ML17256A838

Slide Presentation from 820323 Meeting Re Steam Generator Repair Activities at Facility

ML17256A838
Person / Time
Site:	Ginna
Issue date:	03/23/1982
From:	WESTINGHOUSE ELECTRIC COMPANY, DIV OF CBS CORP.
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Shared Package
ML17256A836	List: ML17256A838
References
NUDOCS 8204260126
Download: ML17256A838 (40)

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GINNASTATIONB-STEAMGENERATORNRCMEETINGMARCH23,1982AGENDAoINTRODUCTIONoINSPECTIONANDEXAMINATIONRESULTSoDAMAGEMECHANISMEVALUATIONoRECOVERYPROGRAMoTECHNICALBASISFORREPAIRSoPLANTSCHEDULEoCONCLUSION' GINNASTATIONB-STEAMGENERATORNRCMEETINGMARCH23,1982OBJECTIVESoDETERMINEFULLEXTENTOFDEFECTSANDLOOSEPARTSoDETERMINEFAILUREMECHANISM(8)oRESTORESTEAMGENERATORTOACONDITIONWHICHISSAFETOOPERATEMAINTAININGRADIATIONEXPOSURESASLOWASREASONABLYACHIEVABLEoOBTAINNRCCONCURRENCEFORRETURNTOPOWER GINNASTATIONB-STEAMGENERATORNRCMEETINGMARCH23,1982PURPOSEOFMEETINGoTOREVIEWRESULTSOFINSPECTIONSTODATEoTOOBTAINCONCURRENCEWITHSTEAMGENERATORPROGRAMCONCEPTSoTO'OBTAINAPPROVALFORREMOVALOFSTEAMGENERATOR.TUBESECTIONS GINNASTATIONB-STEAMGENERATORNRCMEETINGMARCH23,1982NSARBCREVIEWSoconcurrencewithprogramconceptsNSARB-2/26NRC-3/1oapprovalofremovalofmetallurgicalsamplesNSARB-2/26NRC-3/1oapprovalofrepairprogramNSARB-3/16NRC-3/23oapprovalofreturntopowerNSARB-midAprilNRC-lateApril MI.~-*~+)i~i*'cRGCEBteamGeneratorccccll=8l87558581911757571LAQ45LECA595755555)+94745454l393735333l292725232ll9l7l5i3ll9753ICOLUM}2L14055452544322822i8iei~l2l04~~~~~~~~'c~~~~~~~~yc~~45'~cp~~'~~~~P~~~~~~~~~~~~~~~~~~~~~~~~~~'~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ROMANV/AYCPtuGGEDTuaESSUB.FS'OZZLE~

