简介:TheChineseFusionEngineeringTokamakReactor(CFETR)isanimportantintermediatedevicebetweenITERandDEMO.TheWaterCooledCeramicBreeder(WCCB)blanketwhosestructuralmaterialismainlymadeofReducedActivationFerritic/Martensitic(RAFM)steel,isoneofthecandidateconceptualblanketdesign.AnanalysisofrippleanderrorfieldinducedbyRAFMsteelinWCCBisevaluatedwiththemethodofstaticmagneticanalysisintheANSYScode.Significantadditionalmagneticfieldisproducedbyblanketanditleadstoanincreasedripplefield.Maximumripplealongtheseparatrixlinereaches0.53%whichishigherthan0.5%oftheacceptabledesignvalue.Simultaneously,oneblanketmoduleistakenoutforheatingpurposeandtheresultingerrorfieldiscalculatedtobeseriouslyagainsttherequirement.
简介:Inordertoinvestigatethenuclearresponsetothewater-cooledceramicbreederblanketmodelsforCFETR,adetailed3Dneutronicsmodelwith22.5otorussectorwasdevelopedbasedontheintegratedgeometryofCFETR,includingheterogeneousWCCBblanketmodels,shield,divertor,vacuumvessel,toroidalandpoloidalmagnets,andports.UsingtheMonteCarloN-ParticleTransportCodeMCNP5andIAEAFusionEvaluatedNuclearDataLibraryFENDL2.1,theneutronicsanalyseswereperformed.Theneutronwallloading,tritiumbreedingratio,thenuclearheating,neutron-inducedatomicdisplacementdamage,andgasproductionweredetermined.TheresultsindicatethattheglobalTBRofnolessthan1.2willbeabigchallengeforthewatercooledceramicbreederblanketforCFETR.
简介:Thispaperpresentstheresultsofourinvestigationsofbreakdownmechanisms,aswellasadescriptionoftheirinfluenceonthedistributionsoftimedelaydistributions,foragastubefilledwithnitrogenat4mbar.Thevaluesofthetimedelayaremeasuredfordifferentvoltages,andthevaluesoftherelaxationtimesandtheirdistributionsandprobabilityplotsareanalyzed.TheobtaineddensitydistributionshaveGaussiandistributionsandexponentialdistributionsfordifferentvaluesofrelaxationtimes(Gaussianforsmallvaluesandexponentialforlargevaluesofrelaxationtime).ItisshownthatformiddlevaluesofrelaxationtimethedelaydistributionshaveashapebetweenGaussianandexponentialdistributions,whichisaresultofthedifferentinfluencesofelectricalbreakdown.