ML18040B104

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Forwards Reactor Pressure Vessel Internals Steam Dryer Rept Summarizing Indications Found During Unit 1 Refueling Outage,Per Request.Indications Will Not Impact Safe Operation of Facility.Related Info Encl
ML18040B104
Person / Time
Site: Susquehanna Talen Energy icon.png
Issue date: 05/14/1985
From: CURTIS N W
PENNSYLVANIA POWER & LIGHT CO.
To: BUTLER W R
Office of Nuclear Reactor Regulation
References
PLA-2471, NUDOCS 8505170393
Download: ML18040B104 (157)
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REGULATORINFORMATIONDISTRIBUTIONTEM(RIDS),ACCESSIONNBR:8505170393DOC,DATE:85/05/14NOTARIZED:NODOCKETFACIL:50387SusquehannaSteamElectricStation~Unit1~Pennsylva05000387AUTHINANEAUTHORAFFILIATIONCURTIS'~N~PennsylvaniaPowerLLightCooRECIP~NAMERECIPIENTAFFILIATIONBUTLERgl4~ReLicensingBranch2

SUBJECT:

ForwardsreactorpressurevesselinternalssteamdryerreptsummarizingindicationsfoundduringUnit1refuelingoutageiperrequest,Indicationswillnotimpactsafeoperationoffacility.Relatedinfoencl'ISTRIBUTIONCODE:A001DCOPIESRECEIVEDILTRENCLjSIZE'ITLE:ORSubmittal:GeneralDistributionNOTES:1cyNMSS/FCAF/PM,LPDR2cysTranscripts.OLo07/17/82'~INk~pno05000387RECIPIENTIDCODE/NAME'RRLB2'C01INTERNAL;ACRS09ELD/HDS4NRR/DLDIRNRR/DL/TSRGNRR/DSI/RA8RGN1COPIESLTTRENCL7766101111111RECIPIENTIDCODE/NAMEADM/LFMBNRR/DE/MTEBNRR/DL/ORAB/METBREG04COPIESLTTRENCL1011101111EXTERNAL:EGLGBRUSKEgSNRCPDR02NOTES:111133LPDRNSIC.03052211TOTALNUMBEROFCOPIESREQUIRED:LTTR31ENCL"28 PennsylvaniaPower8LightCompanyTwoNorthNinthStreet~Allentown,PA18101~215i770-5151NormanW.CurtisVicePresident-EngineeringttConstruction-Nuclear215/770-7501MAY141985DirectorofNuclearReactorRegulationAttention:Mr.W.R.Butler,ChiefLicensingBranchNo.2DivisionofLicensingU.S.NuclearRegulatoryCommissionWashington,DC20555SUSQUEHANNASTEAMELECTRICSTATIONRPVINTERNALS/STEAMDRYERREPORTER100450FILE841-2$203-11$203-10PLA-2471

DearMr.Butler:

InresponsetoarequestfromWarrenHazelton,wesubmittheattachedreportsummarizingtheindicationsfoundduringtheUnit1FirstRefuelingOutageandtheirdispositions.WehaveconcludedthatnoneoftheindicationsimpactsafeoperationofSusquehanna.AlsoattachedarecopiesofinformationrequestedbyMr.HazeltoninasitemeetingonApril9,1985.Pleasecallifyouhaveanyquestionsontheattached.Foryoutinformation,Unit1willrestartinearlytomid-June.Verytrulyyours,N.W.CurtisVicePresident-Engineering8Construction-NuclearEnclosures(2)cc:M.J.CampagnoneNRCR.H.JacobsNRCF$DRSi7P3~3-espDO<g8SOSjyOSppp38~F'DR Enclosure1thpRPVINTERNALS/STEAMDRYERREPORT VII1V8>>~IPVfI 1.INTRODUCTIONDuringinserviceinspections(ISI)ofinternalcomponentsoftheSusquehannaUnitNo.1reactorvesselinSpring1985,severalvisualindicationswereobserved.Thepurposeofthisreportistopresentresultsoftheevaluationofindicationsobservedinthesteamdryer,steamdryersupportbracket,coresprayspargers,feedwaterspargers,IRM/SRMinstrumentdrytubes,topguide,andinaddition,getpumpssetscrewgapsizes.2.SUMMARY2.1STEAMDRYERSUPPORTBRACKET:Oneoffourdryersupportbracketswasfoundtobecrackedduringthe"Unit1firstrefuelingoutage.Thebracketcrackhasbeendeterminedtobecausedbyfatigue.Thebrackethasbeenreplacedwithasimilarcomponent,however,themethodofloadingthebrackethasbeenmodifiedsoastosignificantlyreducethestresses.Instrumentationconsistingofstraingages,differentialpressuretransducers,andaccelerometerswillbeinstalledforthepurposeofinvestigatingthecausativeloadduringthenextoperationalcycle.Theobserveddefectrepresentsnosignificantimpactonplantsafety.2.2STEAMDRYER:ThreegroupsofindicationswerediscoveredontheUnit1steamdryerduringthefirstrefuelingoutagevisualinspection.Thefirstgroupincludedfourcrack-likeindicationsonthedryerhoodswhichsubsequentliquidpenetranttestingprovedtobenotrelevant/non-existent.Thesecondgroupincludedthevanebanktierodwasher-nuts.Thetierodwashernutswerecoveredbyweldedcaptureplatestopreventthegenerationofsmalllooseparts.Thethirdgroupofindicationsislocatedonthedryersupportring.TheyhavebeendeterminedtobeIGSCCcrackswhichhaveamaximumprobabledepthof1/4.inch.,Six'ofthesecrackshavebeenmeasuredfordepthbynon-destructivetechniquesandwill"betrendedfor'crackgrowthratesduringthenext'operationalcycle.Furthermore,analysishasbeenperformedwhich,basedonconservativecrackdepthgrowthassumptions,proves,thatnoadversesafety~,oroperationalconsequencesarisefromoperating;with"theobservedcracksintheUnit1dryer.-2.3CORESPRAYSPARGERInitialinserviceinspections(ISI)ofthecoresprayspargersrevealedoneindicationintheCspargerandoneindicationintheDsparger.Becausetheweldareahadbeenground,itisnotpossibletotellwhethertheindicationsareintheweld,basemetal,orheataffectedzone(HAZ).AsaresultofsubsequentISItheindicationintheCspargerwasconsideredtobeanon-relevantsurfacescratchor

.e)444>>,~,'r>>K<<444444'(i1K(44IIr'uj~<<I<<4I'4444uu4r4II~"4'u~~~4*'4,r4Ir44tl~4;II44I,>>lt,Ir~r(>>verr4ut*I'4f>>I'"~etr)"'liril'py')4J(4u'"4~~ler4cf,'tiluul(I(ii444I4prIjfu'.4II;ei~4*f.44Krfg'4'4I)4<<t4.vi,,KV<<I44E~,CIK4'eu)4(lrlt*i44~.14444,;(llp14~,I'4'4'I,ei44l4' grindmark.TheindicationintheDspargermayalsobeasurfacescratchorgrindmark.However,becauseofthecrack-likeappearanceofthelower0.25"oftheindication(theentireindicationisabout0.75"long)andthefactthatcrackshavebeenobservedinotherBWRcoresprayspargers,theindicationintheDspargerisconservativelyassumedtobeacrackherein.Crackinghasnotbeenconfirmedbymeansotherthanvisualexamination.Themostlikelymechanismfortheobservedcrackinthe"D"spargerisIGSCCduetocoldworkfrompipebendingandgrinding.PossibleadditionalcontributorsareweldHAZsensitizationandresidualweldstresses.ResultsofevaluationsindicatethattheobservedcrackintheDspargerwillhavenoeffectonthestructuralorhydraulicintegrityofthespargerevenduringcoresprayinjection.TheobservedcrackwouldnotbeexpectedtoproduceloosepartsoradverselyaffecttheLOCAanalysis.Asaresult,nocorrectiveactionisrequiredatthistime.2.4FEEDWATERSPARGERInserviceinspections(ISI)ofthefeedwaterspargerrevealedoneaxialindicationinflownozzle14oftheAsparger.Theindicationstartsintheflownozzleelbowandextendsthroughtheadaptorandpossiblyintotheheaderpipe.Apossiblecauseforinitiationoftheobservedindicationinflownozzle14Aishighcyclefatigueduetothermalcyclinginthespargerflownozzlesduringlowflowconditions.Indicationshavenotbeenconfirmedbymeansotherthanvisualexam.Itisconservativelyassumedforanalyticalpurposestobeacrack.Theresultsoftheanalysesindicatethatacrackinaflownozzleisnotlikelytopropagatesignificantlyintothespargerpipe.Basedontheevaluationspresentedinthisreport,itisconcludedthatnocorrectiveactionisrequiredatthistime.2.5TOPGUIDEVisualinspectionsrevealedacrack-likeindicationattopguidegridlocation36-41andsurfaceirregularitiesatseveralothergridlocations.Theseindicationswerenotconfirmedbymeansotherthanvisualinspection.Thecauseofthispotentialcrackisnotknown.Ananalysiswasperformedtodeterminethecriticalflawsizesforthefastfractureofthebeamsundertheworstpostulatedloadingconditions.Basedupontheanalysis,thecriticalcracksizeinthehigheststressedregionofthetopguideisconservativelyestimatedtobeinexcessof3".Eveniftotalcrackpropagationthroughouttheligamentoccurs,itdoesnotposeanysafetyconcerns.Inaddition,anon-irradiatedtopguideatHopeCreekwasvideoinspectedbytheISIteamandrevealedindicationssimilartothoseobservedatSusquehanna.Theseindicationsweredye-penetranttestedandfoundtobenon-cracks.

