ML17229B084
| ML17229B084 | |
| Person / Time | |
|---|---|
| Site: | Saint Lucie  |
| Issue date: | 04/07/1999 |
| From: | FLORIDA POWER & LIGHT CO. |
| To: | |
| Shared Package | |
| ML17229B083 | List: |
| References | |
| PSL-ENG-SEMS-98, PSL-ENG-SEMS-98-102, NUDOCS 9904120110 | |
| Download: ML17229B084 (84) | |
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{{#Wiki_filter:St.LucieUnit2DocketNo.50-389L-99-90EnclosureAttaclunentlPSL-ENG-SEMS-98-102Rev2Page1of15ENGINEERINGEVALUATIONOFECCSSUCTIONLINESSTLUCIENUCLEARPLANTUNIT2PSL-ENG-SEMS-98-102REVISION2FLORIDAPOWER&LIGHTCOMPANYNUCLEARENGINEERINGDEPARTMENTSAFETYRELATED9904i20ii0990407PDRADQCK050003898PDR~ PSL-ENG-SEMS-98-102Rev2Page2of15REVIEWANDAPPROVALRECORDNTSTLUCIEUNIT2TITLEEngineeringEvaluationofECCSSuctionLinesLEADDISCIPLINEMechanicalENGINEERINGORGANIZATIONFPLEnineerinREVIEW/APPROVAL:GROUPINPUTREVIEWN/AINTERFACETYPEPREPAREDVERIFIEDAPPROVEDFPLAPPROVED*MECHELECT1&CCIVILDesignBasis**CSIFUELSOTHERN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/AN/ApyyN/Az/sgN/AN/AN/AN/AN/AForContractorEvalsAsDeterminedByProjects"*ReviewInterfaceAsAMinOnAII10CFR50.59EvalsandPLAsFPLPROJECTSAPPROVAL:DATE:OTHERINTERFACES:AtechEnineerinServices,Inc.Form24,Rev2(7/97) ibL-i=Nb-bCM5.50IV@Rev2Page3of15I.PURPOSE/SCOPE
Background:
AR960294identifiedstresscorrosioncracking(SCC)concernswithregardtoweldsintheUnit1ECCSsuctionpipinglocatedinthetrenchbetweentheRWTandRAB.AspartoftheSTAR'scorrectiveactions,PMAI96-11-222wasissuedtoinspectasampleofweldsontheUnit2ECCSsuctionpipingduringthe1998Cycle11RefuelingOutage.Inarelatedissue,CR98-0047waswrittentoaddressexternalcorrosiondepositsidentifiedontheUnit2ECCSsuctionpipinglocatedintheoutsidepipetunnel.ThisCR'scorrectiveactionsincludedWorkOrder98002077toinspecttheUnit2AandBECCSpipingbeforethespringof1999.SixcircumferentialweldsontheECCSsuctionpiping(3/train)inthepipetunnelwerescheduledforinspectionduringtheCycle11RefuelingOutage.OfthethreecircumferentialweldsinspectedonTrainA,oneweldhadarejectableindicationwhichwassuccessfullyremovedbybuffing.Followingtrainswap,threecircumferentialweldsweretheninspectedonTrainB.Allthreeweldshadmultiplerejectableindications;ofthetotal9indications,8wereremovedbybuffingandonewasrepaired.Basedontheseresults,EngineeringrequiredexpansionoftheinspectionsampletoincludetheremainingfourweldsintheTrainBpipingwithinthetrench.Threeoutoffouroftheseweldshadrejectableindications.Ofthetotal8indications,6wereremovedbybuffingand2indicationswererepaired.Basedontheseresults,FPLmanagementalsodecidedtoinspectasampleoftheECCSpipingforexternalorrosiondepositspursuanttoCR98-0047.Supplement2toCR98-0047identifiedtwo5-footsectionsofstraightpipingonI-24"-CS-2(BTrain)exhibitingtheworstvisualcorrosionappearancebeaddedtotheinspectionscope.Threeareaswithineachofthe5-footsectionsofstraightpipewereselectedtorepresenttheworstcorrosionattack.Allidentifiedindicationswithintheseareaswerebuffedout.Purpose:ThepurposeofthisevaluationistoreviewtheoverallconditionoftheECCSsuctionpipinglocatedinthepipingtunneljustdownstreamoftheRefuelingWaterTank(RWT)todemonstrateitwillmeetitsdesignrequirementsduringoperationuntiltheCycle12RefuelingOutage.Scope:Thescopeoftheevaluationisprincipallythe24"diameterUnit2ECCSsuctionpipingbetweentheRWTandtheRABcontained,withintheundergroundtrench.Theevaluationalsoidentifiesothersafetyrelatedundergroundpipinginthesametrenches.ResolutionofthesespecificlineswillbeaddressedinCR98-1944.StainlesssteelpipinginotherplanttrencheswillbeaddressedasafollowupactionforthespecificECCSrepairCR's.Revision1wasissuedtoincorporatetheverifiedAPTECHanalysis.Revision2wasissuedtoincorporatechangesmadebyAptechtotheircalculationinputsandtoboundthepipingsupportmodificationsresultingfromCR99-0445. PSL-ENG-SEMS-98-102Rev2Page4of15II.EVALUATIONsinReuirements:ThesubjectRefuelingWaterTank(RWT)suctionpipingprovidesaflowpathfromtheRWTtotheEmergencyCoreCoolingSystempumpsforuseduringtheInjectionPhasefollowingaDesignBasisAccident.Thisfunctionissafetyrelatedandisaddressedintheplant'sFSARandTechnicalSpecifications.FSARAsdiscussedinFSARSection6.3.2.2.4,theRWTisanatmospherictankcontainingwaterboratedbetween1720and2100ppm.RedundantlinesareprovidedfromasinglenozzleonthetanktoprovidesuctiontotheAand8TrainsofEmergencyCoreCoolingSystemPumpslocatedintheRAB.ThesuctionlinesareroutedtotheRABinabelowgradetrenchwhichisopentotheatmosphere.TechnicalSpecificationsPerT.S.3.5.2inModes1,2,and3(withpressurizerpressuregreaterthanorequalto1750psia)twoindependentECCSsubsystemsshallbeOPERABLEwithindependentflowpathscapableoftakingsuctionfromtheRWT.PerT.S.3.5.3,inMode3(withpressurizerpressurelessthan1750psia)andMode4,aminimumofoneECCSsubsystemshallbeOPERABLEwithaflowpathtotheRWT.erT.S.3.1.2.1inModes5and6,aminimumofoneboroninjectionflowpathshallbeOPERABLEwhichincludesflowpathfromtheRWTviaeitherachargingpumporaHPSIpump,meetingtherequirementinT.S.3.1.2.7bifonlytheRWTflowpathisOPERABLE.DesignBasisTheRWTSuctionlinesmustbeabletopassdesignflowatadesignpressureof60psigandadesigntemperatureof300FtotheECCSpumps,have'theabilitytomaintainthepressureboundaryandtheRABintegrity.OperatingpressuresaredefinedbythecolumnofwaterwithintheRWTtankandoperatingtemperaturesaredefinedbyatmosphericconditions.AsdetailedwithintheTotalEquipmentDatabaseandplantdrawings,LinesI-24"-CS-3(TrainA)andI-24"-CS-2(TrainB)areconnectedtoasinglenozzleontheRWTandprovidesuctionfortheECCSsystems.Thepipingdesignpressureis60psigat300F,withanoperatingpressureof30psigat120F.Thepipeis24"schedule10(wallthicknessof0.250")inaccordancewithEbascoPipeCodeSS-5.Linesl-24"-CS-2and-3aredesignedinaccordancewithASMESectionIII,Class2requirementsandareconstructedofASTMA-358,Class1,Type304material.Unit2iscurrentlyintheSecondTenYearln-ServiceInspection(ISI)Interval.ThecodeofrecordforRulesforIn-ServiceInspectioninthisintervalisASMESectionXf1989.SafetyClassification:ThisevaluationisclassifiedasSafetyRelatedastheContainmentSprayandSafetyInjectionsystemsperformessentialfunctionstomitigatetheeffectsofaDesignBasisAccident. PSI.-EN(3-SiMb-Jii-'iVdRev2Page5of15SeuenceofDiscove/ExaminationEvents:cedingActivitiesSTAR960294identifiedstresscorrosioncracking(SCC)concernswithregardtoweldsintheUnit1ECCSsuctionpipinglocatedinthetrenchbetweentheRWTandRAB.TheSTARidentifiedSCCwithinaweldinline24"-CS-3whichresultedinaweepingthrough-wallleak.AspartoftheSTAR'scorrectiveactions,allremaininghorizontalcircumferentialweldswereinspectedinUnit1andPMAI96-11-222wasissuedtoinspectasampleofweldsontheUnit2ECCSsuctionpiping(3welds/train)duringthe1998Cycle11RefuelingOutage.Inarelatedissue,CR98-0047waswrittenon1/7/98toaddressexternalcorrosiondepositsidentifiedontopquadrantofUnit2ECCSsuctionpipinglocatedintheoutsidepipetunnel.ThisCR'scorrectiveactionsincludedWorkOrder98002077whichwasgeneratedto:1.Clean24"-CS-283ofcorrosionproducts2.Pressurewashthepipingwithdemineralizedwater3.Performavisual(VT)andliquidpenetrant(PT)inspectionofsuspectpitareasonpipingsections4.Performavisual(VT)andliquidpenetrant(PT)inspectionof6circumferentialwelds5.Applicationofanon-leachablechlorideprotectivecoatingsUnit2OutageActivitiesfthethreecircumferentialweldsinspectedonTrainA,oneweldhadarejectableindicationwhichwasuccessfullyremovedbybuffing.NofurtherinspectionsweremadeonTrainA.Followingtrainswap,threecircumferentialweldsweretheninspectedonTrainB.Allthreeoftheseweldshadmultiplerejectabteindications.Ofthetotal9indications,8wereremovedbybuffingand1wasrepairedthroughtheinstallationofabranchconnectionperPCM98135.Basedontheseresults,EngineeringrequiredexpansionoftheinspectionsampletoincludetheremainingfourweldsinthehorizontalrunofTrainBpipingwithintheRWT-RABtrench.Threeoutoffftheweldshadrejectableindications.Ofthetotal8indications,6wereremovedbybuffingandtwoM8135.indicationswererepairedthroughweldrepairsandtheinstallationofabranchconnectionunderPCM9Basedontheseinspectionresultsandtheoutage'smobilizationofinspectionandmaintenanceforces,FPLmanagementrescheduledtheinspectionofaportionoftheECCSpipingforexternalcorrosiondeposits(WO98002077)totheCycle11Outagewindow.Supplement2toCR98-0047identifiedtwo5-footsectionsofstraightiinon1-24"-CS-2(BTrain)exhibitingtheworstvisualcorrosionappearancetobeaddedtotheinspectionscope.Threeareaswithineachofthe5-footsectionsofstraightpipewereselectedtorepresenttheworstcorrosionattack.Allidentifiedindicationswithintheseareaswerebuffedout.AsummaryofalltheinspectionsmadetodateandtheirresultsisprovidedinTable1. Wold¹TrainConditionReportInitialInitialAfterReworkRepairBasollnoFinalRo]ectCharacterRoworkCharacterDocumentWallWall(inches){inches)PSL-ENG-SEMS-98-102Rev2Page6of15Table1:SummaryofUnit2ECCSWeldindicationsandPipeWallCorrosionCellsExcavationAroa{inches)S-3-FW-904NoneCS-3-3-SW-1CR98-1821CS-3-FW-8NoneNone¹1RoundAcceptNone0.2580.196NotAvailableBTrainCS-2-FW-901CS-2-FW-3CS-2-3.SW-1Cs-2-6-SW-3CS-2-FW-2CS-2-FW-4Cs-2-4-SW-1CR98-1879¹1<<5¹6¹7CR98-1878¹21¹22¹23CR98-1877¹6¹16NoneNoneCR98-1897¹10CR98-1898¹2¹8¹12CR98-1906¹11¹13¹14¹15SeeNote4Area1,¹1Area1,¹2Area2Area3,<<2Area3,¹3Area3,¹4Area3,¹5Area3,¹6Area3,¹7ThreeSampleAreason5footBTrainpipesectionwithinEast/WestTrenchSeeNote4Area4,¹1Area4,¹2Area4,¹3Area5,¹1Area5,¹2Area6,¹1Area6,¹2NF=NotFoundCR98.0047Supplement2ThreeSampleCR98-0047Areason5footSupplement2BTrainpipesectionwithinNorth/SouthTrenchRoundLinearLinearLinearRoundLinearRoundRoundRoundRoundRoundLinearRoundRoundRoundRoundLinearLinearRoundNoneRoundRoundLinearLinearRoundLinearLinearLinearRoundRoundRoundLinearRoundAcceptAcceptAcceptAcceptAcceptAcceptREJECTAcceptAcceptAcceptAccept(1)REJECTREJECTAcceptAcceptAccept(1)Accept(1)AcceptAcceptAcceptAcceptAcceptAcceptAcceptAccetAcceptAcceptAcceptAcceptAcceptAcceptAcceptLinearLinearLinearPCM98135CRN.8233CRN-82330.2890.2710.2590.2410.2610.2410.2650.2490.2620.2340.2620.2340.2820.10.4280.4030.3750.3080.2590,25NF0.272NF0.083NF0.1090.275>0.2350.275>0.2350.275>0.2350.2750.2350.283>0.2610.282>0.2610.28>0.2450.2810,2450.281>0.2450.28>0.2450.28>0.2450.281>0.2450.2710.2170.271>0.2170.271>0.2170.270.2610.273>0.2610.2660.2180.266>0.2180.5x1.70.3x1.60.7x1.81.0x2.12.7x1.2Note21.5x1.50.75x0.31.0x0.31.0x0.71.7x0.91.0x1.82.25x1.81.25x1.00.75x1.01.0x1.251.25x1.751.35x1.101.27x2.631.25x1.251.0x1.01.5x1.51.6x1.61.0x1.01.0x2.151.0x1.01.3x1.01.0x1.01.0x1.01.0x1.02.3x1Note5Notes:1.OmissionofIndicationfromthere-examinationLiquid2.Excavationarea]oinedto¹21...3,InitialinspectionscopeonUnit24.SeeTable2fordescriptionofpipeareas.5.Excavationareaoinedto¹1."I)PenetrantExaminationDataSheetindicatesAcceptSelectionoflnsectionAreas:WeldsAugmentedinspectionswereperformedontheUnit2ECCSpiping'shorizontalfieldweldssincepreviousleakageonUnit1wasassociatedwithacircumferentialfieldweldonahorizontalrun.ThefailureanalysisperformedontheUnit1flaw(STAR960294)concludedthattheleakagewastheresultofODinitiatedstresscorrosioncracking,associatedwithstressesfromthefieldweld(andpossiblyarepair)andthepresenceofanexternalcontaminanttattributedtothepresenceofchlorides. PSL-ENG-SEMS-98-102Rev2Page7of15Inspectionswereinitiallytargetedtoaddresspipingfieldweldssincethe24"pipingismanufacturedtoA-358Type304SS,whichreceivesa1900'Fstressrelievingsolutionannealafterformingofthepipeandweldingoftheaxialearn.Asregionsofincreasedstress(necessarytopromotestresscorrosioncracking)wouldbeassociatedwithfieldwelds,theareasselectedforinitialinspectionconsistedofthreecircumferentialwelds.OfthethreecircumferentialweldsinspectedonTrainA,oneweldhadarejectableindicationwhichwassuccessfullyremovedbybuffing.NofurtherinspectionsweremadeonTrainA.Followingtrainswap,threecircumferentialweldsweretheninspectedonTrainB.AllthreeoftheseweldshadmultiplerejectableindicationswithonebeingrepairedthroughtheinstallationofabranchconnectionperPCM98135.DuetotherejectablePTindicationfoundontheseBTrainfieldweldswhichcouldnotberemoved,EngineeringrequiredexpansionoftheinspectionsampletoincludetheremainingfourweldsinthehorizontalrunofTrainBpipingwithintheRWT-RABtrench.Attachment3,Figures182showsthelocationsoftheinspectedwelds.PipingDuetotheTrainSwaptoTrainB,thepipingsectioninspectionsforpittingcorrosioncenteredontheBTrain.Althoughthisdecisionwastimingbased,thisapproachwasconsistentwiththevisualcomparisonbetweentheAandBTrainswhichshowedthattheBTrainappearedtohaveagreaterbuildupofcorrosionproductsatthecorrosioncells.Bothpipeshavemultipleroundcorrosioncellsorpitting(<3/8"indiameter)whichareconcentratedwithintheupper120ofthepipe'shorizontalrun.ItwasnotedthatcorrosionappearstobegreaternearthemanholecoverovertheEast-WesttrenchwhichisoffcenteredovertheBTrainpiping:themanholemaybeasourceofwaterrunoffcontamination.Concentrationofcorrosioninthisareaispresumedtobetheresultoffallingdebris,dirtbuildup,orcontaminants.ItisnotclearwhetherthepresenceofadegradedThermaloxcoatingsystemontheTrainiscontributingtothecorrosionbytrappingcontaminantsagainstthepipewall.ToselectarepresentativeinspectionsampleoftheexternalcorrosiondepositsontheUnit2BTrainECCSsuctionline,EngineeringvisuallyinspectedtheentiresectionofECCSsuctionpipinginthepipingtunnel.Two5-footsectionswereinitiallyselectedforfurtherinspection.Withinthesesectionsofpiping,sixregionsweresubsequentlyidentified(3/section)andpreparedforPTexamination.TheareaswerechosenonthehorizontalrunsofI-24-CS-2intheNorth/SouthtunnelandtheEast/Westtunnel.Attachment3,Figure3showsthelocationsofthesixexternalcorrosionregionsidentifiedforPT.Thepipingregionwiththemostsevereindicationswasconfinedtotheareaapproximately12"eithersideoftopdeadcenter(TDC).Thebottomhalfofthepipeonbothpiperunswasrelativelyfreeofcorrosioncellscomparedtothetopregionofeachsection.Tworegionsineachrunwereselectedfromthemostseverecorrosionindicationintherolledplateandoneregionineachsectionwaschosenontheaxialshopweld.Theregionsselectedwerejudgedtobeeitherrepresentativeoftheothercorrosioncellsorhadthemostsevereappearancebasedonpittingorcorrosionbuildup.Althoughtheselectedregionswereselectedtoincludeaxialshopwelds,elevatedstressesattheselocationswerenotexpectedsincethepipefabricationspecification(A-358Class1)requiresa1900'Fannealaspartofthefabricationoftherolledandseamweldedpipe.TheareasoneachsectioninthepipetrenchareidentifiedinTable2. PSL-ENG-SEMS-98-102Rev2Page8of15Table2:SummaryofSampleAreasforExternalCorrosionDepositsSampleAreaLocationDescriptionofSampleAreaExternalCorrosionDepositSampleAreasintheNorth/SouthPipeRun2"x2"areaat11:00,-6'pstreamfromsupportSI-2407-17(8weldedlugs).2"x4"areaat3:00ontheaxialweld,-3'pstreamfromsupportSI-2407-17(8weldedlugs).2"x2"areaat12:00,-5'ownstreamfromsupportSl-2407-17(8weldedlugs).ExternalCorrosionDepositSampleAContained4corrosioncellswithonehavingvisiblepits.Contained4corrosionscellsontheweldand5abovetheweldontheplate.Areaofdarkeststainwithnovisibledepthtopits.Containedalargecorrosioncellwithaclusterofvisiblepits.reasintheEast/WestPipeRun1"x6"areaat12:00,-6'pstreamfromweldCS-2-FW-4.1"x5"areaat11:30ontheaxialweldseam,-4'pstreamfromweldCS-2-FW-4.1"x3"areaat10:00,-3.5'pstreamfromweldCS-2-FW-4.Contained3corrosioncellswithlargeclustersofvisiblepits.Contained6corrosioncellswithclustersofvisiblepits.Contained4corrosioncellswithathickbuildupofcorrosiondepositundertheThermalox70coatin.FailureMechanism:TheFigurebelowisaphotomicrographillustratingpreliminaryresultsofametallographicexaminationperformedonasampleremovedfromUnit2Linel-24"-CS-2intheregionofWeldCS-2-FW-3.Thehighlybranched,O.D.initiated,through-wallcrackistypicalofchlorideinducedstresscorrosioncracking.FurthermetallographicanalyseswillbeperformedtoevaluatetheproximityofthecracktotheweldandHAZ,andtodetermineifthebasematerialissensitized.ThebasematerialisspecifiedasA-358,Class1,Type304SS.PhotomicrographofSectiontakenatWeldCS-2-FW-3onLinel-24"-CS-2ThemechanismistypicalofchlorideinducedODstresscorrosioncracking(ODSCC).ThismechanismisidenticaltothatpreviouslyidentifiedintherootcauseanalysisassociatedwithSTAR960294(PMAI96-03-249).WithanySCCmechanism,therearethreerequirementsforcrackingtooccur:1)Asusceptiblematerial,2)Atensilestress;nd,3)Anenvironmentwithacontaminant(forexample,thechlorideinsaltair).AlthoughchlorideSCCdoesnottypicallyoccurattemperaturesbelow140'F,anelevatedstressconditioncanlowerthistemperature"threshold". PSL-ENG-SEMS-98-102Rev2Page9of15Thismayexplainwhyindicationsatthefieldweldsareseverebycomparisontothoseintherolledandaxialweldedpipethatwassolutionannealed.ctionXIConsiderations:IJnit2iscurrentlyintheSecondTenYearIn-ServiceInspection(ISI)IntervalandthecodeofrecordforRulesforIn-ServiceInspectioninthisintervalisASMESectionXI1989.SincethesubjectpipingisClass2,therulesofArticleIWCapply.TheflawsandindicationsdescribedabovewereidentifiedduringinspectionsofsampleareasconductedinaccordancewithcorrectiveactionsfromSTAR960294andCR98-0047.WhiletheflawsandindicationswerenotidentifiedduringascheduledASMESectionXIinspection,therulesforexaminationandrepairs/replacementsapplysincethesubjectpipingisSafetyRelatedandwithinthejurisdictionoftheASMEcode.ArticleIWC-3120providesacceptanceandevaluationcriteriaforsurfaceorvolumetricexaminations.TherearefourprimarymethodsofacceptancewhichincludeExamination,Repair,Replacement,orEvaluation:~IWC-3122.1AccetancebExamination"Componentswhoseexaminationreconfirmstheabsenceofflaws,revealsflawsthatdonotexceedtheacceptancestandardslistedinTableIWC-3410-1,orrevealsflawsthatareacceptableinaccordancewithIWC-3121(b)shallbeacceptableforcontinuedservice.~IWC-3122.2AccetancebReair"ComponentswhoseexaminationrevealsflawsthatexceedtheacceptancestandardslistedinTableIWC-3410-1shallbeunacceptableforcontinuedserviceuntiladditionalexaminationrequirementsofIWC-2430aresatisfied,andtheflawshallbeeitherremovedbymechanicalmethodsorthecomponentrepairedtotheextentnecessarytomeettheacceptancestandardsofIWC-3000~IWC-3122.3AccetancebRelacement"AsanalternativetothereplacementrequirementofIWC-3122.2,acomponentortheportionofthecomponentcontainingtheflawshallbereplaced.~IWC-31224AccetancebEvaluation"(a)ComponentswhoseexaminationrevealsflawsthatexceedtheacceptancestandardslistedinTableIWC-32410-1shallbeacceptableforservicewithouttheflawremoval,repair,orreplacementifanevaluationanalysis,asdescribedinIWC-3600,meetstheacceptancecriteriaofIWC-3600."(b)WheretheacceptancecriteriaofIWC-3600aresatisfied,theareacontainingtheflawshallbesubsequentlyreexaminedinaccordancewithIWC-2420(b)and(c)Penetrantinspectionsperformedontenweldswithinthe24"-CS-2and24"-CS-3pipingidentified18indicationsoutsidetheacceptancecriteriaofIWC-3122.2.AsindicatedbyTable2,15oftherejectableindicationsweresuccessfullybuffedoutwithoutviolatingminimumwallrequirements.Attwoweldlocations,3indicationscouldnotberemovedinthismannerasthesizeoftheindicationsexceededIWC-3122.2acceptancecriteria.Inordertoeliminatetheseremainingindications,thefollowingrepairswereperformed. PSL-ENG-SEMS-98-102Rev2Page10of15Table3:SummaryofWeldRepairsonECCSLinesWeldcationRepairMethodologyCodeAcceptanceCS-2-FW-3CS-2-FW-4Indication¹23wasremovedbydrillingahole>>4inchesindiameter.EdgesofmachinedsurfacewerePTinspectedandabranchconnectioninstalledIWC-3122.3inaccordancewithPCM98135.Indication¹12wasremovedbydrillingahole-4inchesindiameter.EdgesofmachinedsurfacewerePTinspectedandabranchconnectioninstalledIWC-3122.3inaccordancewithPCM98135(CRN-8233)Indication¹8wasremovedbyexcavation/weldrepair.Branchconnectionallowedaccesstothebacksideoftheweldforpurgingandfinishgrinding.IWC-3122.2FinalsurfaceswerePTinspected.SeePCM98135{CRN-8233)WhilealloftheidentifiedweldflawswererepairedasindicatedwithinTable3,SectionXldoesallowAcceptancebyEvaluation(IWC-3122.4).Anacceptancebyevaluationapproachwaspursuedinparallelwiththedevelopmentoftheaboverepairmethodologies.Thiseffortwaspursuedtoaddresstheremotepotentialthatarepairmodificationwouldnotbephysicallypossible,orthattheneedforarepairwasidentifiedlateintheoutagescheduleorthatalargenumberofsmallflawswereidentifiedwhichwouldprecludeashort-termcost-effectiverepairapproach.Inanticipationofthepossibilityofadverseinspectionresults,Engineeringelectedtoperformtheadditionalevaluationsinparallelwiththeon-goingexaminationsandreworkmethodologies.AstheSectionXICoderulesspecifiedwithinSectionIWC-3600wereunderdevelopmentinthe1989code,theguidancecontainedwithinIWB-3600wasutilized.Thisactivityisdiscussedinthenextsection.tructuralInteriReview:PreliminaryresultsofflawsizeswereforwardedtoAPTECHEngineeringServicesfortheirassistanceinevaluatingaleak-before-breakapproach.Thisentailsidentifyingthecriticalflawsizethatwouldbeunstableforthedesignconditionsofthepipingnodewiththehigheststress.AnalysismethodsinASMESectionXlunderParagraphIWB-3640andAppendixCwereusedtocomputetheallowablethrough-wallflawlengthandpredictedgrowthasafunctionofoperatingtime.GrowthbySCCandfatiguemechanismswereconsideredintheflawgrowthassessment.Thispreliminaryanalysiswasperformedusingthefollowinginputs:~DesignConditionsof60psigand300Ffora24"nominalpipesizeSchedule10constructedof304SS~MaximummembraneandbendingstresseswereidentifiedfromthepipingstressanalysisforthenodesoftheECCSAandBTrainpipingcontainedwithinthetrenches.Maximumvaluesforeachequationwereselectedtoboundallnodes.{SeeAttachment2)~Assumedmaximumflawlengthof1.35inchesbasedonpreliminaryfieldinspectionresults.Forthepreliminaryanalysis,theallowablethrough-wallflawsizewasdeterminedfornormal/upsetconditionswithaSectionXICodesafetyfactorof2.77forcircumferentialflawsand3.0foraxialflaws.Theallowablecircumferentialflawlengthwascomputedtobe-26inchesandtheallowableaxialflawlengthwascomputedtobe-12inches.Bothofthesestructurallimitsarefargreaterthanthesurfaceindicationsobservedduringtheinspectionandrepairoftheaffectedpiping.Forthefinalanalysis,themaximuminitialflawlengthtobeusedinthecalculationwasdeterminedtobe1.18,basedonactualrecordedindications.Theallowablecircumferentialflawlengthwascomputedtobe32.2inches)andtheallowableaxialflawlengthwascomputedtobe13.6inches.Bothofthesestructurallimitsarefargreater
