Abstract: A shell-and-tube heat exchanger comprises a shell which houses a tubular core, with an array of heat transfer tubes uniformly spaced between the shell walls and the core, said heat transfer tubes being secured in an inclined upper tube plate and an inclined lower tube plate. The shell-and-tube heat exchanger of the present invention is characterized by that each tube plate is made up of separate trapezoidal sections with gaps therebetween, which gaps are intended for passage of a heat transfer agent in the axial direction into the intertubular space at the inlet and outlet portions of the heat exchanger, inlet and outlet collectors being connected to each section of the upper and lower tube plates, respectively, for the supply of the heat transfer agent into the heat transfer tubes.

Abstract: The herein proposed fast nuclear reactor comprises a vessel, a liquid metal coolant filling said vessel, the side wall of which is cylindrical in shape and has its axis disposed in a horizontal plane. The vessel accommodates a core and heat exchangers with said liquid-metal coolant being passed therethrough by means of forced circulation thereof. The space above the coolant level is occupied by an inert gaseous medium, with the coolant contacting said medium in pipe branches penetrating the side wall of the vessel.