t'lfIIINIf~NM*'Pt1A1' BaseduponthefracturemechanicsevaluationandHopeCreekinformation,itisconcludedthatnocorrectiveactionisrequiredatthistime.2.6SRM/IRMINSTRUMENTDRYTUBESThreeofthetwelvedrytubeswereexamined.Alloftheexamineddrytubesareintact.Therearenodetectablebendsoroffsetsinanyoftheexaminedtubes.Thethreedrytubesareatcorelocations16-13,16-21,and24-37.Allthreedrytubeshaveseveralsmallfaintindications.Alloftheindicationsareinthenon-pressureboundaryportionofthedrytubessimilartothoseatotherreactors.Onlyonedrytube(16-13)hasalongindicationanditislessseverethanthoseobservedatseveralotherreactors.BaseduponanalysesperformedbyGE,theSRMsandIRMscancontinuetofunctionevenwitha360throughwallcrackofthedrytubes,0becausethetwopieceswillbeheldinfunctionalalignmentbysupportfromtheadjacentfuelbundles.Also,thesupportprovidedbythefuelbundleswillpreventadversesafetyconsequencesfromloosepiecesintheunlikelyeventthedrytubebecomescompletelysevered.4Basedonthisevaluation',SusquehannaUnit1canbeoperatedforatleastone,additionalfuelcyclewiththeexistingdrytubeswithnoadverseimpactonsafety.2.7JETPUMPGAPSThegapsbetweentherestrainerbracketadjustingscrewsandthemixerontenjetpumpswereexaminedusingacameraandvideorecordingequipment.Theexaminationresultedinobservablegapsatfiveofthetwentysetscrewpositions(2setscrewspergetpump).Thelargestgapwasmeasuredtobe0.026incheswide.Fourremaininggapswereobviouslysmallerandthereforewerenotmeasured.AnanalysisperformedbyGEconcludesthatduringnormalbalancedflowoperation,unbalancedflow,andtransientconditions,getpumpvibrationlevelswouldbeacceptableforgapsnolargerthan0.030".Duringsingleloopoperation,jetpumpvibrationlevelsareacceptableifthegapsarenolargerthan0.030inchesandthepumpspeedislimitedto80%ofratedspeed.TheobservedgapsatSusquehannaUnit1arewithintheexperiencebaseofotherreactorsanddonotposeanyrestrictionsduringnormaltworecirculationpumpoperation.

