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{{#Wiki_filter:ACCELERATEDDI'lp~pt~IUTIONDEMONSTIONSYSTEMREGULATORYINFORMATIONDISTRIBUTIONSYSTEM(RIDS)ACCESSIONNBR:9402240306DOC.DATE:94/02/15NOTARIZED:YESDOCKETgFACIL:50-316DonaldC.CookNuclearPowerPlant,Unit2,IndianaM05000316AUTH.NAMEAUTHORAFFILIATIONFITZPATRXCK,E.IndianaMichiganPowerCo.(formerlyIndiana6MichiganEleRECIP.NAMERECXPIENTAFFILIATIONMURLEY,T.E.DocumentControlBranch(DocumentControlDesk)SUETECT:ApplicationforamendtoLicenseDPR-74,deletingTS3/4.3.4,associatedbases6associatedindexlistingsforturbineoverspeedprotection.DISTRIBUTIONCODE:A001DCOPIESRECEIVEDLTRENCLSIZE:TITLE:ORSubmittal:GeneralDistributionNOTES:DRECIPIENTXDCODE/NAMEPD3-1LAHICKMAN,JINTERNAL:NRR/DE/EELBNRR/DRCH/HICBNRR/DSSA/SPLBNUDOCS-ABSTRACTOGC/HDS2EXTERNAL:NRCPDRCOPIESLTTRENCL11221111111110RECIPIENTIDCODE/NAMEPD3-1PDNRR/DORS/OTSBNRR/DRPWNRR/DSSA/SRXBOCLFDQREGLEOlNSICCOPXESLTTRENCL111111111011DDRDNOTETOALL"RIDS"RECIPIENTS:DDPLEASEHELPUSTOREDUCEWASTE!CONTACTTHEDOCUMENTCONTROLDESK,ROOMPl-37(EXT.20079)TOELIMINATEYOURNAMEFROMDISTRIBUTIONLISTSFORDOCUMENTSYOUDON'TNEED!TOTALNUMBEROFCOPIESREQUIRED:LTTR16ENCL14 0~~t.4 IndianaMichiganPowerCompanyP.O.Box16631~Columbus,OH43216N'EP:NRC:1168ADonaldC.CookNuclearPlantUnit2LicenseNo.50-316DocketNo.DPR-74TECHNICALSPECIFICATIONSCHANGEREQUESTTODELETETURBINEOVERSPEEDPROTECTIONREQUIREMENTSU.STNuclearRegulatoryCommissionDocumentControlDeskWashington,D.C.20555Attn:T.E.MurleyFebruary15,1994
{{#Wiki_filter:ACCELERATED DI'lp~pt~IUTIONDEMONSTIONSYSTEMREGULATORY INFORMATION DISTRIBUTION SYSTEM(RIDS)ACCESSION NBR:9402240306 DOC.DATE:
94/02/15NOTARIZED:
YESDOCKETgFACIL:50-316 DonaldC.CookNuclearPowerPlant,Unit2,IndianaM05000316AUTH.NAMEAUTHORAFFILIATION FITZPATRXCK,E.
IndianaMichiganPowerCo.(formerly Indiana6MichiganEleRECIP.NAME RECXPIENT AFFILIATION MURLEY,T.E.
DocumentControlBranch(Document ControlDesk)SUETECT:Application foramendtoLicenseDPR-74,deleting TS3/4.3.4,associated bases6associated indexlistingsforturbineoverspeed protection.
DISTRIBUTION CODE:A001DCOPIESRECEIVEDLTRENCLSIZE:TITLE:ORSubmittal:
GeneralDistribution NOTES:DRECIPIENT XDCODE/NAME PD3-1LAHICKMAN,J INTERNAL:
NRR/DE/EELB NRR/DRCH/HICB NRR/DSSA/SPLB NUDOCS-ABSTRACT OGC/HDS2EXTERNAL:
NRCPDRCOPIESLTTRENCL11221111111110RECIPIENT IDCODE/NAME PD3-1PDNRR/DORS/OTSB NRR/DRPWNRR/DSSA/SRXB OCLFDQREGLEOlNSICCOPXESLTTRENCL111111111011DDRDNOTETOALL"RIDS"RECIPIENTS:
DDPLEASEHELPUSTOREDUCEWASTE!CONTACTTHEDOCUMENTCONTROLDESK,ROOMPl-37(EXT.20079)TOELIMINATE YOURNAMEFROMDISTRIBUTION LISTSFORDOCUMENTS YOUDON'TNEED!TOTALNUMBEROFCOPIESREQUIRED:
LTTR16ENCL14 0~~t.4 IndianaMichiganPowerCompanyP.O.Box16631~Columbus, OH43216N'EP:NRC:1168ADonaldC.CookNuclearPlantUnit2LicenseNo.50-316DocketNo.DPR-74TECHNICAL SPECIFICATIONS CHANGEREQUESTTODELETETURBINEOVERSPEED PROTECTION REQUIREMENTS U.STNuclearRegulatory Commission DocumentControlDeskWashington, D.C.20555Attn:T.E.MurleyFebruary15,1994


