ML17206A612

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Responds to NRC Ltr Re Violations Noted in IE Insp Rept 50-389/78-10.Corrective Actions:Presents Explanation of Problem W/Loose Impeller Locking Nut & Why Incident Was Not Reported to Nrc.W/Encl Correspondence Re Issue
ML17206A612
Person / Time
Site: Saint Lucie NextEra Energy icon.png
Issue date: 12/19/1978
From: UHRIG R E
FLORIDA POWER & LIGHT CO.
To: MURPHY C E
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML17206A611 List:
References
L-78-391, NUDOCS 7901180316
Download: ML17206A612 (13)


See also: IR 05000389/1978010

Text

P.O.IIOX013100,MIAMI.FL33101FLORIDAPOIlVERaLIGHTCO'".PA/.~December19,1978L-78-391Mr.C.E.Murphy,ChiefReactorConstructionandEngineeringSupportSranchU.S.NuclearRegulatoryCommission101MariettaStreet,Suite3100Atlanta,Georgia30303

DearMr.Murphy:

Re:RII:RWW50-389/78-10FloridaPower&LightCompanyhasreviewedthesubjectinspectionreportanditsresponseiscontainedinAttachmentA.Thereisnoproprietaryinformationcon-tainedinthereport.Verytrulyyours,~gjg.>>cRobertE.UhrigVicePresidentREU:LLL:cfAttachmentcc:Mr.JamesP.O'ReillyOfficeofInspectionandEnforcementHaroldF.Reis,Esquire 1I ATTACHMENTARESPONSETORII:RWW,50-389/78-10Findin1:2InchTaretRockSafetInectionValveDeficiencTheRIIinspectornotedthatbothCEandtheRIIhadinformedFPLofanexcessivepressuredropwiththesubjectvalves,andthatFPLappearedtoincorrectlyevaluatetheincidentasnon-reportable,contrarytoCE'sconclusionthatitindeedwasreportableunder10CFR50.55(e).~Resonse:Mewishtonotethat10CFR50.55(e)clearlystatesthattheholderoftheconstructionpermitisresponsibleforthedeterminationofwhetheraconstructionincidentisreportable,andnottheNSSSvendor.FPLhasusedtheassistanceofanumberofparties,includingCE,initsdetermin-ationofthereportabilityofthisitem,butbynomeansdoestheopinionofanoutsideorganizationbindustoitsconclusion.ItappearsthatthemajordifferencebetweenRIIandFPL,regardingthereportabilityofthisitem,liesintheinterpretationofthephrasein1050050.55(5(11(,"~iifl5fl11fl1dfg."(5dladded.)FPL'sreviewofthisproblemconcludedthattheissuewasavalidsafety-relateddefect,butnotasignificantone;therefore,noreportingwasrequired.Thisjudgementisbasedonthefactthat(1)thevalveswerenottobeinstalledforsometime,(2)theproblemwasidentifiedthroughnormalgAchannels(viaCE),and(3)therepairwasminorandeasilyperformedwithoutextensiveevaluationorredesign.Basedupontheabove,FPLmusttakeexceptiontothefindingsnotedbytheinspector.ItisFPL'sopinionthatproblemssuchastheabove,identifiedandresolvedthroughroutinechannels,arenormalrepairitemstypicallyencounteredonaconstructionsite.Duetothefactthatsafety-relatedequipmentwasinvolved,FPLinvokedtheevaluationproceduresandmaintainedrecordsoftheresolutiontoensureproperhandlingoftheissueandcompliancewiththeappropriategAprocedures.

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TTACHt<ENTA-RESPONSETORII:RWW,50-389/78-10Page2Findin2:Inersol1-RandI-RLowPressureSafetLPSIandContainmentSraPumCSPOeficiencTheRIIinspectornotedthatFPLknewofaproblemwithanimpellerlockingnutassemblyworkinglooseatoneofitsotherplants(TurkeyPoint)inNovember1975andwasinformedbyRIIonAugust23,1978ofthepotentialdeficiencyaswell.-Theinspectorfurtherstatesthatdespite"knowledgeofthispotentialsignificantdeficiencyinfinaldesign"FPLfailedtoreportthemattertotheNRCinaccord-ancewith10CFR50.55(e).~ll2:ThisissuearosefromFPL'sconcernoveramaintenanceitem.TheTurkeyPointproblemwasresolvedbytack-weldingthenuttight,andin1975FPLrequestedassurancefromI-RthatthisorsomeothersatisfactorymethodofsecuringthelocknutsforpumpstobesuppliedforSt.LucieUnit2wouldbeprovided.Atthistimethepumpswerenotyet'manufac-tured.Meareattachingcopiesofourcorrespondenceonthismatter,whichwerenotavailabletotheinspector,whichwebelievewillfurtherclarifytheissue.Ouropiniononthesignificanceofthisitemisthesameasthatforthefindingabove.Thisisaminoritem,pickedupbyFPL'snormalgAandpreventativemaintenanceprogramandisnon-reportable.Further,adeficiencyeitherinfinaldesignorconstruction,hasnotbeenidentifiedwiththepumpssuppliedforUnit2.Basedupontheabove,FPLmusttakeexceptiontothefindingnotedbytheinspector.FPLbelievesthatutilitieswhichusetheexperiencesofotherunitstouncoverandcorrectproblemsbeforetheydevelop,ashappenedintheseinstances,shouldbecorenended,andnotfoundtobeinblanketnon-compliancewithNRCreporting'procedures.ShouldRIIdisagreewithourinterpretationof"significant",wesuggestthatfurtherdiscussiontoclarifytheissuemaybeappropriate.

