ML17222A278

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Responds to Generic Ltr 88-05 Re Boric Acid Corrosion of Carbon Steel Reactor Pressure Boundary Components.Principle Locations Where Leakage Could Degrade RCS Pressure Boundary Will Be Identified & Included in New Procedure
ML17222A278
Person / Time
Site: Saint Lucie  NextEra Energy icon.png
Issue date: 05/31/1988
From: CONWAY W F
FLORIDA POWER & LIGHT CO.
To:
NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
References
GL-88-05, GL-88-5, L-88-244, NUDOCS 8806100130
Download: ML17222A278 (8)


Text

ACCEiZRATED IHS%1BUTIDN DEMONSTRATION SYSTEMREGULATORY INFORMATION DISTRIBUTION SYSTEM(RIDS)ACCESSION NBR:8806100130 DOC.DATE:

88/05/31NOTARIZED:

NOFACIL:50-335 St.LuciePlant,Unit1,FloridaPower6LightCo.50-389St.LuciePlant,Unit2,FloridaPower6LightCo.AUTH.NAMEAUTHORAFFILIATION CONWAY,W.F.

FloridaPower&LightCo.RECIP.NAME RECIPIENT AFFILIATION DocumentControlBranch(Document Control.Desk)

SUBJECT:

RespondstoGenericLtr88-05reboricacidcorrosion ofcarbonsteelreactorpressureboundarycomponents.

DISTRIBUTION CODE:A001DCOPIESRECEIVED:LTR JENCL/SIZE:TITLE:ORSubmittal:

GeneralDistribution NOTES:DOCKET05000335" 05000389"'

nRRECIPIENT IDCODE/NAME PD2-2LATOURIGNY,E IINTERNAL:

ACRSNRR/DEST/ADS7ENRR/DEST/ESB 8DNRR/DEST/RSB 8ENRR/PMAS/ILRB12 OGC15-B-18RES/DE/EIB COPIESLTTRENCL101166111111111011ARM/DAF/LFMB NRR/DEST/CEB 8HNRR/DEST/MTB 9HNRR/DOEA/TSB llNUDOCS-ABSTRACT 01101111111111,RECIPIENT

'COPIES",

IDCODE/NAME LTTRENCLPD2-2PD55IAEXTERNAL:

LPDRNSIC1111NRCPDR11DDTOTALNUMBEROFCOPIESREQUIRED:

LTTR28ENCL25/

4i,I'f P.X14000,JUNOBEACH,FL33408.0420

+4Lll~@$531$88L-88-244U.S.NuclearRegulatory Commission Attn:DocumentControlDeskWashington, D.C.20555Gentlemen:

Re:St.LucieUnits1and2DocketNos.50-335and50-389BoricAcidCorrosion ofCarbonSteelReactorPressureBoundarComonentsinPWRPlantsGenericLetter88-05ByletterdatedMarch17,1988,theNRCforwarded toalloperating pressurized waterreactors(PWRs)theabovereferenced genericletter(GL).InthatGLtheNRCstatedthatitwasrequesting information toassesssafeoperation ofPWRswhenreactorcoolantleaksbelowtechnical specification limitsdevelopandthecoolantcontaining dissolved boricacidcomesincontactwithand.,degradeslowalloycarbonsteelcomponents.

Tothisend,theNRCrequested assurances thataprogramhasbeenimplemented consisting ofsystematic measurestoensurethatboricacidcorrosion doesnotleadtodegradation ofthereactorcoolantpressureboundary.

FPL'sresponsetoGL88-05forSt.LuciePlantisattached.

