Title of article :
ExperimentalandtheoreticalinvestigationsontheCOMETconceptforex-vesselcoremeltretentionOriginalResearchArticle
Author/Authors :
WalterWidmann، نويسنده , , ManfredBürger، نويسنده , , GünterLohnert، نويسنده , , HansAlsmeyer، نويسنده , , WalterTromm، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2006
Abstract :
Intheveryunlikelycaseofacoremeltaccidentinanuclearpowerplant,thereactorpressurevesselcouldfailandcoriummeltcouldbereleasedintothereactorcavity.Subsequentprocessescouldresultinathreatofthecontainmentintegrity.Asacounter-measuretheimplementationofacore-catcherdeviceinnuclearpowerplantsisenvisaged.Suchacore-catcherconcepthasbeendevelopedattheForschungszentrumKarlsruhe(FZK,Germany)withintheCOMETproject.Itisbasedonwaterinjectionintothemeltlayerfromthebottom,yieldingrapidfragmentationofthecorium,porosityformationandthuscoolability.DetailedlargescaleexperimentswithsustainedheatingofmeltshavehighlightedthesequencesoffloodingandcoolingandhavebeenusedtooptimisetheCOMETconcept.Theopenporositiesandlargesurfacesthataregeneratedduringmeltsolidificationformaporouspermeablestructurethatispermanentlyfilledwiththeevaporatingcoolantwaterandthusallowsefficientshort-termandlong-termremovalofthedecayheat.Twovariantsofthebottomfloodingconcepthavebeendevelopedandseemtechnicallymatureforreactorapplication.Coriumlayersupto0.5mhigharesafelyarrestedandcooledbywatersupplywith0.2baroverpressure.
Journal title :
Nuclear Engineering and Design Eslah
Journal title :
Nuclear Engineering and Design Eslah
