ML17261A431

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Summary Exam Rept for 1987 Steam Generator Eddy Current Insp, Summarizing Observations & Corrective Action from Insp Performed During Feb 1987 Outage
ML17261A431
Person / Time
Site: Ginna Constellation icon.png
Issue date: 03/05/1987
From: CURTIS A E, HENRY G L, SAPORITO M J
ROCHESTER GAS & ELECTRIC CORP.
To:
Shared Package
ML17261A430 List:
References
NUDOCS 8703160084
Download: ML17261A431 (39)
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ROCHESTERGASANDELEC/FR[CCORPORATION89EASTAVENUE,ROCHESTER,NY14649RESEARCHANDSCIENCESDEPARTMENTMATERIALSENGINEERINGANDINSPECTIONSERVICESSECTIONSUMMARYEXAMINATIONREPORTFORTHE198?STEAMGENERATOREDDYCURRENTINSPECTIONATR.E.GINNANUCLEARPOWERSTATIONMARCH5,1987PREPAREDBY:AG.L.Henry,NDEechnicianEddyCurrentLevelIIIExaminerDATE:Z587REVIEWEDBY:MichaelJ.Saporito,SupervisorMaterialsEngineeringLaboratoriesLevelIIIExaminerDATE:APPROVEDBY:A.E.CurtisIII,Manager,MaterialsEngineeringandInspectionServices'LevelIIIExaminerDATE:8703i60084870309PDRADOCN05000244PDR

~~11 TABLEOFCONTENTS

1.0INTRODUCTION

PAGE1OF302.0DATAACQUISITIONPROGRAMPAGE2OF303.0DATAANALYSISRESULTS'SUMMARYPAGE5OF304.0OBSERVATIONSPAGE16OF305.0CORRECTIVEACTIONPAGE19OF30 U'.0INTRODUCTIONThefollowingreportisasummaryoftheresultsofthemultifrequencyeddycurrentexaminationperformedduringtheFebruary1987AnnualRefuelingandMaintenanceOutageattheR.E.GinnaNuclearPowerStation.Theexaminationwasperformedonboththe"A"and"B"recirculatingsteamgeneratorswhicharewestinghouseSeries-44design,containing3260InconelGrade600tubeshavinganoutsidediameterof0.875"andanominalwallthicknessof0.050".TheexaminationwasperformedbyRochesterGasdcElectric(RGdcE)personnelthathavebeentrainedandqualifiedintheeddycurrentexaminationmethodtoatleastaLevelIcertification.TheinitialdataanalysisreviewwasperformedbyateamofZETECInc.personnel.AnindependentdataanalysisreviewwasperformedbyRGAEandBRWpersonnelsubsequenttotheZetecanalysis.Thedataanalysiswasperformed,bybothteams,utilizingtheZetecDDA-4DigitalDataAnalysisSystem.Inaddition,Zetec'sAutomatedDataScreeningSystemwasutilizedasathirdreviewofthedata.FinalresolutionsofalldataanalysiswasperformedbyRGRELevelIIIpersonnel.ThepurposeoftheeddycurrentexaminationwastoassessanycorrosionormechanicaldamagethatmayhaveoccurredduringtheoperationcyclesinceMarch1986.Particularattentionwasgiventodetectingintergranularattack(IGA)andintergranularstresscorrosioncracking(IGSCC)inthetubesheetcreviceregion;pittingandwastagebetweenthetubesheetandfirsttubesupportplate;dentingatalltubesupportplateintersections;andwearfrettingattheantivibrationbartotubeintersectionsintheU-bendregion.PAGF.1OF30 2.0DATAACUISITIONPROGRAMTheeddycurrentexaminationofthe"A"and"B"steamgeneratorswasperformedutilizingtheZetecMIZ-18DigitalDataAcquisitionSystem.Thefrequenciesselectedwere400,200,100and25kHz,allofwhichwereruninthedifferentialandabsolutemodes.Theexaminationwasperformedprimarilywithastandard0.740"or0.720"O.D.bobbincoil,withsmallerdiameterprobesusedtotraversethesmallerradiusU-bends.Priortoexaminationofthesteamgenerators,aninspectionprogramwasestablishedfortheinletsidesofboththe"A"and"B"steamgenerators.Thephilosophyingeneratingthisprogramistoprovide100%examinationcoverageofeachsteamgeneratortubefromthetubesheetuptothefirsttubesupportplate,alongwith3%ofthesetubesbeingselectedandexaminedfortheirfulllength.Inaddition,allprevioustubeswithindicationsgreaterthan20%throughwalldepthwereexaminedasaminimumtothelocationoftheir'egradation.Table1isabreakdown,bysteamgenerator,ofalltubesexaminedandtotheextentinspected.PAGE2OF30 STEAMGENERATOR"A"1987EDDYCURRENTEXAMINATIONRESULTSPRIORTOCORRECTIVEACTIONEXTENTINSPECTEDFULLLENGTHNUMBEROFTUBES124PERCENTAGE3.8%PARTLENGTHFROMINLETHTS¹1TSPH¹2TSPH¹3TSPH¹4TSPH¹5TSPH¹6TSPH12907775003<1%91.1%2.3%<1%<1%U-BEND¹6TSPC¹5TSPC¹4TSPC¹3TSPC¹2TSPC¹1TSPCCTS<1%SLEEVEDTUBES12.3%TUBESPERMANENTLYPLUGGED1263.8%TABLE1PAGE3OF30 