Title of article :
BehaviorofzirconiumfuelcladdingunderfastpressurizationratesOriginalResearchArticle
Author/Authors :
JunHwanKim، نويسنده , , MyoungHoLee، نويسنده , , YongHwanJeong، نويسنده , , JaeGwanLim، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2008
Abstract :
Rapidpressurizationtestwascarriedouttoevaluatethemechanicalbehaviorofthezirconiumcladdingunderafaststrainrateaswellasabiaxialstressstateforsimulatinganout-of-pilereactivityinitiatedaccident(RIA)behavior.Influenceoftemperature,hydrogencontentandalloyingelementshavebeenaddressedintheconductedmechanicaltests.Theresultsshowedthatpressurizationratesof5.4GPa/satroomtemperatureand3.1GPa/sat350°Cwereachieved.ThecorrespondingtimetofailurewassimilartoexpectedpowertransientdurationduringaRIA.MaximumhoopstressofZircaloy-4atroomtemperatureand350°Cincreased,respectivelyby24.3and16.8%whencomparedtotheconventionalbursttestresults.Failuremodeswitchedfromaductileballooningtoabrittlefailurewhichleadstoanaxialsplitofthecladdingwhenthehydrogenwasaddedatanominalvalueof600ppm.Whenthetesttemperatureincreased,itseffectwasdiminished.Additionofanalloyingelementinfluencedthemechanicalpropertydifferently.Niobiumactedbeneficiallyagainsthydrogenembrittlementinthatitincreasedtheductilityofthemetalmatrix.
Journal title :
Nuclear Engineering and Design Eslah
Journal title :
Nuclear Engineering and Design Eslah
