Abstract
This reactor that was proposed since 2018 has Block Metal-Fuel (U-Pu-10%Zr) as Fuel-Core which involves no metallic structure. This paper proposes more improved this reactor with two types, the first type for Plutonium-breeding reactor, the second type for power plant. There is improving point, that is cooling temp. Change to inlet 480℃, outlet 720℃ to put down void swelling, and get enough cooling effect. Because Block Metal-Fuel of the first type(U-7.5%Pu-10%Zr) can endure 900℃. Because the self weight pressure load only exist. The first type has high density of heavy-metal (9000kg/m3)so that this reactor has high Plutonium-breeding capacity. The second type is simple fast reactor like as Toshiba 4S small reactor, but has Block Metal-Fuel as Fuel Core, and has high density of heavy-metal (8200kg/m3) is improved to have more power 250MWe and be able to produce Plutonium.
