ML17335A231

Application for Amends to Licenses DPR-58 & DPR-74,changing Runout Limits for Safety Injection Pump to 675 Gpm Unless Pump Is Specifically Tested to Higher Flow Rate Not Exceeding 700 Gpm

ML17335A231
Person / Time
Site:	Cook
Issue date:	09/14/1998
From:	POWERS R P INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML17335A233	List: ML17335A231 ML17335A234
References
AEP:NRC:1274, NUDOCS 9809220081
Download: ML17335A231 (12)

Text

CATEGORY11REGULATYINFORMATIONDISTRIBUTIOSYSTEM(RIDS)DOCKET¹0500031505000316ACCESSIONNBR:9809220081,DOC.DATE:98/09/14NOTARIZED:YESFACIL:50-315DonaldC.CookNuclearPowerPlant,Unit1,IndianaM50;316PonaldC.CookNuclearPowerPlant,Unit2,IndianaMAUTH.NAMEAUTHORAFFILIATIONPOWERS,R.P.'IndunaMichiganPowerCo.(formerlyIndiana&MichiganEleRECIP.NAMERECIPIENTAFFILIATIONRecordsManagementBranch(DocumentControlDesk)

SUBJECT:

ApplicationforamendstolicensesDPR-588DPR-74,revisingTSpage3/45-6.D1STRZBUT10NCODE:A'OOZDCORTESRECEZVED:LTR)ENCLISZEE:P1TITLE:ORSubmittal:GeneralDistributionNOTES:AT,ERECIPIENTIDCODE/NAMEPD3-3LASTANG,JINTERNAILECENTER01NRR/DSSA/SPLBNUDOCS-ABSTRACTEXTERNAL:NOACCOPIESLTTRENCL111111111111RECIPIENTIDCODE/NAMEPD3-3PDNRR/DE/ECGB/ANRR/DRCH/HICBNRR/DSSA/SRXBOGC/HDS3NRCPDRCOPIESLTTRENCL1111111110110D'NOTETOALL"RIDS"REC1PIENTS:PLEASEHELPUSTOREDUCEWASTE.TOHAVEYOURNAMEORORGANIZATIONREMOVEDFROMDISTRZBUTIONLISTSORREDUCETHENUMBEROFCOPIESRECEIVEDBYYOUORYOURORGANIZATION,CONTACTTHEDOCUMENTCONTROLDESK(DCD)ONEXTENSION415-2083TOTALNUMBEROFCOPIESREQUIRED:LTTR13ENCL12 IC indianaMichigan~PowerCompany500CircleDriveBuchanan,Ml491071373September14,1998AEP:NRC:127410CFR50.92DocketNos.:50-31550-316U.S.NuclearRegulatoryCommissionATTN:DocumentControlDeskMailStop0-Pl-17Washington,D.C.20555-0001Gentlemen:DONALDC.COOKNUCLEARPLANTUNITS1AND2TECHNICALSPECIFICATIONAMENDMENTSAFETYINJECTIONPUMPRUNOUTFLOWLIMITSThisletteranditsattachmentsconstituteanapplicationforamendmenttothetechnicalspecifications(T/Ss)forCookNuclearPlantunits1and2.Thisamendmentwillchangetherunoutlimitsforasafetyinjectionpumpto675gpmunlessthepumpisspecificallytestedtoahigherflowratenotexceeding700gpm.BackgroundinformationrelevanttotheT/Schangeandouranalysesconcerningsignificanthazardsconsiderationsarecontainedinattachment1tothisletter.Attachment2containsthecurrentT/Spages,marked-uptoreflecttheproposedchange.TheproposedrevisedT/Spagesarecontainedinattachment3.ThissubmittalproposesachangetoT/Spage3/45-6forbothunit1and2.Theproposedchangewillnotresultinasignificantchangeinthetypesofeffluentsorasignificantincreaseintheamountsofanyeffluentsthatmaybereleasedoffsiteorasignificantincreaseinindividualorcumulativeoccupationalradiationexposure.Theproposedchangehasbeenreviewedandapprovedbytheplantnuclearsafetyreviewcommitteeandthenuclearsafetyanddesignreviewcommittee.Werequestthattheapprovedamendmentbeeffectivethirtydaysfromissuance.980'72200819809'X4PDRADOCK05000815P'OR U.S~NuclearRegulatoryCommissionPage2AEP:NRC:1274Inaccordancewiththerequirementsof10CFR50.91(b)(1),copiesofthisletteranditsattachmentshavebeentransmittedtotheMichiganPublicServiceCommissionandtheMichiganDepartmentofPublicHealth.R.P.PowersVicePresidentSWORNTOANDSUBSCRIBEDBEFOREME~l~san*iINDENotaryPubliMycommissionexpiresl2Z01/jmcAttachmentsc:J.A.Abramson,w/attachmentsJ.L.Caldwell,w/attachmentsMDEQ-DW&RPD,w/attachmentsNRCResidentInspector,w/attachmentsJ.R.Sampson,w/attachments sLC

