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{{#Wiki_filter:RO, | {{#Wiki_filter:RO,CHESTER GASRELECTRICCORPORATION RESEARCHANDSCIENCESDEPARTMENT MATERIALS ENGINEERING DIVISION1986STEAMGHNHRATOR EDDYCURRENTEXAMINATION'SUMMARY REPORTFORR.E.GINNANUCLEARPO)VHRPLANTMARCII1,1986PREPAREDBY:G.L.Henry,NDHTechnician, Materials Engineering LevelIIHTPRHPARHDBY:T.F.SellND~Tecnician,Materials Engineering LevelIIETAPPROVEDBY:A.H.CurtisIII,Manager,Materials Engineering LevelIIIExaminerpgpADOCH,05000g24~4 8 | ||
TABLEOE'CONTENTS | TABLEOE'CONTENTS | ||
==1.0INTRODUCTION== | ==1.0INTRODUCTION== | ||
2.0,DATAACQUISITION PROGRAM3.0DATAANALYSISRESULTSSUMMARY4.0OBSERVATIONS | |||
==5.0 CORRHCTIVH== | |||
ACTION INTRODUCTION Thefollowing reportisasummaryoftheresultsofthemultifrequency eddycurrentexamination performed duringtheFebruary1986AnnualRefueling andMaintenance OutageattheR.E.GinnaNuclearPowerStation.Theexamination wasperformed onboththe"A"and"B"recirculating steamgenerators whichareWestinghouse Series-44 design,containing 3260Inconeltubeshavinganominal0.875"O.D.by0.050"wallthickness. | |||
Theexamination wasperformed byRochester Gas8eElectric(RGRE)personnel thathavebeentrainedandqualified intheeddycurrentmethodtoatleastaLevelIcertification. | |||
Otherpersonnel supportduringdataacquisition wasprovidedbyWestinghouse ElectricCorporation andtheBabcock8zWilcoxCompany(BhW).Theinitialdataanalysisreviewwasperformed byateamofZETECpersonnel. | |||
Anindependent dataanalysisreviewwasperformed byRGhEandB&Wpersonnel subsequent totheZetecanalysis. | |||
Thedataanalysiswasperformed, bybothteams,utilizing theZetecDDA-4DigitalDataAnalysisSystem.Inaddition, Westinghouse ElectricCorporation's Intelligent EddyCurrentDataAnalysisSystem(IEDA)wasutilizedasathirdreviewofthedataaspartofanRG8cEResearchandDevelopment Project.Finalresolutions ofalldataanalysisperformed byRGfkELevelIIandIIIpersonnel. | |||
Thepurposeoftheeddycurrentexamination wastoassessanycorrosion ormechanical damagethatmayhaveoccurredduringtheoperation cyclesinceApril1985.Particular attention wasgiventodetecting intergranular attack(IGA)andstresscorrosion cracking(SCC)inthetubesheet creviceregion;pittingandwastagebetweenthetubesheet andfirsttubesupportplate;dentingandwearfrettingattheantivibration bartotubeintersections intheU-bendregion. | |||
DATAACQUISITION PROGRAM11Theeddycurrentexamination ofthe"A"5"B"steamgenerators wasperformed utilizing theZetecMIZ-18DigitalDataAcquisition System.Thefrequencies selectedwere400,200,100and15kHz,allofwhichwereruninthedifferential andabsolutemodes.Theexamination wasperformed primarily withastandard0.740"-0.720"O.D.bobbincoilwithsmallerdiameterprobesusedtotraversethesmallerradiusU-bends.Priortotheexamination ofthesteamgenerators, aprograniwasestablished foreachleg(inletandoutlet)ofboththe'A"and"B"stean>generator. | |||
Thephilosophy ingenerating thisprogramistoprovide100%%uoexamination ofeachsteamgenerator uptothefirsttubesupportplatealongwithonefifthofthetubesbeingselectedforafulllengthinspection. | |||
Thiswillprovide100%inspection ofalltubeseveryfiveyears.TableIisabreakdown, bysteamgenerator, ofalltubesexaminedandtotheextenttested. | |||
STEAMGENERATOR "A"1986EDDYCURRENTEXAMINATION PROGRAMPRIORTOCORRECTIVE ACTIONEXTENTTESTEDNUMBEROFTUBESPERCENTAGE FULLLENGTH61218.8%PARTLENGTHFROMINLETglTSPH¹2TSPHg3TSPHg4TSPHg5TSPH¹6TSPHSLEEVEDTUBESTUBESPERMANENTLY PLUGGED2240248246012668.7%7.6%0.7%0.2%0,0%0.1%100.0%3.9%PARTLENGTHFROMOUTLET¹1TSPCg2TSPC¹3TSPCg4TSPCg5TSPCg6TSPC0.0%0.0%0,0%0'%0.0%0.3%U-BEND0.0%g6TSPHg5TSPH¹4TSPH¹3TSPH¹2TSPH¹1TSPHHTS200.00000.1%0'%0.0%0.0%0.0%0.0%0'%TABLE1 | |||
STEANGENERATOR "B"1986EDDYCURRENTEXAHINATION PROGRAttPRIORTOCORRECTIVE ACTIONEXTENTTESTEDFULLLENGTtttfUHBEROFTUBES703PERCENTAGE 21.6%PARTLENGTHFROttINLET81TSPHg2TSPHg3TSPHg4TSPHg5TSPHg6TSPH2293141015970.3%0.4%<0.1%0.0%<0.1%1.8%SLEEVEDTUBESTUBESPERNANENTLY PLUGGED171177100.0%5,4%PARTLENGTHFROMOUTLETglTSPCg2TSPCg3TSPCg4TSPCg5TSPCg6TSPC00000630.0%0,0%0.0%0.0%0.0%1,9%U-BEt)D00.0%g6TSPHg5TSPHg4TSPHP3TSPHf2TSPHPlTSPHHTSSLEEVEEND1590,1%0,0%0.0%0.0%0.0%0'%0.0%93.0%TABLE1CON'T DATAANALYSISRESULTSSUMMARYTheinitialandindependent reviewdataanalysiswasperformed usingtheZetecDDA-4DigitalDataAnalysisSystem.Edition18.1ofth'e~dataanalysissoftwarewasusedtoanalyzedatafromtheMIZ-18digitaldataacquisition system.Thissystemprovideson-linedatadigitization andstorageontoamagneticdatacartridge. | |||
Alldigitaldata(upto8channels) issentdirectlytotheHP-9836computerfromthedatacartridge recorder. | |||
Thetubenumberidentification isencodedonthedatacartridge. | |||
Amessageblockisavailable shouldanycommentsbedesiredduringda'taacquisition. | |||
IAlldatacartridges werereviewedbydisplaying the400kHzdataontheCRTalongwiththeverticalcomponent ofthedifferential andabsolutemixoutputsinstripchartform.Otherfrequencies andtheircomponents wereselectedasneededforfinalresolution. | |||
Allrecordable indications wereloggedintothecomputerandstoredonfloppydisk..Thefinalreportformsummarizing allcreviceand>20%%uoTWDindications foreachsteamgenerator (inletandoutlet)canbefoundinthissection.Anexplanation oftheabbreviations andnomenclature usedontheselistshasbeencompiledforeaseofinterpretation. | |||
TableIIhasbeencompiledtoshowalistofthetotalnumberofdentsateachaxialelevation andabreakdown ofdefectsbypercentTWD.Thedentindications onthistableareonlythosewithsignalamplitude of5voltsandgreater,whichwouldapproximate abouta0.025"dentonthediameterofthetube. | |||
SG"A"DEttT&DEFECTLOGFEBRUARY1906INSPECTION INLETOUTLETDEttTS:DENTS:HTS"MIDHTSHTS"1H1H1H-2H2H2H"3H3H3H-4H4H4H-5H5H5H-6H6H>6HAVB1>AVB1AVB2>AVB292426230170001010211710000CTS-tlIDCTSCTS"1C1C1C-2C2C2C-3C3C3C-4C4C4C-5C5C5C-6C6C>6CAVB4">AVB4AVB3>AVB30336051103011700000TOTALDENTS"639TOTALDEtlTS"31DEFECTS:DEFECTS:0-19%20-29%30-39%40-49%5059%60-69%70-79%00-09'%0-100% | |||
416145161001000"19%20-29%30"39%40-49%50-59%60-69%70-79%80-09%90-100%124121000000TOTALDEFECTS-579TOTALDEFECTS"137TABLE2 SG"B"DEttT&DEFECTLOGFEBRUARY1906IWSPECTZOW INLETOUTLETDENTS:DENTS:HTS-tlIDHTSftTS-1H1H1H-2H2H2tt-3H3H3H-4H4H4H-5H5H5H-6)t6H>6HAVBl>AVB1AVB2>AVB263037211000000103600000CTS-ttIDCTSCTS-1C1C1C-2C2C2C-3C3C3C-4C4C4C-5C'C5C-6C6C>6CAVB4>AVB4AVB3>AVB3061040001~0101010621000TOTALDENTS"375TOTALDEttTS-149DEFECTS:DEFECTS:0-19%20-29%30"39%40-49%50-59%60-69%70-79%00-09%90-100%SR265327251312940-19%20-29%30-39%40-49%5059%60-69%70-79%00-89%90-100%751'000000TOTAIDEFECTS"353TOTALDEFECTS"70T~ABLE2~COtl'T LISTOF>20%INDICATION ANDCREVICEINDICATION NOMENCLATURE ToofListInformation SG-SteamGenerator andLeg(ie:1=A,2=Band1=Inlet,2=Outlet)ROW-ROWnumberfromthetubeidentification. | |||
COL-Columnnumberfromthetubeidentification. | |||
VOLTS-P-Pamplitude ofthemeasuredindication signalresponse. | |||
%-PercentthroughwallfromO.D.basedonmeasuredsignal.CH@-Channelfromwhichindication wasdetermined. | |||
LOCATION-Locationofindication relativetotubesheet orsupportplate.INDEX-Locationoftubedataondatadisk.Information Under%11<20-Measurable indication lessthan20%throughwall(IGA-SCC). | |||
>40-Absoluteindication measuredfromabsolutemixwheredepthdetermination couldnotbeaccurately performed (IGAonly).SQR-Multipleindications interferring withadepthdetermination (IGA-SCC). | |||
I~DS-Distorted rolltransition indication thatcannotbeconfirmed ormeasured. | |||
XX-Themeasurepercentthroughwallofthedeepestpenetration (SCC)withinanIGApatchorarea.TWD-ThroughWallDimension Information UnderCHP1-Indication determined andmeasuredwith400kHzdifferential forfinalinterpretation. | |||
M2-Indication determined withabsolutemix,depthcannotbeaccurately determined, butbaseduponamplitude isfelttobeabove40%IGA. | |||
I1LISTOF>Z0%INDICATION ANDCREVICEINDICATION NOMENCLATURE (COB'7)"Information UnderLOCATIONHTS-Secondary faceofinlettubesheet. | |||
TSP-TubeSupportPlateCTS-Secondary faceofoutlettubesheet. | |||
-XX.X-Depthbelowthesecondary faceofthetubesheet orsupportplateswheretheindication islocated.+XX.X-Heightabovethesecondary faceofthetubesheet orsupportplateswheretheindication islocated. | |||
