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{{#Wiki_filter:CATEGORY1REGULATOROINFORMATZONDISTRIBUTIONTEM(RIDE)ACCESSIONNBR:9612270111DOC.DATE:96/12/20NOTARIZED:YESFACIL:50-315DonaldC.CookNuclearPowerPlant,Unit1,IndianaM50-316DonaldC.CookNuclearPowerPlant,Unit2,IndianaMAUTH.NAMEAUTHORAFFILIATIONFITZPATRICK,E.EAmericanElectricPowerCo.,Inc.RECIP.NAMERECIPIENTAFFILIATIONDocumentControlBranch(DocumentControlDesk)
{{#Wiki_filter:CATEGORY1REGULATOROINFORMATZON DISTRIBUTION TEM(RIDE)ACCESSION NBR:9612270111 DOC.DATE:
96/12/20NOTARIZED:
YESFACIL:50-315 DonaldC.CookNuclearPowerPlant,Unit1,IndianaM50-316DonaldC.CookNuclearPowerPlant,Unit2,IndianaMAUTH.NAMEAUTHORAFFILIATION FITZPATRICK,E.E AmericanElectricPowerCo.,Inc.RECIP.NAME RECIPIENT AFFILIATION DocumentControlBranch(Document ControlDesk)


==SUBJECT:==
==SUBJECT:==
ApplicationforamendstolicensesDPR-58!'PR-74,requestingrevofreactorcoolantpumpflywheelinspfrequency.DISTRIBUTIONCODE:AOOZDCOPIESRECEIVED:LTR1ENCLiSIZE:4I4TITLE:ORSubmittal:GeneralDistributionNOTES:DOCKET0500031505000316ERECIPIENTIDCODE/NAMEPD3-3LAHICKMAN,JINTERNA:MLECENTE0.RDEEMCBNRR/DSSA/SPLBNUDOCS-ABSTRACTEXTERNAL:NOACCOPIESLTTRENCL111111111111RECIPIENTIDCODE/NAMEPD3-3PDNRR/DE/ECGB/ANRR/DRCH/HICBNRR/DSSA/SRXBOGC/HDS2NRCPDRCOPIESLTTRENCL111111111011DUNNOTETOALL"RIDS"RECIPIENTS:PLEASEHELPUSTOREDUCEWASTE!CONTACTTHEDOCUMENTCONTROLDESK,ROOMOWFN5D-5(EXT.415-2083)TOELIMINATEYOURNAMEFROMDISTRIBUTIONLISTSFORDOCUMENTSYOUDON'TNEED!TOTALNUMBEROFCOPIESREQUIRED:LTTR13ENCL.'12 IndianaMichiganPowerCompany500CircleDriveBuchanan,Ml491071395INQMNANICNESANPQWMDecember20,1996DocketNo:50-31550-316AEP:NRC:124510CFR50.90U.S.NuclearRegulatoryCommissionDocumentControlDeskWashington,D.C.20555Gentlemen:DonaldC.CookNuclearPlantUnits1and2LICENSENOS.DPR-58ANDDPR"74PROPOSEDLICENSEANDTECHNICALSPECIFICATIONCHANGESOFREACTORCOOLANTPUMPFLYWHEELINSPECTIONFREQUENCYThisletteranditsattachmentsconstituteanapplicationforamendmentofthetechnicalspecifications(T/S)forCookNuclearPlantunits1and2.Changesareproposedtoreducethefrequencyandscopeofreactorcoolantpumpflywheelinspectionsconsistentwithyourstaff'sevaluationofWCAP-14535,"TopicalReportonReactorCoolantPumpFlywheelInspectionElimination."Adescriptionoftheproposedchangesandananalysisconcerningsignificanthazardsconsiderationpursuantto10CFR50.92iscontainedinattachment1.Attachment2containstheexistingT/Spagesmarkedtoreflecttheproposedchanges.Attachment.3containstheproposed,revisedT/Spages.WebelievetheproposedT/Schangeswillnotresultinasignificantchangeinthetypesofeffluentsorasignificantincreaseintheamountofeffluentthatmightbereleasedoffsite,orasignificantincreaseinindividualorcumulativeoccupationalradiationexposure.TheseproposedchangeshavebeenreviewedbythePlantNuclearSafetyReviewCommitteeandtheNuclearSafetyandDesignReviewCommittee~.Incompliancewiththerequirementsof10CFR50.91(b)(1),copiesofthisletteranditsattachmentshavebeentransmittedtotheMichiganPublicServiceCommissionandtheMichiganDepartment.ofPublicHealth.Sincerely,SWORNTOANDSUBSCRIBEDBEFOREMEITHIS~ODAYOF~~Mt1996E.E.Fitpatrick96OO3VicePresidentAttachmentsNotaryPublicMyCommissionExpires:JANWATSONNOTARYPUBUC,BERRIENCOUNTY,MIIMYCOMMISSIONEXPIRESFEB101999'Pbi2270iii9hi220PDRADQCK050003l5PPDR J1';C.1Wtq'ae4~Ia,<<W*<<i~u~""C U.S.NuclearRegulatoryCommissionPage2AEP:NRC:1245cc:A.A.BlindA.B.BeachMDEQ"DWEcRPDNRCResidentInspectorJ.R.Padgett ATTACHMENT1TOAEP:NRC:124S10CFR50.92ANALYSISFORCHANGESTOTHEDONALDC.COOKNUCLEARPLANTUNITS1AND2TECHNICALSPECIFICATIONS