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ID:40081260
大小:883.23 KB
页数:21页
时间:2019-07-20
《IAEA-stress test methodology for NPPs in the wake of the fukushima accident》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、STRESSTESTMETHODOLOGYFORNUCLEARPOWERPLANTSINTHEWAKEOFTHEFUKUSHIMAACCIDENTFrankNuzzoIAEANuclearPowerEngineeringf.nuzzo@iaea.orgENSREGHighLevelRequirementsFollowingtheextremeeventsinFukushima,mostcountriesareconductingasafetyreviewoftherobustnessoftheirNPPsTheUS,Russia,China,Korea,Japanhaveunderta
2、kenrigorousreviewsInternational/Nationalorganizations(IAEA,WANO,INPO)arepreparingorhaveissuedguidelinesandspecificationstodealwithextremeeventsInEuropetheEuropeanNuclearSafetyRegulatorsGroup(ENSREG)haveissuedaspecificationforastresstestoftheirfacilities”TheEuropeanDeclarationonthepost-Fukushimas
3、tresstest”FrankNuzzo-IAEA-NPNE10/20/20112Exampleofan“extremeevent”Initiatingevent:Anunforeseeninitiatingexternaleventsuchasanearthquakeofamagnitudelargerthantheplantdesignandlicensingbasis,inducingthedestructionofallinfrastructurearoundtheplantandthecollapseofadamupstreamoftheNPPwhichfloodsthereg
4、ionanddefactoisolatestheNPP.Consequencesontheplant:TheNPPmayexperiencethisexternaleventasbothabeyonddesignbasisearthquakecombinedwithafloodexceedingthedesignbasisflood,whichtogethermayinducecliff-edgeeffects(sub-events)suchas:ProlongedlossofAC=prolongedStationBlackOut(SBO)orProlongedlossofUHSor
5、ProlongedlossofbothservicesextendingwellbeyondthemissiontimeofthesafetybatteriesandofallFW&reservewaterinventoriesFrankNuzzo-IAEA-NPNE10/20/20113Japan’sstresstest&safetyreviewJapanisconductingimpactanalysesofvariousearthquakes/tsunamicombinationswithprolongedSBO+lossofUHSasaresult.Themethodinvolv
6、es3steps:1.Identificationofcomponentssusceptibletodamageforimpactsexceedingdesignbasis2.Identificationofaccidentsequencesforhazards/magnitudesexceedingdesignbasis,assuminglossofsafetyfunctionsandofcliff-edgeeffectsinducinglossofcomponentsneededtomitigatetheaccident.3.Identificationofmeasurestoprev
7、entfueldamage(hardwareandSevereAccidentManagementGuidelines[SAMG]).FrankNuzzo-IAEA-NPNE10/20/20114ResponsetoFukushimaintheUSTheUSNRCsetupaFukushimaNear-TermTaskForce(NTTF)whichrecommended:ActionsidentifiedinSEC
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