ML17335A273

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Rev 0 to ST-307, Structural Evaluation of DC Cook Unit 2 Sgla Package.
ML17335A273
Person / Time
Site: Cook American Electric Power icon.png
Issue date: 08/21/1998
From: BOLYARD V
CHEM-NUCLEAR SYSTEMS, INC.
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Shared Package
ML17335A271 List:
References
ST-307, NUDOCS 9810140052
Download: ML17335A273 (20)


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CHEM-NUCLEARSYSTEMS,LLC.140STONERIDGEDRIVECOLUMBIA,S.C.29210DESIGNDOCUMENTCOVERSHEETDOCUMENTIDNUMBER:ST-307REVISIONNUMBER:0PROJECTNUMBER:46628SECURITYSTATUS:PROPRIETARYNON-PROPRIETARY~xPERIOD:'ifeofthePro'ect+1earTITLE:StructuralEvaluationoftheD.C.CookUnit2SGLAPackaePREPAREDBY:DATE:81998TITLE:PrinciEnineREVIEWEDBY:DATE:TITLE:SeniorPro'ectEnineerREVISIONNOTES:CK~lmOILEOCOPYIIO.DOCUMENTCONTROLReceivedBy:DocumentDatedFrom:VerificationtoIndexBy:StorageShelfLocation:To:O'PDat'.Sr98ioie00SaVaioOSPDRADQCK050003ihP"PDR 04I"V,'lelIa'O0~4'"k4I CHEM-NUCLEARSYSTEMS,INC.140STONERIDGEDRIVECOLUMBIA,S.C.29210.DESIGNDOCUMENTREVIEWCHECKLISTDesignPackageIdentificationNoDate81998ST-307RevisionNo.ITEMYES1.ADesignInputssuchasdesignbases,regulatoryrequirements,codes,andstandardsareidentifiedanddocumented.1.BEffectofdesignpackageoncompliancewiththeSafetyAnalysisReportorCertificateofComplianceidentifiedanddocumented.2.Revisionnumberscorrectonthelistofdrawings?3.Assumptionsreasonable?4.Appropriateanalysismethodused?5.Correctvaluesusedfromdrawings?6.Answersandunitscorrect'7.Summaryofresultsmatchescalculations?8.Materialpropertiesproperlytakenfromcrediblereferences?9.Figuresmatchdesigndrawings?10.Computerinputcompleteandproperlyidentified'?11.Documentationofallhandcalculationsattached?12.MeetingminutesoftheDesignReview?NotApplicable,Explain1.BThereisnoSARorCertificateofComplianceforthisequipment.7.Resultsarenotsummarized.10.Nocomputeranalysisperformed.12.Nodesignreviewmeetingneeded.IndependentReviewer P~<.rAij"lgcA/VlII>4'h~ttpJn>ate~dIp4n'ipit TitleStructuraEvaluationoftheD:C:CookUnitS.G.L.A.PackaeGale.No.ST-307Rev.0Sheet1of10OBJKCTIVKStructuralevaluationoftheD.C.Cooksteamgeneratorlowerassembly(SGLA)packagetodemonstratethatitsclosuresprovidesufficientstrength.tomaintaintheirintegrityduringthetransportation.INTRODUCTIONAmericanElectricPower(AEP)companyhasreplacedthesteamgeneratorsattheirD.C.CookUnit2facility.Thesteamdomeportionsoftheoldsteamgenerators(OSGs)(Reference1)havebeencut.Thesteamgeneratorlowerassembly(SGLA)packageswillbetransportedtoBarnwellSouthCarolinafordisposal.ThesepackageshavebeenclassifiedasSCO-IIunder49CFRPart173(Reference2).Per49CFR173.427,theSCO-IIclassmaterialsarerequiredtobeshippedusingIP-2packages.BecauseoftheuniquesizeandshapeoftheSGLA,andcontrolledhandlingprocessduringthetransportation,anexemptionfrompackagingrequirementisrequestedfromtheDOT.Adetailedhandlingandshipmentplanisdevelopedandwillbeadheredtoduringthetransportationoftheseassemblies.TheabilityofthisplantoprovideanequivalentsafetyasthatofanSCO-IIobjectshippedinandIP-2packageformsthebasisofthisexemptionrequest.TheSGLAshaveseveralopeningsthathavebeenweldedshutforthetransportation.TheseopeningsandtheircircumferentiallocationsarelistedinTable1andareshowninFigure1.ThedetailsoftheclosureoftheseopeningsareshowninReference3.Thecutendofthesteamgeneratorswereclosedusing3"thickend-platesthatareweldedtothebodyusing3/8"filletwelds.TheseweldsweremadeaccordingtoAEPworkplanbutlackthequalityassurancedocumentation.Therefore,additionalattachmentisprovidedbyspeciallydesignedclipsthatareweldedtothesteamgeneratorbodyandtheendplate.DetailsoftheseclipsareprovidedinReference4.EvaluationsareprovidedinthisdocumentthatshowthatalltheclosuresoftheSGLAhavesufficientstructuralstrengthtomaintaintheirintegrityundertheloadingexpectedduringthetransportation.REFERENCES(1)CNSDrawingNo.C-110-B-46628-001,Rev.1,D.C.CookUnit2,SteamGeneratorGeneralLayout.(2)CodeofFederalRegulationsTitle49Part173.(3)CNSDrawingNo.C-110-B-46628-004,Rev.1,D.C.CookUnit2,SteamGeneratorContainmentDetails.(4)CNSDrawingNo.C-110-B-46628-003,Rev.1,D.C.CookUnit2,SteamGeneratorShearKeyandShieldPlateTie-Bar.(5)AISC,SteelConstnIctionManual,NinthEdition.

