ML17309A416

ASME Section Xi Fracture Mechanics Evaluation of Inlet Nozzle Inservice Insp Indication.

ML17309A416
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Issue date:	03/15/1979
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ATELEDYNEENGINE="RINGSFRVICFS7mCi-j>j)C~A~RE~OP7TR-3454-1ASMESECT)ONX)FRACTUREhlECHANlCSEVALUAT)ONOFlNLETNOZZ~MINSERV)CP.NSPEC~.)ON.INDICAT)QNR.E.GINNAUNITNO.1REACTORVESSELMARCH151979

't ROCHESTERGASll(ELECTRICCORPORATIOi'l89EASTAVENUEROCHESTER,NY14649R.E.GIf'lilAUNITNO.1REACTORVESSELTECHNICALREPORTTR-3454-1ASHESECTIOf'lXIFRACTUREHECHANICSEVALUATIONOFINLETNOZZLEINSERVICE.Ii'lSPECTIOi'lIffDICATIOffi~1ARCH1",1979)iiTELEDYNEENGli4E=~lNGSERViCES303BEARHILLROAD'P/ALTHAiYi,MASSACHUSETTS02154

TABLEOFCONTENTSABSTRACT

2.0CONCLUSION

3.0DESCRIPTIONOFVESSELANDREPORTEDFLAW4.0COMPARISONOFGINNA-1REPORTEDFLAWWITHPREYIOUSLYEVALUATEDFLAWS5.0MATERIALPROPERTIES6.07.08.0PRESSURE-TEMPERATURELIMITSSTRESSANALYSiSFATIGUECRACKGROWTH9.0FRACTUREMECHANICSANALYSISANDCRITERIA10.0ELASTIC-PLASTi'CANALYSISAPPENDICESA.STRESSANALYSISB.EF"=CTOFFLAWSiZEANDTOUGHNESSVARIATiONSC.E"FFECTOFAPPLIEDSTRESSVARIATiONSD.ELASTiC-PLASTICEVALUATIONA4-3

ENG',NEWlRGSERVICESABSTRACTITheInserviceInspectionindicationofanearmid-wallflawinthereactorpressurevesselinletnozzleN2hasbeenevaluatedinaccordancewiththerequirementsofSectionXIoftheASHEBoilerandPressureVesselCode.ThereportedflawsatisfiestheCodecriteriaforacceptancebyeval-uation.Therefore,atleastwithrespecttothisindication,thevessel.isacceptableforserviceasiswithoutremovalorrepairoftheindication.

\1.0INTRODUCTIOHR.E.G>nnaUnitHo.1isaWestinghousePWRwhichwentintocommercialserviceinJune,1970.Thereactorpressurevessel,constructedbytheBabcock6Wilcox.Companywas.subjectedtoanInserviceInspectioninaccordancewithTechnicalSpecificationandSectionXIoftheASHEBoilerandPressureVesselCoderequirements.Whencertainalleviatingfactorsarenotconsidered,anultrasonicindicationinexcessofthesizepermittedforacceptancebyexaminationwasidentifiedintheweldwhichattachedaninletnozzletothevessel.InsupportofotherapproachesbeingfollowedbyRochesterGasandElectricpersonnel,.TeledyneEngineeringServices(TES)wasrequestedto,eval-uatethereportedindicationinaccordancewiththeSectionXIrequirementsforacceptancebyevaluation.Thisreportcontainstheresultsofthatin-.vestigations~A4-5

Z.OCONCLUSIONS2.1ThereportedflawsatisfiestheCodecriteriaforacceptancebyevaluation,soisacceptableforserviceasiswithoutremoval~~orrepairoftheindication.2.2Forthereportedflaw,ofdimensions:Through-walldepth=2a=0.93inchesLenth=I=5.3inchesEccentricity=e=1.0inches,thecalculatedstressintensityfactoris9.2ksi~in.TheCodeacceptablevalueis63.2ksi/in.Therefore,thetotalfactorofi21.7ascornaredtothecoderequiredfactorofsafetyof~10:3.16.2.3TheeffectofvariationsinflawsizeortoughnessofthematerialcanbedeterminedromFigure1.Basedupontheresultsplotte'hereon,aflawofthrough-walldimension2a=4.0inches,wouldsatisyCodeacceptancerequirementsevenifthetoughnesswe.oreducedzo67ksivin.Theef-"ofvariant.onsinapp1iedstressacrossthe7(awcan"edet.mined=romFigure2.Basedupontheresultsplot-.edtherein,tnerepor-dflaw,Za=0.93inches,wouldsatisfyCodeacceptancerequire:-;.-=.tseveni=theappliedstressacrosstheflawwereequa;totheyieldstrengthofthematerial,or51<si,whicheverislower.Statddifferently,thecalculatdpressuresLressactiingacrosstheflawcouldbeincreasedbyafactorinexcessof6wi-;nouiviolationoftheCodecriteria.