Attachment1toAEP:NRC:1245Page11.0SECTIONTOBECHANGED1.Unit1technicalspecification(T/S)4.4.10.12.Unit2T/S4.4.10.12.0EXTENTOFCHANGES1.Weareproposingtochangeunit1T/S4.4.10.1torequirereactorcoolantpump(RCP)flywheelinspectionsonceevery10yearsinthemannerdescribedbelow.Weareproposingtochangeunit2T/S4.4.10.1torequireRCPflywheelinspectionsonceevery10yearsinthemannerdescribedbelow.3.0CHANGESREUESTEDWeareproposingtomakethefollowingchangetotheunit1andunit2T/Ss.CurrentlyT/Ssection4.4.10.1requiresthateachreactorcoolantpumpflywheelbeinspectedpertherecommendationsofregulatorypositionC.4.bofRegulatoryGuide(RG)1.14,Revision1,August1975.TheregulatorypositionofRG1.14concerningISIcallsforanin-placeultrasonicvolumetricexaminationoftheareasofhigherstressconcentrationattheboreandkeywayatapproximately3-yearintervalsandasurfaceexaminationofallexposedsurfacesandcompleteultrasonicvolumetricexaminationatapproximately10-yearintervals.TheproposedT/Srequiresthateitheraqualifiedin-placeUTexaminationoverthevolumefromtheinnerboreoftheflywheeltothecircleofone-halftheouterradiusorasurfaceexamination(MTand/orPT)ofexposedsurfacesdefinedbythevolumeofthedisassembledflywheelsbeconductedonceevery10years.4.0DISCUSSIONTechnicalSecification4.4.10.1BasesT/S4.4.10.1ensuresthatthestructuralintegrityofthereactorcoolantpumpflywheelswillbemaintainedatanacceptablelevelthroughoutthelifeoftheplant.JustificationforProosedTechnicalSecificationChanesTheproposedT/SamendmentrequesttoreducethefrequencyandscopeofsurveillanceoftheRCPflywheelsisjustifiedforseveralreasons.ThischangeisconsistentwithMr.Sheron's(DirectorDivisionofEngineering,OfficeofNuclearReactorRegulation)letterentitled"AcceptanceforReferencingofTopicalReportWCAP-14535,'TopicalReportonReactorCoolantPumpFlywheelInspectionElimination'andrelatedattachments.Pertherequirementofthisletter,wehaveconfirmedthattheRCPflywheelsinplaceatCookNuclearPlantarecomposedofSA533Bmaterial.ThoughWestinghouseElectricCorporationreportWCAP-14535,entitled"TopicalReportonReactorCoolantPumpFlywheelInspectionElimination",seekseliminationofflywheelinspections,weonly Attachment1toAEP:NRC:1245Page2seektoreducethefrequencyoftheseinspectionstoonceevery10years.WCAP-14535-concludesthefollowing.1.Flywheelsarecarefullydesignedandmanufacturedfromexcellentqualitysteel,whichhasahighfracturetoughness.2.Flywheeloverspeedisthecriticalloading,butleakbeforebreakhaslimitedthemaximumspeedtolessthan1500rpm.6.7.Flywheelinspectionshavebeenperformedfor2Cyears,withnoindicationsofserviceinducedflaws.Flywheelintegrityevaluationsshowveryhighflawtolerancefortheflywheels.Crackextensionovera60yearservicelifeisnegligible.Structuralreliabilitystudieshaveshownthateliminatinginspectionsafter10yearsofplantlifewillnotsignificantlychangetheprobabilityoffailure.Mostflawswhichcouldleadtofailurewouldbedetectedduringpreserviceinspectionoratworstearlyinplantlife,andcrackgrowthoverplantlifeisnegligible.AsstatedintheSERassociatedwithWCAP-14535,assuminganinitialcrackof10%ofthedistancefromthekeywaytotheflywheelouterradiusandamaximumfatiguecrackgrowth,ASMEmarginswouldbemaintainedduringthe10-yearinspectionperiod.Inspectionsresultinmanremexposureandthepotentialforflywheeldamageduringdisassemblyandreassembly.Basedontheaboveconclusions,inspectionsofRCPflywheelswitha10-yearfrequencyandmodifiedscopearejustified.5.0NOSIGNIFICANTHAZARDSCONSIDERATIONWehaveevaluatedtheproposedT/Schangesandhavedeterminedthey'onotrepresentasignificanthazardsconsiderationbasedonthecriteriaestablishedin10CFR50.92(c).OperationofCookNuclearPlantinaccordancewiththeproposedamendmentwillnot:1.InvolveasinificantincreaseintherobabilitorconseenceofanaccidentreviouslevaluatedThischangewillreducetnefrequencyandscopeofthesurveillancetestingonthereactorcoolantpumpflywheels.Operatingpowerplantshavebeeninspectingtheirflywheelsforover20yearswithnoflawsidentifiedwhichaffectflywheelintegrity.PastexaminationsperformedtosatisfyT/S4.4.10.1havenotrevealedanycrackingofflywheelplatesatCookNuclearPlant.Crackextensionovera60yearservicelifeisnegligible.Structuralreliabilitystudieshaveshownthateliminatinginspectionsafter10yearsofplantlifewillnotsignificantlychange'heprobabilityoffailure.Mostflawswhichcouldleadto