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="RING SFRVICFS7mCi-j>j)C~A~

RE~OP7TR-3454-1 ASMESECT)ONX)FRACTUREhlECHANlCSEVALUAT)ON OFlNLETNOZZ~MINSERV)CP.

NSPEC~.)ON.INDICAT)QNR.E.GINNAUNITNO.1REACTORVESSELMARCH151979

't ROCHESTER GASll(ELECTRICCORPORATIOi'l 89EASTAVENUEROCHESTER, NY14649R.E.GIf'lilAUNITNO.1REACTORVESSELTECHNICAL REPORTTR-3454-1 ASHESECTIOf'l XIFRACTUREHECHANICS EVALUATION OFINLETNOZZLEINSERVICE

.Ii'lSPECTIOi'l IffDICATIOff i~1ARCH1",1979)iiTELEDYNEENGli4E=~lNG SERViCES303BEARHILLROAD'P/ALTHAiYi, MASSACHUSETTS 02154

TABLEOFCONTENTSABSTRACT

3.0 DESCRIPTION

OFVESSELANDREPORTEDFLAW4.0COMPARISON OFGINNA-1REPORTEDFLAWWITHPREYIOUSLY EVALUATED FLAWS5.0MATERIALPROPERTIES 6.07.08.0PRESSURE-TEMPERATURE LIMITSSTRESSANALYSiSFATIGUECRACKGROWTH9.0FRACTUREMECHANICS ANALYSISANDCRITERIA10.0ELASTIC-PLASTi'CANALYSISAPPENDICES A.STRESSANALYSISB.EF"=CTOFFLAWSiZEANDTOUGHNESS VARIATiONS C.E"FFECTOFAPPLIEDSTRESSVARIATiONS D.ELASTiC-PLASTICEVALUATION A4-3

ENG',NEWlRG SERVICESABSTRACTITheInservice Inspection indication ofanearmid-wallflawinthereactorpressurevesselinletnozzleN2hasbeenevaluated inaccordance withtherequirements ofSectionXIoftheASHEBoilerandPressureVesselCode.Thereportedflawsatisfies theCodecriteriaforacceptance byeval-uation.Therefore, atleastwithrespecttothisindication, thevessel.isacceptable forserviceasiswithoutremovalorrepairoftheindication.

\1.0INTRODUCTIOH R.E.G>nnaUnitHo.1isaWestinghouse PWRwhichwentintocommercial serviceinJune,1970.Thereactorpressurevessel,constructed bytheBabcock6Wilcox.Companywas.subjected toanInservice Inspection inaccordance withTechnical Specification andSectionXIoftheASHEBoilerandPressureVesselCoderequirements.

Whencertainalleviating factorsarenotconsidered, anultrasonic indication inexcessofthesizepermitted foracceptance byexamination wasidentified intheweldwhichattachedaninletnozzletothevessel.Insupportofotherapproaches beingfollowedbyRochester GasandElectricpersonnel,.

TeledyneEngineering Services(TES)wasrequested to,eval-uatethereportedindication inaccordance withtheSectionXIrequirements foracceptance byevaluation.

Thisreportcontainstheresultsofthatin-.vestigations~

A4-5

Z.OCONCLUSIONS 2.1Thereportedflawsatisfies theCodecriteriaforacceptance byevaluation, soisacceptable forserviceasiswithoutremoval~~orrepairoftheindication.

2.2Forthereportedflaw,ofdimensions:

Through-wall depth=2a=0.93inchesLenth=I=5.3inchesEccentricity

=e=1.0inches,thecalculated stressintensity factoris9.2ksi~in.TheCodeacceptable valueis63.2ksi/in.Therefore, thetotalfactorofi21.7ascornaredtothecoderequiredfactorofsafetyof~10:3.16.2.3Theeffectofvariations inflawsizeortoughness ofthematerialcanbedetermined romFigure1.Basedupontheresultsplotte'hereon,aflawofthrough-wall dimension 2a=4.0inches,wouldsatisyCodeacceptance requirements evenifthetoughness we.oreducedzo67ksivin.Theef-"ofvariant.onsinapp1iedstressacrossthe7(awcan"edet.mined=romFigure2.Basedupontheresultsplot-.edtherein,tnerepor-dflaw,Za=0.93inches,wouldsatisfyCodeacceptance require:-;.-=.

tseveni=theappliedstressacrosstheflawwereequa;totheyieldstrengthofthematerial, or51<si,whichever islower.Statddifferently, thecalculatdpressuresLressactiingacrosstheflawcouldbeincreased byafactorinexcessof6wi-;nouiviolation oftheCodecriteria.