44N44I~IPhC4FgP4'lf4'P44,PPL~PfI)'I'4=PP 2.8REACTORWATERCHEMISTRY:ItisknownthattheBWRwaterchemistryenvironment,evenwithgoodimpuritycontrol,isaggressiveenoughtoproduceIGSCCofstainlesssteelsundersuitablematerialconditionsandstresses.However,impuritycontrolcanslowtheinitiationandpropogationofcracking.ThecontrolofimpuritiesoverthefirstcycleofSSESUnit1hasbeengood.AverageconductivitiesatpowerwerereducedtolevelsconsistentwithBWROGguidelinesduringthefirstthirdofthecycleandhaveremainedthere.ChemistryshouldnothavebeenanexcessivelyaggravatingcontributortoIGSCC.3.DISCUSSION3.1STEAMDRYERSUPPORTBRACKET:3.1.1ComonentDescrition:The',supportbracketisoneoffourshortrectangularprojectionsfromthe-interioroftheRPVthatsupportthesteamdryer.Theyare3x5xllinchforgings,fullpenetrationweldedtoInconelpadsabout10feetbelowtheclosureflangeatazimuth4',94',184',and274'.(SeeFigure3.A-1)3.1.2Indications:Remoteunderwatervideoviewingfirstrevealedindicationsofcrackinginthe184'racket.OnthetopoftheblockneartheRPVwall,asingleindicationcrossedthe3"widthoftheblockfollowingthecontouroftheweldprep.Oneachside,theindicationcontinueddownwardmovingawayfromtheRPVwallinacirculararcwithcenterneartheupperinteriorcorneroftheblock.Fig.3.A-2showstheconfigurationoftheindications.ThisindicationwasconfirmedbylocalVT,PT,UT,andbyphysicalseparationofaportionduringthebracketremoval.TheotherthreebracketswereexaminedbyremoteVT,localVT,andPTwithnoindications.3.1.3Material:ThebracketsareconstructedofforgedblocksofAlloy600Inconel.Priortowelding,theblocksweremillannealedat1700'Fandmachined.ThepadontheRPVisanalloy182Inconelweldbutter.Theblockis)oinedtothepadbySMAWgrooveweldinglg"deepfrombothsides.TherootpasswasbyGTAW,backgroundtosoundmetal.Thebevelanglewas25'.Nopostweldheattreatmentwasapplied.3.1'.4CausesofIndications:Themetallurgicalanalysisinthefollowingsectionshowsthatthebracketfailedbyafatiguemechanism.Sincetheinitiationsiteswerefoundonthesidesurfacesofthebracket,thestresseshadtobehighestthere.Thisimpliesthataflexuralloadwasappliedtothepartinahorizontaldirection.Verticalforceswerealsopresent,howeverafailureduetopurelyverticalforces,suchaswouldbecausedbyliftinganddroppingofthedryeronthebracketshould 4vle~ecIIr haveinitiatedcracksontheuppersurface.Nosuchinitiationsiteswerefound.Sincenostresscorrosioncrackingwasfound,themodeoffailureisfatigue.Examinationofthefailedbracketontheuppersurfaceshowedthatthesupportringwasindirectcontactwiththeedgeofthebracketfarthestfromthereactorwall.Thiswasdifferentfromtheotherthreebracketswhichshowedcontactwiththeseismicblockattachedtothesupportring.Thepointofapplicationoftheloadonthefailedbracketwas80%fartherawayfromthecrackinitiationedgethanwastheloadapplicationpointontheunbrokenbracketdiametricallyopposedtoit.Thisbracket,aswellasthe94',and274'rackets,wouldmostlikelyseethesameforcingconditionsasthebrokenbracket,butbecauseofthepointofloadapplication,themomentappliedtotheweldwouldbeonly56%ofthemomentatthesameweldinthebrokenbracketandthestresswouldbesignificantlylessthanthefailurestress.Anestimationoftheexpectedlifecanbeapproximatedbyusingthematerialfatiguecurveandtheestimatedcyclestofailurefromthemetallurgicalanalysis.ThefatiguedesigncurvefromtheBSPVcodeSec.IIIDiv.1Appendices,1983ed.showsthatinthelowerstressregime,smallstressreductionsproducelargeincreasesinexpectedlife(cyclestofailure).Thus,thenewarrangementshouldprovidealifetimeequaltothelifeoftheplantwithsufficientmarginandcertainlyinexcessofthedurationofthenextfuelcycle.EvaluationofIndications:ThreedifferentsampleswereremovedfromthesupportbracketwhichweresentsubsequentlytoGE'sVallecitosNuclearFacilityformetallurgicalexamination.Sample'A'astakenfromthecenterfrontlefthandcornerofthebracketattheterminationpointofthecrack.Thefracturesurfacewasfoundtobetypicaltransgranularfatiguewithasmallamountofplasticdeformationattheterminationpointofthecrack.Nogrossplasticdeformationwasobservedintheareanorwasthereanybranchingorintergranularcrackingevident.Sample'B'astakenfromthecenterofthelowerrightsurfacecrack.Again,transgranularfatiguewasobservedtobethemodeofcrackpropagationwithbeachmarkingevidentandproceedingfromrighttoleftacrossthesurfaceofthefracture.Thismeansthattheinitiationpointwasclosertothereactorwallthanwherethesamplewastaken.Sample'C'astakenfromthetopportionofthebracketincludingthepointofclosestapproachofthecrackstothevesselwalloverlay.Thiswasalargesampleextendingthefull3inchwidthofthebracketandincludingbothweldmetalandbracketbasemetal.Thefracturesurfaceshowedevidence E1VM1Pi1 of3majorcrackingplanes.Twoplanesoriginatedattherightsurfaceandonefromtheleftsurfaceofthebracket.Ontheonecrackplanefromtheupperrightfractureitwasevidentthatthecrackoriginationpointwasinweldmetal.Thecharacteristicthumbnailprintofafatigueinitiationsitewaspresentandbeachmarkingsofslowirregularfatiguecrackgrowthandriverpatternsoffastcrackgrowthwerealsopresent.Thefatiguecrackinitiationpointwasabout3/4inchbelowtheupperrightcornerofthebracket.Terminationofthecrackwasinthecenterofthebracketatthepointofclosestapproachtothevesselwalloverlay.Theothertwocrackswerealsocharacterizedasfatigueastheyshowedthesamefracturemorphologyasthefracturedescribedabove.Itwasnotevidenthoweverexactlywheretheoriginationpointsofthesecrackswerelocated.Thecrackoriginatingontheleftsurfaceof'thebracketcouldhaveoriginatedanywherefromtheuppercornertobelowthelowestedgeofthesample(about1").Allthreecracksterminatedinthecenterofthebracket.Evidenceofstresscorrosioncrackingwaspursuedwithbothopticalandscanningelectronmicroscopy.AllfractureplaneswerefoundtobetransgranularinnatureandnoevidenceofIGSCCwasfound.Thiswastrueofsurfacesofthebracketintheareasofthebasemetal,theweldmaterialandintheheataffectedzoneoftheweld.Insummary,themetallurgicalinvestigationgivesevidenceoffatiguefailurebeingtheultimatecauseofcrackinginthesteamdryersupportbracket.Threeindependentcracksinitiatedintheweldmaterialatthebaseofthefilletwelds,andprogressedinwardtowardsthecenterofthebracketanddownandawayfromtheweldintothebasemetalofthebracket.Thethreecracksterminatedatthecenterofthe,bracketataclosestapproachtothevesselwallof0.130inches.ThiswasdeterminedbyU.T.NDEtechniquesafterthebracketandallevidenceofcrackswasremoved.Duetotheextentofcracking,thesafetyanalysisassumedcompletefailureofthesupportbracket.Twocriteriawereexamined;loosepartsandstructuralintegrity.Dryerperformanceisconsideredacommercialissueonly.Structurally,the'unctionofthesupportbracketswouldnotbelostbyasinglebracketfailure.Theweightwouldbetransferredtothetwobracketsonaxisperpendiculartothefailedbracket.Tippingwouldbelimitedbythehold-downbracketsundertheRPVheadand,ultimately,bytheskirtinsideofthevesselbelow.Thedryersupportbracketwouldmostlikelywedgeintoastablepositionifitbecamecompletelysevered.Assumingthatallorpartsofthebracketseparate,afailuremodeandv 1yy1>>14I*~11~I'Ijhr~jj~1=jjfIrIf'I~r(',j"'ifjryII'Pg>>Ig'1I'1'~f6P1)~IIg~1kr*rkI1I1~4~1f1$'I~'I'I<<j4H>>~If1<<ly1I1<<,y1<<I"'ll11,'k,I>>k1~P1yl"4~fP1llyjjtftkPyyr1<<fkl'If'g>>If4*j,ltk,'g4'yt"ifll<<jf-,,j,~,~~-*rkIf4,11y/P~g1 effectanalysiswasperformedthatshowedpotentialfordamagetofeedwaterspargers,corespraypipingorgetpumps.Thedamagewouldbedetectableandintheabsenceofanindependentfailure,nosafetyfunctionwouldbelost.Theactualfailureofabracketwouldquitelikelybedetectedduringpoweroperations.Susquehannahasaloosepartsdetectionsystemwhichwouldeffectivelydetectthepresenceofmigratinglooseparts.Inaddition,thecondenserhotwellisregularlysampledforNa-24concentrationwhichisindicativeofmoisturecarryover.3.1.6CorrectiveAction:Thedryersupportbracketat184'rackedduetofatigue,'robablycausedbyahorizontalreversingload.Theotherthreebrackets'atiguelifewerenotsignificantlyimpactedbecausetheloadapplicationpointwasclosertotheRPVwall.Thedryerwillbeinstrumentedbeforeitisplacedbackintoserviceinordertoaidininvestigatingthesourceoftheloading.Inordertoprecludetherecurrenceofbracketcrackingduringthenextfuelcycle,thepointofloadapplicationatthe'84'racketwasmovedbygrindingoutinterferencewiththedryersupportringsuchthattheseismicblockbearstheweight.TheweldpadwascarefullypreparedforinstallationofthenewbracketandthefinalsurfacewasexaminedbyVT,UT,PT,andetchingforsoundnessofthematerial.-Thefinalthicknessoftheinconelweldpadwas.130incheswhichprecipitatedtheuseofspecialweldingtechniquesintherepair.Thenewsupportbracketisidenticaltotheoriginalineverywayexceptthebevelangleontheweldprepwasincreasedto45'ofacilitaterewelding.3.2STEAMDRYER:3.2.1ComonentDescrition:Thesteamdryerisanon-code,non-safety-relatedreactorinternalcomponent.Itspurposeistoimproveoutletsteamquality,especiallywhenoperatingatlessthanfullpower.SeePigure3.B-1forageneralarrangementsketchofthedryer.Thesteamentersfrombelowviathedryerskirt.Theskirtissuspendedfromthedryersupportring,aheavycurvedbeam.Theskirthasfourdrainductsforreturningwatertothevicinityofthefeedwaterspargers.Attachedtothetopofthesupportringarethevanebanks.TherearesixverticalChevrontypedryerbankswithperforatedplateinletsandoutletsanddraintroughsbelow.Thevaneshavespacersstrungoverfourtierodswhoseendspro)ectthroughthevanebankendplates.Thetierodendsarethreadedintodoubleeccentricwasher/nutsetsforalignmentpurposes.Thesteamflowisdirectedintothevanebankshorizontallybythecurvedhoods.Theoutletsteamisdirectedupwardbythebacksideoftheinlethoodtothenextvanebankexceptforthe

~t~'I',gatgaItII"at~a'f*444It'II'I'~)aP.gtIf'>>:gl'IrI=('IafttfJl'1Ig.,'I~FttFaI4II~a',~-,P4444)f>ra'JJ.Jg~f4JPatj44ftagrf-4~IlIt~IIhIf~ggfg)'ff)4~n~If'Id4~,)4'F)'*'atat""*a~-4.gfFa)'I',~4'I'Igf,I4aIC)g'ttfffFg'a'ItaIK)tr)4tI4~'aI'ItaaI'~