2.5Anelastic-plasticfracturemechanicsanalysis,followingthemethodsappliedbyDr.P.C.ParisasaconsultanttoNRCtoasimilarinvestigationindicatedthat:a.Thefactorofsafetyagainstplasticinstabilityfailureisinexcessof3foraflawthrough-walldimensioninexcessof2a=4inches.b.Foraflawthrough-walldimensioninexcessof2a=4inches,yieldingcanoccurandresidualstresses,suchasthosewhichresultfromweldin,'nddiscontinuitystresses,suchaqthosewhichresultfromterneraturedifferentialsorfrompipereactionstresses,wouldbeeliminatedfromconsideration.Althoughthisevaluationresultsintheconclusionthatsuchstressesmaybeignored,suchstresseswereconsideredintheevaluationswhichleadtothepreviouslylistedconclusions.2.6ThepreviousMCAP-8503ASHEIII,AppendixGanalysiswasreviewedtodetermineifthepressureofthereportedflawrequiresare-e!aluat:onoftheAppendixGrequirements.ItisaconclusionofthisreviewthattheMestingnouseevaluationofapostulatedflawinthevicinityofanoutletnozzlerepresentsamucnmoresigni-f;:cantsituationthandoesthereportedflaw.Tnerefore,accepz-abiiitofthepostulatedoutletnozzleflawlsfu1tnerconfirmac'.on,oftheacceptabilityofthereportedflaw.A4-7 II>>"

