ML17325A262

Submits Addl Info Re TMI Action Item II.D.1 on Relief & Safety Valve Testing,Per Dl Wigginton 870306 Request.All 46 Pipe Supports in Units Reviewed & Found to Meet Stress Limits for Faulted Conditions & Repipe Code Verified

ML17325A262
Person / Time
Site:	Cook
Issue date:	08/14/1987
From:	ALEXICH M P INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:	MURLEY T E NRC, NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
References
TASK-2.D.1, TASK-TM AEP:NRC:0585J, AEP:NRC:585J, NUDOCS 8708210588
Download: ML17325A262 (7)

Text

REGULATOINFORMATIONDISTRIBUTIONSTEM(RIDS)ACCESSIONNBR:8708210588DOC.DATE:87/08/14NOTARIZED:NODOCKET0FACIL:50-315DonaldC.CookNuclearPoeerPlantiUnitiiIndiana00500031550-316DonaldC.CookNuclearPacerPlantiUnit2iIndiana505000316AUTH.NAMEAUTHORAFFILIATIONALEXICHORM.P.Indiana8cMichiganElectricCo.RECIP.NAMERECIPIENTAFFILIATIONMURLEYiT.E.DocumentControlBranch(DocumentControlDesk)

SUBJECT:

SubmitsaddiinforeTMIActionItemII.D.1onrelief8csafetyvalvetestingsperJDolan870306request.DISTRIBUTIONCODE:A046DCOPIESRECEIVED:LTRENCLSIZE:TITLE:ORSubmittal:TMIActionPlanRgmtNUREG-07375NUREG-0660NOTES:REClPIENTIDCODE/NAMEPD3-3LAWIGGINGTONiDINTERNAL:AEOD/DQAARM/DAF/LFMBNRR/DEST/*DSNRR/DREP/RPBOGC/HDS1RESDEPYGIEXTERNAL:LPDRNSICCOPIESLTTRENCL101111010110111111RECIPIENTIDCODE/NAMEPD3-3PDAEOD/DSP/TP*BNRR/DEBT/ADENRR/DREP/EPBN/ILRBEGFE01NRCPDRCOPIESLTTRENCL551110111111TOTALNUMBEROFCOPIESREQUIRED:LTTR22ENCL17 0I INDIANA8MICHIGANELECTRICCOMPANYP.O.BOX16631COLUMBUS,OHIO43216August14,1987AEP:NRC:0585JDonaldC.CookNuclear'lantUnitNos.1and2DocketNos.50-315and50-316LicenseNos.DPR-58andDPR-74ADDITIONALINFORMATIONREGARDINGTMIACTIONITEMII.D.1ONRELIEFANDSAFETYVALVETESTINGU.S.NuclearRegulatoryCommissionAttn:DocumentControlDeskWashington,D.C.20555Attn:T.E.Murley

DearDr.Murley:

Thepurposeofthisletteranditsattachmentistoprovidetheadditionalinformationrequestedbyyourstaff,regardingTMIActionItemII.D.1onreliefandsafetyvalvetesting.TherequestwasmadeinaletterfromD.L.WiggintontoJohnDolan,datedMarch6,1987,andinvolvedadditionalinformationconcerningverificationoftheREPIPEcodeandstressesonpipesupportsinafaultedcondition.InresponsetothequestiononverificationoftheREPIPEcode,averificationreportwasrequestedfromControlDataCorporation(CDC).TheverificationreportisonfileinourofficesandwillbetransmittedtoyoubyGDC.Inresponsetothequestiononpipesupportstresses,wereviewed46pipesupportsinUnits1and2.All46supportswerefoundtomeettheallowablestresslimitsforthefaultedcondition.Amoredetailedresponsetothesequestionsiscontainedintheattachmenttothisletter.ThisinformationissupportedbyANSI/MSSReportSP-58,"PipeHangersandSupports--Materials,DesignandManufacture."ThisdocumenthasbeenpreparedfollowingCorporateprocedureswhichincorporateareasonablesetofcontrolstoinsureitsaccuracyandcompletenesspriortosignaturebytheundersigned.S70aaiosaaS70alePDRADQC~050003i5PPDRVerytrulyyours,IM.P..AlexiVePresientcmAttachmentcc:JohnE.DolanW.G.Smith,Jr.-BridgmanR.C.CallenG.BruchmannG.CharnoffNRCResidentInspector-Bridgman,A.B.Davis-RegionIIIL.Goodwin-CDC AttachmenttoAEP:NRC:0585JResponsetoAdditionalQuestionsConcerningReliefandSafetyValveTesting

