反应堆压力容器金属o形密封环的数值模拟与试验分析

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1、万方数据浙江～1．业大学硕士学伉沦文NumericalsimulationandexperimentalstudyofRPVmetal0一ringABSTRACTReactorPressureVessel(RPV)innuclearpowerplantsISnotonlyanimportantequipmentofthecoolantpressureboundaryforprimarycircuit，butalsooneofthemostcriticalcomponentsinnuclearpowerplantsanditisfeaturedbyitshightemperatur

2、e，highpressureandstrongradiation．Comparedwiththefatiguefailure，bucklingfailureandcrackingfailureofRPV_sealingfailureisamoreconTfflOflfailuremode．ThedesignandmanufactureofthesealbetweenRPVheadcoverandvesselflangeisoneofthekeytechnologiestoguaranteethatnoradioactivematerials1eakintherunningandt

3、estingproccssesofRPV；inotherwords，thesealingperformanceofRPVdirectlydecideswhetherthenuclearreactorcanbestartedornot．111t11epresentpaper．metalO-typesealringsusedinCAP1400nuclearreactorpressurevesselweretakenandtestswereconductedtostudythecompressionresiliencecharacteristicsofInconel718alloytu

4、bes，theinfluenceofsilvercoatingonitsdeformationcharacteristicswerealsoanalyzed．Theelastic—plasticnumericalsimulationswereconductedtohelpanalyzethedeformationcharacteristicsofOringusingFEMsoftwareABAQUSandsomekeyfactorsinfluencingthesealingabilityofOringwerestudied；forexample，theinfluenceofcom

5、pressionratio．sizesofthetubefincludingsectiondiameterZwallthicknessfandouterdiameterD】andinstallationgrooveclearanceontheresiliencevalueandlinearpressureofO-typeringwerestudied．FEMresultsshowedthatcornpressionratioaffectedthe1inearpressureofO—typeringsinitsworkingprocessanddecideditSresilienc

6、eability：whencompressionratiowasintherangeof15％～20％，enoughlinearpressureandprettyhighresilienceperformancecouldbegot．ThesizeoftubesaffectedthepressuredistributiononthecontactareaanditnotonlyinfluencedtheresiliencevalueandlinearpressuregreatlybutalsocausedthecollapseofO-typeringinthemiddleofth

7、econtactarea．Forinstallationgroovespossessingacertalnsideclearance，linearDressurecouldbeimprovedby13．1％andresiliencevaluealsobeincreased．Besides，whenO—typeringcontactedwiththesidewall，asecondarysealcouldbeachievedandthecollapseofO．．typeringca