PSL-ENG-SEMS-98-102Rev2Page11of15thanthesurfaceindicationsobservedduringtheinspectionandrepairoftheaffectedpiping.TheaboveanalysisdemonstratesthattheECCSpipingwouldleak-before-break,therebyprovidingsufficientarningofcrackpropagationlongbeforeanyimminentfailure.Forthemaximumstresses,athrough-wallrcumferentialflawof32.2inches(13.6inchesforanaxialflaw)wouldsatisfytheminimumsafetyfactors.Aconservativeflawgrowthevaluationindicatesthatadequatesafetymarginswillbemaintainedforatleastonecycleofoperation.ItisconcludedthatthestructuralintegrityofthepipingisadequateforalldesignloadsperASMESectionXI.Additionally,leakdetectionbyperiodicwalkdownshallbemaintainedintheareasaffectedbycorrosiondegradation.Thisanalysisapproachisconsideredconservativeasthissystemisnormallyinastandbymodewithatmospherictankpressureheadonthesystem(-30psivs.60psigdesign)andoperatingatenvironmentaltemperatures(<100'Fvs.300'Fdesign).Additionallythepipingisnotsubjecttoanyofthefollowing:vibratoryloading,periodicpumpstartsandstops(cyclicloading),thermalcyclicloading,windloadings,etc.Basedonevaluationoftheidentifiedflawsandtheanalysisofcriticalcracksize,EngineeringconcludesthatmonthlyvisualsurveillancesoftheECCSsuctionlinesforleakswouldbeadequatetoprovideleak-before-breakdetection.TheaboveAPTECHevaluationisfinalandhasbeencheckedandverifiedinaformalcalculationunderAPTECH'sQualityAssuranceProgram.TheresultsoftheflinalanalysisdonotchangetheconclusionsoftheSafetyEvaluation.ConseuencesofAccidentalLeakae:TheaboveevaluationhasdeterminedthattheUnit2ECCSsuctionpipingisacceptabletooperateuntiltheCycle2refuelingoutage.However,intheunlikelyeventthataleakdoesdevelopintheECCSsuctionpiping,anadditionalevaluationwasdonetoshowtheradiologicalconsequenceswouldbeboundedbytheradiologicalconsequencesoftheaccidentanalysisofrecord.ThefollowingdiscussionpresentsargumentswhyasinglepointleakisboundedbythelossofacompletetrainoftheECCSorLPSIpump.Toconformtotherequirementsof10CFR50.46(b)andpart50,AppendixK,ItemD.1,Post-BlowdownPhenomena;HeatRemovalbytheECCSSingleFailureCriterion,analysesofLossofCoolantAccidents(LOCA)atSt.LucieUnit2typicallyassumethateitheronecompletetrainofECCS(forsmallbreakanalyses)oroneLPSIpumpisunavailabletoprovideinjection(andsubsequentrecirculation)flowtothecore.TheseassumptionsareutilizedbecausebreakspectrumandhistoricalanalysesapplicabletoSt.Luciehavedemonstratedthattheseparticularfailuresmaximizethefuelcladdingtemperatureandproducethelimitingsiteboundarydosevalues.Ofcourse,avarietyofothersinglefailuresinvolvingbothactiveandpassivecomponentscanbepostulatedtooccurduringanyLOCAevent.Asanexample,checkvalveV07174whichseparatestheRWTmakeuppipingfromthecontainmentsumprecirculationlineintheAECCStrain(Ref.5)canbepostulatedtofailtoremainclosedtotheenvironmentduringthepost-injectionphaseofaLOCA,potentiallyleadingtothereleaseofliquideffluentandradionuclidestothelocalenvironment.However,anassumptionthatthisfailedvalveconstitutesaviablesinglefailurewouldprecludeconsiderationofanECCStrainoraLPSIpumpasinoperableduringtheinjectionphaseoftheevent.TheavailabilityofasecondtrainofECCSorasecondLPSIpumptoprovidecoremakeupduringtheinjectionphaseoftheLOCAreducesboththeextentanddurationofcoreuncovery,therebyreducingthecalculatedfuelrodadiabaticheatupandtheexothermiczirconium-steamreaction.ThisreducedfuelrodheatupubstantiallylessenstheresultingfueldamageandfissionproductreleaseascomparedtothecasewhereonetrainofECCSoroneLPSIpumpisunavailable.Asaresult,aLOCAeventscenariothatassumesfailureofa PSL-ENG-SEMS-98-102Rev2Page12of15injectiontraincheckvalvetoremainclosedduringtherecirculationphaseoftheeventwillyieldamorebenignsiteboundarydosethanthatresultingfromalossofECCSinjectioncapabilitysuchasisassumedintheSt.Lucie2alysesofrecord.eviewofOtherLinesLocatedinECCSPiinTrench:BasedontheidentifieddegradationoftheECCSpipingwithintheEast-WestandNorth-SouthtrenchesareviewwasmadeoftheotherpipingwithinthesetrenchesforsusceptibilitytoODSCC.Pipingwithinthesetrenches,assummarizedwithinTable4,wasidentifiedbyinspectionofplantlayoutdrawings.Ofinterestforthisreviewwerelineswithasafetyrelatedfunctionthatareconstructedofstainlesssteel.Table4:SummaryofPipingContainedWithinECCSPipeTrenchPipingLocatedin,th',EastlWestECCS.'Pipe',Trench,':'l",.'lNorthSideSouthSideLineNumberCLI-20"-CC-17I-20'-CC-27I-24"-CS-34"-PMW-63"-DWS-143"-FS-556TpeServiceCSSupplLoop8CSReturnLoop8SSRWTToECCSASSPMWtoRABSSDMWfromU-1SSFPlonExtoRWTLineNumberI-20-CC-16I-20-CC-261-24"-CS-2I-3"-CH-9386"-CS-5003"-WM-A29CLType3CS3CS2SS2SSNSSNSSServiceSupplLoopAReturnLoopARWTToECCSBBAtoRWTSl8CSPumpRecircWMtoCWDischPipingLocatedirithe.North/South-ECCSPipe~Trench".:.-.':,...;.NorthSideSouthSideLineNumberCLTypeServiceLineNumberCLTpeServiceI-20-CC-161-20"-CC-17-20"-CC-2620"-CC-27I-30-CW-78I-30"-CW-792"-DWS-63"-DWS-143-FS-5133"-FS-5564"-PMW-63"-PMW-163"-WM-A293CSSupplLoopA3CSSupplLoop83CSReturnLoopA3CSReturnLoop83CSCCWHx2AInlet3CSCCWHx28InletNSSDMWtoDGBNSSDMWfromU-1NSSRWTtoFPPPumpNSSFPlonExtoRWTNSSPMWtoRABNSSPMWtoRWTNSSWMtoCWDisch.1-24"-CS-2I-24"-CS-3I-30-CW-78I-30"-CW-79l-30"-CW-90I-30"-CW-91I-3"-CH-9386"-CS-500,SSRWTToECCS8SSRWTToECCSACSCCWHx2AinletCSCCWHx28InletCSICWtoCCWHx2ACSICWtoCCWHx28SSBAtoRWTSSSl8CSPumpRecirc.ReviewofTable4indicatestheonlysafetyrelatedlinesconstructedofstainlesssteelaretheECCSSuctionLines(24"-CS-2and24"-CS-3)andlinetosupplyboricacidtotheRWT(3"-CH-938).The3"boricacidsupplylineisconstructedofSchedule10perSA-312Type304.WalkdownofthislineiswarrantedbasedontheinspectionoftheECCSpiping.ApreliminaryvisualinspectionofthispipingbyEngineeringshowsasignificantnumberofcorrosioncellsonthispipeintheECCStunnel.ThisconditionisbeingaddressedbyCR98-1944.Interactionofothernon-safetyrelatedstainlesssteellinesinthetrenchwillalsobeaddressedinthisCR.ReviewofLinesinOtherPlantPiinTrenches:BasedontheidentifieddegradationoftheECCSpipingwithintheECCStrenchesareviewwasmadeofthepipingwithinothertrenchesforsusceptibilitytoODSCC.ThisreviewwillbecompletedasafollowupactivityinCR98-1898. 0 FuturePeriodicFieldlnsections/Walkdowns:PSL-ENG-SEMS-98-102Rev2Page13of15asedonthediscussionsabove,theidentifiedrootcauseisattributedtothepresenceofchloridesthatattachtheoutsidesurfaceofthepiping.Thisiscorroboratedbythefactthattheinspectionsdoneonpipingoutsiderthetrenchthatisexposedtotheatmosphereandrainwaterhadfarfewerindications(removable)thanthepipingwithinthetrench.Rinsingoffthepipingonaregularintervalwouldprovideadditionallifetothepiping.Thisshouldbeaccomplishedbyalightdutypressurewashersuchasa1500PSIunit.Largerunitscanbeused,however,itisintenttonotdisturbanycoatingsonexistingpiping/pipesupports,orstructuralcomponents.Accordingly,aMandatoryPreventativeMaintenance(PM)activitytoperiodicallypressurewashthepipinghasbeeninitiated.TherequesthasbeensubmittedinaccordancewithPlantProcedureAP-0010431andaPMAIinitiatedtoPlanningtoensureissuanceofaPWOandinitiationofplanningactivities.Basedontheevaluationsabove,thefracturemechanicsevaluationsdemonstratethat,withthelowstresses,theidentifiedflawsareacceptableforatleastanothercycle.Theanalysesalsodemonstratethatthepipingwould"leak-before-break"(LBB),therebyprovidingsufficientwarningofcrackpropagationlongbeforeanyimminentfailure.Inordertoensurethevalidityoftheanalysis,periodicmonitoringwillbeimplementedtoinspectthepipingforleakage.ThiswillbeaccomplishedviathePMdiscussedaboveandwillbedonepriortotheperiodiccleaning.ThePMwillbeaccomplishedoncepermonthuntilthepipingiscoated.Basedonwalkdownsofthetrenchandpiping,twoobservationsweremade:firstisthattheworstpittingappearstobeinthemiddlesectionoftheeastwesttrench,andsecondly,withthetrenchmanwaycoveroff,rainwatercollectsonthepavementandflowsintothemanway.Althoughthemanwayisnormallyinplace,itdoesnotprovideawatertightseal.Whenitrains,somewatercouldbeenteringthroughthemanwayandsplashdownoverthevariouspipingsystemswithinthetrench.BasedondiscussionswiththeFPLmetallurgists,thepresenceofchloridesinthewatertogetherwiththelowflow(leakagethroughmanwayonly)couldbedepositingchloridesonthepipingsurfaceaswell.Inordertoeliminatethispotentialsource,oneofhecorrectiveactionsbelowisforservicestoinstalladrippocketunderneaththemanwaywithatygonhoseowntothefloor.Thiswilldirectthewatertothefloorandultimatelytoberemovedbythesumppump.Actionsneedtobeconsideredforlongtermconditionofthepiping.Theactionsmayincluderecoatingand/orpipingreplacement.Inaddition,theremainingweldsintheAtrainpipingshouldbeinspectedduringtheCycle12refuelingoutage.Finallyotherstainlesssteellinesenclosedintrenchesshouldbereviewedforthissamecondition.III.CONCLUSIONThisevaluationdemonstratesthattheSt.LucieUnit2ECCSsuctionlinesarecapableofperformingtheirdesignfunctionconsideringthecorrosionattackidentifiedandrepairedduringtheCycle11refuelingoutage.ThepipinghasbeenevaluatedtomeetitsdesignloadingconsideringcrackgrowthdurationsthroughtheCycle11operatingcycle.IV.PLANTRESTRICTIONSPlantoperationisjustifiedforoneoperatingcycleuntiltheCycle12RefuelingOutage.ThisevaluationwillrequirerevisiontoallowfurtheroperationbeyondtheCycle12RefuelingOutage.I V.ACTIONSREQUIREDPSL-ENG-SEMS-98-102Rev2Page14of15ThesecorrectiveactionshavebeenassignedPMAI'sperCR98-1898:Implementactionstominimizewaterenteringthetrenchandcontactingtheenclosedpiping.ImplementaPMformonthlyinspectionsofCS-2andCS-3inthepipingtrenchforthrough-wallleakageandpressurewashingofthestainlesssteelpipinginthetrench.3.Developalongtermplanforthispiping(i.e.piperecoating,replacement,etc.)Perform100%inspectionofremainingcircumferentialweldswithintheUnit2ATrainECCSsuctionpipinglocatedinthehorizontalrunswithintheEast-WestandNorth-SouthtrenchesduringtheCycle12outage.UpdatethisevaluationtoaddressoperationofSt.LucieUnit2beyondCycle11.Addressothersafetyrelated,stainlesssteellinesinothertrenchesinbothUnit1andUnit2.TheUnit1ECCSpipingshouldbeincludedduringthisreview.VI.REFERENCES1.St.LucieUnit2FSAR,Amendment112.St.LucieUnit2TechnicalSpecifications,Amendment983.REGGuide91-18,Rev1Drawing2998-G-088Sheet2,Rev.29Drawing2998-G-125SheetCS-K-2,Rev.186.Drawing2998-G-125SheetCS-K-3,Rev.217.Drawing2998-G-172,Rev.148.Drawing2998-G-173,Rev.199.CR98-182110.CR98-187711.CR98-187812.CR98-187913.CR98-189714.CR98-189815.CR98-190616.STAR1-96029417.PMAI96-03-24918.CR98-004719.CalculationsPSL-1FSM-98-002,Rev08PSL-2FSM-98-012,Rev020.APTECHEngineeringServicesLetterdatedNovember25,199821.APTECHEngineeringServicesLetterdatedDecember1,199822.APTECHEngineeringServicesLetterdatedApril7,1999 