==DearDr.Murley:==
==DearDr.Murley:==
ThisletteranditsattachmentsconstituteanapplicationforamendmentofthelicenseconditionsandTechnicalSpecifications(T/Ss)fortheDonaldC.CookNuclearPlantUnit2.Specifically,thechangeproposedinthisletterdeletesT/S3/4.3.4,associatedbases,andassociatedindexlistingsfortheUnit2turbineoverspeedprotection.Theturbineoverspeedprotectioninstrumentationtripstheturbinetopreventgenerationofpotentiallydamagingmissilesfromtheturbineintheeventofalossoftheturbinespeedcontrolsystemoratransient.WebelievethepresenceofaT/SfortheUnit2turbineoverspeedprotectionisinappropriateandunnecessaryforthisbalance-of-plantsystem.ThisviewisconsistentwiththeMERITSprogramofNUREG-1431whichdoesnotincludeatechnicalspecificationforturbineoverspeedprotection.ThisT/SchangerequestisbeingproposedtoincreaseoperationalflexibilitytoconductturbinevalvetestingandmaintenanceandtoeliminatethisT/SdifferencebetweenUnit1andUnit2.ThisT/Schangewillnotsignificantlychangeourtestingpractices.Previoustestingresultsshownosignsofadverseturbinevalveconditions.WeintendtocontinuetotestUnit2andmaintaintheturbineoverspeedprotectionavailableduringpoweroperation.ThisT/SchangerequestistoproviderelieffromtherigidityofthepresentUnit2T/S.Xslyp0940224030h9402i5PDRADQCK05000516gp.PDR..
Thisletteranditsattachments constitute anapplication foramendment ofthelicenseconditions andTechnical Specifications (T/Ss)fortheDonaldC.CookNuclearPlantUnit2.Specifically, thechangeproposedinthisletterdeletesT/S3/4.3.4,associated bases,andassociated indexlistingsfortheUnit2turbineoverspeed protection.
IIV Dr.T.E.Murley-2-AEP:NRC:1168AAttachment,1providesadetaileddescriptionoftheproposedchanges,thejustificationforthechanges,andourproposeddeterminationofnosignificanthazardsconsiderationperformedpursuantto10CFR50.92.Attachment2containstheexistingT/Spagesmarkedtoreflecttheproposedchanges.Attachment3containstheproposedrevisedT/Spages.Inaddition,thisisourfirstCostBeneficialLicensingAction(CBLA)submittal.WeneedtoimplementthechangeintheupcomingUnit2refuelingoutagecommencingAugust5,1994.ThelifetimecostsavingsassociatedwiththisCBLAare$1,800,000asdetailedinAttachment4.Webelievetheproposedchangeswillnotresultin(1)asignificantchangeinthetypesofanyeffluentthatmaybereleasedoffsite,or(2)asignificantincreaseinindividualorcumulativeoccupationalradiationexposure.TheseproposedchangeshavebeenreviewedbythePlantNuclearSafetyReviewCommitteeandtheNuclearSafetyandDesignReviewCommittee.Incompliancewiththerequirementsof10CFR50'1(b)(1),copiesofthisletteranditsattachmentshavebeentransmittedtotheMichiganPublicServiceCommissionandtheMichiganDepartmentofPublicHealth.Thisletterissubmittedpursuantto10CFR50.30(b)and,assuch,anoathstatementisattached.Sincerely,ee,E.E.FitzpatrickVicePresidentdrAttachmentscc:A.A.BlindG.CharnoffJ.B.Martin-RegionIIINFEMSectionChiefNRCResidentInspectorJ.R.Padgett Dr.T.E.Murley3AEP:NRC:1168Abc:S.J.BrewerD.H.Malin/K.J.Toth/C.C.SavitscusM.L.Horvath-Bridgmanw/oattachmentsJ.B.Shinnock-w/oattachmentsW.G.Smith,Jr./S.H.SteinhartS.P.Hodge/J.D.Benes/G.D.HinesJ.B.Hickman,NRC-Washington,D.C.AEP:NRC:1168ADC-N-6015.1-w/oattachments STATEOFOHIO)COUNTYOFFRANKLIN)E.E.Fitzpatrick,beingdulysworn,deposesandsaysthatheistheVicePresidentoflicenseeIndianaMichiganPowerCompany,thathehasreadtheforgoingRequestforDeletionofUnit2TurbineOverspeedProtectionTechnicalSpecificationandknowsthecontentsthereof;andthatsaidcontentsaretruetothebestofhisknowledgeandbelief.Subscribedandsworntobeforemethis~edayof19~.NOTARYPUBLIC-BlTAD.HlLL~NOTARYPUOMCSTA1EorOHIOAYCOMMISSIOIIEXPIRES~
Theturbineoverspeed protection instrumentation tripstheturbinetopreventgeneration ofpotentially damagingmissilesfromtheturbineintheeventofalossoftheturbinespeedcontrolsystemoratransient.
Attachment1toAEP:NRC:1168A10CFR50.92ANALYSISFORCHANGESTODONALDC.COOKNUCLEARPLANTUNIT2TECHNICALSPECIFICATIONS
WebelievethepresenceofaT/SfortheUnit2turbineoverspeed protection isinappropriate andunnecessary forthisbalance-of-plant system.Thisviewisconsistent withtheMERITSprogramofNUREG-1431 whichdoesnotincludeatechnical specification forturbineoverspeed protection.
ThisT/Schangerequestisbeingproposedtoincreaseoperational flexibility toconductturbinevalvetestingandmaintenance andtoeliminate thisT/Sdifference betweenUnit1andUnit2.ThisT/Schangewillnotsignificantly changeourtestingpractices.
Previoustestingresultsshownosignsofadverseturbinevalveconditions.
WeintendtocontinuetotestUnit2andmaintaintheturbineoverspeed protection available duringpoweroperation.
ThisT/SchangerequestistoproviderelieffromtherigidityofthepresentUnit2T/S.Xslyp0940224030h 9402i5PDRADQCK05000516gp.PDR..
IIV Dr.T.E.Murley-2-AEP:NRC:1168A Attachment, 1providesadetaileddescription oftheproposedchanges,thejustification forthechanges,andourproposeddetermination ofnosignificant hazardsconsideration performed pursuantto10CFR50.92.Attachment 2containstheexistingT/Spagesmarkedtoreflecttheproposedchanges.Attachment 3containstheproposedrevisedT/Spages.Inaddition, thisisourfirstCostBeneficial Licensing Action(CBLA)submittal.
Weneedtoimplement thechangeintheupcomingUnit2refueling outagecommencing August5,1994.Thelifetimecostsavingsassociated withthisCBLAare$1,800,000 asdetailedinAttachment 4.Webelievetheproposedchangeswillnotresultin(1)asignificant changeinthetypesofanyeffluentthatmaybereleasedoffsite,or(2)asignificant increaseinindividual orcumulative occupational radiation exposure.
TheseproposedchangeshavebeenreviewedbythePlantNuclearSafetyReviewCommittee andtheNuclearSafetyandDesignReviewCommittee.
Incompliance withtherequirements of10CFR50'1(b)(1),
copiesofthisletteranditsattachments havebeentransmitted totheMichiganPublicServiceCommission andtheMichiganDepartment ofPublicHealth.Thisletterissubmitted pursuantto10CFR50.30(b)and,assuch,anoathstatement isattached.
Sincerely, ee,E.E.Fitzpatrick VicePresident drAttachments cc:A.A.BlindG.CharnoffJ.B.Martin-RegionIIINFEMSectionChiefNRCResidentInspector J.R.Padgett Dr.T.E.Murley3AEP:NRC:1168A bc:S.J.BrewerD.H.Malin/K.J.Toth/C.C.Savitscus M.L.Horvath-Bridgmanw/oattachments J.B.Shinnock-w/oattachments W.G.Smith,Jr./S.H.Steinhart S.P.Hodge/J.D.Benes/G.D.HinesJ.B.Hickman,NRC-Washington, D.C.AEP:NRC:1168A DC-N-6015.1
-w/oattachments STATEOFOHIO)COUNTYOFFRANKLIN)
E.E.Fitzpatrick, beingdulysworn,deposesandsaysthatheistheVicePresident oflicenseeIndianaMichiganPowerCompany,thathehasreadtheforgoingRequestforDeletionofUnit2TurbineOverspeed Protection Technical Specification andknowsthecontentsthereof;andthatsaidcontentsaretruetothebestofhisknowledge andbelief.Subscribed andsworntobeforemethis~edayof19~.NOTARYPUBLIC-BlTAD.HlLL~NOTARYPUOMCSTA1EorOHIOAYCOMMISSIOII EXPIRES~
Attachment 1toAEP:NRC:1168A 10CFR50.92ANALYSISFORCHANGESTODONALDC.COOKNUCLEARPLANTUNIT2TECHNICAL SPECIFICATIONS