RG&EEDDYCDRRE))IIt)SFKYIO)I REFORT'ridayfebruary26,)986)2:59FIIPNEIPI.AtlT:RG&E-GIHHAOUTAGE:RG&E1906SGAREPORT:TUBESWITHIt)DICATIOHS 20'4ORGREATERSTEAHGENERATOR It)SPECTED FROHABOTH)IL&Cl.ABWCHTCKSDHGDTSFRTIGAt)GVNDDOBSPRHRPGSLGTPGUBCWTH1&2Anti-Vibration BarWearChatterCrackedSupportPlateDingDistorted TubeSheetFrettingIntergranular AttackHachining GrooveNoDetectable DefectsObstructed Permeability RemovedPlugSludgeTemplatePlugU"BendCrackMallThinningB&WSleeveTapesBLGCPRDHT"DRTDSPIHCSCCt)AGHSYFPGPITSLVSQRTBRUDSWASBulgeCopperDentDistorted RollTransition PlateDistorted TubeSupportIncomplete TestStressCorrosion Cracktlagnetite NoisyTubePermanent PlugPittingSleevedSquirrelToBeRerunUndefined SignalWastageROWCOLVOLTSDEGIHDCHELEVIHCHESCOIIHEHTS EXTENTPSID77888910111314151G1710111214151819121213142121101112131213141717921212317171022222425201.54150202.14162201.52161201.43162212.47158212.81150211.01159214.15151212.66158212.16159213.98149212.91153211.93149222.15162222.77157222.08157223.59159223.30157223.2815522152158234.70158232.70158238.83150234.43156232.56156231~8315G241.84162242.16159244.10161245.23156253.72157253.88146257.55153256.86150252.82161263.04153263.80152262.77159261.27152273.57154273'5314927547)45275.42)51275.63)53272.10156271.68155281,.58160285.)8)532320202023292229232230273020242422242523232329252525202220252332262920262721272530332026242521261HTS1HTS1HTS1HTS1HTS1HTS1HTS1HTS1HTS1HTS1HTS1HTS1HTS1HTS1HTS1HTS1fKS1HTS1HTS1HTS1HTS1HTS1HTS1HTS1HTS1HTS1HTS1HTS1HTS1HTS1HTS1HTSIHTS1HTS1HTS1HTSIHTS1HTSIHTS1HTS1HTS1HTS1HTS1fITS1HTS1HTS1HTSIHTS2.51.92,21.81.92'2.02.02.51.71.61.11.23.12.51.02.02.01.20.92.82.13.23.01.50.91.92.82;82.72~42.32'2.32.90.91.92'1.82.92.32.71.92.71.61.22.11.7¹ITSPH¹1TSPfl¹ITSPH¹ITSPH¹ITSPll¹1TSPH¹1TSPH¹1TSPH¹1TSPH¹ITSPH¹ITSPH¹1TSPH¹1TSPH¹1TSPH¹ITSPH¹1TSPH¹1TSPH¹ITSPH¹ITSPIl¹1TSPH¹ITSP'H¹1TSPH¹ITSPH¹1TSPH¹ITSPH¹ITSPH¹GTSPH¹GTSPH¹6TSPH¹6TSPH¹6TSPH¹6TSP.H¹6TSPH¹6TSPH¹6TSPH¹6TSPH¹6TSPH¹6TSPH¹GTSPH¹6TSPH¹6TSPH¹6TSPH¹6TSP)I¹6TSFH¹6TSPEl¹6TSPH¹6TSPfl¹6TSPH274027402740274027402740274027402'740274027402740274027402740274027402740274027402740274027402740274027402740274027402'14037403740374037403'14037403740374037403'740374037403'1'4037403'140374037403740Hl)ILI)L))IHLHLHLHLHLflLIILflLifLHLHLHl.HlHL)ILHl(HLflLHLHLHLHLHLHLHljHLHLHLHLHL)ILHLHLHLHL)ILHLIILHLHLHLHLHLHL RGKEEDDYCURRENTINSPECTION REPORTFridayFebruary28,198612:59PNPhGE2PLANTOUTAGERAPPORTRG&E"GINNARG&E1986SGATUBESWITHINDICATIONS 204ORGREATERSTEAIIGENERATOR INSPECTED FROI{BOTHHL&CLROHCOLVOLTSDEGINDCHELEVINCHESCO{{I{ENTS EXTENTREELPSID152423242516232324252626202223242628212223251921232526192121222223252639392021262728212122242526272425272020212526262829202129262029293030303131313131313132323232323233333333343434343435353535353535353535363636363637373737373737383836393939393939434445454546474.023.114.733.836.841.524.546.004.495.002.542.373.358.036.026.203.861.483.137.166.203.982.194.473.665'475.223.684.682.154.042.794.924.674.27.262.522.184.213.905.013.253.335.813.674.815.754.804.144.305.963.553.363.894'94.176.706.705.305.495.087.344.624.394'3150153153149155161147145147153161157146149148154153158156152150157143151153155154151155157153157153155157.1227815415415014514815715215815715115614914715114915515815715215615615915881081571129262630252031333126202132303025262020242620322523212225212023202321203321M222226302821252020262127292627242022252121212220252023261HTS1HTS1HTS1HTSIHTS1HTS1HTS1HTS1HTS1HTS1HTS1CTS1HTS1HTS1HTS1HTS1HTS1CTS1HTS1HTS1HTS1HTS1HTS1HTS1HTS1HTS1HTS1HTS1HTS1HTS1HTS1HTS1HTS1HTSIHTS1g4AVB2g3AVB1HTS1HTS1HTS1HTS1HTS1CTS1HTS1HTS1HTS1HTS1HTS1HTS1HTS1HTS1HTS1CTS1CTS1CTS1HTS1HTS1HTS1HTS1HTS1CTS1CTS1CTS1glTSPH+1CTS3.01.31.'81.41.33.72.51.81.61.31.11~72.81.82.51.60.91.12.02.42.21.72.12.22.61.71.22.22.20.91.62.12.61.51.20.00.01.82.31.51.51.02.21.81.62.11.32.11.72.22.31.9F62.21.81.92.02.01.91.315.615.61.91.416.3HASCPRWASCPRWASCPRWASCPRAHASCPRHASWASHASHASHASHASCPRHASWASHASHASWASWASCPRHAS<<P61%ABHABHCPRHASWASWASWASWASWASWASWASHASWASWASCPRHASHAS>>HASWASIDIDIDg6TSPHg6TSPg6TSPH¹6TSPflg6TSPH¹6TSPH¹6TSPH¹6TSPH¹6TSPHg6TSPH¹6TSPHg6TSPHg6.TSPH¹6TSPH¹6TSPHg6TSPHg6TSPf{g6TSPflg6TSPH¹6TSPHg6TSPH¹6TSPH¹6TSPHg6TSPH¹6TSPH¹6TSPHg6TSPHg6TSPHg6TSPH¹6TSPH¹6TSPHg6TSPHg6TSPHg6TSPH¹6TSPHg6TSPHg6TSPHg6TSPH¹6TSPH¹6TSPH¹6TSPHg6TSPHg6TSPH¹6TSPH¹6TSPH¹6TSPC¹6TSPH¹6TSPHg6TSPH¹6TSPI{¹6TSPH¹6TSPfl¹6TSPf{¹6TSPC¹6TSPHg6TSPHg6TSPI{¹6TSPHglTSPHglTSPfl¹6TSPC¹6TSPC<<6TSPCglTSPH¹6TSPH4740HL4740IIL4740'L4740HL4740HL4740HL.4740HI4740HL4740HL4740HL4740HL14720CL4740HL4740HL4740HL4740HL4740HL14720CL5740HL5740HL5740HL5740HL5740HL5740HL5740HL5740HL5740HL5740HL5740HL5740HL5740HL57.40HL5740HL5740HL5740IIL'5720CL15720CL5740HL5740HL5740HL5740HL6740HL15720CL6740HL6740HL6740HL6740HL6740HL6740HL6740HL6740HL6740HL16720CL18720CL16720CL6740HL6740HL6740HL7720HL7720HL18720CL18720CL,18720,CL'720HL22720CL I | |||
RGKEEDDYCURRE))TI)ISPECYIO)j REPORTEridayEebruary28,)98612:59P)fPAGE3PLANTOUTAGEREPORTRG&E-GINNARG&E1986SGATUBESWITHINDICATIONS 204ORGREATERSTEAHGENERATOR INSPECTED FROHABOTHHL&CLROWCOLVOLTSDEGINDCHELEVINCHESCOMMENTSEXTENTREELPSID10.781.005.837.314.412.651.803.135.714.802.710.432.752.261.261.151.652.531.723,193.200.474.742.660.820.820.622.111.530.831.734.191.417.074.354.863.023.483.014.373.153.035.034.406.204.675.293.102.884.582'32.752.924.433.485.443.825.642.281.581.572116262830312026282816232728292916172728131516161717192917171816162215151619211516201917191891913169614679912812'll47484848484849494949505050505050515151515252525353535353545454555557596161616162626263646466676768686970707171727373747691ENDOFDATA10162162158157'62158160153155)5715516116216015615315915316114515815815715813815216015815615215815914915415515614815515515415315115515315214915615415514815415415415015815815315216115525202023242023212725242520202124272227203323232423382821232428232226212020272020212224202223262021202721212125232328292020CTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSfiTSHTSHTSHTSHTSHTSI)TSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTS15.6IDTSP2'1.41.00.90.81.61.60.51.45'10.70.41~60.71.14.50.61.91.31.74.1+5.04.84.83.81.90.93.00.72'4.03'1.72'2.11.41.61.81.91~61.71.41.61.31.80.91.51.62'1.40.92'1.01~21.41.61~11.0WAS¹1TSPHCPRWAS¹1TSPHWAS¹1TSPHWAS¹1TSPHWAS¹1TSPH¹1TSPH¹1TSPH¹3TSPH¹3TSPH¹2TSPH¹ITSPH¹1TSPH¹ITSPH¹1TSPH¹1TSPH¹1TSPH¹1TSPH¹1TSPH¹1TSPH¹1TSPH¹1TSPHTSP¹1TSPH¹1TSPH¹ITSPH¹1TSPH¹1TSPH¹1TSPH¹1'SPfl¹1TSPH¹1TSPfj¹ITSPHWAS¹ITSPH¹1TSPfj¹ITSPfj¹1TSPH¹1TSPfl¹1TSPfl¹1TSPH¹1TSPH¹1TSPH¹1TSPH¹1TSPH¹1TSPfj¹1TSPH¹1CHT¹1¹I¹I¹ITSPTSPTSPTSPTSP¹1¹1¹1¹1¹1¹2¹1¹3TSPHTSPHTSPHTSPHTSPHTSPHTSPHTSPH00.5WAS¹1TSPH1.0¹1TSPH18720CL8720HL8720HI8720HL8720HL8720HL8720HL8720HL8720HL8720HL8720IIL8720f)L0720HL8720HL8720HL8720HL8720HL8720HL8720HL8720HL8720HL8720HL8720HL8720HL8720HL8720HL8720HL8720HL8720HL8720HL8720HL8720HL8720HI9720HL9720I)L9720HL9720HL9720HL9720HL9720HL9720HL9720HL9720HL10720Hl10720HL10720HL10720HL10720HL10720HL)0720HL10720HL10720HL10720HL10720HL10720HIll720HL11720HL11720HL11720HL11720HL12720HL RGREEDDYCURRENTINSPECTION REPORT'"FridayFebruary28,198612:58PNPAGE1PLANT:RG6E-GINNAOUTAGE:RGRE1986,SGAREPORT:TUBESREQUIRING CORRECTIVE ACTIONABW-Anti-Vibration BarWearCHT-ChatterCKS-CrackedSupportPlateDNG-DingDTS-Distorted TubeSheetFRT-FrettingIGA-Intergranular AttackMGV-Machining GrooveNDD-NoDetectable DefectsOBS-Obstructed PRM-Permeability RPG-RemovedPlugSLG-SludgeTPG-TemplatePlugUBC-U-BendCrackWTH-WallThinning162-BRWSleeveTapesSTEAMGENERATOR | |||
:AINSPECTED FROM:HOTLEGBLG-BulgeCPR-CopperDNT-DentDRT-Distorted RollTransition DSP-Distorted TubeSupportPlateINC-Incomplete TestSCC-StressCorrosion CrackMAG-Magnetite NSY-NoisyTubePPG-Permanent PlugPIT-PittingSLV-SleevedSQR-SquirrelTBR-ToBeRerunUDS-Undefined Signal-WAS-WastageACTROWCOLVOLTSDEGINDCHELEVINCHESCOMMENTSEXTENTREEIPSIDSLV22201.56SLV21213.87SLV20224.33SLVll371.28SLV19505.54SLV7780.60ENDOFDATA71UDSM2HTS89721HTS55UDSM2HTS165131HTS128461HTS17381HTS17.218.914.916.51.817.9IGAglTSPHSCC81TSPHIGAglTSPHg6TSPHglTSPHSCCglTSPH2740HL2740HL2740HL6740llL8720HL11720HL | |||
>>XSTEAMGENERATOR "4"TUBESRECEIVING CORRECTIVE ACTION-FEBRUARY2986PLANT:GXNNAGENERATOR: | |||
ATOTALTUBES:3260S>>CE87'ELDEDSLEEVEP>>CEHECHANICAL PLUG~~~~~~~~~~~~~0~~\~~~~~~~~~~~~~3~~~~~~~~~~~.o~~~IIIIIIIClOIllolOOIlIlOoIDCbIoIOIoIllII0ONg)HANWAYINLET(HotLei)-PIinaryFaceNOZZLECOLUHNS-3530A-35IIhIO-30IIV-jo RG&EEDDYCURREj{TIf{SPECTIO{{ | |||
REPORTfridayFebruary28,f98612:26PllPAGE1PLANT:RG&E-GINHAOUTAGE:RG&E1906SGBREPORT:TUBESWITHINDICATIONS 20%ORGREATERSTEAMGENERATOR | |||
:BINSPECTED FROM.:BOTHHL&CLABWCf{TCKSDHGDTSFRTIGAMGVHDDOBSPRMRPGSLGTPGUBCWTH1&2-Anti-Vibration BarWear-Chatter-CrackedSupportPlate-Ding-Distorted TubeSheet-Fretting-Intergranular Attack-Machining Groove-NoDetectable DefectsObstructed | |||
-Permeability | |||
-RemovedPlug-Sludge-TemplatePlug-U-BendCrack-WallThinning. | |||
-B&WSleeveTapesBLGCPRDNTDRTDSPIHCSCCMAGHSYPPGPITSLVSQRTBRUDSWAS-Bulge-Copper-Dent-Distorted RollTransition Plate-Distorted TubeSupportIncomplete TestStressCorrosion Crack-Magnetite | |||
-NoisyTube-Permanent PlugPitting-SleevedSquirrel-ToBeRerun-Undefined Signal-WastageROWCOLVOLTSDEGIHDCHELEVINCHES.COMMENTSEXTENTREELPSID1062.331419216.0615511224.0615320244.001539253.1815315253.1215317255.5114622250.6515624255.9214117265.0814719266.0214524266.1014922274.3515321283.8715523283.8115319297.9915524'05.7415542311.5714417330.8916024341.5614822301.3615341301.0114041381.4915824413.1814431430.6415327454.0715525502.5615323511.0315026511.6414025530.9615323561.1915430562.0615019622.5114922624.1316120622.9015820622.8715330622.2115020632.8814724644.5915526643.5414924652.93155EHDOFDATA35'202222262632233728"312622202220203021272133233222,2026213126272130202226222720~2520HTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSCTSTUBEHTSCTSTUBETUBEHTSHTSHTSHTSHTSHTSHTSTUBEHTSHTSHTSHTSHTSHTSHTSHTSHTSHTStt+ENDtEHDtEHDt++ENDt++++1.71.51.61.32'1.52'1.81.21.21.31.81.61.61.51.415'12.11.51.1546.71.316'1.63'6.90.94.1F62.21.51.51~6I50.92.52.51.82.2g2TSPC+0.0WASCPRCPRg6TSPCglTSPHglTSPHg6TSPflWASg6TSPHWASg6TSPHWASg6TSPHWASg6TSPH¹6TSPHWASg6TSPHWASg6TSPHWASg6TSPHWASg6TSPHWASg6TSPHWASg6TSPHWASg6TSPHWASg6TSPHCPR¹6TSPHHTSCPRg6TSPHWASg6TSPflflTSHTSCPR¹ITSPHHTSWASglTSPHWASglTSPflWASglTSPHWASglTSPHWASglTSPf{HTSWAS¹1TSPHWASglTSPHWASglTSPHWASglTSPHWASglTSPHWASglTSPHWASglTSPHWASglTSPHWASglTSPHWASglTSPH29720CL8740HL8740f{L8740HL9740HL9740HL9740HL9740HL9740HL4740HL4740HL4.740HL4740HL4740HL4740HL4740HL5740HL16720CL1&2610fll6740f{L15720CL1&2610HLI&2610f{L7740fll28610HL8740HL9740HL10740HL10740HL10740HL1&2610HL10740f{L10740HLll740HL11740HL10740HL11740f{Lll720HL11720f{Lll720HLll720HL | |||
