ML17037B534

Nine Mile Point Unit 1 - Letter Regarding NRC Staff Review of Addendum 3 to the Mark I Containment Evaluation Short Term Program Report Which Was Submitted on 08/17/1976 by GE Company on Behalf of the Mark I Owner'S Group

ML17037B534
Person / Time
Site:	Nine Mile Point
Issue date:	09/14/1976
From:	Lear G Office of Nuclear Reactor Regulation
To:	Rhode G K Niagara Mohawk Power Corp
References
Download: ML17037B534 (8)

Text

r,'SEP14576DocketNo.50-220-NiagaraMohawkPowerCorporationATTN:Mr.GeraldK.RhodeVicePresident-Engineering300ErieBoulevard1/estSyracuse,HewYork13202Gentlemen:Dis&rbutionNRCPDRLocalPDRORBk3FileKGollerTJCarterOELDOI8E(5)GLearJGuibertCParrishDEisenhutTBAbernathyJRBuchanan'ACRS(16)DRossTheNRCstaffhascompleteditsreviewofAddendum3totheHarkIContainmentEvaluationShortTermProgramReport(NEDC-20989-P)whichwassubmittedtotheNRConAugust17,1976byGeneralElectricCompanyonbehalfoftheMarkIOwner'sGroup.TheAddendum3reportdescribesthemethodsusedtodeterminetheventheaderandventpipepoolswellimpactloadswhichwereconsideredinthe"PlantUniqueAnalysisReportForTorusSupportSystemandAttachedPipingForNineMilePointNuclearPowerStation"datedJuly26,1976.'lfehaveconcludedthatthemethodsusedtodetermineplantuniquepoolswellvelocitiesfromthereferenceplantvelocity,asdescribedinAddendum3,are,acceptable;however,wehavefurtherconcludedthatthedeterminationofvent-headerandventpipeimpactloadsusingimpulse/velocitydataobtainedfrom1/12scaletestfacilitystraingagemeasure-mentsisnotacceptablesincewebelievethesestraingagemeasurementsdomotprovideanadequatearidreliabledatabase.Consequently,werequirethatyouprovideasupplementtotheNineMilePointUnitNo.1plantuniqueanalysisreportwhichconsidersventheaderandventpipeimpactloadswhichhavebeendeterminedusingtheimpulse/velocityrelationshipderivedfromtheMarkIII-PressureSuppressionTextFacility(PSTF)data.Inorderforus'ocompleteourreviewoftheMarkIContainmentShortTerm-Programinatimelymanner,werequirethatyouprovideyourwrittenresponse'.,'yOctoberl.1976.Onesignedoriginaland39copiesofyourresponsewillbenecessary.OPPICS~SURNAMR~OATS~FormAEC.S18(Rer.9-Sj)hEChf02404UOVRRNMSNT.'PRINTINOOPXICKIIOT4424!44 H~W",We)1ff!4~'uukkIJ\rI~1~4I)1'r~~334IIIIt,)lIkrr~r1!'44It4It4~rk4!1I~,W'4II4 NiagaraMohawkPowerCorporation-2-SEPj.<816'IIfyouhaveanyquestionsregardingtherequestedinformation,wewouldbepleasedtomeetwithyou.lSincerely,OriginalsignedbyGeorgeLear,Chief'peratingReactorsBranch83DivisionofOperatingReactorscc:ArvinE.Upton,EsquireLeBoeuf,Lamb,Leiby8MacRae1757NStreet,-N.W,Washington,D.C.20036AnthonyZ.Roisman,EsquireRoisman,KesslerandCashdan1712NStreet,N.W.Washington,D.C.20036OswegoCityLibrary120E.SecondStreetOswego,NewYork131260843CPa'sh9//OPPICE~SURNAME~DATE~PofsehEC-318(Rev.9.