2.5Anelastic-plastic fracturemechanics

analysis, following themethodsappliedbyDr.P.C.Parisasaconsultant toNRCtoasimilarinvestigation indicated that:a.Thefactorofsafetyagainstplasticinstability failureisinexcessof3foraflawthrough-wall dimension inexcessof2a=4inches.b.Foraflawthrough-wall dimension inexcessof2a=4inches,yieldingcanoccurandresidualstresses, suchasthosewhichresultfromweldin,'nddiscontinuity

stresses, suchaqthosewhichresultfromterneraturedifferentials orfrompipereactionstresses, wouldbeeliminated fromconsideration.

Althoughthisevaluation resultsintheconclusion thatsuchstressesmaybeignored,suchstresseswereconsidered intheevaluations whichleadtothepreviously listedconclusions.

2.6ThepreviousMCAP-8503 ASHEIII,AppendixGanalysiswasreviewedtodetermine ifthepressureofthereportedflawrequiresare-e!aluat:on oftheAppendixGrequirements.

Itisaconclusion ofthisreviewthattheMestingnouse evaluation ofapostulated flawinthevicinityofanoutletnozzlerepresents amucnmoresigni-f;:cantsituation thandoesthereportedflaw.Tnerefore, accepz-abiiitofthepostulated outletnozzleflawlsfu1tnerconfirmac'.on

,oftheacceptability ofthereportedflaw.A4-7 II>>"

3.0 DESCRIPTION

OFVESSELANDREPORTEDFLAWTheGinnaUnit1ReactorPressureYesse1(RPV)wasfabricated bytheBabcock5WilcoxCompany(85W)totherequirements ofSectionIIIoftheASt<EBoilerandPressureVesselCodeinaccordance withWestinghouse ElectricCompany(W)Equip-mentSpecification Ho.676206Revision0withAddendum676554,Revision0.TheRPVStressReorts'reB8W1966,ReportsNumbers.1through12.rTheinsidediameter, totheinnersurfaceofthecladding, is132inches.Theminimumcladthickness is5/32inches.Thewallthickness is61/2inchesatthebeltlineand9inchesatthenozzlecourse.Thenozzlecoursecontainstwo521/2inchoutsidediameterinletnozzles,two49inchdiameteroutletnoz-'lesandtwonominal4inchdiametersafetyinjection nozzles.Theinletandoutletnozzlesareata-commonel'evation.

AsketchoftheinletnozzleisshowninFigure3,withthedimensions oftheweldpreparation ontheODofthenozzlesketchesabove.Thisconfigure-ion ismportantbecauseitlocatesthereportedflaw.Figure4showstheinne.por-tionofthisweldprepa.ationwiththereportedflawlyingalongthelineAC.Thereweldprparationdimensions aredefinedonaradialplanethroughthevesselcen-erline

(==0'360').Sincetheweldoreparation ismachinedcylindrcallywiththenozzlecenterline, theradialdis-ancebe-'.veen theinsideofthe.esse.and-heweldpreparation landvarieswithradialposition~.Theflawisloca-;edbe-ween305'9<316.5",approximately the10:30o'lockpositionwnenlook':ngalongthenozzlecenterline fromoutsideofthevessel.Figure4indicates

~eradialdistancefromtheRPVIDtoPointDasvaryingbetween4.2and..1inches.Thereportedflaw"through-wall"dimension measuredalongtheweldprepa.ation is0.93inches.Forpurposesofanalysis, SectionXIpermitsthisflawtobre-olvedintoa"throuah-wall" dimension measuredperpendicular tothevess'elsur-facewhichwoulddecreasethe2adimension, Becauseofthecomplexgeometry, advantage isnottakenofthisfactor.Theflawlength,measuredaroundthecir-cumVerence oftheweldpreparation asthedistancebetween305'nd316.5's5.27 ENG)NEER)NG SERVtCESinches.SectionXIdefinestheflaweccentricity asthedistancebetween.theflawcenterandthevesselmidplane.