3.0DESCRIPTIONOFVESSELANDREPORTEDFLAWTheGinnaUnit1ReactorPressureYesse1(RPV)wasfabricatedbytheBabcock5WilcoxCompany(85W)totherequirementsofSectionIIIoftheASt<EBoilerandPressureVesselCodeinaccordancewithWestinghouseElectricCompany(W)Equip-mentSpecificationHo.676206Revision0withAddendum676554,Revision0.TheRPVStressReorts'reB8W1966,ReportsNumbers.1through12.rTheinsidediameter,totheinnersurfaceofthecladding,is132inches.Theminimumcladthicknessis5/32inches.Thewallthicknessis61/2inchesatthebeltlineand9inchesatthenozzlecourse.Thenozzlecoursecontainstwo521/2inchoutsidediameterinletnozzles,two49inchdiameteroutletnoz-'lesandtwonominal4inchdiametersafetyinjectionnozzles.Theinletandoutletnozzlesareata-commonel'evation.AsketchoftheinletnozzleisshowninFigure3,withthedimensionsoftheweldpreparationontheODofthenozzlesketchesabove.Thisconfigure-ionismportantbecauseitlocatesthereportedflaw.Figure4showstheinne.por-tionofthisweldprepa.ationwiththereportedflawlyingalongthelineAC.Thereweldprparationdimensionsaredefinedonaradialplanethroughthevesselcen-erline(==0'360').Sincetheweldoreparationismachinedcylindrcallywiththenozzlecenterline,theradialdis-ancebe-'.veentheinsideofthe.esse.and-heweldpreparationlandvarieswithradialposition~.Theflawisloca-;edbe-ween305'9<316.5",approximatelythe10:30o'lockpositionwnenlook':ngalongthenozzlecenterlinefromoutsideofthevessel.Figure4indicates:~eradialdistancefromtheRPVIDtoPointDasvaryingbetween4.2and..1inches.Thereportedflaw"through-wall"dimensionmeasuredalongtheweldprepa.ationis0.93inches.Forpurposesofanalysis,SectionXIpermitsthisflawtobre-olvedintoa"throuah-wall"dimensionmeasuredperpendiculartothevess'elsur-facewhichwoulddecreasethe2adimension,Becauseofthecomplexgeometry,advantageisnottakenofthisfactor.Theflawlength,measuredaroundthecir-cumVerenceoftheweldpreparationasthedistancebetween305'nd316.5's5.27 ENG)NEER)NGSERVtCESinches.SectionXIdefinestheflaweccentricityasthedistancebetween.theflawcenterandthevesselmidplane.ThedistancefromthevesselIDtotheflawcentervariesbetweenapproximately3.55and4.47inches.Conservativelyneglectingtheincreasedthicknessresultingfromtheouternozzlecornerradius,thereforetakingthetotalthicknessas9inches;theeccentricityvariesbetweenapproximately0and1".8asedupontheabovediscussion,andnotingthatanincreaseineccentricityincreasesthecalculatedstressintensityfactor,theflawisdefinedforpur-posesofanalysisbythedimensions:pa=0.93inches1=5.3inchese=1.0inch Ilay AENGINEERINGSERVICES4.0COMPARISONOFGINNA-1REPORTEDFLAWWITHPREVIOUSLYEVALUATEDFLAWSForpurposesofexaminingpressure-temperaturelimitations,WCAP-8503*consideredtheeffectsofaflawadjacenttotheoutletnozzle.Althoughthere~$Naredifferencesingeometrybetweentheinletandoutletnozzles,thestressesareverysimilar.ThisevaluationconsideredasurfaceflawinaplanepassingthroughtheRPVcenterlineofdepthequalto1.8inches{a/t=0.20)andsurfacelengthof1,8inches{aspectratioof1:6).Sinceasurfaceflawof'givenlengthanddepthresultsinapproximatelythesamestressintensityfactorasdoesasubsurface.flawofthesamelengthandtwicethethrough-walldimension,theWCAP-8503evaluationisequivalenttothaiwhichwouldbeobtainedforamid-wallflawof2a=3.6and1=10.8inthesameorientation...Infact,theWCAPevalu-'Iationwouldbeveryconservativebecausethesurfaceissubject,todiscontinuitystresseswhichhavebutlittleeffectnearmidplane.Ofevenmoreimportance,however,isthediffe.enceinorientationbetweenthetwoflaws.TheindicatedGinnaflawiscircumferentialtothenozzleandtheWCAPflawisradialtothenozzle;therefore,thepressurestressnormaltotheWCAPflawisaboutthretimesaslargeast.atnormaltotheGinnaindication.The.efore,theindic'tdGinnaflawisofconsiderablelesssignificancethanthenozzleflawusedfortheAppendixGevaluationofiheGinnavesselThemid-wall,nozzleattachmentweldflawmostsimilartothatindicesdinGinna-1whichhasbeensubjectedtoextensveinvestigationbyTESandbythe*HRCistheindicationinthePilgrim-1recirculationinletnozzleNZBwhichwasfirstdetec.edin1974andwnichwasreevaluatedin1976bybothTESandHRC.Thesignificantparametersmaybecomparedasfollows,usingthePilgrimvaluesevaluatedbyTES:ttWCAP-8'03,"ASMEIII,AppendixGAnalysisofRochesterGashElectricCorporationR.E.GinnaUnitHo.1ReactorVessel,July1975.

AFEi~jNEER)NGSERVICESPlant:Depth,2a,in.Length,1,in.Eccentricity,e,in..Hoopstressinvessel,ksi(atoperatingpressure)Yessejthickness6irma-I0.935.31.016.59.05.2~PI'Irim-11,55.20.5516.27.010.7TheNRCevaluationassumedsomewhatmoreconservativeparameters.SoththeTESandHRCevajuationsconcludedthawthePilgrim-1RPYwassatisfactoryiorcontinuedservice.Tnecalculatedstressntensiy=actorsforGInna-1woutdbeexpectedtobemuchsmallerthanthosecomputed=orPilgrim-l.Sasedupontheseiwocomparisonswithpreviouslyevaluatedflaws,onewouidjudgethaitheGinna-1vesselwouldeasilysatisfytheSectionXlcriria=oracceptancebyevaluation.A4-11 t'jIt,KIr 5.0HATERIALPROPERTIES4~~BaseduponthevaluespublishedinWCAP-8421*,-theunirradiatedmateria1propertiesofthenozzle,usingoutletnozzledata,andoftheweld,usingbeltlinewelddata,areasfollows:LocationRTNDTCyShelf,ft-1bNozzleWeld0.090.236001258018Thecomputedend-of-lifefluenceatthenozzleelevationis1.08(IO)atone-quarterthickness.UsingRegulatoryGuide'l.99,Revision1,theend-of-lifepropertiesarecomputedas:LocationNDT',fShelf,ft-lbNozzleWeld607011262!I,inWCAP-8503hasusedanuppershelfKl=200ksi~n.IRTheSect-ionXItoughnessversustemoeraturecurvesareplottedinFigure=foranend-of-lifeRTi'=70F.sUl"'iCAP-8421,AnalysisofCapsuleRFromtheRochesterGasandlectricCorporationR.:.GinnaUnitNo.1ReactorilesselRadiationSurveillanceProgram,November,1974.

