Engineering design of China Fusion Engineering Test Reactor (CFETR) Central Solenoid (CS) coil had been started in Institute of Plasma Physics, Chinese Academy of Sciences. The highest field of CS coil is 17.2T when the running current is 60KA. CS magnet system mainly consists of 8 Nb3Sn coils compressed with 8 sets of preload structure. The functions of the preload structure are to apply an enough axial compression to the CS coils and to have a mechanical rigidity against the repulsive force between 8 Nb3Sn coils. This paper describes structural design of CFETR CS magnet system. A global finite element model was created based on the design geometry data to investigate the mechanical property of CFETR CS preload structure and support structure under the different operating conditions. A local finite element model based on structure design was created to calculate the stress on the conductor jacket and turn insulation.
Key words: CFETR, Central Solenoid, structural design, FEA, Magnet