5mrem

<1%

Child Thyroid 2.50E04mrem 5mrem

<1%

AverageRiverFlowpastBFN:57,905CFS

PopulationDoses TotalBodyDose 2.00E02manrem MaximumOrganDose(Organ) 2.10E02manrem(Liver)

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Table4ETotalDosefromI131WaterIngestion IndividualDoses

Quarter 1

2 3

4 Total I131(Ci)

<LLD

<LLD Thyroid(mrem)

NA NA NA NA NA Population/

Thyroid(mrem)

NA NA NA NA NA

TheREMPrequirementsasspecifiedinTable3.121fromNUREG1302,OffsiteDose CalculationManualGuidance:StandardRadiologicalEffluentControlsforBoilingWaterReactors,dated April1991,requiresanI131specificanalysisfordrinkingwaterpathwaysamplesiftheannualdose fromI131isgreaterthan1mrem.Inordertoevaluatetheneedforimplementationofthisadditional analysis,thedrinkingwaterpathwaydosefromI131tothemaximumorganandagegroupis calculated.BasedonTable4E,theperformanceoftheI131specificanalysisisnotrequiredforBFN REMPdrinkingwatersamples,asI131wasnotidentifiedinanyliquideffluentfromtheplant.

Table4FTotalDosefromGroundwater IndividualDoses

Quarter 1

2 3

4 Total Tritium(Ci) 4.43E07 4.43E07 4.43E07 4.43E07 1.77E06 Child(mrem) 1.20E12 2.50E12 5.80E12 3.00E12 1.25E11 Population (mrem) 1.90E11 4.10E11 9.20E11 4.70E11 1.99E10

Asdeterminedinthe2006Groundwaterstudy,theestimatedgroundwater/channelwater dilutionratiois1:20,000atarateofapproximately0.5gpm.Usingthehighestmeasuredgroundwater tritiumconcentrationin2020,35,400pCi/L,theaqueoustritiumconcentrationinthechannel,after dilution,wouldbe1.77E09uCi/mL.Assuming1.77E09uCi/mLconcentrationatareleaserateof0.5 gpmfortheentireyearresultsinatotalreleaseofapproximately1.77E06Curies.Thecalculated hypotheticaldosetothemaximumexposedmemberofthepublicwouldbe1.25E11mrem(reference Table4F).

Thecalculatedhypotheticalannualdosetoamaximumexposedmemberofthepublicislessthan 1mrem.

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Table5TotalDosefromFuelCycle Dose First Quarter Second Quarter Third Quarter Fourth Quarter

TotalBodyoranyOrgan(exceptthyroid)

Totalbodyair (submersion) 3.81E04 3.53E04 2.92E04 2.14E04 Criticalorgan dose(airborne) 3.59E02 3.42E02 4.34E02 2.77E02 Totalbodydose (liquid) 1.30E04 2.00E04 6.80E04 4.70E04 Maximumorgan dose(liquid) 1.60E04 2.40E04 8.80E04 6.20E04 DirectRadiation Dose 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Total 3.66E02 3.50E02 4.53E02 2.90E02 CumulativeTotalDose(mrem) 1.46E01 AnnualDoseLimit(mrem) 2.5E+01 PercentofLimit <1%

Thyroid

Totalbodyair (submersion) 3.81E04 3.53E04 2.92E04 2.14E04 Thyroiddose (airborne) 2.53E02 1.41E02 1.48E02 1.26E02 Totalbodydose (liquid) 1.30E04 2.00E04 6.80E04 4.70E04 Thyroiddose (liquid) 1.20E04 1.80E04 4.20E04 2.50E04 Total 2.59E02 1.48E02 1.62E02 1.35E02 CumulativeTotalDose(mrem) 7.05E02 AnnualDoseLimit(mrem) 7.5E+01 PercentofLimit <1%

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VI.

MeteorologicalData

Table6A1stQuarterJFDGroundLevelReleases JointFrequencyDistributionInPercent

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JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS A (DELTA T<=-1.9 C/100 M)

BROWNS FERRY NUCLEAR PLANT JAN 1, 2020 - MAR 31, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.046 0.046 0.000 0.000 0.000 0.092 NNE 0.000 0.000 0.000 0.000 0.000 0.322 0.000 0.000 0.000 0.322 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.000 0.092 0.644 0.092 0.000 0.000 0.000 0.000 0.828 SSE 0.000 0.000 0.276 0.414 0.046 0.000 0.000 0.000 0.000 0.736 S 0.000 0.000 0.322 0.138 0.000 0.000 0.000 0.000 0.000 0.460 SSW 0.000 0.000 0.046 0.046 0.000 0.000 0.000 0.000 0.000 0.092 SW 0.000 0.000 0.000 0.092 0.000 0.000 0.000 0.000 0.000 0.092 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.046 WNW 0.000 0.000 0.000 0.000 0.000 0.092 0.046 0.000 0.000 0.138 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.322 0.000 0.000 0.322 NNW 0.000 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.046 SUBTOTAL 0.000 0.000 0.736 1.334 0.230 0.506 0.368 0.000 0.000 3.174 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2174 TOTAL HOURS OF STABILITY CLASS A 69 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS A 69 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2174 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT 10.50 METER LEVEL DATE PRINTED: 2020/05/05 MEAN WIND SPEED = 6.16 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS B (-1.9< DELTA T<=-1.7 C/100 M)

BROWNS FERRY NUCLEAR PLANT JAN 1, 2020 - MAR 31, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.184 0.092 0.000 0.000 0.000 0.276 NNE 0.000 0.000 0.000 0.000 0.230 0.184 0.000 0.000 0.000 0.414 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.046 ESE 0.000 0.000 0.000 0.092 0.000 0.000 0.000 0.000 0.000 0.092 SE 0.000 0.000 0.046 0.184 0.000 0.000 0.000 0.000 0.000 0.230 SSE 0.000 0.000 0.460 0.092 0.000 0.000 0.000 0.000 0.000 0.552 S 0.000 0.000 0.184 0.046 0.000 0.000 0.000 0.000 0.000 0.230 SSW 0.000 0.000 0.046 0.046 0.000 0.000 0.000 0.000 0.000 0.092 SW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WSW 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.046 W 0.000 0.000 0.000 0.046 0.000 0.138 0.000 0.000 0.000 0.184 WNW 0.000 0.000 0.000 0.000 0.000 0.276 0.138 0.000 0.000 0.414 NW 0.000 0.000 0.000 0.000 0.000 0.092 0.230 0.000 0.000 0.322 NNW 0.000 0.000 0.000 0.000 0.046 0.138 0.000 0.000 0.000 0.184 SUBTOTAL 0.000 0.000 0.782 0.506 0.506 0.920 0.368 0.000 0.000 3.082 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2174 TOTAL HOURS OF STABILITY CLASS B 67 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS B 67 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2174 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT 10.50 METER LEVEL DATE PRINTED: 2020/05/05 MEAN WIND SPEED = 6.89 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS C (-1.7< DELTA T<=-1.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT JAN 1, 2020 - MAR 31, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.046 0.276 0.046 0.000 0.000 0.000 0.368 NNE 0.000 0.000 0.000 0.000 0.046 0.046 0.000 0.000 0.000 0.092 NE 0.000 0.000 0.000 0.000 0.092 0.046 0.000 0.000 0.000 0.138 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.046 SE 0.000 0.000 0.138 0.230 0.000 0.000 0.000 0.000 0.000 0.368 SSE 0.000 0.000 0.092 0.000 0.000 0.000 0.000 0.000 0.000 0.092 S 0.000 0.000 0.092 0.000 0.000 0.000 0.000 0.000 0.000 0.092 SSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SW 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.046 WSW 0.000 0.000 0.000 0.000 0.046 0.092 0.000 0.000 0.000 0.138 W 0.000 0.000 0.000 0.046 0.000 0.092 0.000 0.000 0.000 0.138 WNW 0.000 0.000 0.000 0.000 0.000 0.322 0.184 0.000 0.000 0.506 NW 0.000 0.000 0.000 0.000 0.000 0.276 0.184 0.000 0.000 0.460 NNW 0.000 0.000 0.000 0.000 0.092 0.000 0.092 0.000 0.000 0.184 SUBTOTAL 0.000 0.000 0.322 0.414 0.552 0.920 0.460 0.000 0.000 2.668 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2174 TOTAL HOURS OF STABILITY CLASS C 58 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS C 58 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2174 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT 10.50 METER LEVEL DATE PRINTED: 2020/05/05 MEAN WIND SPEED = 8.07 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS D (-1.5< DELTA T<=-0.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT JAN 1, 2020 - MAR 31, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.092 0.506 1.472 0.598 0.000 0.000 0.000 2.668 NNE 0.000 0.000 0.414 0.598 1.104 1.426 0.000 0.000 0.000 3.542 NE 0.000 0.000 0.414 0.920 0.736 0.828 0.000 0.000 0.000 2.898 ENE 0.000 0.046 0.368 0.230 0.046 0.000 0.000 0.000 0.000 0.690 E 0.000 0.000 0.276 0.138 0.046 0.000 0.000 0.000 0.000 0.460 ESE 0.000 0.000 0.598 0.506 0.000 0.000 0.000 0.000 0.000 1.104 SE 0.000 0.000 0.782 0.782 0.092 0.000 0.000 0.000 0.000 1.656 SSE 0.000 0.046 1.472 0.276 0.092 0.000 0.000 0.000 0.000 1.886 S 0.000 0.046 0.736 0.046 0.092 0.000 0.000 0.000 0.000 0.920 SSW 0.000 0.000 0.598 0.184 0.000 0.000 0.000 0.000 0.000 0.782 SW 0.000 0.092 0.368 0.046 0.000 0.000 0.000 0.000 0.000 0.506 WSW 0.000 0.000 0.552 0.460 0.414 0.046 0.000 0.000 0.000 1.472 W 0.000 0.000 0.368 0.598 1.104 0.552 0.000 0.000 0.000 2.622 WNW 0.000 0.000 0.138 0.184 0.414 1.288 0.644 0.092 0.000 2.760 NW 0.000 0.000 0.184 0.230 0.552 1.656 1.242 0.092 0.000 3.956 NNW 0.000 0.046 0.046 0.138 0.690 1.380 0.092 0.000 0.000 2.392 SUBTOTAL 0.000 0.276 7.406 5.842 6.854 7.774 1.978 0.184 0.000 30.313 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2174 TOTAL HOURS OF STABILITY CLASS D 659 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS D 659 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2174 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT 10.50 METER LEVEL DATE PRINTED: 2020/05/05 MEAN WIND SPEED = 6.41 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS E (-0.5< DELTA T<= 1.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT JAN 1, 2020 - MAR 31, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.046 0.552 0.414 0.690 0.138 0.000 0.000 0.000 1.840 NNE 0.000 0.000 0.828 0.644 0.552 0.276 0.000 0.000 0.000 2.300 NE 0.000 0.092 0.506 0.644 0.276 0.230 0.092 0.000 0.000 1.840 ENE 0.000 0.092 0.368 0.184 0.184 0.046 0.000 0.000 0.000 0.874 E 0.000 0.000 0.644 0.276 0.046 0.000 0.000 0.000 0.000 0.966 ESE 0.000 0.322 1.840 0.460 0.230 0.000 0.000 0.000 0.000 2.852 SE 0.000 0.460 2.162 0.460 0.046 0.000 0.000 0.000 0.000 3.128 SSE 0.000 0.460 2.760 0.920 0.276 0.000 0.000 0.000 0.000 4.416 S 0.000 0.230 1.840 1.334 0.736 0.046 0.000 0.000 0.000 4.186 SSW 0.000 0.138 0.552 0.414 0.092 0.000 0.000 0.000 0.000 1.196 SW 0.000 0.184 0.782 0.046 0.000 0.000 0.000 0.000 0.000 1.012 WSW 0.000 0.092 1.058 0.460 0.046 0.000 0.000 0.000 0.000 1.656 W 0.000 0.092 0.828 0.782 0.368 0.092 0.046 0.000 0.000 2.208 WNW 0.000 0.046 0.414 0.460 0.322 0.414 0.322 0.000 0.000 1.978 NW 0.000 0.092 0.368 0.230 0.184 0.690 0.322 0.000 0.000 1.886 NNW 0.000 0.046 0.552 0.506 0.138 0.276 0.000 0.000 0.000 1.518 SUBTOTAL 0.000 2.392 16.053 8.234 4.186 2.208 0.782 0.000 0.000 33.855 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2174 TOTAL HOURS OF STABILITY CLASS E 736 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS E 736 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2174 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT 10.50 METER LEVEL DATE PRINTED: 2020/05/05 MEAN WIND SPEED = 4.01 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS F ( 1.5< DELTA T<= 4.0 C/100 M)

BROWNS FERRY NUCLEAR PLANT JAN 1, 2020 - MAR 31, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.002 0.046 0.552 0.230 0.046 0.000 0.000 0.000 0.000 0.876 NNE 0.002 0.046 0.506 0.092 0.092 0.046 0.000 0.000 0.000 0.784 NE 0.001 0.000 0.184 0.000 0.000 0.000 0.000 0.000 0.000 0.185 ENE 0.003 0.276 0.506 0.046 0.000 0.000 0.000 0.000 0.000 0.831 E 0.003 0.046 0.690 0.138 0.000 0.000 0.000 0.000 0.000 0.877 ESE 0.006 0.414 1.288 0.184 0.000 0.000 0.000 0.000 0.000 1.892 SE 0.005 0.644 0.828 0.276 0.000 0.000 0.000 0.000 0.000 1.753 SSE 0.012 0.322 3.220 1.012 0.138 0.138 0.000 0.000 0.000 4.842 S 0.007 0.230 1.840 2.300 0.736 0.092 0.000 0.000 0.000 5.205 SSW 0.001 0.092 0.092 0.230 0.092 0.092 0.000 0.000 0.000 0.599 SW 0.001 0.092 0.184 0.000 0.000 0.000 0.000 0.000 0.000 0.277 WSW 0.001 0.092 0.092 0.000 0.000 0.000 0.000 0.000 0.000 0.185 W 0.000 0.000 0.092 0.000 0.046 0.046 0.000 0.000 0.000 0.184 WNW 0.001 0.000 0.184 0.046 0.092 0.000 0.000 0.000 0.000 0.323 NW 0.002 0.184 0.276 0.092 0.000 0.000 0.046 0.000 0.000 0.600 NNW 0.001 0.046 0.276 0.184 0.000 0.000 0.000 0.000 0.000 0.507 SUBTOTAL 0.046 2.530 10.810 4.830 1.242 0.414 0.046 0.000 0.000 19.917 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2174 TOTAL HOURS OF STABILITY CLASS F 433 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS F 433 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2174 TOTAL HOURS CALM 1 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT 10.50 METER LEVEL DATE PRINTED: 2020/05/05 MEAN WIND SPEED = 3.16 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS G (DELTA T > 4.0 C/100 M)

BROWNS FERRY NUCLEAR PLANT JAN 1, 2020 - MAR 31, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.046 0.276 0.000 0.000 0.000 0.000 0.000 0.000 0.322 NNE 0.000 0.092 0.138 0.000 0.000 0.000 0.000 0.000 0.000 0.230 NE 0.000 0.230 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.276 ENE 0.000 0.138 0.138 0.046 0.000 0.000 0.000 0.000 0.000 0.322 E 0.000 0.046 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.092 ESE 0.000 0.138 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.138 SE 0.000 0.414 0.414 0.000 0.000 0.000 0.000 0.000 0.000 0.828 SSE 0.000 0.276 2.438 0.598 0.092 0.000 0.000 0.000 0.000 3.404 S 0.000 0.000 0.598 0.138 0.046 0.000 0.000 0.000 0.000 0.782 SSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SW 0.000 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.046 WSW 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.046 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.046 NW 0.000 0.138 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.184 NNW 0.000 0.184 0.092 0.000 0.000 0.000 0.000 0.000 0.000 0.276 SUBTOTAL 0.000 1.748 4.278 0.782 0.184 0.000 0.000 0.000 0.000 6.992 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2174 TOTAL HOURS OF STABILITY CLASS G 152 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS G 152 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2174 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT 10.50 METER LEVEL DATE PRINTED: 2020/05/05 MEAN WIND SPEED = 2.32 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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Table6B2ndQuarterJFDGroundLevelReleases JointFrequencyDistributionInPercent

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS A (DELTA T<=-1.9 C/100 M)

BROWNS FERRY NUCLEAR PLANT APR 1, 2020 - JUN 30, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.458 0.000 0.000 0.000 0.458 NNE 0.000 0.000 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.046 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.046 ESE 0.000 0.000 0.183 0.229 0.000 0.000 0.000 0.000 0.000 0.412 SE 0.000 0.000 0.412 0.366 0.000 0.000 0.000 0.000 0.000 0.779 SSE 0.000 0.000 0.733 0.046 0.000 0.000 0.000 0.000 0.000 0.779 S 0.000 0.000 0.779 0.137 0.000 0.000 0.000 0.000 0.000 0.916 SSW 0.000 0.000 0.412 0.183 0.000 0.000 0.000 0.000 0.000 0.596 SW 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.046 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.046 0.000 0.000 0.183 0.092 0.000 0.321 NNW 0.000 0.000 0.000 0.000 0.000 0.229 0.046 0.000 0.000 0.275 SUBTOTAL 0.000 0.000 2.565 1.054 0.000 0.733 0.229 0.092 0.000 4.672 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2183 TOTAL HOURS OF STABILITY CLASS A 102 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS A 102 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2183 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT 10.50 METER LEVEL DATE PRINTED: 2020/08/10 MEAN WIND SPEED = 4.90 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS B (-1.9< DELTA T<=-1.7 C/100 M)

BROWNS FERRY NUCLEAR PLANT APR 1, 2020 - JUN 30, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.321 0.000 0.000 0.000 0.321 NNE 0.000 0.000 0.000 0.000 0.092 0.412 0.000 0.000 0.000 0.504 NE 0.000 0.000 0.000 0.000 0.000 0.137 0.000 0.000 0.000 0.137 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.046 0.366 0.000 0.000 0.000 0.000 0.000 0.412 SE 0.000 0.000 0.458 0.183 0.000 0.000 0.000 0.000 0.000 0.641 SSE 0.000 0.000 0.275 0.046 0.000 0.000 0.000 0.000 0.000 0.321 S 0.000 0.000 0.504 0.137 0.000 0.000 0.000 0.000 0.000 0.641 SSW 0.000 0.000 0.183 0.137 0.000 0.000 0.000 0.000 0.000 0.321 SW 0.000 0.000 0.183 0.137 0.000 0.000 0.000 0.000 0.000 0.321 WSW 0.000 0.000 0.092 0.183 0.000 0.000 0.000 0.000 0.000 0.275 W 0.000 0.000 0.000 0.092 0.046 0.000 0.000 0.000 0.000 0.137 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.137 0.000 0.000 0.137 NW 0.000 0.000 0.000 0.000 0.046 0.229 0.183 0.046 0.000 0.504 NNW 0.000 0.000 0.000 0.000 0.046 0.366 0.046 0.000 0.000 0.458 SUBTOTAL 0.000 0.000 1.741 1.283 0.229 1.466 0.366 0.046 0.000 5.131 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2183 TOTAL HOURS OF STABILITY CLASS B 112 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS B 112 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2183 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT 10.50 METER LEVEL DATE PRINTED: 2020/08/10 MEAN WIND SPEED = 6.17 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS C (-1.7< DELTA T<=-1.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT APR 1, 2020 - JUN 30, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.046 0.092 0.229 0.000 0.000 0.000 0.366 NNE 0.000 0.000 0.000 0.000 0.275 0.275 0.000 0.000 0.000 0.550 NE 0.000 0.000 0.000 0.046 0.000 0.183 0.092 0.000 0.000 0.321 ENE 0.000 0.000 0.046 0.000 0.046 0.000 0.000 0.000 0.000 0.092 E 0.000 0.000 0.046 0.046 0.000 0.000 0.000 0.000 0.000 0.092 ESE 0.000 0.000 0.046 0.183 0.092 0.000 0.000 0.000 0.000 0.321 SE 0.000 0.000 0.596 0.000 0.000 0.000 0.000 0.000 0.000 0.596 SSE 0.000 0.000 0.321 0.046 0.000 0.000 0.000 0.000 0.000 0.366 S 0.000 0.000 0.504 0.046 0.000 0.000 0.000 0.000 0.000 0.550 SSW 0.000 0.000 0.321 0.183 0.000 0.000 0.000 0.000 0.000 0.504 SW 0.000 0.000 0.275 0.046 0.000 0.000 0.000 0.000 0.000 0.321 WSW 0.000 0.000 0.000 0.412 0.046 0.000 0.000 0.000 0.000 0.458 W 0.000 0.000 0.000 0.504 0.275 0.046 0.000 0.000 0.000 0.825 WNW 0.000 0.000 0.046 0.000 0.092 0.183 0.137 0.000 0.000 0.458 NW 0.000 0.000 0.046 0.000 0.046 0.321 0.366 0.000 0.000 0.779 NNW 0.000 0.000 0.046 0.000 0.183 0.137 0.000 0.000 0.000 0.366 SUBTOTAL 0.000 0.000 2.290 1.557 1.145 1.374 0.596 0.000 0.000 6.963 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2183 TOTAL HOURS OF STABILITY CLASS C 152 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS C 152 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2183 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT 10.50 METER LEVEL DATE PRINTED: 2020/08/10 MEAN WIND SPEED = 6.00 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS D (-1.5< DELTA T<=-0.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT APR 1, 2020 - JUN 30, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.229 0.321 0.687 0.229 0.046 0.000 0.000 1.512 NNE 0.000 0.000 0.137 0.550 0.596 0.321 0.000 0.000 0.000 1.603 NE 0.000 0.000 0.183 0.229 0.412 0.412 0.000 0.000 0.000 1.237 ENE 0.000 0.000 0.366 0.229 0.092 0.046 0.000 0.000 0.000 0.733 E 0.000 0.000 0.596 0.641 0.229 0.046 0.000 0.000 0.000 1.512 ESE 0.000 0.046 1.557 1.008 0.229 0.092 0.000 0.000 0.000 2.932 SE 0.000 0.000 1.420 0.046 0.000 0.000 0.000 0.000 0.000 1.466 SSE 0.000 0.229 1.741 0.092 0.000 0.000 0.000 0.000 0.000 2.061 S 0.000 0.275 0.962 0.229 0.000 0.000 0.000 0.000 0.000 1.466 SSW 0.000 0.137 1.374 0.275 0.000 0.000 0.000 0.000 0.000 1.787 SW 0.000 0.137 0.733 0.137 0.000 0.000 0.000 0.000 0.000 1.008 WSW 0.000 0.000 0.825 0.733 0.137 0.092 0.000 0.000 0.000 1.787 W 0.000 0.000 1.099 1.970 0.962 0.870 0.046 0.000 0.000 4.947 WNW 0.000 0.000 0.092 0.641 0.687 1.328 0.916 0.000 0.000 3.665 NW 0.000 0.000 0.229 0.596 0.733 1.741 0.504 0.000 0.000 3.802 NNW 0.000 0.000 0.046 0.504 0.504 0.412 0.137 0.000 0.000 1.603 SUBTOTAL 0.000 0.825 11.590 8.200 5.268 5.589 1.649 0.000 0.000 33.120 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2183 TOTAL HOURS OF STABILITY CLASS D 723 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS D 723 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2183 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT 10.50 METER LEVEL DATE PRINTED: 2020/08/10 MEAN WIND SPEED = 5.34 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS E (-0.5< DELTA T<= 1.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT APR 1, 2020 - JUN 30, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.046 0.916 0.550 0.137 0.046 0.000 0.000 0.000 1.695 NNE 0.000 0.000 0.412 0.550 0.092 0.046 0.000 0.000 0.000 1.099 NE 0.000 0.229 0.458 0.275 0.046 0.046 0.000 0.000 0.000 1.054 ENE 0.000 0.229 1.283 0.504 0.046 0.000 0.000 0.000 0.000 2.061 E 0.000 0.275 3.069 1.832 0.550 0.092 0.000 0.000 0.000 5.818 ESE 0.000 0.596 2.703 0.687 0.412 0.046 0.000 0.000 0.000 4.443 SE 0.000 0.366 1.099 0.092 0.000 0.000 0.000 0.000 0.000 1.557 SSE 0.000 0.458 1.328 0.046 0.000 0.000 0.000 0.000 0.000 1.832 S 0.000 0.321 1.008 0.137 0.000 0.000 0.000 0.000 0.000 1.466 SSW 0.000 0.275 0.596 0.092 0.000 0.000 0.000 0.000 0.000 0.962 SW 0.000 0.092 0.504 0.000 0.000 0.000 0.000 0.000 0.000 0.596 WSW 0.000 0.137 0.596 0.183 0.000 0.046 0.000 0.000 0.000 0.962 W 0.000 0.092 0.687 0.733 0.229 0.046 0.000 0.000 0.000 1.787 WNW 0.000 0.000 0.137 0.092 0.092 0.046 0.000 0.000 0.000 0.366 NW 0.000 0.137 0.458 0.229 0.275 0.183 0.000 0.000 0.000 1.283 NNW 0.000 0.000 0.779 0.458 0.458 0.504 0.046 0.000 0.000 2.245 SUBTOTAL 0.000 3.252 16.033 6.459 2.336 1.099 0.046 0.000 0.000 29.226 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2183 TOTAL HOURS OF STABILITY CLASS E 638 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS E 638 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2183 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT 10.50 METER LEVEL DATE PRINTED: 2020/08/10 MEAN WIND SPEED = 3.24 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS F ( 1.5< DELTA T<= 4.0 C/100 M)