RG&EEDDYCURRENTINSPECTION REPORTFridayFebruary28,)98612;21PNPAGEIPLANT:RG&E-GINNAOUTAGE:RG&E1986SGBREPORT:TUBESREQUIRIHG CORRECTIVE ACTIOHSTEAHGENERATOR | |||
:BIHSPECTED FROM:HOTLEGABW.CHTCKSDNGDTSFRTIGA~MGVNDDOBSPRMRPGSLGTPGUBCWTH1&2-Anti-Vibration BarWear-Chatter-CrackedSupportPlate-Ding-Distorted TubeSheet-Fretting-Intergranular Attack-Hachining Groove-NoDetectable Defects-Obstructed | |||
-Permeability | |||
-RemovedPlug-Sludge-TemplatePlug-U-BendCrack-WallThinning-B&WSleeveTapesBLG-BulgeCPR-CopperDHT-DentDRT-Distorted RollT'ransition PlateDSP-Distorted TubeSupportINC-Incomplete TestSCC-StressCorrosion CrackHAG-Maqnetite HSY-HorsyTubePPG-Permanent PlugPIT-PittingSLV-SleevedSQR-SquirrelTBR-ToBeRerunUDS-Undefined SignalWAS-WastageACTROWCOLVOLTSDEGIHDCHELEVINCHESCOHHEHTSEXTENTREELIDPLGPLGPLGPLGPLGPLGSLVSLVPLGSLVSLVPLGSLV340.96102341.0067263.54701160.5245990.586018104.09.608110.0531713'.72978151.315729150.012316172.3605210190.6915730211.14609230.93929231.58006283H56M297184159M2UDS65H172M271H278M2'191801SQRH27MHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTS17.518.017.316.710.316.919.117.37.119.215.317.517.316.014.1SCCSCCSCCSCCPDRTSCCPDRTSCCSCCSCCglTSPHglTSP)I¹1TSPflglTSPHglTSPHglTSPHglTSPHglTSPf)¹ITSPflglTSPHglTSPHglTSPHglTSPHSCCglTSPHSCCglTSPH74074017401740174017402740274027402740274087408740740740HLHLHLf)LHL)ILHLIILHLHL,HI)ILHLHLHLPLGSLVPLGSLVSLVSLVSLVPLGSLVSLVPLGPLG32233.062223240.421352270.364322292,3416329330.409919341.029329341.267238360.95335370.50606370.916035374.034735381.3716064M2421UDSM249169I721831UDSIUDS105104M2SQR1HTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTS16,22'10.51.418.50.318.218.110.417.910.418.3IGAWASPNDDIGAP10%WASCPRSCCRPGSLVSCCCPRIGAIGASCCSCCCPRSCCglTSPHg6TSPH¹6TSPHg6TSPH¹6TSPHg4TSPCg6TSPH¹6TSPH¹6TSPHg6TSPHg6TSPHg6TSPH8944527667767740740740740740720740740740740740740))L)IL)IL))LHLHLHLf)LHLHLHLHLPLG363036380.7956UDS92HTSHTS17.019.2IGA¹6TSPHSCCg6TSPff740740)ILHLPLGSLVPLGSLVSLVPLGSLVSLVSLVSLVSLVSLVSLVSLVUDSUDSUDSMUDSM77565573M7791M76H09MSQRH9038382'50531390'247,42393.706319425.626321421.50861430.6311523460.5911327472.12569480.418611490.305221490.437526490.235531492.561532490.4060HTSHTSHTSfITSHTSHTS)ITSHTSHTSHTSHTSHTS)ITSHTS18.917.216.07.99.916.610.210.017.316.70.218.210.617.1DRTIGAIGAIGARPGSLVSCCCPRSCCSCCSCCSCCSCCSCCSCCSCCg6TSPHg6TSPHg6TSPHglTSPHg6TSPCglTSPHglTSPHglTSPHg)TSPfl¹ITSPH¹1TSPflglTSPHglTSPfl¹1TSPH777727789999999740740740740720740740740740740740740740740f)LHLHLHLIIIHLHLHLHLHLHLHLHLHL RGKEEDDYCURREEITIRSPECTIOR REPORT"'ridayEebruary28,198612:21PlfPAGE2r~IIIPLANT:RG&E"GINNAOUTAGE:RG&E1986SGBREPORT:TUBESREQUIRING CORRECTIVE ACTIONSTEAMGENERATOR BINSPECTED FROM:HOTLEGACTROWCOLVOLTSDEGIND'CHELEVINCHESCOMMENTSEXTENTREELPSIDSlaV7500.73SLV31520.96PLG1532.07SLV21551.32SLV24500.58PLG30503.23PLG38591.00PLG38600.95SLV8691.03SLV9700.70PLG30711.90PLG21761.04PLG22761.15SLV3701.76PLG2806.69PLG19800.61PLG20800.75ENDOFDATA5390700530SQR7403509151790875770100617275777958,9092707202388956914294MIHTS1HTSM1HTS1HTS1HTSM2HTS1HTS1HTSM1HTSM1HTS1HTSIHTS1HTS1HTSM2HTS1HTSM1HTS17.4SCCgfTSP16.3SCC81TSP17.5CHTSCCglTSP5.6RPGSLVg6TSP13.8SCCPfTSP16.9SCCElfTSP10.0SCCfffTSP17,4SCCSfTSP17.7SCC4'ITSP14.6SCCglTSP17.6CPRSCCPfTSP17.4SCCgfTSP17~3SCCgfTSP17.6SCCgfTSP17.9SCCgfTSP16.7SCCgfTSP16.0SCCgfTSPH9740H10740H11720C27720H10740H10740H10740H10740H11720Hll720H12720H12720El~12720H12720H12720H12720H12720HLHf.HlaHLEILHLHLHL'lHLHI.EllaIll.HLHLHLEEL STEAMGENERATOR "B"TUBESRECEIVING CORRECTIVE ACTION-FEBRUARY1986PLANT:GINNAGENERATOR: | |||
BTOTALTUBES:3260S~CE27'ELOEDSLEEVEP~CEKECNANICAL PLUG~~~~P~~~~~~~~~~~~P~P.P~.~PP~~~~~~~P~~~~0~~~~S~~~~~~~~~S''S~~~'S'~~~~~~~0~~~~~~~~~~~SS~~~~~~~'~S~~~~~S~~~~~~~'ES~S~.~ST~S~~-~~.S~I~~~P~~0~~~~~~~~~~~~PE~~P~OIC3IZ20IIVIlCx~IC4JaCOP~~~~P0~P~..'~~~0~3~S~~~~~~~~~~~3~P~~~~~~~~-X5-so~~~P~~~P~PE~.~~~~~P'~P.~~~~~NOZZLEInCIIINLET(HotLeg)-PrimaryFaceIClCIIIRlCIII'ICCICOLUNNSIIICCIICCIIICICOIIOCIIHANKAY OBSERVATIONS Theresultsoftheexamination indicates thatintergranular attackandstresscorrosion crackingisstillactivewithinthetubesheet creviceregionsontheinletsideofeachsteamgenerator.- | |||
TheIGA/SCC,isprimarily locatedinthe"B"steamgenerator with52totalindications | |||
: detected, only5indications weredetectedinthe"A"steamgenerator. | |||
TableIIIshowsthesteamgenerator IGAhistory.GINNA'SSTEAMGENERATORS CREVICECORROSION INDICATION HISTORYB-SteamGenerator (A-SteamGenerator) | |||
March1979December1979NotSizeable0,A-S/G0-25%26"50%51-75%76-100%TOTAL(0)(0)B-S/G'OTAL April198019,1(0)31November1980April1981February1982October1982April1983March1984March19852711(3)5,233(1)1500(1)7(1)1615(0)(0)(0)(4)9(1)27(1)(2)141359513(2)9(Z)114(1)25(5)52Totals91(5)Z6(3)40(l)64(3)92(1)(13)313TABLEIII | |||
Thecauseoftheinlettubesheet crevicecorrosion indication isintergranular attackandstresscorrosion crackingofthemil-annealed Inconel600.Thisformofcorrosion istheresultofthetubesheet creviceshavinganalkalineenvironment. | |||
Thiscreviceenvironment hasdeveloped overtheyearsasdepositsandactivespecieslikesodiumandphosphate, havereacted,changinganeutralorinhibited creviceintotheaggressive environment thatpresently exist.Alargevolume,typically | |||
<<20%TWD(ThroughWallDimension) wastagetypecondition existsjustabovethetubesheet secondary face.Asm'allpercentage ofthetubes,generally towardthecenterofthebundle,havethiscondition. | |||
Severalofthesetubesdidhavepenetrations | |||
>ZOYoTPDandZtubesinthe"B"steamgenerator and1tubeinthe"A"steamgenerator hadapotential | |||
>40%TWDasinterpreted fromthesignal.Therefore thesethreetubesweresleeved.Thesetubeswereaffectedbytheoriginalwaterchemistry conditions whenphosphate wasusedasabuffering mediumand'havenotseenfurtherdegradation since1975.Smallindications ofprobablecopperdepositswerealsofoundinthetubesheet creviceregionrandomlylocatedthroughout eachsteamgenerator. | |||
Basedonstudiesperformed withcopperplatedonInconeltubingandthephaserelationships ofthesesignalresponses atthedifferent inspection frequencies theindications canbeattributed tocopperdepositsandnotadefectcondition. | |||
Amoreextensive condition notedinthesteamgenerators, primarily ontheinletside,istheminordentingatthetubesheet secondary face..Dentingwasalsodetectedatthe1st,2ndand6thtubesupportplatesrandomlythroughout thegenerator andinmostcaseswasofgreatermagnitude insize.Notubeswerefoundwhichobstructed thepassageofa0.7ZO"O.D.probe.Ingeneral,minordistortions ofmostofthetubesupportplatesignalswereseen.Thedentingphenomenon andminordistortions atthetubesheet andsupportplatescanbeattributed to secondary sidecorrosion productbuild-upintheannularregionbetweenthetubeO.D.andthecarbonsteelsupportmember.Comparisons withpreviousdatadoesnotindicateanychangeintheextentormagnitude ofdentingfromwhathasbeendetectedbypreviousinspections. | |||
Severalindications weredetectedinthecoldlegsofthe"A"5"B"steamgenerators in'ndaroundtubeR23-C46.Areviewofpreviousyearsdatarevealedtheseindications tobepresent.TheyappearasashallowIDindication | |||
<20%whichwereconfirmed visuallytobeanexpansion ofdiameterwithinthetubesheet. | |||
Thiswascausedbyacam-loclc expansion devicewhichwasusedinearlieryearstosuspendleadblanketsfromthetubesheet primaryface.Insummary,the"A"SteamGenerator hadfive(5)tubesthatwerefoundtohavetubesheet creviceindications andone(I)tubehadanareaofpreviously detectedwastagethatexceededtherepairlimitintheinlet.The"B"SteamGenerator hadfifty-two (52)tubesheet creviceindications andtwo(Z)tubeshadareasofpreviously detectedwastagethatexceededtherepairlimitintheinlet.Onetubeinthe"A"SteamGenerator hadtwo(Z)indications atthethirdandfourthanti-vibration barintersections. | |||
Theseindications weregreaterthanZ0%butlessthantherepairlimit.Thistubewillbere-examined atthenextinspection todetermine ifthereisanactivefrettingweardamagemechanism goingon.Inlightofthefactthatonlythistubeisexhibiting theseindications, itisunlikelythatfrettingshouldbeofagreatconcern. | |||
CORRECTIVE ACTIONTableIVhasbeengenerated toidentifythetubeswithcreviceindications orwithindications whichexceedtherepaircriteria. | |||
Thistablealsoshowsthelocationandaxialextentoftheindication andwhatcorrective actionwastakenonthesetubes.Otherthancreviceindications, onlythreetubesexceededtherepaircriteria. | |||
One46%TWDindication wasfound1.8"abovethesecondary sidefaceofthehotlegtubesheet ofthe"A"steamgenerator tubeR19-C50.A42%TWDindication wasfoundZ.3"abovethesecondary sidefaceofthehotlegtubesheet, alongwitha49%TWDindication wasfound1.4"abovethesecondary sidefaceofthehotlegtubesheetofthe"B"steamgenerator, tubesR23-CZ4andR22-CZ9,respectively. | |||