~.l If~r.~.cu+Vta>m,NIMBI,SLORIDA3llOI~lFLORIDAPOWER5LIGHTCO:.IPAiVNovember21,1975EBASCOSERVICES,INC.TwoRectorStreetNewYork,NewYork10006Attention:/.COMBUSTIONENGINEERINGP0.Box500Qindsor,CT06095Mr.L.Tsar.ris,ProjectManagerAttention:Mr.A.S.Janeson,ProjectManager(ST-IVCIEPLANTUNIT81-1974-890KfINSTALIKTIONUNIT82-1979-890KlEKTENSIONST.I.VCIEUNITf/2PSL2LPSIANDCONTAIN-hTSPP4YPlM'SPILES:CE-950-0775ANDNY-422527FL0-566,FF-860Gentlemen:P.L'sTurkeyPointnuclearunitsweusepumpsforResidualHeatRemovalervicewhichareofthesamebrand(I-R)andsimilarindesigntoPSL2JZSI"ndcontain-entspraypcs.Duringdisassembly'oftheTurkey?ointpumpsforsealmaintenanceitvasooservedonmorethanoneoccassionthattneimpellerlocking"..-arse-blyhadworkedloose.F?Ltack-weldedtheloc::nutassembliestoprecludethepossibilityofloosening.Indica"fonsfromthelocalI-Rrepresentativearethattheimpellerlocknutassemo'estobeuseca:?SL2arethesameasthosefurnishedatTurkeyPoint.PleaseobtainassurancefromI-Rthattheyvillprovideloc'Inputssecured=ytack-weldingorsomeothersatisfactorymethod.Alsosincetherewasconsiderab~edifficulgexperiencedvithgasketleakageatTurkey?Oi=tpleaseobtainfromI-Rassurancethatwevillnothavethisproblema"S=.Lucie2.Yoursverytruly,RLS/m=b'eeAttachment~vC.S.KentProjectManager6XO~-r,b,h;~'3q4ibIg M.'.Jameson0Ner21,1975RE:FLO-566,PF-860ccrcHraMr.Mr.Mr.Hr.Mr.Mr.Mr.Mr.Hr.Mr.Mr.Mr.Hr.Mr.Dr.Mr.Mr.Mr.C.B.AmosLouBorchardtG.E.CrowellR.A.DeLorenzoJ.D.DistelJ.H.Risher0.R.GrayK.N.HarrisR.W.KammannJ.L.LegierG.N.LemmonJ.E.RamondoW.H.Rogers,Jr.A.D.SchmditD.J.StephensR.E.UhrigJ.E.VesselyC.E.WaddellL.J.WeberN.T.Weems

'i-EPowerSystcins,,Combusr<onrngulcrrinrr,Inc.00Prosper.'rirlRoadsor.Ccnnccncut06095Tel203/063lgllTelex~JiJ2J7~pOVlf:-R~SYSTEMSApril6,1976L-CE-1328St.LuciePlantUnitNo.2-1978-890i'xtensionMr.C.S.KentEnrineeringProjectManagrFloridaPower&LightCo.P.O.Box3100Miami,Florida33101

SUBJECT: LPSIPFG'S

DearMr.Kent:

FP&LletterFF-860ofi".ovenber21,1975advisedC-EthatyouhadexperiencedontheTurkeyPointplantlooseningoftheimpellerlocknutassemblyont.hoIncrsoll-RandresidualheatrcrovalpumpsandBasketleakage,andrequestedancefromtheanufacturerthatthesesameproblemswouldnotoccurwithnit2LPSIandcontainmentspraypu=ps.Vehavetakenuuthisr.".atterwithIngersoll-Pand,thesupplieroftheLPSI~,pumpsi;ltheC-Esco"=,andt.ley)laveresponddtotheconcernaboutthelnce-nut.assembl"(butnotthegasketlea'kageproblem);two(2)cop'esoftheIn"ersoll-Randletterof"..arch23,1976areattachedforyourin.ormation.iewill"obacktoInnersol-:=--..dtodetertinewhatremedytlreyproposetoelitlinate~~~nigasketI::ak-epob".:.,atyoulravei"cedontheTurkeyPointpumpsan:willle'o-".owtheirresp=nsetothisotherconcernassoonaswereceiveit.Uerytrulyyours,ASJ/esEnclosurs(")CC:T.L.J.E.L.W.0~~~w/]D7'~-.i1R.S.".ntosuossoR=:"..senADDeLorenzoLcskovjanH.Roger,Jr.K.HarrisC.CrnwellC.W.DakinB.J.EscucJ.R.CindirR.W.KnmvinnnS.W."SrrablrryC.E.VnddellE.H.SrrrtrDP1~.leh)r';~~)~','.;(,'~"IsltI.I"'rot\"rlrArRvl~T'Ii':.r'.~gi~I'I~'.l~<Irr.ie:...r>>itsJ'>>:tl~r/Žz/A.S.JanesonProjectManagerF>.ar.co-e;va,er.T.crir-