STEAMGENERATOR"B"1987EDDYCURRENTEXAMINATIONRESULTSPRIORTOCORRECTIVEACTION.EXTENTINSPECTEDFULLLENGTHNUMBEROFTUBES103PERCENTAGE3.2%PARTLENGTHFROMINLETHTS¹1TSPH¹2TSPH¹3TSPH¹4TSPH¹5TSPH¹6TSPH0272420500383.8%<1%<1%<1%U-BEND¹6TSPC¹5TSPC¹4TSPC¹3TSPC¹2TSPC¹1TSPCCTS<1%<1%<1%<1%SLEEVEDTUBES2016.2%TUBESPERMANENTLYPLUGGED2016.2%TABLE1(CON'T)PAGE4OF30 0DATAANALYSISRESULTSSUMMARYTheinitialandindependentreviewdataanalysiswas'erformedusingtheZetecDDA-4DigitalDataAnalysisSystem.Edition18.1Rev.4.2ofthedataanalysissoftwarewasusedtoanalyzedatafromtheMIZ-18digitaldataacquisitionsystem.Thissystemprovideson-linedatadigitizationandstorageontoamagneticdatacartridge.Alldigitaldata(upto8channels)issentdirectlytotheHP-9836computerfromthedatacartridge.Amessageblockisavailableshouldanycommentsbedesiredduringdataacquisition.Alldatacartridgeswerereviewedbydisplayingthe400kHzdataontheCRTalongwiththeverticalcomponentofthedifferentialandabsolutemixoutputsinstripchartform.Otherfrequenciesandtheircomponentswereselectedasneededforfinalresolution.Allrecordableindicationswereloggedintothecomputerandstoredonfloppydisk.Thefinalreportformsummarizingallcreviceand>20%throughwalldimension(TWD)indicationsforeachsteamgenerator(inletandoutlet)canbefoundinthissection.Anexplanationoftheabbreviationsandnomenclatureusedontheselistshasbeencompiledforeaseofinterpretation.Table2hasbeencompiledtoshowalistofthetotalnumberofdentsateachaxialelevationandTable3isabreakdownofdefectsbypercentTWD.Thedentindicationsonthistableareonlythosewithsignalamplitudeof5voltsandgreater,whichwouldapproximateabouta.0025"dentonthediameterofthetube.PAGE5OF30

'LISTOF)20%INDICATIONANDCREVICEINDICATIONNOMENCLATUREToofListInformationSG-SteamGeneratorandLeg(ie:1=A,2=Band1=Inlet,2=Outlet)ROW-ROWnumberfromthetubeidentification.COL-Columnnumberfromthetubeidentification.VOLTS-P-amplitudeofthemeasuredindicationsignalresponse.%TWD-PercentthroughwallfromO.D.basedonmeasuredsignal.CH¹-Channelfromwhichindicationwasdetermined.LOCATION-Locationofindicationrelativetotubesheetorsupportplate.InformationUnder%<20-Measurableindicationlessthan20%throughwall.SQR-Multipleindicationsinterferringwithadepthdetermination(IGA-SCC).XX-Themeasurepercentthroughwallofthedeepestpenetration.IGSCC-IntegranularStressCorrosionCracking(SCC)ADS-AbsoluteDriftSignalIndicativeofIGA.IGA-IntergranularAttackWAS-WastageInformationUnderCH¹1-Indicationdeterminedandmeasuredwith400kHzdifferentialforfinalinterpretation.M2-Indicationdeterminedwithabsolutemix,depthcannotbeaccuratelydetermined,butbaseduponamplitudeisfelttobeabove40%IGA.PAGE6OF30 LISTOF)20%INDICATIONANDCREVICEINDICATIONNOMENCLATURE(CON'T)InformationUnderLOCATION/ELEVATIONHTSSF-Secondaryfaceofinlettubesheet.TSP-TubeSupportPlateCTSSF-Secondaryfaceofoutlettubesheet.AVB-AntivibrationBars-XX.X-Depthbelowthesecondaryfaceofthetubesheetorsupportplateswheretheindicationislocated.+XX.X-Heightabovethesecondaryfaceofthetubesheetorsupportplatewhereindicationislocated.H-HotLegC-ColdLegPAGE7OF30 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as<<sRALETUQAN<PHl(VCR.4.0)toenailHondayPlant:'GINNAOutage-RGE-87A2ylOPTooslbAHtwsoooQAlcMKoKcQooeoeoPageSteamGenecatoc:AQUERY:ALLDEFECTS><<19ITWi>ALLVOLTS>ALLELEV<ALLTUE<ES)gALL-SLRO(J-COL"OUTAGEELEVATIONINDICATION/TWVOLTS12-73RGE-87A8-7nRGE-87AHTSSF+1.2O"ODWASTAGEHTSSF~1.1O"ODWASTAGEPAGE10OF30 aaaaaaRCLCTURAM<TW)IVCR4.0)aaaaaa1P1ant-GINNAOutage:RGE-87BCrCabvL)any27'007OJ)50RHaaaaaaQA.LWILCOXCO,aaaaaaSteamGeneratar'Pa.geQUERY:ALLDEFECTS)>1'9/TWTIALLVOLTS)ALLELEV(ALLTUBES)7ALL-SLRQW-COLOUTAGEELEVATIONINDICATIONTNVOLTS18-18-18-ll-18-il-li-21-9-12-lf-28-17-20-'78-~f-~,819-20-24-28-29-iZ->1->6-Zf-40-39-Q46-20-i4-Z6-'-&1ll-1-16-19-U9-li-%711->6-iO-42-4.5667788151520202425252525262626262728Zia4a44040414142424244444445464647484848495050515254555657RGE-87BRGE-87BRGE-87BRGE-87B,RGE-87BRGE-87BRGE-87BRGE-87BRGE-87BRGE-87BRGE-87BRGE-87BRGE-87BRGE-87BRGE-87BRGE-87BRGE-87BRGE-87BRGE-87BRGE-87BRGE-87BRGE-87BRGE-87BRGE-87BRGE-87BRGE-87BRGE-87BRGE-87BRGE-87BRGE-87BRGE-87BRGE-87BRGE-87BRGE-87BRGE-87BRGE-87BRGE-87BRGE-87BRGE-S?BRGE-8?BRGE-87BRGE-87BRGE-87BRGE-87BRGE-87BRGE-87BRGE-87BRGE-87BRGE-87BRGE-87BRGE-87BRGE-87BRGE-87BRGE-87BRGE-87BRGE-87BRGE-87BRGE-87BRGE-8?BRGE-87BRGE-87BRGE-87BRGE-87BHTSHTSCiClC2HTSMTSHTSCiHTSKTSHTSHTSHTSHTSMTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSCTSHTSHTSHTSMTSHTSHTSHTSHTSHTSHTSMTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSSFSFSFSFSFSFSFSFSFSFSFSFSFSFSFSFSFSFSFSFSFSFSFSFSFSFSFSFSFSFSFSFSFSFSFSFSFSFSFSFSFSFSFSFSFSFSFSFSFSFSFSFHTSHTSHTSHTSHTSSFSFSFSFSFHTSSFHTSSFHTSSFHTSSF18.wO"18.30"18.ZO"18.20"17.30"17~10"17.