简介:摘 要:根据对ITER项目部已完成的CWP003+008包施工过程的分析,在实际进展与进度计划对比的基础上,寻找进度优化及风险预判的可能性,用于指导后续CWP包的准备以及现场实施,以达到对CWP包计划优化及风险管控。
简介:AnewchallengetotheexistingpelletfuellingtechniquefortheInternationalThermonuclearExperimentalReactor(ITER)hasbeendiscussedbycomputingablationrateusingKuteevlentilmodelwithconsideringthekineticeffects.NumericalintegralresultsshowtheexistingpelletinjectiontechniquewillbedifficulttomeetthedeepfuellingrequirementforthereactorrelevantplasmaofITER.Ashighasapressureof254MPashouldbeappliedtothepelletacceleratorof2-meterslongsinglestagepneumaticgun,
简介:Thermalhydraulicanalysiswasperformedforthe2004ITERblanketdesign,whichwasbasedonthefabricationmethodsofforging,drillingandwelding.Resultsshowthat,intheoriginaldesign,theflowdistributioninradialholeswasfarfromuniformbecausedifferentflowdriverswereusedintheradialholes.Improvementoftheflowdriverisproposedinthisstudy.Withtheoptimizationoftheflowdrivers,itisclearlyshownthatthetotalpressuredropdecreasesandabettervelocitydistributioninradialholesisobtained.Themoreuniformheattransfercoefficientamongtheradialholesisbeneficialforreducingthermalstress.
简介:TheDCreactorisanimportantpieceofequipmentforrestrainingloopandripplecurrentsintheinternationalthermonuclearexperimentalreactor(ITER)converterpowersupplysystem.Asthereactorisoperatedatasteadystateof27.5kAandneedstowithstandapeakcurrentof175kA,sothedesignoftheDCreactorusedintheITERconverterpowersupplysystemisnecessary.Anewwater-coolingdry-typeair-corereactorisdesignedinthiswork.Thedetailedstructuralparametersarecalculatedbytheoreticalformulas,andthenthestructureisoptimizedbyelectromagneticsimulationwithANSYS.Finally,thermalanddynamicstabilityanalysesareperformedtoverifythetemperatureandstressataratedcurrentof27.5kAandpulsedcurrentof175kA.TheanalysisresultsshowthatthetemperatureandstressmeettherequirementsoftheITERconverterpowersupplysystem.
简介:AstructuralanalysisoftheInternationalThermonuclearExperimentalReactor(ITER)vacuumvessel'slowerportregionwaspresentedbymeansofafiniteelementanalysismethod.Thepurposeistoevaluatethestressanddisplacementlevelonthisstructureundervariouscombinationsoffivedesignedloads,includingthegravityofthevacuumvessel,seismicloads,electromagneticloads,andpossiblepressureloadstoensurestructuralsafety.ThecyclicsymmetryfiniteelementmodelofthisstructurewasdevelopedbyusingANSYScode.There-sultsshowedthatthemaximumstressdoesnotexceedtheallowablevalueforanyoftheloadcombinationsaccordingtoASMEcodeandtheninevacuumvessel(VV)supportshavetheabilitytosustaintheentireVVandinvessel-componentsandwithstandloadcombinationsunderbothnormalaswellasoff-normaloperationconditions.StressmainlyconcentratesontheconnectingregionoftheVVsupportandlowerportstubextension.
简介:AdesignofthemainAC/DCconvertersystemforITERisdescribedandthecon-figurationofthemainAC/DCconvertersispresented.Toreducethereactivepowerabsorbedfromtheconverterunits,themainAC/DCconvertersaredesignedtobeseries-connectedandworkinasequentialmode.Thestructureoftheregulatoroftheconvertersystemisdescribed.AsimulationmodelwasbuiltupforthePSCAD/EMTDCcode,andthedesignwasvalidatedaccordingly.Harmonicanalysisandreactivepowercalculationoftheconvertersunitsarepresented.Theresultsrevealtheadvantageofsequentialcontrolinreducingreactivepowerandharmonics.