VII.VERFICATIONSUMMARYPSL-ENG-SEMS-98-102Rev2Page15of15ethodofVerificationeSDCSystemDesignBaseswerereviewedtoensurethatthesystemdesignwasproperlyevaluatedgainstapplicableFSAR,NRCRegulatoryGuides,and10CFRPart50requirements.ThePlantTechnicalSpecificationswerereviewedtoensurethatnochangetothePlantTechnicalSpecificationswasrequired.Referencedinputsandguidancedocumentswerereviewedtoensurethattheinformationincorporatedw'asproperlyutilizedanddocumented.Thesafetyclassification(SafetyRelated)hasbeencorrectlychosenandadequatelyaddressedinthisEngineeringEvaluation.ConclusionsAssumptionsrequiredtoassesstheacceptabilityoftheECCSsystemconsideringtheconditionofthepipingwereadequatelydescribedandreasonable.DesigninputswerecorrectlyselectedandincorporatedintheAPTECHcalculationswhichwerethencorrectlytranslatedintotheconclusionsoftheevaluation.DrawingsandmanualsusedinthismodiTicationwerecheckedtoensurethatthelatestrevisionswereutilized.Interfacerequirementsweredemonstratedtobesatisfied.TheevaluationhasbeenproperlydocumentedandcorrectlyconcludesthattheECCSsystemwillcontinuetomeetitsdesignrequirementsasaresultofthisconditionandnochangetotheTechnicalSpecificationsisrequired.heconclusionsprovidedbythisevaluationarereasonablewhencomparedtotheinputs.Theacceptanceriteriaforthedesignwasadequatelydocumentedtoallowverificationthatthedesignrequirementshavebeensatisfactorilyaccomplished.VIII.ATTACHMENTS1.APTECHEngineeringServicesLetterdatedNovember25,1998,PreliminaryFlawEvaluationofCorrosionDegradationofECCSuctionPipinginSt.LucieUnit2,rev.0.2.StressAnalysisreviewofmaximumstressesforCS-2andCS-3withinthetrench,rev.1.3.SketchesofECCSpiping,inspectedweldsandpipinginthetrench,rev.0.4.APTECHEngineeringServicesLetterdatedApril7,1999EvaluationofCorrosionDegradationof24"ECCSPipingatSt.LucieUnit2,rev.2. tSAPPLIEDTECHNPl.QGYPsL-Eo~-Mn~-98-l<<R,ci4ovember25.l99SPyIoc:PFlondaPowerEL)ihtCompan>St.LuciePlant6501S.OceanDriveJensenBeach,Floridai4957Attention:iblr.4itike4!oran
DearSir:
RE:Pre.iminaryFlawEvaluationorCorrosionDe~radatio:ofECCSSuctionPipinginSt.Lucie.tJni:2~Vehavecompletedapreliminaryanalysisnfthcstrt(c(uralcapacityotthe24-inchsuctionpipingcontainingoutsidesurfacecorrosion.Thcanalysisconservativelyassinesthccorrosioniscon)prisedofpittingandcrackingwiththeprimarycrackingnechn:91nbein@.stresscorrosioncracking(SCC).Bothcircumferenti'landaxialflaworientationswereevaluated.Aleak-before-breakapproachwasusedtoestablishthelargestacceptableflawlcng;hf'rthpipe.Ana!ysismethodsinASMESectionXIunderParagraphl4'8-~640andAppc:IdixCwereusedtocomoutethcallovablethrouoh-wallflawlengthsandpredictedfiawgrovaha>>afunctionOIoperatingtime.GrowthbySCCandfatiguemechanismswascon>>idercdinthefiaw6owthasscsstrlcnt.P3P}IKEORMAT30iMThepipingis24-inchnominalpipesize,Schedt)lcl0whreD=2"inchesandavailthickness,t=0.25inch.Thepipemateria}isType30"stainlesss'eel.Thede>>inconditionsare:p=60ps)gT."100!Thepipin~systemisdesignedtoASMESec:ion3II,Class2.APTECHENGINEERINGSERVICES,INC,1282REAhllVOODAVENuE1'sUNNYvALE>'AUFORNIA94089(408)745.7000:FAX(408)73"04451'.MAIL;:ptec!isuSix.nelcom.coii1HOUSON,iX((713)S."-00'lrrSBUFGH,PAL(412)siC88:."CALANAGA~j(770)78;.37:-;BErHL.EH"-l.LpA~(8'l0)888-7&7)'IcHARLGlE,Nc(01)8854318-':rN=(.q,,9:,a;<<-pIHINGTQN.DC~(301)888-1".o~~c'~~J~J FloridaPower8'ightNovember25,l993Page2P7L-E'g&-S-795-V-l02.Rilog,lK<VoPg.z,oV3PIPINGSTRESSESThcmaximummembraneandbed'bndingstressesfortneltneinareasaf}'ectedbycorosion~~~de@adationwerecompiledbyFloridaPower8.'tght(FPL)asdncun]cntedinCalculationsPSL-lFSWf-98-002and2FSM-9S-012.Thesestressesarc:PDIVOBEDBETHERli95psi3056psi3022psl3900psln!t40psiChcsestresscomponentsyieldthefollowinzserviceloadingconditionsuseintl;eSt~revefociformal/UosetEmereqpcv!/'solacedl4-".060736962PcSS403NCOTheprimarymembranestress(Pm)isbasedondesignprcssure.Theprimarybendingstressisthcsumof'eadweight(DN)andseismic(Oi3EorDBE).Theexpansionstress(e)isbasedonthermalandSAMloads,Forevaluatingaxialflaws,thehoopstressisrequired.ThehoopstressiscalculatedastwicePmor2880psi.ALLO'BUYABLEFLA~VLD'GTHTheallowablethrough-wallflawsizewasde;ermired"ornorm;l/upsetco~"'on-wi'n-.X~tSectionXlCodesafetyfactorof2.77forcircumferentialllawsandi.0I'oraxialflaws.Theflowstressfort'repipematerialwsassumedtobe4".2}si.Theallowablecircumferentialflawlenyhiscomputedtobcapprox'mately26inches.Foraxialorientedcracks,theallowablethrouoh-wallflawIcn"thi'12'.,8'sanutince>>.Bothof'thesestructurallimitsaremuchgreaterthanthesurfaceindicationsobserveddurin~inandrepairof'aftectedpiping.tnsoserveur>n~inspection~~~~~ FloridaPower8:Liehtnovember25,I993Page~f'SL-CH&-sE~sgg>>Rli<.lRcv.03o$aFLA~tt'ROV,'THANALYSISThegros,qhofsuracef'v,flcv'5willbelimitedtotn<eweldareasvherclocalr-'dl~pipexteriorisrecoatedtopreventfurhcrenvironmeiital.'tack,thepotentialforfurhe.SCCwillbcsignit"-atiy'-'.Il,fl~'<<cniyreuceo.Ilowever,afla.vgrowthevauationv'aspe<ormcdassurnin<<SCCwillbeoperativeandflawscouldcontin"etopropa"=atef<o<<ma<<'xisti."~n<y.-.>esurtacindicationslpittin<<.Basedonaninitialtl-wl.2*<<sumcdt<<rough-wal!,theserviceperiodrequiredtogrowtotheallow'ablesizeexceeds'ars.i,'i'years.Initialflawlengthsclosertothemaximumobservedsurtace(i.e..=.>5inches)v:ouldhaveanacc~tableo~cratlonalpcrioo't~earst'i.~~<<<in<<pcrlo0<aout2years.Itisexpectedthatlor<gdeeptlawsw'llbedetectedbyevidenceofboratcdwaterleakagebecomingvisiblefromthepipe.Std&IARYA~DCOVCLUSIOUSApreliminarycalculationdivascompletedtodctcrrnir<etheacc)tablesizeofsurfaceindicationsbasedonaleak-before-breakstrate~'.AS~f2<-'Il.ectionXIllawevaluationmethodsandacceptanc.crite.iawereused.Forthes:resscsprovidedbyFPLathrou~'h-waawof26inchesvould'dsatisfythemiiiimums-e'.yfactors.Acorservativetlawgrowthevaluationindicatesthatadequatesafetymarginsu:illbemaintainedl'oratlcas:onecycleofoperation.1tisconcludedthatth-stoic'-l'f'diut<olalldesignlo;--:perASWlESectionXIpl'ovidedthat'ea'tctivie.tnat'eaoetcctionismaintainedintheareasatrectedbycorrosiondmaraca:ionThisevaluationiscurr<entlybeingdocumcntcd(chckd-d-"dearvritied)inaformlcalculationunderourQualityAssuranceProerain.1fuh!yosou!dhavequestionsregardingtheseresults,pleasedonothesitatetocall.Sincerely,0g...gRussellC.CipollaProject5fanau<er~IP~~<~~i<'.v7",6'"'" PreparedBy:~~v-~VerifiedBy:MAXIMUMSTRESSES(NOTINTENSIFIED)FORSIPIPINGINTHEPIPETUNNELAREAA8'cBTRAINS)1,395PSI2,704PSIPRESSUREDEADWEIGHT(D1,580PSIOBEINERTIAOBE1,618PSIDBEINERTIA(DBE2,026PSIP+DWSTRESSCOMBINATIONSP+DW+OBEP+DW+DBE4,099PSI5,717PSI6,125PSI1,580PSI
References:
1)StressCalculation2412,Run2,Rev.8(Train"A")2)StressIsometricSI-199-74,Rev.8g'rain"A")3)StressCalculationSI-2407AC,Rev.0(Train"B")4)StressIsometricSI-19941,Rev.8(Train"B") RNT2f.L.21'RENCl.lOPENiNGPrrg+()rrrLQ..~rr~~rrr~rr~1%4r)C'L~r~go~~rr8(QrWg>>Cr+)C'r~\rr~,s.AFFECTEDAREAF'IGUREtECCSSUCTlONPlPlNG +4~g4~i-'Q(ooo4ppooC'CZ-JCuO4v7v<L%$+JC'%JvJllyr4opop44popooppre~QXZ~J~lvl~+INspccfcnlvcLn50<onicnlIccnsFIGURE2ECCSSUCTIONPIPINGINTRENCH0$ÃP18 t=!GUREECCSSUCTIONPIPINGBTRAlNSTRAlGHTPlPFltl~p~l-7~>~~ Is'APPLIEDTECHNOLOGY'IMr.CarlBibleFloridaPower8t'ightCompanySt.LuciePlant6501S.OceanDriveJensenBeach,FL34957April7,1999Psi-EZ(-S,&AS,-'t8-IONATTACHMENTREV.pgoploF~3Attention:Mr.MkeMoranRE:EvaluationofCorrosionDegradationof24-InchECCSPipingatSt.Lucie,Unit2(Ref.FPLP.O.00034916,Rev.4)(APZECHProjectAES98113566-1Q,Rev.1)
DearSir:
WehavecompletedRevision1toCalculationAES-C-3566-1regardingtheflawevaluationfortheECCSsupplypipingatSt.Lucie,Unit2.Thecalculationwasrevisedtoincorporatenewmaximumstressesforthemodifiedpipingsupportarrangement.Enclosedisacontrolledcopyofthefinalcalculationthatdocumentstherevisedevaluation.Insummary,aQawevaluationwasperformedtoASMESectionXI,AppendixC,methodsandacceptancecriteria,.Theallowablethrough-wallQawlengthsandestimatedQawgrowthduringservicewerecomputed.%heconservativeQawgrowthanalysisindicatesthatadequatesafetymarginswillbemamtaincdforatleastonecycleofoperation.The'tructuralintegrityofthepipingisacceptableforthedesign-basisloadingconditionsbasedonleak-before-break.'Therefore,Codesafetymarginsvrillbemaintainedintheareasaffectedbycorrosiondegradationwhendetectablethrough-wallleakageisexpectedtooccur.'.Ihavealsoenclosedadocumenttransmittalform.Kindlysignandreturntheformtothe'ddressindicatedontheform.RCC/sjhEnclosuresSincerely,I~c'.p~RussellGCipollaProjectManagerAPTECHENGINEERINGSERVICES,INC.1282AEAMWOODAVENUESSUNNYVALEPCALIFORNIA940891C3566C2,DOC(408)745.7000E3FAX(408)7S44445pEMAIL:eptechsuolanetcom.cornHOUSTON,TX0(281)55842000PITTSBURGH,PAP(412)9206633PATLANTA,GA0P70)7814756BETHLEHEM,PAP(610)866.7347PCHARLOTTE,NCP(704)865.6318ieeceiveggime"")pi.y.p.4~pgsHINGTok,Dcp(301)&&4899 f'SL,-t=nh&-5&nS-'i'E-io2CALCULATIONCOVERSHEETATfACHMENTCalculationNo.:AES-C-3566-1QUncontrolledControlledTitle:EvaluationofCorrosionDegradationof24-InchECCSPipingatSt.Lucie,Unit2HoridaPowerEcLightCompanyProjectNo.:AES98113566-1QAPTECHOffice:SunnyvaleSheetNo.DocumentControlNo.:I-2Purpos~:Thepurposeofthiscalculationistodeterminetheallowablethrough-wallflawlengthsandexpectedservicelifeofECCSsupplypipingsubjecttocorrosionontheoutsidesurface.TheallowableQawlengthisbasedontheacceptancecriteriaofASMESectionXI,IWB-3640foralldesignloadingconditions.Assumptions:AssumptionsaregiveninSection2.0.Results:AsummaryofresultsispresentedinSection6.0.Thestructuralintegrityofthepipeisadequateforalldesignloadsunderleak-before-breakconditions.RevisionNo.PreparedByDatellgyBCheckedByDateVortrtodBy'7Af'RApprovedByDater<rpgRevisionDescriptionInitialReleaseUpdatedanalysisforrevised(unintensified)stressinputforSIpipingIRPTNNENGIHEERlhQSERVlCES,tNC.ReceivedTimeApt.7.1:38PMQAN45REV.8196 ~~~~~'~~gIQ~~~I~II~~I~I~I~~~0~0~~~ CalculationVo.:Aos.c~56o.[Title:Eva[ua'ionot'Cot-,osionOcgRadono[I4-[IIchECCSPi[line.atSt.Lucio,Unit".S'I'cbvCI:ccI:cd.IFy:~~(ttcvtI[CIIio.!Oo;cj/ys[>ac.99OocvFocntCnntyo[Yo['ICalCIII;FPL.LProjectYo.:Als0$[[s56o'QSIIcctYZ.:iol'~1.0liiTRODUCTtOYiSurfa-eindicationswerefoundonth"emergentcorecoolingsystem(ECCS)supplypiping(l.".),'ghesu;Lceindicationstveredetecteddurhinspectionandar"teeresultofpittinocracl;ingdu;;osuracecorrosion.Etisbelievedthattheobserv"dpitrinnjcracl<n"occt:rrcdover'.L.":!i.--.",:-".".