ThedistancefromthevesselIDtotheflawcentervariesbetweenapproximately 3.55and4.47inches.Conservatively neglecting theincreased thickness resulting fromtheouternozzlecornerradius,therefore takingthetotalthickness as9inches;theeccentrici tyvariesbetweenapproximately 0and1".8asedupontheabovediscussion, andnotingthatanincreaseineccentricity increases thecalculated stressintensity factor,theflawisdefinedforpur-posesofanalysisbythedimensions:

pa=0.93inches1=5.3inchese=1.0inch Ilay AENGINEERING SERVICES4.0COMPARISON OFGINNA-1REPORTEDFLAWWITHPREVIOUSLY EVALUATED FLAWSForpurposesofexamining pressure-temperature limitations, WCAP-8503*

considered theeffectsofaflawadjacenttotheoutletnozzle.Althoughthere~$Naredifferences ingeometrybetweentheinletandoutletnozzles,thestressesareverysimilar.Thisevaluation considered asurfaceflawinaplanepassingthroughtheRPVcenterline ofdepthequalto1.8inches{a/t=0.20)andsurfacelengthof1,8inches{aspectratioof1:6).Sinceasurfaceflawof'givenlengthanddepthresultsinapproximately thesamestressintensity factorasdoesasubsurface.

flawofthesamelengthandtwicethethrough-wall dimension, theWCAP-8503 evaluation isequivalent tothaiwhichwouldbeobtainedforamid-wallflawof2a=3.6and1=10.8inthesameorientation...In fact,theWCAPevalu-'Iationwouldbeveryconservative becausethesurfaceissubject,todiscontinuity stresseswhichhavebutlittleeffectnearmidplane.

Ofevenmoreimportance, however,isthediffe.enceinorientation betweenthetwoflaws.Theindicated Ginnaflawiscircumferential tothenozzleandtheWCAPflawisradialtothenozzle;therefore, thepressurestressnormaltotheWCAPflawisaboutthretimesaslargeast.atnormaltotheGinnaindication.

The.efore,theindic'tdGinnaflawisofconsiderable lesssignificance thanthenozzleflawusedfortheAppendixGevaluation ofiheGinnavesselThemid-wall, nozzleattachment weldflawmostsimilartothatindicesdinGinna-1whichhasbeensubjected toextensveinvestigation byTESandbythe*HRCistheindication inthePilgrim-1 recirculation inletnozzleNZBwhichwasfirstdetec.edin1974andwnichwasreevaluated in1976bybothTESandHRC.Thesignificant parameters maybecomparedasfollows,usingthePilgrimvaluesevaluated byTES:ttWCAP-8'03, "ASMEIII,AppendixGAnalysisofRochester GashElectricCorporation R.E.GinnaUnitHo.1ReactorVessel,July1975.

AFEi~jNEER)NG SERVICESPlant:Depth,2a,in.Length,1,in.Eccentricity, e,in..Hoopstressinvessel,ksi(atoperating pressure)

Yessejthickness 6irma-I0.935.31.016.59.05.2~PI'Irim-11,55.20.5516.27.010.7TheNRCevaluation assumedsomewhatmoreconservative parameters.

SoththeTESandHRCevajuations concluded thawthePilgrim-1 RPYwassatisfactory iorcontinued service.Tnecalculated stressntensiy=actorsforGInna-1woutdbeexpectedtobemuchsmallerthanthosecomputed=orPilgrim-l.

Sasedupontheseiwocomparisons withpreviously evaluated flaws,onewouidjudgethaitheGinna-1vesselwouldeasilysatisfytheSectionXlcriria=oracceptance byevaluation.