ThreeCEmechanical plugswhichwereinstalled inB-S/Gin1985werepulledandinspected fulllengthwiththefollowing results:R19-C34revealeda72%TWD-8.3"fromthetopofthesecondary sidetubesheet face,R21-C42revealeda'7%TWD-9.9"fromthetopofthesecondary sidetubesheet face,R21-C55revealedan83%TWD-5.6"fromthetopofthesecondary sidetubesheet.Allsixoftheabove-mentioned tubesweresleeved"withCombustion Engineering 27"Sleevesandwillremaininservice.TableVhasbeengenerated tomaintainacompletehistoryoftotaltubesinspected totaldefectsdetected, andnumberoftubesrequiring repair. | |||
TABLE41986CORRECTIVE ACTIOtlS"A"SGINLETROWCOLLOCATIONCORRECTIVE ACTION22212011197"B"SGINLET202122375078-UDS(IGA)72UDS(IGA)13468(SCC)HTS-17.2HTS-18.9HTS-14.9HTS-16.5HTS+1.8HTS-17.9CESLEEVECESLEEVECESLEEVECESLEEVECESLEEVECESLEEVEROWCOL1986%LOCATIONCORRECTIVE ACTION336283HTS"17.5HTS-18.0CEMECHPLUG21191867629161830669101113151517192156978459UDS(SCC)6572717819(SCC)88HTS-17.3HTS-16.7IITS-16.3HTS-16.9HTS-19.1HTS-17.3HTS-7.1HTS-19'HTS-15.3HTS-17.5HTS"17.3CEtlECHPLUGCEMECHPLUGCEMECHPLUGCEMECHPLUGCEMECHPLUGCESLEEVECESLEEVECEMECHPLUGCESLEEVECESLEEVECEMECHPLUG2323SQR27HTS-16.0HTS-14.1CESLEEVE322323246442HTS-16.2HTS+,2.3CEMECHPLUGCESLEEVEKEYHTSCEMECHPLUG,CESLEEVESQRUDSIGASCCDRTHOTLEGTUBESHEET SECONDARY FACECOMBUSTION ENGINEERING MECHANICAL PLUG(REMOVABLE) | |||
COMBUSTION E11GINEERING 27"WELDEDSLEEVEMULTIPLESTRESSCORROSION CRACKS(SQUIRRELS) | |||
-NOTQUANTIFIABLE UNDEFItlED SIGNAI.INTERGRANULAR ATTACKDEFECTSTRESSCORROSION CRACKDEFECTDISTORTED ROLLTRANSITION SIGNALASTERISKDENOTESTUBEPLACEDBACKINSERVICEBYREMOVALOFPREVIOUSLY ItlSTALLED CEMECHPLUGSANDTHEINSTALLATION OFACESLEEVE | |||
TABLECON'T1986CORRECTIVE ACTIONSGINLETRONCOL1986%LOCATIONCORRECTIVE ACTIOtt222'9192938563535363627293334343637'737383838UDS49697283UDSUDS8584SQRUDS92(IGA)(IGA)(IGA)(IGA)HTSHTSHTSHTSHTSHTSEITSHTSHTSHTSHTSHTS18.51.418.58.318.218.118.417.918.418.317.019.2CEMECHPLUGCESLEEVECESLEEVECESLEEVECESLEEVECEMECHPLUGCESLEEVECESLEEVECEtkECHPLUGCEMECHPLUGCEMECHPLUG3831421921123279ll212631327311212438383889302122321920383939424243464748494949494950525355585859606970717676'8808080UDSUDSUDSUDS7756557377917689SQR909085SQR8391797581617579907082899194(DRT)(IGA)(IGA)(IGA)HTSHTSHTSHTSHTSHTSHTSHTSHTSIITSHTSHTSHTSHTSHTSEITSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTS18.917.216.07.99.916.618.218.017.316.78.218.218.617.117.416.317,55.613.816.918.017.417.714.617.617.417.317.617.916.716,8CEMECHPLUGCESLEEVECEIIECHPLUGCESLEEVECESLEEVECEMECHPLUGCESLEEVECESLEEVECESLEEVECESLEEVECESLEEVECESLEEVECESLEEVECESLEEVECESLEEVECESLEEVECEMECHPIUG'ESLEEVECESLEEVECEMECHPLUGCEMECHPLUGCEtlECHPLUGCE,SLEEVE CESLEEVECEMECHPLUGCEMECHPLUGCEtlECHPLUGCESLEEVECEtlECHPLUGCEtlECHPLUGCEtlECHPLUG | |||
STEAMGE7KRATOR TUSEINSPECTION AN)CORRECTIVE ACTIONHISTORYDATENO.TUBESINSPECTED PRIMARYTOSEC&5)ARY~LEIUCEEE. | |||
TOTALTUBESREQUIRING CORRECTIVE ACTIONNO.DFFECTSTYPEOFDETERIORATION REQUIRING REPAIR>40%NO.TUBESNO.TUBESNO.TUBESPLUGGEDSLEE~cPULLEDCOIEÃENT. | |||
HotColdHotColdABABA8ABA8INFACTORYAPRIL1972MARCH1974NOV.1974MARCH1975JAN.1976FEB.1976APRIL1975APRIL1977JULY1977JAN,1978APRIL1978FEB.1979319231921003247324710257520032681525258300204932520493251714171437537510503259515109851617014306723921744421931442530F005AS/00.091BS/00.099BS/00.0'12B8/0o.oeoBs/01913000112215I58.155WASTAGEWASTAGECRACKING/WASTAGE WASTAGEWASTAGECRACKINGWASTAGEIOCRACKINGCRACKING)/WASTAGE IDCRACKINGCRACKING/WASTAGE 2-IGAI00IQ020I00190200239201513II150239201513I58I15645ll'611OEC.1979APRIL1980NOV,1980MAY1981FEB.1982SEP.1982APRIL1983MARCH1984MARCH=1985FEB.198531383253138325313752531383823137633,3137717313531353134.523315131413,14031293096309330873083E375400525893832953308777031393253'I823750.007BS/0700BS/G133131515327810e75411-IGA.2-WASTAGE "A"PITTING/"B"IGAIGAIGA,WASTAGEIGA,MECH.OAM'GAIGA.SCCIGA.SCCIGA.SCC.WASTAGEIGA.SCC.WASTAGE1313Ie2823702,49I3327167492575'303(2)(3)l4)Ie)Ie)(7)I3I31------3--(I)TOTALSPERCENTAGES 4~211.7137384'I283.92908.8126201122013~86~I36~I4~I~3SEENOTE7 STEAMGENERATOR TUBEINSPECTION ANDCORRECTIVE ACTIONHISTORYCOMMENTS(1)PulledR15C55andR17C41fromthehotlegandR17C40fromthecold.legtodetermine IGAconditions inthe"B"steamgenerator. | |||
R17C41andECTindications atall'frequencies, R15C44hadjust100kHzAbsoluteECTindication andR17C40hadnoECTindication. | |||
Bothhotlegtubeshasapproximately 50%IGA,R17C41hada60%SCCindication associated withtheIGA.(2)Manuallysleevedfive(5)tubeswithnickelplated-Inconel600thermally treatedsleeves.ThreetubeshadIGAindications, twootherswerepreventatively sleeved.(3)Sleeved16tubeswithco-extruded sleeves,13withdefectswith3,preventatively. | |||
PulledR21C46witha100kHzECTindication, R7C45andR28C45whichwereclean.Alltubespulledwerefromthehotleg.(4)RecoveryfromtheJanuary25,1982TubeRuptureEventincludedremovingZ6tubesectionsbyEDMandIDCuttersalongwiththeonetubepulledfromthesecondary side.(5)Thefourtubesidentified withIGAinthe"A"steamgenerator weresleevedwith22"tubesheet sleeves.The78tubesidentified inthe"B"steamgenerator withIGAand/orSCCinthecrevicewererepairedasfollows:41tubesweresleevedwith36"brazedsleeves'tubesweresleevedwith28"brazedsleevesZ4tubesweresleevedwith22"tubesheet sleeves1tubeand2sleeveswereplugged1tubeR34C54waspulledformetallurgical analysis. | |||
TABLEV(CON'T) | |||
STEAMGENERATOR TUBEINSPECTION ANDCORRECTIVE ACTIONHISTORYCOMMENTS(6)Thetwotubesidentified withIGAinthecreviceinthe"A"steamgenerator IinletweresleevedwithZO"tubesheet sleeves.Oneindication | |||
)409oTWD,intheU-bendwaspermanently plugged.The70tubesidentified inthe"B"steamgenerator wererepairedasfollows:56tubesweresleevedwith20"tubesheet sleeves10tubesweresleevedwith36"brazedsleeves3tubesweremechanically plugged(CEremoveable) 1tubewasexplosively plugged1tubewassleevedwitha36"brazedsleeveduetothedominoeffect.(7)'hefivetubesidentified withcreviceindications inthe"A"steamgenerator inletweresleevedwithZ7"Combustion Engineering Sleeves(CE).Onetubeidentified withgeneralO.D.indication abovethesecondary sidetubesheet wasalsosleevedwithaCE27"sleeve.The57tubesidentified inthe"B"steamgenerator wererepairedasfollows:27tubesweresleevedwithCEZ7"SleevesZ7tubesweremechanically plugged(CEremovable) 3CEMechanical Plugsinstalled in1985wereremoved'andsleevedwith27"sleevesThepresentsleeveinstallation statusis83brazedsleeves,88tubesheetsleeves,30weldedCEsleevesinthe"B"steamgenerator with6tubesheet sleevesand6weldedCEsleevesinthe"A"steamgenerator. | |||
TABLEV(CON'T)}} | |||
Revision as of 14:38, 29 June 2018
| ML17251A617 | |
| Person / Time | |
|---|---|
| Site: | Ginna  |
| Issue date: | 03/01/1986 |
| From: | CURTIS A E, HENRY G L, SNELL T F ROCHESTER GAS & ELECTRIC CORP. |
| To: | |
| Shared Package | |
| ML17251A616 | List: |
| References | |
| NUDOCS 8603270184 | |
| Download: ML17251A617 (40) | |
Text
{{#Wiki_filter:RO,CHESTER GASRELECTRICCORPORATION RESEARCHANDSCIENCESDEPARTMENT MATERIALS ENGINEERING DIVISION1986STEAMGHNHRATOR EDDYCURRENTEXAMINATION'SUMMARY REPORTFORR.E.GINNANUCLEARPO)VHRPLANTMARCII1,1986PREPAREDBY:G.L.Henry,NDHTechnician, Materials Engineering LevelIIHTPRHPARHDBY:T.F.SellND~Tecnician,Materials Engineering LevelIIETAPPROVEDBY:A.H.CurtisIII,Manager,Materials Engineering LevelIIIExaminerpgpADOCH,05000g24~4 8
TABLEOE'CONTENTS
1.0INTRODUCTION
2.0,DATAACQUISITION PROGRAM3.0DATAANALYSISRESULTSSUMMARY4.0OBSERVATIONS
5.0 CORRHCTIVH
ACTION INTRODUCTION Thefollowing reportisasummaryoftheresultsofthemultifrequency eddycurrentexamination performed duringtheFebruary1986AnnualRefueling andMaintenance OutageattheR.E.GinnaNuclearPowerStation.Theexamination wasperformed onboththe"A"and"B"recirculating steamgenerators whichareWestinghouse Series-44 design,containing 3260Inconeltubeshavinganominal0.875"O.D.by0.050"wallthickness. Theexamination wasperformed byRochester Gas8eElectric(RGRE)personnel thathavebeentrainedandqualified intheeddycurrentmethodtoatleastaLevelIcertification. Otherpersonnel supportduringdataacquisition wasprovidedbyWestinghouse ElectricCorporation andtheBabcock8zWilcoxCompany(BhW).Theinitialdataanalysisreviewwasperformed byateamofZETECpersonnel. Anindependent dataanalysisreviewwasperformed byRGhEandB&Wpersonnel subsequent totheZetecanalysis. Thedataanalysiswasperformed, bybothteams,utilizing theZetecDDA-4DigitalDataAnalysisSystem.Inaddition, Westinghouse ElectricCorporation's Intelligent EddyCurrentDataAnalysisSystem(IEDA)wasutilizedasathirdreviewofthedataaspartofanRG8cEResearchandDevelopment Project.Finalresolutions ofalldataanalysisperformed byRGfkELevelIIandIIIpersonnel. Thepurposeoftheeddycurrentexamination wastoassessanycorrosion ormechanical damagethatmayhaveoccurredduringtheoperation cyclesinceApril1985.Particular attention wasgiventodetecting intergranular attack(IGA)andstresscorrosion cracking(SCC)inthetubesheet creviceregion;pittingandwastagebetweenthetubesheet andfirsttubesupportplate;dentingandwearfrettingattheantivibration bartotubeintersections intheU-bendregion.
