Preliminary Neutronics and Activation Analysis of the Water Cooled Solid Breeder Blanket for CFETR

Abstract

China Fusion Engineering Test Reactor is an “ITER-like” superconducting tokomak reactor. It’s necessary to assess the neutronics parameters, such as tritium breeding ratio, neutron wall loading and nuclear heating of the Water Cooled Solid Breeder (WCSB) blanket for its initial design. In this paper, the neutronics calculations were performed by using MCNP/4C code with the Fusion Evaluated Nuclear Data Library FENDL-2.0. The results show that the neutronics parameters can meet the engineering design requirement. Different source models affect the magnitude and distribution of the neutron wall loading and the nuclear heating were also discussed. The activation calculations were carried out by using FISPACT-2007 with the EAF-2007 library. Activity, afterheat and dose rate of the blanket form the beginning of shutdown to 106 years were presented. The results show that at shutdown the total activity of the equatorial outboard blanket module is 7.27 × 1016 Bq, and the total afterheat is 11.52 kW. These results will provide useful indications for further optimization of the WCSB blanket.