Patent ID: 9022189
Filing Date: 2015-05-05
Classification: G21F

Abstract:
1. A cask cushioning body attached to both ends of a cask storing therein spent fuel and absorbing an impact applied to the cask, the cask cushioning body comprising: an end-surface side member in which a plurality of plates made of steel are formed at a distance between plate surfaces of the plates that face each other, and in which the plate surfaces of the plates are arranged along an end surface of the cask; and a circumferential-surface side member that forms a cylindrical body made of the steel, one end of which is connected to a periphery of the end-surface side member, and that is arranged along an end-portion outer-circumferential surface of the cask, wherein an impact absorber that absorbs the impact by deforming is provided outside of the end-surface side member and the circumferential-surface side member; the cask cushioning body is formed so that a size between an outer circumferential surface of a lid constituting the cask and an inner circumferential surface of the circumferential-surface side member is larger than a size between an outer circumferential surface of a main body of the cask to which the lid is fixed and the inner circumferential surface of the circumferential-surface side member.