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
Pages
24
From page
2304
To page
2327
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
Serial Year
2006
Journal title
Nuclear Engineering and Design Eslah
Record number
941341
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