DATAACQUISITION PROGRAM11Theeddycurrentexamination ofthe"A"5"B"steamgenerators wasperformed utilizing theZetecMIZ-18DigitalDataAcquisition System.Thefrequencies selectedwere400,200,100and15kHz,allofwhichwereruninthedifferential andabsolutemodes.Theexamination wasperformed primarily withastandard0.740"-0.720"O.D.bobbincoilwithsmallerdiameterprobesusedtotraversethesmallerradiusU-bends.Priortotheexamination ofthesteamgenerators, aprograniwasestablished foreachleg(inletandoutlet)ofboththe'A"and"B"stean>generator. Thephilosophy ingenerating thisprogramistoprovide100%%uoexamination ofeachsteamgenerator uptothefirsttubesupportplatealongwithonefifthofthetubesbeingselectedforafulllengthinspection. Thiswillprovide100%inspection ofalltubeseveryfiveyears.TableIisabreakdown, bysteamgenerator, ofalltubesexaminedandtotheextenttested. STEAMGENERATOR "A"1986EDDYCURRENTEXAMINATION PROGRAMPRIORTOCORRECTIVE ACTIONEXTENTTESTEDNUMBEROFTUBESPERCENTAGE FULLLENGTH61218.8%PARTLENGTHFROMINLETglTSPH¹2TSPHg3TSPHg4TSPHg5TSPH¹6TSPHSLEEVEDTUBESTUBESPERMANENTLY PLUGGED2240248246012668.7%7.6%0.7%0.2%0,0%0.1%100.0%3.9%PARTLENGTHFROMOUTLET¹1TSPCg2TSPC¹3TSPCg4TSPCg5TSPCg6TSPC0.0%0.0%0,0%0'%0.0%0.3%U-BEND0.0%g6TSPHg5TSPH¹4TSPH¹3TSPH¹2TSPH¹1TSPHHTS200.00000.1%0'%0.0%0.0%0.0%0.0%0'%TABLE1
STEANGENERATOR "B"1986EDDYCURRENTEXAHINATION PROGRAttPRIORTOCORRECTIVE ACTIONEXTENTTESTEDFULLLENGTtttfUHBEROFTUBES703PERCENTAGE 21.6%PARTLENGTHFROttINLET81TSPHg2TSPHg3TSPHg4TSPHg5TSPHg6TSPH2293141015970.3%0.4%<0.1%0.0%<0.1%1.8%SLEEVEDTUBESTUBESPERNANENTLY PLUGGED171177100.0%5,4%PARTLENGTHFROMOUTLETglTSPCg2TSPCg3TSPCg4TSPCg5TSPCg6TSPC00000630.0%0,0%0.0%0.0%0.0%1,9%U-BEt)D00.0%g6TSPHg5TSPHg4TSPHP3TSPHf2TSPHPlTSPHHTSSLEEVEEND1590,1%0,0%0.0%0.0%0.0%0'%0.0%93.0%TABLE1CON'T DATAANALYSISRESULTSSUMMARYTheinitialandindependent reviewdataanalysiswasperformed usingtheZetecDDA-4DigitalDataAnalysisSystem.Edition18.1ofth'e~dataanalysissoftwarewasusedtoanalyzedatafromtheMIZ-18digitaldataacquisition system.Thissystemprovideson-linedatadigitization andstorageontoamagneticdatacartridge. Alldigitaldata(upto8channels) issentdirectlytotheHP-9836computerfromthedatacartridge recorder. Thetubenumberidentification isencodedonthedatacartridge. Amessageblockisavailable shouldanycommentsbedesiredduringda'taacquisition. IAlldatacartridges werereviewedbydisplaying the400kHzdataontheCRTalongwiththeverticalcomponent ofthedifferential andabsolutemixoutputsinstripchartform.Otherfrequencies andtheircomponents wereselectedasneededforfinalresolution. Allrecordable indications wereloggedintothecomputerandstoredonfloppydisk..Thefinalreportformsummarizing allcreviceand>20%%uoTWDindications foreachsteamgenerator (inletandoutlet)canbefoundinthissection.Anexplanation oftheabbreviations andnomenclature usedontheselistshasbeencompiledforeaseofinterpretation. TableIIhasbeencompiledtoshowalistofthetotalnumberofdentsateachaxialelevation andabreakdown ofdefectsbypercentTWD.Thedentindications onthistableareonlythosewithsignalamplitude of5voltsandgreater,whichwouldapproximate abouta0.025"dentonthediameterofthetube. SG"A"DEttT&DEFECTLOGFEBRUARY1906INSPECTION INLETOUTLETDEttTS:DENTS:HTS"MIDHTSHTS"1H1H1H-2H2H2H"3H3H3H-4H4H4H-5H5H5H-6H6H>6HAVB1>AVB1AVB2>AVB292426230170001010211710000CTS-tlIDCTSCTS"1C1C1C-2C2C2C-3C3C3C-4C4C4C-5C5C5C-6C6C>6CAVB4">AVB4AVB3>AVB30336051103011700000TOTALDENTS"639TOTALDEtlTS"31DEFECTS:DEFECTS:0-19%20-29%30-39%40-49%5059%60-69%70-79%00-09'%0-100% 416145161001000"19%20-29%30"39%40-49%50-59%60-69%70-79%80-09%90-100%124121000000TOTALDEFECTS-579TOTALDEFECTS"137TABLE2 SG"B"DEttT&DEFECTLOGFEBRUARY1906IWSPECTZOW INLETOUTLETDENTS:DENTS:HTS-tlIDHTSftTS-1H1H1H-2H2H2tt-3H3H3H-4H4H4H-5H5H5H-6)t6H>6HAVBl>AVB1AVB2>AVB263037211000000103600000CTS-ttIDCTSCTS-1C1C1C-2C2C2C-3C3C3C-4C4C4C-5C'C5C-6C6C>6CAVB4>AVB4AVB3>AVB3061040001~0101010621000TOTALDENTS"375TOTALDEttTS-149DEFECTS:DEFECTS:0-19%20-29%30"39%40-49%50-59%60-69%70-79%00-09%90-100%SR265327251312940-19%20-29%30-39%40-49%5059%60-69%70-79%00-89%90-100%751'000000TOTAIDEFECTS"353TOTALDEFECTS"70T~ABLE2~COtl'T LISTOF>20%INDICATION ANDCREVICEINDICATION NOMENCLATURE ToofListInformation SG-SteamGenerator andLeg(ie:1=A,2=Band1=Inlet,2=Outlet)ROW-ROWnumberfromthetubeidentification. COL-Columnnumberfromthetubeidentification. VOLTS-P-Pamplitude ofthemeasuredindication signalresponse. %-PercentthroughwallfromO.D.basedonmeasuredsignal.CH@-Channelfromwhichindication wasdetermined. LOCATION-Locationofindication relativetotubesheet orsupportplate.INDEX-Locationoftubedataondatadisk.Information Under%11<20-Measurable indication lessthan20%throughwall(IGA-SCC). >40-Absoluteindication measuredfromabsolutemixwheredepthdetermination couldnotbeaccurately performed (IGAonly).SQR-Multipleindications interferring withadepthdetermination (IGA-SCC). I~DS-Distorted rolltransition indication thatcannotbeconfirmed ormeasured. XX-Themeasurepercentthroughwallofthedeepestpenetration (SCC)withinanIGApatchorarea.TWD-ThroughWallDimension Information UnderCHP1-Indication determined andmeasuredwith400kHzdifferential forfinalinterpretation. M2-Indication determined withabsolutemix,depthcannotbeaccurately determined, butbaseduponamplitude isfelttobeabove40%IGA. I1LISTOF>Z0%INDICATION ANDCREVICEINDICATION NOMENCLATURE (COB'7)"Information UnderLOCATIONHTS-Secondary faceofinlettubesheet. TSP-TubeSupportPlateCTS-Secondary faceofoutlettubesheet. -XX.X-Depthbelowthesecondary faceofthetubesheet orsupportplateswheretheindication islocated.+XX.X-Heightabovethesecondary faceofthetubesheet orsupportplateswheretheindication islocated. RG&EEDDYCDRRE))IIt)SFKYIO)I REFORT'ridayfebruary26,)986)2:59FIIPNEIPI.AtlT:RG&E-GIHHAOUTAGE:RG&E1906SGAREPORT:TUBESWITHIt)DICATIOHS 20'4ORGREATERSTEAHGENERATOR It)SPECTED FROHABOTH)IL&Cl.ABWCHTCKSDHGDTSFRTIGAt)GVNDDOBSPRHRPGSLGTPGUBCWTH1&2Anti-Vibration BarWearChatterCrackedSupportPlateDingDistorted TubeSheetFrettingIntergranular AttackHachining GrooveNoDetectable DefectsObstructed Permeability RemovedPlugSludgeTemplatePlugU"BendCrackMallThinningB&WSleeveTapesBLGCPRDHT"DRTDSPIHCSCCt)AGHSYFPGPITSLVSQRTBRUDSWASBulgeCopperDentDistorted RollTransition PlateDistorted TubeSupportIncomplete TestStressCorrosion Cracktlagnetite NoisyTubePermanent PlugPittingSleevedSquirrelToBeRerunUndefined SignalWastageROWCOLVOLTSDEGIHDCHELEVIHCHESCOIIHEHTS