Nuclear reactor with a circulating primary coolant fluid by composite convection

The description is given of a fast neutron reactor with a suspended vessel, a primary circuit of the liquid metal filling the vessel circulating through the core in an ascending direction and a secondary circuit of a fluid brought into flow by pumps outside the reactor vessel. The primary and secondary fluids exchange heat in intermediate exchangers distributed on the periphery of the vessel. A deflector is placed around the core to deflect the liquid metal coming from the core so that the flow of primary fluid in the intermediate exchangers is carried out by natural convection