ML17325B464

Withdraws Response to Issue 1 of NRC Cal,Dtd 970919. Comprehensive Design Review Effort in Progress to Validate Resolution of Issue for Future Operation

ML17325B464
Person / Time
Site:	Cook
Issue date:	03/17/1999
From:	RENCHECK M W INDIANA MICHIGAN POWER CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
AEP:NRC:-1260GQ, NUDOCS 9903240377
Download: ML17325B464 (6)

Text

CgCATEGORY1.REGULATEINFORMATION DISTRIBUTION SYSTEM(RIDS)ACCESSION NBR:9903240377

'OC.DATE:

99/03/17NOTARIZED:

NOFACIL:50-315 DonaldC.CookNuclearPowerPlant,Unit1,IndianaM50-.316DonaldC.CookNuclearPowerPlant,Unit2,Indiana'AUTH.NAMEAUTHORAFFILIATION RENCHECK,M.W.

IndianaMichiganPowerCo.RECIP.NAME RECIPIENT"AFFILIATION RecordsManagement Branch(Document ControlDesk)DOCKET0500031505000316

SUBJECT:

Withdraws responsetoissue1ofNRCCAL,dtd970919.Comprehensive designrevieweffortinprogresstovalidateresolution ofissueforfutureoperation.

DISTRIBUTION CODEIE36DCOPIESRECEIVED:LTR LENCLDSIZE:TITLE:Immediate/Confirmatory ActionLtr(50Dkt-Other ThanEmergency NOTES:PreparRECIPIENT IDCODE/NAME PDXNTERNA.FILRES/DET/EIB EXTERNAL:

NOACPMNRR/DRPM/PECB NRCPDRCOPIESRECIPIENT LTTREfCLIDCODE/NAME 1COPIESLTTRECLDNNOTETOALLNRZDSNRECIPIENTS PLEASEHELPUSTOREDUCEWASTE.TOHAVEYOURNAMEORORGANIZATION REMOVEDFROMDISTRIBUTION LISTSORREDUCETHENUMBEROFCOPIESRECEIVEDBYYOUORYOURORGANZZATIONiCONTACTTHEDOCUMENTCONTROLDESK(DCD)ONEXTENSION 415-2083TOTALNUMBEROFCOPIESREQUIRED:

LTTR7ENCL IndianaMichigan~PowerCompany500CircleDriveBuchanan, Ml491071373 INQIANAMICHIGANFOWMMarch17,1999AEP:NRC:1260GQDocketNos:50-31550-316U.S.NuclearRegulatory Commission ATTN:DocumentControlDeskMailStop0-Pl-17Washington, DC20555-0001 DonaldC.CookNuclearPlantUnits1&2WITHDRAWAL OFRESPONSETOISSUENO.1OFTHENRCCONFIRMATORY ACTIONLETTEROFSEPTEMBER 19'997~RIII97011

Reference:

AEP:NRC:1260G3, ResponsetoConfirmatory ActionLetterdatedDecember2,1997IndianaandMichiganPowerCompany(I&M)providedourresponses tothesubjectNRCConfirmatory ActionLetter(CAL)asdelineated inthereference.

Ina'ecentreviewassociated withourrestartefforts,I&Midentified potential non-conservatisms relatedtotheassumptions usedinourpreviouscontainment sumpanalysisprovidedinresponsetoCALIssue1inAttachment 2tothereference letter.Adjusting

'theseearlierassumptions producedlowerpredicted icemeltrates,whichcouldpotentially resultinpredicted sumplevelsbelowthedesignbasisminimumlevelforcertainsmall-break LOCAcases.Therefore, I&Mwithdraws ourresponsetoCALIssueNo.l.Inordertoaddressthecontainment sumpinventory issue,acomprehensive designrevieweffortisinprogresstovalidateresolution ofthisissueforfutureoperation.

Thisdesignreviewwillensureresolution ofthesumpissueaspartoftherestartplan.Additionally, I&Mwillreviewourresponses totheCALlettertoensuretheyremain'valid inconsideration offindingsthatmayemergefromthe'Expanded SystemReadiness Reviews.'903240377 9903i7PORAOOCKOS0003LSPDR.~gQ3 p4U.S.NuclearRegulatory Commission Page2IAEP:NRC:1260GQ Ifyouhaveanyquestions orwishtodiscussthismatterfurtherpleasecontactDavidF.Kunsemiller at616-466-2405.

Sincerely, MichaelW.RencheckVicePresident

-NuclearEngineering cJ.A.AbramsonA.C.Bakken,"J.E.Dyer,MDBQ-DW&RPDNRCResident1nspector,

',

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~+(g>~~rr~U.S.NuclearRegulatory Commission Page3AEP:NRC:1260GQbc:T.P.BeilmanJ.M.Chamberlain J.J.EutoFOLIOB.J.HickleG.HonmaD.F.Kunsemiller/G.

P.Arent/M.J.GumnsM.W.Rencheck/E.

R.Eckstein/D.

J.GarnerJ.F.Stang,Jr.,NRCWashington, DC

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