Method for assembling nuclear fuel assembly and apparatus theref

Details Method for assembling nuclear fuel assembly and apparatus theref Method for assembling nuclear fuel assembly and apparatus theref

1992-11-05

1994-06-07

Walsh, Donald P.

Induced nuclear reactions: processes, systems, and elements

Handling of fission reactor component structure within...

Fuel component

376269, 29701, G21C 1900

Patent

active

053196848

ABSTRACT:
There are disclosed an assembling apparatus and an assembling method of a nuclear fuel assembly by which flaws or scratches to be formed on the surfaces of the fuel rods can be reduced. The fuel rods are inserted into the grid cells of the supporting grids under the state where the supporting grids are disposed in proximity to each other. Therefore, it is possible to remarkably reduce the fall-down movement of the tip portion of the fuel rod. Conventionally, the tip portion or lower surface of the fuel rod inevitably comes in contact with the grid cell of the supporting grid, so that the scratches might be formed on the surface of the fuel rod, which deteriorates the quality of the fuel assembly. However, according to the present method and apparatus, it is possible to avoid the interference between them so that the scratches to be formed on the surface of the fuel rods can be reduced remarkably.

REFERENCES:
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patent: 4800061 (1989-01-01), Shallenberger et al.
patent: 4895695 (1990-01-01), Shallenberger et al.
patent: 5251243 (1993-10-01), Nylund et al.
Patent Abstracts of Japan, vol. 14, No. 565, (P-1143), Dec. 17, 1990, JP-A-02 242 194, Sep. 26, 1990.

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