twocentralbankswhichfaceeachother.Variousdeckplatesfillthegapsbetweenthecircularsupportbeamandtherectangularhoods.Therearefourliftingrodsattachedtothesupportringwiththreadedeyesontop.TheseinterfacewiththeholddownlugsundertheRPVheadinanearthquakeorapostulatedmainsteamlinebreak.Thesupportringisanassemblyoftwosemicircularbeamswitha3Qx9Qinchcross-sectionjoinedintoacirclebyboltingtocurvedbackingbeamsatazimuth0'nd180'.TheendsofthehalfcirclesremainseparatedtoprovideagapfortheinstallationguiderodsintheRPV.Atazimuth4',94',184',and274',seismiclugsareweldedtotheringstosupporttheweightofthedryerwithoutrockingandtoprovidelateralrestraintinanearthquake.Indications:Remotevideoexaminationwasusedtoidentifyindicationsinthe1984repairareaofthehoodatazimuth40',thevanebankendplateatazimuth0',thedryersupportringatmany'ocations,andthetierodwasher/nutsets.Theindicationsonthehoods,boththe1984repairareaandtheendplateat0'zimuthwereexaminedbyPT.Therewerenorelevantindicationsasaresultofthisexamination.Thewasher/nutsappearedtobedamagedbasedontheremotevideoexaminationandhavebeenrepairedbyweldingcaptureplatesoverallwasher/nutsets.TheindicationsinthesupportringwereconfirmedbyPT.Noneoftheindicationsprogressintohoodordeckplateattachmentwelds.Figures3.B-2showtheapproximatelocationsofarepresentativesampleofrelevantindications.Material:TheentiredryerisconstructedofType304stainlesssteelsheetsandplates.Thedryersupportringisa3Qx9Qinchrectangularbeamthatisrolledintothesemicircularshapeandmachinedtosquareit.Theheattreatmentconsistedofannealingofthebarpriortorolling.Noheattreatmentwasappliedpostforming.CausesofIndications:TenareasofthesupportringanddryerhoodweldswerephotographedatthetimeoftheP.T.examinationstorecordthelocationoftheindications.Nocrackingwasrevealedinanyoftheweldedplates,butmanycrackswerefoundonthesupportringitself.Allofthephotographedindicationswerewithin3/4"ofaweldandtheonemetallurgicalsampletested,takenneartheweld,showedmildsensitization(precipitationofcarbides).Becauseofthecloseassociationofthecracks 1~1ItIP<<PIrt'~.<<III<<atI,'~~'a<<PEP"PII<<1~Itl=<<IIlltP<<~~I"1P,t<<))~Il~t withwelds,itisimpliedthatboththeresidualstressesneartheweldandtheheataffectedzonecontributedtothecrackingphenomena.Although3/4"isfartherfromaweldthanonenormallyconsidersasensitizedzone,itmayhavebeencloseenoughtobesensitizedalongwiththefactthatthematerialwasinacoldworkedstate;i.e.itwasformedintoaringaftersolutionheattreatment.3.2.5Evaluationofindications:Thesteamdryersupportringexhibitedindicationsontheverticalsurface,thecornersandtheupper(andlower)horizontalsurfaces.Ametallurgicalboatsamplewasobtainedfromeachofthesethreesurfacesandanalyzedbybothlightandscanningelectronmicroscopyforfracturemorphologyandothercharacteristics.~DamlePositionDistancefromCornerCrack~DethVertical225'urfaceCorner210'pperSurface47'6II00II07II'3/8"fromweld)0.231"0.167"0.160"Thedepthofeachcrackwasdeterminedbygrindingoutthesampleareauntiladyepenetrantexamdidnotrevealthepresenceofacrack.MetallographicevidenceshowedthateachofthecrackswasIGSCCinnature.Hardnesstestswereperformedonthemetallographicsamplestakenfromthering.Thesamplesshowedsurfacehardeningwhichisindicativeofcoldworkingduringmanufacture.Therewasnoevidenceoffatiguefailure.Therewassomeevidenceofaveryshallowlayeroftransgranularcrackingonthesurface.Onlythesampletakenfromthetopsurfaceoftheringshowedevidenceofsensitization.ThiswasdeterminedonrevealingthecarbideprecipitatesbyanOxalicacidetch.OneoftheremainingtwosampleswasgivenanE.P.R.testtomeasurethesensitizationandtheresultsshowedthismaterialnottobesensitized.Theringwassolutionannealedandthecarboncontentis0.056%soitislikelythatthesensitizationonlyappearsinorneartheheataffectedzonesoftheweldsandnotinthebulkofthering.Whilethecracksnearthesurfaceshowedoxidation,theIGSCCcracksdeeperinthemetaldidnotexhibitoxidationproductsandthereforetheywereconsideredtobefreshandactivelygrowing.Edaxanalysisofthesurfacecontaminantsdidnotrevealanyunusualelements;onlythoseofthebasemetalandtheP.T.examinationmaterials.Insummary,theringcrackingisbasicallyIGSCCinnaturewithasmallamountoftransgranularcrackingwhichwasvery vIPIIII'~~'EfI,Py>>tIf,(I"414*>>hhtth',t>>)gP(1>>fIIE'hIIvfffI','(E"IE>>tI~l\~'~>>(I~II,IIb~1(i'hff,jhItt-ht.,$.,~ttahI shallow.Itispeculiarthatonlytheringitselfiscrackingandnotanyoftheremaining304stainlesssteelplateswelded'otheringortherestofthedryer.ThismayindicatethatthematerialismoresusceptibletocrackinitiationbyIGSCCduetohighresidualmanufacturingstressanddeformationthantheremainderofthedryer.Thecracksintheirexistingstatearenotlargeenoughtohaveanysignificantaffectonstructuralintegrity.Basedonaconservativeestimateofcrackgrowthrate,thecrackswillremaintoosmalltoaffectintegritythroughoutthenextfuelcycle.Therefore,thereisnoimpactonsafety.3.2.6CorrectiveAction:WebelievethestressesthatcontributedtotheIGSCCcracksinthedryersupportringareduetomanufactureandtheoperatingstressesareverylow.Weexpecttoseeverylittlecrackgrowthduringthecomingfuelcycle,Inordertoprovethis,sixcrackareashavebeenidentifiedbypunchmarksandnon-destructivelytestedfordepth.Thedepthreadingsarealllessthan1/4"whichisconsistentwiththecracksintheboatsamples.Atthenextrefuelingoutage,thesewillbemeasuredagainandappropriateactiontaken.3.3CORESPRAYSPARGERS3.3.1ComonentDescrition:ITheSusquehannaUnit1co'respray'spargersareshown'n"Figures3C-1and3C-2.Therearetwoindependentcoresprayspargers;anupperspargerwithbottommountednozzlesandalowerspargerwithtop-mountednozzles.Eachspargerconsistsoftwoapproximately180spargerhalves.Eachspargerhalf0(A,B,C,andD)consistsoftwo4"Schedule40headerpipes(spargerarms)weldedtoa6"schedule40inletpipe(junctionbox).Thejunctionboxisweldedtotheuppershroudviathesealring.Thespargerarmsaresupportedbybracketsweldedtotheuppershroudattwolocationsinadditiontothesupportattheinletpipe.3.3.2Indications:AremoteunderwaterTVexaminationoftheaccessibleportionsofthecoresprayspargersandcorrespondinginternalpipingwasperformed.Twoindicationswerefound.A1/4"-3/8"0indicationwasfoundinthe"C"Spargerat187.(Figure3C-3)Thelocationofthesurfaceindicationwaspossiblyintheheataffectedzoneoftheleftspargerarmtojunctionboxweld.Also,a3/4"indicationwasfoundonthe"D"Spargerat172'.(Figure3C-4)Thelocationofthisindicationwaspossiblyintheheataffectedzoneoftherightspargerarmtojunctionboxweld.Cleaningoftheaffectedareaswasperformedafterwhichthe"C"Spargerindicationwas 4>>HVsI>>)I")'I"'fCK~r'VIK,,r~>>~r.lvrr44'1rllPr)4H4~HI~I~frVl~II,lI~~I~*KIfg4~Vs'fVl>>llH,PIPjlP~H)KJ'ffV),~rlI,>>>>4~)4I/>>plgirCrr4VhI,Ivf"vV4aPVj,Kff'>>gvIIrr~III'4Cls~4)I~,:4~VgII~>>'rg~If'ft~~VI>>4r~"I~IIIII'V4Vjrg4I~))I)~"lf determinedtobeanon-relevantsurfacescratchorgrindmark.Onlythe"D"Spargerindicationremainedrelevantaftercleaning.Theindicationfoundonthe"D"CoreSpraySpargerwasdispositionedtobea"crack"bytheNDELevelIIIinspector.Itwasverytightwithawidthcharacterizedas'essthan0.001inch.Thisdimensionwasobtainedbyplacingseveralwiresnexttotheindicationandmakinganopticalcomparison.3.3.3Material:ThecoresprayspargersareasweldedType304Lstainlesssteelwithamaximumcarboncontentof0.019percent.Duringfabricationandinstallation,itisnotedthatthe4"Schedule40spargerarmswerecoldbenttotherequiredradiusandthatoneormoreofthespargerhalveswouldhavebeencoldsprung.3.3.4CausesofIndications:Themostlikelymechanismfortheinitiationoftheobservedcrackisintergranularstresscorrosioncracking(IGSCC)duetocoldworkfrompipebendingandgrinding.SuchcoldworkcansignificantlyincreasethesusceptibilityofType304LstainlesssteeltoIGSCC.PossibleadditionalcontributorstoIGSCCareweldHAZsensitizationandresidualweldstresses.Inaddition,previousobservedcrackinginBWRcoresprayspargershasbeenattributedtoIGSCC.3.3.5EvaluationofIndications:EvaluationsofthecoresprayspargercrackhavebeenperformedbyPPSLandourconsultants.Theanalysesaddressstructuralandhydraulicintegrity,looseparts,andtheeffectonLOCAanalyses.Theresultsoftheanalysesarepresentedbelow.Theanalysesindicatethattheobservedcrackinthe"D"spargerwillhavenoeffectonthestructuralorhydraulicintegrityofthesparger.Theanalysesaddressedpotentialsourcesofstressresultingfromfabrication,installation,normaloperation,andoperationduringapostulatedLOCA.Therearenosignificantprimaryloadsonthecoresprayspargersduringnormaloperationorcoresprayinjection.Secondarythermalstressesarenotaconcernforafewcycles.Residualstressesfromfabricationandinstallationvaryfromtensiontocompression.Thus,crackarrestwouldbeexpectedasthecrackpropagatesintothecompressionzone.Ananalysiswhichboundstheeffectsofcoresprayspargercracksindicatesthattheeffectoncorecoolingisnegligible.Becausespargerstructuralintegrityhasbeendemonstrated,loosepartsareunlikely.However,loosepartsanalysishasbeenperformed.Theconclusionisthattheprobabilityofunacceptableflowblockageofafuelassemblyorforunacceptablecontrolrodinterferenceisnegligible.The ltI~rN*p,1Ipt potentialforcorrosionorotherchemicalreactionwithreactormaterialsisessentiallyzerosincethespargermaterialisdesignedforin-vesseluse.LoosepartsarenotexpectedtocausedamagetotheotherRPVinternals.3.3.6AboundingcalculationofthelimitingLOCAwithapprovedAppendixKlicensingmodelbutwithCCFLbreakdowninputbasedonlargescaletestsresultsinamaximumPCTofapproximately1400'F(800'margintolicensinglimitof2200'F).NocreditforsteamcoolingortheimproveddecayheatcorrelationwhichwouldfurtherreducethePCTareincludedinthiscalculation.CorrectiveAction:FIIItisconcludedthatSusquehannaUnit1cansafetyoperateinthepresentconditionandno'orrectiveactions.arewarrantedatthistime.3.4FEEDWATERSPARGERINDICATIONS3.4.1ComonentDescritions:TheSSESFeedwaterSpargerdesignconsistsofsixspargerheaderseachcontaining18topmountedweldednozzles.Anozzleconsistsofa90'lbowweldedtoanadaptor(Figure3D-1).Thespargersaresupportedateachendbyendbracketsthatarepinnedtosupportlugsweldedtotheinsidediameterofthereactorvessel.3.4.2Indications:Duringinserviceinspectionofthespargers,anindicationwasseenintheareaofnozzle814on"A"sparger(30'zimuth)usingremotevisualexamination.Theindicationcanbecharacterizedasrunningaxiallytothetwonozzleweldswithitsupperlimitgustbeyondtheelbowtoadaptorcircumferentialweldandlowerlimitonthespargerarmappearingtobranchoutinafaintstarburstpatternbetweennozzles,,l3and14(SeeFig.3D-2).Fromthevideotapesitisnotpossibletoseetheindicationgoingthroughtheelbowtoadaptorweldbuttheindicationsintheelbowandadaptorappeartolineuponoppositesidesoftheweld.3.4.3Material:Thefabricatedspargerassemblyistype304stainlesssteelinthesolutionheattreatedcondition.Theheadersare6"schedule80Spipe.3.4.4CausesofIndications:Crackshavebeenobservedinasimilarfeedwatersparg'eratoneotherplantandthecausehasbeenattributedtohigh12-

