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| {{#Wiki_filter:CATEGORY1REGULATORINFORMATIONDISTRIBUTION.STEM(RIDS)ACCESSIONNBR:9605150395DOC.DATE:96/05/14NOTARIZED:NOFACIL:50-335St.LuciePlant,Unit1,FloridaPower6Light,Co.AUTH.NAMEAUTHORAFFILIATIONBOHLKE,W.H.FloridaPoweraLightCo.RECIP.NAMERECIPIENTAFFILIATIONDocumentControlBranch(DocumentControlDesk) | | {{#Wiki_filter:CATEGORY1REGULATOR INFORMATION DISTRIBUTION |
| | .STEM(RIDS)ACCESSION NBR:9605150395 DOC.DATE: |
| | 96/05/14NOTARIZED: |
| | NOFACIL:50-335 St.LuciePlant,Unit1,FloridaPower6Light,Co.AUTH.NAMEAUTHORAFFILIATION BOHLKE,W.H. |
| | FloridaPoweraLightCo.RECIP.NAME RECIPIENT AFFILIATION DocumentControlBranch(Document ControlDesk) |
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| ForwardssupplementalinforeSGtubeinspforUnitl.DISTRIBUTIONCODE:A001DCOPIESRECEIVED:LTRENCLSIZE:TITLE:ORSubmittal:GeneralDistributionDOCKETI05000335NOTESRECIPIENTIDCODE/NAMEPD2-3LAWIENSiL.,COPIESRECIPIENTLTTRENCLIDCODE/NAME11PD2-3PD11COPIESLTTRENCL11INTERNAL:ACRSNRR/DE/EMCBNRR/DSSA/SPLBNUDOCS-ABSTRACTEXTERNAL:NOAC6611111111F&CENTER1RCBNRR/DSSA/SRXBOGC/HDS3NRCPDRDCUMNNOTETO,ALL"RIDS"RECIPIENTS:PLEASEHELPUSTOREDUCEWASTE!CONTACTTHEDOCUMENTCONTROLDESK,ROOMOWFNSD-5(EXT.415-2083)TOELIMINATEYOURNAMEFROMDISTRIBUTIONLISTSFORDOCUMENTSYOUDON'TNEED!TOTALNUMBEROFCOPIESREQUIRED:LTTR,.18.ENCL:17 Y4Ag~4AJ~~
| | Forwardssupplemental inforeSGtubeinspforUnitl.DISTRIBUTION CODE:A001DCOPIESRECEIVED:LTR ENCLSIZE:TITLE:ORSubmittal: |
| ~~)ll~VIFloridaPower5LightCompany,P.O.Box128,FortPierce,FL34954-0128May14,1996L-96-12910CFR50.4U.S.NuclearRegulatoryCommissionAttn:DocumentControlDeskWashington,D.C.20555RE:St.LucieUnit1DocketNo.50-335SupplementalInformationSteamGeneratorTubeInsectionDuringatelephoneconversationonMay7,1996,theNRCstaffidentifiedseveralconcernswithrespecttothestructuralandleakintegrityofsteamgeneratortubeindicationsidentifiedbyFloridaPowerandLightCompany(FPL),inthesludgepile,ateggcratesupports,andatdrilledtubesupportplates.SeveraloftheseconcernswereidentifiedasaresultofameetingwithNRConApril22,1996,whenFPLdiscussed,inpart,thesteamgeneratortubeintegrityprogramforSt.LucieUnit1.Theinformationrequestedduring,thephonecallisattached.Pleasecontactusifthereareanyquestionsaboutthissubmittal.Verytrulyyours,W.H.BohlkeVicePresidentSt.LuciePlantWHB/GRMAttachmentcc:StewartD.Ebneter,RegionalAdministrator,RegionII,USNRCSeniorResidentInspector,USNRC,St.LuciePlant96051503959605i47PDRADQCK050003356LPDRIIanFPLGroupcompany | | GeneralDistribution DOCKETI05000335NOTESRECIPIENT IDCODE/NAME PD2-3LAWIENSiL., |
| ~~~hi,p1 St.LucieUnit1DocketNo.50-335L-96-129AttachmentPage1Forindicationsattheeggcratesupportplatesandinthesludgepile:NRCREQUEST1.Fortheplannedin-situpressuretestingofthemostsignificantflaws,provideinformationontheadjustmentstothetestpressuretoaccountfor(1)temperaturedifferencesbetweenoperatingconditionsandthetest,(2)materialproperties,and(3)lockedtubesupportplateconditions.Providethecriteriatobeusedforselectingthetubestobein-situpressuretested,thenumberoftubesthatwillbetested,andtheprocedureforthetest(e.g.,withorwithoutareinforcingbladder).DuetoNRCstaffconcernsregardingtheabilitytodepthsizethesetypesofindications,providethebasisforconcluding.thatyouwillselectthetubeswiththemostsignificantflaws.FPLRESPONSEFPLwillusein-situpressuretestingtoverifythestructuraladequacyofthemostsignificanteddycurrenttest(ECT)indicationsatdrilledsupportplate,freespan,eggcratesandsludgepilelocations.FPLwillinitiallyconductin-situpressuretestingwithoutaburstbladdertoassessleakageintegrity.Leakage,ifobserved,willbemeasuredatnormaloperatingdifferentialpressureandathigherpressures.Ifleakageexceedsmakeupcapacity,theburstbladderwillthenbeinstalledtoachievethedesiredtestpressures.Tubeselectionforin-situpressuretestingwillbeconductedbyleadECTdataanalysisandengineeringpersonnel.SelectioncriteriawillbebasedonreviewofECTdataforavarietyofflawcharacteristicsincludinglength,maximumdepth,averagedepth,voltage(amplitude),location,potentialfortubesupportlock-up,numberofflawsinatube,andflawgrowthrate.Duetothevarietyofflawcharacteristicsinvolved,analyticaljudgmentandevaluationexperienceisrequiredforassessingtheseverityofflawsindications. | | COPIESRECIPIENT LTTRENCLIDCODE/NAME 11PD2-3PD11COPIESLTTRENCL11INTERNAL: |
| 'h,I St.LucieUnit1DocketNo.50-335L-96-129AttachmentPage2Selectionofflawindicationsforin-situpressuretestingwillbebasedonbobbincoilinspectiontechniquesthatarequalifiedfordetectionanddepthsizingofintergranularattack/stresscorrosioncracking(IGA/SCC)ateggcratesupports,freespanandsludgepilelocations.CandidateindicationswillalsobeinspectedwithMRPCtechniquestoassesstheflawcharacteristicsdiscussedabove.Candidateindicationsforin-situpressuretestingatdrilledsupportplatelocationswillalsobeinspectedbybobbincoilandMRPCtechniques.Selectionofcandidateindicationsatdrilledsupportplatelocationswillrelyonacombinationofdepthandvoltageinformationaswellastheotherflawcharacteristicsdiscussedabove.Adjustmentstoin-situtestpressurewillincludea13%increasefortemperaturebasedonbursttestingof3/4inchby0.048inchAlloy600tubesamplesatoperatingandroomtemperatures.Testpressureforcircumferentialflawsatthetubeexpansiontransitionwillalsobeincreasedby8.5%forlockedsupportplateconditionsbasedona40inchspanbetweenthetubesheetandthefirsteggcratesupport.Theadjustedpressuresare:FlawADJUSTEDOrientationNOPD/PAxial1622psiCircumferential1744psiADJUSTED1.4xSLBD/P3955psi4253psiADJUSTED3xNOPD/P4865psi5231psiNOPD/PTubedifferentialpressureatnormaloperatingsystempressures.NOPD/P=1435psi.SLBD/P'ubedifferentialpressureduringSteamlinebreak.SLBD/P=2500psi.In-situpressuretestingofflawedsteamgeneratortubingisbecomingarelativelycommonindustrypractice.Industryexperiencewithin-situpressuretestinghasbeenpositiveintermsofassuringthatadequatestructuralmarginsexist.FPLwillusefieldprovenequipmentandexperiencedpersonnelforin-situpressuretesting.Between10and20ofthemostsignificantindicationsfromalllocations(eggcrate,sludgepile,drilledsupportplate,orfreespan)willbein-situ St.LucieUnit1DocketNo.50-335L-96-129AttachmentPage3pressuretested.In-situpressuretestresultsareexpectedtodemonstratethatconservativemarginsforstructuralintegrityareprovidedutilizingtheECTdepthsizingtechniques.REQUEST2.Giventhestaffconcernsregardingthedepthsizingtechnique,provideadiscussionofthefeasibilityof,andanyplansyouhave,forperformingheliumleaktestingtoconfirmthatnothrough-wallcracksarepresent.Thisactionwouldprovidesupportinginformationthatindicationssizedlessthan100%through-wallareinfactlessthan100%through-wallprovidednoleakagewasdetectedforthesetubes.Thistestalsohasthepotentialtopermittheidentificationofthesourceofanyprimary-to-secondaryleakageobservedduringthelastcycle(e.g.,ifleakageisattributedtoaplug,thistestmayprovideadditionalconfidencethatalltheleakageisfromtheplug).FPLRESPONSEFPLhasreviewedheliumleakdetectioneffortswithaleakdetectionvendorandseveralutilities.Themajorityofleakdetectioneffortswithheliumhavebeenforleakageinexcessof50gallonsperday(gpd).LeakageatSt.LucieUnit1isestimatedat2-4gpd.Theuseofheliumleaktestingforleakagewhichislessthan5gpdisextremelylimitedandisnotexpectedtobeeffective.Also,heliumtestingisnotexpectedtoidentifyleakagethroughaperforatedtubewhichcontainsaleakingtubeplugduetothecolumnofwaterwhichistypicallypresentabovetheplug.Further,thedifficultyinmaintainingapositivepressurewithheliumonthesecondarysystemmakesthistestdifficulttoimplement.TheFPLapproachincludesextensiveinspections,in-situpressuretestingandimprovedon-lineleakagemonitoringatSt.LucieUnit1.FPLbelievesthatheliumleaktestingwillprovidelittleornobenefitbeyondtheinformationandinsightprovidedbytheothertechniquesbeingemployed.NRCREQUEST3.Provideyourplansandscheduleforperforminganestimateoftheconditionalprobabilityofburstgivenamainsteamline | | ACRSNRR/DE/EMCB NRR/DSSA/SPLB NUDOCS-ABSTRACT EXTERNAL: |