Attachment1toAEP:NRC:1245Page3failurewouldbedetectedduringpreserviceinspectionor,atworst,earlyinplantlife,andcrackgrowthoverplantlifeisnegligible.AsstatedintheSERassociatedwithWCAP-14535,assuminganinitialcrackof10%ofthedistancefromthekeywaytotheflywheelouterradiusandamaximumfatiguecrackgrowth,ASMEmarginswouldbemaintainedduringthe10-yearinspectionperiod.Therefore,thechangeintestfrequencywillnotendangerpublichealthorsafety.Forthesereasons,itisourbelieftheproposedchangesdonotinvolveasignificantincreaseintheprobabilityorconsequencesofapreviouslyevaluatedaccident.Createtheossibilitofanewordifferentkindofaccidentfromanaccidentreviouslevaluated.Thechangeswillnotintroduceanynewmodesofplantoperation,norwillanyphysicalchangestotheplantberequired.Thus,thechangeswillnotcreatethepossibilityofanewordifferentkindofaccidentfromanyaccidentpreviouslyanalyzedorevaluated.3.InvolveasinificantreductioninamarinofaafetThischangewillreducethefrequencyandscopeofthesurveillancetestingonthereactorcoolantpumpflywheels.Operatingpowerplantshavebeeninspectingtheirflywheelsforover20yearswithnoflawsidentifiedwhichaffectflywheelintegrity.PastexaminationsperformedtosatisfyT/S4.4.10.1havenotrevealedanycrackingofflywheelplatesatCookNuclearPlant.Crackextensionovera60yearservicelifeisnegligible.Structuralreliabilitystudieshaveshownthateliminatinginspectionsafter10yearsofplantlifewillnotsignificantlychangetheprobabilityoffailure.Mostflawswhichcouldleadtofailurewouldbedetectedduringpreserviceirepectionoratw'orstearlyinplantlife,andcrackgr.~thoverplantlifeisnegligible.AsstatedintheSERassociatedwithWCAP-,14535,assuminganinitialcrackof10%ofthedistancef'romthekeywaytotheflywheelouterradiusandamaximumfatiguecrackgiowth,ASMEmarginswouldbemaintainedduringthe10-yearinspectionperiod.Forthesereasons,itisourbelieftheproposedchangesdonotinvolveasignificantreductioninamarginofsafety.6.0PENDINGTSPROPOSALSIMPACTINGTHISSUBMITTALTherearenootherT/Sproposalsunderreviewthatimpactthissubmittal~.}}
Application foramendstolicensesDPR-58!'PR-74,requesting revofreactorcoolantpumpflywheelinspfrequency.
DISTRIBUTION CODE:AOOZDCOPIESRECEIVED:LTR 1ENCLiSIZE:4I4TITLE:ORSubmittal:
GeneralDistribution NOTES:DOCKET0500031505000316ERECIPIENT IDCODE/NAME PD3-3LAHICKMAN,J INTERNA:MLECENTE0.RDEEMCBNRR/DSSA/SPLB NUDOCS-ABSTRACT EXTERNAL:
NOACCOPIESLTTRENCL111111111111RECIPIENT IDCODE/NAME PD3-3PDNRR/DE/ECGB/A NRR/DRCH/HICB NRR/DSSA/SRXB OGC/HDS2NRCPDRCOPIESLTTRENCL111111111011DUNNOTETOALL"RIDS"RECIPIENTS:
PLEASEHELPUSTOREDUCEWASTE!CONTACTTHEDOCUMENTCONTROLDESK,ROOMOWFN5D-5(EXT.
415-2083)
TOELIMINATE YOURNAMEFROMDISTRIBUTION LISTSFORDOCUMENTS YOUDON'TNEED!TOTALNUMBEROFCOPIESREQUIRED:
LTTR13ENCL.'12 IndianaMichiganPowerCompany500CircleDriveBuchanan, Ml491071395 INQMNANICNESANPQWMDecember20,1996DocketNo:50-31550-316AEP:NRC:1245 10CFR50.90U.S.NuclearRegulatory Commission DocumentControlDeskWashington, D.C.20555Gentlemen:
DonaldC.CookNuclearPlantUnits1and2LICENSENOS.DPR-58ANDDPR"74PROPOSEDLICENSEANDTECHNICAL SPECIFICATION CHANGESOFREACTORCOOLANTPUMPFLYWHEELINSPECTION FREQUENCY Thisletteranditsattachments constitute anapplication foramendment ofthetechnical specifications (T/S)forCookNuclearPlantunits1and2.Changesareproposedtoreducethefrequency andscopeofreactorcoolantpumpflywheelinspections consistent withyourstaff'sevaluation ofWCAP-14535, "TopicalReportonReactorCoolantPumpFlywheelInspection Elimination."
Adescription oftheproposedchangesandananalysisconcerning significant hazardsconsideration pursuantto10CFR50.92iscontained inattachment 1.Attachment 2containstheexistingT/Spagesmarkedtoreflecttheproposedchanges.Attachment
.3containstheproposed, revisedT/Spages.WebelievetheproposedT/Schangeswillnotresultinasignificant changeinthetypesofeffluents orasignificant increaseintheamountofeffluentthatmightbereleasedoffsite,orasignificant increaseinindividual orcumulative occupational radiation exposure.
TheseproposedchangeshavebeenreviewedbythePlantNuclearSafetyReviewCommittee andtheNuclearSafetyandDesignReviewCommittee~
.Incompliance withtherequirements of10CFR50.91(b)(1),
copiesofthisletteranditsattachments havebeentransmitted totheMichiganPublicServiceCommission andtheMichiganDepartment.