I 6.0PRESSURE-TEMPERATURELIMITSTheupperlimitoftheTechnicalSpecificationheatupand.cooldowncurvesarealsoplottedonFigure5.Becausetheselimitsarecontrolledbythe.higherfluencebeltlineregion,full'operatingpressure,ZZSOpsig,isnotpermittedbelow315F.Thistemperatureisonthetoughnessuppershelfbyamargininexcessof100F.,

)>TELEDYNEENGINEERINGSERVICES7.0STRESSANALYSISThesignificantstressesactingacrosstheflawindicationarethoseduetovesselpressureandduetoweldingresidualstresses.Atthenearmid-walllocation,thermalstressesandstressesresultingfrompipereactioneffectsarenegligible.Thepressurestressesofinterestarethoseactinginaradialdirectionwithrespecttothenozzle.Inthemainshellcourseawayfromthenozzle,theoperatingpressureof2250psigcausesahoopstressequalto16.5ksiandanaxialstressequalto8.3ksi.Thepresenceofthenozzlereducestheradialstress,sineataradiusequaltothenozzleboreradiusthestressesmustbeequalto-2,3ksi,Iwhere'thenegativesignindicatescompression.Inthecourseofevaluatingsimilarflawsinothervessels,averysimplestresscalculationtechniquewasfoundtogiveexcellentanswersforthepressurmemoranestressacrosstheflaw.Specifically,thevaluesobtainedwiththsim-oleapproximationmaybecomparedtoothersolutionsasfollows:!!ethodSimp1eapproximat-:.on30finiteelement08C8.710.3membraneinnersurfacemid-walloutersurface20axisymmetricmodel,doubled7.7innerwall10.0mid-wailThi5slmpleapproximationisusedinthisevaluation.inordertoobtainthepressurestressactingnormaltotheF')aw,ascontainedinAooendix.A.

><TELEDYNEEiNGIREERNGSERVICESTheresidualstressesusedinthisevaluationareaconservativeapproximationtothosemeasuredinaheavyweldmentafterpost-weldheattreatment*.Thesedataindicatethattheresidualstrsssesvarythroughthethicknesswithacosinerelationshipfrom8.0ksitensileonthesurfacesto8.0ksicompressionatmid-wall.DespiteconiirmationofthepresenceofcompressiveresidualstressesatmidwallbyremovalofasimilarflawtotheoneunderconsiderationinaRP'J.Hocreditistakenforthesecompressivestressesinthisanalysis.Instead,theresidualstressesareconsideredtovaryasacosinefunctionthroughthethicknesswith8.0ksitensileonthesurfacesto0ksiatthecenter.PreviousevaluationofarecirculationinletnozzleinaBtlR,whichissub-jectedtolargertemperaturechangesthanisthesubjectPHRinletnozzle,indi-catesthatthermalstressesarenotsignificantaslongastheflawdoesnotapproachwithinabout11/2"fromtheinnersurface,Thisistrueduringnormalandabnormaloperationsbecausetheinletnozzleandtheadjacentvesselaresuojectedtothesametemperaturetransientandaresimilarinthickness.Tnere-fore,thermalstresseffectsarenotconsideredtobeofimportanceintherangeoiilawsizesconsidered,2a<4inches.Pipereactionstressesiniheweldregionareprimarilybendingstressesvaryingiromtensileaionesurfacetocompressiveattheother.Sincethere-sortedilawoiinte.estisnearmid-wall,pipereactionstressesacrossthetaware'.'nsignificant.Asaresultoithisdiscussion,theonlystressesusedinthefracturemechanicsanalysisofAopendix8arethosewhichresultfrominternalpressureandtheweldr'esidualstresses.Sincetheresultingstressintensityfactorisverylow,aquestionoftenarisesastotheconsequencesofanerrorinthecal-culatedstress.Forthisreason,anadditionalevaluation,AppendixC,ismadefortheindicatedflawdimensionsgivingthestressintensityfactorwhichwouldbe'computodforarbitraryvaluesoimembranestressactingacrosstheflaw.D..'.Ferr'.'(1P."".~uhlandD.R.l1iller,".'4easuremento7Residua1Stressesina"e'6e'lT.qsr';te'd.,'na~pumaIResea,cnUDDlemenr.,tlovemoeri"coA4-15

