Design of the future 1500 MW fast reactor pit and analysis of the behaviour of the different solutions to accidental loadings

After recalling the design of the reactor pit based on that of Creys Malville, the present document describes a new design where the safety vessel is anchored in the reactor pit concrete. The behaviours of the safety vessel and of the pit under accidental situations such as leakage of primary sodium are thoroughly examined, pinpointing the main differences liable to affect the safety requirements. The preliminary studies conducted since 1980 as well as the future prospects are presented in this document