ofPublicHealth.Sincerely, SWORNTOANDSUBSCRIBED BEFOREMEITHIS~ODAYOF~~Mt1996E.E.Fitpatrick96OO3VicePresident Attachments NotaryPublicMyCommission Expires:JANWATSONNOTARYPUBUC,BERRIENCOUNTY,MIIMYCOMMISSION EXPIRESFEB101999'Pbi2270iii 9hi220PDRADQCK050003l5PPDR J1';C.1Wtq'ae4~Ia,<<W*<<i~u~""C U.S.NuclearRegulatory Commission Page2AEP:NRC:1245cc:A.A.BlindA.B.BeachMDEQ"DWEcRPDNRCResidentInspector J.R.Padgett ATTACHMENT 1TOAEP:NRC:124S 10CFR50.92ANALYSISFORCHANGESTOTHEDONALDC.COOKNUCLEARPLANTUNITS1AND2TECHNICAL SPECIFICATIONS Attachment 1toAEP:NRC:1245 Page11.0SECTIONTOBECHANGED1.Unit1technical specification (T/S)4.4.10.12.Unit2T/S4.4.10.12.0EXTENTOFCHANGES1.Weareproposing tochangeunit1T/S4.4.10.1torequirereactorcoolantpump(RCP)flywheelinspections onceevery10yearsinthemannerdescribed below.Weareproposing tochangeunit2T/S4.4.10.1torequireRCPflywheelinspections onceevery10yearsinthemannerdescribed below.3.0CHANGESREUESTEDWeareproposing tomakethefollowing changetotheunit1andunit2T/Ss.Currently T/Ssection4.4.10.1requiresthateachreactorcoolantpumpflywheelbeinspected pertherecommendations ofregulatory positionC.4.bofRegulatory Guide(RG)1.14,Revision1,August1975.Theregulatory positionofRG1.14concerning ISIcallsforanin-placeultrasonic volumetric examination oftheareasofhigherstressconcentration attheboreandkeywayatapproximately 3-yearintervals andasurfaceexamination ofallexposedsurfacesandcompleteultrasonic volumetric examination atapproximately 10-yearintervals.
TheproposedT/Srequiresthateitheraqualified in-placeUTexamination overthevolumefromtheinnerboreoftheflywheeltothecircleofone-halftheouterradiusorasurfaceexamination (MTand/orPT)ofexposedsurfacesdefinedbythevolumeofthedisassembled flywheels beconducted onceevery10years.4.0DISCUSSION Technical Secification 4.4.10.1BasesT/S4.4.10.1ensuresthatthestructural integrity ofthereactorcoolantpumpflywheels willbemaintained atanacceptable levelthroughout thelifeoftheplant.Justification forProosedTechnical Secification ChanesTheproposedT/Samendment requesttoreducethefrequency andscopeofsurveillance oftheRCPflywheels isjustified forseveralreasons.Thischangeisconsistent withMr.Sheron's(Director DivisionofEngineering, OfficeofNuclearReactorRegulation) letterentitled"Acceptance forReferencing ofTopicalReportWCAP-14535,'TopicalReportonReactorCoolantPumpFlywheelInspection Elimination' andrelatedattachments.
Pertherequirement ofthisletter,wehaveconfirmed thattheRCPflywheels inplaceatCookNuclearPlantarecomposedofSA533Bmaterial.
ThoughWestinghouse ElectricCorporation reportWCAP-14535, entitled"TopicalReportonReactorCoolantPumpFlywheelInspection Elimination",
seekselimination offlywheelinspections, weonly Attachment 1toAEP:NRC:1245 Page2seektoreducethefrequency oftheseinspections toonceevery10years.WCAP-14535-concludes thefollowing.
1.Flywheels arecarefully designedandmanufactured fromexcellent qualitysteel,whichhasahighfracturetoughness.
2.Flywheeloverspeed isthecriticalloading,butleakbeforebreakhaslimitedthemaximumspeedtolessthan1500rpm.6.7.Flywheelinspections havebeenperformed for2Cyears,withnoindications ofserviceinducedflaws.Flywheelintegrity evaluations showveryhighflawtolerance fortheflywheels.
Crackextension overa60yearservicelifeisnegligible.
Structural reliability studieshaveshownthateliminating inspections after10yearsofplantlife willnotsignificantly changetheprobability offailure.Mostflawswhichcouldleadtofailurewouldbedetectedduringpreservice inspection oratworstearlyinplantlife,andcrackgrowthoverplantlifeisnegligible.
AsstatedintheSERassociated withWCAP-14535, assuminganinitialcrackof10%ofthedistancefromthekeywaytotheflywheelouterradiusandamaximumfatiguecrackgrowth,ASMEmarginswouldbemaintained duringthe10-yearinspection period.Inspections resultinmanremexposureandthepotential forflywheeldamageduringdisassembly andreassembly.
Basedontheaboveconclusions, inspections ofRCPflywheels witha10-yearfrequency andmodifiedscopearejustified.
 