)<TELEDYNEZG;XEERIXGSERVICESWithrespecttoFaultedConditions,theinletnozzleprovidesthepathforinjectionflowforabout40minutesfollowingaLOCA.Forthefirst20secondstheflowisfromthesafetyinjectionaccumulatorsatatemperatureof90'F.Atthattimethesafetyinjectionpumpsarestartedanddeliver155Ffluidfromtheboricacidtanks.At140secondsfollowingLOCAinitiationtheflowtrans-ferstotherefuelingwaterstoragetankandthewatertemperaturedropsto'60F.Attheendof40minutesflowswitchestothecontainmentdumpandflowisataminimumof140F,ThereactorpressuredropstonearzeroimmediatelyfollowingaLOCA.TheotherFaultedConditionofconcernisaLargeSteamlineBreakAccidenl(LSBA).FollowingaLSBAthereactorcoolanttemperatureendpressurerapidlydecreases.Whenthepressuredescreasesbelow1450psig,flowfromtheboricacidstoragetanksentersthevesselat155F.SafetyinjectionterminatestenminutesaftertheLSBA.Flowduringtheseeventsisthroughtheinletnozzleanddownthevessel.Becausethenozzleandvesselareofaboutthesamethickness,butsmallthe.maldiscontinuitystressesresult.Analysisofsimilartransientinothernozzlesindicatesthermalstressesacrosstheweldoflessthan5ksi.Sincethepressurenasdecreased,thetotalstressintensityfactor,fortheFaultedConditionis,smallerthanthatcalculatedduringnormaloperation.Therefore,postulateesur-facflawsinthevesselbeltlineregionaremorelimitingthanisthereportednozzleweldflaw.A4-16 Cll~J' Ei~tNEERIRGSERY}CES8.0FATIGUECRACKGROWTHBecauseoftheoperatingcharacteristicsofaPWR,theinletnozzletemperaturevariationswithinthepowerrangearenegligible.Evenwhencoolanttemperature'changesdooccur,thenozzleandvesselrespondsimilarlyinthatthermaldiscontinuitystressesarenegligibl'einthevicinityofthereportedflaw.Skin-typethermalstressesmaybesignificantatandneartheinnersurfaces,butnotinthevicinityofthereportedflaw.Thereforetheonlycycleofimportancetogrowthofthereportedflawispressurizationanddepressurization.ForthereportedFlaw,theaKforpres-.surizationto2500'psig,thedesignpressure,isonly8.7ksi.An.Forasubsurfaceflaw,FigureA-4300-1predictsafatiguecrackgrowthrateof8(10)in/cycleforpressurizationto2500psig.Thereforenofatiguecrackgrowthispredicted.l EiMNEERjl4GSERVCES9.0FRACTUREMECHANICSANALYSISANDCRITERIAThelinearelasticfracturemechanicsmethodsofAppendixA,SectionXIoftheASMECodeareused.Thesemethodsareconservative,butarenotoverlyconservativeintheabsenceofsteepstressgradientsasisthecaseinthissolution.TheacceptancecriteriausedarethosebasedonappliedstressintensityfactorascontainedintheSummer1978AddendatoSectionXIoftheASMECode,IWB-3612.ThesecriteriaareidenticaltothoseusedinthePilgrim-1evalu-ation,althoughatthattimethecriteriawerereferencedtoaJunell,1974letterfromASMEtoBostonEdison.