A4-11 t'jIt,KIr

5.0 HATERIALPROPERTIES

4~~BaseduponthevaluespublishedinWCAP-8421*,

-theunirradiatedmateria1properties ofthenozzle,usingoutletnozzledata,andoftheweld,usingbeltlinewelddata,areasfollows:LocationRTNDTCyShelf,ft-1bNozzleWeld0.090.236001258018Thecomputedend-of-life fluenceatthenozzleelevation is1.08(IO)atone-quarter thickness.

UsingRegulatory Guide'l.99,Revision1,theend-of-lifeproperties arecomputedas:LocationNDT',fShelf,ft-lbNozzleWeld607011262!I,inWCAP-8503 hasusedanuppershelfKl=200ksi~n.IRTheSect-ionXItoughness versustemoerature curvesareplottedinFigure=foranend-of-life RTi'=70F.sUl"'iCAP-8421, AnalysisofCapsuleRFromtheRochester GasandlectricCorporation R.:.GinnaUnitNo.1ReactorilesselRadiation Surveillance Program,November, 1974.

I 6.0PRESSURE-TEMPERATURE LIMITSTheupperlimitoftheTechnical Specification heatupand.cooldowncurvesarealsoplottedonFigure5.Becausetheselimitsarecontrolled bythe.higherfluencebeltlineregion,full'operating

pressure, ZZSOpsig,isnotpermitted below315F.Thistemperature isonthetoughness uppershelfbyamargininexcessof100F.,

)>TELEDYNEENGINEERING SERVICES7.0STRESSANALYSISThesignificant stressesactingacrosstheflawindication arethoseduetovesselpressureandduetoweldingresidualstresses.

Atthenearmid-walllocation, thermalstressesandstressesresulting frompipereactioneffectsarenegligible.

Thepressurestressesofinterestarethoseactinginaradialdirectionwithrespecttothenozzle.Inthemainshellcourseawayfromthenozzle,theoperating pressureof2250psigcausesahoopstressequalto16.5ksiandanaxialstressequalto8.3ksi.Thepresenceofthenozzlereducestheradialstress,sineataradiusequaltothenozzleboreradiusthestressesmustbeequalto-2,3ksi,Iwhere'the negativesignindicates compression.

Inthecourseofevaluating similarflawsinothervessels,averysimplestresscalculation technique wasfoundtogiveexcellent answersforthepressurmemoranestressacrosstheflaw.Specifically, thevaluesobtainedwiththsim-oleapproximation maybecomparedtoothersolutions asfollows:!!ethodSimp1eapproximat-:.on30finiteelement08C8.710.3membraneinnersurfacemid-walloutersurface20axisymmetric model,doubled7.7innerwall10.0mid-wailThi5slmpleapproximat ionisusedinthisevaluation.inordertoobtainthepressurestressactingnormaltotheF')aw,ascontained inAooendix.A.

><TELEDYNEEiNGIREERNG SERVICESTheresidualstressesusedinthisevaluation areaconservative approximation tothosemeasuredinaheavyweldmentafterpost-weld heattreatment*.

Thesedataindicatethattheresidualstrsssesvarythroughthethickness withacosinerelationship from8.0ksitensileonthesurfacesto8.0ksicompression atmid-wall.Despiteconiirmation ofthepresenceofcompressive residualstressesatmidwallbyremovalofasimilarflawtotheoneunderconsideration inaRP'J.Hocreditistakenforthesecompressive stressesinthisanalysis.

Instead,theresidualstressesareconsidered tovaryasacosinefunctionthroughthethickness with8.0ksitensileonthesurfacesto0ksiatthecenter.Previousevaluation ofarecirculation inletnozzleinaBtlR,whichissub-jectedtolargertemperature changesthanisthesubjectPHRinletnozzle,indi-catesthatthermalstressesarenotsignificant aslongastheflawdoesnotapproachwithinabout11/2"fromtheinnersurface,Thisistrueduringnormalandabnormaloperations becausetheinletnozzleandtheadjacentvesselaresuojected tothesametemperature transient andaresimilarinthickness.

Tnere-fore,thermalstresseffectsarenotconsidered tobeofimportance intherangeoiilawsizesconsidered, 2a<4inches.Pipereactionstressesiniheweldregionareprimarily bendingstressesvaryingiromtensileaionesurfacetocompressive attheother.Sincethere-sortedilawoiinte.estisnearmid-wall, pipereactionstressesacrossthetaware'.'nsignificant.