BROWNS FERRY NUCLEAR PLANT APR 1, 2020 - JUN 30, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.046 1.283 0.275 0.000 0.000 0.000 0.000 0.000 1.603 NNE 0.000 0.092 0.641 0.641 0.046 0.000 0.000 0.000 0.000 1.420 NE 0.000 0.229 0.641 0.046 0.000 0.000 0.000 0.000 0.000 0.916 ENE 0.000 0.183 0.733 0.183 0.000 0.000 0.000 0.000 0.000 1.099 E 0.000 0.412 1.466 0.183 0.046 0.000 0.000 0.000 0.000 2.107 ESE 0.000 0.321 0.779 0.137 0.046 0.000 0.000 0.000 0.000 1.283 SE 0.000 0.412 0.321 0.046 0.000 0.000 0.000 0.000 0.000 0.779 SSE 0.000 0.229 0.275 0.000 0.000 0.000 0.000 0.000 0.000 0.504 S 0.000 0.137 0.183 0.000 0.000 0.000 0.000 0.000 0.000 0.321 SSW 0.000 0.092 0.183 0.000 0.000 0.000 0.000 0.000 0.000 0.275 SW 0.000 0.046 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.092 WSW 0.000 0.000 0.046 0.046 0.000 0.000 0.000 0.000 0.000 0.092 W 0.000 0.092 0.092 0.000 0.000 0.000 0.000 0.000 0.000 0.183 WNW 0.000 0.046 0.092 0.046 0.000 0.046 0.000 0.000 0.000 0.229 NW 0.000 0.000 0.229 0.000 0.000 0.000 0.000 0.000 0.000 0.229 NNW 0.000 0.046 0.550 0.366 0.000 0.000 0.000 0.000 0.000 0.962 SUBTOTAL 0.000 2.382 7.558 1.970 0.137 0.046 0.000 0.000 0.000 12.093 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2183 TOTAL HOURS OF STABILITY CLASS F 264 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS F 264 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2183 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT 10.50 METER LEVEL DATE PRINTED: 2020/08/10 MEAN WIND SPEED = 2.50 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS G (DELTA T > 4.0 C/100 M)

BROWNS FERRY NUCLEAR PLANT APR 1, 2020 - JUN 30, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.026 1.328 1.008 0.183 0.000 0.000 0.000 0.000 0.000 2.545 NNE 0.012 0.596 0.458 0.046 0.000 0.000 0.000 0.000 0.000 1.111 NE 0.009 0.229 0.596 0.000 0.000 0.000 0.000 0.000 0.000 0.834 ENE 0.009 0.412 0.366 0.046 0.000 0.000 0.000 0.000 0.000 0.833 E 0.006 0.321 0.229 0.000 0.000 0.000 0.000 0.000 0.000 0.556 ESE 0.004 0.137 0.229 0.000 0.000 0.000 0.000 0.000 0.000 0.371 SE 0.005 0.275 0.183 0.000 0.000 0.000 0.000 0.000 0.000 0.463 SSE 0.002 0.046 0.092 0.000 0.000 0.000 0.000 0.000 0.000 0.139 S 0.001 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.046 SSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SW 0.001 0.092 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.138 WSW 0.001 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.046 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.002 0.137 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.185 NW 0.004 0.275 0.092 0.000 0.000 0.000 0.000 0.000 0.000 0.371 NNW 0.012 0.870 0.183 0.092 0.000 0.000 0.000 0.000 0.000 1.157 SUBTOTAL 0.092 4.810 3.436 0.412 0.046 0.000 0.000 0.000 0.000 8.795 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2183 TOTAL HOURS OF STABILITY CLASS G 192 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS G 192 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2183 TOTAL HOURS CALM 2 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT 10.50 METER LEVEL DATE PRINTED: 2020/08/10 MEAN WIND SPEED = 1.64 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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Table6C3rdQuarterJFDGroundLevelReleases JointFrequencyDistributionInPercent

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS A (DELTA T<=-1.9 C/100 M)

BROWNS FERRY NUCLEAR PLANT JUL 1, 2020 - SEP 30, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.046 0.137 0.000 0.000 0.000 0.183 NNE 0.000 0.000 0.000 0.000 0.046 0.137 0.000 0.000 0.000 0.183 NE 0.000 0.000 0.000 0.000 0.000 0.091 0.000 0.000 0.000 0.091 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.046 0.046 0.000 0.000 0.000 0.000 0.000 0.091 ESE 0.000 0.000 0.365 0.457 0.046 0.000 0.000 0.000 0.000 0.868 SE 0.000 0.000 1.142 1.142 0.000 0.000 0.000 0.000 0.000 2.283 SSE 0.000 0.000 1.826 0.822 0.000 0.000 0.000 0.000 0.000 2.648 S 0.000 0.000 0.639 0.320 0.000 0.000 0.000 0.000 0.000 0.959 SSW 0.000 0.000 0.320 0.183 0.000 0.000 0.000 0.000 0.000 0.502 SW 0.000 0.000 0.274 0.091 0.000 0.000 0.000 0.000 0.000 0.365 WSW 0.000 0.000 0.091 0.274 0.137 0.000 0.000 0.000 0.000 0.502 W 0.000 0.000 0.000 0.183 0.548 0.411 0.000 0.000 0.000 1.142 WNW 0.000 0.000 0.000 0.000 0.183 0.548 0.000 0.000 0.000 0.731 NW 0.000 0.000 0.000 0.000 0.046 0.137 0.046 0.000 0.000 0.228 NNW 0.000 0.000 0.000 0.000 0.046 0.502 0.000 0.000 0.000 0.548 SUBTOTAL 0.000 0.000 4.703 3.516 1.096 1.963 0.046 0.000 0.000 11.324 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2190 TOTAL HOURS OF STABILITY CLASS A 248 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS A 248 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2190 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT 10.50 METER LEVEL DATE PRINTED: 2020/10/13 MEAN WIND SPEED = 4.78 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS B (-1.9< DELTA T<=-1.7 C/100 M)

BROWNS FERRY NUCLEAR PLANT JUL 1, 2020 - SEP 30, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.046 NNE 0.000 0.000 0.000 0.000 0.046 0.091 0.000 0.000 0.000 0.137 NE 0.000 0.000 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.046 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.046 0.091 0.000 0.000 0.000 0.000 0.000 0.137 ESE 0.000 0.000 0.091 0.183 0.000 0.000 0.000 0.000 0.000 0.274 SE 0.000 0.000 0.639 0.046 0.000 0.000 0.000 0.000 0.000 0.685 SSE 0.000 0.000 0.639 0.046 0.000 0.000 0.000 0.000 0.000 0.685 S 0.000 0.000 0.548 0.183 0.000 0.000 0.000 0.000 0.000 0.731 SSW 0.000 0.000 0.228 0.228 0.000 0.000 0.000 0.000 0.000 0.457 SW 0.000 0.000 0.274 0.091 0.000 0.000 0.000 0.000 0.000 0.365 WSW 0.000 0.000 0.046 0.274 0.091 0.000 0.000 0.000 0.000 0.411 W 0.000 0.000 0.091 0.274 0.457 0.091 0.000 0.000 0.000 0.913 WNW 0.000 0.000 0.000 0.046 0.274 0.046 0.000 0.000 0.000 0.365 NW 0.000 0.000 0.000 0.046 0.046 0.091 0.000 0.000 0.000 0.183 NNW 0.000 0.000 0.000 0.000 0.091 0.320 0.000 0.000 0.000 0.411 SUBTOTAL 0.000 0.000 2.603 1.507 1.050 0.685 0.000 0.000 0.000 5.845 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2190 TOTAL HOURS OF STABILITY CLASS B 128 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS B 128 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2190 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT 10.50 METER LEVEL DATE PRINTED: 2020/10/13 MEAN WIND SPEED = 4.51 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS C (-1.7< DELTA T<=-1.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT JUL 1, 2020 - SEP 30, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.046 0.000 0.046 0.000 0.000 0.000 0.091 NNE 0.000 0.000 0.000 0.091 0.183 0.365 0.000 0.000 0.000 0.639 NE 0.000 0.000 0.000 0.046 0.091 0.000 0.000 0.000 0.000 0.137 ENE 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.046 E 0.000 0.000 0.091 0.000 0.046 0.000 0.000 0.000 0.000 0.137 ESE 0.000 0.000 0.228 0.137 0.046 0.000 0.000 0.000 0.000 0.411 SE 0.000 0.000 0.594 0.046 0.000 0.000 0.000 0.000 0.000 0.639 SSE 0.000 0.000 0.731 0.000 0.000 0.000 0.000 0.000 0.000 0.731 S 0.000 0.000 0.594 0.046 0.000 0.000 0.000 0.000 0.000 0.639 SSW 0.000 0.000 0.502 0.000 0.000 0.000 0.000 0.000 0.000 0.502 SW 0.000 0.000 0.137 0.183 0.000 0.000 0.000 0.000 0.000 0.320 WSW 0.000 0.000 0.365 0.137 0.046 0.000 0.000 0.000 0.000 0.548 W 0.000 0.000 0.091 0.457 0.320 0.137 0.000 0.000 0.000 1.005 WNW 0.000 0.000 0.000 0.137 0.046 0.183 0.046 0.000 0.000 0.411 NW 0.000 0.000 0.000 0.000 0.046 0.137 0.046 0.000 0.000 0.228 NNW 0.000 0.000 0.000 0.000 0.091 0.091 0.000 0.000 0.000 0.183 SUBTOTAL 0.000 0.000 3.379 1.324 0.913 0.959 0.091 0.000 0.000 6.667 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2190 TOTAL HOURS OF STABILITY CLASS C 146 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS C 146 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2190 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT 10.50 METER LEVEL DATE PRINTED: 2020/10/13 MEAN WIND SPEED = 4.61 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS D (-1.5< DELTA T<=-0.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT JUL 1, 2020 - SEP 30, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.274 0.320 0.274 0.091 0.000 0.000 0.000 0.959 NNE 0.000 0.000 0.411 0.411 0.274 0.274 0.000 0.000 0.000 1.370 NE 0.000 0.000 0.320 0.411 0.685 0.183 0.046 0.000 0.000 1.644 ENE 0.000 0.000 0.639 0.046 0.320 0.046 0.000 0.000 0.000 1.050 E 0.000 0.091 0.639 1.005 0.502 0.091 0.000 0.000 0.000 2.329 ESE 0.000 0.046 0.731 0.685 0.000 0.046 0.000 0.000 0.000 1.507 SE 0.000 0.000 0.685 0.091 0.000 0.000 0.000 0.000 0.000 0.776 SSE 0.000 0.091 1.416 0.183 0.000 0.000 0.000 0.000 0.000 1.689 S 0.000 0.000 2.100 0.365 0.000 0.000 0.000 0.000 0.000 2.466 SSW 0.000 0.091 2.055 0.320 0.000 0.000 0.000 0.000 0.000 2.466 SW 0.000 0.046 0.868 0.046 0.000 0.000 0.000 0.000 0.000 0.959 WSW 0.000 0.091 1.963 0.639 0.000 0.046 0.000 0.000 0.000 2.740 W 0.000 0.000 1.735 1.187 0.411 0.046 0.000 0.000 0.000 3.379 WNW 0.000 0.000 0.091 0.411 0.091 0.411 0.000 0.000 0.000 1.005 NW 0.000 0.000 0.274 0.365 0.228 0.228 0.137 0.000 0.000 1.233 NNW 0.000 0.000 0.365 0.594 0.411 0.320 0.000 0.000 0.000 1.689 SUBTOTAL 0.000 0.457 14.566 7.078 3.196 1.781 0.183 0.000 0.000 27.260 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2190 TOTAL HOURS OF STABILITY CLASS D 597 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS D 597 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2190 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT 10.50 METER LEVEL DATE PRINTED: 2020/10/13 MEAN WIND SPEED = 3.87 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS E (-0.5< DELTA T<= 1.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT JUL 1, 2020 - SEP 30, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.137 1.781 1.142 0.137 0.046 0.000 0.000 0.000 3.242 NNE 0.000 0.183 1.324 1.370 0.776 0.457 0.000 0.000 0.000 4.110 NE 0.000 0.091 0.868 0.594 0.639 0.274 0.000 0.000 0.000 2.466 ENE 0.000 0.183 2.192 0.822 0.091 0.000 0.000 0.000 0.000 3.288 E 0.000 0.274 2.831 3.196 0.548 0.000 0.000 0.000 0.000 6.849 ESE 0.000 0.365 1.416 0.320 0.000 0.000 0.000 0.000 0.000 2.100 SE 0.000 0.228 0.959 0.000 0.000 0.000 0.000 0.000 0.000 1.187 SSE 0.000 0.411 0.685 0.000 0.000 0.000 0.000 0.000 0.000 1.096 S 0.000 0.274 0.822 0.228 0.000 0.000 0.000 0.000 0.000 1.324 SSW 0.000 0.137 0.548 0.000 0.000 0.000 0.000 0.000 0.000 0.685 SW 0.000 0.228 0.228 0.000 0.000 0.000 0.000 0.000 0.000 0.457 WSW 0.000 0.091 0.731 0.274 0.000 0.000 0.000 0.000 0.000 1.096 W 0.000 0.046 1.005 0.411 0.000 0.046 0.000 0.000 0.000 1.507 WNW 0.000 0.091 0.183 0.091 0.137 0.000 0.000 0.000 0.000 0.502 NW 0.000 0.000 0.320 0.091 0.091 0.000 0.000 0.000 0.000 0.502 NNW 0.000 0.091 0.822 0.411 0.137 0.091 0.000 0.000 0.000 1.553 SUBTOTAL 0.000 2.831 16.712 8.950 2.557 0.913 0.000 0.000 0.000 31.963 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2190 TOTAL HOURS OF STABILITY CLASS E 700 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS E 700 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2190 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT 10.50 METER LEVEL DATE PRINTED: 2020/10/13 MEAN WIND SPEED = 3.33 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS F ( 1.5< DELTA T<= 4.0 C/100 M)

BROWNS FERRY NUCLEAR PLANT JUL 1, 2020 - SEP 30, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.274 1.553 0.228 0.000 0.000 0.000 0.000 0.000 2.055 NNE 0.000 0.228 1.142 0.137 0.046 0.000 0.000 0.000 0.000 1.553 NE 0.000 0.183 0.639 0.091 0.091 0.000 0.000 0.000 0.000 1.005 ENE 0.000 0.183 1.050 0.502 0.000 0.000 0.000 0.000 0.000 1.735 E 0.000 0.274 1.187 0.776 0.000 0.000 0.000 0.000 0.000 2.237 ESE 0.000 0.274 0.365 0.046 0.000 0.000 0.000 0.000 0.000 0.685 SE 0.000 0.046 0.091 0.000 0.000 0.000 0.000 0.000 0.000 0.137 SSE 0.000 0.046 0.228 0.000 0.000 0.000 0.000 0.000 0.000 0.274 S 0.000 0.091 0.137 0.000 0.000 0.000 0.000 0.000 0.000 0.228 SSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SW 0.000 0.046 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.091 WSW 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.046 W 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.046 WNW 0.000 0.000 0.046 0.000 0.046 0.000 0.000 0.000 0.000 0.091 NW 0.000 0.091 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.137 NNW 0.000 0.320 0.685 0.000 0.046 0.000 0.000 0.000 0.000 1.050 SUBTOTAL 0.000 2.100 7.215 1.826 0.228 0.000 0.000 0.000 0.000 11.370 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2190 TOTAL HOURS OF STABILITY CLASS F 249 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS F 249 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2190 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT 10.50 METER LEVEL DATE PRINTED: 2020/10/13 MEAN WIND SPEED = 2.50 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS G (DELTA T > 4.0 C/100 M)

BROWNS FERRY NUCLEAR PLANT JUL 1, 2020 - SEP 30, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.014 0.365 1.187 0.183 0.000 0.000 0.000 0.000 0.000 1.749 NNE 0.010 0.411 0.731 0.137 0.000 0.000 0.000 0.000 0.000 1.289 NE 0.007 0.320 0.411 0.000 0.000 0.000 0.000 0.000 0.000 0.737 ENE 0.004 0.183 0.228 0.091 0.046 0.000 0.000 0.000 0.000 0.552 E 0.002 0.000 0.228 0.000 0.000 0.000 0.000 0.000 0.000 0.230 ESE 0.002 0.091 0.091 0.000 0.000 0.000 0.000 0.000 0.000 0.184 SE 0.002 0.137 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.184 SSE 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.046 S 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSW 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.046 SW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.046 NNW 0.005 0.320 0.183 0.000 0.000 0.000 0.000 0.000 0.000 0.507 SUBTOTAL 0.046 1.918 3.151 0.411 0.046 0.000 0.000 0.000 0.000 5.571 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2190 TOTAL HOURS OF STABILITY CLASS G 122 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS G 122 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2190 TOTAL HOURS CALM 1 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT 10.50 METER LEVEL DATE PRINTED: 2020/10/13 MEAN WIND SPEED = 2.08 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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Table6D4thQuarterJFDGroundLevelReleases JointFrequencyDistributionInPercent

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS A (DELTA T<=-1.9 C/100 M)

BROWNS FERRY NUCLEAR PLANT OCT 1, 2020 - DEC 31, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNE 0.000 0.000 0.000 0.000 0.045 0.045 0.000 0.000 0.000 0.091 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.091 0.000 0.000 0.000 0.000 0.000 0.091 SE 0.000 0.000 0.318 0.364 0.000 0.000 0.000 0.000 0.000 0.682 SSE 0.000 0.000 0.545 0.545 0.000 0.000 0.000 0.000 0.000 1.091 S 0.000 0.000 0.227 0.136 0.000 0.000 0.000 0.000 0.000 0.364 SSW 0.000 0.000 0.000 0.091 0.000 0.000 0.000 0.000 0.000 0.091 SW 0.000 0.000 0.000 0.045 0.000 0.000 0.000 0.000 0.000 0.045 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.000 0.000 0.045 0.000 0.000 0.000 0.045 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.091 0.000 0.000 0.091 NNW 0.000 0.000 0.000 0.000 0.000 0.091 0.045 0.000 0.000 0.136 SUBTOTAL 0.000 0.000 1.091 1.273 0.045 0.182 0.136 0.000 0.000 2.727 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2200 TOTAL HOURS OF STABILITY CLASS A 60 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS A 60 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2200 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT 10.50 METER LEVEL DATE PRINTED: 2021/01/04 MEAN WIND SPEED = 4.52 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS B (-1.9< DELTA T<=-1.7 C/100 M)

BROWNS FERRY NUCLEAR PLANT OCT 1, 2020 - DEC 31, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.182 0.182 0.000 0.000 0.000 0.364 NNE 0.000 0.000 0.000 0.000 0.000 0.136 0.000 0.000 0.000 0.136 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.318 0.045 0.000 0.000 0.000 0.000 0.364 SE 0.000 0.000 0.136 0.182 0.000 0.000 0.000 0.000 0.000 0.318 SSE 0.000 0.000 0.091 0.091 0.000 0.000 0.000 0.000 0.000 0.182 S 0.000 0.000 0.136 0.000 0.000 0.000 0.000 0.000 0.000 0.136 SSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SW 0.000 0.000 0.000 0.045 0.000 0.000 0.000 0.000 0.000 0.045 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.000 0.000 0.045 0.045 0.000 0.000 0.091 WNW 0.000 0.000 0.000 0.000 0.000 0.091 0.000 0.000 0.000 0.091 NW 0.000 0.000 0.000 0.000 0.000 0.045 0.000 0.000 0.000 0.045 NNW 0.000 0.000 0.000 0.000 0.182 0.273 0.318 0.000 0.000 0.773 SUBTOTAL 0.000 0.000 0.364 0.636 0.409 0.773 0.364 0.000 0.000 2.545 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2200 TOTAL HOURS OF STABILITY CLASS B 56 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS B 56 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2200 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT 10.50 METER LEVEL DATE PRINTED: 2021/01/04 MEAN WIND SPEED = 7.37 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS C (-1.7< DELTA T<=-1.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT OCT 1, 2020 - DEC 31, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.045 0.227 0.091 0.000 0.000 0.000 0.364 NNE 0.000 0.000 0.000 0.000 0.045 0.136 0.000 0.000 0.000 0.182 NE 0.000 0.000 0.000 0.000 0.045 0.000 0.000 0.000 0.000 0.045 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.227 0.045 0.000 0.000 0.000 0.000 0.273 SE 0.000 0.000 0.227 0.045 0.000 0.000 0.000 0.000 0.000 0.273 SSE 0.000 0.000 0.318 0.091 0.000 0.000 0.000 0.000 0.000 0.409 S 0.000 0.000 0.273 0.045 0.000 0.000 0.000 0.000 0.000 0.318 SSW 0.000 0.000 0.091 0.000 0.000 0.000 0.000 0.000 0.000 0.091 SW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WSW 0.000 0.000 0.000 0.227 0.045 0.000 0.000 0.000 0.000 0.273 W 0.000 0.000 0.000 0.045 0.000 0.045 0.045 0.000 0.000 0.136 WNW 0.000 0.000 0.000 0.000 0.045 0.273 0.045 0.000 0.000 0.364 NW 0.000 0.000 0.000 0.000 0.045 0.273 0.136 0.000 0.000 0.455 NNW 0.000 0.000 0.000 0.045 0.045 0.091 0.045 0.000 0.000 0.227 SUBTOTAL 0.000 0.000 0.909 0.773 0.545 0.909 0.273 0.000 0.000 3.409 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2200 TOTAL HOURS OF STABILITY CLASS C 75 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS C 75 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2200 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT 10.50 METER LEVEL DATE PRINTED: 2021/01/04 MEAN WIND SPEED = 6.38 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS D (-1.5< DELTA T<=-0.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT OCT 1, 2020 - DEC 31, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.273 0.909 1.000 0.455 0.000 0.000 0.000 2.636 NNE 0.000 0.000 0.227 1.000 1.000 0.182 0.136 0.000 0.000 2.545 NE 0.000 0.000 0.091 0.545 0.409 0.227 0.000 0.000 0.000 1.273 ENE 0.000 0.045 0.273 0.227 0.318 0.091 0.000 0.000 0.000 0.955 E 0.000 0.000 0.545 0.409 0.182 0.227 0.000 0.000 0.000 1.364 ESE 0.000 0.000 0.909 1.500 0.045 0.045 0.000 0.000 0.000 2.500 SE 0.000 0.045 1.773 0.455 0.000 0.000 0.000 0.000 0.000 2.273 SSE 0.000 0.000 1.909 0.318 0.000 0.000 0.000 0.000 0.000 2.227 S 0.000 0.045 0.818 0.000 0.000 0.000 0.000 0.000 0.000 0.864 SSW 0.000 0.000 0.591 0.045 0.000 0.000 0.000 0.000 0.000 0.636 SW 0.000 0.000 0.409 0.045 0.000 0.000 0.000 0.000 0.000 0.455 WSW 0.000 0.045 0.500 0.545 0.091 0.091 0.000 0.000 0.000 1.273 W 0.000 0.000 0.727 1.000 0.727 0.727 0.045 0.000 0.000 3.227 WNW 0.000 0.000 0.273 0.591 0.455 0.591 1.000 0.045 0.000 2.955 NW 0.000 0.000 0.227 0.909 0.455 1.273 1.500 0.000 0.000 4.364 NNW 0.000 0.000 0.273 0.591 0.364 1.455 0.136 0.000 0.000 2.818 SUBTOTAL 0.000 0.182 9.818 9.091 5.045 5.364 2.818 0.045 0.000 32.364 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2200 TOTAL HOURS OF STABILITY CLASS D 712 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS D 712 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2200 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT 10.50 METER LEVEL DATE PRINTED: 2021/01/04 MEAN WIND SPEED = 5.92 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS E (-0.5< DELTA T<= 1.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT OCT 1, 2020 - DEC 31, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.003 0.000 0.955 0.545 0.455 0.045 0.000 0.000 0.000 2.003 NNE 0.003 0.091 0.818 0.591 0.182 0.091 0.000 0.000 0.000 1.775 NE 0.001 0.136 0.182 0.636 0.227 0.091 0.000 0.000 0.000 1.274 ENE 0.003 0.091 0.955 0.364 0.227 0.182 0.000 0.000 0.000 1.821 E 0.007 0.000 2.227 1.455 0.227 0.091 0.000 0.000 0.000 4.007 ESE 0.008 0.318 2.455 2.409 0.227 0.000 0.000 0.000 0.000 5.417 SE 0.006 0.318 1.636 0.364 0.000 0.000 0.000 0.000 0.000 2.324 SSE 0.005 0.091 1.409 1.409 0.455 0.045 0.000 0.000 0.000 3.414 S 0.002 0.136 0.545 0.455 0.227 0.000 0.000 0.000 0.000 1.366 SSW 0.000 0.045 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.091 SW 0.001 0.136 0.273 0.091 0.000 0.000 0.000 0.000 0.000 0.501 WSW 0.002 0.182 0.455 0.045 0.000 0.045 0.000 0.000 0.000 0.729 W 0.002 0.045 0.591 0.818 0.227 0.091 0.000 0.000 0.000 1.775 WNW 0.001 0.045 0.318 0.182 0.227 0.136 0.045 0.000 0.000 0.956 NW 0.001 0.000 0.182 0.136 0.091 0.273 0.000 0.000 0.000 0.682 NNW 0.001 0.000 0.364 0.545 0.455 0.364 0.000 0.000 0.000 1.728 SUBTOTAL 0.045 1.636 13.409 10.045 3.227 1.455 0.045 0.000 0.000 29.864 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2200 TOTAL HOURS OF STABILITY CLASS E 657 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS E 657 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2200 TOTAL HOURS CALM 1 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT 10.50 METER LEVEL DATE PRINTED: 2021/01/04 MEAN WIND SPEED = 3.79 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS F ( 1.5< DELTA T<= 4.0 C/100 M)

