Induced nuclear reactions: processes – systems – and elements – Testing – sensing – measuring – or detecting a fission reactor...
Patent
1987-12-24
1988-11-29
Jordan, Charles T.
Induced nuclear reactions: processes, systems, and elements
Testing, sensing, measuring, or detecting a fission reactor...
33502, 33534, 33538, G21C 1700
Patent
active
047880260
ABSTRACT:
An inspection gage includes an expandable tubular member insertable within a fuel assembly guide thimble. The tubular member has embossments circumferentially spaced from one another about the tubular member and being the same in number as bulges on the guide thimble and configured to fit therewithin. An expansion member rotatably mounts the tubular member and is axially movable therewithin when the latter is inserted within the guide thimble. The expansion member is movable between a first position in which it permits inward contraction of the tubular member an displacement of its embossments away from the guide thimble bulges for removing the embossments from registry therewith and a second position in which it produces radial expansion of the tubular member and displacement of its embossments toward the guide thimble bulges for placing the embossments in registry therewith. A handle is used for rotating the tubular member relative to the expansion member so as to bring the embossments into alignment with the guide thimble bulges concurrently as the embossments are being displaced toward and into registry with the bulges. An indicator mechanism responses to rotation of the tublar member away from a reference position to provide an indication of the orientation of the guide thimble bulges relative to a reference point upon displacement of the embossments into registry therewith.
REFERENCES:
patent: 4716017 (1987-12-01), Kerrey
Jordan Charles T.
Wendtland Richard W.
Westinghouse Electric Corp.
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