Evaluation of CFETR key parameters with different scenarios using system analysis code

This paper presents a system analysis on both phases of China Fusion Engineering Test Reactor (CFETR) under the same structure of toroidal field coil with a magnetic field on axis of 6–7 T and device size of major radius of R ∼ 6 m. Phase I is designed with moderate gain aimed at exploring steady-state scenarios with DEMO relevant plasmas. One operating mode with higher magnetic field and conservative physics is presented, which could serve as a backup CFETR baseline in case of shortfall in physics performance. Phase II targets high gain with power plant relevant requirements and objectives, including more than 1 GW of fusion power, high fusion gain for DEMO validation and more ambitious assumptions based on advanced physics. A system analysis code, General Atomics System Code (GASC) [R. Stambaugh, V. Chan, et al., Fusion nuclear science facility candidates, Fusion Sci. Technol., 59 (2001) 279–307] is used to evaluate key parameters of scenarios for both phases.