Cask
AssigneeMitsubishi Heavy Industries, Ltd.
InventorsKatsunari Ohsono, Toshihiro Matsuoka, Shinji Ookame
Life of this patent
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Abstract
In the cask, a shape within a cavity of a barrel main body is formed in a shape corresponding to an outer shape of a basket. The basket has a structure obtained by alternately piling up plate-like members vertically. A heat conducting plate is provided on an outer periphery of the plate-like member. Accordingly, since the basket and the cavity are in a state of being in contact state in a wide area, an efficiency of heat conduction is improved.
Claims12
A cask comprising:
- a basket having square shaped cross section, wherein cutting sections are provided in both edges of rectangular plate-like members having a neutron absorbing performance and said plate-like members are alternately piled up vertically in such a manner as to mutually insert said cutting sections to each other;
- a barrel main body which shields γ rays and forms an inner side of a cavity in a shape aligning with said basket;
- and
- a neutron shielding body arranged in an outer periphery of said barrel main body,
- wherein a spent fuel assembly is stored in each of cells of the basket inserted in said cavity.
A cask comprising:
- a basket having square shaped cross section, wherein a plurality of cells having a neutron absorbing performance and storing spent fuel assemblies are integrally cast;
- a barrel main body which shields γ rays and forms an inner side of a cavity in a shape aligning with said basket;
- and
- a neutron shielding body arranged in an outer periphery of said barrel main body,
- wherein a spent fuel assembly is stored in each of cells of the basket inserted in said cavity.
A cask wherein an inner side of a cavity in a barrel main body having a neutron shielding body in an outer periphery and shielding γ rays is formed in a shape corresponding to an outer shape of a basket having a square cross sectional shape constituted by a plurality of square pipes having a neutron absorbing performance in a state of inserting the square pipes within the cavity, a hollow dummy pipe having both ends closed is provided, a portion having a surplus thickness of the barrel main body within said cavity is formed in a shape corresponding to said dummy pipe, said dummy pipe is inserted within the cavity together with the basket in a state of being in contact with said square pipe, and a spent fuel assembly is received and stored within each of cells of the basket inserted within said cavity.
Dependencies are inferred from the claim text.