Flux thimble removal tool

Details Flux thimble removal tool Flux thimble removal tool

1991-09-27

1992-12-22

Wasil, Daniel D.

Induced nuclear reactions: processes, systems, and elements

Handling of fission reactor component structure within...

83167, 83277, 83930, G21C 1900

Patent

active

051732491

ABSTRACT:
A flux thimble removal tool includes two basic units: a lower pulling unit 20 and a cutting/storage unit 22 which sits atop the lower pulling unit. Pulling unit 20 houses a gripper unit 30a, drive motor 68, gears 32, 66, helix drive shaft 40a, guide bar 26a, slide bar 24a, and guide tube 36, all of which are adapted to gradually extract neutron flux thimbles 38 one at a time from the reactor vessel 74 of a nuclear reactor, and to feed each thimble to the cutting/storage unit 22. The cutting/storage unit 32 further extracts the thimble, then severs the further extracted portion. The operation is continued until the thimble is fully extracted from the reactor vessel and reduced to a pile of easily-disposable segments.

REFERENCES:
patent: 4223581 (1980-09-01), Markiewicz
patent: 4377551 (1983-03-01), Adams
patent: 4664872 (1987-05-01), Kiewitz et al.

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