Method for extracting a locking sleeve from a demountable guide

Details Method for extracting a locking sleeve from a demountable guide Method for extracting a locking sleeve from a demountable guide

1989-09-19

1992-02-25

Wasil, Daniel D.

Induced nuclear reactions: processes, systems, and elements

Handling of fission reactor component structure within...

Fuel component

29235, 294266, 376446, G21C 1932

Patent

active

050911422

ABSTRACT:
Each of the zones of the ferrule (25) comprising a radially projecting deformed part (29) is deformed by inward bending, so as to extract the deformed part (29) from a corresponding cavity (22) of the end block. The locking sleeve (20) is then extracted by exerting a pulling force on this sleeve (20) in the axial direction (ZZ') of the guide tube (4). Preferably, the ferrule (25) consists of cylindrical segments separated by slits arranged along the generatrices of the ferrule (25). A tool (31) is used to fold the segments of the ferrule (25) and to grip these segments so as to extract the locking sleeve (20). Extraction is performed underwater in a fuel storage well.

REFERENCES:
patent: 4292130 (1981-09-01), Viaud et al.
patent: 4617171 (1986-10-01), Feutrel
patent: 4631168 (1986-12-01), Shallenberger et al.
patent: 4664874 (1987-05-01), Shallenberger et al.

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