i.c'INNASTATION.B-STEAMGENERATORNRCMEETINGMARCH23,1982INSPECTIONUPDATENO.4WEDGEAREAoR45C54-missingandseveredatfirstsupportplateoR44C54-severedattopoftubesheetoR44C55-severedattopoftubesheet-partiallyseveredatfirstsupportplateoR43C55-severedattopoftubesheet,oR44C56-missingandseveredatfirstsupportplateoR44C57I-missingandseveredatfirstsupportplate GINNA=STATIONB-STEAMGENERATORNRCMEETINGMARCH23,1982METALLURGICALEXAMINATIONositephotographyoWestinghouseR&Dlaboratoriesomodelforwearorientationcomparisonsophotographyat.'90'ncrementsoradiographyat45'ncrementsotransversecrosssectionsofcolumn55tubes-R42C55-2.5"and4"fromupperend-R43C55-2.5"and4"fromupperend-R44C55-'.5",'".and8"fromupperend-SEMandstandardphotomicrographs GXNNASTATIONB-STEAMGENERATORNRCMEETINGMARCH23,1982LABORATORYEXAMINATIONREMOVEDTUBINGWEARSURFACES0PRXMARXLYRUBBINGWEARCIRCUMFERENTIALDXRECTXON0NOEVIDENCEOFCORROSIONXNVOLVEMENT0EVXDENCEOFSURFACECOLDWORKING0FATIGUESTRIATIONONFRACTURESURFACE0TENSILEOVERLOADBURSTTUBEFAILURE,SURFACE R.E..GINNAS/G8-POSTULATEDTUBERUPTUREMECHANISM.FOREIGNOBJECTINHIGHFLUIDVELOCITYFIELDLATERALIMPACT/WEARONPLUGGEDTUBESTUBECOLLAPSEFATIGUETEARTUBESHREDDING/FRAGMENTATIONTUBESEVERANCE,TUBEWHIPIMPACT/WEARONPLUGGEDTUBESWEA%ONACTIVETUBETUBERUPTURE MECHANISMEVALUATIONPROGRAMIINVESTIGATIONOF.VARIOUSINFLUENCESMECHANICALLATERALLOADSGROSSFLUIDLOADSAXIALLOADSLOCALFLUIDLOADS4HISTORICAL.INFORMATIONREVIEW0INITIALPERIMETERTUBE'INVESTIGATION4LABORATORYEXAMINATIOHOFREMOVEDTUBESECTIONS4MODELTESTING0LABORATORYCOLLAPSEANDFATIGUETESTING4FIEL'DTESTINGANDEXAMINATIOH LATERALLOADS0EXTERNALPRESSURE0TUBEOVALITY0VARYINGLEVELSOFCONCENTRATEDLOADS0VARYINGLEVELS.OFTUBEMALLTHICKNESSIAXIALLOADAFFECT GROSSFLUIDLOADS1FLUIDELASTICINTERACTIONANALYSISFLOMVELOCITIESTUBECROSSSECTIONFLUIDELASTICSTABILITYVORTEXSHEDDINGCROSSFLOW0EFFECTOFTUBE.REMOVALONFLUIDFLOMFIELD

'AXIAL'L'OADS0STRUCTURALEVALUATIONTUBE-TO-SHELLMISMATCHTUBE-TO-TUBEMISMATCHMISALIGNMENT,TUBESHEET-SUPPORTPLATEMISMATCHTUBESHEETROTATIONSTRESSCONCENTRATION0U-BENDWITHREMOVEDSECTION GINNASTATIONB-STEAMGENERATORNRCMEETXNGMARCH23,l982LABORATORYEXAMINATXONREMOVEDTUBING0WEARSURFACES0PRIMARXLYRUBBINGWEARCIRCUMFERENTXALDIRECTION0NOEVXDENCEOFCORROSXONINVOLVEMENT0EVIDENCEOFSURFACECOLDWORKINGFATIGUESTRIATIONONFRACTURESURFACE0TENSILEOVERLOADBURSTTUBEFAILURESURFACE RQQLSINLETFLOtfNlMLSHBLL',~r~L,'OLDPLNfTESTLCQP'%8K.""'ACILHYTAMPAPLOMB;',KLNrlOlgNBINCMGCT-LABORATORYTESTING0COLLAPSETESTINGEXTERNALPRESSURELATERALLOADSAXIALLOADFATIGUETESTINGAMPLITUDESGEOMETRYBOUNDARYCONDITIONAXIALLOAD GINNASTATIONB-STEAMGENERATORNRCMEETING,MARCH23,1982CORRECTIVEACTIONSeddycurrentexaminationovideoinspectionso-obtainmetallurgicalsamplesoremovestructurallydegradedtubesectionsorestorepreventativelypluggedtubestoserviceoremoveforeignobjectsandtubingfragmentsoeddycurrentexaminetubes.adjacenttorepairsosecondarysidevideoinspectionfollowingrepairsoprimaryandsecondaryhydrostatictestsometalimpactmonitoringsystem GINNASTATIONB-STEAMGENERATORNRCMEETINGMARCH23,1982REPAIROPTIONSoEDMcuttingprocessomechanicalcutterso'hydraulictuberemovalsystemoloosepartsretrievalequipmentoremovefromtubesheetendoadditionalshellpenetrationsoprovenrepairtechniques GINNASTATIONB-STEAMGENERATORNO.4WEDGEAREACOLUMN"6261605958575655545352515049484746++4-ooo45.ooo44O~I00ooo06ooooooo0~00000004342000000OQ00Q000000OOOOOOOOOO00000004140ROWPulledApril1978(1tube)StructurallyDegraded(19tubes)VideoIndication(1tube)~EddyCurrentSignal(5tubes)QPreventativelyPlugged(3tube's)

