Probabilistic Safety Assessment Method for Sodium Fire of Sodium Cooled Fast Reactor

The sodium fire is a typical and distinctive hazard in sodium cooled fast reactor, which is probably one of the main contributors to the total reactor risks. In this paper, the methodology of fast reactor sodium fire risk assessment was studied, following the introduction of the sodium fire. The application of this technology in China Experimental Fast Reactor was explored, and the results show that the core damage frequency induced by the sodium fire in reactor hall is 1.19×10^-8/(reactor•year). After that, several key problems which need to be further researched in the future during the process of sodium fire probabilistic safety assessment were discussed.