ML18030A010

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Final Deficiency Rept Re Nonconforming ICO-Rally,Type SLV-1200 Braided Fiberglass Sleeving Used as Barrier Matl for Electrical Separation.Caused by Inadequacy of Bechtel Recommendation Authorizing Field Purchase
ML18030A010
Person / Time
Site: Susquehanna  Talen Energy icon.png
Issue date: 09/05/1980
From: CURTIS N W
PENNSYLVANIA POWER & LIGHT CO.
To:
References
10CFR-050.55E, 10CFR-50.55E, ER-100450, ER-100508, MCAR-1-41, NUDOCS 8009090472
Download: ML18030A010 (6)


Text

mmtREGULATIINFORMATIONDISTRIBUTIONTEM(RIDS)ACCESSIONNBR:8009090472DOC~DATK:80/09/05NOTARIZED:NODOCKETFACIL:50387SusquehannaSteamElectricStationRUnitiiPennsylva0500038750388SusmuehanneSteamElectnicStatieniUnitSiPannsvlva0~0'OTOAUTH~NAME=AUTHORAFFILIATIONCURTISiN.vl~PennsylvaniaPowerLLightCo~RECIP~NAMERECIPIENTAFFILIATION

SUBJECT:

FinaldeficiencyreotrenonconformingICORallyiTyoeSLV1200braidedfiberglasssleevingusedasbarriermatlforelectricalseoaration~CausedbyinadequacyofBechtelrecommendationauthorizingfieldourchase.DISTRIBUTIONCODE:80198COPIESRECEIYED:LTR/ENCLJSIZE:+TITLF.:ConstructionDeficiencyRe@ort(10CFR50.55K)NOTES:SendILE3cooiesFSARLallamends.0500038705000388RECIPIENTIDCODE/NAMEACTION:A/0LICENSNG04RUSHBROOKgM~06INTERNAL;AD/RCI/IE17ASLBP/J~HARDDIREHUHFACS10EQUIPQUALBRilLICQUALBR12NRCPDR02PROC/-,RKV1301SDRDSDEV21COPIESLTTRENCL111111111111111111111RECIPIENTIDCODE/NA.IEYOUNGBLOOOEB05STARKPR~07AEOD18D/DIRHUMFAC15EDOLSTAFF19ILE09MPA20OELD21QABR14RUTHERFORD8'4~IECOPIESLTTRENCL1111,1111112211111111EXTERNAL:ACRSNSIC1608161611LPOR0311@p~7f7gTOTALNUMBEROFCOPIESREQUIRED:LTTR40ENCL40 TWONORTHNINTHSTREET,ALLENTOWN,PA.18101PHONE((215)8215151NORMANW.CURTISVicePtesident-EngineetingILCcnsttuction-Nucleer8218381September5,1980Mr.BoyceH.GrierDirector,RegionIU.S.NuclearRegulatoryCommission631ParkAvenueKingofPrussia,Pennsylvania19406SUSQUEHANNASTEAMELECTRICSTATIONFINALREPORTOFADEFICIENCYZNBARRIERMATERIALUSEDFORELECTRICALSEPARATION(MCAR1-41)ERs100450/100508FILE840-4/900-10PLA-539

DearMr.Grier:

ThisletterservestoconfirminformationprovidedbytelephonetoNRCInspectorMr.R.McGaughybyMr.A.R.SabolofPPGLonAugust7t1980.Duringthatconversation,Mr.McGaughywasadvisedthatthesubjectconditionwasunderevaluationforreporta&ilityundertheprovisionof10CFR50.55(e).ThedeficiencyinvolvesZCO-RallytypeSLV1200braidedfiberglasssleevingwhichwasusedasbarriermaterialforprovidingelectricalseparation.ThismaterialhadoriginallybeenapprovedforuseatSusquehannaandhadbeenusedextensivelyintheplant.However,basedupontheresultsofqualifi-cationtesting,itwasdeterminedthattheICO-RallymaterialdidnotprovideanadequatebarrierasrequiredbyXEEE-3841974.TheICO-RallymaterialonsitehasbeenidentifiedasnonconformingandisbeingcontrolledunderBechtelNCR6048andPPGLNCR80-208(forequipmentthathasbeenturnedovertoPPGLfromBechtelconstruction).FieldProcedureFP-E-10,VerificationofSeparationwithinElectricalEquipment,requires100%inspectionofsafety-relatedelectricalequipmentforphysicalseparationrequirements,includingapprovedbarriermaterial.Znaddition,thisconditionisbeingtrackedbyBechtelMCAR1-41.Areportconcerningthecondition,alongwithananalysisofthesafetyimpli-cationsandcorrectiveaction,isincludedasanattachmentpursuanttoPPGL'sobligationsundertheprovisionsof10CFR50.55(e).Sincethedetailsofthisreportprovideinformationrelevant.tothereportingrequirementsof10CFR21,thiscorrespondenceisconsideredtoalsodischargeanyformalresponsibilityPP&Lmayhaveforreportingincompliancethereto.'EO/g58oOSOSII"t7~PENNSYLVANIAPOWER8LIGHTCOMPANY