Asaresultoithisdiscussion, theonlystressesusedinthefracturemechanics analysisofAopendix8arethosewhichresultfrominternalpressureandtheweldr'esidual stresses.

Sincetheresulting stressintensity factorisverylow,aquestionoftenarisesastotheconsequences ofanerrorinthecal-culatedstress.Forthisreason,anadditional evaluation, AppendixC,ismadefortheindicated flawdimensions givingthestressintensity factorwhichwouldbe'computod forarbitrary valuesoimembranestressactingacrosstheflaw.D..'.Ferr'.'(1 P."".~uhlandD.R.l1iller,".'4easurement o7Residua1Stressesina"e'6e'lT.qsr';te'd.,'na

~pumaIResea,cnUDDlemenr.,

tlovemoer i"coA4-15

)<TELEDYNEZG;XEERIXG SERVICESWithrespecttoFaultedConditions, theinletnozzleprovidesthepathforinjection flowforabout40minutesfollowing aLOCA.Forthefirst20secondstheflowisfromthesafetyinjection accumulators atatemperature of90'F.Atthattimethesafetyinjection pumpsarestartedanddeliver155Ffluidfromtheboricacidtanks.At140secondsfollowing LOCAinitiation theflowtrans-ferstotherefueling waterstoragetankandthewatertemperature dropsto'60F.Attheendof40minutesflowswitchestothecontainment dumpandflowisataminimumof140F,Thereactorpressuredropstonearzeroimmediately following aLOCA.TheotherFaultedCondition ofconcernisaLargeSteamline BreakAccidenl(LSBA).Following aLSBAthereactorcoolanttemperature endpressurerapidlydecreases.

Whenthepressuredescreases below1450psig,flowfromtheboricacidstoragetanksentersthevesselat155F.Safetyinjection terminates tenminutesaftertheLSBA.Flowduringtheseeventsisthroughtheinletnozzleanddownthevessel.Becausethenozzleandvesselareofaboutthesamethickness, butsmallthe.maldiscontinuity stressesresult.Analysisofsimilartransient inothernozzlesindicates thermalstressesacrosstheweldoflessthan5ksi.Sincethepressurenasdecreased, thetotalstressintensity factor,fortheFaultedCondition is,smallerthanthatcalculated duringnormaloperation.

Therefore, postulatee sur-facflawsinthevesselbeltlineregionaremorelimitingthanisthereportednozzleweldflaw.A4-16 Cll~J' Ei~tNEERIRG SERY}CES8.0FATIGUECRACKGROWTHBecauseoftheoperating characteristics ofaPWR,theinletnozzletemperature variations withinthepowerrangearenegligible.

Evenwhencoolanttemperature

'changesdooccur,thenozzleandvesselrespondsimilarly inthatthermaldiscontinuity stressesarenegligibl'e inthevicinityofthereportedflaw.Skin-type thermalstressesmaybesignificant atandneartheinnersurfaces, butnotinthevicinityofthereportedflaw.Therefore theonlycycleofimportance togrowthofthereportedflawispressurization anddepressurization.

ForthereportedFlaw,theaKforpres-.surization to2500'psig,thedesignpressure, isonly8.7ksi.An.Forasubsurface flaw,FigureA-4300-1predictsafatiguecrackgrowthrateof8(10)in/cycleforpressurization to2500psig.Therefore nofatiguecrackgrowthispredicted.

l EiMNEERjl4GSERVCES9.0FRACTUREMECHANICS ANALYSISANDCRITERIAThelinearelasticfracturemechanics methodsofAppendixA,SectionXIoftheASMECodeareused.Thesemethodsareconservative, butarenotoverlyconservative intheabsenceofsteepstressgradients asisthecaseinthissolution.

Theacceptance criteriausedarethosebasedonappliedstressintensity factorascontained intheSummer1978AddendatoSectionXIoftheASMECode,IWB-3612.

Thesecriteriaareidentical tothoseusedinthePilgrim-1 evalu-ation,althoughatthattimethecriteriawerereferenced toaJunell,1974letterfromASMEtoBostonEdison.

