ML17319B502

Forwards Update to Util Activities Re NUREG-0737,Item III.A.2.2, Emergency Preparedness Meteorological Data.

ML17319B502
Person / Time
Site:	Cook
Issue date:	08/31/1982
From:	HUNTER R S INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:	DENTON H R Office of Nuclear Reactor Regulation
References
RTR-NUREG-0737, RTR-NUREG-737, TASK-3.A.2.2, TASK-TM AEP:NRC:0678B, AEP:NRC:678B, NUDOCS 8209030219
Download: ML17319B502 (7)

Text

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NO.,DOCKETPAOIL':50 315Donald0,C<<aok.NuolearPowerPlantiUnit1,Indiana805000315'50~316Donal,d0,~CookNuclearPowerPlant<<Uni;t2,'Indiana805000316AUTHBYNAMEAUTHORAFFILIATION HUNTERgR~STIndianaLMichiganElectricCo,<<REICI'P~NAMERECIPIENT AFFIL'IATION DENTONgH~REOfficeofNuclear'Reactor<<Regulqtioni Director'SUBJEOT!

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'REPAREDNESS METEOROLOGICAL DATAMr.HaroldR.Denton,DirectorOfficeofNuclearReactorRegulation U.S.NuclearRegulatory Commission Washington, D.C.20555

DearMr.Denton:

Theattachment tothisletterprovidesyouwithanupdateonouractivities relatingtoItemIII.A.2.2 ofNUREG-0737, "Emergency Preparedness<<Meteorological Data"ascommitted toinourletterNo.AEP:NRC:0678A datedJune28,1982.Thisdocumenthasbeenpreparedfollowing Corporate Procedures whichincorporate areasonable setofcontrolstoensureitsaccuracyandcompleteness priortosignature bytheundersigned.

Verytrulyyours,RSH/sagAttachment R.S.HunterVicePresident cc:JohnE.Dolan-ColumbusM.P.AlexichR.W.Jurgensen W.G.Smith,Jr-BridgmanR.C.CallenG.CharnoffJoeWilliams, Jr.NRCResidentInspector atCookPlant-Bridgman82090302050003i5=q820831PDRADOGKPDRF 33~rlilI,l0'CF-P'3'FF3F%rr~3r~~<<k.h,!'13*rl3~1~)llI$3'FIIII34"lIlFFIFri1~1ilL3 ATTACHMENT TOAEP:NRC:0678B ITEMIII.A.2,2.

(EMERGENCY PREPAREDNESS-METEOROLOGICAL DATA)Thisitemisconcerned withthreesubjects'.

(1)Meteorological

.Measurements Program,(2)ClassADoseAssessment Capability, and(3)ClassBDoseAssessment Capability.

METEOROLOGICAL HEASUREMENTS PROGRAMWehavebeeninformedthattheNRChasrecentlyconducted aseriesoftestsalongLakeMichiganattheKewauneeNuclearPlantbetweenMay28andJune8,1982.Itisourunderstanding thatthepurposeofthesestudieswastoevaluatedifferent meteorological dispersion modelsandtodetermine theoptimumnumberofmeteorological stationsthatwouldprovideusabledataforthesemodels.Currently, theNRCrequirements forsupplementary meteorological information arenotclearlydefined.NUREG-0654 andRegulatory Guide1.23discussthesubjectbutdonotgivedirectguidelines tobefollowed.

WeplantoreviewthereportontheNRCKewauneestudywhenwereceiveit,Weplantoawaitfurtherclarification andNRCguidance, onthismatterpriortoconsidering thedesirability ofsystemmodifications fortheCookPlant.CLASSADOSEASSESSMENT CAPABILITY ClassAdoseassessment capability existsthroughtheuseofPickard,LoweandGarrick's (PL&G)ACRISOprogramtotheextentdescribed inAEP:NRC:0678A.

Theapplication oftheClassAmodeltotheCookPlantislimitedin'hatitdoesnotaccountforcomplexflowpatternsthatmayoccurduringalakebreezesituation anditdoesnotaccountforPlant-specific radiation monitorandaccidentdefaultinformation.

Inordertomodelcomplexflowpatterns, PL&Gisproposing amodifiedGaussianplumesegmentmodelcalledMIDRACwhichtheyclassifyasanenhancedClassAmodel.Wehavethisproposalunderevaluation.

TheHIDRACsubroutine wouldutilizeareal-time site-specific algorithm foruseinturbulent internalboundarylayerandlakebreezecalculations (seediscussion underClassBDoseAssessment Capability)

.Wearealsoevaluating PL&G'sproposaltoaugmentourClassAcapability byupdatingtheACRISOprogramfiletocontainin-Plantradiation monitorandaccidentdefaultinformation.

Whenwehavecompleted theupgrading ofourmodel,wewillprovideyouwithadescription ofourClassAdoseassessment capability.

CLASSBDOSEASSESSMENT CAPABILITY Wearepresently evaluating proposals fromtwoconsultants toprovideuswithClassBemergency diffusion anddosecalculations.

Bothconsultants haveindicated thattheydonothaveaClassBmodelthatfullymeetstheNRCrequirements asdefinedinRevision1ofNUREG-0654; however,anenhancedClassAmodelisavailable'hich willconsidersitespecificphenomena thataffectplumetransport.

Weexpectthatoperational implementation ofthisdoseassessment capability attheCookPlantwilltakeplacebytheJune1983dategiveninNUREG-0737, andpriortothisdatewewillprovideyouwithadescription ofourplansforaClassBdoseassessment capability.

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