| | NOAC6611111111F&CENTER1RCBNRR/DSSA/SRXB OGC/HDS3NRCPDRDCUMNNOTETO,ALL"RIDS"RECIPIENTS: |
| | PLEASEHELPUSTOREDUCEWASTE!CONTACTTHEDOCUMENTCONTROLDESK,ROOMOWFNSD-5(EXT. |
| | 415-2083) |
| | TOELIMINATE YOURNAMEFROMDISTRIBUTION LISTSFORDOCUMENTS YOUDON'TNEED!TOTALNUMBEROFCOPIESREQUIRED: |
| | LTTR,.18.ENCL:17 Y4Ag~4AJ~~ |
| | ~~)ll~VIFloridaPower5LightCompany,P.O.Box128,FortPierce,FL34954-0128 May14,1996L-96-12910CFR50.4U.S.NuclearRegulatory Commission Attn:DocumentControlDeskWashington, D.C.20555RE:St.LucieUnit1DocketNo.50-335Supplemental Information SteamGenerator TubeInsectionDuringatelephone conversation onMay7,1996,theNRCstaffidentified severalconcernswithrespecttothestructural andleakintegrity ofsteamgenerator tubeindications identified byFloridaPowerandLightCompany(FPL),inthesludgepile,ateggcratesupports, andatdrilledtubesupportplates.Severaloftheseconcernswereidentified asaresultofameetingwithNRConApril22,1996,whenFPLdiscussed, inpart,thesteamgenerator tubeintegrity programforSt.LucieUnit1.Theinformation requested during,thephonecallisattached. |
| | Pleasecontactusifthereareanyquestions aboutthissubmittal. |
| | Verytrulyyours,W.H.BohlkeVicePresident St.LuciePlantWHB/GRMAttachment cc:StewartD.Ebneter,RegionalAdministrator, RegionII,USNRCSeniorResidentInspector, USNRC,St.LuciePlant9605150395 9605i47PDRADQCK050003356LPDRIIanFPLGroupcompany |
| | ~~~hi,p1 St.LucieUnit1DocketNo.50-335L-96-129Attachment Page1Forindications attheeggcratesupportplatesandinthesludgepile:NRCREQUEST1.Fortheplannedin-situpressuretestingofthemostsignificant flaws,provideinformation ontheadjustments tothetestpressuretoaccountfor(1)temperature differences betweenoperating conditions andthetest,(2)materialproperties, and(3)lockedtubesupportplateconditions. |
| | Providethecriteriatobeusedforselecting thetubestobein-situpressuretested,thenumberoftubesthatwillbetested,andtheprocedure forthetest(e.g.,withorwithoutareinforcing bladder). |
| | DuetoNRCstaffconcernsregarding theabilitytodepthsizethesetypesofindications, providethebasisforconcluding. |
| | thatyouwillselectthetubeswiththemostsignificant flaws.FPLRESPONSEFPLwillusein-situpressuretestingtoverifythestructural adequacyofthemostsignificant eddycurrenttest(ECT)indications atdrilledsupportplate,freespan,eggcrates andsludgepilelocations. |
| | FPLwillinitially conductin-situpressuretestingwithoutaburstbladdertoassessleakageintegrity. |
| | Leakage,ifobserved, willbemeasuredatnormaloperating differential pressureandathigherpressures. |
| | Ifleakageexceedsmakeupcapacity, theburstbladderwillthenbeinstalled toachievethedesiredtestpressures. |
| | Tubeselection forin-situpressuretestingwillbeconducted byleadECTdataanalysisandengineering personnel. |
| | Selection criteriawillbebasedonreviewofECTdataforavarietyofflawcharacteristics including length,maximumdepth,averagedepth,voltage(amplitude), |
| | : location, potential fortubesupportlock-up,numberofflawsinatube,andflawgrowthrate.Duetothevarietyofflawcharacteristics |
| | : involved, analytical judgmentandevaluation experience isrequiredforassessing theseverityofflawsindications. |
| | 'h,I St.LucieUnit1DocketNo.50-335L-96-129Attachment Page2Selection offlawindications forin-situpressuretestingwillbebasedonbobbincoilinspection techniques thatarequalified fordetection anddepthsizingofintergranular attack/stress corrosion cracking(IGA/SCC) ateggcratesupports, freespanandsludgepilelocations. |
| | Candidate indications willalsobeinspected withMRPCtechniques toassesstheflawcharacteristics discussed above.Candidate indications forin-situpressuretestingatdrilledsupportplatelocations willalsobeinspected bybobbincoilandMRPCtechniques. |
| | Selection ofcandidate indications atdrilledsupportplatelocations willrelyonacombination ofdepthandvoltageinformation aswellastheotherflawcharacteristics discussed above.Adjustments toin-situtestpressurewillincludea13%increasefortemperature basedonbursttestingof3/4inchby0.048inchAlloy600tubesamplesatoperating androomtemperatures. |
| | Testpressureforcircumferential flawsatthetubeexpansion transition willalsobeincreased by8.5%forlockedsupportplateconditions basedona40inchspanbetweenthetubesheet andthefirsteggcratesupport.Theadjustedpressures are:FlawADJUSTEDOrientation NOPD/PAxial1622psiCircumferential 1744psiADJUSTED1.4xSLBD/P3955psi4253psiADJUSTED3xNOPD/P4865psi5231psiNOPD/PTubedifferential pressureatnormaloperating systempressures. |
| | NOPD/P=1435psi.SLBD/P'ubedifferential pressureduringSteamlinebreak.SLBD/P=2500psi.In-situpressuretestingofflawedsteamgenerator tubingisbecomingarelatively commonindustrypractice. |
| | Industryexperience within-situpressuretestinghasbeenpositiveintermsofassuringthatadequatestructural marginsexist.FPLwillusefieldprovenequipment andexperienced personnel forin-situpressuretesting.Between10and20ofthemostsignificant indications fromalllocations (eggcrate, sludgepile,drilledsupportplate,orfreespan)willbein-situ St.LucieUnit1DocketNo.50-335L-96-129Attachment Page3pressuretested.In-situpressuretestresultsareexpectedtodemonstrate thatconservative marginsforstructural integrity areprovidedutilizing theECTdepthsizingtechniques. |
| | REQUEST2.Giventhestaffconcernsregarding thedepthsizingtechnique, provideadiscussion ofthefeasibility of,andanyplansyouhave,forperforming heliumleaktestingtoconfirmthatnothrough-wall cracksarepresent.Thisactionwouldprovidesupporting information thatindications sizedlessthan100%through-wall areinfactlessthan100%through-wall providednoleakagewasdetectedforthesetubes.Thistestalsohasthepotential topermittheidentification ofthesourceofanyprimary-to-secondary leakageobservedduringthelastcycle(e.g.,ifleakageisattributed toaplug,thistestmayprovideadditional confidence thatalltheleakageisfromtheplug).FPLRESPONSEFPLhasreviewedheliumleakdetection effortswithaleakdetection vendorandseveralutilities. |
| | Themajorityofleakdetection effortswithheliumhavebeenforleakageinexcessof50gallonsperday(gpd).LeakageatSt.LucieUnit1isestimated at2-4gpd.Theuseofheliumleaktestingforleakagewhichislessthan5gpdisextremely limitedandisnotexpectedtobeeffective. |
| | Also,heliumtestingisnotexpectedtoidentifyleakagethroughaperforated tubewhichcontainsaleakingtubeplugduetothecolumnofwaterwhichistypically presentabovetheplug.Further,thedifficulty inmaintaining apositivepressurewithheliumonthesecondary systemmakesthistestdifficult toimplement. |
| | TheFPLapproachincludesextensive inspections, in-situpressuretestingandimprovedon-lineleakagemonitoring atSt.LucieUnit1.FPLbelievesthatheliumleaktestingwillprovidelittleornobenefitbeyondtheinformation andinsightprovidedbytheothertechniques beingemployed. |
| | NRCREQUEST3.Provideyourplansandscheduleforperforming anestimateoftheconditional probability ofburstgivenamainsteamline |
| ''!) | | ''!) |