10.0ELASTIC-PLASTICA!HALYSIS Attachment 4tothe!'(RCStaffEvaluation ofthe1976Pilgrim-1 ISIresults,datedApril21,1976,summarizes anelastic-plastic FractureMechanics Analysisperformed byOr.P.C.Parisasaconsultant toNRC.AppendixOtothisreportcontainsanelastic-plastic analysisapplicable totheGinna-1situation whichfollowsParis'lternative secondary stresscomputation method.Alsoconsidered isthemaximumilawsizewhichwouldresultinretention ofafactorofsafetyofburstofatleast,three.Thisanalysisi.ndicates thataflawthrough-wall (2a)dimension inexcssof4inchesisrequiredto'reducethefactorofsafetybelow3.0,usingananalysiswhichassumesaverylongflaw.Inaddition,thisanalysisshowsthatanyresidualorsecondary stresseswnicharepresentinthestructure willbeeliminated byyieldingaslongastheflawdepth(2a),islessthananu;.-be.inexcessof4".Thatis,weldresidualstresses, thermalstressesandpipereactionstressesneednotbeconside.edinevaluating thevesse!saic-yif2a<4inches.

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ATTACHMENT 3SCOPEOFULTRASONIC EXAMINATIONS OFTHEREACTORPRESSUREVESSELWELDS r~~VI~1 Thefollowing isalistingofmechanized ultrasonic ezaminations ofthereactorpressurevesselweldsandadjacentpipingwelds.Theseexaminations willinclude1/2Tbasematerialforvesselweldsand1/4inchbasematerialforpipingwelds.Alsoshownaretheanticipated ezamination anglesandthedirection ofthebeamcomponent.

Thelowerheadisforgedandhasnomeridional weldsandtheshellcoursesareringsectionswithnolongitudinal welds.Inallcasesthegoalistoexamine100%oftheweldplus1/2Teachsideoftheweld.Examination of100%oftheweldlengthisthegoalalsoforthecircumferential vesselweldseventhough74/S75SectionXIonlyrequires5%.Interference fromothervesselcomponents maylimitthedesiredezamination coverage.

Ifthiswasthecaseinpreviousezaminations, ithasbeennoted.Acompletediscussion oftheindividual ezamination areacoveragewiQbeprovidedinthefinalreportoftheezaminations asrequiredbyRegulatory Guide1.150Rev.l.MechUTexaminations willbeperformed onthereactorvesselweldsandselectedreactorcoolantpipingweldsfromtheinsidesurfaceutilizing thePaRISI-2DeviceandSwHIFastPaRequipment.

Ezamination areasincludevesselcircumferential, nozzle-to-shell, andnozzlepipingwelds.TheMechUTezaminations oftheRPVwillbeperformed inaccordance withtherequirements ofthe74/S75SectionXIandReydatory Guide1.150,Rev.1.Na)"RPVShellandHeadAVelds1)0-degreelongitudinal wave(UTOL)examinations willbeperformed fordetection oflaminarreQectors whichmightaffectinterpretation ofangle-beam results.2)0-degreelongitudinal wave(UTOKV)ezaminations willalsobeperformed fordetection ofreflectors intheweldandbasematerial.

3)45-degree and60-de~eeshearwave(UT45andUT60)ezaminations willbeperformed fordetection ofreflectors intheweldandbasematerialorientedparalleltotheweld.4)45-degree and60-degree transverse shearwave(UT45TandUT60T)ezaminations willbeperformed fordetection ofreflectors intheweldandbasematerialorientedtransverse totheweld.5)InthecaseoftheRPVwelds,SwRI50/70tandemsearchunitsv%beusedtoezaminetoadepthofapproximately 2.25inchesfordetection ofreQectors intheclad-to-base metalinterface areaandalsointhevolumebetweentheexamination surfaceandthedepthofthefirstCodecalibration reQector.

Thesedual-element tandemsearchunitsdevelopaninteractive beamwithlongitudinal

'wavepropagation andproduceanezamination withsignificantly improvedsignal-to-noise ratiooverconventional near-surface techniques.

