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DEPTNOFILINGCOOKGILBERTASSOCIATES,IN~EHGIHEERSAHD'COHSU?.TAN~READING,PADEPARTMENTNAMKPR0JKCTNAMEGinnaStationWoOeNUMBERPAGKSUBJECT~%EtCJEWS.Figure.*3I~IORIGINAT0-7.nl.DATE7ZSWVKRIFIKRDATEw~I'1~tv41~v1,h1~C"h1I~hy~WiDAJ4QaRfmg'0~II'.I111~~g~Os3~4,I11~~~1IIrj$7I,'3P+'Pq...g.M+iP+jti)"(6Wl~'S11~1II'ISEE'CAlgooJ4htpjap~;'2,0P/MISCt7:11I-8I4i1~.L.~I1r~II'1Ii!1OIIOCIIIIIXCl1~'IPROPRIETARYINFORMATIONOFGILBERTASSOCIATES,INC.-FORINTERNALUSEONLYI~1GAI350REV.3-77  
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Revision as of 15:36, 18 May 2018

Forwards Supplemental Response to IE Bulletin 79-02 Re Pipe Support Base Plate Designs Using Concrete Expansion Bolts. Submits Info Re Testing & Replacement Program,Base Plate Flexibility & Replacement Program
ML17244A779
Person / Time
Site: Ginna Constellation icon.png
Issue date: 07/26/1979
From: WHITE L D
ROCHESTER GAS & ELECTRIC CORP.
To: GRIER B H
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
NUDOCS 7908230107
Download: ML17244A779 (18)
v • d • e


Text

QPI,!!!!!!!ililusisii!ZROCHESTERGASANDELECTRICCORPORATION~89EASTAVENUE,ROCHESTER,N.Y.74649I.COND.WHITE.JR.VICEPRESIDENTTEI.EPHONEAREACOOEllS546.2700July26,1979Mr.BoyceH.,Grier,DirectorU.S.NuclearRegulatoryCommissionOfficeofInspectionandEnforcementRegionI631ParkAvenueKingofPrussia,PA19406Subj'ect
SupplementalResponseIEBulletinNo.79-02PipeSupportBasePlatesDesignsUsingConcreteExpansionAnchorBoltsR.E.GinnaNuclearPowerPlant,UnitNo.1DocketNo.50-244

DearMr.Grier:

OnJuly6,1979weprovidedyouwitharesponsetothesubject,IEBulletin.DuringsubsequentdiscussionswithmembersoftheRegion1,IEHeadquarters,andDORStaffwehavebeenrequestedtoprovideadditionalinformationconcerningourinitialresponse.Enclosedisacopyoftheinformationrequested.Verytrulyyours,EnclosurerL.D.Whi,Jr.zc:U.S.NuclearRegulatoryCommissionOfficeofInspectionandEnforcementDivisionofReactorConstructionInspectionWashington,DC20555T.908S30Q7 0

RevisedResponsetoIEBulletinNo.79-02PipeSupportBasePlateDesignsUsingConcreteExpansionAnchorBoltsR.E.GinnaNuclearPowerPlant,UnitNo.1DocketNo.50-2441.~sstemsa)Thefollowingisalistof'hesystems,andportionsofsystems,includedinPhase1ofourtestingandreplace-mentprogram;andthenumberofsupportsineach.ThesesystemsaretheessentialSeismicCategoryIsystemsrequiredforreactorcoolantsystemintegrityandachievingasafe.shutdownconditionfollowingaseismicevent.Inaddition,thelistincludesthosesystemsnecessarytomitigatetheconsequencesofadesignbasislossofcoolantaccident.ThislistofsystemshasbeendevelopedforSystematicEvaluationProgramTopicsVII-3,"SystemsRequiredforSafeShutdown";andIII-1,"ClassificationofStructures,Components,andSystems".ReactorCoolantSystemMainSteamMainFeedwaterStandbyAuxiliaryFeedwaterSafetyInjectionSystemResidualHeatRemovalContainmentSprayChemicalandVolumeControlSystemComponentCoolingSystemServiceWaterSteamGeneratorBlowdownTotal10019150151017182b)Thefollowingisalistofthesystems,andportionsofsystems,includedinPhase2ofourtestingandreplace>>'ent,program.ThesesystemsaredesignatedSeismicCategoryIbutarenotrequiredforreactorcoolantsyst:emintegrity,achievingasafeshutdownconditionfollowingaseismicevent,ormitigatingthecon-sequencesofalossofcoolantaccident.AuxiliaryFeedwaterBoricAcidSystemChemicalandVolumeControlSystemServiceWaterTotal21105945c)Bothphasesofourtestingandreplacementprogramincludeloadbearingpipesupportbaseplatedesignsusingconcreteexpansionanchorbolts.Theprogramhasbeenrevisedtoincludeanchorboltsinloadbearingpipesupportbaseplatedesignsonall2@inchandcritical2inchnominalsizepipingsystemsontheabovelists.

2.BasePlateFlexibilita)AsindicatedinourinitialresponseonJuly6,1979,itwasnotpossibletoreanalyze,usingflexibleplateassumptions,thebaseplatesonallpipesupportsinourtestingandreplacementprogrampriortoitsinitiation.,Therefore,arepresentativesampleof10typicalpipe'support;baseplateshasbeenanalyzed,usingrigidplateassumptions,forbothexistingandreplacementdesigns.TheresultsoftheseanalysesareshowninTable1.Inallcases,boltcapacityhasbeenincreasedinthereplace-ment;designs.In2cases(SWAH-19andSWAH-23),additional.analyses,usingflexibleplateassumptions,havebeenperformed.Theseanalysesshowminimumfactorsofsafetyof5.00and5.35,respectively,forthereplacementdesigns.Thedesignfactorofsafetyforthewedgetypeanchorboltsused,inthereplacementdesignsis4.00.I'tisourdeterminationthatthedesignboltcapacitiesprovidesufficientmarginsofsafetytoaccountforanyloadincreasesduetoflexibility.3.b)Ingeneral,pipesupportsatGinnaStationwithbaseplatesusingconcreteexpansionanchorboltsareofsimilardesign.Figures1through5showthedesignofthesupportsdescribed,above.TheyaretypicalofthetypeusedinSeismicCategoryIsystemsthroughouttheplant.ScheduleTheschedulefortheanchorbolttestingandreplacementprogramdescribedinourJuly6,1979responsehasbeenaccelerated.ThetestingandreplacementofallanchorboltsininaccessibleandaccessiblesupportsincludedinPhase1willbecompletedpriortoAugust1,1979.Phase1includesallthesystemslistedinparagraph1(a)above.ThisrevisedscheduleisconsistentwithourplansforreturningtheplanttopoweroperationfollowingthepresentoutagetoperformtheinspectionsandrepairsrequiredbyIEBulletin79-13.

'I TABLE1SupportNo.BoltLoadExistingDesignBoltCapacityFactorof-SafetyBoltLoadReplacementDesignBoltCapacityFactorofSafetyTensionShearTensionShearTensionShearTensionShearACH"106ACH-118SWAH-19SHAH-23SHAH-24SWCH-63SWCH-73SWCH-74ACH-100SWAH-37750241293316114352963134519728956018014026204992207285576072855760268802688026880268802688026880728557607285576072855760728557607285576097.011.95.86.29.41121.0399.0520.027.89.475024129314529571257-8978375970190140340~126455250141001519514100151951410015195141001519514100,1519511550151951155015195115501519514100151951410015195188.027.56.06.810.11650.0608.0825.030.920.5

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