Method for assembling fuel assembly

Details Method for assembling fuel assembly Method for assembling fuel assembly

1994-04-20

1995-12-19

Bryant, David P.

Metal working

Method of mechanical manufacture

Assembling or joining

29906, B21D 3900

Patent

active

054759137

ABSTRACT:
A method of assembling a fuel assembly is presented so as to reduce radiation exposure to the assembly workers and to simplify the assembly procedure. Sleeves are pre-attached to an upper nozzle, and the guide pipes are inserted into respective grid cells through the sleeves of the upper nozzle and through the sleeves of the grids. The guide pipes are fixed in place to the sleeves of the upper nozzle and of the grids by bulging. There is no welding step necessary to join any of the assembly components while the assembly is in a semi-assembled condition. Therefore, the method is simple and efficient, and reduces the risk of radiation exposure to the assembly workers.

REFERENCES:
patent: 3791466 (1974-02-01), Patterson et al.
patent: 4229259 (1980-10-01), Vaill et al.
patent: 4638556 (1987-01-01), Shallenberger et al.
patent: 4653180 (1987-03-01), LePargneux et al.
Database WPI, Derwent Publications, AN 86-289101 & JP-A-61 212 796, Sep. 20, 1986.

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