Ifadditional information isrequired, pleasecontactus.Verytrulyyours,W.F.CoaySeniorVicePresident

-NuclearWFC/EJW/gp Attachment cc:Dr.J.NelsonGrace,RegionalAdministrator, RegionII,USNRCSeniorResidentInspector, USNRC,St.LuciePlantEJW88-05.GL 8806100i30 88053iPDRADQCK05000335PDCDanFPLGroupcompany STATEOFFLORIDA))stCOUNTYOFPALMBEACH)W.F.Conwabeingfirstdulysworn,deposesandsays:ThatheisSeniorVicePresident

-Nuclear,ofFloridaPowerandLightCompany,theLicenseeherein;Thathehasexecutedtheforegoing document; thatthestatements madeinthisdocumentaretrueandcorrecttothebestofhisknowledge, information andbelief,andthatheisauthorized toexecutethedocumentonbehalfofsaidLicensee.

W.F.CSubscribed andsworntobeforemethisdayof,HOTLYPUBLIC,inandforCountyofPalmBeach,StateofFloridaNotaryPublic,StateofRoridaQyCommission ExpiresJunel,1989'y;COrimiSSiOn eXpireSgoadedrhruTroyrara~ln5alaaca

lac, 4tJSCC,'-i'~Jj'

~'vATTACHMENT GL88-05PROGRAMInresponsetoGenericLetter88-05St.LuciePlantisrevisingitsprogramfordealingwithReactorCoolantSystem(RCS)leaks.Currently, St.Lucieperformsleakinspections aftertheRCShasbeenopenedformaintenance orforrefueling.

Thisprogramwillbeexpandedtoincludeinspections thatmaybedoneatpowerorafterreactortrips.Aprocedure willbewrittentoimplement theseadditional inspections andisexpectedtobeinplacebyJuly15,1988.Responses for,thespecificgenericletteritemsareasfollows:Theprogramshouldincludeadetermination oftheprincipal locations where,leaksthataresmallerthantheallowable technical specification limitcancausedegradation oftheprimarypressureboundarybyboricacidcorrosion.

Particular consideration shouldbegiventoidentifying thoselocations whereconditions existthatcouldcausehighconcentrations ofboricacidonpressureboundarysurfaces.

ResponseITheprinciple locations whereleakagecoulddegradetheRCSpressureboundarywillbeidentified.

Theselocations willbeincludedinthenewprocedure.

2~Theprogramshouldincludeprocedures forlocatingsmallcoolantleaks(i.e.,leakageratesatlessthantechnical specifications limits).Itisimportant toestablish thepotential pathoftheleakingcoolantandthereactorpressureboundarycomponents itislikelytocontact.Thisinformation isimportant indetermining theinteraction betweentheleakingcoolantandreactorcoolantpressureboundarymaterials.

ResponseTheprocedure willincludeactionstobetakenintheeventofanindication ofanRCSleak(e.g.,sumplevel,flow,leakrate)inconjunction withanunexplained increaseincontainment airborneactivity.

Areassusceptible toboricacidcorrosion willbeidentified.

EJW88-05.GL 3.Theprogramshouldincludemethodsforconducting examinations andperforming engineering evaluations toestablish theimpactonthereactorcoolantpressureboundarywhenleakageislocated.Thisshouldincludeprocedures topromptlygatherthenecessary information foranengineering evaluation beforetheremovalofevidenceofleakage,suchasboricacidcrystalbuildup.ResponseAnexamination methodwillbeprovidedintheaboveprocedure.

Itwillcontainthenecessary requirements (leakrates,temperatures, pressures, boricacidsamples,affectedequipment, etc.)forengineering evaluations.

Engineering procedures currently existwhichprovideforevaluations ofnon-conformances suchasthosewhichmightresultfromRCSleaks.4~Theprogramshouldincludecorrective actionstopreventrecurrences ofthistypeofcorrosion.

Thisshouldincludeanymodifications tobeintroduced inthepresent.designoroperating procedures oftheplantthat(a)reducetheprobability ofprimarycoolantleaksatthelocations wheretheymaycausecorrosion damageand(b)entailtheuseofsuitablecorrosion resistant materials ortheapplication ofprotective coatings/cladding.

ResponseCorrective actionsarecoveredundercurrentplantprocedures.

Consideration ofdesignchangeswillbedoneonacase-by-case basis.EJW88-05.GL 4-~0r~)