Method and means for remote removal of guide balls from nuclear

Details Method and means for remote removal of guide balls from nuclear Method and means for remote removal of guide balls from nuclear

1987-07-14

1988-11-29

Jordan, Charles T.

Induced nuclear reactions: processes, systems, and elements

Handling of fission reactor component structure within...

30277, 30286, 83917, G21C 1900

Patent

active

047880279

ABSTRACT:
A punch mechanism for remote removal of guide balls from nuclear reactor control rods, includes attachment means for attaching the punch mechanism to means for reversibly lowering the punch mechanism over the top of one of the control rods. The mechanism includes a die and cylinder means operatively connected to the die for axially moving the die in a back-and-forth direction, a die block cooperating with the die, and guide means for self-aligning the punch mechanism so that the die and the die block are automatically aligned with one of the guide balls therebetween when the punch mechanism is lowered over the top of the control rod. When the punch mechanism is lowered into aligned position, activation of the cylinder means will cause the die to advance into the die block, thereby removing the guide ball from the control rod. The punch mechanism is then remotely raised above the control rod, rotated 90 degrees, and lowered to repeat the ball removal procedure. Two more repetitions effect removal of all four balls from the control rod. The procedure may be carried out while the control rod is positioned in a spent fuel pool. The rod may then be removed for crushing.

REFERENCES:
patent: 2529210 (1950-11-01), Butler
patent: 3815492 (1974-06-01), Simmers
patent: 4006527 (1977-02-01), Sivachenko
patent: 4257292 (1981-03-01), Faull
patent: 4434092 (1984-02-01), Mary
patent: 4633743 (1987-01-01), Ichikawa
patent: 4643845 (1987-02-01), Omote et al.
patent: 4648989 (1987-03-01), Klein
patent: 4747995 (1988-05-01), Bednarik et al.

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