10.0ELASTIC-PLASTICA!HALYSISAttachment4tothe!'(RCStaffEvaluationofthe1976Pilgrim-1ISIresults,datedApril21,1976,summarizesanelastic-plasticFractureMechanicsAnalysisperformedbyOr.P.C.ParisasaconsultanttoNRC.AppendixOtothisreportcontainsanelastic-plasticanalysisapplicabletotheGinna-1situationwhichfollowsParis'lternativesecondarystresscomputationmethod.Alsoconsideredisthemaximumilawsizewhichwouldresultinretentionofafactorofsafetyofburstofatleast,three.Thisanalysisi.ndicatesthataflawthrough-wall(2a)dimensioninexcssof4inchesisrequiredto'reducethefactorofsafetybelow3.0,usingananalysiswhichassumesaverylongflaw.Inaddition,thisanalysisshowsthatanyresidualorsecondarystresseswnicharepresentinthestructurewillbeeliminatedbyyieldingaslongastheflawdepth(2a),islessthananu;.-be.inexcessof4".Thatis,weldresidualstresses,thermalstressesandpipereactionstressesneednotbeconside.edinevaluatingthevesse!saic-yif2a<4inches.

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ATTACHMENT3SCOPEOFULTRASONICEXAMINATIONSOFTHEREACTORPRESSUREVESSELWELDS r~~VI~1 Thefollowingisalistingofmechanizedultrasonicezaminationsofthereactorpressurevesselweldsandadjacentpipingwelds.Theseexaminationswillinclude1/2Tbasematerialforvesselweldsand1/4inchbasematerialforpipingwelds.Alsoshownaretheanticipatedezaminationanglesandthedirectionofthebeamcomponent.Thelowerheadisforgedandhasnomeridionalweldsandtheshellcoursesareringsectionswithnolongitudinalwelds.Inallcasesthegoalistoexamine100%oftheweldplus1/2Teachsideoftheweld.Examinationof100%oftheweldlengthisthegoalalsoforthecircumferentialvesselweldseventhough74/S75SectionXIonlyrequires5%.Interferencefromothervesselcomponentsmaylimitthedesiredezaminationcoverage.Ifthiswasthecaseinpreviousezaminations,ithasbeennoted.AcompletediscussionoftheindividualezaminationareacoveragewiQbeprovidedinthefinalreportoftheezaminationsasrequiredbyRegulatoryGuide1.150Rev.l.MechUTexaminationswillbeperformedonthereactorvesselweldsandselectedreactorcoolantpipingweldsfromtheinsidesurfaceutilizingthePaRISI-2DeviceandSwHIFastPaRequipment.Ezaminationareasincludevesselcircumferential,nozzle-to-shell,andnozzlepipingwelds.TheMechUTezaminationsoftheRPVwillbeperformedinaccordancewiththerequirementsofthe74/S75SectionXIandReydatoryGuide1.150,Rev.1.Na)"RPVShellandHeadAVelds1)0-degreelongitudinalwave(UTOL)examinationswillbeperformedfordetectionoflaminarreQectorswhichmightaffectinterpretationofangle-beamresults.2)0-degreelongitudinalwave(UTOKV)ezaminationswillalsobeperformedfordetectionofreflectorsintheweldandbasematerial.3)45-degreeand60-de~eeshearwave(UT45andUT60)ezaminationswillbeperformedfordetectionofreflectorsintheweldandbasematerialorientedparalleltotheweld.4)45-degreeand60-degreetransverseshearwave(UT45TandUT60T)ezaminationswillbeperformedfordetectionofreflectorsintheweldandbasematerialorientedtransversetotheweld.5)InthecaseoftheRPVwelds,SwRI50/70tandemsearchunitsv%beusedtoezaminetoadepthofapproximately2.25inchesfordetectionofreQectorsintheclad-to-basemetalinterfaceareaandalsointhevolumebetweentheexaminationsurfaceandthedepthofthefirstCodecalibrationreQector.Thesedual-elementtandemsearchunitsdevelopaninteractivebeamwithlongitudinal'wavepropagationandproduceanezaminationwithsignificantlyimprovedsignal-to-noiseratiooverconventionalnear-surfacetechniques.

