Induced nuclear reactions: processes – systems – and elements – Handling of fission reactor component structure within... – Fuel component
Patent
1992-10-21
1994-04-12
Walsh, Donald P.
Induced nuclear reactions: processes, systems, and elements
Handling of fission reactor component structure within...
Fuel component
376446, G21C 1900
Patent
active
053032721
ABSTRACT:
The present invention relates to an apparatus for manipulating the springs which hold the fuel rods firmly inside the grid cells of the grids in a nuclear fuel assembly. Conventionally fuel rods are inserted into the grids while the grid springs are in the active position, thus exposing the rods to possibilities of surface scratches and potential problems. The invented automatic apparatus avoids the formation of such surface damage on the fuel rods, by inserting the keys to inactivate the grid springs before inserting the fuel rods into the grids and removing the keys after all the rods are in place. The apparatus thus contributes to efficient manufacturing of the fuel assembly by simplifying the key quantity management operations and other tasks associated with the assembling operations.
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patent: 4729867 (1988-03-01), De Mario
patent: 5068081 (1991-11-01), Oyama et al.
patent: 5133927 (1992-07-01), Kadano et al.
Oyama Junichi
Sando Akio
Yamazaki Shuji
Chelliah Meena
Mitsubishi Nuclear Fuel Co.
Walsh Donald P.
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