Attachment1toAEP:NRC:1168APage11.0SectionstobeChanedUnit2T/SIndex-pagesVandXII,Unit2T/S3/4.3.4-pages3/43-65and3/43-66,Unit2Bases3/4.3.4-pageB3/43-4.2.0ExtentofChaneThislicenseamendmentrequestproposestodeleteTechnicalSpecification(T/S)3/4.3.4forUnit2anditsassociatedbasessectionandindexlistings.3.0SecificChanesReuesteda.WeproposetodeletetheentryonpageVoftheT/SindexforT/S3/4.3.4,TurbineOverspeedProtection.b.WeproposetodeletetheentryonpageXIIoftheT/SindexforBasessection3/4.3.4,TurbineOverspeedProtection.C,WeproposetodeleteT/S3/4.3'onpages3/43-65and3/43-66initsentirety.Toeffectthis,thepageswouldberemoved.d.WeproposetodeletethesecondparagraphanditsheadingonpageB3/43-4inthebasessection,therebydeletingthebasesonturbineoverspeedprotection.4.0DiscussionSstemDescritionadSafetFunctioAccordingtothebasesforthisT/S,thespecificationis"...providedtoensurethattheturbineoverspeedprotectioninstrumentationandtheturbinespeedcontrolvalvesareOPERABLEandwillprotecttheturbinefromexcessiveoverspeed.Protectionfromturbineexcessiveoverspeedisrequiredsinceexcessiveoverspeedoftheturbinecouldgeneratepotentiallydamagingmissileswhichcouldimpactanddamagesafetyrelatedcomponents,equipment,orstructures."ThepresentUnit2turbineoverspeedprotectionT/Slists"SurveillanceRequirements"b,c,anddonpage3/43-66undertheheadingof"LimitingConditionforOperation".ThisclericalerrorwillbecorrectedwhenthisT/Sisdeleted.
Attachment 1toAEP:NRC:1168A Page11.0SectionstobeChanedUnit2T/SIndex-pagesVandXII,Unit2T/S3/4.3.4-pages3/43-65and3/43-66,Unit2Bases3/4.3.4-pageB3/43-4.2.0ExtentofChaneThislicenseamendment requestproposestodeleteTechnical Specification (T/S)3/4.3.4forUnit2anditsassociated basessectionandindexlistings.
Attachment1toAEP:NRC:1168APage2TheUnit2turbinewasthefirstturbinemanufacturedbyBrownBoveritooperateatanuclearpowerplantinNorthAmerica.TherearetwoindependentmechanicaloverspeedtripsontheUnit2turbine.ThesurveillancerequirementsoftheUnit2T/Spresentlyrequirethatallturbinecontrol,stop,andinterceptvalvesbetestedthroughatleastonecompletecycleatleastoncepersevendays.ValvetestingisagoodpracticewhichisfollowedatCookNuclearPlant.FortheBrownBoveriturbinethesevalvesarecontrolledbytheTurbomatsystem.Aturbineshutdowntest,wherethevalvesarestroked,isperformedpriortoturbineroll.Thenormalturbinevalvetestisthenperformeduptosevendayslater.inMode1withabout8%powerormore.AtthattimetherequirementsforrunningtheTurbomatin"auto"havebeensatisfied.WiththeTurbomatin"auto",theTurbomatwilladjusttheremainingvalvestomaintainunitloadasonevalveistested.TheT/Salsorequiresdirectobservationofthemovementofeachofthevalvesonceper31days.Ithasbeenplantpracticethatthisdirectobservationbedoneeverysevendays,alsomeetingthe31dayT/Srequirements.TheT/Salsorequiresa"channelcalibration",whichisinterpretedtomeananactualoverspeedtest,oftheturbineoverspeedprotectionsystematleastonceper18months.OverspeedtestswillbecontinuedatCookNuclearPlantconsistentwithoperatingexperienceatCookNuclearPlantandapplicableindustryexperience.AlsoincludedintheT/Sistherequirementthatatleastonevalveofeachtype(control,mainstop,reheatstop,andreheatintercept)shallbedisassembledandinspectedatleastonceevery40months.ValveinspectionswillbecontinuedatCookNuclearPlantconsistentwithoperatingexperienceatCookNuclearPlantandapplicableindustryexperience.JustificationWebelievethatthepresenceofaT/Sforturbinevalvetestingandmaintenanceisinappropriateandunnecessarilyrestrictiveforabalance-of-plantsystem.Itisexpectedthattheoverspeedprotectionwillremainavailableduringpoweroperation.ThisT/SchangeistoproviderelieffromtherigidityofthepresentUnit2T/S.ThisT/Schangerequestisproposedforthefollowingreasons:thisT/Sisnotincludedinthenewstandardizedtechnicalspecifications(STS)developedbythemethodicallyengineered,restructured,andimprovedtechnicalspecifications(MERITS)program;itwillincreasethesimilarityoftheT/Ssforthetwounits;ourtestingpracticeswillnotsignificantlychange;since1983ourtestingresultsdonotshowsignsofadverseconditions;andwewillbelesslikelytotripthereactorasaresultoftryingtomeettheschedularrequirementsofthisT/S.
3.0SecificChanesReuesteda.WeproposetodeletetheentryonpageVoftheT/SindexforT/S3/4.3.4,TurbineOverspeed Protection.
Attachment1toAEP:NRC:1168APage3ThenewSTSdevelopedbytheMERITSprograminNUREG-1431doesnotincludeaT/Sforturbineoverspeedprotection.Ourmaintenanceoftheturbineoverspeedprotectionsystemwillpreventchallengestomissile-protectedequipment,TheomissionofanoverspeedprotectionT/SinNUREG-1431indicatesthataT/Sisnotneeded.ThisviewissupportedbyWCAP11618whichusestheNRC's"InterimPolicyStatementCriteria"toevaluatetheneedforaturbineoverspeedprotectionT/Sandconcludesthatitisnotneeded.AsimilarT/SdoesnotexistforUnit1.ThereasonforthisisthattheSTSofNUREG-0452werenotavailablewhenUnit1waslicensedbutwereadoptedforUnit2.AlthoughUnit1doesnothavea'urbineoverspeedprotectionT/S,thesurveillancesperformedontheUnit1turbinearesimilartothoseperformedontheUnit2turbine,asthisissimplygoodsurveillanceandtestpracticebasedonoperatingexperienceatCookNuclearPlantandapplicableindustryexperience.TheresultoftheproposedT/SchangeswillbetoreducetherigidityoftheschedularrequirementtoperformthesurveillanceforturbineoverspeedprotectiononUnit2sothatbothunitswillbetestedunderanadministrativeprogramoutsideofthetechnicalspecificationsandinaccordwithoperatingexperienceatCookNuclearPlantandapplicableindustryexperience.ThissimilarityinT/SsbetweenUnit1andUnit2benefitsthesafeoperationofbothunitsbecausetheincreasedconsistencybetweentheunitsminimizesthechanceofhumanerror.DespitethedeletionofthisT/S,thesurveillancetestswillnotsignificantlychangeontheUnit2turbine.TurbineoverspeedprotectionandsurveillancewillbemaintainedonUnit2,similartowhathasalwaysexisted.'nlytheT/Swillbedeleted.GoodsurveillanceandtestpracticesbasedonoperatingexperienceatCookNuclearPlantandapplicableindustryexperiencewillcontinuetobefollowedunderanadministrativeprogramoutsideofT/Ss.TheUnit2turbineisnowoperatinginitsninthoperatingcyclewithover90,000hoursofoperation.Turbineoverspeedprotectionsurveillanceresultshavebeenverygoodsinceunitstartupin1978.In1983,awearproblemwasfoundwiththeoverspeedplungers.Replacementplungerswereinstalled.Thenin1988,theseplungerswerereplacedwithpartshavingstellited(hardened)surfaces.Therehavebeennosubsequentproblems.DuringnormalpoweroperationtherequirementtoperformthisT/Ssurveillancehasthepotentialforbringingtheunitdownandthensubjectingtheplanttotransients.InperformingthisT/Ssurveillancetheplantcanencounterdifficultiesthatareunrelatedtothefunctionalityofthevalvesandoverspeedtripprotection.WebelievethatitissafertocontinuetooperateinMode1whilethesedifficultiesareworkedoutbothfromthepointofviewofapotentialreactortripandtheadditionalstressonplantpersonneltoperformtheworkina72-hourwindow.ShuttingdowntheunitbecauseofdifficultiesperformingthisT/Ssurveillance,inouropinion,isinappropriateandunnecessary.