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b)RPVNozzleAreasTheinlet,outlet,andsafetyinjectionnozzle-to-vesselweldswillbeexaminedfromtheboreutilizing15-degree(forinletnozzles),10degree(foroutletnozzles)10-degree(forsafetyinjectionnozzle)and45-degreebeamsfordetectionofreQectorsintheweldandbasematerial.Inaddition,UT45TandUT60TezaminationswillbeperformedfromtheshellinsidesurfacefordetectionofreQectorsorientedtransversetotheweldandbasematerial.ThesetransverseexaminationsvrillutilizeacomputertocontroltheX-Y-ZmovementsofthePaR.devicetoassureaccuratepositioningaroundthenozzleduringezaminations.50/70tandemsearchunitswiHbeutilizedfromtheboreandshellinsidesurfacesfordetectionofreflectorslocatedintheclad-to-basemetalinterfaceregionandalsothevolumebetweentheexaminationsurfaceendtheQrstCodecalibrationreQectorforthepurposeofsatisfyingtherequirementsinSectionXI.c)PipingWeldsNozzlePiinWeldsFortheinletsafeend-to-nozzlewelds,aUTOLscanwillbeusedfordetectionofreQectorswhichmightaffectinterpretationoftheangle-beamresults.UT45andUT60scanswillbeusedfordetectionofreQectorsparalleltotheweldfrombothsidesoftheweld.AUT45Tscanwillbeusedfordetectionofreflectorsorientedtransversetotheweld.Theacousticpropertiesoftheinletelbowsprecludeezaminationfromtheelbowside;therefore,aUTOWscanwillbeperformedinadditiontothescansidentifledabove.Limitationsareexpectedaroundthevesselsupportlugs,safetyinjectionandinletnozzlesduetotheproximityofthesecomponents.Otherlimitationsarelisted.I.CircumferentialweldsEstimatedtime-(2.5shifts)Ringfory'ng-to-lowerheadweld(RPV-E)Ezaminationarea0-3600-360Angle0,45,60,50/700,45T,60T,50/70TBeamComponentup/dnmv/cdLowersheD-to-ringforgingweld(RPV-D)Ezaminationarea0-3600-360Angle0,45,60,50/700,45T,60T,50/70TBeamComponentup/dncw/ccwLimitationsduetoprozimityofcoresupportlugs@0from(344.20-15.90)CG-190from(74.20-105.80)CG-2180from(164.20-195.80)CG-3270from(255.25-284.75)CGAIntermediatesheD-to-lowershellweld(RPV-C)Ezaminationarea0-3600-360Angle0,45,60,50/700,45T,60T,50/70TBeamComponentup/dnmv/cd 1~h~t

~~D.UppersheH-to-intermediateshellweld(RPV-B)Examinationarea0-3600-360Angle0,45,60,50/700,45T,60T,50/70TBeamComponentup/dncw/ccwII.Uppershellregionarea(A)A.Flange-to-uppershellweld(RPV-A)fromshellEstimatedtime-(3.0Shifts)Examinationarea0-3600-360Angle0,45,60,50/700,45T,60T,50/70TBeamComponentupcw/cdB.Outletnozzle-to-shellwelds(N1A),(NlB)fromshellExaminationareanozzle(0-360)Angle0,45T,GOT,50/70TBeamComponentnv/cdC.Inletnozzle-to-shellwelds(N2A),(N2H)fromshellExaminationareanozzle(0-360)Angle0,45T,GOT,50/70TBeamComponentcw/cdD.Safetyinjectionnozzle-to-shellweld(AC-1002),(AC-1003)fromshellExaminationareanozzle(0-360)Angle0,45T,60T,50/70TBeamComponentav/cdIII.Uppershellrey'onarea(B)A.Flange-to-uppershellweld(RPV-A)fromsealsurfaceEstimatedTime-(1.5shifts)Examinationarea0-360B.Vesselsupportlugs'mminationareaVesselsupport(RPV-VSL-1)Vesselsupport(RPV-VSL-1)Vesselsupport(RPV-VSL-2)Vesselsupport(RPV-VSL-2)Angle18,11,4Angle0,45,60,50/700,45T,60T,50/70T0,45,60,50/700,45T,60T,50/70TBeamComponentdnBeamComponentup/dnnv/cdup/dncw/ca,vA1-3 I~wJ'I~~