Mr.BoyceH.Grier.September5,1980Weanticipatethatallactionsrequiredtoresolvethisdeficiencywillbecompletedbeforefuelload.WetrusttheCommissionwillfindtheinformationprovidedbythislettertobesatisfactory.Verytrulyyours,N.W.CurtisVicePresident-Engineering6Construction-NuclearAttachmentARS:mcbcc:Mr.VictorStello(15)Director-OfficeofInspection&EnforcementU.S.NuclearRegulatoryCommissionWashington,D.C.20555Mr.G.McDonald,DirectorOfficeofManagementInformation6ProgramControlU.S.NuclearRegulatoryCommissionWashington,D.C.20555Mr.RobertM.GalloU.S.NuclearRegulatoryCommissionP.O.Box52Shickshinny,Pennsylvania18655 AttachmenttoPLA-539SEPARATIONBARRIERMATERIALS-ICORALLYPerIEEE384-1974,Sec.5.6.2,InternalSeparation,abarrierisrequiredbetweenredundantClass-lEEquipmentandwiring.Suchbarriersarerequiredwhenevercontrolswitchboardmaterialsareflameretardant,analysisisnotperformed,andtheminimumseparationdistanceislessthan6inches.Abarrierisdefined,inSection3,as"adeviceorstructureinterposedbetweenClass-lEEquipmentorcircuitsandapotentialsourceofdamagetolimitdamagetoClass1Esystemstoanacceptablelevel."Inaccordancewiththeabove,BechtelDrawingE-59,Revision6,wasissuedtothefieldonJuly30,1979providingauthoritytothefieldtopurchaseandinstalltwo(2)brandsofbraidedfiberglasssleevingortaperIco/RallyCorporationtypeSLV1200'rHAVEGIndustries,Znc.,Sil-Tempsleevtng(TypeS),orSil-Temptape(TypeWT65).Inaddition,onJanuary25,1980,E-59,Rev.9wasissuedbyBechteltoallowthefieldtopurchase-andinstallathirdbrand'fbarriermaterial,CarburundumCo.,FiberfraxSleeving(TypeHP-144T)orTape(Type3L-144T).Zneachinstance,documentationwasrequiredverifyingthatthematerialspassedboththevert.flametestperPub.No.WC5(IPCEAS-61-402)andhasaflamespread,smokedevelopedzatingof25orlessperASTM-E-84.InlinewithourconservativeapproachtoseparationatSusquehannaSESandtheindirectreferencetobarriermaterialspecificationsprovidedinIEEE-384,Section3,on1/23/80,PPaLrequestedBechteltoexpediteadditionalqualifieecationtestsofthesleevingortapetypebarriermaterialsapprovedforuseatSusquehannaSES.ThesetestswereauthorizedbyBechteltobeperformedatWyleLaboratoriesinNorco,CaliforniainMarch,1980.ThetestreportwasissuedonMay16,1980.Duringthesetests,two(2)cablesorbundlesofwireswereisolatedbyawrappingorsleevingofbarriermaterialontheprimarycableorbundle.Thesourceofdamagewasashortcircuitcurrentwhichfusestheoverloadedprimaryconductorinfive-plusminutes.Acceptabledamageisthatwhichallowsthesecondarycircuittocarryitsratedcurrentthroughoutthetest.EveryconfigurationincludingthoseinwhichZco-Rallymaterialwasused,passedthetest.However,achievedtemperaturesweremeasuredcarefullyduringthetests.TheSil-tempandFiberfraxproductsareratedfor3000F.TheIco-Rallyproduct0isonlyratedfor1200oF.Asthehot-spottemperatureswerearound1500F,theIco-Rallyproductwasdisapprovedforuse.Inaddition,theIco-Rallyproductismanufacturedwithanabrasionresistantfillerwhichsupportedflame.TheSil-TempandFibezfrax(T)pzoductdidnot.ZnoneofthetestsflameeruptedovertheentirelengthoftheZco-Rallysleevingandburnedforoveroneminute.THisfurther)ustifiedourrejectionofIco-Rally.Cause:TheWyleLaboratoriestestresultsprovidedqualificationbyanalysisthattwobrandsofmaterials,SilTempandFiberfrax,aresuitableforuseatSSESand Page2AttachmenttoPLA-539onematerial,theZco-Rally,doesnotmeetthestrictrequirementsweprovidedinaccordancewithIEEE-384.AnalsisofSafeImlications:AbarrierisdefinedinSection3ofZEEE>>3841974as"adeviceorstructureinterposedbetweenClass1EEquipmentorcircuitsandapotentialsourceofdamagetolimitdamagetoClasslEsystemstoanacceptablelevel."ZntheconfigurationwhereIco-RallywasusedatSusquehannaSES,theprotectionprovidedforlE-cablingwascompromisedbasedonthesinglefailurecriteriaofZEEE-279.Basedonouranalysis,theindependenceofredundantClass-1E.cablingwascompromisedbelowanacceptablelevelwhenIco-Rallywasusedastheseparationbarriermaterial.ProjectEngineeringhasdeterminedtheZco-Rallymaterialdeficienciesidenti-fiedintheWyleLab.teststobereportableunder10CFR50.55(e).CorrectiveAction:BechtelissuedE-59,Revision9,.Change3tothefieldonJune5,1980whichrenevedZco-RallyfromthelistofmaterialsapprovedforuseandrequiredthatpreviouslyinstalledIco-Rallymaterialbereplacedwithanapprovedmaterial.TheorganisationofthiseffortisinaccordancewithBechtelFieldProcedureFP-E-10whichperformsa100%inspectionofallequipmentwhereseparationbarriermaterialsarerequired.ThisworkisstillinprogressandisbeingtrackedbyFieldProcedureFP-E-10.Conclusions:ProjectEngineeringinstructionsandfieldverificationshouldprovidefortheremovalofallZco-Rallyandinstallationofasuitablequalifiedalterna-tive.ThiswillprovideforanadequatebarrierinstallationasdefinedbyZEEE-384.