b.WeproposetodeletetheentryonpageXIIoftheT/SindexforBasessection3/4.3.4,TurbineOverspeed Protection.
Attachment1toAEP:NRC:1168APage4TherearetwoindependentmechanicaloverspeedtripsontheUnit2turbine.Eachtripdeviceoperatesthroughaseparatechanneltotripallofthecontrol,mainstop,reheatstop,andreheatinterceptvalvesasitssetpointisreached.Eachmajorsteamlineenteringtheturbinehastwoindependentvalvesinseries.Thusitcanbeseenthatthereisredundantoverspeedprotection.TheBrownBoverilowpressureturbinerotorsareassembledfromseparateforgingsthatareweldedtogether.Theyarenotassembledusingashrunk--ondiskdesign.TheBrownBoveriweldeddesignisconsideredtobelesssusceptibletoturbineburst.5.0NoSiificantHazardsDeterminatioWehaveevaluatedtheproposedT/Schangesandhavedeterminedthatthechangesshouldinvolvenosignificanthazardsconsiderationbasedonthecriteriaestablishedin10CFR50.92(c).OperationofCookNuclearPlantinaccordancewiththeproposedamendmentwillnotsatisfyanyofthefollowingcriteria.(a)Involveasinificantincreaseintherobabilitorconseuencesofanaccidentreviouslevaluated.Theproposedamendmentdoesnotinvolveasignificantincreaseintheprobabilityorconsequencesforanaccidentpreviouslyevaluated.TheproposeddeletionoftheturbineoverspeedprotectionT/SwillnotsignificantlychangethesurveillancetestsontheUnit2turbine.ThesurveillancescheduleandtestswillbeunderadministrativeproceduresoutsideoftheTSssimilartothatofUnit1andwillbeinlinewithoperatingexperienceatCookNuclearPlantandapplicableindustryexperience.TheUnit2turbineisnowoperatinginitsninthoperatingcyclewithover90,000hoursofoperation.Turbineoverspeedprotectionsurveillanceresultshavebeenverygoodsinceunitstartupin1978.In1983,awearproblemwasfoundwiththeoverspeedplungers.Replacementplungerswereinstalled.Thenin1988,theseplungerswerereplacedwithpartshavingstellited(hardened)surfaces.Therehavebeennosubsequentproblems.Ourexpectationisthattheturbineoverspeedprotectionsystemwillremainavailabletoperformitsfunctionofpreventingexcessiveturbineoverspeed.Lastly,theSTSdevelopedbytheMERITSprograminNUREG-1431donotincludeaT/Sforturbineoverspeedprotection.TheomissionofanoverspeedprotectionT/SinNUREG-1431indicatesthataT/Sisnotneededtoensureanadequatelevelofsafetyforanuclearfacility.ThisviewissupportedbyWCAP11618whichusestheNRC's"InterimPolicyStatementCriteria"toevaluatetheneedforaturbineoverspeedprotectionT/Sandconcludesthatitisnotneeded.Forthesereasons,webelievethatdeletingtheturbineoverspeedprotectionT/Swillnotsignificantlyincreasetheprobabilityorconsequencesofanaccidentpreviouslyevaluated.
C,WeproposetodeleteT/S3/4.3'onpages3/43-65and3/43-66initsentirety.
Attachment1toAEP:NRC:1168APage5(b)Createtheossibilitofanewordifferentkindofaccidentfromanreviouslanalzed.Theproposedamendmentdoesnotcreatethepossibilityofanewordifferentkindofaccidentfromanypreviouslyevaluated.ThisrequesttodeletetheturbineoverspeedprotectionT/SeliminatesacontrolonthesurveillancetestingoftheUnit2turbine.Thedesignfunctionoftheturbineoverspeedprotectionandtheoperationoftheturbine/generatorremainthesame.TheoperatinghistoryoftheUnit2surveillanceresultstodateandourcontinuedtestingsupporttheviewthattheturbineoverspeedprotectionwillremainavailable.Forthesereasons,webelievethattheproposedchangeswillnotcreatethepossibilityofanewordifferentkindofaccidentfromanypreviouslyanalyzed.(c)InvoveasiificantreductioninamariofsafetTheproposedamendmentdoesnotinvolveasignificantreductioninthemarginofsafety.Turbineoverspeedprotectionsurveillanceresultshavebeenexcellentsince1983.TheyearsofoperatingdatawellwithinacceptancecriteriaonUnit2turbineoverspeedprotectionprovideampleevidencethatthereisnosignificantdegradationofthesystemtoperformitsfunction.Thereliabilityoftheoverspeedprotectionwasimprovedbythereplacementoftheplungerswithpartshavingstellitedsurfaces.ThesurveillancescheduleandtestswillbebasedonoperatingexperienceatCookNuclearPlantandapplicableindustryexperience.SurveillancetestingwillcontinueunderanadministrativeprogramoutsideofTSs.Thustheturbineoverspeedprotectionisexpectedtoremainavailable.AlsobyeliminatingthisT/SwewillbereducingthepotentialforshuttingdowntheunitbecauseofdifficultiesperformingthisT/Ssurveillanceunrelatedtothefunctionalityofthevalvesandoverspeedtripprotection.Lastly,theSTSdevelopedbytheMERITSprograminNUREG-1431donotincludeaT/Sforturbineoverspeedprotection.TheomissionofanoverspeedprotectionT/SinNUREG-1431indicatesthataT/Sisnotneededtoensureanadequatelevelofsafetyforanuclearfacility.ThisviewissupportedbyWCAP11618whichusestheNRC's"InterimPolicyStatementCriteria"toevaluatetheneedforaturbineoverspeedprotectionT/Sandconcludesthatitisnotneeded.Forthesereasons,webelievethattheturbineoverspeedprotectionsystemwillremainoperableandsothisproposedamendmentdoesnotinvolveasignificantreductioninthemarginofsafety.
Toeffectthis,thepageswouldberemoved.d.Weproposetodeletethesecondparagraph anditsheadingonpageB3/43-4inthebasessection,therebydeletingthebasesonturbineoverspeed protection.
Attachment1toAEP:NRC:1168APage66.0PendinTSProosalsImactinThisSubmittalNoneofthepagesinthissubmittalimpactnorareimpactedbyanycurrentlypendingT/Sproposals.
 