| IIj1(~~St.LucieUnit1DocketNo.50-335L-96-129AttachmentPage4breakgiventhenumberofindications,themaximumgrowthrateobserved,andtheeddycurrentuncertainties.FPLRESPONSEFPLwillperformacalculationfortheprobabilityoftubeburstbasedontheAPTECHEngineeringmodelofthePaloVerdeSteamgenerator.Thiscalculationwill'valuatetheas-leftconditionoftheSt.LucieUnit1steamgeneratorsandprojecttheendofthenextcycleconditionsbasedonthenumberofindications,growthratesandeddycurrentuncertaintiesforalllocationsinthesteamgenerator.Thecalculationoftubeburstprobabilitywillbesubmittedapproximately6monthsafterstartupfromthecurrentrefuelingoutage(SL1-14).NRCREQUEST4.Provideyourcriteriafordeterminingwhetherornotamid-cycleinspectionisnecessaryasaresultofeddycurrenttesting,in-situpressuretesting,heliumleaktesting,andconditionalprobabilityofburst(e.g.,1E-2),asappropriate.FPLRESPONSETheECTinspectiondataforalllocationsinthesteamgeneratorwillbethebasisfortheassessmentoftheneedforamid-cycleinspection.Thefactorsconsideredwillincludein-situpressuretestresultsandtheprobabilityofburstcalculationconservativelyestimatedbasedonECTexaminationresults.Acalculatedprobabilityoftubeburstsubstantiallygreaterthan1X10willbeconsideredasinputtotheneedforamid-cycleinspection.NRCREQUEST5.ProvideyourplanswithrespecttonotifyingthestaffifanyindicationwouldnotbeabletowithstandtheloadingspecifiedinDraftRegulatoryGuide1.121.Thisshouldaddressreportingindicationswhoselengthexceedsthecriticallengthassuminga100%through-wallflaw.andindicationswhosedepthexceedsthecriticaldepthassuminganinfinitelylongflaw. | | IIj1(~~St.LucieUnit1DocketNo.50-335L-96-129Attachment Page4breakgiventhenumberofindications, themaximumgrowthrateobserved, andtheeddycurrentuncertainties. |
| | FPLRESPONSEFPLwillperformacalculation fortheprobability oftubeburstbasedontheAPTECHEngineering modelofthePaloVerdeSteamgenerator. |
| | Thiscalculation will'valuate theas-leftcondition oftheSt.LucieUnit1steamgenerators andprojecttheendofthenextcycleconditions basedonthenumberofindications, growthratesandeddycurrentuncertainties foralllocations inthesteamgenerator. |
| | Thecalculation oftubeburstprobability willbesubmitted approximately 6monthsafterstartupfromthecurrentrefueling outage(SL1-14). |
| | NRCREQUEST4.Provideyourcriteriafordetermining whetherornotamid-cycle inspection isnecessary asaresultofeddycurrenttesting,in-situpressuretesting,heliumleaktesting,andconditional probability ofburst(e.g.,1E-2),asappropriate. |
| | FPLRESPONSETheECTinspection dataforalllocations inthesteamgenerator willbethebasisfortheassessment oftheneedforamid-cycle inspection. |
| | Thefactorsconsidered willincludein-situpressuretestresultsandtheprobability ofburstcalculation conservatively estimated basedonECTexamination results.Acalculated probability oftubeburstsubstantially greaterthan1X10willbeconsidered asinputtotheneedforamid-cycle inspection. |
| | NRCREQUEST5.Provideyourplanswithrespecttonotifying thestaffifanyindication wouldnotbeabletowithstand theloadingspecified inDraftRegulatory Guide1.121.Thisshouldaddressreporting indications whoselengthexceedsthecriticallengthassuminga100%through-wall flaw.andindications whosedepthexceedsthecriticaldepthassuminganinfinitely longflaw. |
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| St.LucieUnit1DocketNo.50-335L-96-129AttachmentPage5FPLRESPONSEFPLwillinformtheNRCprojectmanagerforSt.LucieUnits1and2,viatelephone,oftheprogressoftheinspectionsaftertheyareapproximately50%,75%and100$complete.FPLwilldiscussthegeneralstateoftheinspection,thenumberandsizeoftheindicationsandcandidateindicationsforin-situpressuretesting.TheNRCprojectmanagerwasupdatedbyphoneon5/13/96atapproximately25%completion.Resultsfromthein-situpressuretestswillbeprovided,viatelephone,within24hoursofcompletionofthein-situtestprogram.NRCREQUEST6.Discussyourplanswithrespecttosubmittingasummaryoftheinspectionresultsandtheabovementionedheliumandin-situpressuretestresults.FPLRESPONSEResultsfromtheeddycurrentinspectionswillbesubmittedaspartofthespecialreportrequiredbyTechnicalSpecification4.4.5.5.b.Theresultsfromthein-situpressuretestingwillbesubmittedwithin10daysofcompletionofthein-situtestprogram.ZZ.Forindicationsatthedrilledholetubesupportplateswhichyouplantosizeandleaveinservice:NRCREQUESTa.Discussthequalificationdatatosupporttheabilitytosizethetypesofindicationsthatwillremaininservice(e.g.,volumetricindications).Includethetubepulldataorothertestdatathatconfirmsthatthemorphologyofthequalificationdataisconsistentwiththemorphologyoftheindicationsinthefield. | | St.LucieUnit1DocketNo.50-335L-96-129Attachment Page5FPLRESPONSEFPLwillinformtheNRCprojectmanagerforSt.LucieUnits1and2,viatelephone, oftheprogressoftheinspections aftertheyareapproximately 50%,75%and100$complete. |
| )~%'I St.LucieUnit1DocketNo.50-335~,L-96-129AttachmentPage6FPLRESPONSEQualificationdatafordetectionandsizingofIGA/SCCindicationsatdrilledsupportplatesusingbobbincoilinspectiontechniqueshasbeenprovidedtotheNRCviatheElectricPowerResearchInstitute(EPRI)aspartofEPRINP-6201,Revision4,PWRSteamGeneratorTubeExaminationGuidelines.ThedatademonstratesthatthebobbincoiltechniqueexceedsthedetectionrequirementsofEPRINP-6201,AppendixHwithaprobabilityofdetection(POD)of80%ata90%confidencelevelforflawspenetrating40%throughwall.However,bobbincoiltechniquesfailedtomeetthesizingrequirementssincetheyresultedinarootmeansquareerror(RMSE)of29%(AppendixHrequireslessthanorequalto25%RMSE).FPLhasconsideredtworepairoptionsforeddycurrentindicationsatthe9thand10thdrilledsupportplates.Option1reliesonbobbincoiltechniquesfordetection,andrequiresMRPCexaminationofallflawindicationsreported.Allindicationswhicharecrack-likebyMRPCexaminationwillberemovedfromservice.Non-crackMRPCindicationswillbesizedusingtheEPRIbobbincoiltechnique(RMSE=29%).Indications40%orgreaterthroughwall,orindicationswith>10%growth,sincethepriorinspectionwillberemovedfromservice.Option2alsoreliesonbobbincoiltechniquesfordetection,andrequiresMRPCexaminationofallflawindicationsreported.However,thisoptionrequiresthatallindicationswhichareconfirmedbyMRPCexaminationberemovedfromservice.FPLconsidersoption2excessivelyconservative.Therefore,ourcurrentplanistouseOption1aboveandtoin-situpressuretestthemostsignificantdrilledsupportplateindicationstodemonstratethatadequatestructuralmarginsexistforflawswhichwillremaininserviceintheseregions.TheStaffalsorequestedthatFPLdiscussourplansforsizingIGA/SCCindicationswhicharelocatedinfreespanregions.OurcurrentplanistoapplyOption1,asdiscussedabovefor y~e~~~~St.LucieUnit1DocketNo.50-335L-96-129AttachmentPage7drilledsupportplateindications,forindicationslocatedinthefreespanregions.Tubesremovedin1985provideafullrangeofintergranularmodesofattackfrompatchesoflGAtodiscretecracks.Depthsizingusingpostmortemeddycurrentcalibrationcurveshaveresultedin10yearsofoperationwithoutsignificantinserviceleakage.Basedonextensivepriorinspections,FPLhasathroughunderstandingoftheextentofdegradationintheSt.Luciesteamgenerators.FPLexpectsthatchangesincorrosionmorphologyorincreasesingrowthratewouldhaveresultedinsubstantialinserviceleakageifeddycurrentsizingcriteriawerenonconservative.Generaleddycurrentresponsehasremainedconstantsince1984,withtheonlychangesbeinganincreaseinthenumberofaffectedlocations.Consistencyineddycurrentresponseandlackofsignificantoperationalleakageprovideassurancethatcorrosionmorphologyisbeingadequatelymonitored.NRCREQUESTb.Addressthecomments/questionslistedaboveforeggcratesupportandsludgepileindications(items1through6),asappropriate.FPLRESPONSETheresponsetoquestions1-6for'ggcrateandsludgepileindicationsincludetheresponsesfordrilledsupportplateindications.}} | | FPLwilldiscussthegeneralstateoftheinspection, thenumberandsizeoftheindications andcandidate indications forin-situpressuretesting.TheNRCprojectmanagerwasupdatedbyphoneon5/13/96atapproximately 25%completion. |
| | Resultsfromthein-situpressuretestswillbeprovided, viatelephone, within24hoursofcompletion ofthein-situtestprogram.NRCREQUEST6.Discussyourplanswithrespecttosubmitting asummaryoftheinspection resultsandtheabovementioned heliumandin-situpressuretestresults.FPLRESPONSEResultsfromtheeddycurrentinspections willbesubmitted aspartofthespecialreportrequiredbyTechnical Specification 4.4.5.5.b. |