IIGINNASTATIONB-STEAMGENERATORNO.6WEDGEAREACOLUMN929190898887860.0O.00'0+000+000000.~50000>4+000000000Q00010I00009+000000\+000000'0800O.0000ROWStructurallyDegraded(5tubes)~~~VideoODIndication'(5tubes)EddyCurrentSignal(1tube)3/19/82 GINNASTATIONB-STEAMGENERATORRC40C70AREACOLUMN77767574'372717069686766650410040+++000++0000000000O.O00000000000000~000000000O.0Q000000G000034ROWStructurallyDegraded(notubes)VideoODIndication-(5tubes)~~EddyCurrentSignal(4tubes)3/19/82 l~gpLL---'-"p"ppER-tI)l.l88'I'T/!/~s3:(JIQlIIiivseI'$5;3.5.:2T GINNASTATIONB-STEAMGENERATORCATEGORIZATIONOFDEFECTSCATEGORYl1.StructurallyDegraded2.VideoODIndication3.EddyCurrentSignalNO.6WEDGEAREAR8C92R11C91R12C91R14C90R15C90R9C91R10C91R13C90R16C89R17C89R15C89R40C70AREAR38C71R38C72R39C68R39C69R39C70R35C75R40C67R40C68R41C66R42C55MR43C53.R43C54MR43C55MR43C56MR43C57R43C58NO.4WEDGEAREAR43C59R43C60R43C61R44C52R44C53MR44C54R45C51R45C46R45C47MR45C48R45C49R45C50R44C55MR44C56R44C57R44C58R45C53R45C54NO.2WEDGEAREAR12C2R28C12R30C15R31C15R32C15R32C16R33C154.PreventativelyPluggedR41C55R42C54R42C56TOTALS28MMetallurgicalSamplesR45C52pulledApril,1978.NRCMeetingMarch23,1982 sIGINNASTATIONB-STEAMGENERATORNO.2WEDGEAREAColumn171615141312<<ll.0000I000'I00~0003332313000000'0000000~00000000'292827ROWStructurallyDegraded(nctubes)VideoODIndication(notubes)EddyCurrentSignal.(6tubes)R12C2notshownStayBar3/19/82 SVPPOQTPL4TEsanCoAEZEL.Tuft"=5Hz'QORIGINALINITIAL,DATCNUMIICRREVISIONDRAWN~YCHCCKCDSYRCSP,CNG,CNGMANG'RROCHESTERGAS81ELECTRICCORP.IIOCHK5TER,1CKWYCDtK RGEBPOSTTUBEREPAIREVALUAT+CONDITIONS:-TUBEREMOVAL-SURFACEIRREGULARI'TYWITHOUTCOLLAPSE-SEVEREDTUBESATFIRSTTSPHYDRAULICSCONSIDERATIONS:-TUBEFATIGUEDUETOFLUIDINTERACTIONS-FLUID-ELASTICSTABILITY-VORTEXSHEDDING-TURBULENCE-LOCALFLUIDEFFECTS-EDDYS,CRACKSTABILITY-FLOHVELOCITYANDEQUALITYCHANGESSTRUCTURALCONSIDERATIONS:-FATIGUEMARGINUNDEROPERATINGTRANSIENTS-COLLAPSEINTEGRITY-STABILITYQFTUBESSEVEREDBELOW'SP

