• Title of article

    Corelossduringasevereaccident(COLOSS)OriginalResearchArticle

  • Author/Authors

    Bernard Adroguer، نويسنده , , F.Bertrand، نويسنده , , P.Chatelard، نويسنده , , N.Cocuaud، نويسنده , , J.P.VanDorsselaere، نويسنده , , L.Bellenfant، نويسنده , , D.Knocke، نويسنده , , D.Bottomley، نويسنده , , V.Vrtilkova، نويسنده , , Gary Belovsky، نويسنده , , K.Mueller، نويسنده , , W.Hering، نويسنده , , C.Homann، نويسنده , , W.Krauss، نويسنده , , A.Miassoedov، نويسنده , , G.Schanz، نويسنده , , M.Steinbrück، نويسنده , , Stuckert، J. نويسنده , , Hozer، Zoltan نويسنده , , G.Bandini، نويسنده , , etal.، نويسنده ,

  • Issue Information
    روزنامه با شماره پیاپی سال 2005
  • Pages
    26
  • From page
    173
  • To page
    198
  • Abstract
    TheCOLOSSprojectwasa3-yearshared-costaction,whichstartedinFebruary2000.Thework-programmeperformedby19partnerswasshapedaroundcomplementaryactivitiesaimedatimprovingsevereaccidentcodes.Unresolvedrisk-relevantissuesregardingH2production,meltgenerationandthesourcetermwerestudiedthroughalargenumberofexperimentssuchas(a)dissolutionoffreshandhighburn-upUO2andMOXbymoltenZircaloy,(b)simultaneousdissolutionofUO2andZrO2,(c)oxidationofU–O–Zrmixtures,(d)degradation–oxidationofB4Ccontrolrods. Correspondingmodelsweredevelopedandimplementedinsevereaccidentcomputercodes.UpgradedcodeswerethenusedtoapplyresultsinplantcalculationsandevaluatetheirconsequencesonkeysevereaccidentsequencesindifferentplantsinvolvingB4CcontrolrodsandintheTMI-2accident. Significantresultshavebeenproducedfromseparate-effects,semi-globalandlarge-scaletestsonCOLOSStopicsenablingthedevelopmentandvalidationofmodelsandtheimprovementofsomesevereaccidentcodes.Break-throughswereachievedonsomeissuesforwhichmoredataareneededforconsolidationofthemodellinginparticularonburn-upeffectsonUO2andMOXdissolutionandoxidationofU–O–ZrandB4C–metalmixtures.TherewasexperimentalevidencethattheoxidationofthesemixturescancontributesignificantlytothelargeH2productionobservedduringtherefloodingofdegradedcoresundersevereaccidentconditions. Theplantcalculationactivityenabled(a)theassessmentofcodestocalculatecoredegradationwiththeidentificationofmainuncertaintiesandneedsforshort-termdevelopmentsand(b)theidentificationofsafetyimplicationsofnewresults. MainresultsandrecommendationsforfutureR&Dactivitiesaresummarizedinthispaper.
  • Journal title
    Nuclear Engineering and Design Eslah
  • Serial Year
    2005
  • Journal title
    Nuclear Engineering and Design Eslah
  • Record number

    894848

    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=10&DC=894848