BROWNS FERRY NUCLEAR PLANT OCT 1, 2020 - DEC 31, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.227 1.364 0.182 0.000 0.000 0.000 0.000 0.000 1.773 NNE 0.000 0.273 0.409 0.273 0.045 0.000 0.000 0.000 0.000 1.000 NE 0.000 0.091 0.136 0.045 0.000 0.000 0.000 0.000 0.000 0.273 ENE 0.000 0.182 0.818 0.182 0.045 0.000 0.000 0.000 0.000 1.227 E 0.000 0.091 2.136 0.545 0.000 0.000 0.000 0.000 0.000 2.773 ESE 0.000 0.273 1.318 0.318 0.000 0.000 0.000 0.000 0.000 1.909 SE 0.000 0.273 1.091 0.045 0.000 0.000 0.000 0.000 0.000 1.409 SSE 0.000 0.182 1.136 0.500 0.273 0.000 0.000 0.000 0.000 2.091 S 0.000 0.045 0.091 0.000 0.091 0.000 0.000 0.000 0.000 0.227 SSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SW 0.000 0.045 0.045 0.045 0.000 0.000 0.000 0.000 0.000 0.136 WSW 0.000 0.091 0.091 0.000 0.000 0.000 0.000 0.000 0.000 0.182 W 0.000 0.000 0.136 0.000 0.000 0.000 0.000 0.000 0.000 0.136 WNW 0.000 0.091 0.091 0.000 0.000 0.000 0.000 0.000 0.000 0.182 NW 0.000 0.136 0.091 0.000 0.045 0.000 0.000 0.000 0.000 0.273 NNW 0.000 0.091 0.636 0.136 0.045 0.000 0.000 0.000 0.000 0.909 SUBTOTAL 0.000 2.091 9.591 2.273 0.545 0.000 0.000 0.000 0.000 14.500 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2200 TOTAL HOURS OF STABILITY CLASS F 319 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS F 319 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2200 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT 10.50 METER LEVEL DATE PRINTED: 2021/01/04 MEAN WIND SPEED = 2.61 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS G (DELTA T > 4.0 C/100 M)

BROWNS FERRY NUCLEAR PLANT OCT 1, 2020 - DEC 31, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.019 1.227 1.500 0.455 0.000 0.000 0.000 0.000 0.000 3.201 NNE 0.017 1.545 0.864 0.318 0.000 0.000 0.000 0.000 0.000 2.744 NE 0.012 0.864 0.818 0.045 0.000 0.000 0.000 0.000 0.000 1.739 ENE 0.010 0.409 0.955 0.136 0.045 0.000 0.000 0.000 0.000 1.555 E 0.008 0.364 0.818 0.000 0.000 0.000 0.000 0.000 0.000 1.190 ESE 0.008 0.318 0.818 0.000 0.000 0.000 0.000 0.000 0.000 1.144 SE 0.005 0.227 0.500 0.000 0.000 0.000 0.000 0.000 0.000 0.732 SSE 0.005 0.136 0.636 0.409 0.000 0.000 0.000 0.000 0.000 1.187 S 0.001 0.136 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.137 SSW 0.001 0.136 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.183 SW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.001 0.045 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.092 WNW 0.000 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.046 NW 0.001 0.182 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.183 NNW 0.003 0.273 0.091 0.091 0.000 0.000 0.000 0.000 0.000 0.457 SUBTOTAL 0.091 5.909 7.091 1.455 0.045 0.000 0.000 0.000 0.000 14.591 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2200 TOTAL HOURS OF STABILITY CLASS G 321 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS G 321 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2200 TOTAL HOURS CALM 2 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT 10.50 METER LEVEL DATE PRINTED: 2021/01/04 MEAN WIND SPEED = 1.95 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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Table7A1stQuarterJFDSplitLevelReleases JointFrequencyDistributionInPercent (GroundLevelReleaseModeandElevatedReleaseMode)

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS A (DELTA T<=-1.9 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE JAN 1, 2020 - MAR 31, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.005 0.006 0.000 0.000 0.000 0.011 NNE 0.000 0.000 0.000 0.000 0.000 0.050 0.000 0.000 0.000 0.050 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.000 0.004 0.075 0.015 0.000 0.000 0.000 0.000 0.094 SSE 0.000 0.000 0.022 0.059 0.009 0.000 0.000 0.000 0.000 0.090 S 0.000 0.000 0.008 0.019 0.000 0.000 0.000 0.000 0.000 0.027 SSW 0.000 0.000 0.005 0.004 0.000 0.000 0.000 0.000 0.000 0.008 SW 0.000 0.000 0.000 0.006 0.000 0.000 0.000 0.000 0.000 0.006 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.000 0.000 0.009 0.000 0.000 0.000 0.009 WNW 0.000 0.000 0.000 0.000 0.000 0.016 0.016 0.000 0.000 0.032 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.076 0.000 0.000 0.076 NNW 0.000 0.000 0.000 0.000 0.005 0.000 0.000 0.000 0.000 0.005 SUBTOTAL 0.000 0.000 0.038 0.163 0.034 0.081 0.092 0.000 0.000 0.408 TOTAL HOURS OF VALID OBSERVATIONS 2174.000 TOTAL HOURS OF GROUND LEVEL RELEASE 282.180 TOTAL HOURS OF STABILITY CLASS A 12.330 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS A 8.870 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTION MEASURED AT 10.50 METER LEVEL WIND SPEED MEASURED AT 10.50 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2020/05/05 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS B (-1.9< DELTA T<=-1.7 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE JAN 1, 2020 - MAR 31, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.018 0.013 0.000 0.000 0.000 0.031 NNE 0.000 0.000 0.000 0.000 0.017 0.030 0.000 0.000 0.000 0.047 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.004 0.000 0.000 0.000 0.000 0.004 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.000 0.000 0.020 0.000 0.000 0.000 0.000 0.000 0.020 SSE 0.000 0.000 0.007 0.006 0.000 0.000 0.000 0.000 0.000 0.013 S 0.000 0.000 0.003 0.000 0.000 0.000 0.000 0.000 0.000 0.003 SSW 0.000 0.000 0.000 0.006 0.000 0.000 0.000 0.000 0.000 0.006 SW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.005 0.000 0.020 0.000 0.000 0.000 0.025 WNW 0.000 0.000 0.000 0.000 0.000 0.039 0.026 0.000 0.000 0.065 NW 0.000 0.000 0.000 0.000 0.000 0.015 0.057 0.000 0.000 0.072 NNW 0.000 0.000 0.000 0.000 0.003 0.017 0.000 0.000 0.000 0.020 SUBTOTAL 0.000 0.000 0.010 0.039 0.042 0.134 0.083 0.000 0.000 0.308 TOTAL HOURS OF VALID OBSERVATIONS 2174.000 TOTAL HOURS OF GROUND LEVEL RELEASE 282.180 TOTAL HOURS OF STABILITY CLASS B 22.340 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS B 6.690 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTION MEASURED AT 10.50 METER LEVEL WIND SPEED MEASURED AT 10.50 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2020/05/05 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS C (-1.7< DELTA T<=-1.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE JAN 1, 2020 - MAR 31, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.004 0.029 0.006 0.000 0.000 0.000 0.039 NNE 0.000 0.000 0.000 0.000 0.004 0.007 0.000 0.000 0.000 0.011 NE 0.000 0.000 0.000 0.000 0.006 0.006 0.000 0.000 0.000 0.013 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.000 0.010 0.034 0.000 0.000 0.000 0.000 0.000 0.044 SSE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 S 0.000 0.000 0.004 0.000 0.000 0.000 0.000 0.000 0.000 0.004 SSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SW 0.000 0.000 0.000 0.006 0.000 0.000 0.000 0.000 0.000 0.006 WSW 0.000 0.000 0.000 0.000 0.007 0.017 0.000 0.000 0.000 0.024 W 0.000 0.000 0.000 0.000 0.000 0.014 0.000 0.000 0.000 0.014 WNW 0.000 0.000 0.000 0.000 0.000 0.046 0.038 0.000 0.000 0.084 NW 0.000 0.000 0.000 0.000 0.000 0.045 0.056 0.000 0.000 0.101 NNW 0.000 0.000 0.000 0.000 0.011 0.000 0.018 0.000 0.000 0.029 SUBTOTAL 0.000 0.000 0.014 0.043 0.057 0.141 0.112 0.000 0.000 0.368 TOTAL HOURS OF VALID OBSERVATIONS 2174.000 TOTAL HOURS OF GROUND LEVEL RELEASE 282.180 TOTAL HOURS OF STABILITY CLASS C 59.900 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS C 7.990 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTION MEASURED AT 10.50 METER LEVEL WIND SPEED MEASURED AT 10.50 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2020/05/05 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS D (-1.5< DELTA T<=-0.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE JAN 1, 2020 - MAR 31, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.038 0.224 0.110 0.000 0.000 0.000 0.372 NNE 0.000 0.000 0.002 0.032 0.142 0.240 0.000 0.000 0.000 0.416 NE 0.000 0.000 0.000 0.024 0.063 0.116 0.000 0.000 0.000 0.203 ENE 0.000 0.000 0.000 0.005 0.002 0.000 0.000 0.000 0.000 0.007 E 0.000 0.000 0.000 0.002 0.005 0.000 0.000 0.000 0.000 0.007 ESE 0.000 0.000 0.009 0.044 0.000 0.000 0.000 0.000 0.000 0.052 SE 0.000 0.000 0.031 0.141 0.025 0.000 0.000 0.000 0.000 0.197 SSE 0.000 0.000 0.091 0.117 0.049 0.000 0.000 0.000 0.000 0.257 S 0.000 0.000 0.022 0.007 0.034 0.000 0.000 0.000 0.000 0.063 SSW 0.000 0.000 0.027 0.028 0.000 0.000 0.000 0.000 0.000 0.055 SW 0.000 0.000 0.010 0.006 0.000 0.000 0.000 0.000 0.000 0.016 WSW 0.000 0.000 0.004 0.035 0.064 0.009 0.000 0.000 0.000 0.112 W 0.000 0.000 0.009 0.049 0.136 0.097 0.000 0.000 0.000 0.290 WNW 0.000 0.000 0.000 0.005 0.040 0.207 0.156 0.074 0.000 0.482 NW 0.000 0.000 0.000 0.007 0.050 0.277 0.351 0.082 0.000 0.767 NNW 0.000 0.000 0.000 0.002 0.081 0.247 0.035 0.000 0.000 0.365 SUBTOTAL 0.000 0.000 0.204 0.543 0.916 1.302 0.543 0.155 0.000 3.663 TOTAL HOURS OF VALID OBSERVATIONS 2174.000 TOTAL HOURS OF GROUND LEVEL RELEASE 282.180 TOTAL HOURS OF STABILITY CLASS D 792.060 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS D 79.640 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTION MEASURED AT 10.50 METER LEVEL WIND SPEED MEASURED AT 10.50 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2020/05/05 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS E (-0.5< DELTA T<= 1.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE JAN 1, 2020 - MAR 31, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.017 0.040 0.105 0.027 0.000 0.000 0.000 0.189 NNE 0.000 0.000 0.014 0.068 0.081 0.052 0.000 0.000 0.000 0.216 NE 0.000 0.000 0.004 0.044 0.034 0.037 0.018 0.000 0.000 0.137 ENE 0.000 0.000 0.000 0.015 0.023 0.006 0.000 0.000 0.000 0.044 E 0.000 0.000 0.029 0.026 0.006 0.000 0.000 0.000 0.000 0.061 ESE 0.000 0.005 0.120 0.060 0.041 0.000 0.000 0.000 0.000 0.226 SE 0.000 0.016 0.236 0.089 0.013 0.000 0.000 0.000 0.000 0.354 SSE 0.000 0.017 0.325 0.420 0.196 0.000 0.000 0.000 0.000 0.957 S 0.000 0.009 0.177 0.260 0.274 0.040 0.000 0.000 0.000 0.759 SSW 0.000 0.000 0.034 0.067 0.019 0.000 0.000 0.000 0.000 0.120 SW 0.000 0.000 0.028 0.008 0.000 0.000 0.000 0.000 0.000 0.036 WSW 0.000 0.000 0.035 0.053 0.007 0.000 0.000 0.000 0.000 0.096 W 0.000 0.000 0.029 0.064 0.049 0.017 0.018 0.000 0.000 0.177 WNW 0.000 0.000 0.014 0.033 0.043 0.068 0.075 0.000 0.000 0.231 NW 0.000 0.000 0.002 0.017 0.020 0.116 0.106 0.000 0.000 0.263 NNW 0.000 0.000 0.021 0.052 0.021 0.048 0.000 0.000 0.000 0.142 SUBTOTAL 0.000 0.046 1.086 1.316 0.934 0.410 0.218 0.000 0.000 4.009 TOTAL HOURS OF VALID OBSERVATIONS 2174.000 TOTAL HOURS OF GROUND LEVEL RELEASE 282.180 TOTAL HOURS OF STABILITY CLASS E 963.170 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS E 87.150 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTION MEASURED AT 10.50 METER LEVEL WIND SPEED MEASURED AT 10.50 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2020/05/05 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS F ( 1.5< DELTA T<= 4.0 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE JAN 1, 2020 - MAR 31, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.026 0.020 0.008 0.000 0.000 0.000 0.000 0.054 NNE 0.000 0.000 0.021 0.008 0.015 0.008 0.000 0.000 0.000 0.052 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.022 0.003 0.000 0.000 0.000 0.000 0.000 0.025 E 0.000 0.000 0.045 0.014 0.000 0.000 0.000 0.000 0.000 0.059 ESE 0.000 0.017 0.123 0.026 0.000 0.000 0.000 0.000 0.000 0.166 SE 0.000 0.025 0.070 0.058 0.000 0.000 0.000 0.000 0.000 0.153 SSE 0.001 0.015 0.508 0.310 0.090 0.138 0.000 0.000 0.000 1.062 S 0.001 0.011 0.244 0.505 0.316 0.092 0.000 0.000 0.000 1.168 SSW 0.000 0.001 0.009 0.042 0.030 0.078 0.000 0.000 0.000 0.161 SW 0.000 0.006 0.019 0.000 0.000 0.000 0.000 0.000 0.000 0.025 WSW 0.000 0.000 0.006 0.000 0.000 0.000 0.000 0.000 0.000 0.006 W 0.000 0.000 0.004 0.000 0.008 0.010 0.000 0.000 0.000 0.022 WNW 0.000 0.000 0.006 0.005 0.013 0.000 0.000 0.000 0.000 0.023 NW 0.000 0.000 0.012 0.006 0.000 0.000 0.009 0.000 0.000 0.027 NNW 0.000 0.000 0.021 0.014 0.000 0.000 0.000 0.000 0.000 0.035 SUBTOTAL 0.003 0.074 1.137 1.011 0.479 0.326 0.009 0.000 0.000 3.039 TOTAL HOURS OF VALID OBSERVATIONS 2174.000 TOTAL HOURS OF GROUND LEVEL RELEASE 282.180 TOTAL HOURS OF STABILITY CLASS F 280.020 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS F 66.060 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTION MEASURED AT 10.50 METER LEVEL WIND SPEED MEASURED AT 10.50 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2020/05/05 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBES

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SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS G (DELTA T > 4.0 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE JAN 1, 2020 - MAR 31, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.011 0.000 0.000 0.000 0.000 0.000 0.000 0.011 NNE 0.000 0.000 0.003 0.000 0.000 0.000 0.000 0.000 0.000 0.003 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.005 0.001 0.000 0.000 0.000 0.000 0.000 0.006 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.006 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.006 SE 0.000 0.043 0.072 0.000 0.000 0.000 0.000 0.000 0.000 0.115 SSE 0.000 0.025 0.479 0.272 0.091 0.000 0.000 0.000 0.000 0.867 S 0.000 0.000 0.109 0.030 0.013 0.000 0.000 0.000 0.000 0.153 SSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SW 0.000 0.000 0.000 0.000 0.009 0.000 0.000 0.000 0.000 0.009 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.007 0.005 0.000 0.000 0.000 0.000 0.000 0.000 0.012 NNW 0.000 0.000 0.004 0.000 0.000 0.000 0.000 0.000 0.000 0.004 SUBTOTAL 0.000 0.082 0.687 0.304 0.113 0.000 0.000 0.000 0.000 1.186 TOTAL HOURS OF VALID OBSERVATIONS 2174.000 TOTAL HOURS OF GROUND LEVEL RELEASE 282.180 TOTAL HOURS OF STABILITY CLASS G 44.180 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS G 25.780 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTION MEASURED AT 10.50 METER LEVEL WIND SPEED MEASURED AT 10.50 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2020/05/05 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS A (DELTA T<=-1.9 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE JAN 1, 2020 - MAR 31, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.000 0.000 0.000 0.000 0.000 0.038 0.000 0.000 0.038 SSE 0.000 0.000 0.000 0.000 0.000 0.080 0.000 0.000 0.000 0.080 S 0.000 0.000 0.000 0.000 0.000 0.041 0.000 0.000 0.000 0.041 SSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SUBTOTAL 0.000 0.000 0.000 0.000 0.000 0.121 0.038 0.000 0.000 0.159 TOTAL HOURS OF VALID OBSERVATIONS 2174.000 TOTAL HOURS OF ELEVATED RELEASES 1891.820 TOTAL HOURS OF STABILITY CLASS A 12.330 TOTAL HOURS OF ELEVATED STABILITY CLASS A 3.460 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND DIRECTION MEASURED AT 45.74 METER LEVEL WIND SPEED MEASURED AT 45.74 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2020/05/05 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBER

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SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS B (-1.9< DELTA T<=-1.7 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE JAN 1, 2020 - MAR 31, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.040 0.000 0.000 0.000 0.040 NNE 0.000 0.000 0.000 0.000 0.000 0.080 0.037 0.000 0.000 0.117 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.040 0.000 0.000 0.000 0.040 SE 0.000 0.000 0.000 0.000 0.086 0.000 0.000 0.000 0.000 0.086 SSE 0.000 0.000 0.000 0.000 0.000 0.083 0.075 0.000 0.000 0.158 S 0.000 0.000 0.000 0.000 0.000 0.080 0.000 0.000 0.000 0.080 SSW 0.000 0.000 0.000 0.000 0.043 0.042 0.000 0.000 0.000 0.085 SW 0.000 0.000 0.000 0.000 0.043 0.000 0.000 0.000 0.000 0.043 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.000 0.000 0.000 0.037 0.000 0.000 0.037 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.034 0.000 0.034 NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SUBTOTAL 0.000 0.000 0.000 0.000 0.172 0.365 0.149 0.034 0.000 0.720 TOTAL HOURS OF VALID OBSERVATIONS 2174.000 TOTAL HOURS OF ELEVATED RELEASES 1891.820 TOTAL HOURS OF STABILITY CLASS B 22.340 TOTAL HOURS OF ELEVATED STABILITY CLASS B 15.650 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND DIRECTION MEASURED AT 45.74 METER LEVEL WIND SPEED MEASURED AT 45.74 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2020/05/05 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS C (-1.7< DELTA T<=-1.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE JAN 1, 2020 - MAR 31, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.043 0.448 0.000 0.000 0.000 0.491 NNE 0.000 0.000 0.000 0.000 0.043 0.163 0.075 0.000 0.000 0.281 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.091 0.080 0.000 0.000 0.000 0.171 SE 0.000 0.000 0.000 0.000 0.091 0.042 0.000 0.000 0.000 0.133 SSE 0.000 0.000 0.000 0.046 0.046 0.000 0.038 0.000 0.000 0.130 S 0.000 0.000 0.000 0.092 0.000 0.080 0.037 0.000 0.000 0.209 SSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SW 0.000 0.000 0.000 0.000 0.000 0.041 0.000 0.000 0.000 0.041 WSW 0.000 0.000 0.000 0.000 0.000 0.041 0.000 0.000 0.000 0.041 W 0.000 0.000 0.000 0.000 0.000 0.121 0.149 0.000 0.000 0.270 WNW 0.000 0.000 0.000 0.000 0.000 0.121 0.075 0.030 0.000 0.226 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.184 0.169 0.000 0.353 NNW 0.000 0.000 0.000 0.000 0.000 0.041 0.000 0.000 0.000 0.041 SUBTOTAL 0.000 0.000 0.000 0.138 0.313 1.178 0.559 0.199 0.000 2.388 TOTAL HOURS OF VALID OBSERVATIONS 2174.000 TOTAL HOURS OF ELEVATED RELEASES 1891.820 TOTAL HOURS OF STABILITY CLASS C 59.900 TOTAL HOURS OF ELEVATED STABILITY CLASS C 51.910 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND DIRECTION MEASURED AT 45.74 METER LEVEL WIND SPEED MEASURED AT 45.74 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2020/05/05 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBER

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS D (-1.5< DELTA T<=-0.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE JAN 1, 2020 - MAR 31, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.092 0.230 0.087 2.153 1.243 0.027 0.000 3.831 NNE 0.000 0.000 0.276 0.230 0.444 1.995 0.793 0.000 0.000 3.738 NE 0.000 0.000 0.092 0.322 0.663 1.014 0.038 0.000 0.000 2.129 ENE 0.000 0.000 0.230 0.138 0.222 0.041 0.000 0.000 0.000 0.631 E 0.000 0.000 0.092 0.230 0.092 0.083 0.000 0.000 0.000 0.497 ESE 0.000 0.000 0.092 0.460 0.352 0.366 0.076 0.000 0.000 1.345 SE 0.000 0.000 0.046 0.414 0.315 0.321 0.898 0.035 0.000 2.028 SSE 0.000 0.000 0.138 0.552 0.315 0.518 0.339 0.172 0.026 2.060 S 0.000 0.000 0.414 0.322 0.265 0.567 0.076 0.129 0.000 1.773 SSW 0.000 0.000 0.138 0.230 0.175 0.240 0.110 0.000 0.000 0.893 SW 0.000 0.000 0.184 0.276 0.000 0.448 0.000 0.000 0.000 0.908 WSW 0.000 0.000 0.184 0.276 0.310 0.845 0.189 0.000 0.000 1.803 W 0.000 0.000 0.092 0.184 0.258 1.774 0.747 0.000 0.000 3.055 WNW 0.000 0.000 0.092 0.276 0.265 1.363 1.043 0.235 0.029 3.303 NW 0.000 0.000 0.046 0.000 0.046 0.996 1.453 0.465 0.000 3.006 NNW 0.000 0.000 0.138 0.046 0.087 0.682 0.787 0.030 0.000 1.770 SUBTOTAL 0.000 0.000 2.346 4.186 3.894 13.405 7.792 1.093 0.054 32.770 TOTAL HOURS OF VALID OBSERVATIONS 2174.000 TOTAL HOURS OF ELEVATED RELEASES 1891.820 TOTAL HOURS OF STABILITY CLASS D 792.060 TOTAL HOURS OF ELEVATED STABILITY CLASS D 712.420 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND DIRECTION MEASURED AT 45.74 METER LEVEL WIND SPEED MEASURED AT 45.74 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2020/05/05 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBER

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS E (-0.5< DELTA T<= 1.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE JAN 1, 2020 - MAR 31, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.138 0.046 0.173 0.854 0.301 0.000 0.000 1.512 NNE 0.000 0.000 0.184 0.414 0.270 0.651 0.262 0.000 0.000 1.781 NE 0.000 0.000 0.184 0.322 0.798 0.564 0.038 0.000 0.000 1.907 ENE 0.000 0.000 0.092 0.276 0.315 0.285 0.037 0.000 0.000 1.005 E 0.000 0.000 0.138 0.276 0.132 0.081 0.000 0.000 0.000 0.628 ESE 0.000 0.000 0.138 0.414 0.928 0.457 0.114 0.000 0.000 2.050 SE 0.000 0.000 0.230 0.460 0.927 2.251 1.127 0.320 0.010 5.325 SSE 0.000 0.000 0.184 0.322 0.888 1.406 1.315 0.336 0.004 4.454 S 0.000 0.046 0.138 0.506 0.748 1.487 2.457 0.816 0.012 6.211 SSW 0.000 0.000 0.230 0.552 0.263 1.745 1.723 0.356 0.006 4.874 SW 0.000 0.046 0.092 0.690 0.397 0.770 0.038 0.000 0.000 2.034 WSW 0.000 0.046 0.046 0.874 0.533 0.657 0.076 0.036 0.000 2.268 W 0.000 0.000 0.000 0.460 0.793 0.860 0.186 0.028 0.000 2.327 WNW 0.000 0.000 0.184 0.138 0.221 0.606 0.300 0.000 0.000 1.449 NW 0.000 0.000 0.046 0.092 0.441 0.246 0.263 0.086 0.000 1.173 NNW 0.000 0.000 0.046 0.184 0.309 0.646 0.113 0.000 0.000 1.298 SUBTOTAL 0.000 0.138 2.070 6.026 8.136 13.567 8.350 1.977 0.032 40.295 TOTAL HOURS OF VALID OBSERVATIONS 2174.000 TOTAL HOURS OF ELEVATED RELEASES 1891.820 TOTAL HOURS OF STABILITY CLASS E 963.170 TOTAL HOURS OF ELEVATED STABILITY CLASS E 876.020 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND DIRECTION MEASURED AT 45.74 METER LEVEL WIND SPEED MEASURED AT 45.74 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2020/05/05 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBER

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS F ( 1.5< DELTA T<= 4.0 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE JAN 1, 2020 - MAR 31, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.092 0.000 0.043 0.042 0.000 0.000 0.000 0.178 NNE 0.000 0.000 0.092 0.046 0.086 0.000 0.000 0.000 0.000 0.224 NE 0.000 0.000 0.000 0.276 0.134 0.000 0.000 0.000 0.000 0.410 ENE 0.000 0.046 0.092 0.184 0.000 0.040 0.000 0.000 0.000 0.362 E 0.000 0.000 0.000 0.092 0.089 0.042 0.000 0.000 0.000 0.223 ESE 0.000 0.000 0.000 0.046 0.224 0.370 0.000 0.000 0.000 0.640 SE 0.000 0.000 0.046 0.046 0.134 0.966 0.401 0.232 0.010 1.835 SSE 0.000 0.000 0.000 0.046 0.132 0.517 0.823 0.250 0.009 1.777 S 0.000 0.000 0.000 0.230 0.304 0.723 0.786 0.137 0.005 2.184 SSW 0.000 0.000 0.092 0.138 0.088 0.200 0.075 0.000 0.000 0.592 SW 0.000 0.000 0.092 0.000 0.000 0.000 0.037 0.000 0.000 0.129 WSW 0.000 0.000 0.046 0.138 0.000 0.000 0.000 0.000 0.000 0.184 W 0.000 0.000 0.046 0.000 0.088 0.085 0.000 0.000 0.000 0.219 WNW 0.000 0.000 0.092 0.000 0.043 0.124 0.000 0.000 0.000 0.259 NW 0.000 0.000 0.046 0.046 0.178 0.043 0.000 0.000 0.000 0.313 NNW 0.000 0.000 0.000 0.184 0.046 0.083 0.000 0.000 0.000 0.312 SUBTOTAL 0.000 0.046 0.736 1.472 1.589 3.234 2.123 0.618 0.024 9.842 TOTAL HOURS OF VALID OBSERVATIONS 2174.000 TOTAL HOURS OF ELEVATED RELEASES 1891.820 TOTAL HOURS OF STABILITY CLASS F 280.020 TOTAL HOURS OF ELEVATED STABILITY CLASS F 213.960 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND DIRECTION MEASURED AT 45.74 METER LEVEL WIND SPEED MEASURED AT 45.74 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2020/05/05 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBER

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS G (DELTA T > 4.0 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE JAN 1, 2020 - MAR 31, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.046 0.000 0.040 0.000 0.000 0.000 0.086 NNE 0.000 0.000 0.000 0.000 0.045 0.043 0.000 0.000 0.000 0.088 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.092 0.000 0.000 0.000 0.000 0.000 0.000 0.092 ESE 0.000 0.000 0.000 0.000 0.089 0.000 0.000 0.000 0.000 0.089 SE 0.000 0.000 0.092 0.000 0.046 0.000 0.000 0.000 0.000 0.138 SSE 0.000 0.000 0.092 0.000 0.000 0.000 0.110 0.000 0.000 0.202 S 0.000 0.000 0.000 0.000 0.000 0.000 0.151 0.000 0.000 0.151 SSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SUBTOTAL 0.000 0.000 0.276 0.046 0.180 0.083 0.262 0.000 0.000 0.846 TOTAL HOURS OF VALID OBSERVATIONS 2174.000 TOTAL HOURS OF ELEVATED RELEASES 1891.820 TOTAL HOURS OF STABILITY CLASS G 44.180 TOTAL HOURS OF ELEVATED STABILITY CLASS G 18.400 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND DIRECTION MEASURED AT 45.74 METER LEVEL WIND SPEED MEASURED AT 45.74 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2020/05/05 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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Table7B2ndQuarterJFDSplitLevelReleases JointFrequencyDistributionInPercent (GroundLevelReleaseModeandElevatedReleaseMode)

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS A (DELTA T<=-1.9 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE APR 1, 2020 - JUN 30, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.071 0.000 0.000 0.000 0.071 NNE 0.000 0.000 0.000 0.000 0.000 0.008 0.000 0.000 0.000 0.008 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.005 0.000 0.000 0.000 0.000 0.000 0.005 ESE 0.000 0.000 0.022 0.027 0.000 0.000 0.000 0.000 0.000 0.049 SE 0.000 0.000 0.041 0.027 0.000 0.000 0.000 0.000 0.000 0.069 SSE 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.047 S 0.000 0.000 0.038 0.009 0.000 0.000 0.000 0.000 0.000 0.047 SSW 0.000 0.000 0.004 0.008 0.000 0.000 0.000 0.000 0.000 0.011 SW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.069 0.064 0.000 0.133 NNW 0.000 0.000 0.000 0.000 0.000 0.035 0.022 0.000 0.000 0.058 SUBTOTAL 0.000 0.000 0.152 0.077 0.000 0.115 0.092 0.064 0.000 0.498 TOTAL HOURS OF VALID OBSERVATIONS 2183.000 TOTAL HOURS OF GROUND LEVEL RELEASE 192.980 TOTAL HOURS OF STABILITY CLASS A 18.190 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS A 10.880 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTION MEASURED AT 10.50 METER LEVEL WIND SPEED MEASURED AT 10.50 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2020/08/10 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS B (-1.9< DELTA T<=-1.7 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE APR 1, 2020 - JUN 30, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.038 0.000 0.000 0.000 0.038 NNE 0.000 0.000 0.000 0.000 0.007 0.066 0.000 0.000 0.000 0.073 NE 0.000 0.000 0.000 0.000 0.000 0.025 0.000 0.000 0.000 0.025 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.008 0.047 0.000 0.000 0.000 0.000 0.000 0.055 SE 0.000 0.000 0.021 0.008 0.000 0.000 0.000 0.000 0.000 0.029 SSE 0.000 0.000 0.028 0.003 0.000 0.000 0.000 0.000 0.000 0.031 S 0.000 0.000 0.017 0.009 0.000 0.000 0.000 0.000 0.000 0.026 SSW 0.000 0.000 0.010 0.008 0.000 0.000 0.000 0.000 0.000 0.017 SW 0.000 0.000 0.011 0.005 0.000 0.000 0.000 0.000 0.000 0.016 WSW 0.000 0.000 0.003 0.008 0.000 0.000 0.000 0.000 0.000 0.011 W 0.000 0.000 0.000 0.000 0.005 0.000 0.000 0.000 0.000 0.005 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.032 0.000 0.000 0.032 NW 0.000 0.000 0.000 0.000 0.002 0.036 0.048 0.036 0.000 0.122 NNW 0.000 0.000 0.000 0.000 0.005 0.055 0.011 0.000 0.000 0.071 SUBTOTAL 0.000 0.000 0.098 0.088 0.018 0.221 0.091 0.036 0.000 0.552 TOTAL HOURS OF VALID OBSERVATIONS 2183.000 TOTAL HOURS OF GROUND LEVEL RELEASE 192.980 TOTAL HOURS OF STABILITY CLASS B 43.410 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS B 12.050 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTION MEASURED AT 10.50 METER LEVEL WIND SPEED MEASURED AT 10.50 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2020/08/10 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS C (-1.7< DELTA T<=-1.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE APR 1, 2020 - JUN 30, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.001 0.010 0.038 0.000 0.000 0.000 0.048 NNE 0.000 0.000 0.000 0.000 0.024 0.044 0.000 0.000 0.000 0.069 NE 0.000 0.000 0.000 0.000 0.000 0.027 0.019 0.000 0.000 0.045 ENE 0.000 0.000 0.000 0.000 0.005 0.000 0.000 0.000 0.000 0.005 E 0.000 0.000 0.000 0.004 0.000 0.000 0.000 0.000 0.000 0.004 ESE 0.000 0.000 0.004 0.020 0.016 0.000 0.000 0.000 0.000 0.039 SE 0.000 0.000 0.019 0.000 0.000 0.000 0.000 0.000 0.000 0.019 SSE 0.000 0.000 0.011 0.000 0.000 0.000 0.000 0.000 0.000 0.011 S 0.000 0.000 0.032 0.000 0.000 0.000 0.000 0.000 0.000 0.032 SSW 0.000 0.000 0.008 0.017 0.000 0.000 0.000 0.000 0.000 0.025 SW 0.000 0.000 0.004 0.000 0.000 0.000 0.000 0.000 0.000 0.004 WSW 0.000 0.000 0.000 0.026 0.006 0.000 0.000 0.000 0.000 0.032 W 0.000 0.000 0.000 0.017 0.028 0.009 0.000 0.000 0.000 0.055 WNW 0.000 0.000 0.000 0.000 0.005 0.030 0.027 0.000 0.000 0.062 NW 0.000 0.000 0.000 0.000 0.003 0.044 0.101 0.000 0.000 0.148 NNW 0.000 0.000 0.000 0.000 0.018 0.024 0.000 0.000 0.000 0.042 SUBTOTAL 0.000 0.000 0.077 0.085 0.116 0.215 0.146 0.000 0.000 0.639 TOTAL HOURS OF VALID OBSERVATIONS 2183.000 TOTAL HOURS OF GROUND LEVEL RELEASE 192.980 TOTAL HOURS OF STABILITY CLASS C 100.100 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS C 13.960 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTION MEASURED AT 10.50 METER LEVEL WIND SPEED MEASURED AT 10.50 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2020/08/10 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS D (-1.5< DELTA T<=-0.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE APR 1, 2020 - JUN 30, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.013 0.069 0.052 0.024 0.000 0.000 0.158 NNE 0.000 0.000 0.000 0.021 0.064 0.052 0.000 0.000 0.000 0.137 NE 0.000 0.000 0.000 0.002 0.034 0.057 0.000 0.000 0.000 0.093 ENE 0.000 0.000 0.000 0.004 0.004 0.006 0.000 0.000 0.000 0.014 E 0.000 0.000 0.026 0.086 0.037 0.010 0.000 0.000 0.000 0.158 ESE 0.000 0.000 0.109 0.186 0.045 0.019 0.000 0.000 0.000 0.359 SE 0.000 0.000 0.056 0.025 0.000 0.000 0.000 0.000 0.000 0.081 SSE 0.000 0.004 0.129 0.020 0.000 0.000 0.000 0.000 0.000 0.153 S 0.000 0.000 0.071 0.026 0.000 0.000 0.000 0.000 0.000 0.096 SSW 0.000 0.000 0.110 0.060 0.000 0.000 0.000 0.000 0.000 0.171 SW 0.000 0.000 0.027 0.019 0.000 0.000 0.000 0.000 0.000 0.046 WSW 0.000 0.000 0.006 0.049 0.020 0.025 0.000 0.000 0.000 0.101 W 0.000 0.000 0.006 0.102 0.109 0.164 0.022 0.000 0.000 0.404 WNW 0.000 0.000 0.009 0.005 0.048 0.208 0.235 0.000 0.000 0.505 NW 0.000 0.000 0.000 0.007 0.058 0.273 0.105 0.000 0.000 0.443 NNW 0.000 0.000 0.000 0.018 0.052 0.070 0.059 0.000 0.000 0.198 SUBTOTAL 0.000 0.004 0.550 0.642 0.540 0.936 0.445 0.000 0.000 3.117 TOTAL HOURS OF VALID OBSERVATIONS 2183.000 TOTAL HOURS OF GROUND LEVEL RELEASE 192.980 TOTAL HOURS OF STABILITY CLASS D 971.540 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS D 68.040 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTION MEASURED AT 10.50 METER LEVEL WIND SPEED MEASURED AT 10.50 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2020/08/10 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS E (-0.5< DELTA T<= 1.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE APR 1, 2020 - JUN 30, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.051 0.058 0.024 0.008 0.000 0.000 0.000 0.142 NNE 0.000 0.000 0.033 0.062 0.016 0.009 0.000 0.000 0.000 0.119 NE 0.000 0.000 0.005 0.020 0.006 0.007 0.000 0.000 0.000 0.038 ENE 0.000 0.002 0.060 0.040 0.007 0.000 0.000 0.000 0.000 0.109 E 0.000 0.011 0.226 0.257 0.094 0.018 0.000 0.000 0.000 0.605 ESE 0.000 0.015 0.279 0.131 0.081 0.023 0.000 0.000 0.000 0.529 SE 0.000 0.007 0.078 0.050 0.000 0.000 0.000 0.000 0.000 0.136 SSE 0.000 0.008 0.138 0.030 0.000 0.000 0.000 0.000 0.000 0.176 S 0.000 0.006 0.126 0.015 0.000 0.000 0.000 0.000 0.000 0.148 SSW 0.000 0.005 0.079 0.037 0.000 0.000 0.000 0.000 0.000 0.121 SW 0.000 0.000 0.025 0.000 0.000 0.000 0.000 0.000 0.000 0.025 WSW 0.000 0.000 0.011 0.022 0.000 0.016 0.000 0.000 0.000 0.049 W 0.000 0.000 0.015 0.066 0.027 0.008 0.000 0.000 0.000 0.115 WNW 0.000 0.000 0.001 0.004 0.012 0.007 0.000 0.000 0.000 0.024 NW 0.000 0.000 0.007 0.016 0.037 0.033 0.000 0.000 0.000 0.093 NNW 0.000 0.000 0.032 0.055 0.065 0.093 0.026 0.000 0.000 0.269 SUBTOTAL 0.000 0.054 1.165 0.862 0.369 0.223 0.026 0.000 0.000 2.698 TOTAL HOURS OF VALID OBSERVATIONS 2183.000 TOTAL HOURS OF GROUND LEVEL RELEASE 192.980 TOTAL HOURS OF STABILITY CLASS E 717.580 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS E 58.900 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTION MEASURED AT 10.50 METER LEVEL WIND SPEED MEASURED AT 10.50 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2020/08/10 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS F ( 1.5< DELTA T<= 4.0 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE APR 1, 2020 - JUN 30, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.095 0.041 0.000 0.000 0.000 0.000 0.000 0.136 NNE 0.000 0.000 0.048 0.090 0.008 0.000 0.000 0.000 0.000 0.145 NE 0.000 0.006 0.022 0.004 0.000 0.000 0.000 0.000 0.000 0.032 ENE 0.000 0.010 0.025 0.012 0.000 0.000 0.000 0.000 0.000 0.047 E 0.000 0.014 0.101 0.022 0.008 0.000 0.000 0.000 0.000 0.145 ESE 0.000 0.019 0.045 0.036 0.009 0.000 0.000 0.000 0.000 0.109 SE 0.000 0.029 0.032 0.022 0.000 0.000 0.000 0.000 0.000 0.083 SSE 0.000 0.005 0.033 0.000 0.000 0.000 0.000 0.000 0.000 0.038 S 0.000 0.007 0.033 0.000 0.000 0.000 0.000 0.000 0.000 0.041 SSW 0.000 0.010 0.019 0.000 0.000 0.000 0.000 0.000 0.000 0.029 SW 0.000 0.000 0.004 0.000 0.000 0.000 0.000 0.000 0.000 0.004 WSW 0.000 0.000 0.004 0.007 0.000 0.000 0.000 0.000 0.000 0.011 W 0.000 0.000 0.001 0.000 0.000 0.000 0.000 0.000 0.000 0.001 WNW 0.000 0.000 0.004 0.004 0.000 0.008 0.000 0.000 0.000 0.016 NW 0.000 0.000 0.003 0.000 0.000 0.000 0.000 0.000 0.000 0.003 NNW 0.000 0.000 0.047 0.049 0.000 0.000 0.000 0.000 0.000 0.096 SUBTOTAL 0.000 0.101 0.517 0.285 0.025 0.008 0.000 0.000 0.000 0.936 TOTAL HOURS OF VALID OBSERVATIONS 2183.000 TOTAL HOURS OF GROUND LEVEL RELEASE 192.980 TOTAL HOURS OF STABILITY CLASS F 253.260 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS F 20.430 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTION MEASURED AT 10.50 METER LEVEL WIND SPEED MEASURED AT 10.50 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2020/08/10 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS G (DELTA T > 4.0 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE APR 1, 2020 - JUN 30, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.016 0.071 0.021 0.000 0.000 0.000 0.000 0.000 0.109 NNE 0.000 0.004 0.027 0.008 0.000 0.000 0.000 0.000 0.000 0.039 NE 0.000 0.004 0.037 0.000 0.000 0.000 0.000 0.000 0.000 0.040 ENE 0.000 0.016 0.020 0.002 0.000 0.000 0.000 0.000 0.000 0.038 E 0.000 0.038 0.007 0.000 0.000 0.000 0.000 0.000 0.000 0.044 ESE 0.000 0.014 0.015 0.000 0.000 0.000 0.000 0.000 0.000 0.029 SE 0.000 0.025 0.013 0.000 0.000 0.000 0.000 0.000 0.000 0.038 SSE 0.000 0.001 0.004 0.000 0.000 0.000 0.000 0.000 0.000 0.005 S 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SW 0.000 0.007 0.000 0.008 0.000 0.000 0.000 0.000 0.000 0.015 WSW 0.000 0.005 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.005 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.000 0.000 0.006 0.000 0.000 0.000 0.000 0.006 NW 0.000 0.005 0.002 0.000 0.000 0.000 0.000 0.000 0.000 0.008 NNW 0.000 0.001 0.009 0.014 0.000 0.000 0.000 0.000 0.000 0.024 SUBTOTAL 0.000 0.135 0.205 0.053 0.006 0.000 0.000 0.000 0.000 0.399 TOTAL HOURS OF VALID OBSERVATIONS 2183.000 TOTAL HOURS OF GROUND LEVEL RELEASE 192.980 TOTAL HOURS OF STABILITY CLASS G 78.920 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS G 8.720 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTION MEASURED AT 10.50 METER LEVEL WIND SPEED MEASURED AT 10.50 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2020/08/10 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS A (DELTA T<=-1.9 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE APR 1, 2020 - JUN 30, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.000 0.038 0.000 0.000 0.038 NNE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.000 0.000 0.000 0.000 0.039 0.000 0.000 0.000 0.039 SSE 0.000 0.000 0.000 0.000 0.044 0.083 0.000 0.000 0.000 0.128 S 0.000 0.000 0.000 0.000 0.045 0.039 0.000 0.000 0.000 0.084 SSW 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.046 SW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SUBTOTAL 0.000 0.000 0.000 0.046 0.089 0.162 0.038 0.000 0.000 0.335 TOTAL HOURS OF VALID OBSERVATIONS 2183.000 TOTAL HOURS OF ELEVATED RELEASES 1990.020 TOTAL HOURS OF STABILITY CLASS A 18.190 TOTAL HOURS OF ELEVATED STABILITY CLASS A 7.310 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND DIRECTION MEASURED AT 45.74 METER LEVEL WIND SPEED MEASURED AT 45.74 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2020/08/10 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS B (-1.9< DELTA T<=-1.7 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE APR 1, 2020 - JUN 30, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.273 0.113 0.000 0.000 0.387 NNE 0.000 0.000 0.000 0.000 0.000 0.079 0.038 0.000 0.000 0.116 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.000 0.000 0.046 0.043 0.122 0.000 0.000 0.000 0.211 SSE 0.000 0.000 0.000 0.046 0.044 0.000 0.000 0.000 0.000 0.089 S 0.000 0.000 0.000 0.092 0.134 0.043 0.000 0.000 0.000 0.268 SSW 0.000 0.000 0.000 0.137 0.000 0.000 0.000 0.000 0.000 0.137 SW 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.046 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.046 0.000 0.000 0.037 0.034 0.000 0.116 NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.038 0.027 0.000 0.066 SUBTOTAL 0.000 0.000 0.000 0.412 0.221 0.517 0.225 0.061 0.000 1.437 TOTAL HOURS OF VALID OBSERVATIONS 2183.000 TOTAL HOURS OF ELEVATED RELEASES 1990.020 TOTAL HOURS OF STABILITY CLASS B 43.410 TOTAL HOURS OF ELEVATED STABILITY CLASS B 31.360 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND DIRECTION MEASURED AT 45.74 METER LEVEL WIND SPEED MEASURED AT 45.74 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2020/08/10 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS C (-1.7< DELTA T<=-1.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE APR 1, 2020 - JUN 30, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.599 0.076 0.000 0.000 0.675 NNE 0.000 0.000 0.000 0.000 0.044 0.518 0.410 0.000 0.000 0.972 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.042 0.000 0.000 0.000 0.042 SE 0.000 0.000 0.000 0.046 0.220 0.325 0.000 0.000 0.000 0.591 SSE 0.000 0.000 0.000 0.000 0.000 0.041 0.038 0.000 0.000 0.079 S 0.000 0.000 0.000 0.092 0.131 0.125 0.000 0.000 0.000 0.348 SSW 0.000 0.000 0.000 0.137 0.000 0.082 0.038 0.000 0.000 0.258 SW 0.000 0.000 0.000 0.046 0.131 0.042 0.000 0.000 0.000 0.219 WSW 0.000 0.000 0.000 0.000 0.044 0.000 0.000 0.000 0.000 0.044 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.074 0.069 0.000 0.142 NW 0.000 0.000 0.000 0.000 0.000 0.079 0.111 0.072 0.010 0.273 NNW 0.000 0.000 0.000 0.000 0.000 0.242 0.038 0.023 0.000 0.303 SUBTOTAL 0.000 0.000 0.000 0.321 0.570 2.096 0.786 0.164 0.010 3.946 TOTAL HOURS OF VALID OBSERVATIONS 2183.000 TOTAL HOURS OF ELEVATED RELEASES 1990.020 TOTAL HOURS OF STABILITY CLASS C 100.100 TOTAL HOURS OF ELEVATED STABILITY CLASS C 86.140 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND DIRECTION MEASURED AT 45.74 METER LEVEL WIND SPEED MEASURED AT 45.74 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2020/08/10 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS D (-1.5< DELTA T<=-0.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE APR 1, 2020 - JUN 30, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.183 0.183 0.395 0.481 0.297 0.050 0.000 1.590 NNE 0.000 0.000 0.046 0.183 0.663 0.838 0.189 0.000 0.000 1.919 NE 0.000 0.000 0.092 0.137 0.175 0.370 0.000 0.000 0.000 0.773 ENE 0.000 0.000 0.137 0.137 0.177 0.081 0.000 0.000 0.000 0.532 E 0.000 0.000 0.183 0.183 0.044 0.082 0.000 0.000 0.000 0.493 ESE 0.000 0.000 0.092 0.412 0.396 0.765 0.150 0.036 0.000 1.851 SE 0.000 0.000 0.229 0.870 0.798 1.157 0.747 0.130 0.000 3.932 SSE 0.000 0.000 0.504 0.916 0.304 0.737 0.707 0.036 0.008 3.212 S 0.000 0.046 0.641 1.237 0.568 1.165 0.965 0.030 0.000 4.652 SSW 0.000 0.000 0.412 0.825 0.485 0.921 0.524 0.066 0.000 3.233 SW 0.000 0.046 0.641 1.420 0.397 0.656 0.076 0.000 0.000 3.237 WSW 0.000 0.000 0.229 0.916 0.624 1.268 0.075 0.055 0.000 3.167 W 0.000 0.000 0.137 0.962 0.895 1.126 0.597 0.052 0.000 3.769 WNW 0.000 0.000 0.046 0.504 0.574 1.200 1.038 0.312 0.000 3.675 NW 0.000 0.000 0.046 0.504 0.482 1.049 1.308 0.162 0.000 3.552 NNW 0.000 0.000 0.092 0.229 0.306 0.726 0.336 0.114 0.000 1.802 SUBTOTAL 0.000 0.092 3.710 9.620 7.285 12.620 7.009 1.044 0.008 41.388 TOTAL HOURS OF VALID OBSERVATIONS 2183.000 TOTAL HOURS OF ELEVATED RELEASES 1990.020 TOTAL HOURS OF STABILITY CLASS D 971.540 TOTAL HOURS OF ELEVATED STABILITY CLASS D 903.500 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND DIRECTION MEASURED AT 45.74 METER LEVEL WIND SPEED MEASURED AT 45.74 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2020/08/10 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS E (-0.5< DELTA T<= 1.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE APR 1, 2020 - JUN 30, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.183 0.412 0.310 0.771 0.150 0.000 0.000 1.827 NNE 0.000 0.000 0.092 0.137 0.265 1.122 0.150 0.000 0.000 1.767 NE 0.000 0.000 0.046 0.412 0.174 0.327 0.000 0.000 0.000 0.959 ENE 0.000 0.000 0.092 0.183 0.265 0.329 0.000 0.000 0.000 0.869 E 0.000 0.000 0.229 0.137 0.307 0.370 0.000 0.000 0.000 1.044 ESE 0.000 0.000 0.183 0.229 0.882 1.537 0.449 0.000 0.000 3.280 SE 0.000 0.000 0.229 0.550 1.271 2.097 0.861 0.118 0.000 5.125 SSE 0.000 0.000 0.229 0.504 0.617 1.205 0.414 0.169 0.000 3.138 S 0.000 0.000 0.275 0.733 0.311 0.917 0.520 0.053 0.000 2.808 SSW 0.000 0.000 0.275 0.275 0.351 0.933 0.189 0.000 0.000 2.023 SW 0.000 0.000 0.183 0.550 0.399 0.361 0.000 0.000 0.000 1.492 WSW 0.000 0.000 0.137 0.458 0.536 0.162 0.038 0.030 0.000 1.361 W 0.000 0.000 0.092 0.275 0.216 0.531 0.038 0.000 0.000 1.151 WNW 0.000 0.000 0.229 0.183 0.266 0.000 0.000 0.000 0.000 0.678 NW 0.000 0.000 0.046 0.092 0.307 0.563 0.038 0.000 0.000 1.044 NNW 0.000 0.000 0.046 0.183 0.267 0.719 0.373 0.020 0.000 1.607 SUBTOTAL 0.000 0.000 2.565 5.314 6.741 11.945 3.219 0.389 0.000 30.173 TOTAL HOURS OF VALID OBSERVATIONS 2183.000 TOTAL HOURS OF ELEVATED RELEASES 1990.020 TOTAL HOURS OF STABILITY CLASS E 717.580 TOTAL HOURS OF ELEVATED STABILITY CLASS E 658.680 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND DIRECTION MEASURED AT 45.74 METER LEVEL WIND SPEED MEASURED AT 45.74 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2020/08/10 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS F ( 1.5< DELTA T<= 4.0 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE APR 1, 2020 - JUN 30, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.003 0.000 0.092 0.046 0.044 0.594 0.000 0.000 0.000 0.778 NNE 0.003 0.000 0.092 0.092 0.046 0.680 0.000 0.000 0.000 0.912 NE 0.000 0.000 0.000 0.092 0.131 0.326 0.000 0.000 0.000 0.549 ENE 0.002 0.000 0.046 0.183 0.399 0.368 0.000 0.000 0.000 0.998 E 0.003 0.000 0.092 0.092 0.392 0.080 0.000 0.000 0.000 0.658 ESE 0.005 0.000 0.137 0.229 0.310 0.043 0.000 0.000 0.000 0.724 SE 0.006 0.000 0.183 0.412 0.531 0.201 0.038 0.000 0.000 1.372 SSE 0.002 0.000 0.046 0.321 0.263 0.117 0.373 0.000 0.000 1.122 S 0.005 0.000 0.137 0.137 0.132 0.442 0.000 0.000 0.000 0.853 SSW 0.002 0.000 0.046 0.092 0.087 0.204 0.000 0.000 0.000 0.430 SW 0.002 0.000 0.046 0.046 0.090 0.000 0.038 0.000 0.000 0.221 WSW 0.002 0.000 0.046 0.000 0.000 0.084 0.000 0.000 0.000 0.131 W 0.005 0.046 0.092 0.092 0.045 0.000 0.000 0.000 0.000 0.279 WNW 0.002 0.000 0.046 0.183 0.088 0.082 0.038 0.000 0.000 0.438 NW 0.002 0.000 0.046 0.092 0.349 0.042 0.000 0.000 0.000 0.530 NNW 0.006 0.000 0.183 0.000 0.000 0.443 0.038 0.000 0.000 0.670 SUBTOTAL 0.046 0.046 1.328 2.107 2.907 3.706 0.525 0.000 0.000 10.666 TOTAL HOURS OF VALID OBSERVATIONS 2183.000 TOTAL HOURS OF ELEVATED RELEASES 1990.020 TOTAL HOURS OF STABILITY CLASS F 253.260 TOTAL HOURS OF ELEVATED STABILITY CLASS F 232.830 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND DIRECTION MEASURED AT 45.74 METER LEVEL WIND SPEED MEASURED AT 45.74 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2020/08/10 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS G (DELTA T > 4.0 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE APR 1, 2020 - JUN 30, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.137 0.000 0.000 0.000 0.000 0.000 0.000 0.137 NNE 0.000 0.000 0.000 0.137 0.133 0.158 0.152 0.000 0.000 0.581 NE 0.000 0.000 0.092 0.092 0.175 0.123 0.000 0.000 0.000 0.481 ENE 0.000 0.000 0.046 0.092 0.133 0.125 0.000 0.000 0.000 0.395 E 0.000 0.046 0.046 0.092 0.000 0.000 0.000 0.000 0.000 0.183 ESE 0.000 0.000 0.000 0.000 0.044 0.000 0.000 0.000 0.000 0.044 SE 0.000 0.000 0.046 0.000 0.000 0.124 0.000 0.000 0.000 0.169 SSE 0.000 0.000 0.000 0.046 0.133 0.000 0.000 0.000 0.000 0.179 S 0.000 0.046 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.092 SSW 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.046 SW 0.000 0.000 0.137 0.000 0.000 0.000 0.000 0.000 0.000 0.137 WSW 0.000 0.046 0.092 0.000 0.000 0.000 0.000 0.000 0.000 0.137 W 0.000 0.000 0.000 0.092 0.000 0.000 0.000 0.000 0.000 0.092 WNW 0.000 0.046 0.046 0.000 0.043 0.000 0.000 0.000 0.000 0.135 NW 0.000 0.000 0.046 0.183 0.132 0.000 0.000 0.000 0.000 0.361 NNW 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.046 SUBTOTAL 0.000 0.183 0.779 0.779 0.793 0.530 0.152 0.000 0.000 3.216 TOTAL HOURS OF VALID OBSERVATIONS 2183.000 TOTAL HOURS OF ELEVATED RELEASES 1990.020 TOTAL HOURS OF STABILITY CLASS G 78.920 TOTAL HOURS OF ELEVATED STABILITY CLASS G 70.200 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND DIRECTION MEASURED AT 45.74 METER LEVEL WIND SPEED MEASURED AT 45.74 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2020/08/10 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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Table7C3rdQuarterJFDSplitLevelReleases JointFrequencyDistributionInPercent (GroundLevelReleaseModeAndElevatedReleaseMode)

