Induced nuclear reactions: processes – systems – and elements – Handling of fission reactor component structure within... – Fuel component
Patent
1993-10-21
1995-03-07
Walsh, Donald P.
Induced nuclear reactions: processes, systems, and elements
Handling of fission reactor component structure within...
Fuel component
376446, G21C 1900
Patent
active
053965264
ABSTRACT:
An apparatus is presented for removing the inner and outer keys from a support grid of a fuel assembly automatically or by mechanical methods. The apparatus removes a line of keys from a loaded assembly inserted into a grid through an opening section of the grid to deflect the springs. Both ends of the keys are engaged with the engaging members, and one set of keys are rotated in one direction while the other set of keys are rotated in the opposite direction. The springs are then released to press on the fuel rods firmly in place between the springs and the dimples in the grid cell. The keys are removed from the grid by clamping or holding the keys and moving the keys together with the clamping/holding device in the key axis direction by operating the driving device until the keys are removed completely from the grid.
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Patent Abstracts of Japan, vol. 14, No. 525 (P-1132), Nov. 19, 1990, JP-A-02 221 890, Sep. 4, 1990.
Koiwai Taichi
Ohuchi Katsunori
Oyama Junichi
Yamazaki Shuji
Yoshida Masashi
Chelliah Meena
Mitsubishi Nuclear Fuel Co.
Walsh Donald P.
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