ML17229A090

Forwards SG Run Time Analysis for Cycle 14 of Plant,Unit 1, Which Includes Responses to NRC RAI Dtd 960726 & Util Contractor Repts Which Demonstrates That All Significant Parameters of Draft Reg Guide Have Been Met

ML17229A090
Person / Time
Site:	Saint Lucie
Issue date:	10/24/1996
From:	STALL J A FLORIDA POWER & LIGHT CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML17229A091	List: L-96-273, Forwards SG Run Time Analysis for Cycle 14 of Plant,Unit 1, Which Includes Responses to NRC RAI & Util Contractor Repts Which Demonstrates That All Significant Parameters of Draft Reg Guide Have Been Met ML17229A092 ML17229A093 ML17229A094 ML17229A095 ML17229A096 ML17229A097
References
L-96-273, NUDOCS 9610280062
Download: ML17229A090 (5)

Text

CATEGORY1REGUL'ATINFORMATION DISTRIBUTIOtSTEM (RIDE)ACCESSION NBR:961,0280062 DOC.DATE:

96/10/24NOTARIZED:

NODOCKETgFACIL:50-335 St.LuciePlant,Unit1,FloridaPower&LightCo.05000335AUTH.NAMEAUTHORAFFILIATION STALL,"J.A.

FloridaPower6LightCo.RECIP.NAME RECIPIENT AFFILIATION DocumentControlBranch(Document ControlDesk)

SUBJECT:

Forwardsencldemonstrating thatallsignificant parameters ofDraftRegGuide,Steame Generator TubeIntegrity,met for14monthsofoperation, whiletoplevelcriterion remainslessthan0.05for15monthperiodofoperation.

DISTRIBUTION CODE:AOOIDCOPIESRECEIVED:LTR JENCLISIZE:+ZTITLE:ORSubmittal:

GeneralDistribution NOTES:RECIPIENT IDCODE/NAME PD2-3LA.WIENSFL.

COPIESLTTRENCL1111RECIPIENT IDCODE/NAME PD2-3PDCOPIESLTTRENCL11RINTERNAL:

ACRSNRR/DE/EMCB NRR/DSSA/SPLB NUDOCS-ABSTRACT EXTERNAL:

NOAC1~111111111NRR/DRCH/HICB NRR/DSSA/SRXB OGC/HDS3NRCPDR1111111011D0UNNOTETOALLNRIDS"RECIPIENTS:

PLEASEHELPUSTOREDUCEWASTE.TOHAVEYOURNAMEORORGANIZATION REMOVEDFROMDISTRIBUTION LISTSORREDUCETHENUMBEROFCOPIESRECEIVEDBYYOUORYOURORGANIZATION, CONTACTTHEDOCUMENTCONTROLDESK(DCD)ONEXTENSION 415-2083TOTALNUMBEROFCOPIESREQUIRED:

LTTR13ENCL12 FloridaPower8tLightCompany,P.O.Box128,FortPierce,FL34854-0128 October24,1996L-96-27310CFR50.4U.S.Ihluclear Regulatory Commission Attn:DocumentControlDeskWashington, D.C.20555RE:St.LucieUnit1DocketNo.50-335SteamGenerator RunTimeAnalsisforCcle14DuringaJuly3,1996,meetingwiththeNRC,FloridaPowerandLightCompany(FPL)committed toprovidetheresultsoftheSt.LucieUnit1steamgenerator runtimeanalysistotheNRCwithin90daysofthestartupfromthe1996refueling outage(SL1-14).

FPLplanstooperatetheUnit1steamgenerators forfifteen(15)monthsthroughOctober23,1997.Theruntimeanalysisisaphysically basedanalysisusingtheguidancecontained inDraftRegulatory Guide(RG)1.121,GenericLetter95-05,andtheDraftRegulatory Guide,SteamGenerator TubeIntegrity.

Thefifteen(15)monthoperating cyclerepresents aseven(7)monthreduction intheoriginally scheduled cycleoftwenty-two (22)months.Thisrevisedoperating cyclelengthwillpermitthesafeoperation ofthesteamgenerators untiltheearliestdatefortheinstallation ofthereplacement steamgenerators.

Enclosure 1istheSt.LucieUnit1SteamGenerator RunTimeAnalysisforCycle14.Thisruntimeanalysisincludestheresponses totheNRCrequestsforadditional information datedJuly26,1996.Enclosures 2,3,and4areFPLcontractor reportswhicharereferenced inthesteamgenerator runtimeanalysis.

Enclosure 2isAPTECHEngineering ServicesReport,AES96052749-1-1, datedOctober1996,AnalysisofODSCC/IGA atTubesheet andTubeSupportLocations atSt.LucieUnitl.Enclosure 3isScientific Applications International Corporation (SAIC)Report,SAIC05-5049-05-6734-500, datedSeptember 1996,SteamGenerator Degradation SpecificManagement (SGDSM)LeakageLimitCalculation forSt.LucieUnit1.Enclosure 4isABBCombustion Engineering Report,00000-OSW-16 Revision0,In-situPressureTestResultsforSt.LucieUnit1Spring1996Outage.Theenclosures demonstrate thatallofthesignificant parameters-of theDraftRegulatory Guide,SteamGenerator TubeIntegrity, havebeenmetforfourteen(14)monthsofoperation, whilethetoplevelcriterion (probability ofburst(POB)atmainsteamlinebreakconditions) remainslessthan0.05forthefifteen(15)monthperiodofoperation.

Aprobabilistic safetyassessment (PSA)demonstrates thatoperation fortheadditional monthdoesnotincreasethecoredamagefrequency (CDF)intothesafetysignificant category.

Theinclusion oftheEPRIprimarytosecondary leakguidelines inplantoperating procedures andincreased trainingofthelicensedoperators, asdocumented intheenclosures, providesFPL'scommitment torespondtopossibletubeleakevents.Anadditional benchmark oftheplannedcyclelengthisprovidedbytheendofCycle13in-situpressuretesting.Thistestingdemonstrated thatsteamgenerator tubeswithrepresentative worstcasedefectsmettherequirements ofDraftRG1.121r~R()gpf'ter13.9effective fullpowermonths(EFPM)ofoperation.

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05000335, O'""'DR

~yeslJ1 S;.LucieUnit1DocketNo,50-335L-96-273Page2Insummary,FPLconsiders thatsafeoperation oftheSt.LucieUnit1steamgenerators forfifteen(15)monthsthroughOctober23,1997,issupported bytheenclosedruntimeanalysis, theendofCycle13repairsandin-situpressuretesting,theincorporation ofmorerestrictive operational tubeleakagelimits,andtheenhancedoperatortraining.

Asdiscussed attheJuly3,1996meeting,FPLispreparedtomeetwiththeNRCtodiscusstheresultsoftheanalysesoncetheNRCStaffhashadanopportunity toreviewthismaterial.

VetyoursJ.A.StallVicePresident St.LuciePlantJAS/GRMEnclosures (4)cc:StewartD.Ebneter,RegionalAdministrator, RegionII,USNRCSeniorResidentInspector, USNRC,St.LuciePlant

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