Discharge Simulation For CFETR And Electromagnetic Analysis Of Reactor Components

The China Fusion Engineering Experimental Reactor（CFETR）is a G-watt nuclear fusion device that our country is independently developing and designing.With the increase of fusion power,the thermal load capacity of the divertor will face stringent requirements.The use of advanced divertor configurations such as snowflake divertor is one of the effective methods to solve the problem.For this problem,this paper carried out a study on the simulation discharge and the electromagnetic load of the internal components in the divertor configuration.First,the TSC（tokamak simulation code）was used to simulate the entire discharge process of the CFETR.And the two configurations of the single null divertor（SND）and the snowflake-plus divertor（SF+）were realized.The plasma current waveform of the configuration,the evolution process of plasma density,ion/electron temperature,radius,CS coil and PF coil current were figure out.Analyzed the volt-second consumption of plasma current in CFETR during the current bump phase with or without neutral beam particle-assisted heating（NBI）,and the influence of different neutral beam injection conditions（power,time,profile,etc.）on the consumption of volt-seconds.Analysis indicates that proper control of the injection time and energy deposition profile of the neutral beam particles can save about 10%-25%of the volt-second consumption.Secondly,using the plasma current waveform obtained by TSC simulation,the electromagnetic simulation model of the CFETR tokamak device was established in ANSYS to analyze the electromagnetic load on the key components such as the divertor and the blanket during the operation of the device.Through the electromagnetic load analysis of the two different divertor configurations,it is obtained that the maximum electromagnetic force on the components in the reactor is 2028.7N,which is located near the center in the axial direction,and the maximum deformation is 0.2*10^-3.The calculation results show that the electromagnetic load on the components in the reactor under the two divertor configurations meets the safety limit of CFETR design.The research results and research methods of the thesis provide a useful reference for the simulation of the discharge of CFETR and future fusion reactors,as well as the calculation of the electromagnetic load of the components in the reactor.