| | Theresultsfromthein-situpressuretestingwillbesubmitted within10daysofcompletion ofthein-situtestprogram.ZZ.Forindications atthedrilledholetubesupportplateswhichyouplantosizeandleaveinservice:NRCREQUESTa.Discussthequalification datatosupporttheabilitytosizethetypesofindications thatwillremaininservice(e.g.,volumetric indications). |
| | Includethetubepulldataorothertestdatathatconfirmsthatthemorphology ofthequalification dataisconsistent withthemorphology oftheindications inthefield. |
| | )~%'I St.LucieUnit1DocketNo.50-335~,L-96-129Attachment Page6FPLRESPONSEQualification datafordetection andsizingofIGA/SCCindications atdrilledsupportplatesusingbobbincoilinspection techniques hasbeenprovidedtotheNRCviatheElectricPowerResearchInstitute (EPRI)aspartofEPRINP-6201,Revision4,PWRSteamGenerator TubeExaminationGuidelines. |
| | Thedatademonstrates thatthebobbincoiltechnique exceedsthedetection requirements ofEPRINP-6201,AppendixHwithaprobability ofdetection (POD)of80%ata90%confidence levelforflawspenetrating 40%throughwall.However,bobbincoiltechniques failedtomeetthesizingrequirements sincetheyresultedinarootmeansquareerror(RMSE)of29%(Appendix Hrequireslessthanorequalto25%RMSE).FPLhasconsidered tworepairoptionsforeddycurrentindications atthe9thand10thdrilledsupportplates.Option1reliesonbobbincoiltechniques fordetection, andrequiresMRPCexamination ofallflawindications reported. |
| | Allindications whicharecrack-like byMRPCexamination willberemovedfromservice.Non-crack MRPCindications willbesizedusingtheEPRIbobbincoiltechnique (RMSE=29%).Indications 40%orgreaterthroughwall,orindications with>10%growth,sincethepriorinspection willberemovedfromservice.Option2alsoreliesonbobbincoiltechniques fordetection, andrequiresMRPCexamination ofallflawindications reported. |
| | However,thisoptionrequiresthatallindications whichareconfirmed byMRPCexamination beremovedfromservice.FPLconsiders option2excessively conservative. |
| | Therefore, ourcurrentplanistouseOption1aboveandtoin-situpressuretestthemostsignificant drilledsupportplateindications todemonstrate thatadequatestructural marginsexistforflawswhichwillremaininservice intheseregions.TheStaffalsorequested thatFPLdiscussourplansforsizingIGA/SCCindications whicharelocatedinfreespanregions.OurcurrentplanistoapplyOption1,asdiscussed abovefor y~e~~~~St.LucieUnit1DocketNo.50-335L-96-129Attachment Page7drilledsupportplateindications, forindications locatedinthefreespanregions.Tubesremovedin1985provideafullrangeofintergranular modesofattackfrompatchesoflGAtodiscretecracks.Depthsizingusingpostmortemeddycurrentcalibration curveshaveresultedin10yearsofoperation withoutsignificant inservice leakage.Basedonextensive priorinspections, FPLhasathroughunderstanding oftheextentofdegradation intheSt.Luciesteamgenerators. |
| | FPLexpectsthatchangesincorrosion morphology orincreases ingrowthratewouldhaveresultedinsubstantial inservice leakageifeddycurrentsizingcriteriawerenonconservative. |
| | Generaleddycurrentresponsehasremainedconstantsince1984,withtheonlychangesbeinganincreaseinthenumberofaffectedlocations. |
| | Consistency ineddycurrentresponseandlackofsignificant operational leakageprovideassurance thatcorrosion morphology isbeingadequately monitored. |
| | NRCREQUESTb.Addressthecomments/questions listedaboveforeggcratesupportandsludgepileindications (items1through6),asappropriate. |
| | FPLRESPONSETheresponsetoquestions 1-6for'ggcrate andsludgepileindications includetheresponses fordrilledsupportplateindications.}} |
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Category:CORRESPONDENCE-LETTERS
MONTHYEARML17241A5001999-10-21021 October 1999
Forwards Rev 3 to Emergency Response Data Sys (ERDS) Data Point Library for St Lucie Unit 1.Rev Provides Replacement Pages & Follows Format Recommended by NUREG 1394, ERDS Implementation, Rev 1,App C
ML17309A9981999-10-19019 October 1999
Forwards Revised Epips,Including Rev 3 to EPIP-10 & Rev 25 to HP-202.EPIP-10 Added Onsite Monitoring Points,Made Administrative Changes & Incorporated New Attachments & HP-202 Added Red Team Survey Points
ML20217F6171999-10-0808 October 1999
Forwards Insp Repts 50-335/99-11 & 50-389/99-11 on 990827 & 990907-09.No Violations Identified.Matl Encl Contained Safeguards Info as Defined by 10CFR73.21 & Disclosed to Unauthorized Individuals Prohibited by Section 147 of AEA
ML17241A4811999-10-0101 October 1999
Reports Number of Tubes Plugged During Unit 1 Refueling Outage SL1-16,per TS 4.4.5.5.a
ML20212M1601999-09-28028 September 1999
Refers to 990908 Engineering Meeting Conducted at NRC Region II to Discuss Engineering Issues at Lucie & Turkey Point Facilities.List of Attendees & Copy of Presentation Handout Encl
ML17241A4701999-09-25025 September 1999
Forwards Info Requested by NRC Staff During 990916 Telcon to Complete Staff Review of Request for risk-informed Extension of Action Completion/Aot Specified for Inoperable Train of LPSI Sys at Plant
ML17241A4721999-09-24024 September 1999
Forwards Rev 1 to Plant Change/Mod (PCM) 99016 to St Lucie Unit 1,Cycle 16 COLR, IAW TS 6.9.1.11.d.Refueling Overhaul Activities Are Currently in Progress & Reactor Operations for Cycle 16 Are Scheduled to Commence in Oct 1999
ML17241A4681999-09-22022 September 1999
Requests Restriction Be Added to Senior Operator License SOP-21093 for TE Bolander.Nrc Forms 369,encl.Encl Withheld Per 10CFR2.790(a)(6)
ML17241A4671999-09-20020 September 1999
Forwards Completed NRC Form 536, Operator Licensing Exam Data, for St Lucie Units 1 & 2,as Requested in Administrative Ltr 99-03, Preparation & Scheduling of Operator Licensing Exams.
ML17241A4581999-09-13013 September 1999
Forwards Info Requested by NRC Staff During 990630 & 0816 Telcons,To Complete Review of Proposed License Amend for Fuel Reload Process Improvement Program
ML17241A4531999-08-31031 August 1999
Informs That No Candidates from St Lucie Plant Will Be Participating in PWR Gfes Being Administered on 991006
ML17241A4521999-08-31031 August 1999
Withdraws Relief Request 16 & Suppl Relief Request 15 with Info Requested During 990526 Telephone Conference Re ISI Insp Plan,Third 10-yr Interval
ML17241A4501999-08-26026 August 1999
Informs That FPL Has Reviewed Reactor Vessel Integrity Database,Called RVID2,re Closure of GL 92-01,rev 1,suppl 1. Requested Corrections & Marked Up Pages from Rvid 2 Database Summary Repts That Correspond to Comments,Attached
ML17241A4371999-08-13013 August 1999
Forwards fitness-for-duty Program Performance Data for six- Month Period Ending 990630,per 10CFR26.71(d)
ML17241A4461999-08-11011 August 1999
Requests That W Rept Entitled, Evaluation of Turbine Missile Ejection Probability Resulting from Extending Test Interval of Interceptor & Reheat Stop Valves at St Lucie Units 1 & 2, Be Withheld from Public Disclosure
L-99-171, Forwards Rev 56 to Physical Security Plan.Summary of Changes & Marked Up Copy of Revised Pages Also Encl.Encls Withheld from Public Disclosure Per 10CFR2.790(a)(3)1999-07-29029 July 1999
Forwards Rev 56 to Physical Security Plan.Summary of Changes & Marked Up Copy of Revised Pages Also Encl.Encls Withheld from Public Disclosure Per 10CFR2.790(a)(3)
ML17309A9911999-07-26026 July 1999
Forwards Revised EPIPs & Revised Procedures That Implement Emergency Plan as Listed.Procedures Provides Instruction for Operational Support Ctr (OSC) Chemistry Supervisor to Establish Remote Labs at Locations Specified
ML17241A4471999-07-22022 July 1999
Requests That Rev 1 to WCAP-14732 & Rev 1,Add 1 to WCAP-14732 Be Withheld from Public Disclosure
ML17241A4221999-07-22022 July 1999
Forwards List of Proposed Licensing Actions for St Lucie Units 1 & 2,planned During Fys 2000 & 2001,in Response to Administrative Ltr 99-02, Operating Reactor Licensing Action Estimates.
