ML18030A185

Revised Final Deficiency Rept Re Improper Sloping of Piping & Tubing Lines for GE Instrumentation.Lines Will Be Installed Which Slope 1/2 Inch Per Ft

ML18030A185
Person / Time
Site:	Susquehanna
Issue date:	12/23/1980
From:	CURTIS N W PENNSYLVANIA POWER & LIGHT CO.
To:	GRIER B H NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
10CFR-050.55E, 10CFR-50.55E, ER-100450, ER-100508, MCAR-1-58, PLA-593, NUDOCS 8101050332
Download: ML18030A185 (6)

Text

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DearMr.Grier:

Thislettertransmitsarevisedfinalreportrelativetoadeficiencyinthe,installationofinstrumentationpipingandtubingconnectedtoG.E.nstrumenaion.TherevisedreportsupercedesinformationpreviouslyprovidedbyPLA-512whichreportedthedeficientconditioninaccordancewiththeprovisionsof10CFR50.55(e).Therevisedreportprovidesatableofacceptancecriteria(TableI)forreworkedlines.Theacceptancecriteriafor,futureinstrumentlineinstalla-tionsremainsasoriginallystated(>I2"perfoot)inPLA-512.Wetrustyouwillfindthissupplementalinformationtobesufficient.Verytrulyyours,N.W.CurtisVicePresident-Engineering&Construction-NuclearAttachmentARS:mcbPENNSYLYANIAPOWERCLLIGHTCOMPANY Mr.BoyceH.Grier2-December23,1980cc:Mr.VictorStello(15)Director-OfficeofZnspectionaEnforcementU.S.NuclearRegulatoryCommissionWashington,D.C.20555~~9~+cDong,4;Q.inctoy~OfficeofManagement'Znformation6ProgramControlU.S.NuclearRegulatoryCommissionWashington,D.C.20555Mr.RobertM.GalloU..S.NuclearRegulatoryCommissionP.0.Box52Shickshinny,Pennsylvania18655 MCAR1-58FINALREPORT(REV1)~SubeccTheinstalledpipingandtubingtoGEequipmentislackinggroperslope.DescritionofPotentialProblemGeneralElectricPipingandTubing,ProcessInstrumentationSpecification22A4019,Paragraph4.2.2.1.2,states:"Whereslopesareindicatedintheinstallationarrangementschematicsorelsewhere,aminimumslopeof1/2"perfootshallbeprovided."Contrarytothestatedrequirement,BechtelNonconformanceReport5807lists41smallpipeinstallationstoGeneralElectricequipmentthatdonotmeettheminimum1/2"perfootsloperequirement.CauseThreeconditionsmayhavecontributedtotheinstallationerror.Theyare:1.Projectengineeringdidnotspecifytherequiredslope(i,e.l/2"perfootmin)onsomeofthedesigndrawings.2.Constructionfailedtoincorporatespecifiedsloperequirementsonsomeofthefieldpreparedfabricationisometricdrawings.3.ConstructionfailedinsomecasestoinstallthesmallpipetotheslopespecifiedontheFieldfabricationisometricdrawings.AnalsisofSafetyImplicationsProjectEngineeringhasdeterminedifthedeficiencyweretohavegoneuncorrecteditcouldhaveadverselyaffectedthesafeoperationoftheplant,anditisthereforedeemedreportableunder10CFR50.55(e).Thisdeficiencycouldproduceanerrorinessentialinstrumentationinexcessofdesignlimits.Inaccurateinstrumentreadingsanddelayedtripscouldresultonlineswhichhavedifferentialinstrumentswhichfunctiononlowdifferentialpressures.Thiswouldbetheresultofairentrapmentinthelinescausedbyimproperslope.'owever,lineswithdeviceswhichoperateonhighdifferentialpressurewouldnotbeassensitivetoslopevariationsandwouldnotadverselyaffectthesafeoperationoftheplant.CorrectiveActionFieldqualitycontrolhasdocumentedonNonconformanceReports5807and6055all.linesthatdonotmeettherequirementsoftheGEspecification(i.e.,1/2"perfootminimumslope).ProjectengineeringhasreviewedtheproblemwithGeneralElectricengineeringandrevisedacceptancecriteriahavebeendevelopedfor"installed"pipingforthevariouscategories.ofinstrumentationinvolved.Engineeringi~iemoforConstruction4992,datedJune16,1980for'wardedthiscriter'atothefield.'AttachmentPage1of2 Rev1Thoselineswhich'havenotyetbeeninstalledshallbeinstalledwithaslope4"perfoot.InstalledlineswhichrequirereworkshallbeslopedtotherequirementsofTableIasaminimum.Fieldconstructionisreworking-identifiedlineswhichdonotmeettherevisedacceptancecriteria.TheUnitIas-builtdrawingswillincludetheactualslopeofinstalledline'.ProjectengineeringwillreviseUnitZZSKM'stoincludeanotethatthepipeandortubingshallbeinstalledtohaveaminimumslopeof4"perfoot(Ref.GESpec.22A4019)andUnitIIP&ZDstoincludetheGEspecificationasareference.FieldengineeringwillrevisetheUnitZIfabricationisometricstoreflecttheaboverecuirements.Pro'ectedCompletionofCorrectiveActionAll.affecteddrawingsareprojectedtoberevisedandUnitIas-builtsareprojectedtobecompletedbyDecember30,1980.Zntheinterim,fieldcon-structionwasnotifiedbyEngineeringMemoforConstruction5062totakestepstoinsurethatthesubjectpipeandtubingareinstalledinaccordancewithGESpecification22A4019.AnyexceptionsaretobedocumentedbyaNoncon-formanceReport.AttachmentPage2of2 TABLEI'ranRPVorprocesslineconnectiontopenetrationfluedheadLinesList'edinMte2.>5/16"perfootcontinuousslopeLinesListedinNote3continuouspositives}ope(1)Frcxnpenetrationfluedheadtoexcessflowcheckvalves(onlyiflengthislessthan3feet)>3/16"perfootcontinuousslopeZeroslopeOKmtes:3.A-.slope'of>-1/8"per=foot-isconsidered-pos'itive2.Wefollowingfunctionsareincluded:{a)RPVlevel(excepttopheadlevelsensingline)(b)CoreSpraydp(c)Y~pnSteamflowsignaltofeedwatercontrolsystem3.Thefollowingfunctionsareincluded:(a)Topheadlevelsensingline(b)Coreap(c)Mainsteamhighflowisolation(d)Elbowtaps(Recirc,RHR,RCZC,HPCZ,RNCUSystems){e)Jetpumpinstrumentation(f)Recircpumpdp(g)Recircloopsuctionpressure(h)Headflangesealpressure(i)Recircpumpsealpressure(j)Belmcoreplatepressure(k)RPVdrainlinepressure4.Recircloopsamplelinedoesnotrequireslope