-)lant.astheinstatedpipinglstheorlgUlalmLaterial.Toemajorityofthcindica:ionswerclocatedintheneighborhoodofweldsandwercprizariiyczcunfcrntiaUyoriented.TheECCSsupplypipingandfittingsarefaoricatedhotnType"=0!st=inlcsssteel.Tlusalloyisknovztobcsusceptibletost.esscorrosioncracking(SCC).Of:thesurfaceindicationsexamined,mostpitting!'cracks'ngwasinthebasemetalnearwclds,bu[.sotnewasobservedatthcweld.Theprozirnitvofcrackstoweidsindicatesthatweldresidualstress'sarecontributingtothccracL'qg.Thepurposeosthiscalculationisto'dctenPzetheallowableflatvlengthsandacceptabl-s."i'ite12ofECCSsupolvpipinFcontin~thouh-wallcracks.AIcal'-bfore-breakapproachisfodtotvedtoverLythattheobservedindicationswillnotsignificantlyaffectpipeintegrityprioroleakdetecrion.Thiscalculationincludesacriticalflawsi=cevaluationtoestablishtheallowabl0=-tvlen<<chfortheaf.'ectedpiping.Thiscalculationalsoincludesaf'[awgrowthanalysisthatquanti.'iesthegrowthrteofcracksovertirrc.Thisgrowtthanaly'.:sisbasedonexpectdcrackpropaationmcchanislwsoffaL[guecrackgrotvth(FCG)andSCC.TheflawevaluationrulesprovidedinAppendsCofAmericanSociet'fiVfechanicalEngineers(ASIA/E)CodeS.ctionXI(~)areusedasguidanceincompletingthiscalculation.psL-Pl&-seals-9'E-lo"-PViACHh'EHlQAE1VR~S/96~~~f~~FI+'~~~~s~-IliI~I~-u ~~~~~~~I~~~~~~I~~~~~I~~Cl~~~0Il~1'~'C~~IS40~I~ISO~~~~~II~~~~0~0~~~~~~~t~0~~lIs~~~~t~~~~4 III~~~~~~~l~~~~~~~~~~4~~~II~~II~~I~I~I~I~~~I~~I~~~~'I\I~~I'I~II~~I~~~-~s~~~I~~~ Qlculntion>0.:A:.S-C-3566-1Madebiti/i/~8CliconFP8:I.Title:FvzluztionofCor;osionDcg~Monof2-"-IncaLCCSPipingztS~Lucic,t:ni;2ChcckcJ'pRcwA!ooNo.:0Doaia)co<Control5'n.:Siic=:so.:6of23Dwo:PEojcoEIO.:C'Wc.f6~gES9f1,1356MaterialPropertiesTncpipingmaterialisSA-353,Class1,Tge304stah!esssteel(-".,5).Thcmechanicalpropertis-troomternperaturcar(6):S=30L~iS=75ksiwhereS,isthespecifiedminimutt1yieldstrengthandSisthespeci-."iedminimumtensilestrength.TheCoderninitt1utnpropertiesforthedesi'emperatureoE300'Fare:S=22.5J'siS=66.0ksiThedeQ11itionfortlowstress(o,)assumedinthelimitloadanalysisistousetheaverageoryieldplusultimatesznatl'.s:G,=(S-:S,)/2Thetefore,atdesigntemperature:a',=(22.S.66.0)/2=~.~wksisL-EH&-sEM5-96-lo2-~or!>BE'J.FACE~OFQAE17REV8'96o~~IBg~~~Ik~I.!3:l;.'!1 QS-6'--S~gATTACHMENTREV.CalculationNo.:AES-C-3566-1\Title:EvaluationofCorrosionDcyadationof24-InchECCSPipingatSt.Lucic,Unit2'adeb:Checkedby.Revision5o.:1DateDoeutncntControlNo.:I-2FP&LProjectNo:.AES98113566-1SheetNo.:7of2334OperatingandAccidentStressesThenormaloperatingstresseswereconservativelytakenasdesignpressure(P)anddeadweight(DW).Themaximumstressforaccidentconditionswastakentoincludedesignbasisearthquake(DBE)loadsP+DW+DBE.ThermalstressesareassumedtobenegligiblebecausethesystemismaintainedbyFP&Latambientconditions.Theaxialpressure(P)stressbypipesizeiscomputedfrom:a=p,D./4twiththestressresultsgivenas:o.=60(24)/4(0.25)=1440psiTheDW,OBE,DBE,andTHER"unintensiQed"stressesweresuppliedbyFP&Lfromdesigncalculationsfor24-inchpiping(11).Themaximumtabulatedunintensifiedstressesare:CodeEuationEq.8Eq.9Eq.9~LoadinP+DWP+DW+OBEP+DW+DBETHERStresssi1,3954,0995,7176,1251,580QAE17REV8/96ReceivedTimeApr.7,1:38PM CalculationNo.:AES-C-3566-1Title:EvaluationofCorrosionDegradationof24-InchECCSPipingatSt.Lucie,Unit2MadebvChcckcdby:RegionNo.:1DateDoctnnentControlNo.:SheetNo:.1-28of23PSL-E~t->tWS-lR-ic,2ATTACHhtiENTREY.FAas3srFCUcnt:FPScLProjectNo.:AES98113566-1Fromthismaximumstresscase,themembrane(P),primarybending(P,),andexpansion(P,)stressesfornormalandupset(N/U),andemergencyandfaulted(E/F)conditionsaredetermined.~StresssiPP,~N1,4404,3221,580~E1,4404,7301,5803.5ResidualStressesLocalresidualstressesatweldareaswillbedominatedbytheweldresidualstressfromfabrication.Localweldresidualstressesaresecondary(displacementcontrolled)stressesthatareself-equilibrating.Therefore,asconstraintisrelaxed,stresseswilltendtoattenuateaway.Peakstressesatsocketwelds(fillets)andbuttweldstypicallyareyieldorderinmagnitude.Stressestransversetoweldsaretypicallylessthanlongitudinalstresses(7).Transversestressesaretheprincipalstressofconcernsincetheyareperpendiculartothecircumferentialplanecontainingthecracks.Useof1/2yieldstrengthforpeaktransverseresidualstresshasbeenrecommendedforfractureanalysisofwelds(7).Sincecracksareobservednearweldmentsandnotoriginatingwithinweldmetal,theuseof1/2yieldstrengthwillbeconservative.Thispeakstressisconservativelyassumedtobeuniformthxoughthethickness.Becausethestresswillattenuateasthrough-wallcracksdevelopandgrowinsignificantlengthwithrespecttothepipecircumference,theresidualstressisassumedtodecayinalinearrelationshipwithcracklengthandpipecircumference.Therefore,thefollowingequationisusedforweldresidualstress:(3-3)whexe,eisthehalfcrackangle.Itis,therefore,assumedthatwhenathrough-wallcrackexistshalf-wayaroundthepipe,only50%oftheoriginalweldresidualstressxexnainsduetorelaxation.QAE17REV8/96ReceivedTimeApr.V.1:38PM @m'acNENGIIIEERINtrSERVICESIICATI'ACHMENTREV.PAGF~OOF~!"alculntioaNo.:AES-C-3566-1M~by:'"'+~/sQieat:FP<itle:EvaluationofCorrosionDegradationof24-InchECCSPipirtgatSt.Lucio,Unit2Checkedby:RevisionNo.:Date:8ProjectNo.:AES9si13566-1DocumentControlNo,:SheetNo.:I-29of234.04.1ALLOWABLEFLAWLENGTHIntroductioaTheallowableQawlengthsfortheECCSsupplypipingwereestablishedbythelimitloadanalysisforQawed(Class1)pipingcontainedinAppendixCofASMESectionXI.Thepipingmaterial,beingausteaiticstainlesssteel,ishighlyductileandnet-sectionplasticbehaviorwillbeexpectedtobecontrolling.Further,crackiagisnotdirectlyassociatedwithweldmetalorisawayfromtheweldzonessothatbasemetalpropeitieswillberelevant.4.2LimitLoadEvaluation-CircumferentialFlawsTheabilityofthepipingtotolerate.through-wallcrackshasbeenevaluatedbasedoaanet-sectionplasticcollapse.ThelimitloadanalysisequationsfromASMESectionXIforthrou'-wallcracks(a/t=1)wereused,Figure1isaschematicillustrationoftheQawmodel,FromASMESectionXI,thecrackangleandappliedstresslevelrequiredtocausetheremainingpipecross-sectiontobecomefullyplasticisgivenby:ZcrfP'-(2siaP-sine)'rtp=-[1-(e/n)-{P/err)](4-1)When(8+P)57c,and2tyfPb=-singrtpP~ITItyt(4-2)QAE17REV8/96ReceivedTimeApr.V.i:38PM I~~I~~~~~I~~~~~~~~~~'I~~I~~~~~~II~I~~~~~~~I~~'III~~I~~II~I~I~~~~~~~~~II~~~~~I~III~I~~~'I~~I~I~~I~~~~~~II~~~I'~~~~'I~~~~I~~ CalculationNo.:AES-C-3566-1all'Ln,4nol6'1eVALJ'~Pgi-EWggP~g'l[Oz.~""'TTACHMENTREV.PAGE1~OFQienttFPALTitle:EvalvationofCorrosionDegradationof24-InchECCSPipingatSt.Lucio,Unit2Checkedby:RevisionNo.:Date:DocutneatControlVo.:1-2ProjeaNo.:ES9S113566-1sbcctNo.:llof23where,o=Pipehoopstress=pD,/2tM,=[1+1.61$/(4Rt)]'~ct,=Howstress=TotalcracklengthSolvingforcracklength,theallowableaxialcracksizeisgivenby:=3..576(Rt)"'-1SF'1/2(4-5)wherethepipehoopstress,ty,is2880psi.TheSFsforacceptingaxialflawsarespecifiedinArticleC-3420ofAppendixCofSectionXLTheQawacceptanceSFsare:SF=3.0SF=15(normal/upsetconditions)(emergency/faultedconditions)4.4ResultsForcircumferentialflaws,thelimitloadequationsweresolvedbytheiterativeprocess.Equation4-3wassatisfiedforthefollowingthrough-mallcracklengths:CrackAnge~em0.43130.5394Length,ij~inch32.1840.25Z,4~0.032540.842220.032540.67236~Ssi43224730ReceivedTimeApt.'t,i:38PhiQAE17REVS/96 CalcttlatioaNo.:AES-C-3566-1Madeb:f'sl-a&t-bcvna-g9lo~ATTACHMENTREV.PAGE13Client:FPRLTitle:EvaluationofCort'oaionDegradationof24-InchECCSPipingatSt.Lucio,Unit2'heckedby:MRevisionÃo.:Date:DocumentControlKo.:I-2ProjectNo.:AES98113566-1SheetNo:.12of23where(=28R(R=meanpiperadius).ThesmallestcomputedcircumferentialflawlengthiscomputedforN/UconditionswithI=32.2inches.Foraxialflaws,theallowableflawlengthiscomputeddirectlyfromEq.4-5.N/UE/FLength,5~inches13.6427.69a~SFaf5.12210.243ThesmallestcomputedaxialflawlengthiscomputedforN/Uconditionswithk=13.6inches.ReceivedTimeApt'.7,1:38PMQAE17REV8/96 ~~~~~~~~I~~~~~~~I~~~~~~~~S~0~~~~~I~)'~~~~I~0I4I~~'~~~.~~0~~~~I~~~I~~~~~~~~ ~8~~~~~~I~~0~~t~~II0~~~~~I.~I~~I~~c~~~I~~~~~~~~I'IeII~~~~~ C~%%\me~~~~~~0~~~~~~~~~I~I'~~~~IoI~~S~s~'~~~Ii~~\lE~~~~~~~~~.'~II~~~00~~ N@YMMEttQNEMHQSHKCES.tNc.CalculationNo.:AES-C-3566-1Title:EvaluationofCorrosionDegradationof24-InchECCSPipingatSt.Lucie,Unit2Madey:Chccttcdby:RevisionNo.:1'ccppealDateCbcnt:FP&LFrojectNo.:AES98113566-1DocumentCorttrolNo.:SheetNo:,1-216of23VS1-eWC-S~S-33-lo~ATIACHMENTREV.PAGf'I+OP~XFromthisinformation,areasonablebutconservativeboundwasestablishedas$,=0.62inchbasedona95%probabilityofoccurrencelevelat95%coaQdeace(seeAppendixA).Likewise,aworstcaseinitialQawlengthwasdeterminedfromthe95%/95%probabilityofthemaximumobservedindicationlengthsfromeachinspectionlocation.Forthiscase,/j;=1.18inches.Therefore,twocaseswereevaluated,aslistedbelow:Case1Case2InitialLength,2a;~inch0.621.18FinalLength,2at~inch32.232.25.5AnalysisResultsThecrackgrowthanalysiswasperformedinaniterativeprocessfollowingEq.5-1.InsolvingEq.5-1,theincrementsingrowthwerecomputedfromEqs.5-2and5-3foreachgrowthmechanismwhereaada=-ZNFCGAnincrementintimeof20dayswasassumed,sothatN=2'yclesandt=480hoursinthesummation.Foreachincrement,anewvalueofKwascomputedfromEqs.5-4and5-5,asthecracklengthwasupdatedforeachincrementofgrowth.Theanalysisresultsaresummarized.inAppendixB.TheresultsfromthisanalysisareplottedinFigure3.Theseresultsshowthechangeinflawlengthasafunctionofservicetime.Byreplottingthelawgrowthasafunctionofinitiallawlength($,.),theremainingservicetimeforagiveninitialthrough-walllengthcanbedetermined.ThisplotisgiveninFigure4.QAE17REV8/9GReceivedTimeAPI,7.1:38PM ENGINEERNQSERVICES.HC.Y'hL-Cdte-4BVl5ATTACMjwaENTRB'.PAGE1803CalculationNo.:AES-C-3566-1Title:EvaluationofCorrosionDegradationof24-InchECCSPipingatSt.l.ttcie,Unit2Madeby:Chcckcdby:RevisionVo.:Detc:DocumentControlNo.:1-2Qicat:FPALProjectYo:.AES98113566-1ShcctYo.:17of23Foraninitiallawlengthof0.62inch(Case1),theacceptableoperationaltimeisabout2,630days,or7.2years.TheCase1'analysisisforaflawlengththatrepresentsthe95%/95%boundtotheobservedsurfaceflawindicationlengthsandisconservativelyassumedtobethrough-mall.Fortheworstcaselawlength(Case2),takenasthe95%boundtothe.maximumrejectedflaws,where<;=1.18inches,theacceptableservicetimeisabout5.4years.Finally,thelongestlawthatcouldgrowtotheallowablesizeinoneoperationalcycle(1.5years)wasdetermined.FromFigure4,thisflawlengthis6Ainches.Itisexpectedthatinitialflawslengthswillbedetectedbyevidenceofboratedwaterleakagebecomingvisible.