ML17241A4151999-07-22022 July 1999
Forwards Revised Relief Request 25 for Second 10-yr ISI Interval for Unit 2
ML17241A4101999-07-16016 July 1999
Forwards FP&L Supplemental Response to NRC Request for Info Re Y2K Readiness at Nuclear Power Plants
ML17309A9881999-07-0707 July 1999
Forwards Rev 5 to EPIP-03, Emergency Response Organization Notification/Staff Augmentation. Rev 5 to EPIP-03 Was Revised to Transfer EP Responsibilities from Training Manager to Protection Svcs Manager
ML20209F1541999-07-0606 July 1999
Informs That NRC in Process of Conducting Operational Safeguards Response Evaluations at Nuclear Power Reactors. Plant Chosen for Such Review Scheduled for Wk of 990823-26
ML17241A4011999-06-30030 June 1999
Forwards Info Copy of Florida Wastewater Permit (FL0002208) (Formerly NPDES Permit) Mod,Which Was Issued by Florida Dept of Environ Protection on 990604
ML17241A3971999-06-30030 June 1999
Forwards Suppl Response to GL 96-05, Periodic Verification of Design-Basis Capability of Safety-Related Movs, as Requested in 990317 Ltr
ML17355A3661999-06-30030 June 1999
Forwards Florida Power & Light Topical QA Rept, Dtd June 1999.Encl I Includes Summary of Changes Made to Topical QA Rept Since 1998
ML17241A3951999-06-29029 June 1999
Provides Response to NRC Request for Info Re Y2K Readiness at Nuclear Power Plants.Gl 98-01, Y2K Readiness of Computer Sys at Nuclear Power Plants, Requested Response on Status of Facility Y2K Readiness by 990701.Disclosure Encl
ML17241A3731999-06-17017 June 1999
Supplements Relief Requests 4,11 & 13 for Third ten-year ISI Interval with Info Requested During 990526 Telcon.Expedited Review Is Requested by 990730 to Avoid Negatively Impacting Upcoming St Lucie Unit 1 Refueling Outage (SL1-16)
ML17241A3641999-06-14014 June 1999
Submits Supplement to Relief Request 24 with Info Requested by Nrc.In Addition Relief Request 24 Is Identical to St Lucie Unit 1 Relief Request 4 for Third ISI Interval Being Supplemented by FPL Ltr L-99-139
ML20195F3871999-06-11011 June 1999
Final Response to FOIA Request for Documents.App a Records Being Withheld in Entirety (Ref FOIA Exemption 5)
IA-99-247, Final Response to FOIA Request for Documents.App a Records Being Withheld in Entirety (Ref FOIA Exemption 5)1999-06-11011 June 1999
Final Response to FOIA Request for Documents.App a Records Being Withheld in Entirety (Ref FOIA Exemption 5)
L-99-129, Forwards Rev 55 to Physical Security Plan,Summary of Changes & Marked Up Copy of Revised Pages.With Directions for Incorporating Rev Into Plan & Copies of Replacement Pages.Rev Withheld,Per 10CFR2.790(a)(3)1999-06-0909 June 1999
Forwards Rev 55 to Physical Security Plan,Summary of Changes & Marked Up Copy of Revised Pages.With Directions for Incorporating Rev Into Plan & Copies of Replacement Pages.Rev Withheld,Per 10CFR2.790(a)(3)
ML17241A3561999-06-0707 June 1999
Forwards Rept Containing Brief Description & Summary of SEs for Changes,Tests & Experiments Which Were Approved for Unit 3 During Period of 970526-981209
ML17241A3601999-06-0707 June 1999
Forwards Correction to Annual Radiological Environ Operating Rept for CY98.Util Has Identified Transcription Error on Last Page of Attachment C of Rept,Results from Interlaboratory Comparison Program 1998
ML20195F3941999-05-27027 May 1999
FOIA Request That Memo from J Calvo to Fl Lebdon Re TIA - St Lucie,Unit 1 Environ Qualification of Woodward Governor Controls Be Placed in PDR
ML17241A3461999-05-24024 May 1999
Forwards Revised Relief Request 22 to Clarify Several Areas of Relief.Nrc Action Is Requested to Be Complete by Aug 1999 to Support Planning for Spring 2000 Unit 2 Refueling Outage
ML17241A3391999-05-20020 May 1999
Forwards Notification of Change to Small Break LOCA ECCS Evaluation Model Used for St Lucie Unit 1.Anomaly Was Discovered & Corrected That Resulted in Reducing Calculated PCT for Limiting SBLOCA by More than 50 F
ML17241A3371999-05-20020 May 1999
Forwards Util Suppl to GL 95-07 Response Re pressure-locking & Thermal Binding of safety-related power-operated Gate Valves,In Response to NRC Second RAI Dtd 990225
ML20207C7531999-05-17017 May 1999
Discusses Issue Identified by FPL in Feb 1998 Involving Potential for Fire to Cause Breach of Rc Sys High/Low Pressure Interface Boundary & NRC Decision for Exercise of Enforcement Discretion
ML17241A3301999-05-17017 May 1999
Forwards LER 99-004-00 Re as Found Cycle 10 Psv Setpoints Outside TS Limits,Which Occurred on 990415.Root Cause Determination Not Yet Complete.Suppl to Include Root Cause & Corrective Actions Will Be Submitted
ML17309A9821999-05-10010 May 1999
Forwards Rev 36 to St Lucie Emergency Plan, Per 10CFR50.54(q).Executive Summary & Summary of Changes Incorporated by Rev,Encl
IR 05000335/19980141999-04-29029 April 1999
Provides Confirmation of NRC Staff Conclusions Re Cited & non-cited Violations in Insp Rept 50-335/98-14 & 50-389/98-14.Utils Position Re Consideration of Multiple Spurious Actuations in Event of Fire,Reiterated
ML17241A3221999-04-29029 April 1999
Provides Confirmation of NRC Staff Conclusions Re Cited & non-cited Violations in Insp Rept 50-335/98-14 & 50-389/98-14.Utils Position Re Consideration of Multiple Spurious Actuations in Event of Fire,Reiterated
ML17229B1071999-04-28028 April 1999
Forwards 1998 Annual Environ Operating Rept for St Lucie Unit 2. Rept Includes Discussions of 5-inch Barrier Net Maint & Taprogge Condenser Tube Cleaning Sys Ball Loss,As Agreed at First Biennial Sea Turtle Meeting Held on 980120
ML17229B1051999-04-22022 April 1999
Requests That Listed Individuals Be Placed on Official Serve List for Nuclear Matl Safety & Safeguards Info Notices
ML17229B1061999-04-21021 April 1999
Notifies NRC of Change in Medical Status of Licensed Operator Pf Farnsworth (Docket 55-21285,license SOP-21094). NRC Form 3996, Medical Exam Certification, Encl.Encl Withheld Per 10CFR2.790(a)(6)
ML17309A9851999-04-15015 April 1999
Requests That NRC Review Denial of Appeal from Assessment of Fees Assessed in 981101 Invoice RS0062-99 & Assessment of Fees in Invoice RS0182-99 Which Was Also Denied in 990305 Ltr.Both Invoices Are for Fees Re Inspector GG Warnick
ML20205M0431999-04-13013 April 1999
Eighth Partial Response to FOIA Request for Records.App Q & R Records Encl & Being Made Available in PDR
ML17229B0951999-04-0808 April 1999
Requests Approval of Encl Revised Relief Request 6,in Response to 990322 Telcon with NRC & 10CFR55.55a(a)(3). Request States That Visual VT-3 Exams Will Be Conducted IAW IWA-2213 & Repairs Will Be IAW Util ASME Section IX Program
ML17229B0821999-04-0707 April 1999
Requests Approval of Interim Relief Request 26 Re Repair Requirements for Class 2 ECCS Piping,Per 10CFR50.55a(a)(3) & 50.55a(g)(iii).Alternative Actions Apply Guidance of GLs 91-18 & 90-05 & ASME Code Case N-513.Evaluation,encl
1999-09-28
[Table view]
Category:INCOMING CORRESPONDENCE
MONTHYEARML17241A5001999-10-21021 October 1999
Forwards Rev 3 to Emergency Response Data Sys (ERDS) Data Point Library for St Lucie Unit 1.Rev Provides Replacement Pages & Follows Format Recommended by NUREG 1394, ERDS Implementation, Rev 1,App C
ML17309A9981999-10-19019 October 1999
Forwards Revised Epips,Including Rev 3 to EPIP-10 & Rev 25 to HP-202.EPIP-10 Added Onsite Monitoring Points,Made Administrative Changes & Incorporated New Attachments & HP-202 Added Red Team Survey Points
ML17241A4811999-10-0101 October 1999
Reports Number of Tubes Plugged During Unit 1 Refueling Outage SL1-16,per TS 4.4.5.5.a
ML17241A4701999-09-25025 September 1999
Forwards Info Requested by NRC Staff During 990916 Telcon to Complete Staff Review of Request for risk-informed Extension of Action Completion/Aot Specified for Inoperable Train of LPSI Sys at Plant
ML17241A4721999-09-24024 September 1999
Forwards Rev 1 to Plant Change/Mod (PCM) 99016 to St Lucie Unit 1,Cycle 16 COLR, IAW TS 6.9.1.11.d.Refueling Overhaul Activities Are Currently in Progress & Reactor Operations for Cycle 16 Are Scheduled to Commence in Oct 1999
ML17241A4681999-09-22022 September 1999
Requests Restriction Be Added to Senior Operator License SOP-21093 for TE Bolander.Nrc Forms 369,encl.Encl Withheld Per 10CFR2.790(a)(6)
ML17241A4671999-09-20020 September 1999
Forwards Completed NRC Form 536, Operator Licensing Exam Data, for St Lucie Units 1 & 2,as Requested in Administrative Ltr 99-03, Preparation & Scheduling of Operator Licensing Exams.