TitleStructuravaluation'oftheD:C.CookUnit2.G.L.A.PackaeGale.No.ST-307Rev.0Sheet2of10(6)AARManual,Rev.9,SectionNo.1,GeneralRules,1993.MATERIALPROPERTIESShellsSpecification:ASMESA-516Gr70MinimumYieldStrength,SMinimumUltimateStrength,S~dCddd=38,000psi=70,000psiWeldsSpecification:ASTMA-36MinimumYieldStrength,SMinimumUltimateStrength,S,=36,000psi=58,000psiRodSpecification:E-70xxElectrodesMinimumUltimateStrength,S=70,000psiALLOWABLESTRESSESStressesinthecapsandplugsandtheweldsareconservativelybasedontheAISC(Reference5)allowablevalues.~CCCdAllowablebendingstressAllowableshearstressWelds=0.66S=24,000psi=0.4S=14,400psiAllowableshearstressinfilletwelds=0.3SEVALUATIONOFTHECLOSURES=21,000psiTheclosuresofthesteamgeneratorpackageareevaluatedforthelargestaccelerationthe'ackagemayexperienceduringthetransportation.ThelargestaccelerationthattheSGLAwouldexperienceduringtheentireprocessofshippingandhandlingisduringtherailtransportation.AccordingtothegeneralrulesofAAR(Reference6),theseaccelerationsare3ginthelongitudinaldirection,2ginthelateraldirection,and2gintheverticaldirection.Conservatively, 0II~.lgj*,,0l7 TitleStructuravaluationof"theD:C.CookUnit.G.L.A.PackaeCaic.No.ST-307Rev.0Sheet3of103gaccelerationisassumedtooccurinalldirectionsandtheclosuresareanalyzedforthisloading.Itisalsoassumedthatthemassofthecomponentsusedforclosingtheopeningduringstorage-plates,manways,handholeslid,etc.-applytheinertialoadingtotheclosures.PrimaInlet4OutletNozzleClosuresTheprimaryinletandoutletnozzleclosures(Figure2)aremadeoftwoitems:Item-1:50.5inDia><'/4inthick><26inlong'hell.Itweightis,Wb--~x50Sx025x26x(1/12)x490=293lbsTotalclosureweight=142+293=435say450lbsConservativelyassumethatthecoverplatehasadiaof50.5inandthicknessof2.5in.Then,thecoverplateweight,W=(z/4)F505><2,5x(1/12)x490=1,420lbs,say1,5QQlbsTheinertialoadinadirectionnormaltothe'/4inplatewillbereactedbytheedgeshear.Theshearstressintheplateis:w=3x(450+1500)/(~x505x025)=148psi<<14,400psiTheplateisweldedtotheshellwithafullpenetrationweldwhichwillhavestrengthequaltoorlargerthanthebasemetal.Theweldsbetweentheshellandthenozzleare3/16"filletwhichwilldevelopashearstress,tNcia=3x(450+1500)/(~x50Sx0707x3/16)=278psi<<21,000psiTheinertialoadintheplaneofthecoverplate,willcausebendingandshearloadatthebaseoftheshell.Conservativelyassumingthattheentiremassislocatedattheendoftheshell,thebendingmomentatthebaseoftheshellis:M=3><(450+1,500)><26=152,100in-lbBendingstressintheshell,oba;,s=152,100/[x><(50.5/2)<0.25]=304psi<<24,000psiShearstressintheshell,g=3x(450+1500)/(xx50Sx025)=147psi<<14,400psi