EXTENTPSID77888910111314151G1710111214151819121213142121101112131213141717921212317171022222425201.54150202.14162201.52161201.43162212.47158212.81150211.01159214.15151212.66158212.16159213.98149212.91153211.93149222.15162222.77157222.08157223.59159223.30157223.2815522152158234.70158232.70158238.83150234.43156232.56156231~8315G241.84162242.16159244.10161245.23156253.72157253.88146257.55153256.86150252.82161263.04153263.80152262.77159261.27152273.57154273'5314927547)45275.42)51275.63)53272.10156271.68155281,.58160285.)8)532320202023292229232230273020242422242523232329252525202220252332262920262721272530332026242521261HTS1HTS1HTS1HTS1HTS1HTS1HTS1HTS1HTS1HTS1HTS1HTS1HTS1HTS1HTS1HTS1fKS1HTS1HTS1HTS1HTS1HTS1HTS1HTS1HTS1HTS1HTS1HTS1HTS1HTS1HTS1HTSIHTS1HTS1HTS1HTSIHTS1HTSIHTS1HTS1HTS1HTS1HTS1fITS1HTS1HTS1HTSIHTS2.51.92,21.81.92'2.02.02.51.71.61.11.23.12.51.02.02.01.20.92.82.13.23.01.50.91.92.82;82.72~42.32'2.32.90.91.92'1.82.92.32.71.92.71.61.22.11.7¹ITSPH¹1TSPfl¹ITSPH¹ITSPH¹ITSPll¹1TSPH¹1TSPH¹1TSPH¹1TSPH¹ITSPH¹ITSPH¹1TSPH¹1TSPH¹1TSPH¹ITSPH¹1TSPH¹1TSPH¹ITSPH¹ITSPIl¹1TSPH¹ITSP'H¹1TSPH¹ITSPH¹1TSPH¹ITSPH¹ITSPH¹GTSPH¹GTSPH¹6TSPH¹6TSPH¹6TSPH¹6TSP.H¹6TSPH¹6TSPH¹6TSPH¹6TSPH¹6TSPH¹6TSPH¹GTSPH¹6TSPH¹6TSPH¹6TSPH¹6TSP)I¹6TSFH¹6TSPEl¹6TSPH¹6TSPfl¹6TSPH274027402740274027402740274027402'740274027402740274027402740274027402740274027402740274027402740274027402740274027402'14037403740374037403'14037403740374037403'740374037403'1'4037403'140374037403740Hl)ILI)L))IHLHLHLHLHLflLIILflLifLHLHLHl.HlHL)ILHl(HLflLHLHLHLHLHLHLHljHLHLHLHLHL)ILHLHLHLHL)ILHLIILHLHLHLHLHLHL RGKEEDDYCURRENTINSPECTION REPORTFridayFebruary28,198612:59PNPhGE2PLANTOUTAGERAPPORTRG&E"GINNARG&E1986SGATUBESWITHINDICATIONS 204ORGREATERSTEAIIGENERATOR INSPECTED FROI{BOTHHL&CLROHCOLVOLTSDEGINDCHELEVINCHESCO{{I{ENTS EXTENTREELPSID152423242516232324252626202223242628212223251921232526192121222223252639392021262728212122242526272425272020212526262829202129262029293030303131313131313132323232323233333333343434343435353535353535353535363636363637373737373737383836393939393939434445454546474.023.114.733.836.841.524.546.004.495.002.542.373.358.036.026.203.861.483.137.166.203.982.194.473.665'475.223.684.682.154.042.794.924.674.27.262.522.184.213.905.013.253.335.813.674.815.754.804.144.305.963.553.363.894'94.176.706.705.305.495.087.344.624.394'3150153153149155161147145147153161157146149148154153158156152150157143151153155154151155157153157153155157.1227815415415014514815715215815715115614914715114915515815715215615615915881081571129262630252031333126202132303025262020242620322523212225212023202321203321M222226302821252020262127292627242022252121212220252023261HTS1HTS1HTS1HTSIHTS1HTS1HTS1HTS1HTS1HTS1HTS1CTS1HTS1HTS1HTS1HTS1HTS1CTS1HTS1HTS1HTS1HTS1HTS1HTS1HTS1HTS1HTS1HTS1HTS1HTS1HTS1HTS1HTS1HTSIHTS1g4AVB2g3AVB1HTS1HTS1HTS1HTS1HTS1CTS1HTS1HTS1HTS1HTS1HTS1HTS1HTS1HTS1HTS1CTS1CTS1CTS1HTS1HTS1HTS1HTS1HTS1CTS1CTS1CTS1glTSPH+1CTS3.01.31.'81.41.33.72.51.81.61.31.11~72.81.82.51.60.91.12.02.42.21.72.12.22.61.71.22.22.20.91.62.12.61.51.20.00.01.82.31.51.51.02.21.81.62.11.32.11.72.22.31.9F62.21.81.92.02.01.91.315.615.61.91.416.3HASCPRWASCPRWASCPRWASCPRAHASCPRHASWASHASHASHASHASCPRHASWASHASHASWASWASCPRHAS<<P61%ABHABHCPRHASWASWASWASWASWASWASWASHASWASWASCPRHASHAS>>HASWASIDIDIDg6TSPHg6TSPg6TSPH¹6TSPflg6TSPH¹6TSPH¹6TSPH¹6TSPH¹6TSPHg6TSPH¹6TSPHg6TSPHg6.TSPH¹6TSPH¹6TSPHg6TSPHg6TSPf{g6TSPflg6TSPH¹6TSPHg6TSPH¹6TSPH¹6TSPHg6TSPH¹6TSPH¹6TSPHg6TSPHg6TSPHg6TSPH¹6TSPH¹6TSPHg6TSPHg6TSPHg6TSPH¹6TSPHg6TSPHg6TSPHg6TSPH¹6TSPH¹6TSPH¹6TSPHg6TSPHg6TSPH¹6TSPH¹6TSPH¹6TSPC¹6TSPH¹6TSPHg6TSPH¹6TSPI{¹6TSPH¹6TSPfl¹6TSPf{¹6TSPC¹6TSPHg6TSPHg6TSPI{¹6TSPHglTSPHglTSPfl¹6TSPC¹6TSPC<<6TSPCglTSPH¹6TSPH4740HL4740IIL4740'L4740HL4740HL4740HL.4740HI4740HL4740HL4740HL4740HL14720CL4740HL4740HL4740HL4740HL4740HL14720CL5740HL5740HL5740HL5740HL5740HL5740HL5740HL5740HL5740HL5740HL5740HL5740HL5740HL57.40HL5740HL5740HL5740IIL'5720CL15720CL5740HL5740HL5740HL5740HL6740HL15720CL6740HL6740HL6740HL6740HL6740HL6740HL6740HL6740HL6740HL16720CL18720CL16720CL6740HL6740HL6740HL7720HL7720HL18720CL18720CL,18720,CL'720HL22720CL I RGKEEDDYCURRE))TI)ISPECYIO)j REPORTEridayEebruary28,)98612:59P)fPAGE3PLANTOUTAGEREPORTRG&E-GINNARG&E1986SGATUBESWITHINDICATIONS 204ORGREATERSTEAHGENERATOR INSPECTED FROHABOTHHL&CLROWCOLVOLTSDEGINDCHELEVINCHESCOMMENTSEXTENTREELPSID10.781.005.837.314.412.651.803.135.714.802.710.432.752.261.261.151.652.531.723,193.200.474.742.660.820.820.622.111.530.831.734.191.417.074.354.863.023.483.014.373.153.035.034.406.204.675.293.102.884.582'32.752.924.433.485.443.825.642.281.581.572116262830312026282816232728292916172728131516161717192917171816162215151619211516201917191891913169614679912812'll47484848484849494949505050505050515151515252525353535353545454555557596161616162626263646466676768686970707171727373747691ENDOFDATA10162162158157'62158160153155)5715516116216015615315915316114515815815715813815216015815615215815914915415515614815515515415315115515315214915615415514815415415415015815815315216115525202023242023212725242520202124272227203323232423382821232428232226212020272020212224202223262021202721212125232328292020CTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSfiTSHTSHTSHTSHTSHTSI)TSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTS15.6IDTSP2'1.41.00.90.81.61.60.51.45'10.70.41~60.71.14.50.61.91.31.74.1+5.04.84.83.81.90.93.00.72'4.03'1.72'2.11.41.61.81.91~61.71.41.61.31.80.91.51.62'1.40.92'1.01~21.41.61~11.0WAS¹1TSPHCPRWAS¹1TSPHWAS¹1TSPHWAS¹1TSPHWAS¹1TSPH¹1TSPH¹1TSPH¹3TSPH¹3TSPH¹2TSPH¹ITSPH¹1TSPH¹ITSPH¹1TSPH¹1TSPH¹1TSPH¹1TSPH¹1TSPH¹1TSPH¹1TSPH¹1TSPHTSP¹1TSPH¹1TSPH¹ITSPH¹1TSPH¹1TSPH¹1TSPH¹1'SPfl¹1TSPH¹1TSPfj¹ITSPHWAS¹ITSPH¹1TSPfj¹ITSPfj¹1TSPH¹1TSPfl¹1TSPfl¹1TSPH¹1TSPH¹1TSPH¹1TSPH¹1TSPH¹1TSPfj¹1TSPH¹1CHT¹1¹I¹I¹ITSPTSPTSPTSPTSP¹1¹1¹1¹1¹1¹2¹1¹3TSPHTSPHTSPHTSPHTSPHTSPHTSPHTSPH00.5WAS¹1TSPH1.0¹1TSPH18720CL8720HL8720HI8720HL8720HL8720HL8720HL8720HL8720HL8720HL8720IIL8720f)L0720HL8720HL8720HL8720HL8720HL8720HL8720HL8720HL8720HL8720HL8720HL8720HL8720HL8720HL8720HL8720HL8720HL8720HL8720HL8720HL8720HI9720HL9720I)L9720HL9720HL9720HL9720HL9720HL9720HL9720HL9720HL10720Hl10720HL10720HL10720HL10720HL10720HL)0720HL10720HL10720HL10720HL10720HL10720HIll720HL11720HL11720HL11720HL11720HL12720HL RGREEDDYCURRENTINSPECTION REPORT'"FridayFebruary28,198612:58PNPAGE1PLANT:RG6E-GINNAOUTAGE:RGRE1986,SGAREPORT:TUBESREQUIRING CORRECTIVE ACTIONABW-Anti-Vibration BarWearCHT-ChatterCKS-CrackedSupportPlateDNG-DingDTS-Distorted TubeSheetFRT-FrettingIGA-Intergranular AttackMGV-Machining GrooveNDD-NoDetectable DefectsOBS-Obstructed PRM-Permeability RPG-RemovedPlugSLG-SludgeTPG-TemplatePlugUBC-U-BendCrackWTH-WallThinning162-BRWSleeveTapesSTEAMGENERATOR
- AINSPECTED FROM:HOTLEGBLG-BulgeCPR-CopperDNT-DentDRT-Distorted RollTransition DSP-Distorted TubeSupportPlateINC-Incomplete TestSCC-StressCorrosion CrackMAG-Magnetite NSY-NoisyTubePPG-Permanent PlugPIT-PittingSLV-SleevedSQR-SquirrelTBR-ToBeRerunUDS-Undefined Signal-WAS-WastageACTROWCOLVOLTSDEGINDCHELEVINCHESCOMMENTSEXTENTREEIPSIDSLV22201.56SLV21213.87SLV20224.33SLVll371.28SLV19505.54SLV7780.60ENDOFDATA71UDSM2HTS89721HTS55UDSM2HTS165131HTS128461HTS17381HTS17.218.914.916.51.817.9IGAglTSPHSCC81TSPHIGAglTSPHg6TSPHglTSPHSCCglTSPH2740HL2740HL2740HL6740llL8720HL11720HL