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS A (DELTA T<=-1.9 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE JUL 1, 2020 - SEP 30, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.005 0.021 0.000 0.000 0.000 0.026 NNE 0.000 0.000 0.000 0.000 0.005 0.021 0.000 0.000 0.000 0.026 NE 0.000 0.000 0.000 0.000 0.000 0.013 0.000 0.000 0.000 0.013 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.005 0.009 0.000 0.000 0.000 0.000 0.000 0.014 ESE 0.000 0.000 0.037 0.059 0.009 0.000 0.000 0.000 0.000 0.105 SE 0.000 0.000 0.066 0.089 0.000 0.000 0.000 0.000 0.000 0.154 SSE 0.000 0.000 0.037 0.032 0.000 0.000 0.000 0.000 0.000 0.069 S 0.000 0.000 0.010 0.067 0.000 0.000 0.000 0.000 0.000 0.077 SSW 0.000 0.000 0.007 0.000 0.000 0.000 0.000 0.000 0.000 0.007 SW 0.000 0.000 0.016 0.007 0.000 0.000 0.000 0.000 0.000 0.023 WSW 0.000 0.000 0.010 0.006 0.015 0.000 0.000 0.000 0.000 0.030 W 0.000 0.000 0.000 0.011 0.051 0.055 0.000 0.000 0.000 0.116 WNW 0.000 0.000 0.000 0.000 0.017 0.072 0.000 0.000 0.000 0.089 NW 0.000 0.000 0.000 0.000 0.005 0.021 0.028 0.000 0.000 0.053 NNW 0.000 0.000 0.000 0.000 0.003 0.081 0.000 0.000 0.000 0.084 SUBTOTAL 0.000 0.000 0.187 0.279 0.109 0.284 0.028 0.000 0.000 0.887 TOTAL HOURS OF VALID OBSERVATIONS 2190.000 TOTAL HOURS OF GROUND LEVEL RELEASE 124.170 TOTAL HOURS OF STABILITY CLASS A 57.220 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS A 19.430 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTION MEASURED AT 10.50 METER LEVEL WIND SPEED MEASURED AT 10.50 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2020/10/13 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS B (-1.9< DELTA T<=-1.7 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE JUL 1, 2020 - SEP 30, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.003 0.000 0.000 0.000 0.000 0.003 NNE 0.000 0.000 0.000 0.000 0.005 0.015 0.000 0.000 0.000 0.020 NE 0.000 0.000 0.000 0.000 0.000 0.006 0.000 0.000 0.000 0.006 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.003 0.008 0.000 0.000 0.000 0.000 0.000 0.011 ESE 0.000 0.000 0.000 0.016 0.000 0.000 0.000 0.000 0.000 0.016 SE 0.000 0.000 0.002 0.003 0.000 0.000 0.000 0.000 0.000 0.005 SSE 0.000 0.000 0.004 0.004 0.000 0.000 0.000 0.000 0.000 0.008 S 0.000 0.000 0.004 0.020 0.000 0.000 0.000 0.000 0.000 0.023 SSW 0.000 0.000 0.000 0.023 0.000 0.000 0.000 0.000 0.000 0.023 SW 0.000 0.000 0.000 0.007 0.000 0.000 0.000 0.000 0.000 0.007 WSW 0.000 0.000 0.000 0.003 0.013 0.000 0.000 0.000 0.000 0.016 W 0.000 0.000 0.000 0.001 0.034 0.013 0.000 0.000 0.000 0.048 WNW 0.000 0.000 0.000 0.001 0.020 0.005 0.000 0.000 0.000 0.026 NW 0.000 0.000 0.000 0.000 0.002 0.015 0.000 0.000 0.000 0.018 NNW 0.000 0.000 0.000 0.000 0.006 0.048 0.000 0.000 0.000 0.054 SUBTOTAL 0.000 0.000 0.013 0.086 0.082 0.103 0.000 0.000 0.000 0.284 TOTAL HOURS OF VALID OBSERVATIONS 2190.000 TOTAL HOURS OF GROUND LEVEL RELEASE 124.170 TOTAL HOURS OF STABILITY CLASS B 67.990 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS B 6.220 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTION MEASURED AT 10.50 METER LEVEL WIND SPEED MEASURED AT 10.50 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2020/10/13 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS C (-1.7< DELTA T<=-1.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE JUL 1, 2020 - SEP 30, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.008 0.000 0.000 0.000 0.008 NNE 0.000 0.000 0.000 0.000 0.015 0.061 0.000 0.000 0.000 0.076 NE 0.000 0.000 0.000 0.000 0.007 0.000 0.000 0.000 0.000 0.007 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.009 0.000 0.000 0.000 0.000 0.009 ESE 0.000 0.000 0.010 0.010 0.008 0.000 0.000 0.000 0.000 0.027 SE 0.000 0.000 0.021 0.000 0.000 0.000 0.000 0.000 0.000 0.021 SSE 0.000 0.000 0.005 0.000 0.000 0.000 0.000 0.000 0.000 0.005 S 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SW 0.000 0.000 0.000 0.023 0.000 0.000 0.000 0.000 0.000 0.023 WSW 0.000 0.000 0.005 0.013 0.006 0.000 0.000 0.000 0.000 0.025 W 0.000 0.000 0.000 0.005 0.028 0.019 0.000 0.000 0.000 0.052 WNW 0.000 0.000 0.000 0.006 0.003 0.025 0.009 0.000 0.000 0.043 NW 0.000 0.000 0.000 0.000 0.003 0.022 0.009 0.000 0.000 0.035 NNW 0.000 0.000 0.000 0.000 0.006 0.016 0.000 0.000 0.000 0.021 SUBTOTAL 0.000 0.000 0.040 0.056 0.085 0.152 0.018 0.000 0.000 0.351 TOTAL HOURS OF VALID OBSERVATIONS 2190.000 TOTAL HOURS OF GROUND LEVEL RELEASE 124.170 TOTAL HOURS OF STABILITY CLASS C 125.690 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS C 7.690 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTION MEASURED AT 10.50 METER LEVEL WIND SPEED MEASURED AT 10.50 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2020/10/13 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS D (-1.5< DELTA T<=-0.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE JUL 1, 2020 - SEP 30, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.003 0.026 0.037 0.024 0.000 0.000 0.000 0.090 NNE 0.000 0.000 0.001 0.010 0.032 0.045 0.000 0.000 0.000 0.088 NE 0.000 0.000 0.000 0.005 0.053 0.023 0.010 0.000 0.000 0.091 ENE 0.000 0.000 0.005 0.002 0.024 0.005 0.000 0.000 0.000 0.037 E 0.000 0.000 0.000 0.055 0.066 0.015 0.000 0.000 0.000 0.136 ESE 0.000 0.000 0.024 0.071 0.000 0.008 0.000 0.000 0.000 0.103 SE 0.000 0.000 0.014 0.012 0.000 0.000 0.000 0.000 0.000 0.026 SSE 0.000 0.000 0.034 0.038 0.000 0.000 0.000 0.000 0.000 0.072 S 0.000 0.000 0.099 0.084 0.000 0.000 0.000 0.000 0.000 0.183 SSW 0.000 0.000 0.066 0.054 0.000 0.000 0.000 0.000 0.000 0.121 SW 0.000 0.000 0.008 0.010 0.000 0.000 0.000 0.000 0.000 0.017 WSW 0.000 0.000 0.013 0.026 0.000 0.008 0.000 0.000 0.000 0.047 W 0.000 0.000 0.011 0.035 0.053 0.008 0.000 0.000 0.000 0.107 WNW 0.000 0.000 0.000 0.004 0.010 0.063 0.000 0.000 0.000 0.076 NW 0.000 0.000 0.000 0.005 0.021 0.032 0.036 0.000 0.000 0.094 NNW 0.000 0.000 0.000 0.023 0.042 0.057 0.000 0.000 0.000 0.122 SUBTOTAL 0.000 0.000 0.279 0.457 0.338 0.289 0.045 0.000 0.000 1.409 TOTAL HOURS OF VALID OBSERVATIONS 2190.000 TOTAL HOURS OF GROUND LEVEL RELEASE 124.170 TOTAL HOURS OF STABILITY CLASS D 893.680 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS D 30.850 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTION MEASURED AT 10.50 METER LEVEL WIND SPEED MEASURED AT 10.50 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2020/10/13 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS E (-0.5< DELTA T<= 1.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE JUL 1, 2020 - SEP 30, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.100 0.116 0.021 0.008 0.000 0.000 0.000 0.245 NNE 0.000 0.000 0.035 0.126 0.112 0.078 0.000 0.000 0.000 0.351 NE 0.000 0.000 0.014 0.038 0.079 0.047 0.000 0.000 0.000 0.179 ENE 0.000 0.003 0.043 0.069 0.011 0.000 0.000 0.000 0.000 0.126 E 0.000 0.002 0.109 0.357 0.082 0.000 0.000 0.000 0.000 0.550 ESE 0.000 0.005 0.047 0.041 0.000 0.000 0.000 0.000 0.000 0.093 SE 0.000 0.000 0.035 0.000 0.000 0.000 0.000 0.000 0.000 0.035 SSE 0.000 0.017 0.050 0.000 0.000 0.000 0.000 0.000 0.000 0.067 S 0.000 0.003 0.065 0.036 0.000 0.000 0.000 0.000 0.000 0.104 SSW 0.000 0.013 0.015 0.000 0.000 0.000 0.000 0.000 0.000 0.027 SW 0.000 0.000 0.004 0.000 0.000 0.000 0.000 0.000 0.000 0.004 WSW 0.000 0.000 0.004 0.020 0.000 0.000 0.000 0.000 0.000 0.024 W 0.000 0.000 0.006 0.033 0.000 0.006 0.000 0.000 0.000 0.045 WNW 0.000 0.000 0.000 0.005 0.017 0.000 0.000 0.000 0.000 0.022 NW 0.000 0.000 0.004 0.006 0.012 0.000 0.000 0.000 0.000 0.022 NNW 0.000 0.000 0.028 0.047 0.022 0.017 0.000 0.000 0.000 0.115 SUBTOTAL 0.000 0.043 0.558 0.894 0.358 0.156 0.000 0.000 0.000 2.010 TOTAL HOURS OF VALID OBSERVATIONS 2190.000 TOTAL HOURS OF GROUND LEVEL RELEASE 124.170 TOTAL HOURS OF STABILITY CLASS E 751.000 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS E 44.010 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTION MEASURED AT 10.50 METER LEVEL WIND SPEED MEASURED AT 10.50 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2020/10/13 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS F ( 1.5< DELTA T<= 4.0 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE JUL 1, 2020 - SEP 30, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.001 0.062 0.029 0.000 0.000 0.000 0.000 0.000 0.092 NNE 0.000 0.001 0.038 0.019 0.008 0.000 0.000 0.000 0.000 0.065 NE 0.000 0.000 0.022 0.008 0.014 0.000 0.000 0.000 0.000 0.044 ENE 0.000 0.001 0.040 0.043 0.000 0.000 0.000 0.000 0.000 0.084 E 0.000 0.000 0.044 0.085 0.000 0.000 0.000 0.000 0.000 0.129 ESE 0.000 0.013 0.008 0.009 0.000 0.000 0.000 0.000 0.000 0.030 SE 0.000 0.006 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.006 SSE 0.000 0.000 0.015 0.000 0.000 0.000 0.000 0.000 0.000 0.015 S 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.004 0.000 0.000 0.000 0.000 0.000 0.004 WNW 0.000 0.000 0.000 0.000 0.005 0.000 0.000 0.000 0.000 0.005 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNW 0.000 0.000 0.032 0.000 0.008 0.000 0.000 0.000 0.000 0.039 SUBTOTAL 0.000 0.022 0.259 0.197 0.034 0.000 0.000 0.000 0.000 0.513 TOTAL HOURS OF VALID OBSERVATIONS 2190.000 TOTAL HOURS OF GROUND LEVEL RELEASE 124.170 TOTAL HOURS OF STABILITY CLASS F 249.450 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS F 11.230 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTION MEASURED AT 10.50 METER LEVEL WIND SPEED MEASURED AT 10.50 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2020/10/13 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS G (DELTA T > 4.0 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE JUL 1, 2020 - SEP 30, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.002 0.093 0.027 0.000 0.000 0.000 0.000 0.000 0.122 NNE 0.000 0.003 0.021 0.011 0.000 0.000 0.000 0.000 0.000 0.035 NE 0.000 0.000 0.014 0.000 0.000 0.000 0.000 0.000 0.000 0.014 ENE 0.000 0.001 0.001 0.013 0.007 0.000 0.000 0.000 0.000 0.023 E 0.000 0.000 0.006 0.000 0.000 0.000 0.000 0.000 0.000 0.006 ESE 0.000 0.000 0.005 0.000 0.000 0.000 0.000 0.000 0.000 0.005 SE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 S 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNW 0.000 0.002 0.010 0.000 0.000 0.000 0.000 0.000 0.000 0.012 SUBTOTAL 0.000 0.009 0.150 0.050 0.007 0.000 0.000 0.000 0.000 0.216 TOTAL HOURS OF VALID OBSERVATIONS 2190.000 TOTAL HOURS OF GROUND LEVEL RELEASE 124.170 TOTAL HOURS OF STABILITY CLASS G 44.970 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS G 4.740 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTION MEASURED AT 10.50 METER LEVEL WIND SPEED MEASURED AT 10.50 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2020/10/13 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS A (DELTA T<=-1.9 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE JUL 1, 2020 - SEP 30, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.038 0.038 0.000 0.000 0.076 NNE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.000 0.000 0.000 0.262 0.440 0.037 0.000 0.000 0.739 SSE 0.000 0.000 0.000 0.091 0.348 0.202 0.038 0.000 0.000 0.679 S 0.000 0.000 0.000 0.000 0.043 0.038 0.000 0.033 0.000 0.115 SSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SW 0.000 0.000 0.000 0.000 0.000 0.040 0.000 0.000 0.000 0.040 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.000 0.000 0.039 0.000 0.000 0.000 0.039 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.037 0.000 0.000 0.037 SUBTOTAL 0.000 0.000 0.000 0.091 0.653 0.798 0.151 0.033 0.000 1.726 TOTAL HOURS OF VALID OBSERVATIONS 2190.000 TOTAL HOURS OF ELEVATED RELEASES 2065.830 TOTAL HOURS OF STABILITY CLASS A 57.220 TOTAL HOURS OF ELEVATED STABILITY CLASS A 37.790 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND DIRECTION MEASURED AT 45.74 METER LEVEL WIND SPEED MEASURED AT 45.74 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2020/10/13 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS B (-1.9< DELTA T<=-1.7 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE JUL 1, 2020 - SEP 30, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.159 0.000 0.000 0.000 0.159 NNE 0.000 0.000 0.000 0.000 0.000 0.159 0.000 0.000 0.000 0.159 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.000 0.000 0.091 0.178 0.242 0.074 0.000 0.000 0.586 SSE 0.000 0.000 0.091 0.228 0.128 0.084 0.037 0.000 0.000 0.568 S 0.000 0.000 0.000 0.046 0.132 0.000 0.074 0.000 0.000 0.251 SSW 0.000 0.000 0.000 0.046 0.044 0.000 0.000 0.000 0.000 0.089 SW 0.000 0.000 0.000 0.000 0.132 0.081 0.000 0.000 0.000 0.213 WSW 0.000 0.000 0.000 0.000 0.000 0.201 0.000 0.000 0.000 0.201 W 0.000 0.000 0.000 0.000 0.000 0.285 0.038 0.000 0.000 0.323 WNW 0.000 0.000 0.000 0.000 0.000 0.077 0.000 0.000 0.000 0.077 NW 0.000 0.000 0.000 0.000 0.000 0.040 0.000 0.000 0.000 0.040 NNW 0.000 0.000 0.000 0.000 0.000 0.117 0.037 0.000 0.000 0.154 SUBTOTAL 0.000 0.000 0.091 0.411 0.613 1.445 0.260 0.000 0.000 2.821 TOTAL HOURS OF VALID OBSERVATIONS 2190.000 TOTAL HOURS OF ELEVATED RELEASES 2065.830 TOTAL HOURS OF STABILITY CLASS B 67.990 TOTAL HOURS OF ELEVATED STABILITY CLASS B 61.770 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND DIRECTION MEASURED AT 45.74 METER LEVEL WIND SPEED MEASURED AT 45.74 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2020/10/13 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS C (-1.7< DELTA T<=-1.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE JUL 1, 2020 - SEP 30, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.122 0.037 0.000 0.000 0.159 NNE 0.000 0.000 0.000 0.000 0.000 0.120 0.037 0.000 0.000 0.157 NE 0.000 0.000 0.000 0.000 0.000 0.079 0.000 0.000 0.000 0.079 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.040 0.038 0.000 0.000 0.078 SE 0.000 0.000 0.000 0.183 0.347 0.286 0.074 0.000 0.000 0.890 SSE 0.000 0.000 0.000 0.365 0.483 0.042 0.037 0.000 0.000 0.927 S 0.000 0.000 0.046 0.320 0.045 0.083 0.000 0.000 0.000 0.493 SSW 0.000 0.000 0.046 0.137 0.175 0.077 0.000 0.000 0.000 0.435 SW 0.000 0.000 0.000 0.137 0.042 0.042 0.000 0.000 0.000 0.221 WSW 0.000 0.000 0.000 0.091 0.043 0.081 0.000 0.000 0.000 0.216 W 0.000 0.000 0.000 0.183 0.268 0.410 0.000 0.000 0.000 0.861 WNW 0.000 0.000 0.000 0.000 0.045 0.323 0.000 0.000 0.000 0.368 NW 0.000 0.000 0.000 0.000 0.043 0.000 0.037 0.028 0.000 0.109 NNW 0.000 0.000 0.000 0.000 0.085 0.237 0.075 0.000 0.000 0.396 SUBTOTAL 0.000 0.000 0.091 1.416 1.576 1.942 0.335 0.028 0.000 5.388 TOTAL HOURS OF VALID OBSERVATIONS 2190.000 TOTAL HOURS OF ELEVATED RELEASES 2065.830 TOTAL HOURS OF STABILITY CLASS C 125.690 TOTAL HOURS OF ELEVATED STABILITY CLASS C 118.000 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND DIRECTION MEASURED AT 45.74 METER LEVEL WIND SPEED MEASURED AT 45.74 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2020/10/13 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS D (-1.5< DELTA T<=-0.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE JUL 1, 2020 - SEP 30, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.274 0.183 0.354 0.446 0.335 0.030 0.000 1.622 NNE 0.000 0.000 0.137 0.320 0.304 0.519 0.301 0.000 0.000 1.581 NE 0.000 0.000 0.137 0.274 0.346 0.368 0.036 0.000 0.000 1.161 ENE 0.000 0.000 0.091 0.137 0.263 0.207 0.000 0.000 0.000 0.699 E 0.000 0.046 0.183 0.320 0.224 0.248 0.000 0.000 0.000 1.020 ESE 0.000 0.000 0.228 0.457 0.488 0.809 0.038 0.000 0.000 2.020 SE 0.000 0.046 0.868 1.233 0.440 0.648 0.189 0.000 0.000 3.423 SSE 0.000 0.000 1.187 1.279 0.661 0.447 0.221 0.000 0.000 3.795 S 0.000 0.000 1.279 1.142 1.140 0.805 0.557 0.215 0.000 5.138 SSW 0.000 0.000 1.142 1.050 0.402 1.038 0.185 0.000 0.000 3.817 SW 0.000 0.000 1.142 1.233 0.437 0.375 0.000 0.000 0.000 3.186 WSW 0.000 0.000 0.731 2.100 0.489 0.518 0.000 0.000 0.000 3.837 W 0.000 0.000 0.183 1.689 0.922 0.608 0.075 0.000 0.000 3.478 WNW 0.000 0.000 0.183 0.274 0.351 0.915 0.150 0.000 0.000 1.872 NW 0.000 0.000 0.091 0.320 0.221 0.317 0.261 0.018 0.000 1.228 NNW 0.000 0.000 0.137 0.320 0.394 0.557 0.113 0.000 0.000 1.521 SUBTOTAL 0.000 0.091 7.991 12.329 7.436 8.828 2.461 0.263 0.000 39.399 TOTAL HOURS OF VALID OBSERVATIONS 2190.000 TOTAL HOURS OF ELEVATED RELEASES 2065.830 TOTAL HOURS OF STABILITY CLASS D 893.680 TOTAL HOURS OF ELEVATED STABILITY CLASS D 862.830 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND DIRECTION MEASURED AT 45.74 METER LEVEL WIND SPEED MEASURED AT 45.74 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2020/10/13 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS E (-0.5< DELTA T<= 1.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE JUL 1, 2020 - SEP 30, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.183 0.411 0.836 1.486 0.188 0.000 0.000 3.104 NNE 0.000 0.000 0.228 0.502 0.480 1.575 0.416 0.000 0.000 3.202 NE 0.000 0.000 0.274 0.320 0.442 1.010 0.037 0.035 0.000 2.117 ENE 0.000 0.000 0.274 0.365 0.433 0.279 0.000 0.000 0.000 1.352 E 0.000 0.000 0.183 0.457 0.832 1.301 0.038 0.000 0.000 2.811 ESE 0.000 0.000 0.274 0.776 1.193 2.120 0.037 0.000 0.000 4.400 SE 0.000 0.000 0.274 0.685 0.394 0.777 0.113 0.000 0.000 2.243 SSE 0.000 0.046 0.365 0.959 0.837 0.162 0.074 0.000 0.000 2.443 S 0.000 0.000 0.137 1.050 0.568 0.682 0.150 0.000 0.000 2.587 SSW 0.000 0.000 0.411 0.731 0.267 0.203 0.113 0.000 0.000 1.725 SW 0.000 0.000 0.320 0.502 0.087 0.164 0.000 0.000 0.000 1.074 WSW 0.000 0.000 0.365 0.411 0.218 0.205 0.037 0.000 0.000 1.237 W 0.000 0.046 0.046 0.639 0.356 0.083 0.000 0.000 0.000 1.169 WNW 0.000 0.000 0.183 0.228 0.000 0.245 0.000 0.000 0.000 0.656 NW 0.000 0.000 0.274 0.228 0.222 0.083 0.000 0.000 0.000 0.807 NNW 0.000 0.000 0.137 0.183 0.399 0.564 0.037 0.036 0.000 1.356 SUBTOTAL 0.000 0.091 3.927 8.447 7.564 10.940 1.242 0.071 0.000 32.283 TOTAL HOURS OF VALID OBSERVATIONS 2190.000 TOTAL HOURS OF ELEVATED RELEASES 2065.830 TOTAL HOURS OF STABILITY CLASS E 751.000 TOTAL HOURS OF ELEVATED STABILITY CLASS E 706.990 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND DIRECTION MEASURED AT 45.74 METER LEVEL WIND SPEED MEASURED AT 45.74 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2020/10/13 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS F ( 1.5< DELTA T<= 4.0 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE JUL 1, 2020 - SEP 30, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.091 0.137 0.443 0.408 0.038 0.000 0.000 1.118 NNE 0.000 0.000 0.137 0.228 0.438 0.448 0.038 0.000 0.000 1.289 NE 0.000 0.000 0.228 0.365 0.442 0.405 0.000 0.000 0.000 1.441 ENE 0.000 0.046 0.137 0.502 0.349 0.320 0.000 0.000 0.000 1.354 E 0.000 0.046 0.228 0.228 0.221 0.206 0.000 0.000 0.000 0.930 ESE 0.000 0.046 0.091 0.137 0.179 0.777 0.000 0.000 0.000 1.229 SE 0.000 0.000 0.274 0.183 0.316 0.162 0.000 0.000 0.000 0.934 SSE 0.000 0.000 0.183 0.183 0.089 0.000 0.000 0.000 0.000 0.455 S 0.000 0.000 0.137 0.228 0.044 0.042 0.000 0.000 0.000 0.452 SSW 0.000 0.000 0.183 0.137 0.000 0.080 0.000 0.000 0.000 0.400 SW 0.000 0.000 0.091 0.000 0.000 0.000 0.000 0.000 0.000 0.091 WSW 0.000 0.000 0.091 0.046 0.045 0.000 0.000 0.000 0.000 0.182 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.000 0.091 0.000 0.041 0.000 0.000 0.000 0.132 NW 0.000 0.000 0.046 0.137 0.000 0.000 0.000 0.000 0.000 0.183 NNW 0.000 0.000 0.046 0.091 0.352 0.161 0.038 0.000 0.000 0.688 SUBTOTAL 0.000 0.137 1.963 2.694 2.920 3.050 0.114 0.000 0.000 10.878 TOTAL HOURS OF VALID OBSERVATIONS 2190.000 TOTAL HOURS OF ELEVATED RELEASES 2065.830 TOTAL HOURS OF STABILITY CLASS F 249.450 TOTAL HOURS OF ELEVATED STABILITY CLASS F 238.220 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND DIRECTION MEASURED AT 45.74 METER LEVEL WIND SPEED MEASURED AT 45.74 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2020/10/13 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS G (DELTA T > 4.0 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE JUL 1, 2020 - SEP 30, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.046 0.000 0.200 0.000 0.000 0.000 0.246 NNE 0.000 0.000 0.000 0.137 0.044 0.317 0.000 0.000 0.000 0.498 NE 0.000 0.000 0.000 0.091 0.175 0.159 0.000 0.000 0.000 0.426 ENE 0.000 0.000 0.046 0.000 0.087 0.042 0.000 0.000 0.000 0.175 E 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.046 ESE 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.046 SE 0.000 0.000 0.000 0.046 0.136 0.000 0.000 0.000 0.000 0.182 SSE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 S 0.000 0.000 0.046 0.046 0.000 0.000 0.000 0.000 0.000 0.091 SSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SW 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.046 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNW 0.000 0.000 0.000 0.000 0.043 0.040 0.000 0.000 0.000 0.083 SUBTOTAL 0.000 0.000 0.137 0.457 0.485 0.758 0.000 0.000 0.000 1.837 TOTAL HOURS OF VALID OBSERVATIONS 2190.000 TOTAL HOURS OF ELEVATED RELEASES 2065.830 TOTAL HOURS OF STABILITY CLASS G 44.970 TOTAL HOURS OF ELEVATED STABILITY CLASS G 40.230 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND DIRECTION MEASURED AT 45.74 METER LEVEL WIND SPEED MEASURED AT 45.74 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2020/10/13 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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Table7D4thQuarterJFDSplitLevelReleases JointFrequencyDistributionInPercent (GroundLevelReleaseModeAndElevatedReleaseMode)