ML17241A4581999-09-13013 September 1999
Forwards Info Requested by NRC Staff During 990630 & 0816 Telcons,To Complete Review of Proposed License Amend for Fuel Reload Process Improvement Program
ML17241A4531999-08-31031 August 1999
Informs That No Candidates from St Lucie Plant Will Be Participating in PWR Gfes Being Administered on 991006
ML17241A4521999-08-31031 August 1999
Withdraws Relief Request 16 & Suppl Relief Request 15 with Info Requested During 990526 Telephone Conference Re ISI Insp Plan,Third 10-yr Interval
ML17241A4501999-08-26026 August 1999
Informs That FPL Has Reviewed Reactor Vessel Integrity Database,Called RVID2,re Closure of GL 92-01,rev 1,suppl 1. Requested Corrections & Marked Up Pages from Rvid 2 Database Summary Repts That Correspond to Comments,Attached
ML17241A4371999-08-13013 August 1999
Forwards fitness-for-duty Program Performance Data for six- Month Period Ending 990630,per 10CFR26.71(d)
ML17241A4461999-08-11011 August 1999
Requests That W Rept Entitled, Evaluation of Turbine Missile Ejection Probability Resulting from Extending Test Interval of Interceptor & Reheat Stop Valves at St Lucie Units 1 & 2, Be Withheld from Public Disclosure
L-99-171, Forwards Rev 56 to Physical Security Plan.Summary of Changes & Marked Up Copy of Revised Pages Also Encl.Encls Withheld from Public Disclosure Per 10CFR2.790(a)(3)1999-07-29029 July 1999
Forwards Rev 56 to Physical Security Plan.Summary of Changes & Marked Up Copy of Revised Pages Also Encl.Encls Withheld from Public Disclosure Per 10CFR2.790(a)(3)
ML17309A9911999-07-26026 July 1999
Forwards Revised EPIPs & Revised Procedures That Implement Emergency Plan as Listed.Procedures Provides Instruction for Operational Support Ctr (OSC) Chemistry Supervisor to Establish Remote Labs at Locations Specified
ML17241A4221999-07-22022 July 1999
Forwards List of Proposed Licensing Actions for St Lucie Units 1 & 2,planned During Fys 2000 & 2001,in Response to Administrative Ltr 99-02, Operating Reactor Licensing Action Estimates.
ML17241A4471999-07-22022 July 1999
Requests That Rev 1 to WCAP-14732 & Rev 1,Add 1 to WCAP-14732 Be Withheld from Public Disclosure
ML17241A4151999-07-22022 July 1999
Forwards Revised Relief Request 25 for Second 10-yr ISI Interval for Unit 2
ML17241A4101999-07-16016 July 1999
Forwards FP&L Supplemental Response to NRC Request for Info Re Y2K Readiness at Nuclear Power Plants
ML17309A9881999-07-0707 July 1999
Forwards Rev 5 to EPIP-03, Emergency Response Organization Notification/Staff Augmentation. Rev 5 to EPIP-03 Was Revised to Transfer EP Responsibilities from Training Manager to Protection Svcs Manager
ML17241A4011999-06-30030 June 1999
Forwards Info Copy of Florida Wastewater Permit (FL0002208) (Formerly NPDES Permit) Mod,Which Was Issued by Florida Dept of Environ Protection on 990604
ML17241A3971999-06-30030 June 1999
Forwards Suppl Response to GL 96-05, Periodic Verification of Design-Basis Capability of Safety-Related Movs, as Requested in 990317 Ltr
ML17355A3661999-06-30030 June 1999
Forwards Florida Power & Light Topical QA Rept, Dtd June 1999.Encl I Includes Summary of Changes Made to Topical QA Rept Since 1998
ML17241A3951999-06-29029 June 1999
Provides Response to NRC Request for Info Re Y2K Readiness at Nuclear Power Plants.Gl 98-01, Y2K Readiness of Computer Sys at Nuclear Power Plants, Requested Response on Status of Facility Y2K Readiness by 990701.Disclosure Encl
ML17241A3731999-06-17017 June 1999
Supplements Relief Requests 4,11 & 13 for Third ten-year ISI Interval with Info Requested During 990526 Telcon.Expedited Review Is Requested by 990730 to Avoid Negatively Impacting Upcoming St Lucie Unit 1 Refueling Outage (SL1-16)
ML17241A3641999-06-14014 June 1999
Submits Supplement to Relief Request 24 with Info Requested by Nrc.In Addition Relief Request 24 Is Identical to St Lucie Unit 1 Relief Request 4 for Third ISI Interval Being Supplemented by FPL Ltr L-99-139
L-99-129, Forwards Rev 55 to Physical Security Plan,Summary of Changes & Marked Up Copy of Revised Pages.With Directions for Incorporating Rev Into Plan & Copies of Replacement Pages.Rev Withheld,Per 10CFR2.790(a)(3)1999-06-0909 June 1999
Forwards Rev 55 to Physical Security Plan,Summary of Changes & Marked Up Copy of Revised Pages.With Directions for Incorporating Rev Into Plan & Copies of Replacement Pages.Rev Withheld,Per 10CFR2.790(a)(3)
ML17241A3601999-06-0707 June 1999
Forwards Correction to Annual Radiological Environ Operating Rept for CY98.Util Has Identified Transcription Error on Last Page of Attachment C of Rept,Results from Interlaboratory Comparison Program 1998
ML17241A3561999-06-0707 June 1999
Forwards Rept Containing Brief Description & Summary of SEs for Changes,Tests & Experiments Which Were Approved for Unit 3 During Period of 970526-981209
ML20195F3941999-05-27027 May 1999
FOIA Request That Memo from J Calvo to Fl Lebdon Re TIA - St Lucie,Unit 1 Environ Qualification of Woodward Governor Controls Be Placed in PDR
ML17241A3461999-05-24024 May 1999
Forwards Revised Relief Request 22 to Clarify Several Areas of Relief.Nrc Action Is Requested to Be Complete by Aug 1999 to Support Planning for Spring 2000 Unit 2 Refueling Outage
ML17241A3371999-05-20020 May 1999
Forwards Util Suppl to GL 95-07 Response Re pressure-locking & Thermal Binding of safety-related power-operated Gate Valves,In Response to NRC Second RAI Dtd 990225
ML17241A3391999-05-20020 May 1999
Forwards Notification of Change to Small Break LOCA ECCS Evaluation Model Used for St Lucie Unit 1.Anomaly Was Discovered & Corrected That Resulted in Reducing Calculated PCT for Limiting SBLOCA by More than 50 F
ML17241A3301999-05-17017 May 1999
Forwards LER 99-004-00 Re as Found Cycle 10 Psv Setpoints Outside TS Limits,Which Occurred on 990415.Root Cause Determination Not Yet Complete.Suppl to Include Root Cause & Corrective Actions Will Be Submitted
ML17309A9821999-05-10010 May 1999
Forwards Rev 36 to St Lucie Emergency Plan, Per 10CFR50.54(q).Executive Summary & Summary of Changes Incorporated by Rev,Encl
ML17241A3221999-04-29029 April 1999
Provides Confirmation of NRC Staff Conclusions Re Cited & non-cited Violations in Insp Rept 50-335/98-14 & 50-389/98-14.Utils Position Re Consideration of Multiple Spurious Actuations in Event of Fire,Reiterated
IR 05000335/19980141999-04-29029 April 1999
Provides Confirmation of NRC Staff Conclusions Re Cited & non-cited Violations in Insp Rept 50-335/98-14 & 50-389/98-14.Utils Position Re Consideration of Multiple Spurious Actuations in Event of Fire,Reiterated
ML17229B1071999-04-28028 April 1999
Forwards 1998 Annual Environ Operating Rept for St Lucie Unit 2. Rept Includes Discussions of 5-inch Barrier Net Maint & Taprogge Condenser Tube Cleaning Sys Ball Loss,As Agreed at First Biennial Sea Turtle Meeting Held on 980120
ML17229B1051999-04-22022 April 1999
Requests That Listed Individuals Be Placed on Official Serve List for Nuclear Matl Safety & Safeguards Info Notices
ML17229B1061999-04-21021 April 1999
Notifies NRC of Change in Medical Status of Licensed Operator Pf Farnsworth (Docket 55-21285,license SOP-21094). NRC Form 3996, Medical Exam Certification, Encl.Encl Withheld Per 10CFR2.790(a)(6)
