ML17331A464
| 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~)