~~0"1.40"1.00"f10"18.60"1~20"IIQ()ll18.20"f770"17.90"1.40"1.50"15.50"1gW()II1.20"14.60"15.~0"8.40"18.50"7.60"570IIc()II18MOII1.50"18.20"1.50"0.70"i5.30"12.80"5.70"18.50"14.90"1910"17.70"17.20"16~90"16.20"17.70"14.40"ia.wO"9.50"80II18.10"."".60"R.10"16.90"16.90"~~0II18.10"ODODODODODODODODODODODODQDODQDQDODQDODQDODODODODODODODODODODODODQDODODODODODODODODODODODODQDODQDODODODODODQDODODODODODODODODODODODSCCSCC<general)(general><gener.al>SCCSCCSCC<general>SCCSCCWASTAGEWASTAGEWASTAGESCCWASTAGENASTAGEWASTAGEWASTAGESCCSCCSCCWASTAGEWASTAGEWASTAGESCCSCCNASTAGESCC(general)SCCSCCSCCSCCSCCSCCWASTAGESCCNASTAGEWASTAGEWASTAGESCCSCCSCCSCCSCCSCCSCCSCCSCCSCCSCCSCCSCCSCCSCCSCCWASTAGEWASTAGEWASTAGEWASTAGESCCSCCWASTAGESCC5c'7a4C')9727674722227422262~v681657628905767~i859nBB80a97'9812w'1977750968477789477BS85$68513571r)5'722296500.991.491.~~2i.v91.371.851.58f.7.1..>"2.994~275~961~951.955.09pV~~iO7.060.610.721~466.7a4.y67.00i.y20.Z72~'990.692.031~460.580~752.551.292~3~i3~551.6a~i.21Z.62v.160.380.450.512.032.57<a.902.594.560~580.400.901~74l.On2~742~453.040.600.941.040.611.25l.421.95PAGEllOF30

ttltolROLCTUQAH(TH><VCR,O,O)tttttoFrIdkyFobruary27'09704F00PH~tttttQAQCOCKLWILCOXCO.ttttttP1ant:GINNAQutacIe:RGE-878SteamGenerator'-8QUERY'LLDEFECTSy)1P/TNyyALLVOLTSyALIELEV(ALLTUBES)yALL-SLROW-CQLOUTAGEELEVATIONINDICATIONTNVOLTS1-35-36-8-Z38-28-Z8-36-ll-27Cg'77-~88-'97-8-4-17-14-9-58585859616363646464656567697275757577777878797'7808284848586868689RGE-878RGE-878RGE-878RGE-878RGE-878RGE-878RGE-878RGE-878RGE-878RGE-878RGE-878RGE-878RGF-878RGE-878RGE-878RGE-878RGE-878RGE-878RGE-878RGE-878RGE-878RGE-878RGE-878RGE-878RGE-878RGE-878RGE-878RGE-878RGE-878RGE-878RGE-878RGE-878RGE-878RGE-878RGE-878RGE-878HTSHTSHTSHTSHTSHTSHTSHTSHTBHTSHTSHTSHTBHTSMTSHTSHTBHTSHTSHTBHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTBHTSHTSHTSHTSBFSFSFSFBFSFSFSFBFSFSFSFSFSFSFSFSFSFSFSFBFSFSFSFSFSFSFSFSFSFSFSFSFSFSFSF17.60"17c(}II18.40H16.30"18~70H0.50"1.60"1"90"OOHl.70"15001.70"f8.0"1750"18.30"17.40"15.90"17.40"16.80"17.40"17.70"1750"16~10"17.20"17.60"1640"18.fo"17.80"17.40"18ao"18.20"19.00"18.80"f8WOII1890"QDODODODQDODODODODODODODODODODQDODODODODQDODODODODODODODODODODODODODQDODSCCSCCBCCSCCSCCWASTAGEWASTAGESCCWASTAGEWASTAGEWASTAGEWASTAGESCCSCCSCCSCCSCCSCCBCCBCCBCCSCCSCCSCCSCCBCCSCCSCCBCCSCCSCCSCCSCCSCCSCCSCC758597909622Pf70Vf597394668987928683839984978183474775731.40i.'O,0.830.60i.190.873~200.665.383~364.195~592~224.841.51It031.162.5710.961.071.0'73.451.09571.840~881.191.80i.144.49jt25.23V.104.833~376.82PAGE12OF30 DENTTABLEFEBRUARY1987INSPECTIONSTEAMGENERATOR"A"ELEVATIONDENT(VOLTS)1.2.3.4,5.6.7.8.9.10.11.12.13.14.15.16.17.18.19.20.21.22.23.24.25.26.27.28.29.30.31.32.33.34.35.36.37.38.39.40.41.HTSPFHTSMIDHTSSFHTS-HlHlHl-H2H2H2-H3H3H3-H4H4H4-H5HSH5-H6H6>H6AVB1>AVB1AVB2>AVB2>AVB3AVB3>AVB4AVB4>C6C6C6-C5CSC5-C4C4C4-C3C3"C3-C2C2C2-ClClCl-CTSCTSSFCTSMIDCTSPFOTHER<100519039532000000010000000000400010001010200010-<20028838508000001030000000000400010102010000020-<30006040>=300000280100000304000010000000TOTAL072846248316000004011000000000090002010402.02000TOTALS:PERCENT:30851.419933.2559.2376.2599TABLE2PAGE13OF30 DENTTABLEFEBRUARY1987INSPECTIONSTEAMGENERATOR"B"ELEVATIONDENT(VOLTS)1~2.3.4.5.6.7.8.9.10.11.12.13.14.15.16..1718.1'9.20.21.22.23.24.25.26.27.28.29.30.31.32.33.34.35.36.37.38.39.40.41.HTSPFHTSMIDHTSSFHTS-H1H1H1-H2H2H2-H3H3H3-H4H4H4-HSH5H5-H6H6>H6AVB1>AVB1AVB2>AVB2>AVB3AVB3,>AVB4AVB4>C6C6C6-CSCSC5-C4C4C4-C3C3C3-C2C2C2-C1C1C1-CTSCTSSFCTSMIDCTSPFOTHER<100020444000000000.53000000000010000000000000010-<20021110700000000000000000000000000100000000020-<30001207000000000000000000001000000000000000>=3000301200000000000000000.,0001000000000000000TOTAL02330430TOTALS:PERCENT:22158.512031.7215.64.2378TABLE2(CON'T)