==5.0 NOSIGNIFICANT==
HAZARDSCONSIDERATION Wehaveevaluated theproposedT/Schangesandhavedetermined they'onotrepresent asignificant hazardsconsideration basedonthecriteriaestablished in10CFR50.92(c).Operation ofCookNuclearPlantinaccordance withtheproposedamendment willnot:1.Involveasinificantincreaseintherobabilit orconseenceofanaccidentreviouslevaluated Thischangewillreducetnefrequency andscopeofthesurveillance testingonthereactorcoolantpumpflywheels.
Operating powerplantshavebeeninspecting theirflywheels forover20yearswithnoflawsidentified whichaffectflywheelintegrity.
Pastexaminations performed tosatisfyT/S4.4.10.1havenotrevealedanycrackingofflywheelplatesatCookNuclearPlant.Crackextension overa60yearservicelifeisnegligible.
Structural reliability studieshaveshownthateliminating inspections after10yearsofplantlifewillnotsignificantly change'he probability offailure.Mostflawswhichcouldleadto Attachment 1toAEP:NRC:1245 Page3failurewouldbedetectedduringpreservice inspection or,atworst,earlyinplantlife,andcrackgrowthoverplantlifeisnegligible.
AsstatedintheSERassociated withWCAP-14535, assuminganinitialcrackof10%ofthedistancefromthekeywaytotheflywheelouterradiusandamaximumfatiguecrackgrowth,ASMEmarginswouldbemaintained duringthe10-yearinspection period.Therefore, thechangeintestfrequency willnotendangerpublichealthorsafety.Forthesereasons,itisourbelieftheproposedchangesdonotinvolveasignificant increaseintheprobability orconsequences ofapreviously evaluated accident.
Createtheossibilit ofanewordifferent kindofaccidentfromanaccidentreviouslevaluated.
Thechangeswillnotintroduce anynewmodesofplantoperation, norwillanyphysicalchangestotheplantberequired.
Thus,thechangeswillnotcreatethepossibility ofanewordifferent kindofaccidentfromanyaccidentpreviously analyzedorevaluated.
3.Involveasinificantreduction inamarinofaafetThischangewillreducethefrequency andscopeofthesurveillance testingonthereactorcoolantpumpflywheels.
Operating powerplantshavebeeninspecting theirflywheels forover20yearswithnoflawsidentified whichaffectflywheelintegrity.
Pastexaminations performed tosatisfyT/S4.4.10.1havenotrevealedanycrackingofflywheelplatesatCookNuclearPlant.Crackextension overa60yearservicelifeisnegligible.
Structural reliability studieshaveshownthateliminating inspections after10yearsofplantlifewillnotsignificantly changetheprobability offailure.Mostflawswhichcouldleadtofailurewouldbedetectedduringpreservice irepection oratw'orstearlyinplantlife,andcrackgr.~thoverplantlifeisnegligible.
AsstatedintheSERassociated withWCAP-,14535,assuminganinitialcrackof10%ofthedistancef'romthekeywaytotheflywheelouterradiusandamaximumfatiguecrackgiowth,ASMEmarginswouldbemaintained duringthe10-yearinspection period.Forthesereasons,itisourbelieftheproposedchangesdonotinvolveasignificant reduction inamarginofsafety.6.0PENDINGTSPROPOSALS IMPACTING THISSUBMITTAL TherearenootherT/Sproposals underreviewthatimpactthissubmittal~
.}}