ML17309A9851999-04-15015 April 1999
Requests That NRC Review Denial of Appeal from Assessment of Fees Assessed in 981101 Invoice RS0062-99 & Assessment of Fees in Invoice RS0182-99 Which Was Also Denied in 990305 Ltr.Both Invoices Are for Fees Re Inspector GG Warnick
ML17229B0951999-04-0808 April 1999
Requests Approval of Encl Revised Relief Request 6,in Response to 990322 Telcon with NRC & 10CFR55.55a(a)(3). Request States That Visual VT-3 Exams Will Be Conducted IAW IWA-2213 & Repairs Will Be IAW Util ASME Section IX Program
ML17229B0821999-04-0707 April 1999
Requests Approval of Interim Relief Request 26 Re Repair Requirements for Class 2 ECCS Piping,Per 10CFR50.55a(a)(3) & 50.55a(g)(iii).Alternative Actions Apply Guidance of GLs 91-18 & 90-05 & ASME Code Case N-513.Evaluation,encl
ML17229B0851999-04-0505 April 1999
Requests Approval of Encl Relief Request 25 Which Proposes to Use Alternative Requirements of ASME Code Case N-613 in Lieu of Requirements of ASME Section XI Figures IWB-2500-7(a) & IWB-2500-7(b).Action Requested by Aug 1999
ML17309A9791999-03-31031 March 1999
Forwards Revised EPIPs Including Rev 2 to EPIP-00,rev 2 to EPIP-09,rev 2 to EPIP-10 & Rev 10 to HP-207.Summary of Revs Listed
ML17309A9761999-03-23023 March 1999
Forwards Revised Epips,Including Rev 4 to EPIP-03, Er Organization Notification/Staff Augmentation, Rev 3 to EPIP-05, Activation & Operation of OSC & Rev 14 to HP-200, HP Emergency Organization. Changes to Epips,Discussed
ML17229B0691999-03-19019 March 1999
Transmits TS Pages Requested by NRC for Use in Issuance of Proposed License Amend Re SFP Storage Capacity,Per Soluble Boron Credit
ML17229B0721999-03-16016 March 1999
Requests Approval of Enclosed Relief Requests 23 & 24 Re ISI Plan for Second ten-year Interval.Nrc Action Is Requested to Be Complete by Aug 1999 to Support Planning for Spring 2000 Unit 2 Refueling Outage
ML17355A2631999-03-12012 March 1999
Forwards FPL Decommissioning Fund Status Repts for St Lucie, Units 1 & 2 & Turkey Point,Units 3 & 4.Rept for St Lucie, Unit 2 Provides Status of Decommissioning Funds for All Three Owners of That Unit
ML17229B0481999-03-10010 March 1999
Informs That Util Delivered Matls Requested in Encl 1 of NRC Ltr by Hand on 990308,as Requested by NRC Ltr Dtd 990218
1999-09-25
[Table view] |
Text
CATEGORY1REGULATOR INFORMATION DISTRIBUTION
.STEM(RIDS)ACCESSION NBR:9605150395 DOC.DATE:
96/05/14NOTARIZED:
NOFACIL:50-335 St.LuciePlant,Unit1,FloridaPower6Light,Co.AUTH.NAMEAUTHORAFFILIATION BOHLKE,W.H.
FloridaPoweraLightCo.RECIP.NAME RECIPIENT AFFILIATION DocumentControlBranch(Document ControlDesk)
SUBJECT:
Forwardssupplemental inforeSGtubeinspforUnitl.DISTRIBUTION CODE:A001DCOPIESRECEIVED:LTR ENCLSIZE:TITLE:ORSubmittal:
GeneralDistribution DOCKETI05000335NOTESRECIPIENT IDCODE/NAME PD2-3LAWIENSiL.,
COPIESRECIPIENT LTTRENCLIDCODE/NAME 11PD2-3PD11COPIESLTTRENCL11INTERNAL:
ACRSNRR/DE/EMCB NRR/DSSA/SPLB NUDOCS-ABSTRACT EXTERNAL:
NOAC6611111111F&CENTER1RCBNRR/DSSA/SRXB OGC/HDS3NRCPDRDCUMNNOTETO,ALL"RIDS"RECIPIENTS:
PLEASEHELPUSTOREDUCEWASTE!CONTACTTHEDOCUMENTCONTROLDESK,ROOMOWFNSD-5(EXT.
415-2083)
TOELIMINATE YOURNAMEFROMDISTRIBUTION LISTSFORDOCUMENTS YOUDON'TNEED!TOTALNUMBEROFCOPIESREQUIRED:
LTTR,.18.ENCL:17 Y4Ag~4AJ~~
~~)ll~VIFloridaPower5LightCompany,P.O.Box128,FortPierce,FL34954-0128 May14,1996L-96-12910CFR50.4U.S.NuclearRegulatory Commission Attn:DocumentControlDeskWashington, D.C.20555RE:St.LucieUnit1DocketNo.50-335Supplemental Information SteamGenerator TubeInsectionDuringatelephone conversation onMay7,1996,theNRCstaffidentified severalconcernswithrespecttothestructural andleakintegrity ofsteamgenerator tubeindications identified byFloridaPowerandLightCompany(FPL),inthesludgepile,ateggcratesupports, andatdrilledtubesupportplates.Severaloftheseconcernswereidentified asaresultofameetingwithNRConApril22,1996,whenFPLdiscussed, inpart,thesteamgenerator tubeintegrity programforSt.LucieUnit1.Theinformation requested during,thephonecallisattached.
Pleasecontactusifthereareanyquestions aboutthissubmittal.
Verytrulyyours,W.H.BohlkeVicePresident St.LuciePlantWHB/GRMAttachment cc:StewartD.Ebneter,RegionalAdministrator, RegionII,USNRCSeniorResidentInspector, USNRC,St.LuciePlant9605150395 9605i47PDRADQCK050003356LPDRIIanFPLGroupcompany
~~~hi,p1 St.LucieUnit1DocketNo.50-335L-96-129Attachment Page1Forindications attheeggcratesupportplatesandinthesludgepile:NRCREQUEST1.Fortheplannedin-situpressuretestingofthemostsignificant flaws,provideinformation ontheadjustments tothetestpressuretoaccountfor(1)temperature differences betweenoperating conditions andthetest,(2)materialproperties, and(3)lockedtubesupportplateconditions.
Providethecriteriatobeusedforselecting thetubestobein-situpressuretested,thenumberoftubesthatwillbetested,andtheprocedure forthetest(e.g.,withorwithoutareinforcing bladder).
DuetoNRCstaffconcernsregarding theabilitytodepthsizethesetypesofindications, providethebasisforconcluding.
thatyouwillselectthetubeswiththemostsignificant flaws.FPLRESPONSEFPLwillusein-situpressuretestingtoverifythestructural adequacyofthemostsignificant eddycurrenttest(ECT)indications atdrilledsupportplate,freespan,eggcrates andsludgepilelocations.
FPLwillinitially conductin-situpressuretestingwithoutaburstbladdertoassessleakageintegrity.
Leakage,ifobserved, willbemeasuredatnormaloperating differential pressureandathigherpressures.
Ifleakageexceedsmakeupcapacity, theburstbladderwillthenbeinstalled toachievethedesiredtestpressures.
Tubeselection forin-situpressuretestingwillbeconducted byleadECTdataanalysisandengineering personnel.
Selection criteriawillbebasedonreviewofECTdataforavarietyofflawcharacteristics including length,maximumdepth,averagedepth,voltage(amplitude),
- location, potential fortubesupportlock-up,numberofflawsinatube,andflawgrowthrate.Duetothevarietyofflawcharacteristics
- involved, analytical judgmentandevaluation experience isrequiredforassessing theseverityofflawsindications.
'h,I St.LucieUnit1DocketNo.50-335L-96-129Attachment Page2Selection offlawindications forin-situpressuretestingwillbebasedonbobbincoilinspection techniques thatarequalified fordetection anddepthsizingofintergranular attack/stress corrosion cracking(IGA/SCC) ateggcratesupports, freespanandsludgepilelocations.
Candidate indications willalsobeinspected withMRPCtechniques toassesstheflawcharacteristics discussed above.Candidate indications forin-situpressuretestingatdrilledsupportplatelocations willalsobeinspected bybobbincoilandMRPCtechniques.
Selection ofcandidate indications atdrilledsupportplatelocations willrelyonacombination ofdepthandvoltageinformation aswellastheotherflawcharacteristics discussed above.Adjustments toin-situtestpressurewillincludea13%increasefortemperature basedonbursttestingof3/4inchby0.048inchAlloy600tubesamplesatoperating androomtemperatures.
Testpressureforcircumferential flawsatthetubeexpansion transition willalsobeincreased by8.5%forlockedsupportplateconditions basedona40inchspanbetweenthetubesheet andthefirsteggcratesupport.Theadjustedpressures are:FlawADJUSTEDOrientation NOPD/PAxial1622psiCircumferential 1744psiADJUSTED1.4xSLBD/P3955psi4253psiADJUSTED3xNOPD/P4865psi5231psiNOPD/PTubedifferential pressureatnormaloperating systempressures.
