Title of article :
AnalysisoftheturbinedebladinginanHTGRwiththeCATHAREcodeOriginalResearchArticle
Author/Authors :
M.Saez، نويسنده , , N.Tauveron، نويسنده , , T.Chataing، نويسنده , , G.Geffraye، نويسنده , , L.Briottet، نويسنده , , N.Alborghetti، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2006
Abstract :
ThedirectcouplingofaGasCooledReactor(GCR)withaclosedgas-turbinecycleleadstoaspecificdynamicplantbehaviour.ThisbehaviourisdescribedandillustratedthroughcomputeranalysesperformedatCEAwiththecomputercodeCATHARE.Thisanalysisrequiresa1Dcodeabletosimulatethewholereactor,includingthecore,thevessel,thepipingandthecomponents(turbine,compressors,heatexchangers).
Thispaperisdevotedtodebladingaccidents.Theproblemsandsolutionsencounteredinvarioustypesofgas-turbinesarepresented:aeroengines,steamturbines(EDF-Porchevillesteamturbineaccidentfeedback)andfinallythefeedbackfrompreviousHighTemperatureGasReactorexperiments(EVOheliumloop,HHTprojectandotherHTRprojects)aredisplayed.Fromthisliteraturesurvey,somerecommendationsaredrawnforafutureHighTemperatureReactor.Itisshownthatforsafetyreasonsincaseofdeblading,ahorizontalshaftalignedwiththereactorvesselisrecommendedfortheturbomachinery.
ThispaperpresentssimulationsofdifferentscenariiperformedwithCATHAREcode:
(a)
Turbinedebladingwithandwithoutreactortrip.Inthesecalculations,apessimisticassumptionhasbeenmade:allturbinebladesbreakoff.
(b)
Totalflowblockage.Theflowareaisentirelyblockedbytheturbineblades.
(c)
Partialflowblockage.Previousconclusionsconsidertheworstcasesofdebladingandtotalflowblockage.Anintermediatecasebasedonapartialdebladinghasalsobeenperformed.
CATHAREresultsillustratethatthelossofturbinebladesisaccompaniedbyabruptchangesinthePowerConversionSystemandreactorflowconditions:largeaxialpressuredrop,reverseflowthroughthecoreandhighratede-pressurization.
Journal title :
Nuclear Engineering and Design Eslah
Journal title :
Nuclear Engineering and Design Eslah