Revision as of 07:50, 29 June 2018

Application for Amends to Licenses DPR-58 & DPR-74, Requesting Rev of Reactor Coolant Pump Flywheel Insp Frequency
ML17333A712
Person / Time
Site: Cook  American Electric Power icon.png
Issue date: 12/20/1996
From: FITZPATRICK E
AMERICAN ELECTRIC POWER CO., INC.
To:
NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML17333A714 List:
References
AEP:NRC:1245, NUDOCS 9612270111
Download: ML17333A712 (8)
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Text

CATEGORY1REGULATOROINFORMATZON DISTRIBUTION TEM(RIDE)ACCESSION NBR:9612270111 DOC.DATE:

96/12/20NOTARIZED:

YESFACIL:50-315 DonaldC.CookNuclearPowerPlant,Unit1,IndianaM50-316DonaldC.CookNuclearPowerPlant,Unit2,IndianaMAUTH.NAMEAUTHORAFFILIATION FITZPATRICK,E.E AmericanElectricPowerCo.,Inc.RECIP.NAME RECIPIENT AFFILIATION DocumentControlBranch(Document ControlDesk)

SUBJECT:

Application foramendstolicensesDPR-58!'PR-74,requesting revofreactorcoolantpumpflywheelinspfrequency.

DISTRIBUTION CODE:AOOZDCOPIESRECEIVED:LTR 1ENCLiSIZE:4I4TITLE:ORSubmittal:

GeneralDistribution NOTES:DOCKET0500031505000316ERECIPIENT IDCODE/NAME PD3-3LAHICKMAN,J INTERNA:MLECENTE0.RDEEMCBNRR/DSSA/SPLB NUDOCS-ABSTRACT EXTERNAL:

NOACCOPIESLTTRENCL111111111111RECIPIENT IDCODE/NAME PD3-3PDNRR/DE/ECGB/A NRR/DRCH/HICB NRR/DSSA/SRXB OGC/HDS2NRCPDRCOPIESLTTRENCL111111111011DUNNOTETOALL"RIDS"RECIPIENTS:

PLEASEHELPUSTOREDUCEWASTE!CONTACTTHEDOCUMENTCONTROLDESK,ROOMOWFN5D-5(EXT.

415-2083)

TOELIMINATE YOURNAMEFROMDISTRIBUTION LISTSFORDOCUMENTS YOUDON'TNEED!TOTALNUMBEROFCOPIESREQUIRED:

LTTR13ENCL.'12 IndianaMichiganPowerCompany500CircleDriveBuchanan, Ml491071395 INQMNANICNESANPQWMDecember20,1996DocketNo:50-31550-316AEP:NRC:1245 10CFR50.90U.S.NuclearRegulatory Commission DocumentControlDeskWashington, D.C.20555Gentlemen:

DonaldC.CookNuclearPlantUnits1and2LICENSENOS.DPR-58ANDDPR"74PROPOSEDLICENSEANDTECHNICAL SPECIFICATION CHANGESOFREACTORCOOLANTPUMPFLYWHEELINSPECTION FREQUENCY Thisletteranditsattachments constitute anapplication foramendment ofthetechnical specifications (T/S)forCookNuclearPlantunits1and2.Changesareproposedtoreducethefrequency andscopeofreactorcoolantpumpflywheelinspections consistent withyourstaff'sevaluation ofWCAP-14535, "TopicalReportonReactorCoolantPumpFlywheelInspection Elimination."

