Analysis and comparison of low activation characteristics of nuclear structural material SIMP steel

The activation properties of SIMP steel have been simulated within China Fusion Engineering Test Reactor (CFETR) water cooled ceramic breeder (WCCB) blanket. Supposing that the water cooled blanket uses SIMP steel, the simulation is conducted by coupling of the MCNP (Monte Carlo N-Particle Transport Code) and FISPACT activation code. The simulation results of specific activity, decay heat, contact dose rate and radiation damage of SIMP steel have been fully compared with other RAFM steel such as EUROFER-97, F82H and so on. The comparisons show that the SIMP has good activation performance corresponding to low activation performance of RAFM. It is conclusion that the SIMP can be chosen as one candidate structural material used for future fusion reactor blanket.