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SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS A (DELTA T<=-1.9 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE OCT 1, 2020 - DEC 31, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNE 0.000 0.000 0.000 0.000 0.007 0.007 0.000 0.000 0.000 0.014 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.014 0.000 0.000 0.000 0.000 0.000 0.014 SE 0.000 0.000 0.034 0.043 0.000 0.000 0.000 0.000 0.000 0.077 SSE 0.000 0.000 0.035 0.078 0.000 0.000 0.000 0.000 0.000 0.113 S 0.000 0.000 0.000 0.001 0.000 0.000 0.000 0.000 0.000 0.001 SSW 0.000 0.000 0.000 0.002 0.000 0.000 0.000 0.000 0.000 0.002 SW 0.000 0.000 0.000 0.004 0.000 0.000 0.000 0.000 0.000 0.004 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.000 0.000 0.009 0.000 0.000 0.000 0.009 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.020 0.000 0.000 0.020 NNW 0.000 0.000 0.000 0.000 0.000 0.015 0.009 0.000 0.000 0.024 SUBTOTAL 0.000 0.000 0.070 0.142 0.007 0.030 0.029 0.000 0.000 0.278 TOTAL HOURS OF VALID OBSERVATIONS 2200.000 TOTAL HOURS OF GROUND LEVEL RELEASE 215.160 TOTAL HOURS OF STABILITY CLASS A 14.820 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS A 6.120 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTION MEASURED AT 10.50 METER LEVEL WIND SPEED MEASURED AT 10.50 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2021/01/07 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS B (-1.9< DELTA T<=-1.7 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE OCT 1, 2020 - DEC 31, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.017 0.028 0.000 0.000 0.000 0.045 NNE 0.000 0.000 0.000 0.000 0.000 0.020 0.000 0.000 0.000 0.020 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.037 0.009 0.000 0.000 0.000 0.000 0.046 SE 0.000 0.000 0.010 0.017 0.000 0.000 0.000 0.000 0.000 0.027 SSE 0.000 0.000 0.000 0.009 0.000 0.000 0.000 0.000 0.000 0.009 S 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SW 0.000 0.000 0.000 0.003 0.000 0.000 0.000 0.000 0.000 0.003 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.000 0.000 0.009 0.009 0.000 0.000 0.018 WNW 0.000 0.000 0.000 0.000 0.000 0.017 0.000 0.000 0.000 0.017 NW 0.000 0.000 0.000 0.000 0.000 0.005 0.000 0.000 0.000 0.005 NNW 0.000 0.000 0.000 0.000 0.019 0.042 0.080 0.000 0.000 0.141 SUBTOTAL 0.000 0.000 0.010 0.065 0.045 0.120 0.090 0.000 0.000 0.330 TOTAL HOURS OF VALID OBSERVATIONS 2200.000 TOTAL HOURS OF GROUND LEVEL RELEASE 215.160 TOTAL HOURS OF STABILITY CLASS B 21.230 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS B 7.260 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTION MEASURED AT 10.50 METER LEVEL WIND SPEED MEASURED AT 10.50 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2021/01/07 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS C (-1.7< DELTA T<=-1.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE OCT 1, 2020 - DEC 31, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.001 0.024 0.013 0.000 0.000 0.000 0.038 NNE 0.000 0.000 0.000 0.000 0.005 0.019 0.000 0.000 0.000 0.024 NE 0.000 0.000 0.000 0.000 0.003 0.000 0.000 0.000 0.000 0.003 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.018 0.009 0.000 0.000 0.000 0.000 0.026 SE 0.000 0.000 0.001 0.004 0.000 0.000 0.000 0.000 0.000 0.005 SSE 0.000 0.000 0.022 0.003 0.000 0.000 0.000 0.000 0.000 0.025 S 0.000 0.000 0.004 0.009 0.000 0.000 0.000 0.000 0.000 0.013 SSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WSW 0.000 0.000 0.000 0.008 0.007 0.000 0.000 0.000 0.000 0.015 W 0.000 0.000 0.000 0.000 0.000 0.008 0.010 0.000 0.000 0.017 WNW 0.000 0.000 0.000 0.000 0.004 0.041 0.008 0.000 0.000 0.053 NW 0.000 0.000 0.000 0.000 0.005 0.043 0.037 0.000 0.000 0.085 NNW 0.000 0.000 0.000 0.000 0.006 0.015 0.009 0.000 0.000 0.030 SUBTOTAL 0.000 0.000 0.027 0.042 0.064 0.139 0.064 0.000 0.000 0.335 TOTAL HOURS OF VALID OBSERVATIONS 2200.000 TOTAL HOURS OF GROUND LEVEL RELEASE 215.160 TOTAL HOURS OF STABILITY CLASS C 52.010 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS C 7.380 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTION MEASURED AT 10.50 METER LEVEL WIND SPEED MEASURED AT 10.50 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2021/01/07 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS D (-1.5< DELTA T<=-0.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE OCT 1, 2020 - DEC 31, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.082 0.132 0.081 0.000 0.000 0.000 0.296 NNE 0.000 0.000 0.001 0.068 0.110 0.030 0.070 0.000 0.000 0.280 NE 0.000 0.000 0.000 0.008 0.028 0.032 0.000 0.000 0.000 0.068 ENE 0.000 0.000 0.000 0.004 0.021 0.018 0.000 0.000 0.000 0.043 E 0.000 0.000 0.001 0.020 0.036 0.043 0.000 0.000 0.000 0.100 ESE 0.000 0.000 0.031 0.172 0.032 0.045 0.000 0.000 0.000 0.281 SE 0.000 0.000 0.056 0.050 0.000 0.000 0.000 0.000 0.000 0.106 SSE 0.000 0.000 0.041 0.040 0.000 0.000 0.000 0.000 0.000 0.081 S 0.000 0.000 0.017 0.000 0.000 0.000 0.000 0.000 0.000 0.017 SSW 0.000 0.000 0.008 0.007 0.000 0.000 0.000 0.000 0.000 0.015 SW 0.000 0.000 0.002 0.002 0.000 0.000 0.000 0.000 0.000 0.004 WSW 0.000 0.000 0.004 0.041 0.014 0.016 0.000 0.000 0.000 0.075 W 0.000 0.000 0.002 0.043 0.080 0.141 0.009 0.000 0.000 0.275 WNW 0.000 0.000 0.001 0.007 0.034 0.092 0.345 0.036 0.000 0.515 NW 0.000 0.000 0.000 0.011 0.027 0.209 0.474 0.000 0.000 0.721 NNW 0.000 0.000 0.000 0.024 0.046 0.251 0.048 0.000 0.000 0.370 SUBTOTAL 0.000 0.000 0.165 0.580 0.561 0.959 0.946 0.036 0.000 3.247 TOTAL HOURS OF VALID OBSERVATIONS 2200.000 TOTAL HOURS OF GROUND LEVEL RELEASE 215.160 TOTAL HOURS OF STABILITY CLASS D 849.430 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS D 71.430 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTION MEASURED AT 10.50 METER LEVEL WIND SPEED MEASURED AT 10.50 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2021/01/07 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS E (-0.5< DELTA T<= 1.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE OCT 1, 2020 - DEC 31, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.039 0.061 0.074 0.009 0.000 0.000 0.000 0.182 NNE 0.000 0.000 0.028 0.061 0.022 0.015 0.000 0.000 0.000 0.126 NE 0.000 0.000 0.000 0.035 0.033 0.017 0.000 0.000 0.000 0.085 ENE 0.000 0.000 0.020 0.037 0.030 0.032 0.000 0.000 0.000 0.120 E 0.000 0.000 0.119 0.157 0.048 0.016 0.000 0.000 0.000 0.340 ESE 0.000 0.001 0.210 0.370 0.062 0.000 0.000 0.000 0.000 0.643 SE 0.000 0.017 0.150 0.070 0.000 0.000 0.000 0.000 0.000 0.237 SSE 0.000 0.003 0.144 0.413 0.226 0.045 0.000 0.000 0.000 0.832 S 0.000 0.000 0.029 0.098 0.118 0.000 0.000 0.000 0.000 0.245 SSW 0.000 0.000 0.003 0.000 0.000 0.000 0.000 0.000 0.000 0.003 SW 0.000 0.000 0.005 0.011 0.000 0.000 0.000 0.000 0.000 0.016 WSW 0.000 0.003 0.011 0.004 0.000 0.008 0.000 0.000 0.000 0.025 W 0.000 0.001 0.022 0.078 0.029 0.016 0.000 0.000 0.000 0.145 WNW 0.000 0.000 0.007 0.012 0.028 0.024 0.009 0.000 0.000 0.081 NW 0.000 0.000 0.000 0.009 0.012 0.049 0.000 0.000 0.000 0.070 NNW 0.000 0.000 0.010 0.056 0.072 0.065 0.000 0.000 0.000 0.203 SUBTOTAL 0.000 0.025 0.796 1.471 0.753 0.297 0.009 0.000 0.000 3.352 TOTAL HOURS OF VALID OBSERVATIONS 2200.000 TOTAL HOURS OF GROUND LEVEL RELEASE 215.160 TOTAL HOURS OF STABILITY CLASS E 728.640 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS E 73.750 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTION MEASURED AT 10.50 METER LEVEL WIND SPEED MEASURED AT 10.50 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2021/01/07 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS F ( 1.5< DELTA T<= 4.0 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE OCT 1, 2020 - DEC 31, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.001 0.125 0.025 0.000 0.000 0.000 0.000 0.000 0.152 NNE 0.000 0.000 0.031 0.032 0.008 0.000 0.000 0.000 0.000 0.071 NE 0.000 0.000 0.007 0.006 0.000 0.000 0.000 0.000 0.000 0.014 ENE 0.000 0.011 0.040 0.018 0.008 0.000 0.000 0.000 0.000 0.078 E 0.000 0.005 0.152 0.069 0.000 0.000 0.000 0.000 0.000 0.225 ESE 0.000 0.012 0.088 0.043 0.000 0.000 0.000 0.000 0.000 0.143 SE 0.000 0.011 0.145 0.007 0.000 0.000 0.000 0.000 0.000 0.163 SSE 0.000 0.005 0.141 0.147 0.192 0.000 0.000 0.000 0.000 0.485 S 0.000 0.002 0.006 0.000 0.049 0.000 0.000 0.000 0.000 0.056 SSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SW 0.000 0.000 0.002 0.008 0.000 0.000 0.000 0.000 0.000 0.010 WSW 0.000 0.000 0.002 0.000 0.000 0.000 0.000 0.000 0.000 0.002 W 0.000 0.000 0.003 0.000 0.000 0.000 0.000 0.000 0.000 0.003 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.001 0.000 0.006 0.000 0.000 0.000 0.000 0.007 NNW 0.000 0.000 0.033 0.015 0.008 0.000 0.000 0.000 0.000 0.055 SUBTOTAL 0.000 0.048 0.777 0.370 0.270 0.000 0.000 0.000 0.000 1.465 TOTAL HOURS OF VALID OBSERVATIONS 2200.000 TOTAL HOURS OF GROUND LEVEL RELEASE 215.160 TOTAL HOURS OF STABILITY CLASS F 345.190 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS F 32.240 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTION MEASURED AT 10.50 METER LEVEL WIND SPEED MEASURED AT 10.50 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2021/01/07 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS G (DELTA T > 4.0 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE OCT 1, 2020 - DEC 31, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.001 0.005 0.124 0.062 0.000 0.000 0.000 0.000 0.000 0.192 NNE 0.000 0.005 0.051 0.043 0.000 0.000 0.000 0.000 0.000 0.100 NE 0.000 0.004 0.023 0.007 0.000 0.000 0.000 0.000 0.000 0.035 ENE 0.000 0.010 0.032 0.012 0.008 0.000 0.000 0.000 0.000 0.062 E 0.000 0.003 0.044 0.000 0.000 0.000 0.000 0.000 0.000 0.048 ESE 0.001 0.011 0.052 0.000 0.000 0.000 0.000 0.000 0.000 0.064 SE 0.001 0.019 0.044 0.000 0.000 0.000 0.000 0.000 0.000 0.064 SSE 0.001 0.000 0.086 0.098 0.000 0.000 0.000 0.000 0.000 0.184 S 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNW 0.000 0.001 0.009 0.014 0.000 0.000 0.000 0.000 0.000 0.024 SUBTOTAL 0.005 0.059 0.465 0.235 0.008 0.000 0.000 0.000 0.000 0.772 TOTAL HOURS OF VALID OBSERVATIONS 2200.000 TOTAL HOURS OF GROUND LEVEL RELEASE 215.160 TOTAL HOURS OF STABILITY CLASS G 188.680 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS G 16.980 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTION MEASURED AT 10.50 METER LEVEL WIND SPEED MEASURED AT 10.50 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2021/01/07 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS A (DELTA T<=-1.9 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE OCT 1, 2020 - DEC 31, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.000 0.000 0.000 0.000 0.116 0.000 0.000 0.000 0.116 SSE 0.000 0.000 0.000 0.000 0.044 0.080 0.112 0.000 0.000 0.236 S 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SW 0.000 0.000 0.000 0.000 0.043 0.000 0.000 0.000 0.000 0.043 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SUBTOTAL 0.000 0.000 0.000 0.000 0.087 0.197 0.112 0.000 0.000 0.395 TOTAL HOURS OF VALID OBSERVATIONS 2200.000 TOTAL HOURS OF ELEVATED RELEASES 1984.840 TOTAL HOURS OF STABILITY CLASS A 14.820 TOTAL HOURS OF ELEVATED STABILITY CLASS A 8.700 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND DIRECTION MEASURED AT 45.74 METER LEVEL WIND SPEED MEASURED AT 45.74 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2021/01/07 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS B (-1.9< DELTA T<=-1.7 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE OCT 1, 2020 - DEC 31, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.000 0.000 0.000 0.044 0.040 0.037 0.000 0.000 0.121 SSE 0.000 0.000 0.000 0.000 0.180 0.041 0.075 0.000 0.000 0.296 S 0.000 0.000 0.000 0.091 0.044 0.000 0.038 0.000 0.000 0.173 SSW 0.000 0.000 0.000 0.000 0.045 0.000 0.000 0.000 0.000 0.045 SW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SUBTOTAL 0.000 0.000 0.000 0.091 0.314 0.081 0.150 0.000 0.000 0.635 TOTAL HOURS OF VALID OBSERVATIONS 2200.000 TOTAL HOURS OF ELEVATED RELEASES 1984.840 TOTAL HOURS OF STABILITY CLASS B 21.230 TOTAL HOURS OF ELEVATED STABILITY CLASS B 13.970 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND DIRECTION MEASURED AT 45.74 METER LEVEL WIND SPEED MEASURED AT 45.74 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2021/01/07 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS C (-1.7< DELTA T<=-1.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE OCT 1, 2020 - DEC 31, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.275 0.000 0.000 0.000 0.275 NNE 0.000 0.000 0.000 0.000 0.000 0.156 0.000 0.000 0.000 0.156 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.121 0.000 0.000 0.000 0.121 SE 0.000 0.000 0.045 0.091 0.129 0.245 0.074 0.000 0.000 0.585 SSE 0.000 0.000 0.000 0.091 0.000 0.040 0.073 0.000 0.000 0.204 S 0.000 0.000 0.000 0.091 0.000 0.039 0.074 0.000 0.000 0.204 SSW 0.000 0.000 0.000 0.091 0.000 0.000 0.000 0.000 0.000 0.091 SW 0.000 0.000 0.000 0.000 0.087 0.041 0.000 0.000 0.000 0.129 WSW 0.000 0.000 0.000 0.000 0.042 0.000 0.000 0.000 0.000 0.042 W 0.000 0.000 0.000 0.000 0.000 0.000 0.110 0.000 0.000 0.110 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNW 0.000 0.000 0.000 0.000 0.000 0.039 0.074 0.000 0.000 0.113 SUBTOTAL 0.000 0.000 0.045 0.364 0.259 0.956 0.405 0.000 0.000 2.029 TOTAL HOURS OF VALID OBSERVATIONS 2200.000 TOTAL HOURS OF ELEVATED RELEASES 1984.840 TOTAL HOURS OF STABILITY CLASS C 52.010 TOTAL HOURS OF ELEVATED STABILITY CLASS C 44.630 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND DIRECTION MEASURED AT 45.74 METER LEVEL WIND SPEED MEASURED AT 45.74 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2021/01/07 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS D (-1.5< DELTA T<=-0.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE OCT 1, 2020 - DEC 31, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.091 0.364 0.303 2.508 0.481 0.000 0.000 3.747 NNE 0.000 0.000 0.091 0.227 0.736 1.527 0.148 0.067 0.000 2.795 NE 0.000 0.045 0.000 0.273 0.264 0.321 0.036 0.000 0.000 0.939 ENE 0.000 0.000 0.227 0.091 0.312 0.084 0.000 0.000 0.000 0.715 E 0.000 0.000 0.045 0.318 0.089 0.122 0.146 0.000 0.000 0.720 ESE 0.000 0.000 0.136 0.636 0.520 0.845 0.000 0.000 0.000 2.137 SE 0.000 0.000 0.727 1.136 0.529 0.918 0.445 0.115 0.000 3.872 SSE 0.000 0.000 0.455 0.682 0.305 0.398 0.408 0.077 0.000 2.325 S 0.000 0.000 0.409 0.364 0.130 0.200 0.110 0.040 0.008 1.260 SSW 0.000 0.000 0.227 0.182 0.220 0.080 0.000 0.000 0.000 0.709 SW 0.000 0.045 0.500 0.409 0.130 0.040 0.000 0.000 0.000 1.125 WSW 0.000 0.000 0.182 0.773 0.173 0.525 0.297 0.042 0.000 1.991 W 0.000 0.000 0.136 0.591 0.792 1.161 0.405 0.000 0.000 3.086 WNW 0.000 0.000 0.227 0.409 0.437 0.722 1.104 0.292 0.010 3.201 NW 0.000 0.045 0.182 0.500 0.665 0.746 1.035 0.671 0.000 3.845 NNW 0.000 0.000 0.091 0.273 0.260 0.905 1.186 0.180 0.000 2.895 SUBTOTAL 0.000 0.136 3.727 7.227 5.866 11.101 5.804 1.485 0.017 35.364 TOTAL HOURS OF VALID OBSERVATIONS 2200.000 TOTAL HOURS OF ELEVATED RELEASES 1984.840 TOTAL HOURS OF STABILITY CLASS D 849.430 TOTAL HOURS OF ELEVATED STABILITY CLASS D 778.000 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND DIRECTION MEASURED AT 45.74 METER LEVEL WIND SPEED MEASURED AT 45.74 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2021/01/07 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS E (-0.5< DELTA T<= 1.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE OCT 1, 2020 - DEC 31, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.045 0.136 0.182 0.437 1.164 0.187 0.000 0.000 2.152 NNE 0.000 0.000 0.091 0.136 0.609 0.568 0.038 0.000 0.000 1.442 NE 0.000 0.000 0.091 0.318 0.437 0.399 0.037 0.000 0.000 1.283 ENE 0.000 0.000 0.136 0.227 0.220 0.197 0.000 0.000 0.000 0.781 E 0.000 0.000 0.136 0.318 0.705 0.361 0.260 0.000 0.000 1.780 ESE 0.000 0.000 0.091 0.455 0.827 3.004 0.075 0.000 0.000 4.452 SE 0.000 0.000 0.273 0.500 0.394 2.903 1.261 0.125 0.000 5.456 SSE 0.000 0.000 0.136 0.545 0.530 0.792 1.105 0.539 0.034 3.681 S 0.000 0.000 0.091 0.318 0.261 0.243 0.476 0.324 0.000 1.714 SSW 0.000 0.000 0.045 0.318 0.309 0.438 0.111 0.030 0.000 1.251 SW 0.000 0.045 0.091 0.182 0.305 0.040 0.000 0.000 0.000 0.664 WSW 0.000 0.000 0.136 0.318 0.310 0.040 0.000 0.000 0.000 0.805 W 0.000 0.000 0.091 0.273 0.435 0.325 0.038 0.000 0.000 1.162 WNW 0.000 0.000 0.045 0.273 0.134 0.527 0.038 0.000 0.000 1.017 NW 0.000 0.000 0.045 0.091 0.401 0.357 0.148 0.000 0.000 1.042 NNW 0.000 0.045 0.000 0.091 0.130 0.595 0.224 0.000 0.000 1.085 SUBTOTAL 0.000 0.136 1.636 4.545 6.445 11.955 3.999 1.018 0.034 29.768 TOTAL HOURS OF VALID OBSERVATIONS 2200.000 TOTAL HOURS OF ELEVATED RELEASES 1984.840 TOTAL HOURS OF STABILITY CLASS E 728.640 TOTAL HOURS OF ELEVATED STABILITY CLASS E 654.890 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND DIRECTION MEASURED AT 45.74 METER LEVEL WIND SPEED MEASURED AT 45.74 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2021/01/07 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS F ( 1.5< DELTA T<= 4.0 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE OCT 1, 2020 - DEC 31, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.136 0.132 0.793 0.150 0.000 0.000 1.211 NNE 0.000 0.000 0.045 0.136 0.133 0.278 0.038 0.000 0.000 0.630 NE 0.000 0.000 0.091 0.136 0.177 0.161 0.000 0.000 0.000 0.565 ENE 0.000 0.000 0.091 0.136 0.263 0.233 0.038 0.000 0.000 0.761 E 0.000 0.000 0.091 0.182 0.394 0.411 0.000 0.000 0.000 1.078 ESE 0.000 0.000 0.045 0.273 0.699 0.855 0.000 0.000 0.000 1.872 SE 0.000 0.091 0.136 0.682 0.430 0.762 0.075 0.000 0.000 2.177 SSE 0.000 0.000 0.045 0.455 0.215 0.691 0.556 0.069 0.000 2.032 S 0.000 0.000 0.045 0.182 0.043 0.357 0.184 0.060 0.000 0.870 SSW 0.000 0.091 0.045 0.045 0.088 0.080 0.000 0.000 0.000 0.350 SW 0.000 0.000 0.136 0.045 0.043 0.000 0.000 0.000 0.000 0.225 WSW 0.000 0.000 0.227 0.227 0.088 0.000 0.000 0.000 0.000 0.543 W 0.000 0.000 0.182 0.227 0.177 0.040 0.000 0.000 0.000 0.626 WNW 0.000 0.000 0.091 0.227 0.000 0.000 0.000 0.000 0.000 0.318 NW 0.000 0.000 0.136 0.000 0.043 0.241 0.000 0.000 0.000 0.421 NNW 0.000 0.000 0.045 0.091 0.128 0.281 0.000 0.000 0.000 0.546 SUBTOTAL 0.000 0.182 1.455 3.182 3.054 5.184 1.041 0.129 0.000 14.225 TOTAL HOURS OF VALID OBSERVATIONS 2200.000 TOTAL HOURS OF ELEVATED RELEASES 1984.840 TOTAL HOURS OF STABILITY CLASS F 345.190 TOTAL HOURS OF ELEVATED STABILITY CLASS F 312.950 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND DIRECTION MEASURED AT 45.74 METER LEVEL WIND SPEED MEASURED AT 45.74 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2021/01/07 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS G (DELTA T > 4.0 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE OCT 1, 2020 - DEC 31, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.045 0.091 0.091 0.000 0.278 0.000 0.000 0.000 0.505 NNE 0.000 0.000 0.136 0.227 0.042 0.240 0.000 0.000 0.000 0.645 NE 0.000 0.000 0.045 0.364 0.000 0.242 0.000 0.000 0.000 0.651 ENE 0.000 0.000 0.045 0.091 0.263 0.358 0.038 0.000 0.000 0.795 E 0.000 0.000 0.000 0.000 0.305 0.206 0.000 0.000 0.000 0.511 ESE 0.000 0.000 0.091 0.182 0.308 0.042 0.000 0.000 0.000 0.622 SE 0.000 0.000 0.045 0.455 0.177 0.123 0.000 0.000 0.000 0.800 SSE 0.000 0.000 0.273 0.409 0.305 0.165 0.038 0.000 0.000 1.190 S 0.000 0.000 0.045 0.045 0.042 0.078 0.000 0.000 0.000 0.211 SSW 0.000 0.000 0.136 0.227 0.045 0.000 0.000 0.000 0.000 0.409 SW 0.000 0.000 0.318 0.091 0.000 0.000 0.000 0.000 0.000 0.409 WSW 0.000 0.045 0.136 0.000 0.000 0.000 0.000 0.000 0.000 0.182 W 0.000 0.045 0.091 0.045 0.000 0.000 0.000 0.000 0.000 0.182 WNW 0.000 0.000 0.136 0.045 0.000 0.000 0.000 0.000 0.000 0.182 NW 0.000 0.091 0.091 0.045 0.000 0.000 0.000 0.000 0.000 0.227 NNW 0.000 0.000 0.045 0.000 0.000 0.238 0.000 0.000 0.000 0.283 SUBTOTAL 0.000 0.227 1.727 2.318 1.487 1.969 0.075 0.000 0.000 7.805 TOTAL HOURS OF VALID OBSERVATIONS 2200.000 TOTAL HOURS OF ELEVATED RELEASES 1984.840 TOTAL HOURS OF STABILITY CLASS G 188.680 TOTAL HOURS OF ELEVATED STABILITY CLASS G 171.700 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND DIRECTION MEASURED AT 45.74 METER LEVEL WIND SPEED MEASURED AT 45.74 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2021/01/07 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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Table8A1stQuarterJFDElevatedReleases JointFrequencyDistributionInPercent