Adescription oftheproposedchangesandananalysisconcerning significant hazardsconsideration pursuantto10CFR50.92iscontained inattachment 1.Attachment 2containstheexistingT/Spagesmarkedtoreflecttheproposedchanges.Attachment

.3containstheproposed, revisedT/Spages.WebelievetheproposedT/Schangeswillnotresultinasignificant changeinthetypesofeffluents orasignificant increaseintheamountofeffluentthatmightbereleasedoffsite,orasignificant increaseinindividual orcumulative occupational radiation exposure.

TheseproposedchangeshavebeenreviewedbythePlantNuclearSafetyReviewCommittee andtheNuclearSafetyandDesignReviewCommittee~

.Incompliance withtherequirements of10CFR50.91(b)(1),

copiesofthisletteranditsattachments havebeentransmitted totheMichiganPublicServiceCommission andtheMichiganDepartment.

ofPublicHealth.Sincerely, SWORNTOANDSUBSCRIBED BEFOREMEITHIS~ODAYOF~~Mt1996E.E.Fitpatrick96OO3VicePresident Attachments NotaryPublicMyCommission Expires:JANWATSONNOTARYPUBUC,BERRIENCOUNTY,MIIMYCOMMISSION EXPIRESFEB101999'Pbi2270iii 9hi220PDRADQCK050003l5PPDR J1';C.1Wtq'ae4~Ia,<<W*<<i~u~""C U.S.NuclearRegulatory Commission Page2AEP:NRC:1245cc:A.A.BlindA.B.BeachMDEQ"DWEcRPDNRCResidentInspector J.R.Padgett ATTACHMENT 1TOAEP:NRC:124S 10CFR50.92ANALYSISFORCHANGESTOTHEDONALDC.COOKNUCLEARPLANTUNITS1AND2TECHNICAL SPECIFICATIONS Attachment 1toAEP:NRC:1245 Page11.0SECTIONTOBECHANGED1.Unit1technical specification (T/S)4.4.10.12.Unit2T/S4.4.10.12.0EXTENTOFCHANGES1.Weareproposing tochangeunit1T/S4.4.10.1torequirereactorcoolantpump(RCP)flywheelinspections onceevery10yearsinthemannerdescribed below.Weareproposing tochangeunit2T/S4.4.10.1torequireRCPflywheelinspections onceevery10yearsinthemannerdescribed below.3.0CHANGESREUESTEDWeareproposing tomakethefollowing changetotheunit1andunit2T/Ss.Currently T/Ssection4.4.10.1requiresthateachreactorcoolantpumpflywheelbeinspected pertherecommendations ofregulatory positionC.4.bofRegulatory Guide(RG)1.14,Revision1,August1975.Theregulatory positionofRG1.14concerning ISIcallsforanin-placeultrasonic volumetric examination oftheareasofhigherstressconcentration attheboreandkeywayatapproximately 3-yearintervals andasurfaceexamination ofallexposedsurfacesandcompleteultrasonic volumetric examination atapproximately 10-yearintervals.

TheproposedT/Srequiresthateitheraqualified in-placeUTexamination overthevolumefromtheinnerboreoftheflywheeltothecircleofone-halftheouterradiusorasurfaceexamination (MTand/orPT)ofexposedsurfacesdefinedbythevolumeofthedisassembled flywheels beconducted onceevery10years.4.0DISCUSSION Technical Secification 4.4.10.1BasesT/S4.4.10.1ensuresthatthestructural integrity ofthereactorcoolantpumpflywheels willbemaintained atanacceptable levelthroughout thelifeoftheplant.Justification forProosedTechnical Secification ChanesTheproposedT/Samendment requesttoreducethefrequency andscopeofsurveillance oftheRCPflywheels isjustified forseveralreasons.Thischangeisconsistent withMr.Sheron's(Director DivisionofEngineering, OfficeofNuclearReactorRegulation) letterentitled"Acceptance forReferencing ofTopicalReportWCAP-14535,'TopicalReportonReactorCoolantPumpFlywheelInspection Elimination' andrelatedattachments.

Pertherequirement ofthisletter,wehaveconfirmed thattheRCPflywheels inplaceatCookNuclearPlantarecomposedofSA533Bmaterial.

ThoughWestinghouse ElectricCorporation reportWCAP-14535, entitled"TopicalReportonReactorCoolantPumpFlywheelInspection Elimination",

seekselimination offlywheelinspections, weonly Attachment 1toAEP:NRC:1245 Page2seektoreducethefrequency oftheseinspections toonceevery10years.WCAP-14535-concludes thefollowing.