~QAE17REV8/96ReceivedTimeApr,7.1:38PM mIPVMHENolHEERMSERVICES,IhC.P51-EW(-St:yvlS-'tK-lp2ATTACHihtiENTREV.PAGE~~OFCalculationNo.:ABS-C-3566-1Titie:EvaluationofCorrosionDeyadationof?A-InchECCSPipingatSt.Lucie,Unit2Madeb.Chcckcdby:RmsiottNo.:1""'+/~vDate:-1A-emDocumentControlNo.:1-2ClicnttFPScLProjcotNo.:AES98113566-1ShcctNo.:18of236.0SUMMARYOFRESULTSAfiawevaluationfortheECCSsupplypipinghasbeencompletedfoHowingthegeneralmethodsandacceptancecriteriaofIWB-3640andAppendixCofASMESectionXI,Aleak-before-breakapproachhasbeenusedtoassessacceptablelimitsonthrou+-wallflawsizesandacceptableservicetimefortheaffectedpiping.Theallowableflawlengthforpostulatedthrough-wallcrackshasbeenestablishedas32.2inchesforcircumferentialflawsand13.6inchesforaxialflaws.Theseallowableflawlengthsaresignificantlylargerthantheobservedsurfaceindications.AQawgrowthanalysiswasperformedforcircumferentialfiaws.ThecircumferentialflaworientationwillbelimitingbecausebendingandresidualstresswillbecontrollingforSCCatcircumferentialwelds.Thesestressesarenotgloballypresentforaxialflaws.Forareasonablebutconservativeinitialflawlengthof0.62inch,theacceptableservicetimeforthepipingis7,2years.IfaworstcaseQawlengthof1.18inchesisassumed,theacceptableservicetimeis5.4years.Thelongestthrough-wallQawthatcouldgrowtotheallowablesizein1.5years(oneoperationalcycle)iscomputedtobe6.4inches.Therefore,theresultsindicatethatadequatesafetymarginswillbemaintainedforatleastoneoperationalcycle,ThestructuralintegrityofthepipingisadequateforalldesignloadsperASMESectionXI,providedthatleakdetectionismaintainedintheareasaffectedbyexternalcorrosiondegradation.QAE17REV8/96ReceivedTimeApt.7.i:38I'M Pcl-hHtn-bevtS-1K-10~ENGINEEfcHttSERYlcea.INC.ATlACHhiENTREV.PAGEZOOF~+CalculationNo.:AES-C-3566-1Tjtle:EvaluationofCorrosionDegradationof24-InchECCSPipingatSt.Lucie,Unit2lvhdby;Checlccdby;RevisionNo.:1DocutncntControlNo.:1-2CUent:FPZcLProjectNo.tAES98113566-1Shect;Vo;t19of237.01.InspectionSummaryData,FloridaPower&LightCompany(ECD<).2.Unit2ECCSInspectionData,FloridaPower&LightCompany(ECD-5).3.ASMEBoilerandPressureVesselCode,SectionXI,AppendixC,"EvaluationofHawsinAusteniticPiping,"1989Edition.CalculationPSL-2FSM-98-012,Rev.0,"MinPipeWallCalculationfor24"CS-2RWSTSuctiontoCSPumpsQCS-2-3-SW-1,CS-Z-FW-3,CS-Z-FW-901,"FloridaPower&LightCompany(November22,1998)(ECD-2).5.CalculationPSL-1FSM-98-002,Rev.0,"MinPipeWallCalculationfor24"CS-2andCS-3intheOutsidePipeTunnelperCR-98-0047,"FloridaPower&LightCompany(February9,1998)(ECD-3).6.ASMEBoilerandPressureVesselCode,SectionIII,"Appendices,"Division1,1989Edition.7."RequirementsandGuidelinesforEvaluatingComponentSupportMaterialsUnderUnresolvedSafetyIssueA-12,"EPRINP-3528,AppendixIV,Figure8-5,ElectricPowerResearchInstitute(June1984).8."EvaluationofFlawsinAusteniticSteelPiping,"EPRINP-4690-SR,SpecialReport,ElectricPowerResearchInstitute(July1986).9.NUREG-0313,"TechnicalReportonMaterialSelectionandProcessingGuidelinesforBWRCoolantPressureBoundaryPiping,"Revision2,USNuclearRegulatoryCommission(June1986).10."DuctileFractureHandbook,"EPRINP-6301-D,Volume1,ElectricPowerResearchInstitute(June1989).11.RevisedStressResultsforSIPipinginPipeTunnel(A&BTrains),FloridaPower&LightCompany(April7,1999)(ECD-10).QAE17REV8/96ReceivedTimeApr,V.l:38PM ~+~ERvmsuvcas.Ihc.Calculationiso.:AES-C-3S66-ITitle:EvaluationofCortosionDcyatjationof24-InchI-:CCSPipin"atSt.Lucie,Unit".igsdc':Chccccdhy:~McRcvt:ictt.'vn.:Date(z/i/PgDoctttttcntCootrol.a>0.:I-2Clicttt:ProjectVo.:AES98IIi566-IShcctiitt.:20of23r/2l///Neutralaxis'Figee1-CircumferentialHamivfodel-Net-SectionCollapsehfodel.St-CNe.SrM5-9S-[o2-"OF~3QAEl'7REV8!96'ec.}.10:l5Plt ~~~~~~~~I~~ rat"~~t-~~ms-1Y-lo~ATTACHMENTREV.Z33CalculationNo.:AES-C-3566-1Madeb:v~/~vCUcoc;FP<itle:EvaluationofCorrosionDegradationof24-InchECCSPipingatSt.Lucio,Unit2Checkedby;RcvisiooNo.:Date:projectÃo.;AES98113566-1DocumentControlle.:SheetNo.:I-222of23FLAWGROWTHEL/ALUATIONRESLILTS~'5025ECCSSUPPLYPIPINGt=0.25"201510005001000150020002500500035004000ServiceTime,T[daysjFigure3-FlarvGrowthAnalysisResultsforECCSSupplyPiping.Q~I7REV8/96ReceivedTimeApr.V,1:38PM g;tnttaatttttQ56AcES,at"ATTACHhiENTREV.FAGE+A0F~~CalculationNo.:-AES-C-3566-1Title:EvaluationofCorrosionDegradationof24-InchECCSPipingatSt.Lucie,Unit2M3dcby.Chcckodby:RevisionNo.:1'"'~F/ryDate:DocotncntControlNo.:'-2Giant:PALProjectNo,.AES98113566-1SheetNo.:23of23240022002000m1800l600i-l400El200~l000.-800~~6004002000FLAWGROWTHEVALUATIONRESULTSECCSSUPPLYPIPING0=24"t=0.25"10152025303540InitialFlawLength,Li(inchesjFigure4-RemainingServiceLifeVersusInitialCrackLength.QAE11REv8/96ReceivedTimeAP1,7,1:38PbI
~~~~~~~~~~~~~~~e ~~~~~0~~I,~~~~~~~~~~'IIII~~~II~II~~~~I~I~~~~~~~I5~I'~~I~~~~~I~~~~I~~~~~~~~~III'I~~I~~~I~III~I~~ss~II~~I'~~~~I~~I~~~~I ~~~~~~~~~~IIi~~ ~I~~'~~~~I~~I~I~~I~II~I~II~~II~~II~III~I~II~~II~ ~~~~NIIIII~~I~III~I~I~~IIIII~~~II~~I~~~I~~~I~~I~II~IIII~I~~~~~~~ sr~~~~~~~~~~I~~~~~I~IIII~IIII'II~I~~'~~~II~I~'~II~~I'II~II~~~~~~~II~~ ~~~~~~0~~~~I~4~II~~II~~~~I~~I~~~I~~~I~ V%IV/AOPIICVJv~'Av>~~wvvIv'IvvvyENCWEBtltIEtSERVICES,NCCalculationNo.:AES-C-3566-1Title:EvaluationofCorrosionDegradationof~~~~24-InchECCSPipingatSt.Lucie,Unit2invadeCheckedby:RevisionNo.:1Date:DocumentControliso,'-2Chent:FPkLProject~VoAZS98113566-1QSheetVo.:B-1ofB-6Appendix3SUMMARYOFFLAWGROWTHANALYSISRESULTSReceivedTimeApt,'t.1:38PbIQAE175L8~(sag9g~~par8196ATTACHMENTREV.PAGE3~OF~3 45Hli%RR~l~~i.~~RW5~%KR~HRW~fiick~i11~ttIKsii:II~I,:s.r~)IIggii)gII/II'/IIIgsI~rII~I.'~strIfllgIiIIIItIIIIIIIIII~IIImsmaHm.R11III11II~I'I,IIIIIII~i11'gllllg~s'Ifiickitiis~~l~III1<IIII<II~SI~II~I~s.:igiig~ggiiriQggii<'g~t;1/II't~gglltgNXItiI'I~t~III~t~~II~I~~ttI>IIIIIIIKII<IIEHEQPl~<sggiiigIIiig~~lsI~slI~:fiicki:raggitiQ~i<~ti~tl'I+/IIIII~1<<I~~iII1~I~~~'.IIIIIt~:III1II~IItIIIIme&~@pig;s~/@~i~Q~tfg~tiIIII11II11II11II11III~I~~r'IIIII11III~~II'I~IIrlI~I~IIIIIIIIIIIIIIll~IIIII.II~IIII~'R9IEKI'lkiK~R~<KNREEZi%IiIImIIIi/1I~I~I~~~s~Q~~ ~I~Igllgl~IIIIItIRHHH%KMBIgigaII~III.':I'~I'It~tII~lipsI>.~llI~~~~><~:~<~i/~~>>~>>'KKHX'5XHJRKHXSKHi%%925'KBHKRZSRKEH1KHIXQR~IRX~++iticiIi~I~~gggg~V~ggiiggg~t'fiicki'i~>>iii~~gp@QggQQ~gQ~>~der+~<~I<<rI<la~S>>>:~t~~~i~gfQiiigggj~tlKKma'XK!aamaaamaaKKaEKKamHmaiKKIRKm'KE'~lMQRRE%%EMSE25RKMRBEOKKKIKKBRHX5IKBM3"'"KKK4I~>gllg~III~<I'a~~~I~',';-'.I:,I~III',It~II~~II>I'lggggII~gRgQ~<~><~-'<<~~~~I,II~if.iIr>>>>~~i~l<g~>~tI~+~<I~i.~<lKXSEg~gPQQ~~I~~~//~<ii~iKa'aÃgKggKK~~>i~>>'>>gPgg~~~t.+3Q7g~~l<ig>>>i7gggii~<Q+<~>lI~I+g~<I~'>>'~~gggQ~W~i~~<1~t~>>>>I~I+<pig~<<~I>:~i~~<~t~t~Qig<Ii>~~i:IIIII+lip+QIIIQIII'I~II~~IIII~~.I:~III;II~llIIII~I'IIIllII~it4g[lll~lgIII~III~mKaaKamaaazmaamacmxaamm~"'I.~II~~IglKI~~~ItIIIIIIIIIIII~III~I~'I<~IIIIII~IIII~I~I'IIIIIIII'IllII~ti:~>gfg~tII~I~~I~~IliII~ll'III~III>~III~~IIII~II~I~~~'.ITII~~IiIgggg~II+<~III~~.IIt~<@Ill/Ii~.;i~iIIKB'"~itI~"'~~>~f~>IN'~<giigr~>ggii'igEK>>t"I~<~i:ggggr.+$Qg~~>jigiiiigiig%MMQREZEggKHQ~>>~gPgg~+QI~~WI~IIItgll>lpgaKKKQRML%~<<'>>'>>~~~~i~~~i~i~ttIgggiigmKRlERjgKRLHIK>>>I~>~<>~~~~~~>ggg~iREKRLKaH>i<~lt~>>~~~<~g+~ilggg>~tiIi~iiiIIREZRKKQQNK<<'I~>>~++i~i~~~~~i.I>>IIIIgiigggg~lti~++II+~III'.~i;IIIIIIgllg~l~t'4~~I~~ IIA~mnsmmmmmRSammmmm~lI.gllg~~t.I;~l~..~~~tI11;+IIII~~II~tl~t;~gQllgQQIIQ~~~~+fggII',~tg'III'/II~I~l'~I1+@lipggllQ~lt~~~tI~t.~;I~IIglltt7@g~t'ggIII/II'lip~itI~tgQIIQggiig~C~gglllg~t~:ItI~IIIt~I~I.~~IIglllg~t~C~ll+gQIIg+giigtIKKEZRKEHL%%ERSIKK%%EE5RKHSjKKHRKHEQRRRR'-'>>LKERKRHfiickgii(QI+gQiiiigggiiig~I~~~~~iIII<<~igigot'i~igiig~il~giiggQiiQ~iiIgQgg~i:~iiiIIIiii~+t~tgigICIIIIII+t~gllggglllg~l+gggIgPQIJQI~I;IIII;IIiI'I~I~It~~t~I~IIII~~~~'tIIII'gQIlg~~~t~llI'III~~t~tl~I;giil~lgII~I~~IQggall+ggiitgggiig~~ICIggggI:gg~t,IIII:~giig~i~gQiigggiig~~~ggggrrggfggg~t.Igg)~>>I'I~~/SH!%KRM%592%%BHLRDM~SE!2%KIKi5%52552RKSR59gRK%KHEKS~g~~t~Qgllg~t'~IIgQQIQgj~tgiltI28I~tgll'g~~l~tttI'giigtgggg.~I~~~/~IIIIgQ~;/~~~I,ggiig~t..~tII.~tgggg~IIIIIIggg@g~tgll~g~~~I+giig~t~,~,~~IIII~~'I~',IIPKBREZi%RK9%KKQKR%KKERRK%'RRHQCK~-8~II~I~IN~KKRKRRERRSKiK'XRHMMZRKKK~~~Ii.~gggQiiig~tt..~i;~IIIi.~ti~t~~ggggI.~~t.IIIIItgQllgPQIIQ~QQIIg~~I~~~I~~.'.'IIRKWKKMII~CI/littgII+Qiig~ItI~IIIIIIfiicki+QiiQggiig~~~C;.gggg~:~I.iIgiQI~~tgiitigICiIII~lt\Q+l~ll~tf~l+QIIQ~~l~~ggggQ'I~tt~I~ipigi~ttQQiiig~t~~t~t~~tggi]i~Iti.~t~IgingI~IIQjii~g~~.ggQ~II~ggiig@g~t~iii~~IQQgggQggiiQ~iR5%m'88mRKREZBBREZCEEKRIEEBEIRKBR~MKQBRBRBKxBRRKBRRR8~~t~I~IQggQggll~ggjglllg~~~gggQ~~tl/~ItI~tt~IIgiig~~~iI.IgIIQI~~~I~I:~l~~.~:,~~III:I~l;'CI~iII/II@'glllg~tC'+fgtg~t'III'K828%5Q~tgiiigII~t~ta;~~~.'gpss~>>I19~I1HE52HN~,
~~~~~~~~g85~~~K'ABIDE%RR%~&zH~~~~~EiB!lÃRRBRS55RHER~REKAKKK%%KZZKKEiESEKiHKKE4KKQKKZlKK%~:CIHKEl'KKHRElHRRHKNRKHKHLHKHNRExwKKERRRzIRKMRE~scRH~'K%2%KB2$%KXHKKSRKRiÃKXHRKGESKEMKE~ICEHKQKEHZ%"RXHEl%KEQRHK%RMRRKHRRKESK56TNRHKQKKI5'EHXf%"RKKfEX~SKOSHRKZENRKGE1RZERRXEWRKEWRGEQRHKQKKHR'-CGI~~REKRRHERRRKQRKESRHRKK'ZRRKRHENRKHSRMKKQKELQHX~B:E2MKHBggii@~t~~t~il~~~i~i.~t..~i~ggiigI.iiI+gg$gggQii<gg~v~i.ggi'i'g~~wxttwg7g+giggag@Igg@I~t.+pi'iQ~+jgiig~i'>>~/~i~i'giitg'g+g+gQgiig~~+5gg'tir~I.~tiiI~:~gQggg.~giigQiiigiggggggggg~;i~tr.ggiQ;.t.IiIt+gal:'Igggg~~lggllQI~~It+Qgg~',I.gggggII~~IIIIJ'A~+~~~II~l'~+PggI~~I~.:IIIII~.;gggllg~l+Qllg~~i~itI~~~~.~TIIlg'.~IIII~~~1.KEBRRKKRRKKSRMRRKH%EEWKK21EHK%KKOKBMRQKXR'EKHEXKD~i~itI~i:I~+Q/g~t.:~~/~i~>.,IiI<<.Q@CgI/gpss~~~~~.~I~it~tg,;I>>EI~azzmammammrmmauzamzaaxzaaxzxaxzamrmaxaxmasmXHESKBKRKKZRKEEWKKKRKEKSKKKR:KHiRKXKXHCXZHK%'~i~gg~ttggiig+giig~I~gVQiig.i~~~II/~itgiiSXKRRKKRKBWRKKRKEBZI':KEKSRERHlI~t~lggllggQIIQ~I~ti~ggiigggiiig+gggI'I~~itlIIIIIIIIIII;.II'~~I~I'ltIIjQglllglgllg~I~I~I:;~IIII'I'I~IQgllg~~l~tg+gg'lIIII~'gg+gggiiggjgiig~~~l.I..~t.~I..>>II~SggQ~II~~/IQgl'IQ~~~I.'t~I\'III'Qg/+~II~gjglll'g+gltlg~~gQ/gI'.'III'~~+@II/~i~Igfg~lIIII.~~~IRKEB~%EEIREMKKKRREHQKGKIEXKWREZMlI~.REPESKK+H'HERRH2iSRKBRE2%KRMREKSKEEWKKQRKEQKKKRERHK4'EEK%~lgfgQ'~~tgggg~ii~t;'I~giigIIII+~it~itIIi~.~~~II....~.Pg~lgItlI~i~~i~~'.i~ggii'~tiI~~~~~~I;.';'~~I~III~IIQltggggfglHHRRKH%'KHHRKBRBKR~>>IREKSCEKBKKHHRXBSiXK%%RPKKKI:.%5HHiEEEHKKE552KSREKIEKKKSKKHKKERt&2HNI:'RZHP%~KK24RHP1REEl~~LK2%CKKlKKQKKHRKKHRHCKhKQIREEKSKKRZRKBZIRHEH~KEHSREESKEHtHKIKRRRRXZXERREHXQRKHKKXEE?5~~~t U~SO%~$1~~1$~II%~fi:'KHBRERÃ~mmKIK%55EXESREESSEXBBKK~~@SERB%RRKSRKZNKH2kHSKKSRKKlKIKESK525~KKQKKH~RKEMRIKKXQ~RKzBRRKlHMRiHRKHERKSXRRBZQKSERR~KHEEKRHRRKESLRKRK'XRSRKHXHKKKZRKKIH%RKRKEHKKHKRiEHKRKE%EKZHKHZ%%%BR~KKHlK'KQHHXHKREH%%%~KKRKRKIKXHXQSHiEKRKQKKBKEHRKKERCKEQK'KZRKEHRKH~KEZX?IKERIEEXRKKIKX'HHRR26%RKHHRRZSiKiSSKH%RHRtRXESKHXXKZHRBKSKK!BQKKQ.'E~RKEK%53MXiiiRKKZEKK2&RKQEKHHNHERE'XE4%6XRKKHlRHEHRBEHKBKH'KRZSKKGMKXER2%RHRSM2KR~RRKHRKKRKKRRKQRKEKHRHHIHKElSXKK35E2XLlKK~KEZHRKKHMEKE%gEgEEEBEB2IEXERKIBSKBlRK82EIREH3R~EBBESKKKDgggg...~~~iggiig~~i.~ii.~i~ii~KBHlKH2%RKXSKRRRKHESKZkHK'22%~RZEEQKK~HCHZKH'KEKkKEIEQKR~KKHBKRRHSRBXSSKR9'RESRXKREKHKHRBIEMEKX'ZlEEHRKKEX.iggii~gQiggKIgiiim~i;~~~i~~~>~RKRKK2GRRZKRREKEQRBHI'EMKHESKQMKHKRREKQ':.KICKER&ZKRaZmRmaaaHRmRE!maKHHKKmmHQRKBRKR2%HHZIKEGmlmmmKKEmaEKRHKKIKam~RE2%HHER'R&RKHERKKG%%EKHSNHER~KK2452KHSBIXHK82KRKKHKRRKRBRKHZR%!RRCXZHRBKlIRHHRiKRSHKRREKSHXHRKXE2lRKRRIMKHKKEl:CKEH&KKZIKRE9%KKHKEZRKEEfRKHENRKRSKKQREBRKK2%KKRlCEElKHHMKKAHNE!24KMMLKMKXEKSKKKEQKKZHRK'Z%'.RXGRREEQKZEKIKHKINEK!lKEK~'EHKQKEZHiggggII~i~i~gllg~+g~i~ii~ii.~gggKKBB:'::KERRRXHSRHHH%EHBKX2KINERXBCRQX?lKKGiÃKKLEK%'::KHEQRZK%.RZBRKHERQRZ2%KXM%K2BCHHK%lKiMRKEEHHIK'IEEHKIKKERR%22RKKM%2KIIKRK?RREKRKKRHKK3NXEQ'%SHED'HERN~igglllXgg7llllgi~1.'~I~'igalimrnaFiHR8smmmpPamxasrxmaamuamaR8BiH~FmÃsiiKKHBKEKKHXSKMREESKKEQHHXl%EBQKEGSRZRH'HKB'KBHLEEEEXKK~jHKQEHHERRIXKKRSKXHSHEQRHHRSHEHIIKKKBRZIHHKEHXZIRKESRBEBRKPE%5MRREEBKEKRRHEiQKEEKiQKXBCKMK'Xi@EEXHiRED&KKRRKXEQKKHHRQKQRHHRSZHHHEEIKMHRHHHREiEQKE3XHKZHB52EEEXKKZERSEKREHKElKXHSKEREREHMKHKKQKKHREH~RUHHXRHXRKXiiHEKKRRKES~RKHKXHRRKHSHHHl~EHKHHRMlREXH':'ZHGRKRKlKH28IKMRKEENKKKSREKQRZKIRKHHKZGliHKSRHKKQ~RBXIXQRKHXH'KEUKIH62EQKH?HKIKPXRKKSRKHHKZGIK'BBKKE18RHH'CHKIRXHXRIKKRX'HEE22EXKEHHQiKMRHGESKKHHRKHHK22RRCHEEQKEKREHXH'SMRKEKHCHHHIRKZZEKE26GHZHRHIHRKHHIRHiHKHmlKKKRRHHQEi2EEH':.RkKH1'K9HHIER2EMCR2iBCKMKE2MLKHBCKEHRKRHIKXHRNRKERKEKHKHXBIIHREl'CEHXSKHKSRKIHHKK'REKPQKH2iKIEHEBRREEIEZHBIRHKHHHEHBREXIGEKZHRKXiQRK?HHlkiHBKIK'ZHHHXEBH~\ St.LucieUnit2DocketNo.50-389L-99-90EnclosureAttaclunent2C.~30calendardaysD.gOtherCONDITIONREPORTDUE:DateCRNO.PTNOPSLtKJBQPAGE1OF0COr/I)..SYSTEM¹/NAMEUNIT0~COMPONENTNAMEECC,5&C77()~gfyg5DISCOVERYDATF/TIMEC'OCRORIGINATOR~EYENTDATBTIME~I~'7///IIr/DEPT/PHONE~~<(L0)-z2.(ATTACHADDmONALPAGESASNECESSARY)(A)CONDAIONDESCRIPTIONMO~TL('L'75p@ImSPt=<PDs@(I/Qt~<(Of/IcLD/etc/Lc.'IbrEFsr5~r=mAsITIVE-mmer=itb.onC5"ggGCC,55L/I-TlC)~ILI(&i)~KA~M(.5-2.PgC(4/IpVCTL0~4W)IPP.(B)CAUSEg&QNo~4(C)IMMEDIATEACRONSTAKEN7+I~~PSC>I5I+I~QI)+/rc(Tt/LpLE(D)RECOMMENDEDACTIONSISUGGESTEDASSIGNEEEVE/Ot~~~/('OgI('W/P7'gt-ftC~OHK0I-zGCC0(E)ADDITIONALREFERENCES(PWONumber(s).ProcedureNumber(s).PersortsCo/NecterLetc)3.ORIGINATORREQUESTSCOPYOFCLOSEDCONDITIONREPRTSUPERVISORNOTIFICATION:5'Fry<YESQN/A4.OPERABILITY/REPORTABILITYDETERMINATION:AOPERABIUTYASSESSMENT'EQUIRED(3WORKDAYS)QB.POTENTIALLYREPORTABLE(ATTACHENSWORKSHEET.IFUSED)Q~NOOPERABIUTYCONCERN/NOTREPORTABLED.OTHEROUTAGERELATED7~YESMODEHOLD?QYES~NOFORENIRYINTOMODECOMMENTS:NPSNPNEPRINTSIGMAEDATEtTIMEf47)~l535.CONDmONREPORTASSIGNEDTO;COMMENTS:CIROOTCAUSEANALYSISPGM/VPNEINVESTIGATE&CORRECTDATEr~~C,'~IJT)to:-~~>crDsroOoD(9z(LLULUz8LUELLUODz(0ILI(LD.LUO)Formsss3(Dort.stocked)CA'SAAECAAECCAOSV/HENCLOSEO.PLEASEENSIIAESLLAESPCNSESANOATTACHMENTSAAELEQ2LEREV:422/98