~I38)N>5*qtI'~'r>IIII')4II4'I~fil38I!~)'f>84'Wf'!')llI>>I't))>'8)kf),Q)Ž,'.I;8~3'l8.!h.)8')I'~,tD".'"I-k),'I4',)w!Daeva'M'"Dwa>>)84'I44f'"8)4MDr'))M>tf,t~>l>>"8IW)tlIvVh4'38l>>tpFf)8~,Cf*>)))v<-,.)r)I>>~t5rh8'8Tht~IIlllr=I'3II>>'~lh8))))Ill81>N,48'k8t'I'\IIIIh,~'4IN cyclefatigueduetothermalcyclingduringlowflowconditions.However,thepreviouscrackinghasbeenorientedcircumferentiallywithrespecttotheweldsandinspargersthatwerenotsolutionheattreated.Ifacrackexists,thecauseofcrackinitiationisuncertain.Themagnitudeofthermalloadsnecessarytoinitiateacrackwouldlikelyhaveresultedinamoresevere'crack.Inaddition',wewouldhaveexpectedtoseeindicationsonothernozzles.Thereforethepossibilitythattheindicationistheresultofthegrowthofapre-existingmaterialdefectinthebasemetaloraweldcannotberuledout.EvaluationofIndications:Asaconservativemeasure,theindicationhasbeenevaluatedasifitwereacrack.Sincetherearenoprimaryloadsonthespargers,fatiguecrackpropagationcanonlyoccurduetoathermalgradient.Suchathermalgradientispresentonlyduringlowflowconditions.Thethermalstressesinthespargerpipewouldbeexpectedtobemuchlowerthanintheflownozzles.Theresultisthatacrackinaflownozzleisnotlikelytopropagatesignificantlyintothespargerpipe.TheGEanalysishasconservativelyconcludedthatcrackgrowthoverthenexttenmonthfuelcyclewillnotexceed0.5in.Thecriticalcracksize,calculatedat6inches,willnotbeexceededevenifaconservative2inchcrackisassumedtoexistonthesparger.Also,fieldoperatingexperiencewiththeolderGEspargerdesignhavingflowholesratherthannozzleshasshownthatcracksinthespargerheaderstendnottopropagatearoundthepipe.Becausecontinuedspargerstructuralintegrityhasbeendemonstrated,loosepartsarenotexpected.However,GEhasperformedaloosepartssafetyevaluationanddeterminedthattherearenosafetyconcernswithpostulatedlooseparts.CorrectiveAction:TheLevelIIIinspectorcontractedbyPP&Lforin-vesselvisualexaminationshasdispositionedtheindicationasnon-relevantandPP&Lconcurswiththisdisposition.Nocorrectiveactionsarecurrentlyplannedforthefeedwaterspargers.13-

~1klt4lif4))44(taI~fn4I~J4[4'llI'I414))'<'l~~I'IVINN4r1~44I4'4),ft'CIl444'1It4it")~r,'4I4Itlil'*$If)a4~"')14atil~'I44,r,4~~4IY.0a4f14)~I:4'4lt4f4t('Ifpa4)N,.I*;*)N11l'4,444"1I'Jp4,*'I,'Nfl'Iill~4)lf)ft'$)4)4) 3.5TOPGUIDE3.5.1ComonentDescritionsThetopguideassemblyconsistsofanetworkofinterlockingbeamswhichformahighlyredundantgridlikestructure(Figure3E).Intheareasofinterest,particularlythecentralhighfluenceregions,therearenoweldspresent.Thepurposeofthetopguideistoprovidelateralsupporttotheupperendofthefuelbundles.3.5.2Indications:Duringinserviceinspectionofreactorinternalscomponents,nineteentopguidegridlocationswereexaminedusingremotevideoequipment.Severalgridlocationsexhibitedanirregularlycontouredcrud-likesurfacedeposit.Particularattentionwasfocusedongridlocation(X-36,Y-41)whereacrack-likeindicationwasseeninthecentralportionofthebeamawayfromtheligaments.Surfaceconditioningwasperformedresultinginapparentremovalofpartoftheindicationandtheremainderappearedfaint.3.5.3Material:Thetopguideismadefromtype304stainlesssteelinthesolutionheattreatedcondition.3.5.4CausesofIndications:Theexactnatureandcauseoftheindicationat(X-36,Y-41)isunknown.TheloadingonthetopguideduringnormaloperationproducesnegligiblestressesinthebeamsandthereforeIGSCCisnotexpectedtooccurbecauseofthenegligibleloading,thefactthatthematerialissolutionheattreatedandthattherearenoweldspresentintheareasofinterest.3.5.5EvaluationofIndications:Afracturemechanicsanalysisofthetopguidewasperformedassumingathroughwallcrack.Theanalysisisbasedonafracturetoughnes~associatedwithamaximumaccumulatedfluenceof4.5X10nvtattheloweredgeofthebeamswhichisessentiallyatthetopofactivefuel.Faultedeventloadingconditionswereusedsincetheyrepresenttheworstcaseloads.Theanalysisconcludesthatthecriticalcracksizeinthehigheststressedlocationofthetopguide,i.e.,inthebottombeamcutoutregionoftheligamentsisinexcessof3inches.Furthermore,eveniftotalcrackpropagationofanentireligamentoccurs,itwouldnotposeanysafetyconcernsduetothehighlyredundantdesignofthetopguide.

