ML17334B820

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Part 21 Rept Re Defective & Missing Welds Found on Ice Basket Bottom Cross Bar & Bottom Basket Grids During Insp of Unit 1 Ice Condenser.Investigation Ongoing.Defective Ice Basket Bottom Rims Will Be Repaired or Replaced
ML17334B820
Person / Time
Site: Cook  American Electric Power icon.png
Issue date: 06/23/1998
From: KELLY M
UNION ELECTRIC CO.
To:
NRC
References
REF-PT21-98 NUDOCS 9807170287
Download: ML17334B820 (5)


Text

CATEGORY1~REGULATYINFORMATIONDISTRIBUTIONSYSTEM(RIDS)ACCESSIONNBR:9807170287DOC.DATE:98/06/23NOTARIZED:NODOCKETFACIL:50-315DonaldC.CookNuclearPowerPlant,Unit1,IndianaM0500031550-"'16DonaldC.CookNuclearPowerPlant,Unit2,IndianaM05000316AUTH.NAMEAUTHORAFFILIATIONKELLY,M.UnionElectricCo.RECIP.NAMERECIPIENTAFFILIATIONNRC-NoDetailedAffiliationGiven

SUBJECT:

Part21reptredefective&missingweldsfoundonicebasketbottomcrossbar&bottombasketgridsduringinspofunit1icecondenser.Investigationongoing.Defectiveicebasketbottomrimswillberepairedorreplaced.DISTRIBUTIONCODE:IE19TCOPIESRECEIVED:LTRENCLSIZE:TITLE:Part21Rept(50DKT)NOTES:RECIPIENTIDCODE/NAMEPD3-3PDINTERNA~:t:TERNRR/DRPECB/BRES/DET/EIBRGN2RGN4COPIESLTTRENCLRECIPIENTIDCODE/NAMESTANG,JNRR/DRPM/PECBPDRWARD,M.RGNlRGN3COPIESLTTRENCLEXTERNAL:INPORECORDCTRNRCPDRNOACSILVER,ENUDOCSFULLTXTDUNTHISDOCUMENTHASBEEN~Ca.tlP~gNOTETOALL"RIDS"RECIPIENTS:PLEASEHELPUSTOREDUCEWASTE.TOHAVEYOURNAMEORORGANIZATIONREMOVEDFROMDISTRIBUTIONLISTSORREDUCETHENUMBEROFCOPIESRECEIVEDBYYOUORYOURORGANIZATION,CONTACTTHEDOCUMENTCONTROLDESK(DCD)ONEXTENSION415-2083FULLTEXTCONVERSIONREQUIREDTOTALNUMBEROFCOPIESREQUIRED:LTTRENCL15 It ReportabilityRetluirementThisisMarkKellyfromAtnericanElectricPower,D.C.CookUnits1and2,callingwithaninitialNRCnotificationthateventnumber34427,previouslyrcpor(edbyD,C.CookonJune23,1998,hasbeendeterminedtoalsobcreportableunder10CFRPart21.IThecomponentsupplier(Westinghouse)hasbeenprovidedacopyofthisrcport.A'tten10CFRPart21reportwillbesubmittedbyAugust10,1998.,*THEFOLLOWINGWASREPORTEDONJUNE23,1998ASEVENT434427~~~BackgroundTheicecondenserconsistsof24buoys,eachofwhichcontain81icebasketsforatota1of1,944icebasketsperunit.Theicebasketsareapproximately48feethighand1footindiameter,andarerestrainedsothattheydonotejectduringdesignbasisaccidentblowdownforces.Thisrestraintisachievedbyau-boltarrangcmcntconnectedtoacrossbaronthebottomofthciccbasket.OnJanuary12,1998,anENScallwasmadebyD.C.Cooktorcportdamagetoicecondenserbaskets.MorcdetailonthcicecondenserdamagewasprovidedinLER'8-08-01.Today'srcportisrelatedtomanufacturingdefectsratherthandamage.EventDefectiveandmissingweldshaveb'eenfoundontheiccbasketbottomcrossbarandbottombasketgridsduringaninspectionoftheunit1icecondenser.A)thoughpreliminaryanalyseshaveindicatedthatthepresenceofdefectiveweldsonthebottomcrossbarmaybcacceptable,theaggregateeffectofmissinganddefectiveweldsonboththebottomcrossbarandbottomgridstructurehasbeendeterminedtoconstituteanunanalyzedcondition.Itisexpectedthatsimilarconditionswillbefoundintheunit2icccondensericebaskets.CorrectiveActionT'einvestigationofthisc'onditionisongoing.Thedefectiveicebasketbonon1rimswillbcreplacedorrepairedasappropriate.Awritten10CFRPart21updatewillbesubmittedwithin30days.9807i702879806238PDRADQCK050003l58PDR+TOTALP.81 POWER;REACTOREVENTNUMBER:34427FACILITY:COOKUNIT:[1][2][]RXTYPE:[1]W-4-LP,[2]W-'4-LPNRCNOTIFIEDBY:MARKKELLYHQOPSOFFICER:FANGIEJONESREGXON:3STATE:MINOTIFICATIONDATE:06/23/98NOTIFICATIONTIME:10:19[ET]EVENTDATE:06/23/98EVENTTIME:08:07[EDT]LASTUPDATEDATE:07/10/98NOTXFICATIONSEMERGENCYCLASS:NOTAPPLICABLE10CFRSECTION:ADAS50.72(b)(2)(i)DEG/UNANALYZEDCONDCCCC21.21UNSPECIFIEDPARAGRAPHMIKEJORDANVERNHODGERDOUNITNNNN0COLDSHUTDOWN0COLDSHUTDOWNSCRAMCODERZCRITINITPWRINITRXMODECURRPWRCURRRXMODE0COLDSHUTDOWN0COLDSHUTDOWNEVENTTEXTICECONDENSERBASKETSFOUNDINUNANALYZEDCONDITIONTHELICENSEEDISCOVEREDDURINGANINSPECTIONOFUNITONEICECONDENSER~MISSINGANDORDEFECTIVEWELDSONTHEBOTTOMCROSSBARANDBOTTOMBASKETGRIDSOFTHEXCECONDENSERBASKETS.THELICENSEEEXPECTSTOFINDSXMILARCONDITIONSINTHEUNITTWOICECONDENSER.THISCONDITIONISUNANALYZEDANDANINVESTIGATIONWILLCONTINUEINTOTHECAUSEOFTHESECONDITIONS.THECONDITIONISBEINGREVIEWEDFORREPORTABILITYUNDER10CFRPART21.THEDEFECTIVEICEBASKETBOTTOMRIMSWILLBEREPAIREDORREPLACEDASAPPROPRIATEBEFOREENTERINGPLANTSTARTUP.THELICENSEEINFORMEDTHENRCRESIDENTINSPECTOR.*)+*UPDATEON7/10/98e1704BYKELLYTOGOULD***THELICENSEEXSCONSIDERINGTHISCONDXTIONTOBEAPART21REPORTSINCETHEYDETERMINEDTHEREPORTEDICECONDENSERDAMAGE'XSMOREOFAMANUFACTURINGDEFECTTHANDAMAGE.ITISEXPECTEDTHATSIMILARCONDITIONSWILLBEFOUNDONUNIT2.THERESIDENTINSPECTORWASINFORMED.THEREG3RDO(GARDNER)WASNOTIFIED.VERNHODGE(NRR)WASNOTIFIED.

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