~~ATTACHMENT1TOAEP:NRC:1274SUPPORTINGANALYSESFORAMENDMENTTOTHETECHNICALSPECIFICATIONSSAFETYINJECTIONPUMPRUNOUTFLOWLIMITS Attachment1toAEP:NRC:1274Page1BackroundAmendmentnumbers84(6/24/85)and64(6/18/84),respectively,totheunit1andunit2.technicalspecifications(T/Ss)incorporatedachangetotheallowablesafetyinjection(SI)pumprunoutlimitsinT/S4.5.2.h.ThechangeraisedthepermissiblerunoutflowofasingleSIpumpfrom650gpmto700gpm.ThepumprunoutflowchangeswerenecessitatedbyphysicalchangestotheSIpumpminiflowrecirculationlines.Thesephysicalchangesincreasedminiflowcapacityfrom30gpmtoapproximately60gpmanditwasanticipatedthattheincreasedminiflowwouldmakeitdifficulttoachievealloftheSIpumpdesignflowobjectiveswithoutexceedingthe650gpmrunoutlimitexistingatthattime.Thejustificationforthechangefrom650to700gpmwasbasedonvendortesting(DresserIndustries)ofasingleCookNuclearPlantreplacementsafetyinjectionpumpandaspareelement.Thetestingestablishedsafepumpoperationuptoamaximumflowof700gpm.WeconfirmedthattheavailablenetpositivesuctionheadtotheSIpumps,asinstalledattheplant,wasgreaterthanthatrequiredtosafelyachieve700gpmduringthevendortesting.Therefore,webelievedthistestingwasalsoapplicabletothethree(untested)installedpumps.In1991,wereceivedcorrespondencefromWestinghouseindicatingthatthegenericrunoutlimitsforPacific2"JTCHpumpswas675gpmunlesseachspecificpumpwastestedtoahigherflow.Atourrequest,DresserreviewedthepumprunoutlimitsforCookNuclearPlant.Basedontheirreview,Dresserconcludedthefollowing:1)forthespecificreplacementpumpandspareelementpreviouslytestedbythem,the700gpmrunoutlimitremainedapplicable(thisappliestotheunit2northpump);and2)forother(untested)SIpumps,Dresser'spositionwastoabidebythegeneralWestinghouselimitof675gpm(thisappliestobothunit1pumpsandtheunit2southpump).Theyindicatedthatmanufacturingtolerancesinsandcastimpellersandmaterialchangesinthepumpcasing(ofthetestedreplacementpump)couldresultintestvariationsthatlimitapplicabilityofthetestingbetweenpumps.Dresseralsoindicatedthatthegenericlimitof675gpmcouldbeincreasedforthethreeuntestedpumps,withappropriateinplaceorvendortesting.ReviewofSIpumpflowbalancingdataindicatedthatproperbalancingcouldbeachievedwithoutexceeding675gpmforthethreepumpsthathadnotbeenspecificallytestedforhigherflows.Procedure12EHP4030STP~208SIgU1&U2ECCSFLOWBALANCESAFETYINJECTlONSYSTEM",waschangedtoadministrativelylimitflowofthethreeuntestedpumpsto675gpm.Basedonproceduralcontrolsforlimitingrunoutflowofthethreeuntestedpumps,weconcludedin1992thattheintentofT/S4.5.2.hwasbeingmetandthatachangetotheT/Sswasnotnecessary.However,additionalrecentreviewhasconcludedthatachangetotheT/Sshouldhavebeeninitiated.ThissubmittalprovidesthenecessarychangeandalsoclarifiesthebasisforsettingtheSIpumprunoutlimits.Thebasesclarificationdescribeswhytheinjectionlineupismoreconservativethanthesumprecirculationlineup(whentheRHRpumpsareprovidingasuctionpressureboost)forpotentialSIpumprunout.ThisisduetosplittingoftheSI