NOPD/P=1435psi.SLBD/P'ubedifferential pressureduringSteamlinebreak.SLBD/P=2500psi.In-situpressuretestingofflawedsteamgenerator tubingisbecomingarelatively commonindustrypractice.
Industryexperience within-situpressuretestinghasbeenpositiveintermsofassuringthatadequatestructural marginsexist.FPLwillusefieldprovenequipment andexperienced personnel forin-situpressuretesting.Between10and20ofthemostsignificant indications fromalllocations (eggcrate, sludgepile,drilledsupportplate,orfreespan)willbein-situ St.LucieUnit1DocketNo.50-335L-96-129Attachment Page3pressuretested.In-situpressuretestresultsareexpectedtodemonstrate thatconservative marginsforstructural integrity areprovidedutilizing theECTdepthsizingtechniques.
REQUEST2.Giventhestaffconcernsregarding thedepthsizingtechnique, provideadiscussion ofthefeasibility of,andanyplansyouhave,forperforming heliumleaktestingtoconfirmthatnothrough-wall cracksarepresent.Thisactionwouldprovidesupporting information thatindications sizedlessthan100%through-wall areinfactlessthan100%through-wall providednoleakagewasdetectedforthesetubes.Thistestalsohasthepotential topermittheidentification ofthesourceofanyprimary-to-secondary leakageobservedduringthelastcycle(e.g.,ifleakageisattributed toaplug,thistestmayprovideadditional confidence thatalltheleakageisfromtheplug).FPLRESPONSEFPLhasreviewedheliumleakdetection effortswithaleakdetection vendorandseveralutilities.
Themajorityofleakdetection effortswithheliumhavebeenforleakageinexcessof50gallonsperday(gpd).LeakageatSt.LucieUnit1isestimated at2-4gpd.Theuseofheliumleaktestingforleakagewhichislessthan5gpdisextremely limitedandisnotexpectedtobeeffective.
Also,heliumtestingisnotexpectedtoidentifyleakagethroughaperforated tubewhichcontainsaleakingtubeplugduetothecolumnofwaterwhichistypically presentabovetheplug.Further,thedifficulty inmaintaining apositivepressurewithheliumonthesecondary systemmakesthistestdifficult toimplement.
TheFPLapproachincludesextensive inspections, in-situpressuretestingandimprovedon-lineleakagemonitoring atSt.LucieUnit1.FPLbelievesthatheliumleaktestingwillprovidelittleornobenefitbeyondtheinformation andinsightprovidedbytheothertechniques beingemployed.
NRCREQUEST3.Provideyourplansandscheduleforperforming anestimateoftheconditional probability ofburstgivenamainsteamline
!)
IIj1(~~St.LucieUnit1DocketNo.50-335L-96-129Attachment Page4breakgiventhenumberofindications, themaximumgrowthrateobserved, andtheeddycurrentuncertainties.
FPLRESPONSEFPLwillperformacalculation fortheprobability oftubeburstbasedontheAPTECHEngineering modelofthePaloVerdeSteamgenerator.
Thiscalculation will'valuate theas-leftcondition oftheSt.LucieUnit1steamgenerators andprojecttheendofthenextcycleconditions basedonthenumberofindications, growthratesandeddycurrentuncertainties foralllocations inthesteamgenerator.
Thecalculation oftubeburstprobability willbesubmitted approximately 6monthsafterstartupfromthecurrentrefueling outage(SL1-14).
NRCREQUEST4.Provideyourcriteriafordetermining whetherornotamid-cycle inspection isnecessary asaresultofeddycurrenttesting,in-situpressuretesting,heliumleaktesting,andconditional probability ofburst(e.g.,1E-2),asappropriate.
FPLRESPONSETheECTinspection dataforalllocations inthesteamgenerator willbethebasisfortheassessment oftheneedforamid-cycle inspection.
Thefactorsconsidered willincludein-situpressuretestresultsandtheprobability ofburstcalculation conservatively estimated basedonECTexamination results.Acalculated probability oftubeburstsubstantially greaterthan1X10willbeconsidered asinputtotheneedforamid-cycle inspection.
NRCREQUEST5.Provideyourplanswithrespecttonotifying thestaffifanyindication wouldnotbeabletowithstand theloadingspecified inDraftRegulatory Guide1.121.Thisshouldaddressreporting indications whoselengthexceedsthecriticallengthassuminga100%through-wall flaw.andindications whosedepthexceedsthecriticaldepthassuminganinfinitely longflaw.
St.LucieUnit1DocketNo.50-335L-96-129Attachment Page5FPLRESPONSEFPLwillinformtheNRCprojectmanagerforSt.LucieUnits1and2,viatelephone, oftheprogressoftheinspections aftertheyareapproximately 50%,75%and100$complete.
FPLwilldiscussthegeneralstateoftheinspection, thenumberandsizeoftheindications andcandidate indications forin-situpressuretesting.TheNRCprojectmanagerwasupdatedbyphoneon5/13/96atapproximately 25%completion.
Resultsfromthein-situpressuretestswillbeprovided, viatelephone, within24hoursofcompletion ofthein-situtestprogram.NRCREQUEST6.Discussyourplanswithrespecttosubmitting asummaryoftheinspection resultsandtheabovementioned heliumandin-situpressuretestresults.FPLRESPONSEResultsfromtheeddycurrentinspections willbesubmitted aspartofthespecialreportrequiredbyTechnical Specification 4.4.5.5.b.
Theresultsfromthein-situpressuretestingwillbesubmitted within10daysofcompletion ofthein-situtestprogram.ZZ.Forindications atthedrilledholetubesupportplateswhichyouplantosizeandleaveinservice:NRCREQUESTa.Discussthequalification datatosupporttheabilitytosizethetypesofindications thatwillremaininservice(e.g.,volumetric indications).
Includethetubepulldataorothertestdatathatconfirmsthatthemorphology ofthequalification dataisconsistent withthemorphology oftheindications inthefield.
)~%'I St.LucieUnit1DocketNo.50-335~,L-96-129Attachment Page6FPLRESPONSEQualification datafordetection andsizingofIGA/SCCindications atdrilledsupportplatesusingbobbincoilinspection techniques hasbeenprovidedtotheNRCviatheElectricPowerResearchInstitute (EPRI)aspartofEPRINP-6201,Revision4,PWRSteamGenerator TubeExaminationGuidelines.
Thedatademonstrates thatthebobbincoiltechnique exceedsthedetection requirements ofEPRINP-6201,AppendixHwithaprobability ofdetection (POD)of80%ata90%confidence levelforflawspenetrating 40%throughwall.However,bobbincoiltechniques failedtomeetthesizingrequirements sincetheyresultedinarootmeansquareerror(RMSE)of29%(Appendix Hrequireslessthanorequalto25%RMSE).FPLhasconsidered tworepairoptionsforeddycurrentindications atthe9thand10thdrilledsupportplates.Option1reliesonbobbincoiltechniques fordetection, andrequiresMRPCexamination ofallflawindications reported.
Allindications whicharecrack-like byMRPCexamination willberemovedfromservice.Non-crack MRPCindications willbesizedusingtheEPRIbobbincoiltechnique (RMSE=29%).Indications 40%orgreaterthroughwall,orindications with>10%growth,sincethepriorinspection willberemovedfromservice.Option2alsoreliesonbobbincoiltechniques fordetection, andrequiresMRPCexamination ofallflawindications reported.
However,thisoptionrequiresthatallindications whichareconfirmed byMRPCexamination beremovedfromservice.FPLconsiders option2excessively conservative.
Therefore, ourcurrentplanistouseOption1aboveandtoin-situpressuretestthemostsignificant drilledsupportplateindications todemonstrate thatadequatestructural marginsexistforflawswhichwillremaininservice intheseregions.TheStaffalsorequested thatFPLdiscussourplansforsizingIGA/SCCindications whicharelocatedinfreespanregions.OurcurrentplanistoapplyOption1,asdiscussed abovefor y~e~~~~St.LucieUnit1DocketNo.50-335L-96-129Attachment Page7drilledsupportplateindications, forindications locatedinthefreespanregions.Tubesremovedin1985provideafullrangeofintergranular modesofattackfrompatchesoflGAtodiscretecracks.Depthsizingusingpostmortemeddycurrentcalibration curveshaveresultedin10yearsofoperation withoutsignificant inservice leakage.Basedonextensive priorinspections, FPLhasathroughunderstanding oftheextentofdegradation intheSt.Luciesteamgenerators.
FPLexpectsthatchangesincorrosion morphology orincreases ingrowthratewouldhaveresultedinsubstantial inservice leakageifeddycurrentsizingcriteriawerenonconservative.
Generaleddycurrentresponsehasremainedconstantsince1984,withtheonlychangesbeinganincreaseinthenumberofaffectedlocations.
Consistency ineddycurrentresponseandlackofsignificant operational leakageprovideassurance thatcorrosion morphology isbeingadequately monitored.
NRCREQUESTb.Addressthecomments/questions listedaboveforeggcratesupportandsludgepileindications (items1through6),asappropriate.
FPLRESPONSETheresponsetoquestions 1-6for'ggcrate andsludgepileindications includetheresponses fordrilledsupportplateindications.