1.Flywheels arecarefully designedandmanufactured fromexcellent qualitysteel,whichhasahighfracturetoughness.

2.Flywheeloverspeed isthecriticalloading,butleakbeforebreakhaslimitedthemaximumspeedtolessthan1500rpm.6.7.Flywheelinspections havebeenperformed for2Cyears,withnoindications ofserviceinducedflaws.Flywheelintegrity evaluations showveryhighflawtolerance fortheflywheels.

Crackextension overa60yearservicelifeisnegligible.

Structural reliability studieshaveshownthateliminating inspections after10yearsofplantlife willnotsignificantly changetheprobability offailure.Mostflawswhichcouldleadtofailurewouldbedetectedduringpreservice inspection oratworstearlyinplantlife,andcrackgrowthoverplantlifeisnegligible.

AsstatedintheSERassociated withWCAP-14535, assuminganinitialcrackof10%ofthedistancefromthekeywaytotheflywheelouterradiusandamaximumfatiguecrackgrowth,ASMEmarginswouldbemaintained duringthe10-yearinspection period.Inspections resultinmanremexposureandthepotential forflywheeldamageduringdisassembly andreassembly.

Basedontheaboveconclusions, inspections ofRCPflywheels witha10-yearfrequency andmodifiedscopearejustified.

5.0 NOSIGNIFICANT

HAZARDSCONSIDERATION Wehaveevaluated theproposedT/Schangesandhavedetermined they'onotrepresent asignificant hazardsconsideration basedonthecriteriaestablished in10CFR50.92(c).Operation ofCookNuclearPlantinaccordance withtheproposedamendment willnot:1.Involveasinificantincreaseintherobabilit orconseenceofanaccidentreviouslevaluated Thischangewillreducetnefrequency andscopeofthesurveillance testingonthereactorcoolantpumpflywheels.

Operating powerplantshavebeeninspecting theirflywheels forover20yearswithnoflawsidentified whichaffectflywheelintegrity.

Pastexaminations performed tosatisfyT/S4.4.10.1havenotrevealedanycrackingofflywheelplatesatCookNuclearPlant.Crackextension overa60yearservicelifeisnegligible.

Structural reliability studieshaveshownthateliminating inspections after10yearsofplantlifewillnotsignificantly change'he probability offailure.Mostflawswhichcouldleadto Attachment 1toAEP:NRC:1245 Page3failurewouldbedetectedduringpreservice inspection or,atworst,earlyinplantlife,andcrackgrowthoverplantlifeisnegligible.

AsstatedintheSERassociated withWCAP-14535, assuminganinitialcrackof10%ofthedistancefromthekeywaytotheflywheelouterradiusandamaximumfatiguecrackgrowth,ASMEmarginswouldbemaintained duringthe10-yearinspection period.Therefore, thechangeintestfrequency willnotendangerpublichealthorsafety.Forthesereasons,itisourbelieftheproposedchangesdonotinvolveasignificant increaseintheprobability orconsequences ofapreviously evaluated accident.

Createtheossibilit ofanewordifferent kindofaccidentfromanaccidentreviouslevaluated.

Thechangeswillnotintroduce anynewmodesofplantoperation, norwillanyphysicalchangestotheplantberequired.

Thus,thechangeswillnotcreatethepossibility ofanewordifferent kindofaccidentfromanyaccidentpreviously analyzedorevaluated.

3.Involveasinificantreduction inamarinofaafetThischangewillreducethefrequency andscopeofthesurveillance testingonthereactorcoolantpumpflywheels.

Operating powerplantshavebeeninspecting theirflywheels forover20yearswithnoflawsidentified whichaffectflywheelintegrity.

Pastexaminations performed tosatisfyT/S4.4.10.1havenotrevealedanycrackingofflywheelplatesatCookNuclearPlant.Crackextension overa60yearservicelifeisnegligible.

Structural reliability studieshaveshownthateliminating inspections after10yearsofplantlifewillnotsignificantly changetheprobability offailure.Mostflawswhichcouldleadtofailurewouldbedetectedduringpreservice irepection oratw'orstearlyinplantlife,andcrackgr.~thoverplantlifeisnegligible.

AsstatedintheSERassociated withWCAP-,14535,assuminganinitialcrackof10%ofthedistancef'romthekeywaytotheflywheelouterradiusandamaximumfatiguecrackgiowth,ASMEmarginswouldbemaintained duringthe10-yearinspection period.Forthesereasons,itisourbelieftheproposedchangesdonotinvolveasignificant reduction inamarginofsafety.6.0PENDINGTSPROPOSALS IMPACTING THISSUBMITTAL TherearenootherT/Sproposals underreviewthatimpactthissubmittal~

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