CONDITlONREPORT¹PAGE2OF6.NONCONFORMANCE(NCR):ElYESFUNCTIONALFAILURE:Q,YESCINOCINOBY:PRINTGNATURE7.INVESllGAlloN:ANALYSIS.CORRECTIVEACTIONS,GENERICIMPUCATIONS.DISPOSITiONDETAILS,WORKINSTRUCTIONS(ATTACHAODmloNA.PAGESASNECESSARY)5<<<sYrcCr//rtp"Voprogrl,)/rr5rgmpAWArversa&ru3/C~plgbC.9I-//8rrV.I.&SDSc&o*huA"CHIC.gupyT"h)99FRry~~,Ffrg>>,,9(/yljr~w,CAUSECODES:I)2)3)8.DOCUMENTATIONINITIATED:0N/APWORPCMOTHEREVALUATIONREOUIREDFOR:EO10CFR50.5910CFR21~ASMESECTIONXIGYESCINO0YESCINOCIYES0NOYESNO9.NCRDISPOSmON:QN/AQREWORKQREPAIRUSEAS.IS~OTHER10.DISFOSmONSIGNATURES:('/Ai!notappEcablo)PREPARERSIGNATUREDEPTPIIONEOTHERDEPT.HEADCONCUR'ATEDATEANII/SECXIREVIEWERPNSC/FRGREVIEW?PYESDEPARTMENTHEADPRINTPRINTPNOSIGNATURESIGNATURESIGNATUREDATDATE11.OLosEDUT/PRoeLEMsUMMARY:EYENTINmATolLMODERESTRICTIONRELEASED:QYESQN/APRINTSIGNATUREDAQYESQNo12.FRG/PNSCREVIEW(ifrequiredinBlock10)MTG¹CHAIRMANDATE13.APPROVALPGMIVPNE/MGRDATEulcczto>42Form8483(Non-slocket0CITaAREOARECORDSWHENCLOSED.PLEASEENSUREALLRESPONSESANDATTACNMENTSARELEGI8LE.REV:4I22S8 CR99B0445Attachment1Page1of4INTERIMENGINEERINGDISPOSITION:Backround/EventDescrition:CR99-0445concernsthroughwallleaksonbothUnit2EmergencyCoreCoolingSystem(ECCS)TrainslocatedwithintheRefuelingWaterStorageTank(RWT)trenchasindicatedintheattachedsketch(Attachment3).Theleakratesareextremelysmallandnotquantifiable;theywerediscoveredbythepresenceofasmallmoundofboricacidcrystalsonthepipe.TheunitiscurrentlyperformingadownpowerinaccordancewithTS3.0.3.~DiBThesubjectRWTsuctionpipingprovidesaflowpathfromtheRWTtotheECCSpumpsforuseduringtheInjectionPhasefollowingaDesignBasisAccident.Thisfunctionissafetyrelatedandisaddressedintheplant'sFSARandTechnicalSpecifications.Accordingly,thisCRisclassifiedassafetyrelated.Asdiscussedin'Unit2FSARSection6.3.2.2.4,theRWTisanatmospherictankcontainingwaterboratedbetween1720and2100ppm.RedundantlinesareprovidedfromasinglenozzleonthetanktoprovidesuctiontotheAandBTrainsofECCSPumpslocatedintheRAB.ThesuctionlinesareroutedtotheRABinabelowgradetrenchwhichisopentotheatmosphere.PerT.S.3.5.2,inModes1,2,and3(withpressurizerpressuregreaterthanorequalto1750psia),twoindependentECCSsubsystemsshallbeOPERABLEwithindependentflowpathscapableoftakingsuctionfromtheRWT.PerT.S.3.5.3,inMode3(withpressurizerpressurelessthan1750psia)andMode4,aminimumofoneECCSsubsystemshallbeOPERABLEwithaflowpathtotheRWT.PerT.S.3.1.2.1,inModes5and6,aminimumofoneboroninjectionflowpathshallbeOPERABLEwhichincludesaflowpathfromtheRWTviaeitherachargingpumporaHPSIpump,meetingtherequirementinT.S.3.1.2.7bifonlytheRWTflowpathisOPERABLE.TheRWTsuctionlinesmustbeabletopassdesignflowatadesignpressureof60psigandadesign-temperatureof300'FtotheECCSpumps,havetheabilitytomaintainthepressureboundaryandtheRABintegrity.OperatingpressuresaredefinedbythecolumnofwaterwithintheRWTtankandoperatingtemperaturesaredefinedbyatmosphericconditions.AsdetailedwithintheTotalEquipmentDatabase(TEDB)andplantdrawings,LinesI-24"-CS-3(TrainA)andI-24"-CS-2(TrainB)areconnectedtoasinglenozzleontheRWTandprovidesuctionfortheECCSsystems.Thepipingdesignpressureis60psigat300'F,withanoperatingpressureof30psigat120'F.Thepipeis24"schedule10(wallthicknessof0.250")inaccordancewithEbascoPipeCodeSS-5.LinesI-24"-CS-2and-3aredesignedinaccordancewithASMESectionIII,Class2requirementsandareconstructedofASTMA-358,Class1,Type304stainlesssteelmaterial.Unit2iscurrentlyintheSecondTenYearIn-ServiceInspection(ISI)Interval.ThecodeofrecordforRulesforIn-ServiceInspectioninthisintervalisASMESectionXI1989. CR99-0445Attachment1Page2of4Evaluation/0erabilit:CR99-0445concernsthroughwallleaksonUnit2EmergencyCoreCoolingSystem(ECCS)ATrainsuctionlineI-24"-CS-2nearatackweldforthespoolnameplatebetweensupports2412-23and2412-20andonTrainBsuctionlineI-24"-CS-3adjacenttosupport2407-17withintheRefuelingWaterStorageTank(RWT)Trench.Theleakratesareextremelysmallandnotquantifiable;theywerediscoveredbythepresenceofasmallmoundofboricacidcrystalsonthepipe,therefore,operationalleakageisnotanissue.PSL-ENG-SEMS-98-102wasissuedinNovember1998toreviewtheconditionoftheUnit2RWTsuctionlines.Thisevaluationdevelopedthesystempipingdesignrequirements,summarizedpastidentificationofindicationsandexaminationresults,andidentifiedthefailuremechanismaschlorideinducedstresscorrosioncracking.TheevaluationdevelopedamethodforacceptingtheidentifiedflawsforlimitedcontinuedoperationbasedontheAcceptancebyEvaluationrulesoftheASMESectionXICodeanddemonstratethatthepipingissuitableforoperationuntiltheCycle12RefuelingOutage.APTECHanalysisAES-C-3566,Revision0waspreparedtodeterminetheallowablethroughwallflawlengthsandexpectedservicelifeofECCSsupplypipingsubjecttocorrosionontheoutsidesurface.TheallowableflawlengthisbasedontheacceptancecriteriaofASMESectionXI,IWB-3640foralldesignloadingconditions.Theevaluationconcludedthattheallowableflawlengthforpostulatedthroughwallcracksis27.8inchesforcircumferentialflawsand13.6inchesforaxialflaws.Asaresult,thestructuralintegrityofthepipingforalldesignloadsisadequateperASMESectionXIIWC-3122.4AcceptancebyEvaluationcriteriaprovidedthatflawlengthsaredetectedpriortotheirgrowthtotheabovesizecriteria.Toprovidefortherequireddetection,monthlyinspectionsofthesubjectpipingareconductedtolookforthroughwallleakage.Experienceindicatesthatflawsdonotgrowtogreatlengthspriortotheirpropagationthroughwall.Experiencealsoindicatesthatthroughwallflawsresultinsmall,butdetectableleaks.Accordingly,theApTechreportrequiresmonthlysurveillancesofthesubjectpipingtodetectthroughwallleakage.Itwasunderthisinspectionsurveillancethattheboricacidcrystalswereidentifiedonbothl-24"-CS-2andI-24"-CS-3.Theleakratesareextremelysmallandnotquantifiable.Sincethroughwallleakagewasidentified,anoperabilitydeterminationisrequired.GenericLetter91-18,"InformationtoLicenseesRegardingNRCInspectionManualSectiononResolutionofDegradedandNonconformingConditions,"containsguidanceforresolutionofdegradedandnonconformingconditionsandOperabilitydetermination.PerthisGenericLetter,andtheNRCInspectionManual,Part9900,section6.15,Operationalleakage,leakagethroughClass1,2or3pipewallisnotacceptableforcontinuedoperation(exceptinthecaseofmoderateenergyClass3pipinginaccordancewithGenericLetter90-05).Becauseofthis,theClass2ECCSsuctionpipingwasdeclaredinoperable.Assuch,theplantdeclaredbothtrainsoftheECCSsuctionpipingOOS.InaccordancewithTS3.5.2,theplanthasnoactionstatementforthelossoftwoindependentECCSsubsystems.Therefore,thecontrolroomenteredApplicabilityspecification3.0.3,a1hourLCOtoinitiateactiontoplacetheunitinaMODEinwhichthespecificationdoesnotapplybyperformingaplantshutdown. CR99-0445Attachment1Page3of4AverbalrequestwasmadetotheNRCregardingapplicationofGenericLetter91-18criteriatoClass2moderateenergysystems.ThisisdocumentedinaphoneconversationwiththeNRCconductedon4/6/1999.ThebasisforthisrequestisthedesignoftheECCSsuctionpipingwhichisrecognizedasbeingsimilartolowpressure,lowenergyClass3piping.Asdocumentedinattachment2tothisCRtheNRChasverballyapprovedtheuseoftheGL91-18criteriaforClass3throughwallleaksapplicabletotheUnit2ECCSsuctionpipingClass2system.ThefollowingisprovidedwhichsupportsOperabilityoftheECCSsuctionpiping:AreviewofPSL-ENG-SEMS-98-102determinedthattheindicationsidentifiedaboveareboundedandwithinthescopeoftheevaluationandtheAptechReport.Operationalleakageissmallandnotquantifiable.MeetingTSrequirementsforRWTinventoryassuresacceptanceofanyoperationalleakage.ConsequencesofaccidentalleakageareboundedbythediscussionprovidedinPSL-ENG-SEMS-98-102,Rev.1.EngineeringEvaluationPSL-ENG-SEMS-98-102providesthecurrentbasisforcontinuedoperationofSt.LucieUnit2ECCSpipingbasedonthedeterminationofthestablethroughwallflawlength.Theanalysisrecognizesthatthecalculatedstableflawlengthiswellinexcessofanyflawlengthlikelytobeobservedinthefieldpriortoidentificationbyleakage.Theevaluationrecognizesthatnotallaxialandcircumferentialweldswithinthe1-24"-CS-2andCS-3lineshavebeenpenetrantinspected.Shouldflawsbepresentintheseareas,theyareandwillremainboundedbytheevaluationmadeunderSectionXIcriteriawithinPSL-ENG-SEMS-98-102.Engineeringmayrecommendadditionalinspectionsduringthecurrentcycleduetotheserecentindications.SecificCorrectiveActions:1.PerNRCphonecall,areliefrequestwillbesubmittedtotheNRCperASMEXI1989AdditionIWA5250(3),within24hours.GenericCorrectiveActionsNecessartoPreventRecurrence:GenericCorrectiveActionswillbeaddressedlater. CR99-0445Attachment1Page4of40erabilitStatement:TheEmergencyCoreCoolingSystemisSafetyRelatedasitisrequiredtomitigatetheeffectsofadesignbasisaccident.,Thecondition,asdiscussedabove,whichincludesverbalapprovalbytheNRC,allowscontinuedoperation.7'4cNcc55ysce~,~c~s;/~~Pups4le<l~l<<
References:
1.St.Lucie2FSAR,Amendment122.St.Lucie2TechnicalSpecifications,Amendment983.GenericLetter91-184.EngineeringEvaluationPSL-ENG-SEMS-98-102,Rev1,includingAptechReport.Prepedeviewd:Date/7rrpwi&~ From:E.J.WeinkamTo:File)APPIac4~l2cuV~-oVZslok9
Subject:
TELCONSummaryDate:Apri16,1999Time:1334untilabout1420hParticipants:FPLStallKundalkarWestMoranBladowWeinkamNRC/RIIPliscoMcCreeBlakeRudisailRogersRossLanyiWarnicketal.NRC/NRRBerkowPetersonWichmanGleavesMcClellanetal.Purpose:FPLcalledtheNRCtodiscusstheleaksdiscoveredontheUnit2ECCSsupplylines.Unit2enteredT/S3.0.3forbothECCStrainsinoperableat1100on04//06/99.FPLdiscussedpotentialrelieffromGL91-18(i.e.,therequirementtodeclarethelinesinoperable)basedonthefactthatFPLhadaboundingflawanalysis.Summary:ThecallwasmadetoabridgelinethroughtheNRC'sOperationsCenter.Thephonecallwasrecorded.ArtStallsummarizedthesituationofgridstabilityconcernsandTurkeyPointUnit4startup;healsodiscussedFPL'scommitmenttofixtheflawsinatimelymanner.RustyWestsummarizedplantstatus;thatUnit2shutdownhadcommencedat1100andthattheunitwouldbeofflineby1700.RajKundalkarsummarizedthetechnicalissue.Wichmanaskedserviceconditionsofpipe;KundalkarrespondedandWichmanstatedthatthepipingwas,therefore,Class2moderateenergy.WichmanaskedifwehaddoneNDE;FPLsaidno,wewouldbedoingitASAP.