DEFECTTABLEFEBRUARY1987INSPECTIONSTEAMGENERATORADefects(Inlet)0-19%TW32520-39%TW9840-49%TW050-100%TW15SQRDefects(Outlet)0-19%TW420-39%TW840-49%TW050-100%TW0ADS17U-Bend0-19%TW020-39%TW240-49%TW050-100%TW0Defects(Inlet)0-19%TW16020-39%TW2740-49%TW450-100%TW64SQR10STEAMGENERATORBDefects(Outlet)0-19%TW320-39%TW540-49%TW050-100%TW0ADS72PAGE15OF30 4.0iOBSERVATIONSTheresultsoftheexaminationindicatesthatintergranularattack(IGA)andintergranularstresscorrosioncracking(IGSCC)isstillactivewithinthetubesheetcreviceregionsontheinletsideofeachsteamgenerator.TheIGA/IGSCCisprimarilylocatedinthe"B"steamgeneratorwith153totalindicationsdetected.Inthe"A"steamgenerator34indicationsweredetected.Table4showsthesteamgeneratorIGAhistory.GINNA'SSTEAMGENERATORSCREVICECORROSIONINDICATIONHISTORYB-SteamGenerator(A-SteamGenerator)NotSizeable0-25%26-50%51-75%76-100%A-S/GB-S/GTOTALTOTALMarch19790December19790April198019November19802April19810February19821October198227April198311(3)March198'45March198523February19863(2)February198782(17)3(1)9(2)150(1)s(1)7(1)9(1)14(1)16(3)161527(1)2546(13)(0)(0)(0)(0)(0)(0)(4)(2)(5)(34)31141359516952153TOTALS173(22)27(3)4s(2)80(6)138(14)(47)466TABLE4PAGE16OF30

<J Thecauseoftheinlettubesheetcrevicecorrosionindicationsisintergranularattackandintergranularstresscorrosioncrackingofthemil-annealedInconel600tubematerial.Thisformofcorrosionistheresultofthetubesheetcrevicesforminganalkalineenvironment.Thiscreviceenvironmenthasdevelopedovertheyearsasdepositsandactivespecieslikesodiumandphosphate,havereacted,changinganeutralorinhibitedcreviceintotheaggressiveenvironmentthatpresentlyexist.Alargevolume,typically<20%TWD(ThroughWallDimension)wastagetypeconditionexistsjustabovethetubesheetsecondaryface.Asmallpercentageofthetubes,generallytowardthecenterofthebundle,havethiscondition.Severalofthesetubesdidhavepenetrations>20%TWD.Thesetubeswereaffectedbytheoriginalwaterchemistryconditionswhenphosphatewasusedasabufferingmediumandhavenotseenfurtherdegradationsince1975.Smallindicationsofprobablecopperdepositswerealsofoundinthetubesheetcreviceregionrandomlylocatedthroughouteachsteamgenerator.BasedonstudiesperformedwithcopperplatedonInconeltubingandthephaserelationshipsofthesesignalresponsesatthedifferentinspectionfrequenciestheindicationscanbeattributedtocopperdepositsandnotadefectcondition.Minordentinghasbeendetectedatthetubesheetsecondarysidefaceformanyyearsinbothsteamgenerators,primarilyontheinletside.Dentingwasalsodetectedatthe1st,2ndand6thtubesupportplatesrandomlythroughoutthegenerator,andinmostcaseswasofgreatermagnitudeinsize.Notubeswerefoundwhichobstructedthepassageofa0.720"O.D:probe.Ingeneral,minordistortionsofmostofthetubesupportplatesignalswereseen.PAGE17OF30 4.0OBSERVATIONS(CON'T)Thedentingphenomenonandminordistortionsatthetubesheetandsupportplatescanbeattributedtosecondarysidecorrosionproductbuild-upintheannularregionbetweenthetubeoutsidesurfaceandthecarbonsteelsupportmember.Comparisonswithpreviousdatadoesnotindicateanychangeintheextentormagnitudeofdentingfromwhathasbeendetectedbypreviousinspections.Severalindicationsweredetectedinthecoldlegsofthe"A"*"B"steamgeneratorsinandaroundtubeR23-C46.Areviewofpreviousyearsdatarevealedtheseindicationstobepresent.TheyappearasashallowIDindication<20%whichwereconfirmedvisuallytobeanexpansionofdiameterwithinthetubesheet.Thiswascausedbyacam-lockexpansiondevicewhichwasusedinearlieryearstosuspendleadblanketsfromthetubesheetprimaryface.Insummary,the"A"SteamGeneratorhadthirtyfour(34)tubesthatwerefoundtohavetubesheetcreviceindications.The"B"SteamGeneratorhadonehundredfiftythree(153)tubesheetcreviceindications.Onetubeinthe"A"SteamGeneratorhadtwo(2)indicationsatthethirdandfourthanti-vibrationbarintersections.Theseindicationsaregreaterthan20%butlessthantherepairlimit,andhavenotchangedsincethe1986Inspection.Thistubewillbere-examinedatthenextinspectiontodetermineifthereisanactivefrettingweardamagemechanismgoingon.Inlightofthefactthatonlythistubeexhibitstheseindications,AVBfrettingwearisnotamajorconcern.PAGE18OF30 