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TitleStructurvaluation.'of,the.D.C.CookUnit.G.L.A.PackaeGale.No.ST-307Rev.0Sheet4of10Shearstressintheweldcausedbybendingmoment,wb~a;,s=152,100/[z>(50.5/2)><0.707X3/16]=573psiShearstressinthecausedbytheshearforce,z<,--3x(450+1500)/(7rx505x0707x3/16)=278psiCombinedshearstress,x=573+278=851psi<21,000psiManwaClosuresThemanwayclosures(Figure3)aremadeoftwoitems:Item-1:28inDia><'/4inthickplate.Itsweightis,W,=(rr/4)x28x0.25x(1/12)x490=44]bsItem-2:28inDia<'/4inthick><6.5inlongshell.Itweightis,Wb--rrx28x0.25x65x(1/12)x490=41ll"Totalclosureweight=44+41=85say100IbsConservativelyassumethatthemanwayhasadiaof28inandthicknessof6.5in.Then,themanwayweight,W=(rr/4)x28<6.5x(1/12)x490=1,135lbs,say1,200lbsTheinertialoadinadirectionnormaltothe'/4inplatewillbereactedbytheedgeshear.Theshearstressintheplateis:x=3x(100+1200)/(rrx28xO25)=177psi<<14,400psiTheplateisweldedtotheshellwithafullpenetrationweldwhichwillhavestrengthequaltoorlargerthanthebasemetal.Thewelds,between.the.shelland-thenozzleare'/4infillet-whichwilldevelopashearstress,tNela=3x(100+1200)/(rrx28x0707x1/4)=251psi<<21,000psiTheinertialoadintheplaneofthecoverplate,willcausebendingandshearloadatthebaseofthe.shell.Conservativelyassumingthattheentiremassislocatedattheendoftheshell,thebendingmomentatthebaseoftheshellis:M=3><(100+1,200)><6.5=25,350in-Ib 0~l.%p5kII"9tWf1 TitleStructuravaluationoftheD:C.CookUnit2.G.L.A.PackaeGale.No.ST-307Rev.0Sheet5of10Bendingstressintheshell,G~gdjgs=25~350/[7t(28/2)0.25]=165psi<<24,000psiShearstressintheshell,q=3x(100+1200)/(zx28x025)=177psi<<14,400psiShearstressintheweldcausedbythebendingmoment,trna'=25,350/[R><(28/2)X0.707><1/4]=233psiShearstressintheweldcausedbytheshearforce.vac~r=3x(100+1,200)/(itx28x0707x1/4)=251psiICombinedshearstress,x=233+251=484psi<21,000psiHandholeBlowdownShellDrainandWaterLevelNozzleClosuresTheseclosureshavethesamedesigndetailsasthemanwayclosures.Sincetheyaremuchsmallerinsizethanthemanwayclosure,thestressescalculatedforthemanwayclosureenvelopthestressesintheseclosures.EndlateClisEightclips(Figure4),inadditiontothe3/8"filletweldaroundthecircumferenceholdtheendplatesoftheSGLAs.Theseclipsaredesignedtoproviderestrainttotheendplateagainst3gaccelerationinalldirectionswithoutrelyingontheendplatetosteamgeneratorweld.Theendplatesare176indiameter,3inthickthatweigh,Wp=z/4><176><3><490/12=20,696lbssay21,000lbsTheeightclipssharetheinertialoadnormaltotheplatesurfaceequally.Therefore,loadoneachclipis:P=3X21,000/8=7,875Ibs TitleStructuravaluationoftheD.C.CookUnit.G.L.A.PackaeGale.No.ST-307Rev.0Sheet6of106"6"vltreessreeoonlsreoseesThisloadcausestheshearofsectionAA.Theaverageshearstressoverthissectionis:<=7,875/(6xl)=1,313psi<<14,400psiTheweldsonthehorizontalendreacttothisload.Assumingthatonlytheweldlegsparalleltotheloadreacttoit,theshearstressintheweldis:g,,i<--7875/(2x8x0Sx0707)=1,392psi<<21,000psiTheinertialoadparalleltotheplaneoftheendplateisassumedtobereactedbyonlytwoclipsthatareparalleltothedirectionoftheload.Inthiscasetheloadingontheclipsareasfollows:6"6"utforesereeooneoreeseese/2SorersreeoontoreesneesTheloadingoneachclipis:P=3x21,000/2=31,500lbs I~,~~4)IIIl-'%l~,~

