Analysis on tritium controlling of the dual-cooled lithium lead blanket for fusion power reactor FDS-II

A tritium flow model of the entire FDS-II blanket system was developed and the preliminary analysis on tritium permeation and extraction for FDS-II blanket system were done by using Tritium Analysis Software (TAS). The factors which affected tritium extraction and permeation were calculated and evaluated, such as tritium permeation reduction factor in blanket, proportion of LiPb flow in tritium extraction system and helium leakage rate, etc. The results of the presented analysis shows that further R&D efforts are still required to guarantee the tritium self-sufficient and safety, for example high quality tritium permeation barriers, efficiency of tritium extraction from LiPb and fabrication technology of the LiPb heat exchanger, etc.