5.0CORRECTIVEACTIONTable5hasbeengeneratedtoidentifythetubeswithcreviceindicationsorwithindicationswhichexceedtherepaircriteria.Thistablealsoshowsthelocationandaxialextentoftheindicationandwhatcorrectiveactionwastakenonthesetubes.AlltubesrequiringrepairhadhotlegtubesheetcreviceindicationswhichwereidentifiedbyanabsolutedriftsignaloftheMix-2Channeland/orquantifiableintergranularstresscorrosioncracking(IGSCC)indicationsbythe400kHzdata.Severalsquirreltype(SQR)indications,multipleIGSCC,werealsoidentifiedandhavebeenplacedonthelistoftubesrequiringcorrectiveaction.Atotalof24sleevesand10plugswereinstalledintothe"A"steamgenerator.The"B"steamgeneratorrequiredatotalof80sleevesand73plugstobeinstalled.Oneplugisattributedtoasleeveinstalledthisoutagewhichhadtoberemovedfromserviceduetounacceptableultrasonicexaminationresultsoftheupperweld.AspartoftheInspectionProgramforthe"B"steamgenerator,a750PSIHydrostaticPressureTestwasperformedfromthesecondarysidetolocateanytubes,sleevesorplugswhichwereleaking.Theresultsofthevisualexaminationofthe"B'otlegtubesheetduringthehydroindicatedthat2tubes,21980TestSleeves,11WestinghouseExplosivePlugs,andoneCE.Mechanicalpluginthecoldlegwereidentifiedasleaking.The2tubesidentifiedwereconfirmedbyeddycurrenttestingtohavehighpercentthroughwallindications()80%TWD)inthemidspanofthehotlegtubesheetwhichareprobableintergranularstresscorrosioncracks(IGSCC).Fiveoftheexplosiveplugsweredrilledoutandreplacedwithawelded"TopHat"plug.Theremainingsixexplosiveplugswereleftinserviceastheirleakageratewasextremelysmall.TheCEMechanicalPluginthecoldlegwasremovedandreplacedwithanotherCEMechanicalPlug.PAGE19OF30 CORRECTIVEACTION(CON'T)~'he2sleevesidentifiedasleakingwereB*W36"BrazedSleeveswhichwereinstalledin1980aspartofatestprogram.Aneddycurrentinspectionusingannulardifferentialmagneticbiasprobewasperformedonthesesleevesandthe3othertestsleevesinstalledin1980,inadditiontothe20%randominspectionofallsleevesinstalled.Theresultsofdataanalysisforthesleevesofthebraze/expansionregionsaswellasthelowerrolltransitionsrevealednodetectabledegradationordeviationfromtheeddycurrentsignatureseenintheothersleevesorfromthe1986InspectionData.Anultrasonicinspectionofthebrazeregions,performedin1983,showedthatthebrazedbondingofthesleevetotheparenttubemarginallymettheacceptancecriteria.Atthattimeitwasresolvedthatthesesleeveswouldbeconsideredleaklimiting,nothermeticallysealed,andbeleftinserviceuntilleakagewasdetected.TheanalysisfortheparenttubeshowedthatTube21-47hasadeepIGSCCindication(estimatedat94%TWD)andTube24-47hasthreedeepIGSCCindications(deepestestimatedat97%TWD)locatedinthemidspanofthetubesheetregion.Areviewofthe1986Datafortheseparenttubesalsorevealedtheexistenceofthesedeepflaws.Anincreaseinthevolume(basedontheamplitudeofthesignals)wasnotedwhencomparingthe1987tothe1986data.Basedonthedetectionofathroughwalldefectintheparenttubeandthebrazeconditionofthesleeve,existenceoftheprimarytosecondaryboundaryleakhasbeenconfirmed.These2sleeveshavebeenremovedfromserviceusingaB*Wexplosiveplug.PAGE20OF30 RO),glTUQAN<TH)(VCR\Plant:GINNAl.0)semessTueadayuawy21)JOQ704)lop))soooooEIARccc)r.I00x00oaoasoPa8e"SteamBenevatav-AREPORT-TUBESREQUIRINBCORRECTIVEACTIONROWCOLVOLTSDEGINDCHNLOCATIONCOMMENTSEXTENTTAPEPRBil11111i.il1111liiliiii1111il11111111li11ii11llll1111lill1111111111illl1124,21202121278li18391521151*263117171930<<>~r88821510101315192020262834353636373846505151535454545455616566676869711.730.721~082~Si1.001.733~221.560.818.851~70.551.250.433~8'90.79a.Oi3.216.397.Si2~253.542.863~550~555.400.711.741~941.69.892~984~934.052~2766601$65158415781534735431296135266873040517647607492745PP93170798084ADS7486ADSADS928077ADSADS90ADS90ADSADSSQRADS9485ADS907<<>ADS84SQR76ADSADBADS72ADSADSADS27MMMMMMMMMI'IMMMI'IMMMMMMMMMMMMMMMMMMM111221121122211222122HTBHTSHTSHTSHTSHTSHTSHTSHTBHTSHTSMTSHTSHTSHTSHTSHTBHTSHTSHTSHTSHTSHTSHTSHTBHTSHTSHTSI-ITSHTSHTBHTSHTSHTSHTSHTS18.117.318.215.018.115.114.317~817.917.?17~116.713.7iS.213.218~011.117.918~23~111