>>XSTEAMGENERATOR "4"TUBESRECEIVING CORRECTIVE ACTION-FEBRUARY2986PLANT:GXNNAGENERATOR: ATOTALTUBES:3260S>>CE87'ELDEDSLEEVEP>>CEHECHANICAL PLUG~~~~~~~~~~~~~0~~\~~~~~~~~~~~~~3~~~~~~~~~~~.o~~~IIIIIIIClOIllolOOIlIlOoIDCbIoIOIoIllII0ONg)HANWAYINLET(HotLei)-PIinaryFaceNOZZLECOLUHNS-3530A-35IIhIO-30IIV-jo RG&EEDDYCURREj{TIf{SPECTIO{{ REPORTfridayFebruary28,f98612:26PllPAGE1PLANT:RG&E-GINHAOUTAGE:RG&E1906SGBREPORT:TUBESWITHINDICATIONS 20%ORGREATERSTEAMGENERATOR
- BINSPECTED FROM.:BOTHHL&CLABWCf{TCKSDHGDTSFRTIGAMGVHDDOBSPRMRPGSLGTPGUBCWTH1&2-Anti-Vibration BarWear-Chatter-CrackedSupportPlate-Ding-Distorted TubeSheet-Fretting-Intergranular Attack-Machining Groove-NoDetectable DefectsObstructed
-Permeability -RemovedPlug-Sludge-TemplatePlug-U-BendCrack-WallThinning. -B&WSleeveTapesBLGCPRDNTDRTDSPIHCSCCMAGHSYPPGPITSLVSQRTBRUDSWAS-Bulge-Copper-Dent-Distorted RollTransition Plate-Distorted TubeSupportIncomplete TestStressCorrosion Crack-Magnetite -NoisyTube-Permanent PlugPitting-SleevedSquirrel-ToBeRerun-Undefined Signal-WastageROWCOLVOLTSDEGIHDCHELEVINCHES.COMMENTSEXTENTREELPSID1062.331419216.0615511224.0615320244.001539253.1815315253.1215317255.5114622250.6515624255.9214117265.0814719266.0214524266.1014922274.3515321283.8715523283.8115319297.9915524'05.7415542311.5714417330.8916024341.5614822301.3615341301.0114041381.4915824413.1814431430.6415327454.0715525502.5615323511.0315026511.6414025530.9615323561.1915430562.0615019622.5114922624.1316120622.9015820622.8715330622.2115020632.8814724644.5915526643.5414924652.93155EHDOFDATA35'202222262632233728"312622202220203021272133233222,2026213126272130202226222720~2520HTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSCTSTUBEHTSCTSTUBETUBEHTSHTSHTSHTSHTSHTSHTSTUBEHTSHTSHTSHTSHTSHTSHTSHTSHTSHTStt+ENDtEHDtEHDt++ENDt++++1.71.51.61.32'1.52'1.81.21.21.31.81.61.61.51.415'12.11.51.1546.71.316'1.63'6.90.94.1F62.21.51.51~6I50.92.52.51.82.2g2TSPC+0.0WASCPRCPRg6TSPCglTSPHglTSPHg6TSPflWASg6TSPHWASg6TSPHWASg6TSPHWASg6TSPH¹6TSPHWASg6TSPHWASg6TSPHWASg6TSPHWASg6TSPHWASg6TSPHWASg6TSPHWASg6TSPHWASg6TSPHCPR¹6TSPHHTSCPRg6TSPHWASg6TSPflflTSHTSCPR¹ITSPHHTSWASglTSPHWASglTSPflWASglTSPHWASglTSPHWASglTSPf{HTSWAS¹1TSPHWASglTSPHWASglTSPHWASglTSPHWASglTSPHWASglTSPHWASglTSPHWASglTSPHWASglTSPHWASglTSPH29720CL8740HL8740f{L8740HL9740HL9740HL9740HL9740HL9740HL4740HL4740HL4.740HL4740HL4740HL4740HL4740HL5740HL16720CL1&2610fll6740f{L15720CL1&2610HLI&2610f{L7740fll28610HL8740HL9740HL10740HL10740HL10740HL1&2610HL10740f{L10740HLll740HL11740HL10740HL11740f{Lll720HL11720f{Lll720HLll720HL
RG&EEDDYCURRENTINSPECTION REPORTFridayFebruary28,)98612;21PNPAGEIPLANT:RG&E-GINNAOUTAGE:RG&E1986SGBREPORT:TUBESREQUIRIHG CORRECTIVE ACTIOHSTEAHGENERATOR
- BIHSPECTED FROM:HOTLEGABW.CHTCKSDNGDTSFRTIGA~MGVNDDOBSPRMRPGSLGTPGUBCWTH1&2-Anti-Vibration BarWear-Chatter-CrackedSupportPlate-Ding-Distorted TubeSheet-Fretting-Intergranular Attack-Hachining Groove-NoDetectable Defects-Obstructed
-Permeability -RemovedPlug-Sludge-TemplatePlug-U-BendCrack-WallThinning-B&WSleeveTapesBLG-BulgeCPR-CopperDHT-DentDRT-Distorted RollT'ransition PlateDSP-Distorted TubeSupportINC-Incomplete TestSCC-StressCorrosion CrackHAG-Maqnetite HSY-HorsyTubePPG-Permanent PlugPIT-PittingSLV-SleevedSQR-SquirrelTBR-ToBeRerunUDS-Undefined SignalWAS-WastageACTROWCOLVOLTSDEGIHDCHELEVINCHESCOHHEHTSEXTENTREELIDPLGPLGPLGPLGPLGPLGSLVSLVPLGSLVSLVPLGSLV340.96102341.0067263.54701160.5245990.586018104.09.608110.0531713'.72978151.315729150.012316172.3605210190.6915730211.14609230.93929231.58006283H56M297184159M2UDS65H172M271H278M2'191801SQRH27MHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTS17.518.017.316.710.316.919.117.37.119.215.317.517.316.014.1SCCSCCSCCSCCPDRTSCCPDRTSCCSCCSCCglTSPHglTSP)I¹1TSPflglTSPHglTSPHglTSPHglTSPHglTSPf)¹ITSPflglTSPHglTSPHglTSPHglTSPHSCCglTSPHSCCglTSPH74074017401740174017402740274027402740274087408740740740HLHLHLf)LHL)ILHLIILHLHL,HI)ILHLHLHLPLGSLVPLGSLVSLVSLVSLVPLGSLVSLVPLGPLG32233.062223240.421352270.364322292,3416329330.409919341.029329341.267238360.95335370.50606370.916035374.034735381.3716064M2421UDSM249169I721831UDSIUDS105104M2SQR1HTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTS16,22'10.51.418.50.318.218.110.417.910.418.3IGAWASPNDDIGAP10%WASCPRSCCRPGSLVSCCCPRIGAIGASCCSCCCPRSCCglTSPHg6TSPH¹6TSPHg6TSPH¹6TSPHg4TSPCg6TSPH¹6TSPH¹6TSPHg6TSPHg6TSPHg6TSPH8944527667767740740740740740720740740740740740740))L)IL)IL))LHLHLHLf)LHLHLHLHLPLG363036380.7956UDS92HTSHTS17.019.2IGA¹6TSPHSCCg6TSPff740740)ILHLPLGSLVPLGSLVSLVPLGSLVSLVSLVSLVSLVSLVSLVSLVUDSUDSUDSMUDSM77565573M7791M76H09MSQRH9038382'50531390'247,42393.706319425.626321421.50861430.6311523460.5911327472.12569480.418611490.305221490.437526490.235531492.561532490.4060HTSHTSHTSfITSHTSHTS)ITSHTSHTSHTSHTSHTS)ITSHTS18.917.216.07.99.916.610.210.017.316.70.218.210.617.1DRTIGAIGAIGARPGSLVSCCCPRSCCSCCSCCSCCSCCSCCSCCSCCg6TSPHg6TSPHg6TSPHglTSPHg6TSPCglTSPHglTSPHglTSPHg)TSPfl¹ITSPH¹1TSPflglTSPHglTSPfl¹1TSPH777727789999999740740740740720740740740740740740740740740f)LHLHLHLIIIHLHLHLHLHLHLHLHLHL RGKEEDDYCURREEITIRSPECTIOR REPORT"'ridayEebruary28,198612:21PlfPAGE2r~IIIPLANT:RG&E"GINNAOUTAGE:RG&E1986SGBREPORT:TUBESREQUIRING CORRECTIVE ACTIONSTEAMGENERATOR BINSPECTED FROM:HOTLEGACTROWCOLVOLTSDEGIND'CHELEVINCHESCOMMENTSEXTENTREELPSIDSlaV7500.73SLV31520.96PLG1532.07SLV21551.32SLV24500.58PLG30503.23PLG38591.00PLG38600.95SLV8691.03SLV9700.70PLG30711.90PLG21761.04PLG22761.15SLV3701.76PLG2806.69PLG19800.61PLG20800.75ENDOFDATA5390700530SQR7403509151790875770100617275777958,9092707202388956914294MIHTS1HTSM1HTS1HTS1HTSM2HTS1HTS1HTSM1HTSM1HTS1HTSIHTS1HTS1HTSM2HTS1HTSM1HTS17.4SCCgfTSP16.3SCC81TSP17.5CHTSCCglTSP5.6RPGSLVg6TSP13.8SCCPfTSP16.9SCCElfTSP10.0SCCfffTSP17,4SCCSfTSP17.7SCC4'ITSP14.6SCCglTSP17.6CPRSCCPfTSP17.4SCCgfTSP17~3SCCgfTSP17.6SCCgfTSP17.9SCCgfTSP16.7SCCgfTSP16.0SCCgfTSPH9740H10740H11720C27720H10740H10740H10740H10740H11720Hll720H12720H12720El~12720H12720H12720H12720H12720HLHf.HlaHLEILHLHLHL'lHLHI.EllaIll.HLHLHLEEL STEAMGENERATOR "B"TUBESRECEIVING CORRECTIVE ACTION-FEBRUARY1986PLANT:GINNAGENERATOR: BTOTALTUBES:3260S~CE27'ELOEDSLEEVEP~CEKECNANICAL PLUG~~~~P~~~~~~~~~~~~P~P.P~.~PP~~~~~~~P~~~~0~~~~S~~~~~~~~~SS~~~'S'~~~~~~~0~~~~~~~~~~~SS~~~~~~~'~S~~~~~S~~~~~~~'ES~S~.~ST~S~~-~~.S~I~~~P~~0~~~~~~~~~~~~PE~~P~OIC3IZ20IIVIlCx~IC4JaCOP~~~~P0~P~..'~~~0~3~S~~~~~~~~~~~3~P~~~~~~~~-X5-so~~~P~~~P~PE~.~~~~~P'~P.~~~~~NOZZLEInCIIINLET(HotLeg)-PrimaryFaceIClCIIIRlCIII'ICCICOLUNNSIIICCIICCIIICICOIIOCIIHANKAY OBSERVATIONS Theresultsoftheexamination indicates thatintergranular attackandstresscorrosion crackingisstillactivewithinthetubesheet creviceregionsontheinletsideofeachsteamgenerator.- TheIGA/SCC,isprimarily locatedinthe"B"steamgenerator with52totalindications
- detected, only5indications weredetectedinthe"A"steamgenerator.