0F Qt,'m~aD.aOH-I-.:km:~aDCCm~~~camvZZaft~san'PHILLLPSGURG,N.J.08bdSCombustionEngineering,Inc.IOOOProspectHillRoad)windsor,CT0609523MR76Attention:Mr.A.S.JamesonProjectllanagerSubject:FloridaPowerCLightSt.LucieUnitP2C.E.P.O.9500775LPSIPumpsI-RRef:OOI-35382Reference:(A)C.E.letterL-PCE-408datedl9DE75.entlemen:responsetoRef.(A)onshaft/impellerlockingnuts,I-Rnasin:esti-aatedseveraloccurrencesinwhichthelockingnutslo"senedandfnndthatthecauseswereeitherimproperinstallationafiermaintenanceoroperaio..oftheunitinwrongrotationwhi!cinstallingmtorlea"s.Toass'rethattheIo"kirgnutsareproperlyapplied,weareexpand!notheinst2IIa-:Ion/esse-."!yinsifutionstoclarifythisoprati"n.Inaddition,wearealsoinvestigatingoihermetho"sofpositivelylockirgthen.-stothes!.i-:toprevenloosning,Leanticip.tethaihism.thodwillDefinalizeintimeto"ei~pIementedonthepresentcontract.Ontheunitsinthe',.'-ICitisaccep.abletotackweldthetwonttstcge-,hea~e~i'heyarepro.-.e.-Jyinstaile"'.Properinstallationshouldbefotorquetheja-..nutintopla"ethenwhi!eholdingthejamnuttopre;antrotationtc"quathecap".tinoplace.'I'feapol"=i-=',orsuchala.eresponsebutasindicatedaBove,wewereun-awaren!a.-yseriousproblemspriortoyourletter.IftheP-"eanyqutions,pleasefeeIfrcctoconta"tthi",officnorourHartfor"~ranchofii..".C/2C/2r'eCom)ustIonEngineerIngAttn:lf.C.StnndinR.J.LandrigasI-Rllartford,C.Bricklcy(I)nnriant0hA~n(I)Very1rulyyourItiGERSOLL-Rh:<DCO'Ipi'.'!(~~/P7:'c~/tt.f.De.'tnrdoCamcronIluclearPun'ion l~4CC>>PYEBASCOSERVlCES.Its'Ol>OL+TCOFebruary3,1976SL-2-76-5wFile:HY-4R.P4p.sL-'/To?frCSKentEngineerirgPro)ectHnnagerFloridaPower6LightCompanyP0Box013100%hami,Florida33101ggcgLWvpstAgsl~1o)1',li~<gt>t~~Cuc'~<l..~~gi',t&aL.

Dear~frKent:

STLUCREPLPZiT1979-890llil(c)E'T25ION-Uil?TNO.2CO.'O'All~i".i.SPiXKYPZfPSRe:'r.u".'-~~'I>~~ipgfiReference:PALLetterFLO-566datedNovember2,875PuruanttoyourrcauestwehavebeenadvisedbyIngersoll-Rand(intheirletterofJanuary23,1976,acopyattached)thatasaresultoftnemessrcsund=rtaknt'.".eproblemofloosenin"oftheImpellernutsandgasketleakageasexperiencedonRlBPumpsatTurkeyPointStationvillnotberepeatDonStLucieUnit>>o.2ContainmentSprayPumps.i)PresentlyI/?isinvestigatingtheuseofotherathodstoensurethattheI=p'erlocknutdoesnotloosenitself.However,asamini"umthelocknutswillbeshop-tackvelded.ii)aaeproblemofgaslwtleakagehasbeenresolvedbyutili"ingnnEPT'0'inginlieuofaflatfibervasherbetweentheshaftandshaftsleeve.I/Rhasalsogivenassurancethatanymodificationsmadeinfuturetoimprovthedsinofthesetypeofpumpsvillalsobeusedinthede-signo=StLuciciso.2ContainmentSprayPumps.

~,Q/Q<')ppCSKentEBASCOSERVlCES2Peb~ry31976SL-2-76-54Wehotheaboveinfo~tfongillanswerallyourquestions.Shouldeopebrua201976.youdesireanyfurtherclarfficatfonpleaseadvisebyFeruaryVerytrulyyours,PJSgeeney,JrChiefHechanical-HuclearEnginerrAttachmentXH:lhcc:4HRogers,Jx(2)BZYnrfgCBIcosADSchmidtHD1!ant"KHHarris0ElGrayP.ADLoren=oJF.VesselyGCrogellLBorchardtLVsa~frisDJStephensJCP~~ondoJDDi"telGNLeamonT0HathisenSupervisingEngineer~y!JPPt