$3)CM0240.....O.RB:.8.3..............Gl.eaI:...9/I.gl.Z6..JGuizt.;.f,9//gjI,>64U,SIOOVERNMENTPRINTINOOPPICEIIST4520ISS e~A~dli(~'C DistributionSEPl4I9764-..=-DocketORBP3LocalPDRNRCPDRKGo1lerTJCarterOELDOI8IE(5)GLearJGuibertCParrishDEisenhutTBAbernathyACRS(16)DRossDocketNo.50-220Gentlemen:Niagarat5ohawkPowerCorporationATTN:ter.GeraldK.RhodeVicePresident-Engineering300ErieBoulevardWestSyracuse,HewYork13202InaJune18,1976letterfromter.E.A.Ilughes,GeneralElectricCompany(GE),toftr.V.StellooftheNRCstaff,GE!providedresponsesonbehalfoftheHarkIOwner'sGrouptoNRCstaffquestionsontheMarkIContainmentEvaluationShortTermProgramfinalreport.TheresponsetoContainmentSystemsBranch(CSB)guestionNo.9providedinformationregardingpotentialdamagetocriticaltorusinternalstructuresandcomponentsfrommissilesgeneratedasaresultofpost-LOCApoolswellimpactloadsonthesolidcatwaTk,insidethef<inetiilePointUnitNo.1(t<HP-1)suppressionpool(torus).InyourletterofJuly23,1976youstatedthat,althoughcontainmentintegritywouldbemaintainedforthemostprobablemissileimpactorientationsandtargetareas,NtlPCwouldremovethesolidcatwalkatNt<P-1andreplaceitwithagratingcatwalkduringthescheduledSpring1977refuelingoutageinordertoalleviatethepotentialfordamage.InordertocompleteourreviewandevaluationofthecontinueduseofasolidcatwalkatHtlP-1untilSpring1977,theHRCstaffrequiresthatyouprovideastudywhichdeterminestheprobabilityoflossofcontain-mentintegrityatHMP-1duetoapostulatedLOCAandsubsequentcatwalkmissiledamage.ThestudyshouldconsidertheprobabilityofapipebreakresultinginaLOCAwhichinturnresultsinthefailureofthesolidcatwalk.Itshouldalsoconsidertheorientationsofthecatwalkmissileswhichresultinfailureofthetoruswall,ventpipeandbellowsassembly.Sincemuchofthecatwalkmayfail.thestudyshouldincludetheeffectsofmultiplemissiles.InordertocompleteourreviewoftheMarkIContainttletftShortTermProgi.aminatimelyfashion,werequirethattheabovementiedinformationbeprovidedbyOctober1,1976.Onesignedoriginalandopiesofyourresponsewillbenecessary.ORSICd~SURIrANd~OATS+FormAEC-318(RST.9.53)hZCM0240kU;SIOOVdRNMdNTPRINTINOOFFICdlIST4SdoISS bf4IIItIbI4II~4IIb~~hrbf~-4rII~UF~,4.i,4hbIIbif'llII~4I'4ht1Ir~IblFIFFb,fIIf(l,UII4'il.IUFUh4I~444II4f~'4fII',IfIIIII4\~I44llV.

4Niagaraf<ohawkPowerCorporation-2-SEP14$76Ifyouhaveanyquestionsregardingtherequestedinformation,wewouldbepleasedtomeetwithyou.Sincerely,Origina(signgi,yGeorgeLear,ChiefOperatingReactorsBranch83DivisionofOperatingReactorscc:ArvinE.Upton,EsquireLeBoeuf,Lamb,Leiby5HacRae1757NStreet,H.W..Washington,D.C.20036AnthonyZ.Roisman,'squireRoisman,KesslerandCashdan1712NStreet,N.W.Washington,D.C.,20036OswegoCityLibrary120E.SecondStreetOswego,NewYork13126RB83......CRa.....,9...IJ'.orrIcc3rSVRNAMC3r'ATc3rPoImhEC-318(ReT.9-S3)hZCM0240ORB0'3ORB8J.Gui.bert.:mj..Wj..'ll.7.6.........0U$'OOVCRNMCNT.PRINTINOOrrICCIIST452d1dd 41>ela'1l8R