I~II~"<<<<"I~4~5/5I5h~~5t<<g545IdI>>g}I5q,'4)4II5I')>5d>>J'55I',5I'p>>I4~I~~*4II4<<III/'5I<<IIi~ddI~II4<<f")'"I44I<<II'dd'5',554I~'4>>5,<<~I<<I'/55JI4IJ~~5g<<pI44~ll5<<5'5,5I~44 Inordertoestablishabaselineagainstwhichthevarioussurfacephenomenacouldbecompared,asimilarexaminationwasperformedontheunusedHopeCreek2topguide.WhiletheHopeCreektopguideisnotstructurallyidentical,itisofsimilardesignusingthesamematerialandfabricationprocessesthatwereusedfortheSSEStopguide.TheHopeCreektopguidevideoexaminationrevealedundermagnificationalargenumberofsurfaceindications.Thesurfaceconditionappearedtobesimilarto-thatoftheSSEStopguideexceptforashinyappearanceratherthanadullcrud-likeappearance.ThecontractedLevelIIIinspectoracknowledgedthesimilarityofthesurfacesbutnotedthattherelativeseverityoftheindicationsonthetwostructurescouldnotbecomparedduetoilluminationdifferences.NineHopeCreektopguideareasexhibitingvariousindicationsweredyepenetrantexaminedandnorelevantindicationswerefound.3.5.6CorrectiveAction:BasedonthefactthattopguideloadsarenegligibleduringnormaloperationandbasedonthesimilaritybetweentheobservedindicationsintheSSESandHopeCreektopguides,PPGLdoesnotconsideritlikelythattheobservedindicationrepresentsacrack.Itislikelytobeanon-relevantsurfaceirregularityenhancedbythecrud-likedeposit.Ifacrackispresent,itislessthanthecalculatedcriticalcracksizeanddoesnotconstituteasafetyconcern.Therefore,nocorrectiveactionisplanned.3.6SRM/IRMDRYTUBES3.6.1Indications:AremoteunderwaterTVexaminationofthreeofthe12drytubesinSusquehannaUnit1wasperformed.Thethreedrytubeswereatcorelocations16-13,16-21,and24-37.Alloftheexamineddrytubeswereintact.Theinspectionrevealedveryfinecircumferentialindicationsinthenon-pressureboundaryportionofthe'rytubes.Alloftheobservedindicationsareinthetubeandtheshaft(Figure3F-1).Noindicationswereobservedintheadapter,guideplugorprimarypressureboundary.Theindicationswerebarelyvisiblewiththelongestbeingapproximately75%ofthecircumferenceinlengthonthedrytubeatlocation16-13.(Figure3F-2).Theindicationsonthedrytubesweredispositionedasnon-relevantbyanNDELevelIIIexaminer.3.6.2Material:ThedrytubesareType304stainlesssteelwhichhasbeensolutionannealed.

vI"ILP.]ifIN CauseofIndications:ThecauseoftheobservedindicationsintheSRM/IRMdrytubesismostlikelyirradiationassistedstresscorrosioncracking(IASCC).CrackingduetoIASCChasbeenseenatseveralotherplantsresultingindrytubereplacement.EvaluationofIndications:Althoughtheindicationswerenon-relevant,abackupanalysiswasperformedwhichconservativelyassumedthata360through0wallcrackexistedintheSRM/IRMdrytubes.Theanalysisaddressedthefollowingconsequencesofcracksindrytubes:looseparts,breachofpressureboundary,functionalandstructuralperformance.Theresultsoftheanalysisarepresentedbelow.Theanalysisshowedthatthereisnopossibilityforthegenerationofundetectedloosepartsduringfuelloadingandtherearenosafetyconcernsforloosepartspostulatedtooccurduringoperation.Thesupportprovidedbythefuelbundleswillpreventadversesafetyconsequencesfromlooseparts.Intheunlikelyeventthatacrackwouldinitiateandpropagatethroughthepressureboundary,asmallleakwoulddevelop.Theresultingleakageisnotsignificanttosafety.ItwasshownthroughanAppendixKevaluationthatleaksofthismagnitudewouldresultinapeakcladdingtemperature(PCT)oflessthanorequalto1000F,whichismuchlessthanourlicensingbasis.TheSRMsandIRMscanperformtheirintendedfunctionevenwithamaximumoffsetofthedrytubesduetoa360through0wallcrackbecausethetwopartswillbeheldinfunctionalalignmentbysupportfromtheadjacentfuelbundles.Therefore,therewouldbenoeffectontheinsertionorremovalofSRMsorIRMs.Therearetwopossiblestructuraleffectsofcrackeddrytubes;seismicperformanceandeffectonflowinducedvibration.A360throughwallcrackinadrytubewillnotaffecttheabilityofthefuelbundlestosupportthecrackeddrytubeduringaseismicevent.Inaddition,operationofadrytubewithapostulated360throughwallcrackwillnot0causeanydamagetothesurroundingfuelchannelsnorfurtherdegradethedrytubeduetothefactthatSRM/IRMdrytubevibrationisprimarilycausedbysmalllevelsoffuelchannelmotion.Thewearfromthissmallmovementisnotaconcern.CorrectiveAction:Basedupontheaboveevaluation,SusquehannaUnit1canbeoperatedforatleastoneadditionalfuelcyclewiththeexistingdrytubeswithnoimpactonsafety.

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3.7JETPUMPGAP:3.7.1Examination:AremoteunderwaterTVexaminationoftheareabetweenthejetpumpwedgeandrestrainerscrewsandthejetpumpmixingassemblyon10jetpumpswasperformed.(Figure3G)Thisexaminationwasperformedtodetermineifgapswerepresentbetweenthewedgeoradjustingscrewsandthemixingassembly.Theresultsoftheinspectionrevealedonereadilyvisiblegapbetweenthevessel-sideadjustingscrewandthemixingassemblyofJetPump/315.Usingatapergaugeandadialindicator,thegapwasconservativelymeasuredtobe0.026in.3.7.2Cause:ThemostprobablecauseforthegapfoundinJetPumpgl5wastheimplementationofaninstallationinstructiontoreducethepreloadonthejetpumpbeamboltassemblies.Theinletmixerhadprobablybeenslightlymisalignedduringtheimplementationofthisinstruction.3.7.3Evaluation:AnalysisbyGEhasshownthatagaplessthan0.030in.isacceptable.Theanalysisassumednormaloperatingconditionswithbalancedrecirculationloopflowandamaximumgapof0.030in.attheRPVsideadjustingscrew.Analysishasshownthatjetpumpvibrationlevelswouldbeacceptableforgapslessthan0.030in.duringunbalancedflowandtransientconditions.Inaddition,duringsingleloopoperation,jetpumpvibrationlevelsareacceptableifthegapsarelessthan0.030in.andthepumpspeedislimitedto80%ofratedspeed.3.7.4CorrectiveAction:Nocorrectiveactioniscurrentlyplannedforthejetpumpgap.Basedonouranalysis,SusquehannaUnit1cancontinueoperation.sjd/e109i:mg-17-".

IVtike7~lv<<IL7kk~'I)<<I"~II.II'I'7IWPryr7VIIWP<<"PI7"~I4~yt'I~I~fl0~I7,7vvr.'7Fv,I'7P7~PI7~~1ov7717'PV'7P~'WitFII7,'7tI,7PIV\<<IC"ltIlI'7I"I~"lf<<k*tt<<<<'I'<<I~7,7vk h~~eeaHreeahl2IC(4(a4Swami4IJX47tJ9~MRCormhol)casaaaesaebeezer~e~a.i(S~Caisu~9a<<archebtrermrgAnalFraPuke.2Pl&sr~mJ~~cr*4Ace4scCAoaClScwg5aaoeeeelWwaaLkeaeRw@aseCeevca%7('4)r>>Ie[$heje~~h1~S)eel)aR4wA)IIjr'a)AA>>~eeeeehaI'AehfiA4SCAI1,]ef$+kAIC'a)arePIIOPaoeli'P5l032(43oaMP$H33F43alaiallgael)i~eaAee<<herw<<a~<<<<eaae<<ehe0Ohhea<<aceee<<ee<<wAeh<<eee<<eche<<<<<<eee~0Ae<<eh<<ca~heee<<e<<haAreaehaeeh<<<<eewIeNaaIOeeee0Aeeeeeh1O)e<<0ahee<<<<aeeeeeeee<<e<<anewe0Iroeea5<<ee<<e>>he<<<<ea<<el(C<<ac<<aahSe<<<<eheacre<<rh~e~ee~e3469.F17-3<<<<eeeest&NJhha4.e)Iah<<CJagafJ~gaIetr'X't')'a5~~Rpl))e'~acL~l$ecrwrAreerrawaae<<hraCAear~Car)cellar)e~~ggfEfvauaCoatee/mate)mmediatom..0ShallRiaa<<ee<<th)gelJ~~~~'f)I~Aa~Owar~ar&laaarI TOPATgk~PRSS/bedFgoHT4IOC'/~A~g5uziugWau~VusrgDeVzaSsWaoreV'ra>CCF7ZrtlyzcArrests/ggu8R>cxErAT/8)A8)MVrg(+go~c~sviaror~wsss88-zsz-4I,3/z/sz)FIGURE8A-2