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS A (DELTA T<=-1.9 C/100 M)

BROWNS FERRY NUCLEAR PLANT JAN 1, 2020 - MAR 31, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.046 0.046 0.000 0.000 0.092 SE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSE 0.000 0.000 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.046 S 0.000 0.000 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.046 SSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SUBTOTAL 0.000 0.000 0.000 0.000 0.000 0.138 0.046 0.000 0.000 0.184 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2174 TOTAL HOURS OF STABILITY CLASS A 4 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS A 4 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2174 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT 90.29 METER LEVEL DATE PRINTED: 2020/05/05 MEAN WIND SPEED = 11.98 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS B (-1.9< DELTA T<=-1.7 C/100 M)

BROWNS FERRY NUCLEAR PLANT JAN 1, 2020 - MAR 31, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.046 0.046 0.000 0.000 0.092 NNE 0.000 0.000 0.000 0.000 0.000 0.046 0.000 0.046 0.000 0.092 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.138 0.000 0.000 0.000 0.138 SE 0.000 0.000 0.000 0.000 0.000 0.092 0.000 0.000 0.000 0.092 SSE 0.000 0.000 0.000 0.000 0.000 0.000 0.092 0.000 0.000 0.092 S 0.000 0.000 0.000 0.000 0.000 0.092 0.000 0.000 0.000 0.092 SSW 0.000 0.000 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.046 SW 0.000 0.000 0.000 0.000 0.000 0.092 0.000 0.000 0.000 0.092 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.046 0.000 0.046 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.046 0.000 0.046 NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SUBTOTAL 0.000 0.000 0.000 0.000 0.000 0.552 0.138 0.138 0.000 0.828 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2174 TOTAL HOURS OF STABILITY CLASS B 18 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS B 18 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2174 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT 90.29 METER LEVEL DATE PRINTED: 2020/05/05 MEAN WIND SPEED = 12.28 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS C (-1.7< DELTA T<=-1.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT JAN 1, 2020 - MAR 31, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.414 0.138 0.046 0.000 0.598 NNE 0.000 0.000 0.000 0.000 0.000 0.184 0.046 0.000 0.000 0.230 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.184 0.046 0.046 0.000 0.000 0.276 SE 0.000 0.000 0.000 0.000 0.046 0.046 0.000 0.000 0.000 0.092 SSE 0.000 0.000 0.000 0.046 0.046 0.000 0.046 0.000 0.000 0.138 S 0.000 0.000 0.000 0.046 0.000 0.046 0.000 0.046 0.000 0.138 SSW 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.046 SW 0.000 0.000 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.046 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.046 0.000 0.000 0.046 W 0.000 0.000 0.000 0.000 0.000 0.138 0.138 0.046 0.000 0.322 WNW 0.000 0.000 0.000 0.000 0.000 0.138 0.138 0.092 0.000 0.368 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.092 0.276 0.000 0.368 NNW 0.000 0.000 0.000 0.000 0.000 0.092 0.000 0.000 0.000 0.092 SUBTOTAL 0.000 0.000 0.000 0.138 0.276 1.150 0.690 0.506 0.000 2.760 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2174 TOTAL HOURS OF STABILITY CLASS C 60 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS C 60 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2174 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT 90.29 METER LEVEL DATE PRINTED: 2020/05/05 MEAN WIND SPEED = 12.81 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS D (-1.5< DELTA T<=-0.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT JAN 1, 2020 - MAR 31, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.092 0.276 0.138 1.334 2.484 0.598 0.000 4.922 NNE 0.000 0.000 0.092 0.184 0.138 1.196 2.208 0.184 0.000 4.002 NE 0.000 0.000 0.092 0.276 0.414 1.104 0.460 0.000 0.000 2.346 ENE 0.000 0.000 0.138 0.184 0.184 0.322 0.000 0.000 0.000 0.828 E 0.000 0.000 0.046 0.184 0.276 0.230 0.046 0.000 0.000 0.782 ESE 0.000 0.000 0.276 0.184 0.506 0.506 0.460 0.230 0.000 2.162 SE 0.000 0.000 0.184 0.184 0.276 0.460 0.828 0.368 0.138 2.438 SSE 0.000 0.000 0.230 0.230 0.230 0.322 0.414 0.368 0.138 1.932 S 0.000 0.000 0.138 0.184 0.184 0.414 0.138 0.092 0.000 1.150 SSW 0.000 0.000 0.092 0.184 0.138 0.230 0.138 0.092 0.000 0.874 SW 0.000 0.000 0.184 0.230 0.184 0.414 0.184 0.000 0.000 1.196 WSW 0.000 0.000 0.138 0.092 0.138 0.644 0.828 0.138 0.000 1.978 W 0.000 0.000 0.092 0.184 0.230 1.380 1.794 0.322 0.000 4.002 WNW 0.000 0.000 0.000 0.138 0.322 1.104 1.012 0.598 0.276 3.450 NW 0.000 0.000 0.184 0.000 0.092 0.828 1.150 1.472 0.092 3.818 NNW 0.000 0.000 0.046 0.000 0.046 0.552 0.920 0.230 0.000 1.794 SUBTOTAL 0.000 0.000 2.024 2.714 3.496 11.040 13.063 4.692 0.644 37.672 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2174 TOTAL HOURS OF STABILITY CLASS D 819 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS D 819 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2174 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT 90.29 METER LEVEL DATE PRINTED: 2020/05/05 MEAN WIND SPEED = 12.32 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS E (-0.5< DELTA T<= 1.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT JAN 1, 2020 - MAR 31, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.046 0.046 0.092 0.092 0.782 0.644 0.230 0.000 1.932 NNE 0.000 0.000 0.046 0.184 0.230 0.920 0.460 0.138 0.000 1.978 NE 0.000 0.000 0.046 0.092 0.138 0.828 0.598 0.000 0.000 1.702 ENE 0.000 0.046 0.046 0.092 0.092 0.828 0.230 0.046 0.000 1.380 E 0.000 0.000 0.092 0.138 0.184 0.230 0.092 0.000 0.000 0.736 ESE 0.000 0.000 0.184 0.046 0.230 0.736 0.368 0.230 0.000 1.794 SE 0.000 0.000 0.046 0.276 0.368 2.254 2.162 0.874 0.368 6.348 SSE 0.000 0.000 0.000 0.598 0.230 1.472 1.794 0.782 0.322 5.198 S 0.000 0.000 0.000 0.230 0.414 2.116 2.438 1.886 0.598 7.682 SSW 0.000 0.000 0.184 0.276 0.276 1.472 2.070 1.058 0.230 5.566 SW 0.000 0.000 0.092 0.138 0.506 1.104 0.690 0.046 0.000 2.576 WSW 0.000 0.000 0.092 0.138 0.276 1.380 0.598 0.046 0.046 2.576 W 0.000 0.046 0.000 0.184 0.184 1.334 0.552 0.184 0.046 2.530 WNW 0.000 0.000 0.046 0.092 0.276 0.460 0.552 0.184 0.000 1.610 NW 0.000 0.000 0.000 0.184 0.138 0.230 0.230 0.276 0.046 1.104 NNW 0.000 0.000 0.046 0.138 0.092 0.644 0.506 0.046 0.000 1.472 SUBTOTAL 0.000 0.138 0.966 2.898 3.726 16.789 13.983 6.026 1.656 46.182 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2174 TOTAL HOURS OF STABILITY CLASS E 1004 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS E 1004 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2174 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT 90.29 METER LEVEL DATE PRINTED: 2020/05/05 MEAN WIND SPEED = 12.85 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS F ( 1.5< DELTA T<= 4.0 C/100 M)

BROWNS FERRY NUCLEAR PLANT JAN 1, 2020 - MAR 31, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.092 0.138 0.000 0.000 0.000 0.230 NNE 0.000 0.000 0.000 0.046 0.046 0.046 0.138 0.000 0.000 0.276 NE 0.000 0.000 0.000 0.000 0.138 0.276 0.000 0.000 0.000 0.414 ENE 0.000 0.000 0.000 0.000 0.092 0.092 0.092 0.000 0.000 0.276 E 0.000 0.000 0.092 0.000 0.092 0.092 0.000 0.000 0.000 0.276 ESE 0.000 0.000 0.092 0.046 0.184 0.322 0.046 0.000 0.000 0.690 SE 0.000 0.000 0.000 0.138 0.046 0.184 0.828 0.828 0.368 2.392 SSE 0.000 0.000 0.000 0.000 0.046 0.322 1.334 0.368 0.138 2.208 S 0.000 0.000 0.000 0.000 0.046 0.506 1.104 0.598 0.046 2.300 SSW 0.000 0.000 0.000 0.000 0.046 0.736 0.276 0.092 0.000 1.150 SW 0.000 0.000 0.092 0.046 0.046 0.000 0.046 0.000 0.000 0.230 WSW 0.000 0.000 0.000 0.046 0.046 0.046 0.000 0.000 0.000 0.138 W 0.000 0.000 0.000 0.000 0.000 0.092 0.046 0.000 0.000 0.138 WNW 0.000 0.000 0.092 0.000 0.000 0.046 0.046 0.000 0.000 0.184 NW 0.000 0.000 0.046 0.138 0.000 0.092 0.046 0.000 0.000 0.322 NNW 0.000 0.000 0.000 0.000 0.000 0.138 0.092 0.000 0.000 0.230 SUBTOTAL 0.000 0.000 0.414 0.460 0.920 3.128 4.094 1.886 0.552 11.454 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2174 TOTAL HOURS OF STABILITY CLASS F 249 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS F 249 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2174 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT 90.29 METER LEVEL DATE PRINTED: 2020/05/05 MEAN WIND SPEED = 13.83 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS G (DELTA T > 4.0 C/100 M)

BROWNS FERRY NUCLEAR PLANT JAN 1, 2020 - MAR 31, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.046 NNE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NE 0.000 0.000 0.046 0.000 0.000 0.138 0.000 0.000 0.000 0.184 ENE 0.000 0.092 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.092 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.046 SE 0.000 0.000 0.000 0.000 0.000 0.138 0.000 0.000 0.000 0.138 SSE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.092 0.000 0.092 S 0.000 0.000 0.000 0.000 0.000 0.000 0.138 0.092 0.000 0.230 SSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WSW 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.046 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.046 0.000 0.000 0.046 SUBTOTAL 0.000 0.092 0.138 0.046 0.000 0.276 0.184 0.184 0.000 0.920 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2174 TOTAL HOURS OF STABILITY CLASS G 20 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS G 20 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2174 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT 90.29 METER LEVEL DATE PRINTED: 2020/05/05 MEAN WIND SPEED = 11.14 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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Table8B2ndQuarterJFDElevatedReleases JointFrequencyDistributionInPercent

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS A (DELTA T<=-1.9 C/100 M)

BROWNS FERRY NUCLEAR PLANT APR 1, 2020 - JUN 30, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.000 0.047 0.000 0.000 0.047 NNE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.000 0.000 0.000 0.000 0.047 0.047 0.000 0.000 0.094 SSE 0.000 0.000 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.047 S 0.000 0.000 0.000 0.000 0.094 0.047 0.047 0.000 0.000 0.188 SSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SUBTOTAL 0.000 0.000 0.000 0.000 0.141 0.094 0.141 0.000 0.000 0.376 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2183 TOTAL HOURS OF STABILITY CLASS A 8 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS A 8 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2129 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT 90.29 METER LEVEL DATE PRINTED: 2020/08/10 MEAN WIND SPEED = 9.82 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS B (-1.9< DELTA T<=-1.7 C/100 M)

BROWNS FERRY NUCLEAR PLANT APR 1, 2020 - JUN 30, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.141 0.423 0.000 0.000 0.564 NNE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.094 0.047 0.000 0.000 0.141 SE 0.000 0.000 0.000 0.000 0.047 0.047 0.000 0.000 0.000 0.094 SSE 0.000 0.000 0.000 0.000 0.047 0.047 0.000 0.000 0.000 0.094 S 0.000 0.000 0.000 0.047 0.141 0.094 0.000 0.000 0.000 0.282 SSW 0.000 0.000 0.000 0.000 0.094 0.000 0.000 0.000 0.000 0.094 SW 0.000 0.000 0.000 0.094 0.000 0.000 0.000 0.000 0.000 0.094 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.047 0.047 0.047 0.141 NNW 0.000 0.000 0.000 0.047 0.000 0.000 0.000 0.047 0.000 0.094 SUBTOTAL 0.000 0.000 0.000 0.188 0.329 0.423 0.517 0.094 0.047 1.597 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2183 TOTAL HOURS OF STABILITY CLASS B 36 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS B 34 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2129 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT 90.29 METER LEVEL DATE PRINTED: 2020/08/10 MEAN WIND SPEED = 11.32 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS C (-1.7< DELTA T<=-1.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT APR 1, 2020 - JUN 30, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.564 0.423 0.000 0.000 0.986 NNE 0.000 0.000 0.000 0.000 0.000 0.329 0.658 0.141 0.000 1.127 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.094 0.094 0.000 0.000 0.000 0.188 SE 0.000 0.000 0.000 0.047 0.000 0.376 0.094 0.000 0.000 0.517 SSE 0.000 0.000 0.000 0.000 0.000 0.047 0.047 0.000 0.000 0.094 S 0.000 0.000 0.000 0.047 0.094 0.235 0.000 0.000 0.000 0.376 SSW 0.000 0.000 0.000 0.094 0.000 0.047 0.047 0.047 0.000 0.235 SW 0.000 0.000 0.000 0.047 0.047 0.188 0.000 0.000 0.000 0.282 WSW 0.000 0.000 0.000 0.000 0.000 0.047 0.000 0.000 0.000 0.047 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.047 0.141 0.000 0.188 NW 0.000 0.000 0.000 0.000 0.000 0.094 0.047 0.188 0.094 0.423 NNW 0.000 0.000 0.000 0.000 0.000 0.141 0.047 0.047 0.000 0.235 SUBTOTAL 0.000 0.000 0.000 0.235 0.235 2.161 1.409 0.564 0.094 4.697 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2183 TOTAL HOURS OF STABILITY CLASS C 100 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS C 100 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2129 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT 90.29 METER LEVEL DATE PRINTED: 2020/08/10 MEAN WIND SPEED = 12.89 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS D (-1.5< DELTA T<=-0.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT APR 1, 2020 - JUN 30, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.094 0.188 0.235 0.517 0.376 0.329 0.047 1.785 NNE 0.000 0.000 0.000 0.047 0.423 0.939 0.705 0.000 0.000 2.114 NE 0.000 0.000 0.094 0.047 0.188 0.470 0.047 0.000 0.000 0.845 ENE 0.000 0.000 0.047 0.047 0.047 0.282 0.047 0.000 0.000 0.470 E 0.000 0.000 0.188 0.282 0.141 0.141 0.000 0.000 0.000 0.752 ESE 0.000 0.000 0.141 0.282 0.423 0.986 0.658 0.141 0.188 2.818 SE 0.000 0.000 0.329 0.798 0.000 0.798 0.939 0.423 0.094 3.382 SSE 0.000 0.000 0.141 0.470 0.564 0.798 0.658 0.798 0.141 3.570 S 0.000 0.000 0.517 0.658 0.470 1.268 0.939 0.611 0.000 4.462 SSW 0.000 0.000 0.376 0.564 0.376 0.845 1.080 0.470 0.141 3.852 SW 0.000 0.000 0.282 0.705 0.658 1.409 0.517 0.141 0.000 3.711 WSW 0.000 0.000 0.470 0.752 0.517 1.597 0.705 0.094 0.094 4.227 W 0.000 0.000 0.047 0.517 0.845 1.033 0.892 0.423 0.141 3.899 WNW 0.000 0.000 0.047 0.188 0.752 1.409 0.939 1.080 0.047 4.462 NW 0.000 0.000 0.047 0.376 0.282 0.986 1.221 0.470 0.000 3.382 NNW 0.000 0.000 0.188 0.141 0.282 0.752 0.423 0.188 0.094 2.067 SUBTOTAL 0.000 0.000 3.006 6.059 6.200 14.232 10.146 5.167 0.986 45.796 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2183 TOTAL HOURS OF STABILITY CLASS D 995 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS D 975 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2129 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT 90.29 METER LEVEL DATE PRINTED: 2020/08/10 MEAN WIND SPEED = 11.05 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS E (-0.5< DELTA T<= 1.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT APR 1, 2020 - JUN 30, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.047 0.094 0.141 0.658 0.611 0.188 0.000 1.738 NNE 0.000 0.000 0.047 0.141 0.235 0.329 0.986 0.282 0.000 2.020 NE 0.000 0.000 0.047 0.047 0.094 0.329 0.329 0.047 0.000 0.892 ENE 0.000 0.000 0.047 0.188 0.094 0.470 0.094 0.000 0.000 0.892 E 0.000 0.000 0.000 0.094 0.094 0.282 0.329 0.000 0.000 0.798 ESE 0.000 0.000 0.000 0.141 0.282 1.033 1.315 0.376 0.047 3.194 SE 0.000 0.000 0.141 0.094 0.423 2.302 1.456 0.705 0.188 5.308 SSE 0.000 0.000 0.141 0.376 0.423 1.691 1.033 0.329 0.235 4.227 S 0.000 0.000 0.000 0.235 0.611 0.798 0.892 0.423 0.047 3.006 SSW 0.000 0.047 0.188 0.141 0.329 0.611 1.033 0.047 0.000 2.395 SW 0.000 0.000 0.047 0.094 0.188 0.705 0.564 0.094 0.000 1.691 WSW 0.000 0.000 0.188 0.141 0.094 0.845 0.235 0.047 0.000 1.550 W 0.000 0.000 0.000 0.282 0.329 0.798 0.094 0.047 0.000 1.550 WNW 0.000 0.000 0.000 0.141 0.188 0.470 0.000 0.000 0.000 0.798 NW 0.000 0.000 0.000 0.000 0.047 0.329 0.376 0.000 0.000 0.752 NNW 0.000 0.000 0.000 0.047 0.141 0.376 0.986 0.188 0.047 1.785 SUBTOTAL 0.000 0.047 0.892 2.255 3.711 12.024 10.333 2.771 0.564 32.597 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2183 TOTAL HOURS OF STABILITY CLASS E 722 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS E 694 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2129 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT 90.29 METER LEVEL DATE PRINTED: 2020/08/10 MEAN WIND SPEED = 11.80 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS F ( 1.5< DELTA T<= 4.0 C/100 M)

BROWNS FERRY NUCLEAR PLANT APR 1, 2020 - JUN 30, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.047 0.000 0.000 0.658 0.188 0.000 0.892 NNE 0.000 0.000 0.000 0.000 0.047 0.047 0.564 0.094 0.000 0.752 NE 0.000 0.047 0.000 0.188 0.047 0.141 0.329 0.000 0.000 0.752 ENE 0.000 0.000 0.094 0.047 0.141 0.517 0.235 0.000 0.000 1.033 E 0.000 0.000 0.047 0.235 0.141 0.094 0.235 0.000 0.000 0.752 ESE 0.000 0.000 0.000 0.188 0.188 0.235 0.047 0.000 0.000 0.658 SE 0.000 0.000 0.000 0.094 0.188 0.752 0.141 0.000 0.000 1.174 SSE 0.000 0.000 0.000 0.094 0.470 0.376 0.235 0.282 0.000 1.456 S 0.000 0.000 0.047 0.094 0.141 0.282 0.376 0.094 0.000 1.033 SSW 0.000 0.000 0.047 0.047 0.047 0.329 0.376 0.000 0.000 0.845 SW 0.000 0.000 0.000 0.047 0.000 0.094 0.094 0.000 0.000 0.235 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.047 0.000 0.000 0.047 W 0.000 0.000 0.047 0.047 0.047 0.047 0.047 0.000 0.000 0.235 WNW 0.000 0.000 0.047 0.094 0.094 0.282 0.000 0.047 0.000 0.564 NW 0.000 0.000 0.047 0.094 0.094 0.188 0.000 0.000 0.000 0.423 NNW 0.000 0.000 0.000 0.047 0.047 0.235 0.282 0.047 0.000 0.658 SUBTOTAL 0.000 0.047 0.376 1.362 1.691 3.617 3.664 0.752 0.000 11.508 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2183 TOTAL HOURS OF STABILITY CLASS F 249 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS F 245 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2129 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT 90.29 METER LEVEL DATE PRINTED: 2020/08/10 MEAN WIND SPEED = 10.92 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS G (DELTA T > 4.0 C/100 M)

