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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ML17256A836	List: ML17256A838
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NUDOCS 8204260126
Download: ML17256A838 (40)

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GINNASTATIONB-STEAMGENERATOR NRCMEETINGMARCH23,1982AGENDAoINTRODUCTION oINSPECTION ANDEXAMINATION RESULTSoDAMAGEMECHANISM EVALUATION oRECOVERYPROGRAMoTECHNICAL BASISFORREPAIRSoPLANTSCHEDULEoCONCLUSION' GINNASTATIONB-STEAMGENERATOR NRCMEETINGMARCH23,1982OBJECTIVES oDETERMINE FULLEXTENTOFDEFECTSANDLOOSEPARTSoDETERMINE FAILUREMECHANISM(8) oRESTORESTEAMGENERATOR TOACONDITION WHICHISSAFETOOPERATEMAINTAINING RADIATION EXPOSURES ASLOWASREASONABLY ACHIEVABLE oOBTAINNRCCONCURRENCE FORRETURNTOPOWER GINNASTATIONB-STEAMGENERATOR NRCMEETINGMARCH23,1982PURPOSEOFMEETINGoTOREVIEWRESULTSOFINSPECTIONS TODATEoTOOBTAINCONCURRENCE WITHSTEAMGENERATOR PROGRAMCONCEPTSoTO'OBTAIN APPROVALFORREMOVALOFSTEAMGENERATOR

.TUBESECTIONS GINNASTATIONB-STEAMGENERATOR NRCMEETINGMARCH23,1982NSARBCREVIEWSoconcurrence withprogramconceptsNSARB-2/26NRC-3/1oapprovalofremovalofmetallurgical samplesNSARB-2/26NRC-3/1oapprovalofrepairprogramNSARB-3/16NRC-3/23oapprovalofreturntopowerNSARB-midAprilNRC-lateApril MI.~-*~+)i~i*'cRGCEBteamGenerator ccccll=8l87558581911757571LAQ45LECA595755555)+94745454l 393735333l 292725232l l9l7l5i3ll9753ICOLUM}2L14055452544322822i8iei~l2l04~~~~~~~~'c~~~~~~~~yc~~45'~cp~~'~~~~P~~~~~~~~~~~~~~~~~~~~~~~~~~'~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ROMANV/AYCPtuGGEDTuaESSUB.FS'OZZLE~

i.c'INNASTATION.B-STEAMGENERATOR NRCMEETINGMARCH23,1982INSPECTION UPDATENO.4WEDGEAREAoR45C54-missingandseveredatfirstsupportplateoR44C54-severedattopoftubesheet oR44C55-severedattopoftubesheet

-partially severedatfirstsupportplateoR43C55-severedattopoftubesheet, oR44C56-missingandseveredatfirstsupportplateoR44C57I-missingandseveredatfirstsupportplate GINNA=STATION B-STEAMGENERATOR NRCMEETINGMARCH23,1982METALLURGICAL EXAMINATION ositephotography oWestinghouse R&Dlaboratories omodelforwearorientation comparisons ophotography at.'90'ncrements oradiography at45'ncrements otransverse crosssectionsofcolumn55tubes-R42C55-2.5"and4"fromupperend-R43C55-2.5"and4"fromupperend-R44C55-'.5",'".and8"fromupperend-SEMandstandardphotomicrographs GXNNASTATIONB-STEAMGENERATOR NRCMEETINGMARCH23,1982LABORATORY EXAMINATION REMOVEDTUBINGWEARSURFACES0PRXMARXLY RUBBINGWEARCIRCUMFERENTIAL DXRECTXON 0NOEVIDENCEOFCORROSION XNVOLVEMENT 0EVXDENCEOFSURFACECOLDWORKING0FATIGUESTRIATION ONFRACTURESURFACE0TENSILEOVERLOADBURSTTUBEFAILURE,SURFACE R.E..GINNAS/G8-POSTULATED TUBERUPTUREMECHANISM

.FOREIGNOBJECTINHIGHFLUIDVELOCITYFIELDLATERALIMPACT/WEAR ONPLUGGEDTUBESTUBECOLLAPSEFATIGUETEARTUBESHREDDING/

FRAGMENTATION TUBESEVERANCE, TUBEWHIPIMPACT/WEAR ONPLUGGEDTUBESWEA%ONACTIVETUBETUBERUPTURE MECHANISM EVALUATION PROGRAMIINVESTIGATION OF.VARIOUSINFLUENCES MECHANICAL LATERALLOADSGROSSFLUIDLOADSAXIALLOADSLOCALFLUIDLOADS4HISTORICAL