~01$.117.018.616.49.7]4~2r14.313~0lb.417.018~415.518.116~817~1PLGPLGPLGPLGSLVSLVSLVSLVSLVSLVSLVSLVPLGSLVPLGPLGPLGSLVSLVSLVPLGSLVSLVSLVSLVSLVSLVSLVPLGSLVSLVSLVSLVSLVSCCBCCIBASCCSCCISAIBASCCSCCSCCIGAIBABCCIGASCCIGAIGASCCIGABCCSCCIGASCCSCCIGASCCSCCIGAIGAIGAIGASCCIGAIGAIBAIGA¹1¹1¹1¹1¹1¹1¹1¹1¹1¹1¹1¹1¹1¹1¹1¹1¹1¹1¹1¹1¹1¹1¹1¹1¹1¹1¹1¹1¹1¹1¹1¹1TSPTBPTSPTBPTSPTSPTSPTSPTSPTSPTSPTSPTSPTSPTSPTBPTSPTSPTSPTSPTSPTBPTSPTSPTSPTSPTSPTSPTSPTBPTBPTBPTSfiF/L¹1TSP¹1TSPMHHHHHHHHHHHHHHHHHHHH,HHHHHHHHHHHHH888888811122447744444485556674074C)740740740740740740740740700740740740740740740740740740740740740740740740740740740740740740700740740TABLE5PAGE21OF30 STEAMGENERATOR"A"TUBESRECEIVINGCORRECTIVEACTION-FEBRUARYf987PLANT'INNAGENERATORATOTALTUBES:3260S~CEET'LEEYES(24)P~CEPLUSS(io)TOTALTlSESASSISNHL34rph-esloK-Ro-joIIIIIRINLET(HotLeg)-PtiaeryFeceIIIIIIIIIIIII3I8IR)'IRLCOLSSSNANfAY

~<<tROLETUSAN(VN)<VCR<<O)tt<<<<ttHond<<y~2i(OQtIPlant:i'SINNAOQs2BAt1<<ttttt()AQcoQK(o)(co,ttttttPageSteamGenevata(--BREPORT-TUBESREQUIRINGCORRECTIVEACTIONSGVOLTSDEGINDCHNLOCATIONCOC'IMENTSEXTENTPRB2121212121212121212121nj2a2a21212j.212121212f2121212121212121~a21212121212f2121nj21212121212121nj1118al51r)815211249J18181814828ns382821362131122140,9926323363463a111161'9116i9llns367781313131414141515161.6161*161818182024242525253434p73738u'94n4242444444454545464*47484s48495051525454540.991.491.851.581.722~471321~491.841.801.994,274.481.612.50571..14~621.833.112.86233'4t5o4.733.481.950.610~71.461.0~0.370.691.460~580.752~551.29r).512.3r)5,2(.)1.34ot331~630.380.450.512.Ou2-5?0.90.'.~3(.)4.56.58(.l400.901.741.042.748.27r)...91.40O.612.565.771916744517812813414662138612041011101151769174143*7113n91928656677874385865158+3lub1565Q20501663757858748408684z9308ul465017658010.6045304655478397ADSADSADSADBADSADS6747ADSADBADSADSBQRADSADSADBSQRADSADSSQRADSADS758165769057678588soSQRADSADSADS6798197775096847778ADSADS947?88858685~571SQRSQRADS94ADBADSN1raa11t'I2t'I2t'ICC2N2rc2N2t"I2t'I2M2N2M2M2M22NN2M2N2t'12N2t'I2N1M11t"I1N1N1t'I11M1t"I211NN2N1N2f11N11t'I11N211NM2N2C'I1M1M2MN2Mt11N2t'I1t'I2M1CI2C'I2HTSHTSHTBHTSHTSHTSHTSHTSKTBHTSHTSHTSHTSHTSHTBHTBHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTBHTBHTSHTBHTSHTSHTSHTSHTSHTBHTSHTSHTSHTSHTSHTBHTSHTSHTBHTSHTBHTBHTBHTSHTBHTBHTSHTBHTBHTSHTSHTSHTSHTSHTSHTSHTSHTSHTB18.>ls.~18~318.217.3lb.817.7j.*.917.216.917~717.j.a?a317.617.617.517.517.813.417.71.8~517~017.7j.b.(.)16.3lb.916.518.618.217.717.915~514.*8.418.57.65.718.516.u1616.615.218.=is.=12.85<<718.514.919.117.717.117.617.216.916.217.714.413.39~518.j.15.018.19.016~916.416.7PLGPLSPLGPLSPLGSLVSLVSLVSLVBLVPLSSLVPLSPLGSLVPLSPLGPLGSLVSLVPLGSLVBLVPLGBLVSLVSLVPLGPLGPLGPLGPLGPLGSLVSLVPLGSLVSLVSLVSLVSLVPLGBLVBLVPLGPLGSLVSLVSLVSLVPLGPLGPLSSLVF'LGPLSSLVSLVSLVPLGSLVSLVSLVSLVSLVSLVSLVBLVSLVPLGSCCBCCSCCSCCSCCIGAIGAIGAISAISAIGASCCSCCIGAIGAIGAIGABCCIGAIGAIGASCCIGAISABCCIGAISABCCSCCBCCSCCBCCSCCSCCBCCSCCSCCSCCSCCSCCIGAIGAIGASCCSCCSCCSCCSCCSCCSCCSCCSCCSCCIGAIGABCCSCCSCCSCCSCCBCCSCCSCCBCCSCCSCCIGASCCIGAISANlTSPNaTspNiTBPNiTSPNaTSPNj.TSPNlTSPNlTSPN1TSF'iTSF'iTSPNlTSPNiTSPNlTSPNiTBPNiISPNaTspNlTSPF/LNfTSPF/LNjTSPNaTSPNlTSPNlTSPNlTBPNlTSPNiTSPNaTBPNiTSPNfTBPNlTSPIt:aTspF/LNiTBPF/LNlTSPNlTSPNaTBPNiTBPNiTSPNfTSPNiTSPNaTBpNlTSPNiTSFN1TSPNlTSPNa'BF'lTSPNlTSPNlTBPNlTBPNlTBPNlTSPNaTBPNiTSPN1TSPNlTBPNlTBPN1TBI='iTSPN1TBF'iTBPNlTSPNlTSPNlTBPNiTSP1TBPTSPHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHKHHHHHHHHHHHHHH101r)1112222222P3444jr)4555555555fJ5b51051051066?r)07VO74074r)74074074074074074074074074V74074074074r)74070074074074r)74(.)74074074074074074074074074(.)74070(.)74(b70074V74074(:)74(.)74074074074070074070074074074074074074070070070074074074074074074074070074070074070074(.)740TABLE5(CON'T)PAGE23OF3I)

