ML17308A239
| ML17308A239 | |
| Person / Time | |
|---|---|
| Site: | Saint Lucie  |
| Issue date: | 06/30/1987 |
| From: | LAKNER A A, WHEATLEY J C VIKING SYSTEMS INTERNATIONAL |
| To: | NRC |
| References | |
| CON-FIN-D-1762, CON-NRC-03-87-028, CON-NRC-3-87-28 NUDOCS 8707140388 | |
| Download: ML17308A239 (17) | |
Text
INTEGRATEDLEAKRATETESTFORST.LUCIENUCLEARPOWERPLANT(UNIT//2)TECHNICALEVALUATIONREPORTApril1987-June1987PreparedbyJ.C.Wheatley,A.A.LaknerVIKINGSYSTEMSINTERNATIONALPreparedforU.S.NuclearRegulatoryCommissionUnder.Contract//NRC-03-87-0288707140388870630389PDRADQCIC050003DR89'P ABSTRACTThisTechnicalEvaluationReportisinsupportoftheFloridaPowerandLightsubmittalofitsIntegratedLeakRateTest(ILRT)-St.LuciePlantNo.2.ThisreportwaspreparedbyVikingSystemsInternational,Pittsburgh,PAunderNRCContractNo.NRC-03-87-028,FINNo.D-1762.Thereviewofthenumbersandcalculationsforairmassandleakagepercentageperdayalla'greewiththenumbersexpressedinthereport.TheILRTresultsaresatisfactoryandwithincriteriaestablishedforthetests.Consideringthatthisreportwaspreparedwithoutthebenefitofasitevisitithasbeenassumedthattheproceduresappliedinthetesttechniquesweresatisfactory.
IlIF TABLEOFCONTENTSSUMMARYBACKGROUNDINTRODUCTIONTESTREVIEW5SUMMARYPAGE
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SUMMARYBasedontherawdata,thereviewofthecalculationsandtheresultingvaluesofairmassandleakagepercentageperdayallagreewiththevaluesinthereportsubmittedbyFloridaPowerandLight.ThereportvaluesforpressuresIand2,ResistanceHumidityDetectors(RHD)Ithru10,andResistanceTemperatureDetectors(RTD)Ithru40allcheckoutsatisfactorilyandaspredictableexceptforRHDI,whichhadasteadyincreaseastheattachedgraphindicates.Theaveragerelativehumidityfora24hourperiod,however,issatisfactory.TheILRTresultsaresatisfactoryandwithincriteriaestablishedforthetests.ConsideringthatnositevisitwasperformedinordertoobtainandreviewtheproceduresusedfortheILRTandthetestequipmentvalidation,ithastobeassumedthattheproceduresweresatisfactory.Additionally,itisassumedthatthepersonnelconductingthetestwerequalified.
BackroundVikingSystemsInternationalunderContractNo.NRC03-87-028wasaskedtoperformareviewoftheFloridaPowerandLightIntegratedLeakRateTest(completedMay17,1986)Reportandevaluatethetestresults.BasedonthiseffortaTechnicalEvaluationReport(TER)wastobeprepareddocumentingthetestresultsandtheadequacyofthetest.Duetotheabsenceofasitevisitthefollowingassumptionshadtobemade:a.Testprocedureswereadequateb.Testequipmentforcheckoutandcertificationwereappropriateforthetest,andc.Personnelconductingthetestwerefullyqualified.Theabovelimitationshavetobeconsideredintheappraisalofthisreport.-2-IntroductionTheILRTreviewwasconductedfromthedatasubmittedinthereport;datawhichwasrecordedatintervalsof15minutes.Thetestwascomprisedofa5.75hourtemperaturestabilizationphase,a24.0hourIntegratedLeakRateTest(ILRT)anda4.0hoursControlledLeakRateTest(CLRT).Thetestingprocedurewasinitiatedat0750houronHay16,1986andcompletedat1650hoursonNay17,1986.Thedataconsistsof40RTD's,temperaturereadings,2pressurereadings,and10RHD,relativehumidityreadings.Thedatawasprintedoutforevery15minutesoflapsetime.TheaveragetemperatureindegreesF,absolutepressureandrelativehumiditywasrecorded.Thevaporpressurewasalsocalculatedandrecorded.Therecordedpointswereutilizedtocompletethecalculationtodeterminetheweightoftheairmassinthecontainment.Theleakagewascalculatedonapercentageperdaybasiseveryquarterhour.-3-