.INFORMATION REVIEW0INITIALPERIMETER TUBE'INVESTIGATION

4LABORATORY EXAMINATIOH OFREMOVEDTUBESECTIONS4MODELTESTING0LABORATORY COLLAPSEANDFATIGUETESTING4FIEL'DTESTINGANDEXAMINATIOH LATERALLOADS 0EXTERNALPRESSURE0TUBEOVALITY0VARYINGLEVELSOFCONCENTRATED LOADS0VARYINGLEVELS.OFTUBEMALLTHICKNESS IAXIALLOADAFFECT GROSSFLUIDLOADS1FLUIDELASTICINTERACTION ANALYSISFLOMVELOCITIES TUBECROSSSECTIONFLUIDELASTICSTABILITY VORTEXSHEDDINGCROSSFLOW0EFFECTOFTUBE.REMOVAL ONFLUIDFLOMFIELD

'AXIAL'L'OADS0STRUCTURAL EVALUATION TUBE-TO-SHELL MISMATCHTUBE-TO-TUBE MISMATCHMISALIGNMENT,TUBESHEET-SUPPORT PLATEMISMATCHTUBESHEET ROTATIONSTRESSCONCENTRATION 0U-BENDWITHREMOVEDSECTION GINNASTATIONB-STEAMGENERATOR NRCMEETXNGMARCH23,l982LABORATORY EXAMINATXON REMOVEDTUBING0WEARSURFACES0PRIMARXLY RUBBINGWEARCIRCUMFERENTXAL DIRECTION 0NOEVXDENCEOFCORROSXON INVOLVEMENT 0EVIDENCEOFSURFACECOLDWORKINGFATIGUESTRIATION ONFRACTURESURFACE0TENSILEOVERLOADBURSTTUBEFAILURESURFACE RQQLSINLETFLOtfNlMLSHBLL',~r~L,'OLDPLNfTESTLCQP'%8K.""'ACILHY TAMPAPLOMB;',KLNrlOlgNBINCMGCT-LABORATORY TESTING0COLLAPSETESTINGEXTERNALPRESSURELATERALLOADSAXIALLOADFATIGUETESTINGAMPLITUDES GEOMETRYBOUNDARYCONDITION AXIALLOAD GINNASTATIONB-STEAMGENERATOR NRCMEETING,MARCH23,1982CORRECTIVE ACTIONSeddycurrentexamination ovideoinspections o-obtainmetallurgical samplesoremovestructurally degradedtubesectionsorestorepreventatively pluggedtubestoserviceoremoveforeignobjectsandtubingfragments oeddycurrentexaminetubes.adjacenttorepairsosecondary sidevideoinspection following repairsoprimaryandsecondary hydrostatic testsometalimpactmonitoring system GINNASTATIONB-STEAMGENERATOR NRCMEETINGMARCH23,1982REPAIROPTIONSoEDMcuttingprocessomechanical cutterso'hydraulic tuberemovalsystemoloosepartsretrieval equipment oremovefromtubesheet endoadditional shellpenetrations oprovenrepairtechniques GINNASTATIONB-STEAMGENERATOR NO.4WEDGEAREACOLUMN"6261605958575655545352515049484746++4-ooo45.ooo44O~I00ooo06ooooooo0~00000004342000000OQ00Q000000OOOOOOOOOO00000004140ROWPulledApril1978(1tube)Structurally Degraded(19tubes)VideoIndication (1tube)~EddyCurrentSignal(5tubes)QPreventatively Plugged(3tube's)

IIGINNASTATIONB-STEAMGENERATOR NO.6WEDGEAREACOLUMN929190898887860.0O.00'0+000+000000.~50000>4+000000000Q00010I00009+000000\+000000'0800O.0000ROWStructurally Degraded(5tubes)~~~VideoODIndication'(5 tubes)EddyCurrentSignal(1tube)3/19/82 GINNASTATIONB-STEAMGENERATOR RC40C70AREACOLUMN77767574'372717069686766650410040+++000++0000000000O.O00000000000000~000000000O.0Q000000G000034ROWStructurally Degraded(notubes)VideoODIndication-(5 tubes)~~EddyCurrentSignal(4tubes)3/19/82 l~gpLL---'-"p"ppER-tI)l.l88'I'T/!/~s3:(JIQlIIiivseI'$5;3.5.:2T GINNASTATIONB-STEAMGENERATOR CATEGORIZATION OFDEFECTSCATEGORYl1.Structurally Degraded2.VideoODIndication 3.EddyCurrentSignalNO.6WEDGEAREAR8C92R11C91R12C91R14C90R15C90R9C91R10C91R13C90R16C89R17C89R15C89R40C70AREAR38C71R38C72R39C68R39C69R39C70R35C75R40C67R40C68R41C66R42C55MR43C53.R43C54MR43C55MR43C56MR43C57R43C58NO.4WEDGEAREAR43C59R43C60R43C61R44C52R44C53MR44C54R45C51R45C46R45C47MR45C48R45C49R45C50R44C55MR44C56R44C57R44C58R45C53R45C54NO.2WEDGEAREAR12C2R28C12R30C15R31C15R32C15R32C16R33C154.Preventatively PluggedR41C55R42C54R42C56TOTALS28MMetallurgical SamplesR45C52pulledApril,1978.NRCMeetingMarch23,1982 sIGINNASTATIONB-STEAMGENERATOR NO.2WEDGEAREAColumn171615141312<<ll.0000I000'I00~0003332313000000'0000000~00000000'292827ROWStructurally Degraded(nctubes)VideoODIndication (notubes)EddyCurrentSignal.(6tubes)R12C2notshown StayBar3/19/82 SVPPOQTPL4TEsanCoAEZEL.Tuft"=5Hz' QORIGINALINITIAL,DATCNUMIICRREVISIONDRAWN~YCHCCKCDSYRCSP,CNG,CNGMANG'RROCHESTER GAS81ELECTRICCORP.IIOCHK5TER,1CKWYCDtK RGEBPOSTTUBEREPAIREVALUAT+CONDITIONS:

-TUBEREMOVAL-SURFACEIRREGULARI'TY WITHOUTCOLLAPSE-SEVEREDTUBESATFIRSTTSPHYDRAULICS CONSIDERATIONS:

-TUBEFATIGUEDUETOFLUIDINTERACTIONS

-FLUID-ELASTIC STABILITY

-VORTEXSHEDDING-TURBULENCE

-LOCALFLUIDEFFECTS-EDDYS,CRACKSTABILITY

-FLOHVELOCITYANDEQUALITYCHANGESSTRUCTURAL CONSIDERATIONS:

-FATIGUEMARGINUNDEROPERATING TRANSIENTS

-COLLAPSEINTEGRITY

-STABILITY QFTUBESSEVEREDBELOW'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~-Hzxra NOo&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 SUMMARYOFVORTEXSHEDDINGANDTURBULENCE ANALYSES-FIXED-FIXED BOUNDARIES

-CROSS-FLOW

VELOCITY, 10.0FPS-DAMPINGRATIO,0.01CROSSSECTIONOFDISTORTED ZONEVORTEXSHEDDINGTURBULENCE VIBRATION AMPLITUDES, MILSCYLINDER(NOMINAL) 10%OVALITYKIDNEYFLAT0.770.790.792.130.810.830.831.53VIBRATION AMPLITUDE DUETOVORTEXSHEDDINGANDCROSS-FLOW TURBULENCE ARERELATIVELY UNAFFECTED BYSMALLDISTORTIONS'ND SURFACEIRREGULARITY 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-FLOW VELOCITY(2-DMATHEMATICAL STUDY)INPUTCROSS-FLOW VELOCITES:

6.0ft/sec.hotleg5.4ft/sec.coldlegCASEAVERAGEVELOCITYINTUBEREMOVALREGIONMAX.GAPVELOCITYINFIRSTTUBEROMDOWNSTREAM NOMINAL10TUBESREMOVED40TUBESREMOVED5.303.693.8619.4013.5014.14TUBEREMOVALDOES'NOT,'ADVERSELY AFFECTFLOWVELOCITIES I~t~

FATIGUEEVALUATION OFSURFACEDAMAGEDPLUGGEDTUBE(ASSUMEFULLAXIALRESTRAINT ATFIRSTTSP)IQ.ENVELOPING TRANSIENT

-PLANTLOADING/UNLOADING, 14,500CYCLE!0ASSOCIATED LOADS'TEMPERATURE VARIATIONS, PRIM'ARYT:547F(HOTSTANDBY)TO602F(1.00$POWER)HOTSECONDARY T:547F(HOTSTANDBY)TO518F(100%POWER)ST'oEXTERNALPRESSURERANGE:795-1020PSI.oAXIALTUBELOADRANGESoTUBE-TO-SHELL THERMALMISMATCH+780lbs.ASSUMPTION.-

TUBEINCONTINUOUS THERMALE(UILIBRIUM WITHSECONDARY FLUID;STUB-BARREL WITHINFINITETHERMALINERTIAoPLUGGED-TO-ACTIVE TUBETHERMALMISMATCH:

0TO+1200LASSUMPTION

-SINGLEPLUGGEDTUBEWITHI'NACLUSTEROFACTIVETUBES6AXIALBENDINGLOADS~AS-BUILTMISALIGNMENT, 0.25INCHoTS-TO-TSP THERMALGROWTHMISMATCH, 0-05INCHo'SROTATIONDUETOPRIM-TO-SEC Ap,0.08INCH OFATIGUEUSAGECALCULATIONS MAXIMUMSTRESSINTENSITY RANGESALT=56.25KSI(ADJUSTED TOE.~26x10KSIFORASMEFATIGUECURVE)ASSUMEDSTRESSCONCENTRATION FACTORFORSURFACEDAMAGE=4.0'(MAX.

