Induced nuclear reactions: processes – systems – and elements – Handling of fission reactor component structure within...
Patent
1982-02-16
1985-06-11
Cangialosi, Sal
Induced nuclear reactions: processes, systems, and elements
Handling of fission reactor component structure within...
376272, G21C 1400
Patent
active
045227802
ABSTRACT:
To remove the bottom nozzle of a nuclear fuel assembly, the nozzle plate must be disconnected from the control-rod thimbles. For nozzles whose control-rod thimbles are connected to the nozzle plate by screw fasteners having lock pins welded to the nozzle plate, a cutter for severing the welds is provided. The cutter is rotated by a motor at the work position through a long floating shaft. A long feed shaft operated by a thumb nut at the work position feeds the floating shaft and cutter downwardly through the weld. The bushings extend from a bushing plate, each encircling a screw fastener. Each bushing has a yieldable sleeve for sealing the region around a screw fastener to trap the chips from the severed weld. The cutter is indexed from weld to weld by indexing plates. To remove chips adhering to the cutter, the suction tube of a suction-pump-operated eductor is inserted in the auxiliary hole and the cutter is inserted in the bushing and chips are removed by suction. By inserting the suction tube into the bushings which seal the regions around the screw fasteners and enabling the eductor, the captured chips may be removed. Once the welds are severed the screw-fasteners may be unscrewed and removed by the eductor. The bottom nozzle may then be removed.
REFERENCES:
patent: 3887980 (1975-06-01), Yates et al.
patent: 3914613 (1975-10-01), Shallenberger et al.
patent: 3968008 (1976-07-01), Piepers et al.
patent: 4079620 (1978-03-01), Jester et al.
patent: 4290906 (1981-09-01), Saito et al.
patent: 4292130 (1981-09-01), Viavd et al.
patent: 4336103 (1982-06-01), Katscher et al.
patent: 4377551 (1983-03-01), Adams
patent: 4385535 (1983-05-01), Tedder
patent: 4428903 (1984-01-01), Kasik et al.
Ferlan Stephen J.
Shallenberger John M.
Cangialosi Sal
Erickson D. E.
Westinghouse Electric Corp.
LandOfFree
Removal and replacement of fuel rods in nuclear fuel assembly does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Removal and replacement of fuel rods in nuclear fuel assembly, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Removal and replacement of fuel rods in nuclear fuel assembly will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1182316