TableIIIshowsthesteamgenerator IGAhistory.GINNA'SSTEAMGENERATORS CREVICECORROSION INDICATION HISTORYB-SteamGenerator (A-SteamGenerator) March1979December1979NotSizeable0,A-S/G0-25%26"50%51-75%76-100%TOTAL(0)(0)B-S/G'OTAL April198019,1(0)31November1980April1981February1982October1982April1983March1984March19852711(3)5,233(1)1500(1)7(1)1615(0)(0)(0)(4)9(1)27(1)(2)141359513(2)9(Z)114(1)25(5)52Totals91(5)Z6(3)40(l)64(3)92(1)(13)313TABLEIII
Thecauseoftheinlettubesheet crevicecorrosion indication isintergranular attackandstresscorrosion crackingofthemil-annealed Inconel600.Thisformofcorrosion istheresultofthetubesheet creviceshavinganalkalineenvironment. Thiscreviceenvironment hasdeveloped overtheyearsasdepositsandactivespecieslikesodiumandphosphate, havereacted,changinganeutralorinhibited creviceintotheaggressive environment thatpresently exist.Alargevolume,typically <<20%TWD(ThroughWallDimension) wastagetypecondition existsjustabovethetubesheet secondary face.Asm'allpercentage ofthetubes,generally towardthecenterofthebundle,havethiscondition. Severalofthesetubesdidhavepenetrations >ZOYoTPDandZtubesinthe"B"steamgenerator and1tubeinthe"A"steamgenerator hadapotential >40%TWDasinterpreted fromthesignal.Therefore thesethreetubesweresleeved.Thesetubeswereaffectedbytheoriginalwaterchemistry conditions whenphosphate wasusedasabuffering mediumand'havenotseenfurtherdegradation since1975.Smallindications ofprobablecopperdepositswerealsofoundinthetubesheet creviceregionrandomlylocatedthroughout eachsteamgenerator. Basedonstudiesperformed withcopperplatedonInconeltubingandthephaserelationships ofthesesignalresponses atthedifferent inspection frequencies theindications canbeattributed tocopperdepositsandnotadefectcondition. Amoreextensive condition notedinthesteamgenerators, primarily ontheinletside,istheminordentingatthetubesheet secondary face..Dentingwasalsodetectedatthe1st,2ndand6thtubesupportplatesrandomlythroughout thegenerator andinmostcaseswasofgreatermagnitude insize.Notubeswerefoundwhichobstructed thepassageofa0.7ZO"O.D.probe.Ingeneral,minordistortions ofmostofthetubesupportplatesignalswereseen.Thedentingphenomenon andminordistortions atthetubesheet andsupportplatescanbeattributed to secondary sidecorrosion productbuild-upintheannularregionbetweenthetubeO.D.andthecarbonsteelsupportmember.Comparisons withpreviousdatadoesnotindicateanychangeintheextentormagnitude ofdentingfromwhathasbeendetectedbypreviousinspections. Severalindications weredetectedinthecoldlegsofthe"A"5"B"steamgenerators in'ndaroundtubeR23-C46.Areviewofpreviousyearsdatarevealedtheseindications tobepresent.TheyappearasashallowIDindication <20%whichwereconfirmed visuallytobeanexpansion ofdiameterwithinthetubesheet. Thiswascausedbyacam-loclc expansion devicewhichwasusedinearlieryearstosuspendleadblanketsfromthetubesheet primaryface.Insummary,the"A"SteamGenerator hadfive(5)tubesthatwerefoundtohavetubesheet creviceindications andone(I)tubehadanareaofpreviously detectedwastagethatexceededtherepairlimitintheinlet.The"B"SteamGenerator hadfifty-two (52)tubesheet creviceindications andtwo(Z)tubeshadareasofpreviously detectedwastagethatexceededtherepairlimitintheinlet.Onetubeinthe"A"SteamGenerator hadtwo(Z)indications atthethirdandfourthanti-vibration barintersections. Theseindications weregreaterthanZ0%butlessthantherepairlimit.Thistubewillbere-examined atthenextinspection todetermine ifthereisanactivefrettingweardamagemechanism goingon.Inlightofthefactthatonlythistubeisexhibiting theseindications, itisunlikelythatfrettingshouldbeofagreatconcern. CORRECTIVE ACTIONTableIVhasbeengenerated toidentifythetubeswithcreviceindications orwithindications whichexceedtherepaircriteria. Thistablealsoshowsthelocationandaxialextentoftheindication andwhatcorrective actionwastakenonthesetubes.Otherthancreviceindications, onlythreetubesexceededtherepaircriteria. One46%TWDindication wasfound1.8"abovethesecondary sidefaceofthehotlegtubesheet ofthe"A"steamgenerator tubeR19-C50.A42%TWDindication wasfoundZ.3"abovethesecondary sidefaceofthehotlegtubesheet, alongwitha49%TWDindication wasfound1.4"abovethesecondary sidefaceofthehotlegtubesheetofthe"B"steamgenerator, tubesR23-CZ4andR22-CZ9,respectively. ThreeCEmechanical plugswhichwereinstalled inB-S/Gin1985werepulledandinspected fulllengthwiththefollowing results:R19-C34revealeda72%TWD-8.3"fromthetopofthesecondary sidetubesheet face,R21-C42revealeda'7%TWD-9.9"fromthetopofthesecondary sidetubesheet face,R21-C55revealedan83%TWD-5.6"fromthetopofthesecondary sidetubesheet.Allsixoftheabove-mentioned tubesweresleeved"withCombustion Engineering 27"Sleevesandwillremaininservice.TableVhasbeengenerated tomaintainacompletehistoryoftotaltubesinspected totaldefectsdetected, andnumberoftubesrequiring repair.
TABLE41986CORRECTIVE ACTIOtlS"A"SGINLETROWCOLLOCATIONCORRECTIVE ACTION22212011197"B"SGINLET202122375078-UDS(IGA)72UDS(IGA)13468(SCC)HTS-17.2HTS-18.9HTS-14.9HTS-16.5HTS+1.8HTS-17.9CESLEEVECESLEEVECESLEEVECESLEEVECESLEEVECESLEEVEROWCOL1986%LOCATIONCORRECTIVE ACTION336283HTS"17.5HTS-18.0CEMECHPLUG21191867629161830669101113151517192156978459UDS(SCC)6572717819(SCC)88HTS-17.3HTS-16.7IITS-16.3HTS-16.9HTS-19.1HTS-17.3HTS-7.1HTS-19'HTS-15.3HTS-17.5HTS"17.3CEtlECHPLUGCEMECHPLUGCEMECHPLUGCEMECHPLUGCEMECHPLUGCESLEEVECESLEEVECEMECHPLUGCESLEEVECESLEEVECEMECHPLUG2323SQR27HTS-16.0HTS-14.1CESLEEVE322323246442HTS-16.2HTS+,2.3CEMECHPLUGCESLEEVEKEYHTSCEMECHPLUG,CESLEEVESQRUDSIGASCCDRTHOTLEGTUBESHEET SECONDARY FACECOMBUSTION ENGINEERING MECHANICAL PLUG(REMOVABLE) COMBUSTION E11GINEERING 27"WELDEDSLEEVEMULTIPLESTRESSCORROSION CRACKS(SQUIRRELS) -NOTQUANTIFIABLE UNDEFItlED SIGNAI.INTERGRANULAR ATTACKDEFECTSTRESSCORROSION CRACKDEFECTDISTORTED ROLLTRANSITION SIGNALASTERISKDENOTESTUBEPLACEDBACKINSERVICEBYREMOVALOFPREVIOUSLY ItlSTALLED CEMECHPLUGSANDTHEINSTALLATION OFACESLEEVE
TABLECON'T1986CORRECTIVE ACTIONSGINLETRONCOL1986%LOCATIONCORRECTIVE ACTIOtt222'9192938563535363627293334343637'737383838UDS49697283UDSUDS8584SQRUDS92(IGA)(IGA)(IGA)(IGA)HTSHTSHTSHTSHTSHTSEITSHTSHTSHTSHTSHTS18.51.418.58.318.218.118.417.918.418.317.019.2CEMECHPLUGCESLEEVECESLEEVECESLEEVECESLEEVECEMECHPLUGCESLEEVECESLEEVECEtkECHPLUGCEMECHPLUGCEMECHPLUG3831421921123279ll212631327311212438383889302122321920383939424243464748494949494950525355585859606970717676'8808080UDSUDSUDSUDS7756557377917689SQR909085SQR8391797581617579907082899194(DRT)(IGA)(IGA)(IGA)HTSHTSHTSHTSHTSHTSHTSHTSHTSIITSHTSHTSHTSHTSHTSEITSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTSHTS18.917.216.07.99.916.618.218.017.316.78.218.218.617.117.416.317,55.613.816.918.017.417.714.617.617.417.317.617.916.716,8CEMECHPLUGCESLEEVECEIIECHPLUGCESLEEVECESLEEVECEMECHPLUGCESLEEVECESLEEVECESLEEVECESLEEVECESLEEVECESLEEVECESLEEVECESLEEVECESLEEVECESLEEVECEMECHPIUG'ESLEEVECESLEEVECEMECHPLUGCEMECHPLUGCEtlECHPLUGCE,SLEEVE CESLEEVECEMECHPLUGCEMECHPLUGCEtlECHPLUGCESLEEVECEtlECHPLUGCEtlECHPLUGCEtlECHPLUG
STEAMGE7KRATOR TUSEINSPECTION AN)CORRECTIVE ACTIONHISTORYDATENO.TUBESINSPECTED PRIMARYTOSEC&5)ARY~LEIUCEEE. TOTALTUBESREQUIRING CORRECTIVE ACTIONNO.DFFECTSTYPEOFDETERIORATION REQUIRING REPAIR>40%NO.TUBESNO.TUBESNO.TUBESPLUGGEDSLEE~cPULLEDCOIEÃENT. HotColdHotColdABABA8ABA8INFACTORYAPRIL1972MARCH1974NOV.1974MARCH1975JAN.1976FEB.1976APRIL1975APRIL1977JULY1977JAN,1978APRIL1978FEB.1979319231921003247324710257520032681525258300204932520493251714171437537510503259515109851617014306723921744421931442530F005AS/00.091BS/00.099BS/00.0'12B8/0o.oeoBs/01913000112215I58.155WASTAGEWASTAGECRACKING/WASTAGE WASTAGEWASTAGECRACKINGWASTAGEIOCRACKINGCRACKING)/WASTAGE IDCRACKINGCRACKING/WASTAGE 2-IGAI00IQ020I00190200239201513II150239201513I58I15645ll'611OEC.1979APRIL1980NOV,1980MAY1981FEB.1982SEP.1982APRIL1983MARCH1984MARCH=1985FEB.198531383253138325313752531383823137633,3137717313531353134.523315131413,14031293096309330873083E375400525893832953308777031393253'I823750.007BS/0700BS/G133131515327810e75411-IGA.2-WASTAGE "A"PITTING/"B"IGAIGAIGA,WASTAGEIGA,MECH.OAM'GAIGA.SCCIGA.SCCIGA.SCC.WASTAGEIGA.SCC.WASTAGE1313Ie2823702,49I3327167492575'303(2)(3)l4)Ie)Ie)(7)I3I31------3--(I)TOTALSPERCENTAGES 4~211.7137384'I283.92908.8126201122013~86~I36~I4~I~3SEENOTE7 STEAMGENERATOR TUBEINSPECTION ANDCORRECTIVE ACTIONHISTORYCOMMENTS(1)PulledR15C55andR17C41fromthehotlegandR17C40fromthecold.legtodetermine IGAconditions inthe"B"steamgenerator. R17C41andECTindications atall'frequencies, R15C44hadjust100kHzAbsoluteECTindication andR17C40hadnoECTindication. Bothhotlegtubeshasapproximately 50%IGA,R17C41hada60%SCCindication associated withtheIGA.(2)Manuallysleevedfive(5)tubeswithnickelplated-Inconel600thermally treatedsleeves.ThreetubeshadIGAindications, twootherswerepreventatively sleeved.(3)Sleeved16tubeswithco-extruded sleeves,13withdefectswith3,preventatively. PulledR21C46witha100kHzECTindication, R7C45andR28C45whichwereclean.Alltubespulledwerefromthehotleg.(4)RecoveryfromtheJanuary25,1982TubeRuptureEventincludedremovingZ6tubesectionsbyEDMandIDCuttersalongwiththeonetubepulledfromthesecondary side.(5)Thefourtubesidentified withIGAinthe"A"steamgenerator weresleevedwith22"tubesheet sleeves.The78tubesidentified inthe"B"steamgenerator withIGAand/orSCCinthecrevicewererepairedasfollows:41tubesweresleevedwith36"brazedsleeves'tubesweresleevedwith28"brazedsleevesZ4tubesweresleevedwith22"tubesheet sleeves1tubeand2sleeveswereplugged1tubeR34C54waspulledformetallurgical analysis. TABLEV(CON'T) STEAMGENERATOR TUBEINSPECTION ANDCORRECTIVE ACTIONHISTORYCOMMENTS(6)Thetwotubesidentified withIGAinthecreviceinthe"A"steamgenerator IinletweresleevedwithZO"tubesheet sleeves.Oneindication )409oTWD,intheU-bendwaspermanently plugged.The70tubesidentified inthe"B"steamgenerator wererepairedasfollows:56tubesweresleevedwith20"tubesheet sleeves10tubesweresleevedwith36"brazedsleeves3tubesweremechanically plugged(CEremoveable) 1tubewasexplosively plugged1tubewassleevedwitha36"brazedsleeveduetothedominoeffect.(7)'hefivetubesidentified withcreviceindications inthe"A"steamgenerator inletweresleevedwithZ7"Combustion Engineering Sleeves(CE).Onetubeidentified withgeneralO.D.indication abovethesecondary sidetubesheet wasalsosleevedwithaCE27"sleeve.The57tubesidentified inthe"B"steamgenerator wererepairedasfollows:27tubesweresleevedwithCEZ7"SleevesZ7tubesweremechanically plugged(CEremovable) 3CEMechanical Plugsinstalled in1985wereremoved'andsleevedwith27"sleevesThepresentsleeveinstallation statusis83brazedsleeves,88tubesheetsleeves,30weldedCEsleevesinthe"B"steamgenerator with6tubesheet sleevesand6weldedCEsleevesinthe"A"steamgenerator. TABLEV(CON'T)}}