ML17331A464

Discusses Depth of Water Coverage Over Irradiated Fuel During Mode 6 Operation.Based on Wording of 800815 Ltr,Util Does Not Meet Condition of at Least 23 Ft of Water.Revisions to Tech Specs 3.4.9.10 Will Be Formally Submitted

ML17331A464
Person / Time
Site:	Cook
Issue date:	09/26/1980
From:	HUNTER R S INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:	DENTON H R Office of Nuclear Reactor Regulation
References
NUDOCS 8010020497
Download: ML17331A464 (5)

Text

e..~WREGULAORYINFORMATION DISTRIBUTIOIRSYSTE.I(RIDS)IACCESSION NBR:8010020497

"',"-.DOC~DATE:80/09/26NOTARIZED:

NOFACIDonaldC.CookNuclearPowerP1antRUnit1EIndiana80-316onaldC.CookNuclearPowerPlantiUnit2rIndiana8AUTHORAFFILIATION UNTERER.ST Indiana8'Iichigan ElectricCo.ECIP.NATERECIPIKNT AFFILIATION DENTorIRH

~R.OfficeofNuclearReactorRegulationi DirectorDOCKETrr0500031505000316

SUBJECT:

Discusses deothofwatercoverageoverirradiated fuelduringMode6operation.Based onwordingof800815ltrrutildoesnotmeetcondition ofat1'east23ftofwater.Revisions toTechSoec3.4.9.10willbeformallysubmitted, OISTRISL'TIOM COOE:AOOISCOPIESRECEIVEO:LTR

~ENCL~SIZE:TITLE:GeneralDistribution forafterIssuanceofOoerating LicNOTES:18K:3 copiesal1material.Sena3cooiesofallmaterialtoI8K.0500031505000316EXTERNAL:

ACRSBASIC0905RECIPIKJTIOCODE/VANE ACTIONVARGARS~04INTERNAL'/DIDpHU~lFAC08NRCPDR02ORASSESSBR10COPIESLTTRENCL1313111110161611RECIPIENT IDCODE/NA'0IE I8EREGFILELPDR06110103COPIESLTTRENCL101111Oppel.TOTALNu".BEROFCOPIESREQUIRED:

LTTR~*ENCL INDIANALMICHIGANELECTRICCOMPANYP.O.BOX18BOWLINGGREENSTATIONNEWYORK,N.Y.10004AEP:NRC:0463 September 26,1980DonaldC.CookNuclearPlantUnitNos.1and2DocketNos.50-315and50-316LicenseNos.DPR-58andDPR-74DepthofWaterCoverageOverIrradiated FuelDuringMode6'perations Mr.HaroldR.Denton,DirectorOfficeofNuclearReactorRegulation U.S.NuclearRegulatory Commission Washington, D.C.20555

DearMr.Denton:

ByletterdatedAugust15,1980,allWestinghouse Pressurized WaterReactorLicensees were-notifiedbyyourofficethatWestinghouse StandardTechnical Specifications andBaseshadbeenmodifiedtorequireatleast23feetofwateroverthetopofthereactorpressurevesselflangeduringmovementoffuelassemblies orcontrolrods.Licensees wererequested toadvisewhatmeasures, ifany,wererequiredtomeetthismodifiedrequirement andtoprovideassurance thatexposureoffuelassem-bliesandcontrolrodscannotoccurduringtransferwhiletheplantisinMode6.PleasebeadvisedthatUnitsNo.1and2oftheDonaldC.CookNuclearPlantareincompliance withtheaboverequirements duringtheperformance ofactualrefueling operations; however,basedontheprecisewordingofyourletter,wedonotmeetthecondition of"atleast23feetofwater"whileperforming theinitialunlatching ofcontrolrods,norwhenperforming thefinallatching, whichisfollowedbyadragtestonreassembled controlrods.Forreasonsofoperating efficiency andenhancedpersonnel safety,theunlatching andlatchingstepsarecarriedoutfromaplatformwhoseelevation onlyallowsapproximately 16feetofwatercoveroverthereactorpressurevesselflange;theinitialfillingandthefinaldrainingoftherefueling pitareinterrupted fortheseoperations.

Thecontrolroddragtestinvolvessomemovement(uptoabout36inches)ofthecontrolrods;asmallermovementoccursinconnection withlatchingandunlatching.

Duringunlatching, latchinganddragtesting,whichamounttoatotaltimeofapproxiIIIately 10hours,thereisstillaminimumof23feetof,wateroverthefuel.no/5,ji80X0080gq7 Itshouldbenotedthatduringtheseoperations, theupperin-ternalsareinplaceandthat,"transfer" offuelassemblies orcontrolrodsdoesnotoccur.Therefore wemeet'heintentofyourletter"topreventinadvertent exposureofafuelassemblyduringtransfer."

Forcompleteness wewillformallysubmitTechnical Specification

• revisions to3.4.9.10commensurate withouroperating practiceinthenearfuture.Verytrulyyours,cc:attachedR.S.HunterVicePresident CC'.CharnoffR.C.CallenD.V.Shaller-BridgmanJohnE.DolanR.W.Jurgensen NRCRegionIIIResidentInspector atCookPlant-Bridgman IIi~)