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b)RPVNozzleAreasTheinlet,outlet,andsafetyinjection nozzle-to-vessel weldswillbeexaminedfromtheboreutilizing 15-degree (forinletnozzles),

10degree(foroutletnozzles)10-degree (forsafetyinjection nozzle)and45-degree beamsfordetection ofreQectors intheweldandbasematerial.

Inaddition, UT45TandUT60Tezaminations willbeperformed fromtheshellinsidesurfacefordetection ofreQectors orientedtransverse totheweldandbasematerial.

Thesetransverse examinations vrillutilizeacomputertocontroltheX-Y-Zmovements ofthePaR.devicetoassureaccuratepositioning aroundthenozzleduringezaminations.

50/70tandemsearchunitswiHbeutilizedfromtheboreandshellinsidesurfacesfordetection ofreflectors locatedintheclad-to-base metalinterface regionandalsothevolumebetweentheexamination surfaceendtheQrstCodecalibration reQectorforthepurposeofsatisfying therequirements inSectionXI.c)PipingWeldsNozzlePiinWeldsFortheinletsafeend-to-nozzle welds,aUTOLscanwillbeusedfordetection ofreQectors whichmightaffectinterpretation oftheangle-beam results.UT45andUT60scanswillbeusedfordetection ofreQectors paralleltotheweldfrombothsidesoftheweld.AUT45Tscanwillbeusedfordetection ofreflectors orientedtransverse totheweld.Theacousticproperties oftheinletelbowsprecludeezamination fromtheelbowside;therefore, aUTOWscanwillbeperformed inadditiontothescansidentifled above.Limitations areexpectedaroundthevesselsupportlugs,safetyinjection andinletnozzlesduetotheproximity ofthesecomponents.

Otherlimitations arelisted.I.Circumferential weldsEstimated time-(2.5shifts)Ringfory'ng-to-lower headweld(RPV-E)Ezamination area0-3600-360Angle0,45,60,50/70 0,45T,60T,50/70T BeamComponent up/dnmv/cdLowersheD-to-ring forgingweld(RPV-D)Ezamination area0-3600-360Angle0,45,60,50/70 0,45T,60T,50/70T BeamComponent up/dncw/ccwLimitations duetoprozimity ofcoresupportlugs@0from(344.20-15.90)CG-190from(74.20-105.80)CG-2180from(164.20-195.80)CG-3270from(255.25-284.75)CGAIntermediate sheD-to-lower shellweld(RPV-C)Ezamination area0-3600-360Angle0,45,60,50/70 0,45T,60T,50/70T BeamComponent up/dnmv/cd 1~h~t

~~D.UppersheH-to-intermediate shellweld(RPV-B)Examination area0-3600-360Angle0,45,60,50/70 0,45T,60T,50/70T BeamComponent up/dncw/ccwII.Uppershellregionarea(A)A.Flange-to-upper shellweld(RPV-A)fromshellEstimated time-(3.0Shifts)Examination area0-3600-360Angle0,45,60,50/70 0,45T,60T,50/70T BeamComponent upcw/cdB.Outletnozzle-to-shell welds(N1A),(NlB)fromshellExamination areanozzle(0-360)Angle0,45T,GOT,50/70T BeamComponent nv/cdC.Inletnozzle-to-shell welds(N2A),(N2H)fromshellExamination areanozzle(0-360)Angle0,45T,GOT,50/70T BeamComponent cw/cdD.Safetyinjection nozzle-to-shell weld(AC-1002),

(AC-1003) fromshellExamination areanozzle(0-360)Angle0,45T,60T,50/70T BeamComponent av/cdIII.Uppershellrey'onarea(B)A.Flange-to-upper shellweld(RPV-A)fromsealsurfaceEstimated Time-(1.5shifts)Examination area0-360B.Vesselsupportlugs'mmination areaVesselsupport(RPV-VSL-1)

Vesselsupport(RPV-VSL-1)

Vesselsupport(RPV-VSL-2)

Vesselsupport(RPV-VSL-2)