Attachment2toAEP:NRC:1168AEXISTINGTECHNICALSPECIFICATIONSPAGESMARKEDTOREFLECTPROPOSEDCHANGES}}
==4.0 Discussion==
SstemDescritionadSafetFunctioAccording tothebasesforthisT/S,thespecification is"...provided toensurethattheturbineoverspeed protection instrumentation andtheturbinespeedcontrolvalvesareOPERABLEandwillprotecttheturbinefromexcessive overspeed.
Protection fromturbineexcessive overspeed isrequiredsinceexcessive overspeed oftheturbinecouldgeneratepotentially damagingmissileswhichcouldimpactanddamagesafetyrelatedcomponents, equipment, orstructures."
ThepresentUnit2turbineoverspeed protection T/Slists"Surveillance Requirements" b,c,anddonpage3/43-66undertheheadingof"Limiting Condition forOperation".
Thisclericalerrorwillbecorrected whenthisT/Sisdeleted.
Attachment 1toAEP:NRC:1168A Page2TheUnit2turbinewasthefirstturbinemanufactured byBrownBoveritooperateatanuclearpowerplantinNorthAmerica.Therearetwoindependent mechanical overspeed tripsontheUnit2turbine.Thesurveillance requirements oftheUnit2T/Spresently requirethatallturbinecontrol,stop,andintercept valvesbetestedthroughatleastonecompletecycleatleastoncepersevendays.ValvetestingisagoodpracticewhichisfollowedatCookNuclearPlant.FortheBrownBoveriturbinethesevalvesarecontrolled bytheTurbomatsystem.Aturbineshutdowntest,wherethevalvesarestroked,isperformed priortoturbineroll.Thenormalturbinevalvetestisthenperformed uptosevendayslater.inMode1withabout8%powerormore.Atthattimetherequirements forrunningtheTurbomatin"auto"havebeensatisfied.
WiththeTurbomatin"auto",theTurbomatwilladjusttheremaining valvestomaintainunitloadasonevalveistested.TheT/Salsorequiresdirectobservation ofthemovementofeachofthevalvesonceper31days.Ithasbeenplantpracticethatthisdirectobservation bedoneeverysevendays,alsomeetingthe31dayT/Srequirements.
TheT/Salsorequiresa"channelcalibration",
whichisinterpreted tomeananactualoverspeed test,oftheturbineoverspeed protection systematleastonceper18months.Overspeed testswillbecontinued atCookNuclearPlantconsistent withoperating experience atCookNuclearPlantandapplicable industryexperience.
AlsoincludedintheT/Sistherequirement thatatleastonevalveofeachtype(control, mainstop,reheatstop,andreheatintercept) shallbedisassembled andinspected atleastonceevery40months.Valveinspections willbecontinued atCookNuclearPlantconsistent withoperating experience atCookNuclearPlantandapplicable industryexperience.
Justification WebelievethatthepresenceofaT/Sforturbinevalvetestingandmaintenance isinappropriate andunnecessarily restrictive forabalance-of-plantsystem.Itisexpectedthattheoverspeed protection willremainavailable duringpoweroperation.
ThisT/SchangeistoproviderelieffromtherigidityofthepresentUnit2T/S.ThisT/Schangerequestisproposedforthefollowing reasons:thisT/Sisnotincludedinthenewstandardized technical specifications (STS)developed bythemethodically engineered, restructured, andimprovedtechnical specifications (MERITS)program;itwillincreasethesimilarity oftheT/Ssforthetwounits;ourtestingpractices willnotsignificantly change;since1983ourtestingresultsdonotshowsignsofadverseconditions; andwewillbelesslikelytotripthereactorasaresultoftryingtomeettheschedular requirements ofthisT/S.
Attachment 1toAEP:NRC:1168A Page3ThenewSTSdeveloped bytheMERITSprograminNUREG-1431 doesnotincludeaT/Sforturbineoverspeed protection.
Ourmaintenance oftheturbineoverspeed protection systemwillpreventchallenges tomissile-protected equipment, Theomissionofanoverspeed protection T/SinNUREG-1431 indicates thataT/Sisnotneeded.Thisviewissupported byWCAP11618whichusestheNRC's"InterimPolicyStatement Criteria" toevaluatetheneedforaturbineoverspeed protection T/Sandconcludes thatitisnotneeded.AsimilarT/SdoesnotexistforUnit1.ThereasonforthisisthattheSTSofNUREG-0452 werenotavailable whenUnit1waslicensedbutwereadoptedforUnit2.AlthoughUnit1doesnothavea'urbineoverspeed protection T/S,thesurveillances performed ontheUnit1turbinearesimilartothoseperformed ontheUnit2turbine,asthisissimplygoodsurveillance andtestpracticebasedonoperating experience atCookNuclearPlantandapplicable industryexperience.
TheresultoftheproposedT/Schangeswillbetoreducetherigidityoftheschedular requirement toperformthesurveillance forturbineoverspeed protection onUnit2sothatbothunitswillbetestedunderanadministrative programoutsideofthetechnical specifications andinaccordwithoperating experience atCookNuclearPlantandapplicable industryexperience.
Thissimilarity inT/SsbetweenUnit1andUnit2benefitsthesafeoperation ofbothunitsbecausetheincreased consistency betweentheunitsminimizes thechanceofhumanerror.DespitethedeletionofthisT/S,thesurveillance testswillnotsignificantly changeontheUnit2turbine.Turbineoverspeed protection andsurveillance willbemaintained onUnit2,similartowhathasalwaysexisted.'nlytheT/Swillbedeleted.Goodsurveillance andtestpractices basedonoperating experience atCookNuclearPlantandapplicable industryexperience willcontinuetobefollowedunderanadministrative programoutsideofT/Ss.TheUnit2turbineisnowoperating initsninthoperating cyclewithover90,000hoursofoperation.
Turbineoverspeed protection surveillance resultshavebeenverygoodsinceunitstartupin1978.In1983,awearproblemwasfoundwiththeoverspeed plungers.
Replacement plungerswereinstalled.
Thenin1988,theseplungerswerereplacedwithpartshavingstellited (hardened) surfaces.
Therehavebeennosubsequent problems.
Duringnormalpoweroperation therequirement toperformthisT/Ssurveillance hasthepotential forbringingtheunitdownandthensubjecting theplanttotransients.
Inperforming thisT/Ssurveillance theplantcanencounter difficulties thatareunrelated tothefunctionality ofthevalvesandoverspeed tripprotection.
WebelievethatitissafertocontinuetooperateinMode1whilethesedifficulties areworkedoutbothfromthepointofviewofapotential reactortripandtheadditional stressonplantpersonnel toperformtheworkina72-hourwindow.Shuttingdowntheunitbecauseofdifficulties performing thisT/Ssurveillance, inouropinion,isinappropriate andunnecessary.
Attachment 1toAEP:NRC:1168A Page4Therearetwoindependent mechanical overspeed tripsontheUnit2turbine.Eachtripdeviceoperatesthroughaseparatechanneltotripallofthecontrol,mainstop,reheatstop,andreheatintercept valvesasitssetpointisreached.Eachmajorsteamlineenteringtheturbinehastwoindependent valvesinseries.Thusitcanbeseenthatthereisredundant overspeed protection.
TheBrownBoverilowpressureturbinerotorsareassembled fromseparateforgingsthatareweldedtogether.
Theyarenotassembled usingashrunk--ondiskdesign.TheBrownBoveriweldeddesignisconsidered tobelesssusceptible toturbineburst.5.0NoSiificantHazardsDeterminatio Wehaveevaluated theproposedT/Schangesandhavedetermined thatthechangesshouldinvolvenosignificant hazardsconsideration basedonthecriteriaestablished in10CFR50.92(c).
Operation ofCookNuclearPlantinaccordance withtheproposedamendment willnotsatisfyanyofthefollowing criteria.
(a)Involveasinificantincreaseintherobabilit orconseuencesofanaccidentreviouslevaluated.
Theproposedamendment doesnotinvolveasignificant increaseintheprobability orconsequences foranaccidentpreviously evaluated.
Theproposeddeletionoftheturbineoverspeed protection T/Swillnotsignificantly changethesurveillance testsontheUnit2turbine.Thesurveillance scheduleandtestswillbeunderadministrative procedures outsideoftheTSssimilartothatofUnit1andwillbeinlinewithoperating experience atCookNuclearPlantandapplicable industryexperience.
TheUnit2turbineisnowoperating initsninthoperating cyclewithover90,000hoursofoperation.
Turbineoverspeed protection surveillance resultshavebeenverygoodsinceunitstartupin1978.In1983,awearproblemwasfoundwiththeoverspeed plungers.
Replacement plungerswereinstalled.
Thenin1988,theseplungerswerereplacedwithpartshavingstellited (hardened) surfaces.
Therehavebeennosubsequent problems.
Ourexpectation isthattheturbineoverspeed protection systemwillremainavailable toperformitsfunctionofpreventing excessive turbineoverspeed.
Lastly,theSTSdeveloped bytheMERITSprograminNUREG-1431 donotincludeaT/Sforturbineoverspeed protection.
Theomissionofanoverspeed protection T/SinNUREG-1431 indicates thataT/Sisnotneededtoensureanadequatelevelofsafetyforanuclearfacility.
Thisviewissupported byWCAP11618whichusestheNRC's"InterimPolicyStatement Criteria" toevaluatetheneedforaturbineoverspeed protection T/Sandconcludes thatitisnotneeded.Forthesereasons,webelievethatdeletingtheturbineoverspeed protection T/Swillnotsignificantly increasetheprobability orconsequences ofanaccidentpreviously evaluated.
Attachment 1toAEP:NRC:1168A Page5(b)Createtheossibilit ofanewordifferent kindofaccidentfromanreviouslanalzed.Theproposedamendment doesnotcreatethepossibility ofanewordifferent kindofaccidentfromanypreviously evaluated.
Thisrequesttodeletetheturbineoverspeed protection T/Seliminates acontrolonthesurveillance testingoftheUnit2turbine.Thedesignfunctionoftheturbineoverspeed protection andtheoperation oftheturbine/generator remainthesame.Theoperating historyoftheUnit2surveillance resultstodateandourcontinued testingsupporttheviewthattheturbineoverspeed protection willremainavailable.
Forthesereasons,webelievethattheproposedchangeswillnotcreatethepossibility ofanewordifferent kindofaccidentfromanypreviously analyzed.
(c)Invoveasiificantreduction inamariofsafetTheproposedamendment doesnotinvolveasignificant reduction inthemarginofsafety.Turbineoverspeed protection surveillance resultshavebeenexcellent since1983.Theyearsofoperating datawellwithinacceptance criteriaonUnit2turbineoverspeed protection provideampleevidencethatthereisnosignificant degradation ofthesystemtoperformitsfunction.
Thereliability oftheoverspeed protection wasimprovedbythereplacement oftheplungerswithpartshavingstellited surfaces.
Thesurveillance scheduleandtestswillbebasedonoperating experience atCookNuclearPlantandapplicable industryexperience.
Surveillance testingwillcontinueunderanadministrative programoutsideofTSs.Thustheturbineoverspeed protection isexpectedtoremainavailable.
Alsobyeliminating thisT/Swewillbereducingthepotential forshuttingdowntheunitbecauseofdifficulties performing thisT/Ssurveillance unrelated tothefunctionality ofthevalvesandoverspeed tripprotection.
Lastly,theSTSdeveloped bytheMERITSprograminNUREG-1431 donotincludeaT/Sforturbineoverspeed protection.
Theomissionofanoverspeed protection T/SinNUREG-1431 indicates thataT/Sisnotneededtoensureanadequatelevelofsafetyforanuclearfacility.
Thisviewissupported byWCAP11618whichusestheNRC's"InterimPolicyStatement Criteria" toevaluatetheneedforaturbineoverspeed protection T/Sandconcludes thatitisnotneeded.Forthesereasons,webelievethattheturbineoverspeed protection systemwillremainoperableandsothisproposedamendment doesnotinvolveasignificant reduction inthemarginofsafety.
Attachment 1toAEP:NRC:1168A Page66.0PendinTSProosalsImactinThisSubmittal Noneofthepagesinthissubmittal impactnorareimpactedbyanycurrently pendingT/Sproposals.
Attachment 2toAEP:NRC:1168A EXISTINGTECHNICAL SPECIFICATIONS PAGESMARKEDTOREFLECTPROPOSEDCHANGES}}

