Title of article :
MELCOR/MACCSsimulationoftheTMI-2severeaccidentandinitialrecoveryphases,off-sitefissionproductreleaseandconsequencesOriginalResearchArticle
Author/Authors :
T.Haste، نويسنده , , J.Birchley، نويسنده , , E.Cazzoli، نويسنده , , Sylvia K. Vitazkova، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2006
Abstract :
MELCORhasbecomethepreferredcodeoftheSwissnuclearindustryandofPSIforsevereaccidentanalysis,onaccountofitsintegratedsystems-levelapproachandvalidationagainstexperimentsandmoredetailedcodes,whileMACCSiscommonlyusedbysafetyauthoritiesforindependentassessmentofoff-siteconsequences,inparticularhealtheffects.ThepresentworkarisesoutofaprogrammetoassessMELCORindependentlyusingempiricaldataconsistentwiththerecommendationsoftheOECD/CSNIvalidationmatrixforcoredegradationcodes.TheMELCOR1.8.5RDcalculationsarebasedonamodelforphases1and2providedbythecodedevelopersbutwithasimplifiedthermalhydraulicnodingincertainregionsandtheinclusionofasimplerepresentationofthefissionproductreleaseandtransportpathways.Themodelhasalsobeenextendedtosimulatephases3,4,andthecontinuinginitialperiodofcorerecoveryandstabilisation.ThesecalculationsareafirstattempttodemonstrateaMELCOR–MACCScapabilitytosimulatethewholeplantaccidentsequencebeyondphase4,includingthecontainmentresponseandoff-siteconsequencesarisingfromfissionproductreleasefromthecontainment.Emphasisisplacedontheoverallaccidentevolutionandwholeplantresponse,ratherthanthedetailedbehaviour.Resultsarecomparedwithobservedanddeduceddataforthemajoraccidentsignaturesandroughestimatesforexposurebasedonoff-sitemonitoring.TheresultsprovideagoodbasisfortheNPPanalysisforeseen.
Journal title :
Nuclear Engineering and Design Eslah
Journal title :
Nuclear Engineering and Design Eslah
