Tool for lifting tie rod during shroud repair

Details Tool for lifting tie rod during shroud repair Tool for lifting tie rod during shroud repair

1995-09-22

1997-04-22

Wasil, Daniel D.

Induced nuclear reactions: processes, systems, and elements

Handling of fission reactor component structure within...

92 15, 292144, 294 90, 403324, G21C 1920

Patent

active

056235259

ABSTRACT:
A tool for lifting a tie rod off of the refueling floor and lowering the tie rod into the downcomer annulus of a boiling water reactor during a shroud repair operation. The tie rod lifting tool can be attached to the end of a strongback suspended from a hoisting cable or to the end of the cable itself. One embodiment of the tie rod lifting tool has redundant locking pins which interlock with corresponding holes formed in the end of the tie rod. The locking pins are moved out of locking engagement in response to actuation of respective pneumatic cylinders. The locking pins are latched so that the tie rod cannot be disengaged from the lifting tool unless the latches are first manually released by an operator using a handling pole.

REFERENCES:
patent: 3795420 (1974-03-01), Preston, Jr.
patent: 4283158 (1981-08-01), Takahata
patent: 5193431 (1993-03-01), Propsting et al.

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