Induced nuclear reactions: processes – systems – and elements – Handling of fission reactor component structure within...
Patent
1992-08-19
1993-09-07
Wasil, Daniel D.
Induced nuclear reactions: processes, systems, and elements
Handling of fission reactor component structure within...
29723, 2940208, G21C 1900
Patent
active
052436314
ABSTRACT:
An apparatus and method are provided for servicing an irradiated nuclear control rod underwater in a reactor building servicing pool. A turntable containing a plurality of spaced apart tools is positioned adjacent to the control rod. A first tool aligns the turntable relative to the radioactive roller mounted to the control rod by a radioactive pin therethrough. The turntable is indexable to position a second tool adjacent to the radioactive roller and pin, with the second tool being effective for freeing the radioactive pin from the control rod. The turntable is indexable for positioning a third tool adjacent to the radioactive roller and pin for removing the radioactive pin and the roller from the control rod. In further embodiments of the invention the turntable is further indexable for positioning a fourth tool adjacent to the control rod for reaming the pin aperture through which the radioactive pin was mounted. The turntable further includes a fifth tool which is indexable into position adjacent to the control rod for inserting a replacement roller and replacement pin therein. The replacement pin is secured to the control rod by a sixth tool supported on the turntable which is also indexable into position.
REFERENCES:
patent: 4400346 (1983-08-01), Aisaka et al.
patent: 4462957 (1984-07-01), Fukui et al.
Cearley James E.
Erbes John G.
Garbett Matthew G.
Punches James R.
Beulick J. S.
General Electric Company
Wasil Daniel D.
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