Attachment1toAE.RC:0585JInaletterfromD.L.WiggintontoJohnDolan,datedMarch6,1987,theNRCrequestedadditionalinformationregardingreliefandsafetyvalvetesting.TheNRCquestionscontainedintheMarch6letterandourresponsetothosequestionsareasfollows:Question1:"ThelicenseewaspreviouslyrequestedtoprovideverificationthattheREPIPEprogramproducesaccuratefluidforceswhenusedinconjunctionwithRELAPfordischargetransientsofthetypeoccurringinaPWRoverpressureprotectionsystem.ThelicenseerespondedbystatingthatverificationofREPIPE'scapacitytogenerateforcehistoriesisprovidedbytheControlDataCorporation.Thisstatementdoesnotinitselfprovideevidenceofverificationfortheprogram.Therefore,provideaverificationofthisprogrambycomparingcalculatedforceswithmeasuredforcesfromtheEPRItestdataorothersimilarverification."~Resonse;VerificationthattheREPIPEprogramproducesaccuratefluidforceswhenusedinconjunctionwithRELAP5MOD1fortheD.C.CookPlantUnits1and2pressurizeroverpressureprotectionsystemdischargetransientsisprovidedintheREPIPEVersion3.10VerificationReportRev.1,datedJune1987,submittedbyControlDataCorporation.TheproprietaryreportisonfileattheAmericanElectricPowerServiceCorporationofficesinColumbus,Ohio,andisavailableforyourreview.WealsounderstandthatCDCwillsoonmailyouacopyofthisreport.Ms.LindaGoodwin,QualityAssuranceManagerforCDC,hasadvisedusthatthereportwillbemailedsoon.uestion2:"Thelicenseehasprovidedloadcombinationsthatwereusedtoevaluateadequacyofthepipingandpipesupportsfornormal,upset,andemergencyconditions.TheloadcombinationsusedforthesethreeserviceconditionsareinaccordancewithFSARrequirementsandrecommendationsoftheEPRIPWRSafetandReliefVal~eTestProramGuideforAlicationofValveTestProramResultstoPlant-SecificEvaluations,July1982.Thelicensesubmittalsdonot,however,providealoadcombinationforafaultedconditionwherebyloadsforaworstcaseblowdownarecombinedwithloadsforaworstcaseseismicevent.SuchaloadcombinationisspecifiedintheFSAR(Chapter4,Section4.3.1)andintheEPRIGuide.BasedonthestressvaluespresentedintheTeledynereportsincludedinthelicenseesubmittals,aloadcombinationofDeadweight+Design+DesignBasisEarthquake+SafetyValveDischarge<2.4Shcanbeperformedforpipestressesandtheresultingstressesforthisfaultedconditionareacceptable."Theinformationsuppliedbythelicensee,though,doesnotpermitperformingasimilarloadcombinationforafaultedconditiononthepipesupports.Therefore,determineanallowablestressforpipesupportcomponentsforafaultedconditionandperformaloadcombinationsuchasNormal+DesignBasisEarthquake+SafetyValveDischargeinwhichtheresultingstressesarecomparedtotheestablishedallowables."

~~eAttachment1toAEP.C:0585JPage2~Resense:WehaveperformedaloadcombinationforafaultedconditiononthepressurizerSV/PORVdischargepipesupportsbycombiningloadsforaworse-caseblowdownwithloadsforaworse-caseseismiceventandevaluatedtheresultingcomponentstressesagainstestablishedallowables.TwentyUnit1andtwenty-sixUnit2pipesupports(excludingspringsupports)wereevaluatedusingthefollowingfaultedloadcombinationandallowablestresslimits:FaultedLoadCombination:SVTransientSVTransientWeightLoadThermalLoad+SVTransient2DBE$2ShockLoadLoadJsAllowableStressLimits:Theloadsummationshallnotproducesupportcomponentstressesgreaterthan133%ofthatpermittedby(a)and(b)notedbelow,or0.9Sy,or0.7Su,whicheverisgoverning.(a)"SpecificationfortheDesign,Fabrication,andErectionofStructuralSteelforBuildings(EffectiveNovember1,1978),"ManualofSteelConstruction,EighthEdition.AmericanInstituteforSteelConstruction(AISC).(b)ManufacturersStandardizationSociety(MSS)-SP-58,"PipeHangersandSupports--Materials,DesignandManufacture."Results:Allforty-sixsupportswerefoundtomeettheallowablestresslimitsforthefaultedcondition.>Theminustermisusedforselectingtheworst-caseloadingifthesumofthefirsttwotermsisnegative.