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FitsIntoTopGuideAdaptorCollarShaft.LOCATIONSOFINDICATIONSATOTHERREACTORSGuidePlugVTTubeSpringLOCATIONOFtoNGESTINDICATIONATSUS/UEHANNAUNIT1PTPrimaryPressureBoundaryInstrumentCavityFlt;UaE8F-iSCHEtfATICOFTOPPORTIONOFDRYTUBE GUIDEPLUGSealNe]dFLOWHOIES0INDICATIONTUBEYiew)View2View3View4FlGURE.5F-2NOTTOSCAMDRYTUBELOCATION16-13 UfTINCMXQLaOATHSINLETELBMglSKa8RACKARES(lKLQNTmYKSSEL)INLETRlSFJlXIXINGASSEXSLYNKQGKNCRKSTRAINKRSLIPFIT'RKACTQRPRESSUREYKSSELRECIRCQLATININLETHQ2ZLE(1TQQCHlETPNP."RISER)PRESSURESEHSIHGINSTRUIEHTTAPOlFFUSERREACTORPRESSUREYESSELPRESSURESENSING~INSTRUMENTTAP(lETPUMPNQ.5,IO,l5AHQ20)CORESHRQUOFlGURzZGlETPUXPASSEMBLY(TYP'ICALOFIO).HAFFLEPUTE APPENDIXA APPENDIXASUSQUKQLNNAIWATERCHEMISTRYDATASusquehannaIwaterchemistryrecordswerereviewedbyGEfortheperiodfromfirstcriticalityonSeptember10,1982toJanuary1,1985.AnoverallsummaryisthatSusquehannaIhadbetterthanaveragereactorwaterconditions,ascomparedwithmostBWRsduringthestartuptestingperiodandtheremainderofthefirstfuelcycle.Fromthesedatathereappearstobenoconnectionindicatedbetweenchemicalimpuritylevelsandthecrackingofin-vesselcomponents.Thedailyplantdataarewellsummarizedbydatasubmitted,asapartialfulfillmentoffuel'arranty,requirements.'...Thesedataare'howninattachedplots,IlkFigure1showsthe,averageweeklyreactorconductivityonatimebase.Theweeklyaveragevalueisderivedasanarithmeticmeanof5to7dailyvaluesinaoneweekperiod.Onlytwoofthevaluesareatorabove1uS/cm.ThissamedataisplottedonalognormalprobabilitygridinFigure2.Acharacteristicofthistypeplotisthatthe50%probabilitypointrepresentsthegeometricmeanofthedataset.Thus,forthestartupperiodandthefirstfuelcycletomid-1984,Unit1hadameanreactorwaterconductivityof'.32uS/cm.Fromexperience,thisisabetterthanaveragevalueforaBWRinearlylifeoperation,andbetterthanabout1/3oftheBWRfleet,eachofwhichhasamorematuredatabase.ThemaximumweeklyreactorwaterconductivityisplottedonatimebaseinFigure3.Thesedataareasub-setoftheweeklyaveragedatainthatonlythesinglemaximumvalueforaoneweekperiodisplotted.Onlytwopointsareshownabove1uS/cm.Itshouldbenotedthatthevalues.inallofthefiguresdonotconsiderreactorpowerleveland,therefore,severalofthelessseverespikesare,infact,associatedwithreactorshutdownconditions.AveragechlorideconcentrationsinthereactorcoolantareshowninFigure4withweeklymaximumvaluesinFigure5.Noneofthevaluesapproachthespecifiedmaximumoperatingvalueof200ppbandbothplotsaredominatedbyvaluesatthelowerlimitofdetectability(20ppb).Overall,Susquehanna1reactorwaterconditionshavebeencomparativelybetterthanotherearlylifeBWRs,andthereisnoindicatedcausitiverelationshipbetweenreactorwaterchemistryandreactorinternalscracking.sjd/e109i:mg P'IC1.kllE0' l4IImWRRmmgmg~~55l5ERSRRRRRHRE!!'l'!9'(ll,.'R,k55iER88'-5,M555ASISIS~

",~HSSRIIII~IFRSSgllll&EkSEIIIIfF.WNSlbllllWSIIllElbllIWmlbllllIII,,W&lmlllWEP~Ql&8IIIll&8lllllll,,MEE>llllMR("NIIIMHSSIIIIIMRRSIIIII,,MESIIIWS,,i)IEIIWRSHIIIWSEIEIIII,,MARklIIMF,:"HRIIIMRRHIIMRSIRllll,,maaklllllmri)kiamlmaamIlmaaEIIIII,,HSSIIIIIINfiSllIIIHEEIIIIIWSNEIIIIILRIIIIIIIWi5~IIlWSEllllllWENIIIII,%%IIIIIIFABRIIII%55mbllllRISSIIIIII~IIIIIi'i~III~MIllII~WE>lllll PPEPPPE1IIImRmmmEEEPPPEP'SPIiIIWWWPEPEE1PPN,6!It"..:ERSI$$1551>WWWWWWWWWWWWWWWPEEPEEEEE,555~55~~55 WWWWWWWWWR%%gg~=-,.SE$55RS555PRgggg~~~~~gi~~gWWWWWWWW0%.i'HI%RWH%%%HRHRRH5~:!SilSlR>EEEIIIPliermmmmRmmmmmRmmmmEEVERERRRERSRSR~~RHNEN%

15~55%551555555Raaaa5a5CaRa5CRMRSELISEE551~~RRRRRRRWHRRRRgli))l,",'!~IIIIglliRRarraaraaraaaerra&W&WW&&&WWWWWW&WW%RHRHRRRRRR%%~~~~R51551 Enclosure21.CompleteCBSIweldinghistoryofweldingandPWHTof-a.shellcourseweld(SA533)b.inconelweldpadc.bracketattachmentweld(SeeAttachment1)2.Detailedwaterchemistryhistorysummaryincludinghighlightsofunusualevents.(SeeAttachment2)3.Tubingmaterialsfor-a.condenserandFWH's:304Stainlessb.NoistureSeparators:CarbonSteelBaffles(Chevrons)4.Knownoccurrencesofunusualairleakageandsourceofproblem(SeeRPVInternals/SteamDryerReport)5.Preliminaryandfinalfailureanalysesreportsbasedonfracturestudy(SeeRPVInternals/SteamDryerReportforPreliminaryFailureAnalysis)II6.Descriptionofsteamdryerinstrumentationtobeinstalled(SeeAttachment6)7.Chemistrydataonsulphurousspeciesinfeedwater:Datanotavailable.CollectionbeganinHarch,1985.8.Steamdryerskirtfabricationinformation:Therewerenoindicationsondryerskirt,thereforenoinformationissupplied.9.RestrictedAccessWeldergualification(SeeAttachment9)10.Bracketandseismicblockloadingpatterns(SeeAttachment10)11.ResultsofNDE(VT)onseismicblocks(SeeAttachmentll)12.ResultsofNDE(PT)on94'274'upportbrackets(SeeAttachment12)

