ML17332A823
| ML17332A823 | |
| Person / Time | |
|---|---|
| Site: | Cook  |
| Issue date: | 06/26/1995 |
| From: | FITZPATRICK E INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| AEP:NRC:00106B, AEP:NRC:106B, NUDOCS 9507030124 | |
| Download: ML17332A823 (5) | |
Text
PRIORZTY1(ACCELERATEDRZDSPROCESSING)REGULATORYINFORMATIONDISTRIBUTIONSYSTEM(RIDS)ACCESSIONNBR:9507030124DOC.DATE:95/06/26NOTARIZED:NODOCKETFACIL:50-315DonaldC.CookNuclearPowerPlant,Unit1,IndianaM05000315P'0-316DonaldC.CookNuclearPowerPlant,Unit2,IndianaM05000316AUTH.NAMEAUTHORAFFILIATIONFITZPATRICK,E.IndianaMichiganPowerCo.(formerlyIndiana&MichiganEleRECIP.NAMERECIPIENTAFFILIATIONDocumentControlBranch(DocumentControlDesk)I
SUBJECT:
Advisesthatsafetyreviewofproposedcancellationofcommitmentreblockedalarmsconcludedthat,cancellationwouldbebeneficial:&prudent&thereforejustified.DISTRIBUTIONCODE:AOOIDCOPIESRECEIVED:LTRJENCL.~SIZE:TITLE:ORSubmittal:GeneralDistributionNOTES:RECIPIENTIDCODE/NAMEPD3-1LAHICKMAN,JINTERNAL:~P~~E~R01HRR/DRCH/HICBNRR/DSSA/SRXBOGC/HDS2IEXTERNAL:NOACCOPIESLTTRENCL111.1RECIPIENTIDCODE/NAMEPD3-1PDNRR/DE/EMCBNRR/DSSA/SPLBNUDOCS-ABSTRACTNRCPDRCOPIESLTTRENCLY,DNNOTETOALL"RIDS"RECIPZENTS:PLEASEHELPUSTOREDUCEWASTE!CONTACTTHEDOCUMENTCONTROLDESK,ROOMOWFNSD8(415-2083)TOELIMINATEYOURNAMEFROMDISTRIBUTIONLISTSFORDOCUMENTSYOUDON'TNEED!c3TOTALNUMBEROFCOPIESREQUIRED:LTTR12ENCL S\I~550P4i'ItIUl IndianaMichiganPowerCompanyP.O.Box16631Coiumbus,OH43216June26,1995AEP'NRC:00106BDocketNos.50-31550-316U.S.NuclearRegulatoryCommissionATTN:DocumentControlDeskWashington,D.C.20555Gentlemen:DonaldC.CookNuclearPlantUnits1and2NOTIFICATIONOFCANCELLEDCOMMITMENTONBLOCKINGALARMSThislettersupersedesletterAEP:NRC:00106A,datedJune12,1995,whichwasanearlierversionoftheletterstoredinthecomputer,printed,andmailedinerror.Itisworthnotingthatneithertheinitialconditionsnortheendpointincludedinthesuperseded00106Aarealteredbythisrevisedsubmittal.Weregretanyinconveniencethiserrormaycause.Duringreviewofaproposedchangetoaplantprocedureregardingactionstobetakeninresponsetoblockedcontrolroomalarms,acommitmentmadetotheNRCseventeenyearsagowasuncovered.Ourevaluationfoundthat,whilethecommitmenthadbeensatisfiedintheplantproceduresatthattime,thecurrentprocedurerevisionwasnotinfull,literalcompliancewiththeoriginalcommitment.Actualcurrentplantpracticewas,however,consideredtobeequivalentorsuperiortotheintentofthecommitment.Thepurposeofthisletter,therefore,istoinformyouofourplantocancelthepreviouscommitment.Specifically,thepreviouscommitmentwasmadeinresponsetoaNoticeofViolationfromIEInspectionReportsNo.50-315/78-27and50-316/78-31.Inthosereports,afindingidentifiedthatthelowtemperaturealarminthecontrolroomfortheUnit2RWSTwasblockedwithoutbeingapprovedorlogged.AEPSCrespondedtothisNoticeofViolationonDecember21,1978,inletterAEP:NRC:00106.TheinitialcorrectiveactionincludedaproceduralrequirementthattheUnitSupervisor,whoisinchargeoftheControlRoom,removeallblockedalarmspriortoturningovertotherelievingshift.Thepracticeinrecentyearshasbeentorequiremorethoroughtechnicalreviewanddocumentationforblockedalarms.Thetechnicalreviewsareindependentlyverifiedaspartofthedocumentationprocess.Thenumberofproblemalarmsisalso9507030124950b2bPDRADOCK05000315PPDR U.S.NuclearRegulatoryCommissionPage2AEP:NRC:00106BfollowedbyplantmanagementandbyAEPSCrepresentativesinamorningstatusmeeting.Inaddition,the1995AEPNOProductionWorkPlan-PerformanceStandardsspecifythathighprioritystandingannunciatorsbeclearedwithin14daysduringoperation,andwithin14daysofparallelfollowingoutages.Theincreasedattentionbymanagement,aswellasbythesystemengineersatCookNuclearPlant,andthe"fulldeck"equipmentoperatingphilosophy,hasgenerallyresultedinfewerblockedalarms,forshorterperiods,thanexistedatthetimetheoriginalcommitmentwasmadein1978.Theoverallmanagementofalarmshassignificantlyimproved,withoutdependenceonthecommitmentthatwillbecancelled.BothCookNuclearPlantunitcontrolroomsoperatedwithoutasingleannunciatorlitonApril16,1995.Thisisthefirsttimethatthisperformancemeasurewasachievedintheoperatinghistoryoftheplant.Reachingthisoperatingrecordisevidenceoftheeffectivenessofourpoliciesonannunciatoralarmsandunderlyingdesign,engineering,andmaintenanceissues.ThecommitmentwemadeinAEP:NRC:00106,datedDecember21,1978,concerningblockedalarmsisnotneededandcanbecancelled.Underourcurrentpractice,theUnitSupervisorreviewsalistofthecurrentlyblockedalarmspriortocomingondutyeachshift.Technicalreviewsarealsoperformedwhenanalarmisblocked,underourcurrentpractice.Regularoversightofblockedalarmsbymanagementandsystemengineersprovidesadditionalassuranceofsafeoperation.InaccordancewithourproceduresandNRCregulations,asafetyreviewwascompletedfortheproposedcancellationofthiscommitment.Thissafetyreviewconcludedthatthechangewouldbebeneficialandprudentandwouldhavenodeleteriouseffectonthehealthandsafetyofthepublic.Therefore,basedupontheabovereview,webelievethatthereistechnicaljustificationtosupportcancellationofthecurrentcommitment.
U.S.NuclearRegulatoryCommissionPage3AEP'NRC'00106BAsaresultofourreview,webelievethatthecancellationofthecommitmentwillresultincontinuedeffectivecontrolofblockedalarms.Sincerely,E.E.FitzpatrickVicePresidentcadCC:A.A.BlindG.CharnoffJ.B.Martin-RegionIIINFEMSectionChiefNRCResidentInspectorJ.R.Padgett