Inner filter removal tool

Details Inner filter removal tool Inner filter removal tool

1993-10-12

1995-01-03

Wasil, Daniel D.

Induced nuclear reactions: processes, systems, and elements

Handling of fission reactor component structure within...

376313, 210237, 294 94, G21C 1900

Patent

active

053793307

ABSTRACT:
An improved tool for removing the highly contaminated inner filter from a control rod drive during a maintenance operation. The tool may also be used to install the inner filter by pushing the inner filter on and locking the spring clip onto flats of the center lug of the control rod drive stop piston. The tool has a collet with flexible fingers which are inserted inside the inner filter while flexed radially inward. After the collet is inserted, a retractable cam with a conical bearing surface is retracted to a position whereat it urges the collet fingers radially outward to clamp the collet onto the inner filter. The locked filter must be rotated before removal. With the inner filter coupled to the collet, the tool is then pulled out to remove the inner filter from the control rod drive.

REFERENCES:
patent: 2719051 (1955-09-01), Hankins
patent: 3604746 (1971-09-01), Notari
patent: 3838289 (1974-09-01), White
patent: 4340249 (1982-07-01), Bucklew
patent: 4572710 (1986-02-01), Stock et al.
patent: 5017330 (1991-05-01), Hurdiel
GE Manual, "Control Rod Drive-Model 7RDB144B", Inner Filter Assembly Tool, p. 21, May 1971.

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