BROWNS FERRY NUCLEAR PLANT APR 1, 2020 - JUN 30, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.047 NNE 0.000 0.000 0.000 0.047 0.047 0.000 0.047 0.094 0.000 0.235 NE 0.000 0.000 0.047 0.047 0.047 0.094 0.094 0.188 0.000 0.517 ENE 0.000 0.000 0.000 0.094 0.094 0.235 0.235 0.000 0.000 0.658 E 0.000 0.000 0.000 0.094 0.047 0.000 0.000 0.000 0.000 0.141 ESE 0.000 0.000 0.000 0.141 0.141 0.000 0.000 0.000 0.000 0.282 SE 0.000 0.000 0.094 0.047 0.000 0.094 0.047 0.000 0.000 0.282 SSE 0.000 0.000 0.000 0.047 0.000 0.094 0.094 0.000 0.000 0.235 S 0.000 0.000 0.000 0.000 0.000 0.047 0.000 0.000 0.000 0.047 SSW 0.000 0.047 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.094 SW 0.000 0.047 0.094 0.000 0.000 0.000 0.000 0.000 0.000 0.141 WSW 0.000 0.000 0.094 0.000 0.000 0.000 0.000 0.000 0.000 0.094 W 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.047 WNW 0.000 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.047 NW 0.000 0.000 0.000 0.047 0.094 0.188 0.000 0.000 0.000 0.329 NNW 0.000 0.000 0.000 0.094 0.094 0.047 0.000 0.000 0.000 0.235 SUBTOTAL 0.000 0.141 0.423 0.705 0.564 0.798 0.517 0.282 0.000 3.429 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2183 TOTAL HOURS OF STABILITY CLASS G 73 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS G 73 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2129 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT 90.29 METER LEVEL DATE PRINTED: 2020/08/10 MEAN WIND SPEED = 8.58 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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Table8C3rdQuarterJFDElevatedReleases JointFrequencyDistributionInPercent

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS A (DELTA T<=-1.9 C/100 M)

BROWNS FERRY NUCLEAR PLANT JUL 1, 2020 - SEP 30, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.000 0.091 0.000 0.000 0.091 NNE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.000 0.000 0.000 0.228 0.594 0.228 0.000 0.000 1.050 SSE 0.000 0.000 0.000 0.091 0.137 0.137 0.137 0.000 0.000 0.502 S 0.000 0.000 0.000 0.000 0.000 0.046 0.046 0.000 0.046 0.137 SSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SW 0.000 0.000 0.000 0.000 0.000 0.000 0.046 0.000 0.000 0.046 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.000 0.000 0.000 0.046 0.000 0.000 0.046 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.046 0.000 0.000 0.046 SUBTOTAL 0.000 0.000 0.000 0.091 0.365 0.776 0.639 0.000 0.046 1.918 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2190 TOTAL HOURS OF STABILITY CLASS A 42 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS A 42 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2190 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT 90.29 METER LEVEL DATE PRINTED: 2020/10/13 MEAN WIND SPEED = 10.83 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS B (-1.9< DELTA T<=-1.7 C/100 M)

BROWNS FERRY NUCLEAR PLANT JUL 1, 2020 - SEP 30, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.137 0.046 0.000 0.000 0.183 NNE 0.000 0.000 0.000 0.000 0.000 0.137 0.046 0.000 0.000 0.183 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.046 0.000 0.046 0.000 0.091 SE 0.000 0.000 0.000 0.091 0.228 0.228 0.046 0.046 0.000 0.639 SSE 0.000 0.000 0.046 0.137 0.137 0.183 0.046 0.000 0.000 0.548 S 0.000 0.000 0.000 0.046 0.046 0.046 0.000 0.091 0.000 0.228 SSW 0.000 0.000 0.000 0.046 0.000 0.046 0.000 0.000 0.000 0.091 SW 0.000 0.000 0.000 0.000 0.000 0.091 0.137 0.000 0.000 0.228 WSW 0.000 0.000 0.000 0.000 0.000 0.091 0.137 0.000 0.000 0.228 W 0.000 0.000 0.000 0.000 0.000 0.320 0.000 0.000 0.000 0.320 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.137 0.000 0.000 0.137 NW 0.000 0.000 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.046 NNW 0.000 0.000 0.000 0.000 0.000 0.091 0.091 0.000 0.000 0.183 SUBTOTAL 0.000 0.000 0.046 0.320 0.411 1.461 0.685 0.183 0.000 3.105 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2190 TOTAL HOURS OF STABILITY CLASS B 68 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS B 68 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2190 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT 90.29 METER LEVEL DATE PRINTED: 2020/10/13 MEAN WIND SPEED = 10.65 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS C (-1.7< DELTA T<=-1.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT JUL 1, 2020 - SEP 30, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.091 0.046 0.046 0.000 0.183 NNE 0.000 0.000 0.000 0.000 0.000 0.091 0.046 0.046 0.000 0.183 NE 0.000 0.000 0.000 0.000 0.000 0.091 0.000 0.000 0.000 0.091 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.046 0.091 0.046 0.000 0.000 0.183 SE 0.000 0.000 0.000 0.228 0.137 0.411 0.046 0.091 0.000 0.913 SSE 0.000 0.000 0.046 0.274 0.274 0.228 0.046 0.046 0.000 0.913 S 0.000 0.000 0.000 0.274 0.091 0.046 0.046 0.000 0.000 0.457 SSW 0.000 0.000 0.046 0.046 0.000 0.091 0.000 0.046 0.000 0.228 SW 0.000 0.000 0.000 0.228 0.046 0.183 0.091 0.000 0.000 0.548 WSW 0.000 0.000 0.000 0.137 0.000 0.046 0.000 0.000 0.000 0.183 W 0.000 0.000 0.000 0.137 0.137 0.548 0.046 0.000 0.000 0.868 WNW 0.000 0.000 0.000 0.000 0.091 0.320 0.000 0.000 0.000 0.411 NW 0.000 0.000 0.000 0.000 0.046 0.046 0.046 0.046 0.000 0.183 NNW 0.000 0.000 0.000 0.000 0.046 0.274 0.137 0.000 0.000 0.457 SUBTOTAL 0.000 0.000 0.091 1.324 0.913 2.557 0.594 0.320 0.000 5.799 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2190 TOTAL HOURS OF STABILITY CLASS C 127 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS C 127 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2190 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT 90.29 METER LEVEL DATE PRINTED: 2020/10/13 MEAN WIND SPEED = 9.01 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS D (-1.5< DELTA T<=-0.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT JUL 1, 2020 - SEP 30, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.228 0.228 0.091 0.548 0.457 0.183 0.046 1.781 NNE 0.000 0.000 0.137 0.183 0.320 0.502 0.639 0.046 0.000 1.826 NE 0.000 0.000 0.091 0.091 0.183 0.685 0.091 0.046 0.000 1.187 ENE 0.000 0.000 0.183 0.046 0.046 0.502 0.000 0.000 0.000 0.776 E 0.000 0.000 0.228 0.183 0.274 0.320 0.137 0.000 0.000 1.142 ESE 0.000 0.000 0.228 0.411 0.594 1.050 0.548 0.000 0.000 2.831 SE 0.000 0.046 0.548 1.187 0.639 0.776 0.320 0.091 0.000 3.607 SSE 0.000 0.000 0.822 0.731 0.274 0.913 0.183 0.274 0.000 3.196 S 0.000 0.000 0.822 0.776 0.548 1.279 0.685 0.548 0.137 4.795 SSW 0.000 0.000 0.913 0.776 0.411 0.502 0.868 0.274 0.000 3.744 SW 0.000 0.000 0.959 1.005 0.548 0.868 0.548 0.000 0.000 3.927 WSW 0.000 0.000 0.411 1.598 0.959 0.594 0.502 0.000 0.000 4.064 W 0.000 0.000 0.183 1.142 0.913 1.279 0.228 0.000 0.000 3.744 WNW 0.000 0.000 0.091 0.228 0.457 0.868 0.502 0.091 0.000 2.237 NW 0.000 0.000 0.046 0.137 0.274 0.274 0.274 0.046 0.046 1.096 NNW 0.000 0.000 0.000 0.228 0.320 0.594 0.457 0.000 0.000 1.598 SUBTOTAL 0.000 0.046 5.890 8.950 6.849 11.553 6.438 1.598 0.228 41.553 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2190 TOTAL HOURS OF STABILITY CLASS D 910 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS D 910 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2190 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT 90.29 METER LEVEL DATE PRINTED: 2020/10/13 MEAN WIND SPEED = 8.31 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS E (-0.5< DELTA T<= 1.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT JUL 1, 2020 - SEP 30, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.046 0.046 0.183 0.913 1.324 0.091 0.000 2.603 NNE 0.000 0.000 0.046 0.046 0.183 1.324 1.781 0.137 0.000 3.516 NE 0.000 0.000 0.137 0.137 0.411 0.685 0.868 0.091 0.046 2.374 ENE 0.000 0.000 0.137 0.091 0.137 0.776 0.320 0.046 0.000 1.507 E 0.000 0.000 0.091 0.183 0.091 0.594 0.959 0.091 0.000 2.009 ESE 0.000 0.000 0.091 0.274 0.502 1.324 1.416 0.320 0.000 3.927 SE 0.000 0.000 0.091 0.228 0.731 1.644 1.050 0.091 0.000 3.836 SSE 0.000 0.000 0.274 0.228 0.959 1.233 0.091 0.046 0.000 2.831 S 0.000 0.000 0.137 0.685 0.868 0.868 0.548 0.000 0.000 3.105 SSW 0.000 0.000 0.091 0.320 0.091 0.411 0.365 0.137 0.000 1.416 SW 0.000 0.000 0.183 0.457 0.320 0.548 0.228 0.000 0.000 1.735 WSW 0.000 0.000 0.000 0.228 0.457 0.183 0.046 0.046 0.000 0.959 W 0.000 0.000 0.137 0.274 0.594 0.274 0.137 0.000 0.000 1.416 WNW 0.000 0.000 0.091 0.228 0.183 0.365 0.046 0.000 0.000 0.913 NW 0.000 0.000 0.183 0.137 0.228 0.137 0.091 0.000 0.000 0.776 NNW 0.000 0.000 0.091 0.183 0.228 0.502 0.274 0.091 0.000 1.370 SUBTOTAL 0.000 0.000 1.826 3.744 6.164 11.781 9.543 1.187 0.046 34.292 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2190 TOTAL HOURS OF STABILITY CLASS E 751 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS E 751 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2190 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT 90.29 METER LEVEL DATE PRINTED: 2020/10/13 MEAN WIND SPEED = 10.12 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS F ( 1.5< DELTA T<= 4.0 C/100 M)

BROWNS FERRY NUCLEAR PLANT JUL 1, 2020 - SEP 30, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.046 0.091 0.046 0.548 0.411 0.000 0.000 1.142 NNE 0.000 0.046 0.137 0.137 0.091 0.457 0.183 0.046 0.000 1.096 NE 0.000 0.000 0.091 0.137 0.091 0.685 0.274 0.046 0.000 1.324 ENE 0.000 0.046 0.046 0.046 0.046 0.457 0.183 0.046 0.000 0.868 E 0.000 0.000 0.000 0.091 0.228 0.685 0.137 0.000 0.000 1.142 ESE 0.000 0.000 0.183 0.137 0.183 0.320 0.320 0.000 0.000 1.142 SE 0.000 0.000 0.137 0.091 0.274 0.457 0.365 0.000 0.000 1.324 SSE 0.000 0.000 0.183 0.137 0.137 0.411 0.000 0.000 0.000 0.868 S 0.000 0.000 0.183 0.091 0.274 0.137 0.000 0.000 0.000 0.685 SSW 0.000 0.046 0.228 0.091 0.000 0.000 0.091 0.000 0.000 0.457 SW 0.000 0.000 0.046 0.091 0.000 0.000 0.000 0.000 0.000 0.137 WSW 0.000 0.046 0.046 0.091 0.000 0.000 0.000 0.000 0.000 0.183 W 0.000 0.000 0.046 0.137 0.000 0.000 0.046 0.000 0.000 0.228 WNW 0.000 0.000 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.046 NW 0.000 0.000 0.000 0.228 0.091 0.000 0.000 0.000 0.000 0.320 NNW 0.000 0.000 0.091 0.046 0.091 0.046 0.137 0.000 0.000 0.411 SUBTOTAL 0.000 0.183 1.461 1.644 1.553 4.247 2.146 0.137 0.000 11.370 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2190 TOTAL HOURS OF STABILITY CLASS F 249 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS F 249 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2190 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT 90.29 METER LEVEL DATE PRINTED: 2020/10/13 MEAN WIND SPEED = 8.69 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS G (DELTA T > 4.0 C/100 M)

BROWNS FERRY NUCLEAR PLANT JUL 1, 2020 - SEP 30, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.046 0.000 0.000 0.046 0.046 0.000 0.000 0.137 NNE 0.000 0.000 0.000 0.046 0.000 0.137 0.411 0.000 0.000 0.594 NE 0.000 0.000 0.046 0.000 0.000 0.046 0.183 0.000 0.000 0.274 ENE 0.000 0.000 0.000 0.000 0.046 0.091 0.046 0.000 0.000 0.183 E 0.000 0.000 0.000 0.000 0.091 0.091 0.000 0.000 0.000 0.183 ESE 0.000 0.046 0.000 0.046 0.046 0.000 0.000 0.000 0.000 0.137 SE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSE 0.000 0.000 0.000 0.000 0.000 0.228 0.000 0.000 0.000 0.228 S 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSW 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.046 SW 0.000 0.000 0.046 0.046 0.000 0.000 0.000 0.000 0.000 0.091 WSW 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.046 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNW 0.000 0.000 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.046 SUBTOTAL 0.000 0.046 0.137 0.228 0.183 0.685 0.685 0.000 0.000 1.963 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2190 TOTAL HOURS OF STABILITY CLASS G 43 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS G 43 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2190 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT 90.29 METER LEVEL DATE PRINTED: 2020/10/13 MEAN WIND SPEED = 9.80 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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Table8D4thQuarterJFDElevatedReleases JointFrequencyDistributionInPercent

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS A (DELTA T<=-1.9 C/100 M)

BROWNS FERRY NUCLEAR PLANT OCT 1, 2020 - DEC 31, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.000 0.000 0.000 0.000 0.000 0.136 0.000 0.000 0.136 SSE 0.000 0.000 0.000 0.000 0.045 0.091 0.091 0.045 0.000 0.273 S 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SW 0.000 0.000 0.000 0.000 0.000 0.045 0.000 0.000 0.000 0.045 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SUBTOTAL 0.000 0.000 0.000 0.000 0.045 0.136 0.227 0.045 0.000 0.455 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2200 TOTAL HOURS OF STABILITY CLASS A 10 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS A 10 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2200 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT 90.29 METER LEVEL DATE PRINTED: 2021/01/04 MEAN WIND SPEED = 13.16 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS B (-1.9< DELTA T<=-1.7 C/100 M)

BROWNS FERRY NUCLEAR PLANT OCT 1, 2020 - DEC 31, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.045 0.045 0.000 0.000 0.000 0.091 SE 0.000 0.000 0.000 0.045 0.000 0.000 0.045 0.000 0.000 0.091 SSE 0.000 0.000 0.000 0.091 0.136 0.045 0.091 0.000 0.000 0.364 S 0.000 0.000 0.000 0.000 0.000 0.045 0.045 0.000 0.000 0.091 SSW 0.000 0.000 0.000 0.000 0.000 0.045 0.000 0.000 0.000 0.045 SW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SUBTOTAL 0.000 0.000 0.000 0.136 0.182 0.182 0.182 0.000 0.000 0.682 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2200 TOTAL HOURS OF STABILITY CLASS B 15 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS B 15 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2200 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT 90.29 METER LEVEL DATE PRINTED: 2021/01/04 MEAN WIND SPEED = 9.74 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS C (-1.7< DELTA T<=-1.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT OCT 1, 2020 - DEC 31, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.091 0.227 0.000 0.000 0.318 NNE 0.000 0.000 0.000 0.000 0.000 0.045 0.136 0.000 0.000 0.182 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.045 0.091 0.364 0.000 0.000 0.000 0.500 SE 0.000 0.000 0.000 0.000 0.000 0.182 0.000 0.091 0.000 0.273 SSE 0.000 0.000 0.000 0.045 0.091 0.000 0.091 0.091 0.000 0.318 S 0.000 0.000 0.000 0.000 0.045 0.000 0.091 0.000 0.000 0.136 SSW 0.000 0.000 0.000 0.091 0.000 0.000 0.000 0.000 0.000 0.091 SW 0.000 0.000 0.000 0.000 0.000 0.136 0.000 0.000 0.000 0.136 WSW 0.000 0.000 0.000 0.000 0.000 0.045 0.000 0.000 0.000 0.045 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.136 0.000 0.136 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNW 0.000 0.000 0.000 0.000 0.000 0.045 0.045 0.045 0.000 0.136 SUBTOTAL 0.000 0.000 0.000 0.182 0.227 0.909 0.591 0.364 0.000 2.273 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2200 TOTAL HOURS OF STABILITY CLASS C 50 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS C 50 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2200 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT 90.29 METER LEVEL DATE PRINTED: 2021/01/04 MEAN WIND SPEED = 11.90 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS D (-1.5< DELTA T<=-0.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT OCT 1, 2020 - DEC 31, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.136 0.273 0.136 2.000 1.091 0.273 0.000 3.909 NNE 0.000 0.000 0.045 0.182 0.227 2.045 0.591 0.182 0.136 3.409 NE 0.000 0.000 0.045 0.091 0.182 0.455 0.091 0.000 0.000 0.864 ENE 0.000 0.000 0.091 0.182 0.364 0.318 0.000 0.000 0.000 0.955 E 0.000 0.000 0.045 0.136 0.136 0.091 0.091 0.136 0.045 0.682 ESE 0.000 0.000 0.136 0.636 0.500 1.273 0.955 0.091 0.000 3.591 SE 0.000 0.000 0.318 0.591 0.500 0.455 0.455 0.364 0.091 2.773 SSE 0.000 0.000 0.364 0.318 0.273 0.636 0.455 0.273 0.045 2.364 S 0.000 0.000 0.136 0.500 0.091 0.318 0.136 0.091 0.091 1.364 SSW 0.000 0.045 0.318 0.136 0.045 0.273 0.045 0.000 0.045 0.909 SW 0.000 0.045 0.273 0.500 0.045 0.273 0.045 0.000 0.000 1.182 WSW 0.000 0.000 0.318 0.364 0.500 0.591 0.455 0.182 0.136 2.545 W 0.000 0.091 0.000 0.318 0.727 1.318 0.773 0.500 0.000 3.727 WNW 0.000 0.000 0.136 0.500 0.364 0.818 0.864 1.136 0.318 4.136 NW 0.000 0.000 0.091 0.318 0.636 0.500 1.136 1.136 0.136 3.955 NNW 0.000 0.000 0.045 0.136 0.136 0.636 1.591 0.591 0.045 3.182 SUBTOTAL 0.000 0.182 2.500 5.182 4.864 12.000 8.773 4.955 1.091 39.545 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2200 TOTAL HOURS OF STABILITY CLASS D 870 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS D 870 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2200 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT 90.29 METER LEVEL DATE PRINTED: 2021/01/04 MEAN WIND SPEED = 11.25 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS E (-0.5< DELTA T<= 1.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT OCT 1, 2020 - DEC 31, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.091 0.045 0.091 0.636 0.955 0.091 0.000 1.909 NNE 0.000 0.000 0.045 0.000 0.136 0.909 0.273 0.000 0.000 1.364 NE 0.000 0.000 0.045 0.045 0.136 0.864 0.364 0.091 0.000 1.545 ENE 0.000 0.000 0.000 0.136 0.182 0.182 0.091 0.091 0.000 0.682 E 0.000 0.000 0.136 0.091 0.318 0.409 0.273 0.364 0.000 1.591 ESE 0.000 0.000 0.000 0.182 0.273 1.545 2.273 0.364 0.000 4.636 SE 0.000 0.000 0.091 0.273 0.091 1.455 3.364 0.818 0.227 6.318 SSE 0.000 0.000 0.000 0.091 0.273 1.136 1.136 1.409 0.727 4.773 S 0.000 0.000 0.045 0.182 0.091 0.955 0.364 0.818 0.182 2.636 SSW 0.000 0.000 0.045 0.182 0.091 0.500 0.364 0.091 0.045 1.318 SW 0.000 0.000 0.045 0.136 0.091 0.591 0.091 0.000 0.000 0.955 WSW 0.000 0.000 0.000 0.182 0.091 0.409 0.136 0.000 0.000 0.818 W 0.000 0.000 0.045 0.136 0.136 0.545 0.364 0.045 0.000 1.273 WNW 0.000 0.000 0.091 0.091 0.273 0.455 0.318 0.000 0.000 1.227 NW 0.000 0.000 0.091 0.227 0.318 0.182 0.727 0.091 0.000 1.636 NNW 0.000 0.000 0.136 0.000 0.045 0.227 0.455 0.045 0.000 0.909 SUBTOTAL 0.000 0.000 0.909 2.000 2.636 11.000 11.545 4.318 1.182 33.591 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2200 TOTAL HOURS OF STABILITY CLASS E 739 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS E 739 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2200 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT 90.29 METER LEVEL DATE PRINTED: 2021/01/04 MEAN WIND SPEED = 13.10 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS F ( 1.5< DELTA T<= 4.0 C/100 M)

BROWNS FERRY NUCLEAR PLANT OCT 1, 2020 - DEC 31, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.182 0.682 0.182 0.000 1.045 NNE 0.000 0.000 0.000 0.045 0.045 0.318 0.364 0.136 0.000 0.909 NE 0.000 0.000 0.000 0.000 0.000 0.364 0.136 0.000 0.000 0.500 ENE 0.000 0.000 0.000 0.000 0.045 0.182 0.409 0.045 0.000 0.682 E 0.000 0.000 0.000 0.091 0.045 0.318 0.227 0.000 0.000 0.682 ESE 0.000 0.000 0.091 0.227 0.182 0.909 0.227 0.000 0.000 1.636 SE 0.000 0.000 0.091 0.091 0.273 0.818 0.727 0.000 0.000 2.000 SSE 0.000 0.000 0.045 0.091 0.318 1.091 0.727 0.455 0.000 2.727 S 0.000 0.000 0.000 0.045 0.364 0.682 0.591 0.273 0.000 1.955 SSW 0.000 0.000 0.000 0.000 0.091 0.136 0.136 0.000 0.000 0.364 SW 0.000 0.000 0.045 0.000 0.000 0.045 0.000 0.000 0.000 0.091 WSW 0.000 0.000 0.000 0.273 0.000 0.136 0.000 0.000 0.000 0.409 W 0.000 0.000 0.045 0.227 0.045 0.182 0.136 0.000 0.000 0.636 WNW 0.000 0.045 0.182 0.182 0.136 0.091 0.000 0.000 0.000 0.636 NW 0.000 0.045 0.045 0.136 0.000 0.273 0.000 0.000 0.000 0.500 NNW 0.000 0.000 0.000 0.091 0.000 0.182 0.273 0.000 0.000 0.545 SUBTOTAL 0.000 0.091 0.545 1.500 1.545 5.909 4.636 1.091 0.000 15.318 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2200 TOTAL HOURS OF STABILITY CLASS F 337 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS F 337 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2200 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT 90.29 METER LEVEL DATE PRINTED: 2021/01/04 MEAN WIND SPEED = 11.11 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BrownsFerryNuclearPlant Units1,2and3 2020AnnualRadioactiveEffluentReleaseReport MeteorologicalData

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JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS G (DELTA T > 4.0 C/100 M)

BROWNS FERRY NUCLEAR PLANT OCT 1, 2020 - DEC 31, 2020 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.091 0.000 0.000 0.182 0.000 0.000 0.273 NNE 0.000 0.000 0.045 0.045 0.045 0.000 0.364 0.045 0.000 0.545 NE 0.000 0.000 0.045 0.045 0.000 0.045 0.136 0.000 0.000 0.273 ENE 0.000 0.000 0.045 0.045 0.045 0.273 0.409 0.000 0.000 0.818 E 0.000 0.000 0.000 0.091 0.091 0.227 0.136 0.000 0.000 0.545 ESE 0.000 0.000 0.136 0.136 0.182 0.409 0.000 0.000 0.000 0.864 SE 0.000 0.000 0.000 0.227 0.273 0.273 0.000 0.000 0.000 0.773 SSE 0.000 0.000 0.045 0.091 0.136 0.364 0.136 0.000 0.000 0.773 S 0.000 0.000 0.136 0.136 0.091 0.182 0.182 0.045 0.000 0.773 SSW 0.000 0.000 0.045 0.136 0.136 0.136 0.045 0.000 0.000 0.500 SW 0.000 0.000 0.045 0.182 0.045 0.182 0.000 0.000 0.000 0.455 WSW 0.000 0.000 0.000 0.182 0.091 0.045 0.000 0.000 0.000 0.318 W 0.000 0.045 0.000 0.045 0.091 0.000 0.000 0.000 0.000 0.182 WNW 0.000 0.000 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.045 NW 0.000 0.000 0.091 0.182 0.091 0.000 0.000 0.000 0.000 0.364 NNW 0.000 0.045 0.227 0.045 0.091 0.000 0.182 0.045 0.000 0.636 SUBTOTAL 0.000 0.091 0.909 1.682 1.409 2.136 1.773 0.136 0.000 8.136 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2200 TOTAL HOURS OF STABILITY CLASS G 179 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS G 179 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2200 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT 90.29 METER LEVEL DATE PRINTED: 2021/01/04 MEAN WIND SPEED = 8.60 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

ML21120A211

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