Attachment1toAEP:NRC:1274Page2trainsduringcirculation,resultinginahighersystemresistancethanwitha-singleSIpumpinjectingtoallfourreactorcoolantloops.DescritionofAmendmentReuestTechnicalspecification4.5.2.h(SIsystemsinglepump)isbeingchangedtorequirethemaximumpermittedrunoutflowrateforaSIpumpberestrictedto675gpmunlessthepumpisindividuallyqualifiedtoahigherflowrateofupto700gpm.Currently,T/S4.5.2.hrecognizesarunoutflowrateof700gpmforeachoftheSIpumps.Thebasisisbeingclarifiedtodescribewhytheinjectionlineupduringflowbalancingistheminimumresistanceconfigurationforrunoutconsiderations.JustificationforAmendmentTheproposedamendmentisnecessarytocorrectatechnicaldiscrepancyintherunoutflowlimitforsafetyinjectionpumpsthat,havenotbeenspecificallytestedtothelimitcurrentlyallowedbyT/S4.5.2.h.BasisforNoSignificantHazardsDeterminationInaccordancewith10CFR50.92,thisproposedamendmentdoesnotinvolveasignificanthazardconsiderationifitdoesnot:1)Involveasignificantincreaseintheprobabilityorconsequencesofanaccidentpreviouslyevaluated.TheproposedreductionintheSIpumprunoutflowdoesnotincreasetheprobabilityofoccurrenceofanypreviouslyevaluatedaccidentbecausetheSIpumpsarenotconsideredtobeaccidentinitiators.Inaddition,flowbalancingperformedatCookNuclearPlanthasproventheabilitytodelivertheminimumT/Sflowof300gpmtoeachpairofcoldleginjectionpointswithoutexceedingthe675gpm(or700gpm)pumprunoutlimits.Therefore,theemergencycorecoolingsystemperformanceobjectivesof10CFR50.46arenotimpactedandthischangedoesnotinvolveasignificantincreaseintheconsequencesofanaccidentpreviouslyevaluated.2)Createthepossibilityofanewordifferentkindofaccidentfromanyaccidentpreviouslyevaluated.ThisproposedchangeimposesagenericlimitonmaximumallowableflowforuntestedSIpumps.Nophysicalsystemchangesorchangesinoperatingmodesarebeingmadethatcouldintroducenewordifferentkindsofaccidentsfromthosepreviouslyevaluated.Asdiscussedin(1)above,theSIpumpsarenotconsideredaccidentinitiators,andthisstatusisnotaffectedbythechangetotheSIpumprunoutlimits.

Attachment1toAEP:NRC:1274Page33)Involveasignificantreductioninamarginofsafety.ThischangereflectsareducedmaximumsinglepumpflowtobeobservedduringflowbalancingoftheSIsystem.FlowbalancetestingatCookNuclearPlanthasdemonstratedtheabilitytomeetSIflowrequirementswhilemaintaininganadequatemargintotherevisedlowerrunoutlimitsbeingproposedbythissubmittal.BecausetheminimumrequiredSIflowdeliveredtothecorehasnotbeenreducedbythischange,thechangedoesnotinvolveareductioninamarginofsafety.Basedonthepreceding,theevaluationconcludedthattheproposedchangetotheSIpumprunoutlimitsdoesnotinvolveasignificanthazardsconsiderationasdefinedin10CFR50.92.

ATTACHMENT2TOAEP:NRC:1274CURRENTPAGESMARKED-UPTOSHOWPROPOSEDCHANGESTOTHEDONALDCDCOOKNUCLEARPLANTUNITS1AND2TECHNICALSPECIFICATIONSAFETYINJECTIONPUMPRUNOUTFLOWLIMITS UNITNO.1