Study and optimization on tritium production performance of CFETR helium cooled solid breeder blanket

The helium cooled solid breeder blanket is one of the three candidate blanket concepts of Chinese Fusion Engineering Test Reactor (CFETR). Based on the concept of helium cooled solid breeder blanket proposed by Southwestern Institute of Physics, the three-dimensional neutronic model of CFETR helium cooled solid breeder blanket was established by Monte Carlo transport program MCNP5, and the effects of different geometric arrangement schemes and structural parameters on tritium breeding ratio (TBR) and the TBR in each blanket module were obtained. The results show that the optimized TBR reaches 1.177 and meets the requirement of tritium self-sufficiency. (authors)