IV.Nozzleinnerradius,integralmentionandnozzleboreEstimatedtime-(3.5shifts)~7~~rA.Outletnozzleinnerradiussectionintegralextensionregionandnozzlebore.B.ExaminationareaOutletA(N1A-IRS)OutletB(NlB-IRS)OutletA(N1A-IE)OutletB(N1B-IE)InletnozzleinsideradiusregionExaminationareaInletA(N2A-IRS)InletB(N2B-IRS)Angle10,45,50/7010,45,50/7050/7050/70Angle50/70-50/70BeamComponentToVesselC/Lcw/ccwToVesselC/Lcw/cmvToVesselC/LToVesselC/LBeamComponentcw/cmvcw/cdC.Nozzle-to-sheDweldsfromnozzleboreExaminationareaInletA(N2A)InletB(N2B)Angle15,45,50/7015,45,50/70BeamComponentToVesselC/Lnv/cdToVesselC/Lzv/ccwD.SafetyinjectioninsideradiusregionandnozzleboreEmminationareaSafetyinjectionA(ACr1003-IRS)SafetyinjectionB(AC-1002-IRS)Angle0,100,10BeamComponentToVesselC/LToVesselC/LSafetyinjectionnozzleintegralnxensionEzaminationareaAngleSafetyinjectionA{AC-1003-IE)70SafetyinjectionB{AC-1002-IE)70BeamComponentAvWvV.Nozzle-to-pipingweldsElbow-toinletnozzleweldsEstimatedTime-(3.5Shifts)EzaminationareaInletA(PL-FW-V)InletB(PL-PV-VII)InletA(PL-FKV-V)InletB(PL-FW-VII)InletA(PL-FW-V)InletB(PL-FW-VII)Angle0,45,600,45,6045RLT45RLT45RL45RLBeamComponentAwayfromVesselC/LAwayfromVesselC/Lnv/cdcw/cnvToVesselC/LToVesselC/L 4~I~t B.Nozzle-topipingweldsExaminationareaOutletA(PIPW-II)OutletA(PL-FW-Il)OutletB(PL-FiV-IV)OutletB(PIFW-IV)C.Safeend-to-nozzleweldsExaminationareaSafetyinjectionA(AC-1003-1)SafetyinjectionA(AC-1003-1)SafetyinjectionB(AC-1002-1)SafetyinjectionB(AC-1002-1)D.Piping-to-safeendweldsExaminationareaSafetyinjection'A(AC-1003-2)SafetyinjectionA(AC-1003-2)SafetyinjectionB(AC-1002-2)SafetyinjectionB(AC-1002-2)Angle0,45,60,45T,600,45,60,45T,600,45,60,45T,600,45>60,45T,60Angle0,45,45T,600,45,45T,600,45,45T,600,45,45T,60Angle0,45,45T,600745,45T,600,45,45T,600,45,45T,60BeamComponentAwayfromVesselC/LToVesselC/LAwayfromVesselC/LToVesselC/LBeamComponentAwayfromVesselC/LToVesselC/LAwayfromVesselC/LToVesselC/LBeamComponentAwayfromVesselC/LToVesselC/LAwayfromVesselC/LToVesselC/L

SCHEDULEOFMECHANIZEDEXAMINATIONSFORR.E.GIHHARPVaninationAreasCircunferential'LleldsRPV-E,D,C,-BDay1Day22[12Day3Day412I--I-Day5Day6Day7I12I--I-DaysOn~==Vessel(c="-CrewShiftUpperShellRegionAreaMelds(A)RPV-A,H1A,N18,H2A,HZB,AC-1002,&AC.1003UpperShellRegionAreaWelds(8)RPV-VSL1)RPV-VSL2(&RPV-AAC1002PipingMeldsElbowcoInletNozzleAPL-FM.V8PLFM;VIIOutletNozzletoPipeAPL-FN-II8PL-FM-IVSISafeEndtoNozzleAAC-1003-18AC-10021SIPipetoSafeEndAAC.1003.28AC-1002.2NozzleInsideRadiusSectionsandIntegralExtensionOutletA(H1A-IRS,-IE)Outlet8(N18-IRS,-IE)InletA(H2A-IRS)Inlet8(H28-IRS)SafetyinjectionAC.1003.IRS,-IEIRS,-IE----X

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