Revision as of 07:13, 29 June 2018

Application for Amend to License DPR-74,deleting TS 3/4.3.4, Associated Bases & Associated Index Listings for Turbine Overspeed Protection
ML17331B232
Person / Time
Site: Cook American Electric Power icon.png
Issue date: 02/15/1994
From: FITZPATRICK E
INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To: MURLEY T E
NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML17331B233 List:
References
AEP:NRC:1168A, NUDOCS 9402240306
Download: ML17331B232 (16)
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Text

ACCELERATED DI'lp~pt~IUTIONDEMONSTIONSYSTEMREGULATORY INFORMATION DISTRIBUTION SYSTEM(RIDS)ACCESSION NBR:9402240306 DOC.DATE:

94/02/15NOTARIZED:

YESDOCKETgFACIL:50-316 DonaldC.CookNuclearPowerPlant,Unit2,IndianaM05000316AUTH.NAMEAUTHORAFFILIATION FITZPATRXCK,E.

IndianaMichiganPowerCo.(formerly Indiana6MichiganEleRECIP.NAME RECXPIENT AFFILIATION MURLEY,T.E.

DocumentControlBranch(Document ControlDesk)SUETECT:Application foramendtoLicenseDPR-74,deleting TS3/4.3.4,associated bases6associated indexlistingsforturbineoverspeed protection.

DISTRIBUTION CODE:A001DCOPIESRECEIVEDLTRENCLSIZE:TITLE:ORSubmittal:

GeneralDistribution NOTES:DRECIPIENT XDCODE/NAME PD3-1LAHICKMAN,J INTERNAL:

NRR/DE/EELB NRR/DRCH/HICB NRR/DSSA/SPLB NUDOCS-ABSTRACT OGC/HDS2EXTERNAL:

NRCPDRCOPIESLTTRENCL11221111111110RECIPIENT IDCODE/NAME PD3-1PDNRR/DORS/OTSB NRR/DRPWNRR/DSSA/SRXB OCLFDQREGLEOlNSICCOPXESLTTRENCL111111111011DDRDNOTETOALL"RIDS"RECIPIENTS:

DDPLEASEHELPUSTOREDUCEWASTE!CONTACTTHEDOCUMENTCONTROLDESK,ROOMPl-37(EXT.20079)TOELIMINATE YOURNAMEFROMDISTRIBUTION LISTSFORDOCUMENTS YOUDON'TNEED!TOTALNUMBEROFCOPIESREQUIRED:

LTTR16ENCL14 0~~t.4 IndianaMichiganPowerCompanyP.O.Box16631~Columbus, OH43216N'EP:NRC:1168ADonaldC.CookNuclearPlantUnit2LicenseNo.50-316DocketNo.DPR-74TECHNICAL SPECIFICATIONS CHANGEREQUESTTODELETETURBINEOVERSPEED PROTECTION REQUIREMENTS U.STNuclearRegulatory Commission DocumentControlDeskWashington, D.C.20555Attn:T.E.MurleyFebruary15,1994

DearDr.Murley:

Thisletteranditsattachments constitute anapplication foramendment ofthelicenseconditions andTechnical Specifications (T/Ss)fortheDonaldC.CookNuclearPlantUnit2.Specifically, thechangeproposedinthisletterdeletesT/S3/4.3.4,associated bases,andassociated indexlistingsfortheUnit2turbineoverspeed protection.

Theturbineoverspeed protection instrumentation tripstheturbinetopreventgeneration ofpotentially damagingmissilesfromtheturbineintheeventofalossoftheturbinespeedcontrolsystemoratransient.

WebelievethepresenceofaT/SfortheUnit2turbineoverspeed protection isinappropriate andunnecessary forthisbalance-of-plant system.Thisviewisconsistent withtheMERITSprogramofNUREG-1431 whichdoesnotincludeatechnical specification forturbineoverspeed protection.

ThisT/Schangerequestisbeingproposedtoincreaseoperational flexibility toconductturbinevalvetestingandmaintenance andtoeliminate thisT/Sdifference betweenUnit1andUnit2.ThisT/Schangewillnotsignificantly changeourtestingpractices.

Previoustestingresultsshownosignsofadverseturbinevalveconditions.

WeintendtocontinuetotestUnit2andmaintaintheturbineoverspeed protection available duringpoweroperation.

ThisT/SchangerequestistoproviderelieffromtherigidityofthepresentUnit2T/S.Xslyp0940224030h 9402i5PDRADQCK05000516gp.PDR..

IIV Dr.T.E.Murley-2-AEP:NRC:1168A Attachment, 1providesadetaileddescription oftheproposedchanges,thejustification forthechanges,andourproposeddetermination ofnosignificant hazardsconsideration performed pursuantto10CFR50.92.Attachment 2containstheexistingT/Spagesmarkedtoreflecttheproposedchanges.Attachment 3containstheproposedrevisedT/Spages.Inaddition, thisisourfirstCostBeneficial Licensing Action(CBLA)submittal.

Weneedtoimplement thechangeintheupcomingUnit2refueling outagecommencing August5,1994.Thelifetimecostsavingsassociated withthisCBLAare$1,800,000 asdetailedinAttachment 4.Webelievetheproposedchangeswillnotresultin(1)asignificant changeinthetypesofanyeffluentthatmaybereleasedoffsite,or(2)asignificant increaseinindividual orcumulative occupational radiation exposure.

