ML17331A797

Forwards Response to 810210 Generic Ltr 81-14 Re Seismic Qualification of Auxiliary Feedwater Sys.Sys Is Designed, Constructed & Maintained to Withstand Safe Shutdown Earthquake

ML17331A797
Person / Time
Site:	Cook
Issue date:	08/28/1981
From:	HUNTER R S INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:	DENTON H R Office of Nuclear Reactor Regulation
References
AEP:NRC:00486A, AEP:NRC:486A, GL-81-14, NUDOCS 8109110262
Download: ML17331A797 (6)

Text

REGULATORY lvFORMATION OISTRIOJTION SYTEI(RIOS)ACCESSIOV VoR:8109FACI':50315Oona50-316'3onaAUTH.NAWE HUNTERsR~STRECIP~VAIEOEVTOVe9~Ro110262OOC~DATE;91/08/28VQTAPIZED:YFSld.Coo<NuclearPowerP>antqUnitipIndianala".CooNNuclearPowerPlant~Unit2iIndianaAUT93%A}.F1LIATIONIndianaRMacniaanElectricCo.RE:IoIE>>'IIAFFILIATIOVOfficeofnuclearReactorRegulationi Director'30"KET0550031SUBJ=CT:Forwardsrespoqualification constructed 8earthquake, 9ISTRI8JlI'JNC3OE:A001TITL=:general9istribunseto810210GenericLtr8114reseismicofauxiliary feedwater sys.Sysisdesianeor

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LTTRENCL INDIANALMICHIGANELECTRICCOMPANYP~O.BOX18BOWLINGGREENSTATIONNEWYORK,H.Y.10004August28,1981AEP:NRC:00486A DONALDC.COOKNUCLEARPLAiVTUNITNOS.1AND2DOCKETiVOS.50-315and50-316LICENSENOS.DPR-58andDPR-74SEIS<ifIC QUALIFICATION OFAUXILIARY FEEDWATER SYSTEMS:GenericLetter81-14Hr,HaroldR.Denton,DirectorOfficeofViuclearReactorRegulation U.S.NuclearRegulatory Commission Washington, D.C.20555'.>l"W%/aNtwvu<i<wcQN.~cc45ANMC'h

DearNr.Denton:

Thisletteranditsattachment provideourresponseto~ifr.D.G.Eisenhut's GenericLetterVio.81-14datedFebruary10,1981whichweoffic'ally received.onJune18,1981.,-TheCookPlantAuxiliary Feedwater Systems(AFS),withtheexception oftheCondensate StorageTanks(CSTs)anditsassociated piping,aredesigned; constructed, andmaintained towithstand aSafe.Shutdown Earthquake (SSE)asdetermined utilizing theanalytical, testingandevaluation methods,andtheacceptance criteriaconsist-entwithothersafety-grade systemsoftheplant.Thecomponents andequipment listedintheAttachment tothisletterhavebeenseismically qualified eitherbytestingoranalysis.

Whenqualified byanalysistheseismicinputiseitheraspecified acceleration, oraresponsespectrumthatboundsthemostsevereresponsespectrumfortheplant,ortheDesignBasisEarthquake (DBE)responsespectrumforthefloorelevati.on wheretherespective component orequipment isinstalled.

Forthosecomponents qualified byanalysis, theloadcombinations includethestressesduetotheDBE,deadweightand,forpressureretaining parts,theoperating pressure.

Theseresulting stresseswerethencomparedtotheallowable stressesfromtheappropriate codes.Forequipment quali-fiedbytesting,acceptance isdetermined bytheoperability oftheequipment subsequent tothetest.Certainsafetyrelatedswitchgear cabinetsandmotorcontrolcenterswerefoundtohaveinsufficient anchorage topreventover-turningduringtheDBE.AsdetailedinAmericanElectricPowerServiceCorporation's August14,1981andAugust17,1981letterstoyou,temporary bracingwasinstalled.

Thepermanent modification of81091102b2 810828PDRADOCK05000315PPDR theanchorage hasnowbeencompleted.

Asindicated inourAugust17,1981letter,someoftheequipment anchorage whichwasmodifiedisbeyondthescopeofGenericLetter81-14.SeismicrelatedIEBulletins 79-02,79-04,79-07,79-14,and80-11,andIEInformation Notice80-21havebeenreviewedforapplic-abilitytotheAFS.Allareapplicable totheCookPlantAFSexceptforIEBulletin79-04.Allworkapplicable totheAFSforIEBulletins 79-02and79-07iscomplete; workapplicable totheAFSforIEBulletin79-14and80-11ispresently beingcompleted; IE'nformation Notice80-21iscurrently underreview.Concerning theCST's,theyareseismicclassII,andaredesignedtowithstand theOperating BasisEarthquake (OBE).IntheunlikelyeventofaDBEwhichmayresultindamagetotheCST's,procedures existandareinplaceattheCookPla'nttos~itchAFSpumpsuctiontotheessential servicewater(ESW)system,whichisSeismicClassI.Thisprocedure wasdescribed indetailinour'lettertoyoudatedMarch28,1980,No.AEP:NRC:0307A.

TheSafetyEvaluation ReportattachedtoMR,S.Varga'sletterofOctober6,1980acceptedthatprocedure forswitching totheESWSystem.Therefore, itisnotnecessary towalkdowntheCST's.Nevertheless, thenon-seismically qualified pipingconnected totheCST'shasbeenwalked-down andnodeficiencies wereidentified.

Verytrulyyours,R.S.HunterVicePresident cc:JohnE.Dolan-ColumbusR.C.CallenG.CharnoffR.W.Jurgensen D.V.Shaller-BridgmanJoeWilliams, Jr.NRCRegionIIIResidentInspector

-Bridgman STATEOFNEWYORK))COUNTYOFNEWYORK-)R.S.Hunterbeingdulysworn,deposesandsaysthatheistheVicePresident ofLicenseeIndiana6MichiganElectricCompany,thathehasreadtheforegoing responsetoGenericLetter81-14andknowsthecontentsthereof;andthatsaidcontentsaretruetothebestofhisknowledge andbelief.Subscribed sndsworntobeforemethis~deyof1981.otaryPublicGoQQ'pl.Q'Jr7rIlholryPu'blc'reor2er(orktlo.31-'643431r!uaiified iollevrYo'kCounty><Cammissica SpiresMarch30,19.~~

ATTACHMENT SEISMICALLY QUALIFIED AUXILIARY FEEDWATER SYSTEMCOMPONENTS COMPONENT METHODOFQUALIFICATION (A=ANALYSIS;T=TEST)

MotorDrivenAuxiliary Feedwater PumpsTurbineDrivenAuxiliary Feedwater PumpsStrainers Instrumentation AAInstrument TubingandSupportsValvesandValveSupportsPipingPipeHangersConduitsCableTroughsTerminalBlocksMotorControlCentersA/TAIAA/TDCValveControlCenters"N"TrainBatteryCharger"N"TrainBatteryandRacksSwitchgear SwitchesRelaysContactors COMPONENT METHODOFQUALIFICATION (A=ANALYSIS'T=TEST)

Auxiliary Feedwater PumpMotorsA4KVAirCircuitBreakersDCDistribution Cabinet(TrainN)Auxiliary Feedwater PumpEnclosures A