~a'Lyt7i.8'7W/D.aO.a5/N.rgy@MZL.~)g)Ewead%&)s]oPs=A'.vreacrrp=w~..Ia&.oz~aW~Wr.~~urnca&~wMPv~~raAW~/DVZCM~/Q0~6.o.4.o It~4~~'Wzir~-HzxraNOo&aAWY~waxTiaws~+~~fg/<g~+7/D-O.OlIIIIay~wcMmsecrroN/5'7..PrMEXHEP-0crpcvda/~8.TC3waar0go%.oYAK/ZEW~iswEY.~a.zZ.Of'.6'r.z.B~'S74f3CC04.0,a.oyZor6.o,zo.oc&s~/MWYECczr7y-pm SUMMARYOFVORTEXSHEDDINGANDTURBULENCEANALYSES-FIXED-FIXEDBOUNDARIES-CROSS-FLOWVELOCITY,10.0FPS-DAMPINGRATIO,0.01CROSSSECTIONOFDISTORTEDZONEVORTEXSHEDDINGTURBULENCEVIBRATIONAMPLITUDES,MILSCYLINDER(NOMINAL)10%OVALITYKIDNEYFLAT0.770.790.792.130.810.830.831.53VIBRATIONAMPLITUDEDUETOVORTEXSHEDDINGANDCROSS-FLOWTURBULENCEARERELATIVELYUNAFFECTEDBYSMALLDISTORTIONS'NDSURFACEIRREGULARITY II'II'I IPI111j.III'~I~IIl>1ll1>'l.l!I)~~Slll1lI~tI~~II!I~~0~1IIIIr~eee~~e~~ea~'l\4~PHg/N/OP.V~~/~"/I~~~1~Irr~r1'llr~efIrr.~1fCrrrr'1Iwreee3QR)/SF/Fy.r~~~~~~e.IV<>t~~<Aeee~Cd/gi~0~~~~

/J~~~mf&iMWWWIIÃN/Jtp EFFECTOFHOTLEGTUBEREMOVALONCROSS-FLOWVELOCITY(2-DMATHEMATICALSTUDY)INPUTCROSS-FLOWVELOCITES:6.0ft/sec.hotleg5.4ft/sec.coldlegCASEAVERAGEVELOCITYINTUBEREMOVALREGIONMAX.GAPVELOCITYINFIRSTTUBEROMDOWNSTREAMNOMINAL10TUBESREMOVED40TUBESREMOVED5.303.693.8619.4013.5014.14TUBEREMOVALDOES'NOT,'ADVERSELYAFFECTFLOWVELOCITIES I~t~

FATIGUEEVALUATIONOFSURFACEDAMAGEDPLUGGEDTUBE(ASSUMEFULLAXIALRESTRAINTATFIRSTTSP)IQ.ENVELOPINGTRANSIENT-PLANTLOADING/UNLOADING,14,500CYCLE!0ASSOCIATEDLOADS'TEMPERATUREVARIATIONS,PRIM'ARYT:547F(HOTSTANDBY)TO602F(1.00$POWER)HOTSECONDARYT:547F(HOTSTANDBY)TO518F(100%POWER)ST'oEXTERNALPRESSURERANGE:795-1020PSI.oAXIALTUBELOADRANGESoTUBE-TO-SHELLTHERMALMISMATCH+780lbs.ASSUMPTION.-TUBEINCONTINUOUSTHERMALE(UILIBRIUMWITHSECONDARYFLUID;STUB-BARRELWITHINFINITETHERMALINERTIAoPLUGGED-TO-ACTIVETUBETHERMALMISMATCH:0TO+1200LASSUMPTION-SINGLEPLUGGEDTUBEWITHI'NACLUSTEROFACTIVETUBES6AXIALBENDINGLOADS~AS-BUILTMISALIGNMENT,0.25INCHoTS-TO-TSPTHERMALGROWTHMISMATCH,0-05INCHo'SROTATIONDUETOPRIM-TO-SECAp,0.08INCH OFATIGUEUSAGECALCULATIONSMAXIMUMSTRESSINTENSITYRANGESALT=56.25KSI(ADJUSTEDTOE.~26x10KSIFORASMEFATIGUECURVE)ASSUMEDSTRESSCONCENTRATIONFACTORFORSURFACEDAMAGE=4.0'(MAX.PERASME)NUMBEROFCYCLESn=59,000(THISNUMBERRE-PRESENTSALLTRANSIENTSLUMPEDCONSERVATIVELY)MIHIMUMACTUALUSABLE::CYCI,ESPERASMECODEH=135,000CALCULATEDUSAGE=n7N=0.4303~u8EG~oM&rRyWRAPPERFIRST;TUSE'V&'OR7PLRrEDuraPER)P~EA'lP~usszuruacho87'S0$.Aoa5o~~a.~srutiGRRRELSAQor.)SZ~~eSSZZSrCrimyiruaeO835G.X.XO.OZO"urSCL7UZESeBE7 COLLAPSEINTEGRITYEYALUATNSBASEDONEXTENSIVELABORATORYTESTINGCOLLAPSEPRESSUREFORNOMINALTUBING5000PSICOLLAPSESTRENGTHISRELATIVELYUNAFFECTEDBYSHORT(a<TUBEDIAMETER),THROUGH-MALLTIGHTCRACKSFORTUBECOLLAPSE,DUETOTHEMAXIMUMhp-1020PSIRE(UIREDWALLDEGRADATIONIS80'X,"IFUNIFORM,AND>90KIFLOCALTUBECOLLAPSERESULTSFROMPLASTICINSTABILITYANDREPRESENTSANINSTANTANEOUSFAILUREMODE.OFALLTHEIQADINGCONDITIONSFORRGETUBING,THEMAXIMUMap(-1020PSI)OCCURSDURINGNORMALOPERATZONWHICH,THEREFORE,REPRESENTSAPROOFTEST.