TheseproposedchangeshavebeenreviewedbythePlantNuclearSafetyReviewCommittee andtheNuclearSafetyandDesignReviewCommittee.

Incompliance withtherequirements of10CFR50'1(b)(1),

copiesofthisletteranditsattachments havebeentransmitted totheMichiganPublicServiceCommission andtheMichiganDepartment ofPublicHealth.Thisletterissubmitted pursuantto10CFR50.30(b)and,assuch,anoathstatement isattached.

Sincerely, ee,E.E.Fitzpatrick VicePresident drAttachments cc:A.A.BlindG.CharnoffJ.B.Martin-RegionIIINFEMSectionChiefNRCResidentInspector J.R.Padgett Dr.T.E.Murley3AEP:NRC:1168A bc:S.J.BrewerD.H.Malin/K.J.Toth/C.C.Savitscus M.L.Horvath-Bridgmanw/oattachments J.B.Shinnock-w/oattachments W.G.Smith,Jr./S.H.Steinhart S.P.Hodge/J.D.Benes/G.D.HinesJ.B.Hickman,NRC-Washington, D.C.AEP:NRC:1168A DC-N-6015.1

-w/oattachments STATEOFOHIO)COUNTYOFFRANKLIN)

E.E.Fitzpatrick, beingdulysworn,deposesandsaysthatheistheVicePresident oflicenseeIndianaMichiganPowerCompany,thathehasreadtheforgoingRequestforDeletionofUnit2TurbineOverspeed Protection Technical Specification andknowsthecontentsthereof;andthatsaidcontentsaretruetothebestofhisknowledge andbelief.Subscribed andsworntobeforemethis~edayof19~.NOTARYPUBLIC-BlTAD.HlLL~NOTARYPUOMCSTA1EorOHIOAYCOMMISSIOII EXPIRES~

Attachment 1toAEP:NRC:1168A 10CFR50.92ANALYSISFORCHANGESTODONALDC.COOKNUCLEARPLANTUNIT2TECHNICAL SPECIFICATIONS

Attachment 1toAEP:NRC:1168A Page11.0SectionstobeChanedUnit2T/SIndex-pagesVandXII,Unit2T/S3/4.3.4-pages3/43-65and3/43-66,Unit2Bases3/4.3.4-pageB3/43-4.2.0ExtentofChaneThislicenseamendment requestproposestodeleteTechnical Specification (T/S)3/4.3.4forUnit2anditsassociated basessectionandindexlistings.

3.0SecificChanesReuesteda.WeproposetodeletetheentryonpageVoftheT/SindexforT/S3/4.3.4,TurbineOverspeed Protection.

b.WeproposetodeletetheentryonpageXIIoftheT/SindexforBasessection3/4.3.4,TurbineOverspeed Protection.

C,WeproposetodeleteT/S3/4.3'onpages3/43-65and3/43-66initsentirety.

Toeffectthis,thepageswouldberemoved.d.Weproposetodeletethesecondparagraph anditsheadingonpageB3/43-4inthebasessection,therebydeletingthebasesonturbineoverspeed protection.

4.0 Discussion

SstemDescritionadSafetFunctioAccording tothebasesforthisT/S,thespecification is"...provided toensurethattheturbineoverspeed protection instrumentation andtheturbinespeedcontrolvalvesareOPERABLEandwillprotecttheturbinefromexcessive overspeed.

Protection fromturbineexcessive overspeed isrequiredsinceexcessive overspeed oftheturbinecouldgeneratepotentially damagingmissileswhichcouldimpactanddamagesafetyrelatedcomponents, equipment, orstructures."

ThepresentUnit2turbineoverspeed protection T/Slists"Surveillance Requirements" b,c,anddonpage3/43-66undertheheadingof"Limiting Condition forOperation".

Thisclericalerrorwillbecorrected whenthisT/Sisdeleted.

Attachment 1toAEP:NRC:1168A Page2TheUnit2turbinewasthefirstturbinemanufactured byBrownBoveritooperateatanuclearpowerplantinNorthAmerica.Therearetwoindependent mechanical overspeed tripsontheUnit2turbine.Thesurveillance requirements oftheUnit2T/Spresently requirethatallturbinecontrol,stop,andintercept valvesbetestedthroughatleastonecompletecycleatleastoncepersevendays.ValvetestingisagoodpracticewhichisfollowedatCookNuclearPlant.FortheBrownBoveriturbinethesevalvesarecontrolled bytheTurbomatsystem.Aturbineshutdowntest,wherethevalvesarestroked,isperformed priortoturbineroll.Thenormalturbinevalvetestisthenperformed uptosevendayslater.inMode1withabout8%powerormore.Atthattimetherequirements forrunningtheTurbomatin"auto"havebeensatisfied.

WiththeTurbomatin"auto",theTurbomatwilladjusttheremaining valvestomaintainunitloadasonevalveistested.TheT/Salsorequiresdirectobservation ofthemovementofeachofthevalvesonceper31days.Ithasbeenplantpracticethatthisdirectobservation bedoneeverysevendays,alsomeetingthe31dayT/Srequirements.

TheT/Salsorequiresa"channelcalibration",

whichisinterpreted tomeananactualoverspeed test,oftheturbineoverspeed protection systematleastonceper18months.Overspeed testswillbecontinued atCookNuclearPlantconsistent withoperating experience atCookNuclearPlantandapplicable industryexperience.

AlsoincludedintheT/Sistherequirement thatatleastonevalveofeachtype(control, mainstop,reheatstop,andreheatintercept) shallbedisassembled andinspected atleastonceevery40months.Valveinspections willbecontinued atCookNuclearPlantconsistent withoperating experience atCookNuclearPlantandapplicable industryexperience.

Justification WebelievethatthepresenceofaT/Sforturbinevalvetestingandmaintenance isinappropriate andunnecessarily restrictive forabalance-of-plantsystem.Itisexpectedthattheoverspeed protection willremainavailable duringpoweroperation.

ThisT/SchangeistoproviderelieffromtherigidityofthepresentUnit2T/S.ThisT/Schangerequestisproposedforthefollowing reasons:thisT/Sisnotincludedinthenewstandardized technical specifications (STS)developed bythemethodically engineered, restructured, andimprovedtechnical specifications (MERITS)program;itwillincreasethesimilarity oftheT/Ssforthetwounits;ourtestingpractices willnotsignificantly change;since1983ourtestingresultsdonotshowsignsofadverseconditions; andwewillbelesslikelytotripthereactorasaresultoftryingtomeettheschedular requirements ofthisT/S.

Attachment 1toAEP:NRC:1168A Page3ThenewSTSdeveloped bytheMERITSprograminNUREG-1431 doesnotincludeaT/Sforturbineoverspeed protection.

Ourmaintenance oftheturbineoverspeed protection systemwillpreventchallenges tomissile-protected equipment, Theomissionofanoverspeed protection T/SinNUREG-1431 indicates thataT/Sisnotneeded.Thisviewissupported byWCAP11618whichusestheNRC's"InterimPolicyStatement Criteria" toevaluatetheneedforaturbineoverspeed protection T/Sandconcludes thatitisnotneeded.AsimilarT/SdoesnotexistforUnit1.ThereasonforthisisthattheSTSofNUREG-0452 werenotavailable whenUnit1waslicensedbutwereadoptedforUnit2.AlthoughUnit1doesnothavea'urbineoverspeed protection T/S,thesurveillances performed ontheUnit1turbinearesimilartothoseperformed ontheUnit2turbine,asthisissimplygoodsurveillance andtestpracticebasedonoperating experience atCookNuclearPlantandapplicable industryexperience.