PERASME)NUMBEROFCYCLESn=59,000(THISNUMBERRE-PRESENTSALLTRANSIENTS LUMPEDCONSERVATIVELY)

MIHIMUMACTUALUSABLE::CYCI,ES PERASMECODEH=135,000CALCULATED USAGE=n7N=0.4303~u8EG~oM&rRyWRAPPERFIRST;TUSE'V&'OR 7PLRrEDuraPER)P~EA'l P~usszuruacho87'S0$.Aoa5o~~a.~srutiGRRRELSAQor.)SZ~~eSSZZ SrCrimyiruaeO835G.X.XO.OZO"urSCL7UZESeBE7 COLLAPSEINTEGRITY EYALUATNSBASEDONEXTENSIVE LABORATORY TESTINGCOLLAPSEPRESSUREFORNOMINALTUBING5000PSICOLLAPSESTRENGTHISRELATIVELY UNAFFECTED BYSHORT(a<TUBEDIAMETER),

THROUGH-MALL TIGHTCRACKSFORTUBECOLLAPSE, DUETOTHEMAXIMUMhp-1020PSIRE(UIREDWALLDEGRADATION IS80'X,"IFUNIFORM,AND>90KIFLOCALTUBECOLLAPSERESULTSFROMPLASTICINSTABILITY ANDREPRESENTS ANINSTANTANEOUS FAILUREMODE.OFALLTHEIQADINGCONDITIONS FORRGETUBING,THEMAXIMUMap(-1020PSI)OCCURSDURINGNORMALOPERATZON WHICH,THEREFORE, REPRESENTS APROOFTEST.

STABILITY OFTUBESSEVEREDBELOWTSPBROKENHOTLEGOFTUBEGUIDEDBYUPPERPLATES'TUBESEVEREDJUSTBELOWTHEFIRSTPLATETSPTHK=0.75INCH51.88INCHTS4MAXIMUMTUBEBUNDLESTRETCH=0.,12IN.DURINGFLB,bp=2560psi4Prior-to-sec therma1growthmismatchFORPULLOUT*THRU0.75INCHTHI'CKPLATE,RE(UIRED~T=1900EXPECTED>T<100FDURINGOPERATION (400FDUIRNGALOCA4.TUBEPULL-OUTDUETOTUBESWINGORROTATIONATU-BENDNOTPOSSIBLESINCEBROKENLEGOFTHETUBEISGUIDEDTHRUUPPERPLATESREQUIRESPRIMARYSIDEDOWNTRANSIENT IFTUBESAREAXIALLYRESTRAINED ATTHEPLATE,.SECONDARY SIDEDOWNTRANSIENT, IFFREE 4POST-REPAIR TUBEEVALUATION SUMMARY-FLUID-ELASTIC STABILITY, VORTEX.SHEDDING ANDTURBULENCE RESPONCES OFATUBEAREPRACTICALLY UNAFFECTED BYSMALLDISTORTIONS ANDSURFACEIRREGULARITIES.

-LOCALFLUIDFORCESARENEGLIGIBLY SMALLTOCAUSECRACKPROPAGATION.

r-REMOVALOFTUBESHASNOADVERSEIMPACTONTUBESTABILITY DUETOFLUIDINTERACTIONS.

-FORSURFACEDAMAGEDTUBES,ACCEPTABLE FATIGUEMARGINEXISTSFORSUBSEQUENT OPERATIONS

-PLANT':OPERATION BEINGAPROOFCOLLAPSETEST,STRUCTURALLY STABLETUBESAREEXPECTEDTOREMAINSTABLEDURINGSUBSEQUENT OPERATIONS.

'-TUBESSEVEREDATTHEFIRST"TSPAREGEOMETRICALLY STABLEANDCANNOTPULLOUTOFTHEPLATEDUETOOPERATING ANDFAULTEDTRANSIENTS.

~~t74.+~.STARTBS/G).z-~NUSMOCK-UPMODICATIONS-March19,1982TEST-March22,1982-NRCMEETNQ'-March23,1982-REMOVALORDAMAGEDTUBESINP4ANDf6WEDGEAREAS-March31,1982-MECHANICAL PLUGREMOVAL-April2,1982COMPLETEWORKINLOWERSECTIONOR"B"STEAMGENERATOR-April5,1982-COMPLETE"B"S/GMODIRICATIONS

-April11,1982-RCPWORKCOMPLETE-April12,1982MATER'LANCE"B"S/G-April12,1982FINALTVINSPECTION

-April13,1982SECONDARY HYDRO"B"S/G-April10,1982CONTAINIKNT AIRTEST(ILRT)-April15,1982FINALS/GREPORT-April16,1982-CREVICECLEANING-April20,1982NRCMEETING-LateApril