Fuel Assembly
AssigneeHitachi, Ltd.
InventorsKiyoshi FUJIMOTO, Takuji NAGAYOSHI, Hajime FURUICHI, Takeshi MITSUYASU
Life of this patent
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Abstract
A fuel assembly comprising includes an end plug, a tie plate, and a cylindrical plate. The cylindrical plate includes a protruding spring and a plurality of support protrusions on an outer side of the cylindrical plate such that the protruding portion and the plurality of support protrusions face an inner wall surface of the tie plate. The protruding spring, the plurality of support protrusions, and an inner wall of an insertion hole formed in the tie plate constitute a support structure configured to support the end plug in a lateral direction.
Claims8
A fuel assembly comprising:
- an end plug disposed on both upper and lower end portions of a fuel rod;
- a tie plate that supports at least an upper portion of the end plug;
- and
- a cylindrical plate disposed around the end plug and having a cylindrical or polygonal cross section, wherein
- the cylindrical plate is disposed on and fixed to the end plug by inserting the end plug in the cylindrical plate and bring the cylindrical plate into contact with the end plug,
- the cylindrical plate includes a protruding spring and a plurality of support protrusions on an outer side of the cylindrical plate such that the protruding portion and the plurality of support protrusions face an inner wall surface of the tie plate, and
- the protruding spring, the plurality of support protrusions, and an inner wall of an insertion hole formed in the tie plate constitute a support structure configured to support the end plug in a lateral direction.
A fuel assembly comprising:
- an end plug disposed on both upper and lower end portions of a fuel rod;
- a tie plate that supports at least an upper portion of the end plug;
- and
- a cylindrical plate disposed around the end plug and having a cylindrical or polygonal cross section, wherein
- the cylindrical plate is disposed on and fixed to the end plug by inserting the end plug in the cylindrical plate and bring the cylindrical plate into contact with the end plug,
- the cylindrical plate includes a protruding spring and a plurality of support protrusions on an inner side of the cylindrical plate such that the protruding spring and the plurality of support protrusions face an outer surface of the end plug, and
- the protruding spring, the plurality of support protrusions, and the end plug constitute a support structure configured to support the end plug in a lateral direction.
Dependencies are inferred from the claim text.