Title of article
StudyonjetbreakupbehavioratcoredisruptiveaccidentforfastbreederreactorOriginalResearchArticle
Author/Authors
EijiMatsuo، نويسنده , , YutakaAbe، نويسنده , , KeikoChitose، نويسنده , , KazuyaKoyama، نويسنده , , KazuhiroItoh، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2008
Pages
9
From page
1996
To page
2004
Abstract
Itisimportanttoestimatethecoolingpossibilityofthemoltenjetincoolantduringacoredisruptiveaccident(CDA)ofafastbreederreactor(FBR).Inthepresentstudy,themoltenjetofU-alloy78simulatingthecorematerialisinjectedintothewatersimulatingthecoolant.Thevisualdataofthemoltenjetbreakupbehaviorisobservedbyusingthehigh-speedvideocamera.Thefrontvelocityofthemoltenjetisestimatedbyusingtheimageprocessingtechniquefromthevisualdata.Itshowsthatthefrontvelocityofthemoltenjetcanbedividedintothreetimeregions.Inthefirstregion,thefrontvelocityofthemoltenjetincreases.Inthesecondregion,thefrontvelocityofthemoltenjetsuddenlydecreases.Inthethirdregion,thefrontvelocityofthemoltenjetkeepsatlowandsteady.Infirstregion,thecolumndiameterofthemoltenjetdecreaseswiththepassageoftime.Atthelocationbetweenfirstregionandsecondregion,thecolumnofthemoltenjetbreaksupanddisappears.Inthepresentstudy,thejetbreakuplengthisdefinedasthedistancefromthewatersurfacetothelocationwherethejetcolumndisappears.Theresultsshowthatthejetbreakuplengthdependsontheinjectionnozzlediameter,butdoesnotdependonthejetpenetrationvelocity.ThistendencyagreeswiththepredictionbyEpsteinʹsequation.Aftertheexperiment,thesolidifiedfragmentsarecollectedandthemassmediandiameterismeasured.Themassmediandiameteriscomparedwiththeexistingtheories.Furthermore,amodeltoestimatethecoolingpossibilityduringaCDAofaFBRisconstructed,reflectingtheabove-mentionedresults.
Journal title
Nuclear Engineering and Design Eslah
Serial Year
2008
Journal title
Nuclear Engineering and Design Eslah
Record number
895154
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