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TestReviewandSummarTheILRTreportwasreviewedforbothtechnicalaccuracyandclarityofpresentation.TheVikingcal'culatedcontainmentvolumeairmassweightleakagesagreedwiththosegivenintheILRTreportvalueswithinsignificantfigureroundout.SmalldifferencesbetweenthevaluesforairmassweightleakagesintheILRTreportandtheVikingcalculationsareattributedtodifferencesbetweentheinitialILRTreportvaluesobtainedbytheircomputerandourpresenthandvalues.Suchroundoffdifferencesareoftheorderofamaximumoffourpoundsintotalpressurevalueswhichwereoftheorderof450,000pounds.Theroundofferrorwasthereforelessthan0.0009%.Therawcomputerdatagiveninthereportwasobtainedin15minuteintervalsviaadataaccessingsystem.SuchinformationwassaidtohavebeenreviewedandverifiedbyFP&L.Assuch,thispreliminaryverification,priortoourownassessment,tendstoincreaseourconfidenceintheFP8Lvalues.Theacceptancecriteriafortheproposedtestwasaleakage-of0.2635perday.Thetotalresultsprovidedanoverallleakrateof0.076%andaleastsquarefittedleakrateof0.078$perday.Thetestleakagevalueswerethuslessthanthecriteriaandarethereforeacceptable.ITheresultsoftheILRTwereverifiedbytheControlledLeakageRate Test(CLRT).Asuperimposedflowof11.47SCFHwasaddedtotheleakagealreadypresentinthecontainment.Thissuperimposedflowwasequivalenttoaleakageof0.264'5perday.TheCLRTwasconductedforafourhourperiod.ThemeasuredCLRTleakagerateforthisperiodwas0.322%perday.Thetargetleakageforthistestwas0.342+0.088$perday.Thetestresultswerewithinthecriteria.ThevaluesforhumidityobtainedfromtherelativehumiditydetectorRHD81indicatedawidevariationduringthecourseoftheILRT.Thevaluesincreasedfrom33.62%RHatILRTtestinitiationto63.9Xne'artheendoftheILRTtest.Therelativehumidity,accordingtothisdetectorwasapparentlystillrising.Suchextremevariationinrelativehumidityisnotinaccordwithrelativehumiditiesobtainedfromtheotherrelativehumiditydetectorsandthereforeappearsanomalous.Thisindiviclualanomalydoesnotappreciablyaffecttheoveralltestresults,asmaybeseeninfigureIwheretheaveragerelativehumidityis54.88%.Sincenositevisitwasmade,testequipmentcertificationandpersonnelqualificationswereassumedtocomplywithtestqualityassurancerequirements.Theconsistencyoftheresultstendtoconfirmthisassumption.TheFPSLreportstatedthattheinspectionofinternalandexternalcontainmentstructureswasperformedpriortocontainmentpressurization1asrequiredbytheproposedleakagetest.Itisassumedthatsuchan 65'igure1:RelativeHumidityinContainmentversustimeelapsed.sincestartofleakratetest6055508woo4540353007Avg.Rel.Humidityforall10detectors:54.88%DetectorNo.10Avg.Rel.Humidity52.82%48.38%50.98%55.33%49.12%55.44%55.83%59.34%61.12%60.34%2025Timeelapsedsincestartoftest,hours inspectionwasperformed.Thereviewoftherawdataandtheresultsofthetypes"B"'nd"C"localleakageratetestwerecompletedbyFP&LpersonnelandappearacceptableasstatedintheFP8LLeakRateTestReport.Thetestproceduresfortestingpiping,electricalpenetrations,airlocksealsanddooroperatingmechanismscanbeassumedtocomplywiththetechnicalspecificationsforthesiteandthatthelatesttestresultsarerecordedintheILRTreport.Theinspectionofthecontainmentstructuresbothinternalandexternalareindicatedasbeingcompletedpriortothepressurizationofthecontainment.Reviewofthedatafortypes"B"and"C"localleakageratetestshavebeencompletedandareacceptableforILRT.Inspectionandreviewofalignmentofvalvesandbreakersfortestconditionarerequiredtocompletethetestingwithoutcausingamishapduringthedurationofthetesting.Theproceduresforcompletingtheaboveoperationwerenotavailableforreview;verificationthatallequipmentwasproperlysetupandcheckedofffor,futurereferencescouldthereforenotbeproperlyperformedbythisreview.TheinspectionofcontainmentmadenomentionofanyrepairsthatwererequiredbeforecontinuingtheILRT.ApreliminaryreviewofFSARsectionsandTechnicalSpecificationfortheLeakRateTesthasbeenperformedtocheckifthemethodologyofthe-testisconsistentwiththatinthereport.TherestillremainsaneedtoperformareviewofcontainmentpenetrationsandopeningleakageresultsleadinguptoactualILRT.Asitevisitwouldhaveprovidedthe-7 opportunitytoobtaintherequiredinformationtocompleteacomprehensivereportontheILRT.TherawdatausedintheFP&Lreportisstatedtohavebeenobtainedat15minuteintervals.Exactlyhowsuchdatawascollectedisnotclear.FromtheFP&Ldescriptionofthe'atacollectionmethodology,itissuggestedthattherawdatawascollectedonadataloggerandtransmittedtothecomputerat15minuteintervals.Thequestionremainsofhow15minutesofaccumulationofdatawashandledbeforetransfertothecomputer,isunanswered.Wasanaverageofthedatatransferredorwasthelastdatapointsimplytransferred?Also,detailsofhowthecomputerperformedthecalculationforvaporpressurechangesandmassleakageratesobtainedfrompressurereadingsarenotgiven.Since-thedatawasreviewedandverifiedbyFP&Lpersonnelasthetestprogressed,therawdatainthetablesprintedinthereportwereusedwithoutmodificationfortheircalculation.Arecalculationofthedataagreeswiththereportandvariesonlyinthelastnumberwhichistheresultofroundingoffthenumbers.AreviewofFSARrequirementscomparedwiththeprocedureforILRTconfirmsthatallrequirementsweremetorexceeded.TheILRTreportcalculationsforairmassandleakagerateperday,aresatisfactoryandmeetallcriteriaforthistest.8-SecificCommentsontheILRTReortCommentI-PageIoftheILRTReport"TheILRTTestwasperformedatapresureinexcessofthedesignatedtestpressurespecifiedintheFinalSafetyAnalysisReport".Thevaluesofthedesignatedtestpressureandtheactualtestpressuresshouldbespecifiedinthenextsentenceof'hereport.ItwouldnotthenbenecessarytolookuptestpressuresindatatablesandFSARsections.Comment2-Page2oftheILRTReport,Line14Change"killed"toannealedorchilled.Whatisintended?lComment3-Page3oftheILRTReportAgeneralformofthegaslawequationisgiven.Providethespecificgasequationandalsoprovideunitsforthevarious3parameters,i.e.pressureinpsia,volumeinfeet,etc.9 Comment4-Page3oftheILRTReportThisisthewrong"discrete".Comment5-Page4oftheILRTReportGeneralequationsaregiven,i.e,"(5RH)SteamTable=PvJTLocalJSpecifythefunctionalitybetweentherelativehumidityandlocalsteamtabletemperaturevalues.Suchspecificationsandamplificationmakethereportmoreeasilyunderstood.Comment6-Page6oftheILRTReport,Line6Correcttypingerror"if"tois.Comment7-Page7oftheILRTReport"ContainmentairmassisdeterminedfrommassweightedsensorreadingsasdescribedinEPRIreportNP-2726".Themethodologyshouldbeprovidedandreferenced.10-Comment8-Page8oftheILRTReport"SamplerejectionbasedontheChauvenetcriteriamaybeusedinanalysis".AmplificationoftheChauvenetcriteria,presumablyastatisticaltechniquewherebycertaindatacanbeexcluded,wouldbehelpful.Ataminimumthe"Chauvenetcriteria"shouldbestatedasastatisticaltechniquefordeterminingdatarejectioncriteria.GeneralCommentsonClaritThroughoutthereportandonthegraphs,adistinctionismadebetweenrawdataand"fitted"data.Anexplanationoftheterm"fitted"datashouldbemade.Presumably,thedatahasbeenfittedviaaleastsquaresstatisticaltechniquetodeterminethebestfitofthedatatoamathematicalrepresentation.11