TheresultoftheproposedT/Schangeswillbetoreducetherigidityoftheschedular requirement toperformthesurveillance forturbineoverspeed protection onUnit2sothatbothunitswillbetestedunderanadministrative programoutsideofthetechnical specifications andinaccordwithoperating experience atCookNuclearPlantandapplicable industryexperience.

Thissimilarity inT/SsbetweenUnit1andUnit2benefitsthesafeoperation ofbothunitsbecausetheincreased consistency betweentheunitsminimizes thechanceofhumanerror.DespitethedeletionofthisT/S,thesurveillance testswillnotsignificantly changeontheUnit2turbine.Turbineoverspeed protection andsurveillance willbemaintained onUnit2,similartowhathasalwaysexisted.'nlytheT/Swillbedeleted.Goodsurveillance andtestpractices basedonoperating experience atCookNuclearPlantandapplicable industryexperience willcontinuetobefollowedunderanadministrative programoutsideofT/Ss.TheUnit2turbineisnowoperating initsninthoperating cyclewithover90,000hoursofoperation.

Turbineoverspeed protection surveillance resultshavebeenverygoodsinceunitstartupin1978.In1983,awearproblemwasfoundwiththeoverspeed plungers.

Replacement plungerswereinstalled.

Thenin1988,theseplungerswerereplacedwithpartshavingstellited (hardened) surfaces.

Therehavebeennosubsequent problems.

Duringnormalpoweroperation therequirement toperformthisT/Ssurveillance hasthepotential forbringingtheunitdownandthensubjecting theplanttotransients.

Inperforming thisT/Ssurveillance theplantcanencounter difficulties thatareunrelated tothefunctionality ofthevalvesandoverspeed tripprotection.

WebelievethatitissafertocontinuetooperateinMode1whilethesedifficulties areworkedoutbothfromthepointofviewofapotential reactortripandtheadditional stressonplantpersonnel toperformtheworkina72-hourwindow.Shuttingdowntheunitbecauseofdifficulties performing thisT/Ssurveillance, inouropinion,isinappropriate andunnecessary.

Attachment 1toAEP:NRC:1168A Page4Therearetwoindependent mechanical overspeed tripsontheUnit2turbine.Eachtripdeviceoperatesthroughaseparatechanneltotripallofthecontrol,mainstop,reheatstop,andreheatintercept valvesasitssetpointisreached.Eachmajorsteamlineenteringtheturbinehastwoindependent valvesinseries.Thusitcanbeseenthatthereisredundant overspeed protection.

TheBrownBoverilowpressureturbinerotorsareassembled fromseparateforgingsthatareweldedtogether.

Theyarenotassembled usingashrunk--ondiskdesign.TheBrownBoveriweldeddesignisconsidered tobelesssusceptible toturbineburst.5.0NoSiificantHazardsDeterminatio Wehaveevaluated theproposedT/Schangesandhavedetermined thatthechangesshouldinvolvenosignificant hazardsconsideration basedonthecriteriaestablished in10CFR50.92(c).

Operation ofCookNuclearPlantinaccordance withtheproposedamendment willnotsatisfyanyofthefollowing criteria.

(a)Involveasinificantincreaseintherobabilit orconseuencesofanaccidentreviouslevaluated.

Theproposedamendment doesnotinvolveasignificant increaseintheprobability orconsequences foranaccidentpreviously evaluated.

Theproposeddeletionoftheturbineoverspeed protection T/Swillnotsignificantly changethesurveillance testsontheUnit2turbine.Thesurveillance scheduleandtestswillbeunderadministrative procedures outsideoftheTSssimilartothatofUnit1andwillbeinlinewithoperating experience atCookNuclearPlantandapplicable industryexperience.

TheUnit2turbineisnowoperating initsninthoperating cyclewithover90,000hoursofoperation.

Turbineoverspeed protection surveillance resultshavebeenverygoodsinceunitstartupin1978.In1983,awearproblemwasfoundwiththeoverspeed plungers.

Replacement plungerswereinstalled.

Thenin1988,theseplungerswerereplacedwithpartshavingstellited (hardened) surfaces.

Therehavebeennosubsequent problems.

Ourexpectation isthattheturbineoverspeed protection systemwillremainavailable toperformitsfunctionofpreventing excessive turbineoverspeed.

Lastly,theSTSdeveloped bytheMERITSprograminNUREG-1431 donotincludeaT/Sforturbineoverspeed protection.

Theomissionofanoverspeed protection T/SinNUREG-1431 indicates thataT/Sisnotneededtoensureanadequatelevelofsafetyforanuclearfacility.

Thisviewissupported byWCAP11618whichusestheNRC's"InterimPolicyStatement Criteria" toevaluatetheneedforaturbineoverspeed protection T/Sandconcludes thatitisnotneeded.Forthesereasons,webelievethatdeletingtheturbineoverspeed protection T/Swillnotsignificantly increasetheprobability orconsequences ofanaccidentpreviously evaluated.

Attachment 1toAEP:NRC:1168A Page5(b)Createtheossibilit ofanewordifferent kindofaccidentfromanreviouslanalzed.Theproposedamendment doesnotcreatethepossibility ofanewordifferent kindofaccidentfromanypreviously evaluated.

Thisrequesttodeletetheturbineoverspeed protection T/Seliminates acontrolonthesurveillance testingoftheUnit2turbine.Thedesignfunctionoftheturbineoverspeed protection andtheoperation oftheturbine/generator remainthesame.Theoperating historyoftheUnit2surveillance resultstodateandourcontinued testingsupporttheviewthattheturbineoverspeed protection willremainavailable.

Forthesereasons,webelievethattheproposedchangeswillnotcreatethepossibility ofanewordifferent kindofaccidentfromanypreviously analyzed.

(c)Invoveasiificantreduction inamariofsafetTheproposedamendment doesnotinvolveasignificant reduction inthemarginofsafety.Turbineoverspeed protection surveillance resultshavebeenexcellent since1983.Theyearsofoperating datawellwithinacceptance criteriaonUnit2turbineoverspeed protection provideampleevidencethatthereisnosignificant degradation ofthesystemtoperformitsfunction.

Thereliability oftheoverspeed protection wasimprovedbythereplacement oftheplungerswithpartshavingstellited surfaces.

Thesurveillance scheduleandtestswillbebasedonoperating experience atCookNuclearPlantandapplicable industryexperience.

Surveillance testingwillcontinueunderanadministrative programoutsideofTSs.Thustheturbineoverspeed protection isexpectedtoremainavailable.

Alsobyeliminating thisT/Swewillbereducingthepotential forshuttingdowntheunitbecauseofdifficulties performing thisT/Ssurveillance unrelated tothefunctionality ofthevalvesandoverspeed tripprotection.

Lastly,theSTSdeveloped bytheMERITSprograminNUREG-1431 donotincludeaT/Sforturbineoverspeed protection.

Theomissionofanoverspeed protection T/SinNUREG-1431 indicates thataT/Sisnotneededtoensureanadequatelevelofsafetyforanuclearfacility.

Thisviewissupported byWCAP11618whichusestheNRC's"InterimPolicyStatement Criteria" toevaluatetheneedforaturbineoverspeed protection T/Sandconcludes thatitisnotneeded.Forthesereasons,webelievethattheturbineoverspeed protection systemwillremainoperableandsothisproposedamendment doesnotinvolveasignificant reduction inthemarginofsafety.

Attachment 1toAEP:NRC:1168A Page66.0PendinTSProosalsImactinThisSubmittal Noneofthepagesinthissubmittal impactnorareimpactedbyanycurrently pendingT/Sproposals.

Attachment 2toAEP:NRC:1168A EXISTINGTECHNICAL SPECIFICATIONS PAGESMARKEDTOREFLECTPROPOSEDCHANGES

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