,ICO RQI,CTUQ(H(TH>(VCR1alttttttHondtylPIant-GINNAQs(QQToatMAHttttttQAQeaevIeaxeo.tAttttPBBeGenerato(:REPORT<<TUE(ESREQUIRINGCORRECTIVEACTIONROMCOLVOLTSDEGINDCHNLOCATIONCOMNENTSEXTENTTAPEPRE(2121212}212121212f2f2121212f21?12}2}212f2f212}2121212!21212}2}212121212121212}2f1222}21212}2f212f2122n}21212122735.:"62742348~I~4831322438}4283*17364525811m'34133511241824142792426227&227288ngCJ55555555555556575758585858585'95960bv61616161*26364646565656565656666666767676767676868686869696969707070717171727272757575757677777878791.643.46l.913~9}2~39j.251.99'.131.951.402.9(.)3.97l.000.830.602.153.791.194.071.262.44>.193.713.01.664.191.042.224.213.361.894~84l.512~714.113.344~344~253.845~414.76f,.033.522.683.722~301.741.}62.046.074.392~891~694.87i.762.853.982.672~5710~961.281.(j70.833.45l.092.571.84573138401268020354447512256443747251811413956422923584642173928265328l}23}3231535(j272856345437273i4875633511249703874227ADSADSADSADSSQR96ADSADS50ADSADS758597ADSSQR90ADSADSADBSQRADSADS'96ADSSQR91ADBADBADSADS7091ADSADSADSADSADSADSADSADS59ADSADSADSADSADS73ADSADSADSADSADSADSADSADSADSADS9466ADS8987ADS868383ADSNMMMNNMNMMMMNNMMMMMI"II"II"IMMMMNNNMNNNMMMNMMMNMMMMMMMMNNMMMNMMI"IN21211221121222221211212222222212222222121111HTSHTSHTBHTSHTSHTSHTSHTSHTSHTSHTSHTBHTSHTSHTSHrsHTSHlsHTSHTSMrsHTBHTSHTSHTSHTSHTSHTSHTSHTBHTSHTSHTSHTSHTSHTSHTSHTSHTSHTBHTSHTSHTSHTSHTSHTSHTSHTSHTSHTBHTBHTSHrsHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHrsHTSHTS14~613.416.215.316.516.'917.16~018.117.*17~717~617.518.416.317.317.518~717~016.117.217.215.2fB.117~9f6.115.818.3lb.3lb.414~9}3~017~518.313.712.314.316~115.915.9lb.7}5.017.415~6lb.vlb.1lb.116.715~916.7lb.316~516.117.615.7lb.317.416.615.617.416.216.S16~817.4lb.117.717.5lb.117.217~0SLVPLGSLVSLVPLGPLGPLGSLVPLGPLGPLGPLGPLGPLGSLVSLVSLVPLGSLVSLVSIVPLGSLVBLVPLGSLVSLVPLGSLVSLVSLVPLGPLGPLGSLVSLVBLVPLGSLVSLVSLVSLVPLGSLVBLVSLVPLGSLVSLVSLVPLGPLGSLVSLVSLVSLVPLGSLVPLGPLGPLGBLVPLGPLGBLVPLGPLGSLVPLGPLGIGAIGAIGAIGASCCBCCIGAIGASCCSCCIGAIGASCCSCCSCCIGASCCSCCIGAIGAIGASCCIGAIGABCCIGASCCSCCIGAIGAIGAIGASCCSCCIGAIGAIGAIGAIGAIGAIGAIGASCCIGAIGAIGAIGAIGABCCIGAIGAIGAIGAIGAIGAIGAIGAIGAIGASCCSCCIGASCCSCCIGASCCSCCSCCSCCIGA¹1¹1Qi¹1¹1¹1Qf.QlQi¹1Ql¹1¹1¹1Qi¹1¹1¹1¹1¹1¹1¹1¹1QiQi¹1¹1¹1¹6Ql¹1¹1Ql¹2¹2¹f.Qi¹1¹1¹1¹2¹1¹1¹1QlQf¹1¹1Qi¹1Qi¹1Qi¹1¹2Qi¹1¹1¹1¹1¹1¹1Ql¹1¹1¹1¹1TSPTSPTSPTSPTSPTSPHHHHHHlSPTSPTSPTSPTSPTSPTSPTSPTSPTSPTBPlBPTSPTSPTSPTSPTSPTSPTSPTBPTSPTSPTSPTSPTSPTSPTSPTSPTSPTSPTSPTSPTSPTBPTSPTSPTBPTSPTSPrspTSPTSPTSPTSPTSPTBPTSPTSPTSPTSPTSPTBPTSPTSPTSPTSPTSPTSPHHHHHHHHHKHHHHHHMHHHHHHHHCHHHHHHMHHHHHHHHHHHHHHHHHHTSPMTSP"HrspHTSPHTSPHTSP666666666106666fO66*6666661061067777767.7777777777777777777777777777777777874074074074(374074074074074070074074(j74074070074074074074074074v74074074070074070(374074(.)74074074074074074074074'>74(374C>740740740740740740740740740740740740740740740740740740740740740740740740740740740740740740740TABLE5(CON'T)PAGE24nF3tI

~oiRoccTUB4N<vLR.4,0looeoeepkedayhPlant;-GINNA2y!Oilycosmicm~nauccmca~coxco.PageSteamGuetatat-BREPORT-TUBESREQUIRINGCORRECTIVEACTIONCOLVOLTSDEGINDCHNLOCATIONCOMMENTSEXTENTPRB2121212121'1214,p3~7817'1lli1"2797'P8080828484858686Bb87870~88l.191.801.BC)1.144.491.3259.104.8"3~371.53824154438038191'P54402474409984ADB97Bi8"474775cjl273ADS1M1M11M21M2M2M2M2M2HTSHTSHTSHTBHTBHTBHTSHTBHTSHTSHTBHTSHTS17~616.418.117.817.418.318.~19.018.818.~18.318.9SLVSCCBLVSCCPLGIGAPLGBCCPLGBCCPLGSCCPLGSCCPLGSCCPLGSCCPLGBCCPLGBCCPLGIGAPLGSCCQiTSPH01TSPHQ1TSPH41TSPHClTSPHOlTSPH41TBPH01TBPHNiTBPHQlTSPHClTBPH41TSPHQlTSPH88888888740740740740740740740740700700700700700PAGE25OF30 STEAMGENERATOR"B"TUBESRECEIVINGCORRECTIVEACTION-FEBRUARYf987PLANT:GINNAGENERATORBTOTALTUBES'260P~PLU66EO7lSESf987P5)S~CE27'LEEVE(80)TOTALTUBESASSISHED:155PPPPC4o8P3PPPh-2520IV-ca~PPPP-1033$3PIIIII8IZHLETSOL'dg)PPfddPQFdCdCOLWHSHAtlfAVIIIIIIIIIIIIRQ'QRQI)3RR8S8Q TABLE6STEAMGENERATORTUBEINSPECTIONANDCORRECTIVEACTIONHISTORYDATENO.TUBESINSPECTEDPRIMARYTOSECONDARY~LEAKAEE.TOTALTUBESREQUIRINGCORRECTIVEACTIONNO.DEFECTSTYPEOFDEGRADATIONREQU)RINGREPAIR>40%NO.TUBESPLUGGEDNO.TUBESSLEEVEDNO.TUBESPULLEECOMMENTA8HotColdHotColdA8A8A8A8A8INFACTORYAPRIL1972MARCH1974NOV.1974MARCH1975JAN.1976FEB.1976APRIL1976QAPRIL1977JULY1977JAN.1978APRIL1978FEB.1979100102575200326815252683002049204932532517143751714375105032595161098516170143067239217444219314425331923192324732470.005A8/G0.0918S/00.0998S/00.01288/00.060B8/039132215I15001902046llWASTAGEWASTAGECRACKINO/WASTAGEWASTAGEWASTAGECRACKINOWASTAGEIOCRACKINOCRACKINO/WASTAGEIOCRACKINGCRACKINO/WASTAGE2-IOA19130001122ISI58156I001902046110239201513IDEC.1979APRIL1980313932531823750.0078S/01331II-IOA,2-WASTAGE"A"PITTINO/131313I31NOV.1980MAY1981FEB.1982SEP.1982APRIL1983MARCH1984MARCH1985FEB.1986FEB.19873138325313832531375263138382313763331377173135313531346233128TOTALS315137531414003140526312989330968323093963308730873083770288470088/01534171I327810Sff153537"8"IOAIOAIOA.WASTAGEIGA.MECH.OAMIOAIOA.SCCIGA.SCCIOA.SCC.WASTAGEIOA.SCC,WASTAGEIOA.SCC'171452823I3334474I--97049242872763078368101367324802743628120567--161619I3)(4)(5)(6)(7)18)5.21644~41134~I8~41I8~6~3 STEAMGENERATORTUBEINSPECTIONANDCORRECTIVEACTIONHISTORYCOMMENTSFROMTABLE6(1)PulledR15C55andR17C41fromthehotlegandR17C40fromthecoldlegtodetermineIGAconditionsinthe"B"steamgenerator.R17C41andECTindicationsatallfrequencies,R15C44hadjust100kHzAbsoluteECTindicationandR17C40hadnoECTindication.Bothhotlegtubeshadapproximately5096IGA,R17C41hada60%SCCindicationassociatedwiththeIGA.(2)Manuallysleevedfive(5)tubeswithnickelplated-Inconel600thermallytreatedsleeves.ThreetubeshadIGAindications,twootherswerepreventativelysleeved.(3)Sleeved16tubeswithco-extrudedsleeves,13withdefectswith3preventatively.PulledR21C46witha100kHzECTindications,R7C45andR28C45whichwereclean.Alltubespulledwerefromthehotleg.(4)RecoveryfromtheJanuary25,1982TubeRuptureEventincludedremoving26tubesectionsbyEDMandIDCuttersalongwiththeonetubepulledfromthesecondaryside.(5)ThefourtubesidentifiedwithIGAinthe"A"steamgeneratorweresleevedwith22"tubesheetsleeves.The78tubesidentifiedinthe"B"steamgeneratorwithIGAand/orSCCinthecrevicewererepairedasfollows:41tubesweresleevedwith36"brazedsleeves9tubesweresleevedwith28"brazedsleeves24tubesweresleevedwith22"tubesheetsleeves1tubeand2sleeveswereplugged1tubeR34C54waspulledformetallurgicalanalysisTABLE6(CONST)PAGE28OF30 STEAMGENERATORTUBEINSPECTIONANDCORRECTIVEACTIONHISTORYCOMMENTSFROMTABLE6(6)ThetwotubesidentifiedwithIGAinthecreviceinthe"A"steamgeneratorinletweresleevedwith20"tubesheetsleeves.Oneindication>40%TWDin'theU-bendwaspermanentlyplugged.The70tubesidentifiedinthe"B"steamgeneratorwererepairedasfollows:56tubesweresleevedwith20"tubesheetsleeves10tubesweresleevedwith36"brazedsleeves3tubesweremechanicallyplugged(CEremovable)1tubewasexplosivelyplugged1tubewassleevedwitha36"brazedsleeveduetothedominoeffect.(7)Thefivetubesidentifiedwithcreviceindicationsinthe"A"steamgeneratorinletweresleevedwith27"CombustionEngineeringSleeves(CE).OnetubeidentifiedwithgeneralO.D.indicationabovethesecondarysidetubesheetwasalsosleevedwithaCE27"sleeve.The57tubesidentifiedinthe"B"steamIgeneratorwererepairedasfollows:27tubesweresleevedwithCE27"Sleeves27tubesweremechanicallyplugged(CEremovable)3CEMechanicalPlugsinstalledin1985wereremovedandsleevedwith27"sleevesThepresentsleeveinstallationstatusis83brazedsleeves,88tubesheetsleeves,30weldedCEsleevesinthe"B"steamgeneratorwith6tubesheetsleevesand6weldedCEsleevesinthe"A"steamgenerator.TABLE6(CON'T),~PAGE29OF30 STEAMGENERATORTUBEINSPECTIONANDCORRECTIVEACTIONHISTORYCOMMENTSFROMTABLE6(8)The34tubesidentifiedwithcreviceindicationsinthe"A"steamgeneratorinletwererepairedasfollows:10tubesweremechanicallyplugged(CERemovable)24tubesweresleevedwithCE27"weldedsleevesThe153tubesidentifiedwithcreviceindicationsinthe"B'teamgeneratorinletwererepairedasfollows:72tubesweremechanicallyplugged(CERemovable)80tubesweresleevedwithCE27"weldedsleeves1CEweldedsleeve(installedin1987)waspluggedwithaCEweldedsleeveplugduetorejectionoftheupperweld.Otherrepairsrequiredinthe"B"steamgeneratorareasfollows:2BRWtestbrazedsleeves(installedin1980)werepluggedduetothelossoftheprimarytosecondarypressureboundaryasdetectedbyHydroTest.5Westinghouseexplosiveplugsinstalledpriorto1987wereremovedduetoleakageandreplacedwithCEweldedplugs.1CEMechanicalplugonthecoldlegwasremovedandreplacedwithaCEMechanicalplug4CEweldedsleeves(installedin1987),areconsideredleaklimitersduetothemarginalacceptanceoftheupperwelds.TABLE6(CONST)PAGE30OF30

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