Angle18,11,4Angle0,45,60,50/70 0,45T,60T,50/70T 0,45,60,50/70 0,45T,60T,50/70T BeamComponent dnBeamComponent up/dnnv/cdup/dncw/ca,vA1-3 I~wJ'I~~

IV.Nozzleinnerradius,integralmentionandnozzleboreEstimated time-(3.5shifts)~7~~rA.Outletnozzleinnerradiussectionintegralextension regionandnozzlebore.B.Examination areaOutletA(N1A-IRS)

OutletB(NlB-IRS)

OutletA(N1A-IE)OutletB(N1B-IE)InletnozzleinsideradiusregionExamination areaInletA(N2A-IRS)

InletB(N2B-IRS)

Angle10,45,50/70 10,45,50/70 50/7050/70Angle50/70-50/70BeamComponent ToVesselC/Lcw/ccwToVesselC/Lcw/cmvToVesselC/LToVesselC/LBeamComponent cw/cmvcw/cdC.Nozzle-to-sheD weldsfromnozzleboreExamination areaInletA(N2A)InletB(N2B)Angle15,45,50/70 15,45,50/70 BeamComponent ToVesselC/Lnv/cdToVesselC/Lzv/ccwD.Safetyinjection insideradiusregionandnozzleboreEmmination areaSafetyinjection A(ACr1003-IRS)

Safetyinjection B(AC-1002-IRS)

Angle0,100,10BeamComponent ToVesselC/LToVesselC/LSafetyinjection nozzleintegralnxensionEzamination areaAngleSafetyinjection A{AC-1003-IE) 70Safetyinjection B{AC-1002-IE) 70BeamComponent AvWvV.Nozzle-to-piping weldsElbow-toinletnozzleweldsEstimated Time-(3.5Shifts)Ezamination areaInletA(PL-FW-V)

InletB(PL-PV-VII)

InletA(PL-FKV-V)

InletB(PL-FW-VII)

InletA(PL-FW-V)

InletB(PL-FW-VII)

Angle0,45,600,45,6045RLT45RLT45RL45RLBeamComponent AwayfromVesselC/LAwayfromVesselC/Lnv/cdcw/cnvToVesselC/LToVesselC/L 4~I~t B.Nozzle-to pipingweldsExamination areaOutletA(PIPW-II)OutletA(PL-FW-Il)

OutletB(PL-FiV-IV)

OutletB(PIFW-IV)C.Safeend-to-nozzle weldsExamination areaSafetyinjection A(AC-1003-1)

Safetyinjection A(AC-1003-1)

Safetyinjection B(AC-1002-1)

Safetyinjection B(AC-1002-1)

D.Piping-to-safe endweldsExamination areaSafetyinjection'A(AC-1003-2)

Safetyinjection A(AC-1003-2)

Safetyinjection B(AC-1002-2)

Safetyinjection B(AC-1002-2)

Angle0,45,60,45T,60 0,45,60,45T,60 0,45,60,45T,60 0,45>60,45T,60 Angle0,45,45T,60 0,45,45T,60 0,45,45T,60 0,45,45T,60 Angle0,45,45T,60 0745,45T,60 0,45,45T,60 0,45,45T,60 BeamComponent AwayfromVesselC/LToVesselC/LAwayfromVesselC/LToVesselC/LBeamComponent AwayfromVesselC/LToVesselC/LAwayfromVesselC/LToVesselC/LBeamComponent AwayfromVesselC/LToVesselC/LAwayfromVesselC/LToVesselC/L

SCHEDULEOFMECHANIZED EXAMINATIONS FORR.E.GIHHARPVanination AreasCircunferential

'LleldsRPV-E,D,C,-BDay1Day22[12Day3Day412I--I-Day5Day6Day7I12I--I-DaysOn~==Vessel (c="-Crew ShiftUpperShellRegionAreaMelds(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-1003-1 8AC-10021SIPipetoSafeEndAAC.1003.2 8AC-1002.2 NozzleInsideRadiusSectionsandIntegralExtension OutletA(H1A-IRS,-

IE)Outlet8(N18-IRS,-IE)

InletA(H2A-IRS)

Inlet8(H28-IRS)

Safetyinjection AC.1003.IRS,-IE IRS,-IE----X

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