Induced nuclear reactions: processes – systems – and elements – Handling of fission reactor component structure within...
Patent
1993-10-12
1994-09-13
Wasil, Daniel D.
Induced nuclear reactions: processes, systems, and elements
Handling of fission reactor component structure within...
376313, 210237, 414146, G21C 1900
Patent
active
053475542
ABSTRACT:
An improved tool for removing a highly contaminated outer filter from a control rod drive during a maintenance operation. The tool slides onto the control rod drive and surrounds the outer filter with a shield. The shield has a window for removing the screws used to mount the outer filter on the control rod drive. The tool has a support for the spud on the inside thereof. A U-shaped handle is slidably inserted into guideways so that it interlocks with circumferential slots in the shield. The arms of the inserted U-handle latch underneath the ring flange of the outer filter, whereby the outer filter is captured by the tool. The filter-mounting screws are then removed by unscrewing through the aligned window in the shield. Thereafter, the outer filter is removed from the CRD when the outer filter removal tool is lifted.
REFERENCES:
patent: 3838289 (1974-09-01), White
patent: 4572710 (1986-02-01), Stock et al.
patent: 5017330 (1991-05-01), Hurdiel
GE Manual, "Control Rod Drive-Model 7RDB144B", pp. 3-5, May 1971.
Ortega Frank
Pulpan Edward J.
Saxon Edward W.
Tsukida Robert S.
White Thomas W.
Beulick J. S.
General Electric Company
Wasil Daniel D.
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