STABILITYOFTUBESSEVEREDBELOWTSPBROKENHOTLEGOFTUBEGUIDEDBYUPPERPLATES'TUBESEVEREDJUSTBELOWTHEFIRSTPLATETSPTHK=0.75INCH51.88INCHTS4MAXIMUMTUBEBUNDLESTRETCH=0.,12IN.DURINGFLB,bp=2560psi4Prior-to-sectherma1growthmismatchFORPULLOUT*THRU0.75INCHTHI'CKPLATE,RE(UIRED~T=1900EXPECTED>T<100FDURINGOPERATION(400FDUIRNGALOCA4.TUBEPULL-OUTDUETOTUBESWINGORROTATIONATU-BENDNOTPOSSIBLESINCEBROKENLEGOFTHETUBEISGUIDEDTHRUUPPERPLATESREQUIRESPRIMARYSIDEDOWNTRANSIENTIFTUBESAREAXIALLYRESTRAINEDATTHEPLATE,.SECONDARYSIDEDOWNTRANSIENT,IFFREE 4POST-REPAIRTUBEEVALUATIONSUMMARY-FLUID-ELASTICSTABILITY,VORTEX.SHEDDINGANDTURBULENCERESPONCESOFATUBEAREPRACTICALLYUNAFFECTEDBYSMALLDISTORTIONSANDSURFACEIRREGULARITIES.-LOCALFLUIDFORCESARENEGLIGIBLYSMALLTOCAUSECRACKPROPAGATION.r-REMOVALOFTUBESHASNOADVERSEIMPACTONTUBESTABILITYDUETOFLUIDINTERACTIONS.-FORSURFACEDAMAGEDTUBES,ACCEPTABLEFATIGUEMARGINEXISTSFORSUBSEQUENTOPERATIONS-PLANT':OPERATIONBEINGAPROOFCOLLAPSETEST,STRUCTURALLYSTABLETUBESAREEXPECTEDTOREMAINSTABLEDURINGSUBSEQUENTOPERATIONS.'-TUBESSEVEREDATTHEFIRST"TSPAREGEOMETRICALLYSTABLEANDCANNOTPULLOUTOFTHEPLATEDUETOOPERATINGANDFAULTEDTRANSIENTS.

~~t74.+~.STARTBS/G).z-~NUSMOCK-UPMODICATIONS-March19,1982TEST-March22,1982-NRCMEETNQ'-March23,1982-REMOVALORDAMAGEDTUBESINP4ANDf6WEDGEAREAS-March31,1982-MECHANICALPLUGREMOVAL-April2,1982COMPLETEWORKINLOWERSECTIONOR"B"STEAMGENERATOR-April5,1982-COMPLETE"B"S/GMODIRICATIONS-April11,1982-RCPWORKCOMPLETE-April12,1982MATER'LANCE"B"S/G-April12,1982FINALTVINSPECTION-April13,1982SECONDARYHYDRO"B"S/G-April10,1982CONTAINIKNTAIRTEST(ILRT)-April15,1982FINALS/GREPORT-April16,1982-CREVICECLEANING-April20,1982NRCMEETING-LateApril