A bottom supported main vessel of FBR is a complicated structure consisting of three cylindrical shells, two conical shells, two complicated heads, a heavy rotating plug, a core support structure and two support rings.

• 底部支撑的快堆主容器是由3个圆筒、2个圆锥壳、2个形状复杂的封头、1个大旋塞、1个堆芯支承结构和2个支承环组成的复杂结构。