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p'O~OIee~~IeIsIIsI~~lI~e~IIeIII~I~eeI~I~eIe~I'-~~I~Ie'eeI~IIII.I'::eII'""!IIei!e~~!I!eI,I'~I~e~IIIsIIIlI~2eeI~~eIIe~ee~e~I~~II~I~e~\~eII~A~~-.~--IeI'e984OX6o'e~e4es4,3.42~~~}s~.~~..~'.Il37I6,l04e/Ielsleet3.~e~~~Io'~~~~~~ee~43Pe4Q~gg.+hkKSI~...,}ee~~I~eII-S~IOIO3Op5~+IllII'!OjSJO>8/'18'+gc7ff5IIsseg/Cr/Pf//rIy%0)erjj~(yXCQSu~/jig/ 10I00~-"~~C~C"~OI:~+;-I+t-~;fi~~.CI~II~I~III~IlI~,~I~((~~I~~~(I~III~i~~'iIf'~IlIIIf1~!I~~iIII)III'II,II):~IfII~~IiIIIiIIf'2~CC.'~II~~It~II1II~II~~II~II~I'~~~~~II,I~41'I~*~I,Il.o9k1"5~1~~'Jg~3r-'J2~~"~~~-~C~ILIIn~;I(50S.J1'~~J~~~'C1(>>'4M3I~2C'*~'~-IC1C.CCf')o(3kio.i.fr3oPSBojfoIS0oPS'jgI~~~5:Wo<F"tygC(~((,~i.(~p.W..(~<wppCChlof-fdn-'(u,l~.("4-<>pf'oIfICC l0~aII~I~'ssI~asII~Ic~sII~~~IsIsfs~1sI1~-~II~I1!~Is~III!~IaI'Iti~IIs'I~~I~I~I;'I.'IIII':!~s2II~sI'I+saIa~"tI~~aIIssIss!~~sI1~~aia~~Ial.o98aIjOX5~~V4M3'~~~sj2~~-II'tI~~~'tIa--lII~~5.03.J3.-a~~s'~~~W~I-I~~~~jIs'sL=s-L~',jOIl01!gJ 1' Attachment6SteamDrerInstrumentationTemporaryinstrumentationwillbeinstalledonthesteamdryertomonitorloadsappliedtothesteamdryerandit'ssupportlugs.Alsofouraccelerometerswillbemountedtothesteamdryersupportringtomonitorsteamdryermotion.Theseinstrumentswillfeedsignalconditionersandrecorderslocatedinthereactorbuilding.Eightstraingageswillbeinstalledonthesteamdryer.Threestraingageswillbeplacedintwoareaswherecrackswerepreviouslydiscoveredonthedryerbanks.Fivestraingageswillbelocatedinthedryersupportringandtheseismicblockslcoatedat94'nd184'.Fouraccelerometerswillbelocatedonthedryersupportringatapproximatelythefollowinglocations:AzimuthNo.ofAccel90'40'85230'11ITwodifferentialpressureinstrumentswillbefabricatedontheedgeofthesteamdryeratthe90'nd270'zimuths.Thedifferentialpressureinstrumentwillbefabricatedoutofa8"dia.x4"high304SSpipe.A60milplatewillbeweldedoveroneendofthepipe.AI/2"holewillthenbedrilledinthehorizontalendplatesofthesteamdryeratthe90'nd270'zimuths.TheopenendsofthepipedrumassemblieswillbeweldedovertheI/2"holes.Twoorfourstraingageswillbemountedonthe60milplates.Thedifferentialpressureinstrumentwillbefabricatedtothesamestandardsthatappliedtothesteamdryerandwillbeofequalorgreaterstrengthwhencomparedtootherdryerstructures.Wiresfromeachinstrumentwillexitthereactorvesselviatheinstrumentpenetrationinthevesselhead.Theinstrumentwireswillbeterminatedtoajunctionboxlocatedbelowthebellowsseal.Containmentcablingwillberunfromthejunctionboxtoaspareelectricalpenetration.Atemporaryinstrumentationstationwillbelocatedinthereactorbuildingonelevation749.Thisstationwillbecabledtothesparepenetration.SignalconditioningequipmentandrecorderswillbeprovidedbyGE. MrPI4'IWPV~,I~~IM4~~4~41,aPIEt .:;;;f'IKM.KIIgl:,K,LKCYII.l,C,.,.:-:;<.;,:.',:,:.--.'.~~P"jgj'-"'"'",'RECORDOFWELDERPERFORMANCETESTtWaggingPrManualgMaterialSPacification6'W44JMachina0/gg~+to~j~gQofPNo./toPNo.ThLknessiifpipe,diameterandwallthickness)WeldedThicknessRsngiQuallf'iameterRangeQualifiedA~~~rdd-Mmm>APExZd"~~Describe'lierMetal8'illerMetalGroupf&WELDINGPROCEDUREWeldMetalAnalysisN<<A.~SinglePass0SingleArcgLPositionofGrooveIf3G5G,6GUpward0MultiplePass@MultipleArc01G02G03G04G)k5G06G0Downward0PreheatTemperaiurelnterpassTemperaturePostwaldHastrtmentTemp.PostweldHas~estmentTimeATMOSPHEREAC4~2spaziW~4~FORINFORATIONONLY$+r3~~~sgP'PeCurrent/Polsri~~~~Amps~TradeName9-rcVoltsgg~<7"r"c~ForehandgInchesperMinute~ggBackhand0TESTRESULTSREDUCEDSECTIONTENSILETESTSpecimenNo.WidthThicknessDimensionsAreaUltimateTotalLoadilbs.iUltimateUnitStressIPSIICharacterofFailureandLocationTypeandFigureNoResultGUIDEDBENDTESTSTypeandFigureNo.ResultTestConductedByLaboratory-TestNo.RadiographicResults.TestConductedByRADIOGRAPHYTESTLaboratory-TestNo.of.4Sb~e~d4'8>Welder'sNanaStampNo.FrlrP-8'<~2-Whobyvirtueofthesetestsmeetswekfarperfonnanceraqubements.Neo'ortifythatthestatementsinthisrecordancortactendthatthetestvsaldswareprapentLwafdedandtastedinaccordancewiththe,tssfuf~entsofSecdonIXoftheASbtECode.M/qwtr<<,Iv~~l<<7QU~s~~ ';;;i'R".':,."(i'~Ž'",...R;,;-.,;::;;--,:,!gEIIKIIII1KLECT)IIC,;,;-,'~:.;:.'",'l-.'-R')gg,'"",'yRRRlleWagingPrMualg[MaterhlSpeclficationMachine0/ggIsa~+to~g+Q~HofPNo.jtoPNo.ThicknessIlfpipe,diam>>dwallthickness)WeldedThicknessRangeQualified~~~gr+i@meterRss3geQualifieddUDescribeFillerMetalWELDINGPROCEDUEFglerMetalGroupWeldMetalAnalyshWFgMI/SinglePass0SingleArc$?fPositionofGroovelf3G,SG,6GUpward$kMultiplePass$KMultipleArc01GO2GO3G+4GC36GOEGODownward0&c"+>8Q~/ggATMOSPHEREShiagGasComposi'ORINFORMATIONONLYPostweldHea~atmentTemp.TradeNamePostweldH~reatmentTimeTorchGasFlowRatel8-25N4JointDimensggnsperW"4awWeldingCharacteristics~~Current/Polarity~~+~Amps~~~Volts+/InchesperMinuteForehandIBackhandC3TESTRESULTSREDUCEDSECTIONTENSILETESTSpecimenNo.WidthThicknessDimensionsAreaUltimateTotalLoad(lbs.)UltimateUnitStress(PSI)CharacterofFailureandI.ocationTypeandFigureNo.ResultGUIDEDBENDTESTSTypeandFigureNo.ResultTestConductedByLaboratory-TestNo.RADIOGRAPHYTESTTestConductedByLaboratory-TestNo.Welder'sNane.~lpWhobyvirtu>>ofthesetestsmeetswelderperformancerequirements.Wecertifythatthestatementsinthisrecorderecorrectandthatthetestweldswereprepared,we)dcdcndtestedInacoordwaasvhhthetrrLrrrI.~~settu)rementsofSectionIXoftheASMECode,".-.'.,:i:.i?j~Rj,"'R'.",:,",-',.'.,'.'"",":,"..'.",.;,.-"'.l'-,""Ri".';i"'qj@,,:,"(li+~'/'j'i>:.;.'"GllfLsr"RI',c:f'rr.rstfr+fgj~+'"':j',RVi.R'g'- e~rtovGENERALOELECTRICORIGIItIALCOPYO'HEN'7HSIMPRINTlNREDSPECIALPROCESSCONTROLSHEETprojectWee~ec.prreGQ/dProjectNo.~prreSPCSNO.~AS'6-/Rev.~Page/of/DemriPtion:~~~~~retied~M~i~~wEcer~y~T-References~~+A~m&r~~A~~-MOcd~<&,~oAWd~4Sr@~JrZMC.E.~~A~~~,gals.C9S~u~~~9.~maceep~gzio~OD5I/ I'9 ghiGWAL.~VrHEN~QIMPR!NTiNRED'5FEClALPROCESSCONTROLSHEETProjectProjectNo.SPCSNO~~"'ZRev.~Poge/of/D~rinrion:/D~~~~A~gS~~~8~'Wl~rrow/-S'4W~wnr~

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