TELCONSummary-04/06/99~Hrrr4,ppCg9Q~g4ff/5P<~ao)Z.WichmanstatedthatGL90-05andCodeCaseN513hadbeenappliedinregulatoryapplicationstomoderateenergyClass2piping.4KundalkarstatedthatwewouldfixtheleaksASAPbutinnocaselaterthantwoweeks.Stallstatedthatwewouldbereplacingthepipingatthenextoutage(April2000).Afteradditionaldiscussiononwhatwasneeded,NRRconcluded(withtheinterpretationandNRRpositionthathasbeenappliedinthepast)thattheGL91-18limitationinsections6.13.and6.15thatClass3flawevaluationsIAWGL90-05canberelaxedtoapplytoOPERABILITYevaluationsformoderateenergyClass2pipes.WichmanstatedthatFPLwouldneedareliefrequesttooperateforthetwo-weekperiodwiththroughwallleaksinClass2piping.FPLstatedthatonewouldbesubmittedwithin24hours.NRC/NRR(BerkowandWichman)statedthatNRCapprovalisnotrequiredforthe'PERABILITYcall.FPLstatedthatitwouldcharacterizetheflaws.WichmansaidthatusingGL91-18,licenseescouldsubstitutethewords"Class2"for"Class3"inpipingflawcharacterizationsconductedIAWGL90-05.Wichmanisexpectingareliefrequesttomorrow(tobesenttoGleavesandRegionII).ItshouldaddressGL90-05andCodeCaseN-513.FPLwasrequested,baseduponaquestionfromMcCree,tosharewiththeSeniorResidentthenumberofpriortimesthatFPLhashadtoentertheACTIONStatementtorepairthrough-wallleaksonUnit2ECCSsuctionpiping. ECCSWalkdownDetails:P8sc4~/SWC~W7-dY~/>P>PeIof+1."A"Header-Drywhiteboricacidcrystalsontheupperrightfilletweldthatattachesthecodenameplatetothepipingspool,approximatelyi/~"longcrack.Someweepageafterplatewasremovedandareacleaned.2."B"Header-Drywhiteboricacidcrystalsonlowersoutheastlugfilletweldadjacenttothepipeclampforsupport2407-17,approximately'/4"indiameter.Noactiveleakage3."B"Header-Drywhiteboricacidcrystalsonuppernorthwestlugforsupport2407-17,adjacenttothelugfilletweld,lessthen'/4"indiameter.Noactiveleakage.Linearindicationapproximatelyi/~"long.4."B"Header-Drywhiteboricacidcrystalsfoundonasupportmemberjustbelowsupport-2407-19.Noactiveleakage.(Noevidenceofleakageorboricacidonthepipingcouldbefound).ThoCoste-VT-2LindaughVT-2 BII5Lv&~rcAcroLl/IQuvcwOF~icAC/Ql4'locaok8<tc8ctQ
Cg5/lr+qtPc$cs/p')(Qr~(PtI.ipSCZ-24-CS'252<OT-180~I./I5II~~8"3r.l~4.o.')"~~~% CR99-0445Attachment4,Page1of4INTERIMENGINEERINGDISPOSITION:Backround/EventDescrition:CR99-0445concernsthroughwallleaksonbothUnit2EmergencyCoreCoolingSystem(ECCS)TrainslocatedwithintheRefuelingWaterStorageTank(RWT)trenchasindicatedintheattachedsketch(Attachment3).Theleakratesareextremelysmallandnotquantifiable;theywerediscoveredbythepresenceofasmallmoundofboricacidcrystalsonthepipe.Attachment4tothisCRisissuedtocapturetherevisiontoAptechCalculationAES-C-3566andEngineeringEvaluationsPSL-ENG-SEMS-98-102identiTiedinAttachment1,statethattheoperatingpressureandtemperaturesforI-24-CS-2andI-24-CS-3areclassifiedasmoderateandtoaddresstheasfoundcracklengthonl-24-CS-3.~OiBThesubjectRWTsuctionpipingprovidesaflowpathfromtheRWTtotheECCSpumpsforuseduringtheInjectionPhasefollowingaDesignBasisAccident.Thisfunctionissafetyrelatedandisaddressedintheplant'sFSARandTechnicalSpecifications.Accordingly,thisCRisclassifiedassafetyrelated.AsdiscussedinUnit2FSARSection6.3.2.2.4,theRWTisanatmospherictankcontainingwaterboratedbetween1720and2100ppm.RedundantlinesareprovidedfromasinglenozzleonthetanktoprovidesuctiontotheAandBTrainsofECCSPumpslocatedintheRAB.ThesuctionlinesareroutedtotheRABinabelowgradetrenchwhichisopentotheatmosphere.PerT.S.3.5.2,inModes1,2,and3(withpressurizerpressuregreaterthanorequalto1750psia),twoindependentECCSsubsystemsshallbeOPERABLEwithindependentflowpathscapableoftakingsuctionfromtheRWT.PerT.S.3.5.3,inMode3(withpressurizerpressurelessthan1750psia)andMode4,aminimumofoneECCSsubsystemshallbeOPERABLEwithaflowpathtotheRWT.PerT.S.3.1.2.1,inModes5and6,aminimumofoneboroninjectionflowpathshallbeOPERABLEwhichincludesaflowpathfromthe,RWTviaeitherachargingpumporaHPSIpump,meetingtherequirementinT.S.3.1.2.7bifonlytheRWTflowpathisOPERABLE.TheRWTsuctionlinesmustbeabletopassdesignflowatadesignpressureof60psigandadesigntemperatureof300'FtotheECCSpumps,havetheabilitytomaintainthepressureboundaryandtheRABintegrity.OperatingpressuresaredefinedbythecolumnofwaterwithintheRWTtankandoperatingtemperaturesaredefinedbyatmosphericconditions.AsdetailedwithintheTotalEquipmentDatabase(TEDB)andplantdrawings,LinesI-24"-CS-3(TrainA)andI-24"-CS-2(TrainB)areconnectedtoasinglenozzleontheRWTandprovidesuctionfortheECCSsystems.Thepipingdesignpressureis60psigat300'F,withamaximumnormaloperatingpressureof30psigat120'Fwhichareclassifiedasmoderateenergylines(275psig/200').Thepipeis24"schedule10(wallthicknessof0.250")inaccordancewithEbascoPipeCodeSS-5.LinesI-24"-CS-2and-3aredesignedinaccordancewithASMESectionIII,Class2requirementsandareconstructedofASTMA-358,Class1,Type304stainlesssteelmaterial.Unit2iscurrentlyintheSecondTenYearIn-ServiceInspection(ISI)Interval.ThecodeofrecordforRulesforIn-ServiceInspectioninthisintervalisASMESectionXI1989.
CR99-0445Attachment4,Page2of4Evaluation/0erabiliCR99-0445concernsthroughwallleaksonUnit2EmergencyCoreCoolingSystem(ECCS)ATrainsuctionline1-24"-CS-2nearatackweldforthespoolnameplatebetweensupports2412-23and2412-20andonTrainBsuctionlineI-24"-CS-3adjacenttosupport2407-17withintheRefuelingWaterStorageTank(RWT)Trench.Theleakratesareextremelysmallandnotquantifiable;theywerediscoveredbythepresenceofasmallmoundofboricacidcrystalsonthepipe,therefore,operationalleakageisnotanissue.PSL'-ENG-SEMS-98-102wasissuedintoreviewtheconditionoftheUnit2RWTsuctionlines.Thisevaluationdevelopedthesystempipingdesignrequirements,summarizedpastidentificationofindicationsandexaminationresults,andidentifiedthefailuremechanismaschlorideinducedstresscorrosioncracking.TheevaluationdevelopedamethodforacceptingtheidentifiedflawsforlimitedcontinuedoperationbasedontheAcceptancebyEvaluationrulesoftheASMESectionXICodeanddemonstratethatthepipingissuitableforoperationuntiltheCycle12RefuelingOutage.APTECHanalysisAES-C-3566,Revision1waspreparedtodeterminetheallowablethroughwallflawlengthsandexpectedservicelifeofECCSsupplypipingsubjecttocorrosionontheoutsidesurface.TheallowableflawlengthisbasedontheacceptancecriteriaofASMESectionXI,IWB-3640foralldesignloadingconditions.Theevaluationconcludedthattheallowableflawlengthforpostulatedthroughwallcracksis32.2inchesforcircumferentialflawsand13.6inchesforaxialflaws.Asaresult,thestructuralintegrityofthepipingforalldesignloadsisadequateperASMESectionXIIWC-3122.4AcceptancebyEvaluationcriteriaprovidedthatflawlengthsaredetectedpriortotheirgrowthtotheabovesizecriteria.Toprovidefortherequireddetection,monthlyinspectionsofthesubjectpipingareconductedtolookforthroughwallleakage.Experienceindicatesthatflawsdonotgrowtogreatlengthspriortotheirpropagationthroughwall.Experiencealsoindicatesthatthroughwallflawsresultinsmall,butdetectableleaks.Accordingly,theApTechreportrequiresmonthlysurveillancesofthesubjectpipingtodetectthroughwallleakage.ItwasunderthisinspectionsurveillancethattheboricacidcrystalswereidentifiedonbothI-24"-CS-2andI-24"-CS-3.Theleakratesareextremelysmallandnotquantifiable.Sincethroughwallleakagewasidentified,anoperabilitydeterminationisrequired.GenericLetter91-18,"InformationtoLicenseesRegardingNRCInspectionManualSectiononResolutionofDegradedandNonconformingConditions,"containsguidanceforresolutionofdegradedandnonconformingconditionsandOperabilitydetermination.PerthisGenericLetter,andtheNRCInspectionManual,Part9900,section6.15,Operationalleakage,leakagethroughClass1,2or3pipewallisnotacceptableforcontinuedoperation(exceptinthecaseofmoderateenergyClass3pipinginaccordancewithGenericLetter90-05).Becauseofthis,theClass2ECCSsuctionpipingwasdeclaredinoperable.Assuch,theplantdeclaredbothtrainsoftheECCSsuctionpipingOOS.InaccordancewithTS3.5.2,theplanthasnoactionstatementforthelossoftwoindependentECCSsubsystems.Therefore,thecontrolroomenteredApplicabilityspecification3.0.3,a1hourLCOtoinitiateactiontoplacetheunitinaMODEinwhichthespecificationdoesnotapplybyperformingaplantshutdown.TheAptechanalysis,AES-C-3566,originallyissuedinDecember1998identifiesthatforaworstcaseflawof1.18",forthereferencedECCSpiping,theacceptableservicelifewouldbe2.7years.ThethroughwallcrackonI-24-CS-3wasidentifiedasaseriesofcrackswithatotallengthof1.5"andanassumedlengthontheIDofthepipeof2".ThisexceedstheinitiallengthassumedbyAptech,butbasedupontheconfigurationfoundandthe4monthsthathavepassedsincetheanalysis,thiscrackisconsideredboundedbytheanalysis.Additionally,thiscrackleakedbeforefurtherpropagationoccurred, CR99-0445Attachment4,Page3of4hasanticipated,andwillberemovedpriortoclosureofthisCRandwithinthereliefperiodrequestedfromtheNRC.AverbalrequestwasmadetotheNRCregardingapplicationofGenericLetter91-18criteriatoClass2moderateenergysystems.'hisisdocumentedinaphoneconversationwiththeNRCconductedon4/6/1999.ThebasisforthisrequestisthedesignoftheECCSsuctionpipingwhichisrecognizedasbeingsimilartolowpressure,lowenergyClass3piping.Asdocumentedinattachment2tothisCRtheNRChasverballyapprovedtheuseoftheGL91-18criteriaforClass3throughwallleaksapplicabletotheUnit2ECCSsuctionpipingClass2system.ThefollowingisprovidedwhichsupportsOperabilityoftheECCSsuctionpiping:AreviewofPSL-ENG-SEMS-98-102determinedthattheindicationsidentifiedaboveareboundedandwithinthescopeoftheevaluationandtheAptechReport.Operationalleakageissmallandnotquantifiable.MeetingTSrequirementsforRWTinventoryassuresacceptanceofanyoperationalleakage.ConsequencesofaccidentalleakageareboundedbythediscussionprovidedinPSL-ENG-SEMS-98-102,Rev.2.EngineeringEvaluationPSL-ENG-SEMS-98-102providesthecurrentbasisforcontinuedoperationofSt.LucieUnit2ECCSpipingbasedonthedeterminationofthestablethroughwallflawlength.Theanalysisrecognizesthatthecalculatedstableflawlengthiswellinexcessofanyflawlengthlikelytobeobservedinthefieldpriortoidentificationbyleakage.Theevaluationrecognizesthatnotallaxialandcircumferentialweldswithinthel-24"-CS-2andCS-3lineshavebeenpenetrantinspected.Shouldflawsbepresentintheseareas,theyareandwillremainboundedbytheevaluationmadeunderSectionXIcriteriawithinPSL-ENG-SEMS-98-102.Engineeringmayrecommendadditionalinspectionsduringthecurrentcycleduetotheserecentindications.SecificCorrectiveActions:1.PerNRCphonecall,areliefrequestwillbesubmittedtotheNRCperASMEXI1989AdditionIWA5250(3),within24hours.GenericCorrectiveActionsNecessatoPreventRecurrence:GenericCorrectiveActionswillbeaddressedlater. CR99-0445Attachment4,Page4of40erabiliStatement:TheEmergencyCoreCoolingSystemisSafetyRelatedasitisrequiredtomitigatetheeffectsofadesignbasisaccident.Thecondition,asdiscussedabove,whichincludesverbalapprovalbytheNRC,allowscontinuedoperation.TheECCSsystemisconsideredoperable.
References:
1.St.Lucie2FSAR,Amendment122.St.Lucie2TechnicalSpecifications,Amendment983.GenericLetter91-184.EngineeringEvaluationPSL-ENG-SEMS-98-102,Rev2,includingAptechReport.repare:ReviewedDae
FLORIDAPOWERANDLIGHTFACILITYREVIEWGROUPMINUTESAPRIL6,1999(StartTIme1600)FRG499-053ST.LUCIEPLANTTo:DistributionChairman:BobEnfingerMembers:KrisMohindrooArtSingerWesBladowGregPustoverFRGconvenedontheabovedateandtimewithmembershipasshown.IthasbeenverifiedalegalquorumexistsoftheFRGChairman,orhisdesignatedalternate,andfour(4)members,includingnomorethtwo(2)alternates.VerifiedbyFRGSecretaFRGSecretary:HelgaBaranowskyFRGObservers:NRCInspectors,EdWeinkam(Licensing),RickWalker(Training-ProtectionServices),RustyWest(PGM)TheFRGaddressedthefollowingitemswithdispositionsasshown:.CR99-0445InterimSafetyRelatedSponsor:RickNobleUnit2Att8ECCSSuctionHdrsDuringmonthlySPGinspection,evidenceolBoricAcidresiduewasidentifiedonCS-3,'A'CCSsuctionheaderandCS-2CCSsuctionheader.BothECCSheadersdedaredOOSat1190.YESItwasdeterminedthatanunreviewedsafetyquestionasdefinedby10CFR50.59,didnotexist.Also,therewere'no10CFR21concernsunlessstatedabove.Havingnofurtherbusinesstoconduct,FRGadjournedat1645.FRGrecommendsdispositionasshownabovePapprovesFRGrecommendation4FRGChairmnDatePlantGeneralManagerateDistribution:R.Acosta,CNRBT.Plunkett,President-NuclearDivision,W.Bladow,QAR.West,PlantGeneralManagerA.Stall,SiteVicePresidentPage1of1'Walk-initemaddedtoagenda}}