TitleStructuralvaluationoftheD.C'.CookUnit2.G.L.A.PackaeGale.No.ST-307Rev.0Sheet7of10ShearstressonsectionBBis:x=31,500/(6xl)=5,250psi<<14,400psiBendingstressonsectionBBis:hobd;s=31,50036/(16)=15,750psi<24,000psiTocalculatethemaximumstressintheweldgrouponthesteamgenerator,theentiregroupofweldisassumedtoreactthe31,500loadandthetwo8inlegsonlyareassumedtoreacttothebendingmoment.Thestressesduetothesetwoeffectsareaddedtoobtainthemaximumweldstress.Shearstressdueto31,500lbsforce.'if~31,500/(22x0.5><0.707)=4,050psiShearstressintheweldduetobendingmoment,.z,,,=31,500@8/(6><8@0.5x0.707)=14,851psiCombinedshearstress,z=4,050+14,851=18,901psi<21,000psiCONCLUSIONSIthasbeenshowninthisreportthatalltheclosuresoftheSGLAhaveadequatestrengthtoreacttotheloadnormallyexpectedduringitshandlingandtransportation.ThestressallowablesbasedontheAISCcriteriaaresatisfiedbyallthecomponentsoftheclosureassemblywithalargemarginofsafety.SGLAswillbe,therefore,completelysealedandbehavelikeaunitizedbodyforwhichexemptionfrompackagingmayberequestedfromDOT.

'f~~t,il~ks~ea~Wgy,~8 TitleStructuravaluationoftheD.C:CookUnit.G.L.A.PackaeGale.No.ST-307Rev.0Sheet8of10Table1-LocationoftheProtrusionsontheD.C.CookSGLAProtrusionPrimaryInletNozzlePrimaryOutletNozzleHandholeNo.1HandholeNo.2CircumferentialLocationfromtheTop(Degrees)36.3143.790270PrimaryManwayNo.1PrimaryManwayNo.2308.7241.7Blow-DownNozzleNo.1Blow-DownNozzleNo.290270ShellDrain206.3WaterLevelTapEndPlate126.7Notes:(1)3"End-plateisusedtoclosethecutendoftheSGLA.

TitleStructuravaluationofthe-D.C:CookUnit2.G.L.A.PackaeGale.No.ST-307Rev.0Sheet9of10poHanway{2)00000o+PrimaryNozzle{2)OO270'OBlow-DownNozzle90'00Blow-DownNozzleShellDrainNozzleIMaterLevelTap180'iure-1D.C.CookSGLAProtrusionLocation-MT50.5"MT-26"S/~6Fiure-2PrimaNozzleCoverDetails VATitleStructuralEvaluationoftheD.C.CookUnit2S.G.L.A.PackaeGale.No.ST-307Rev.0Sheet10ofi0I361/21I28"g1/4T(P1/4MT-Fiure-3ManwaCoverDetailsMT-3SIDES1/245Typ3SIDESyP1/222.5I5R.S.G.75.13'iure-4End-PlateAttachmentDetails 0'