Induced nuclear reactions: processes – systems – and elements – Seal arrangements
Patent
1986-02-06
1987-12-29
Kyle, Deborah L.
Induced nuclear reactions: processes, systems, and elements
Seal arrangements
376245, 376254, 376285, 376292, G21C 1700
Patent
active
047160047
ABSTRACT:
A thimble guide extender for use in a nuclear power plant provides a shielded passage beteewn the guide and the bottom nozzle of a fuel assembly to protect the thimble from turbulence. The extender includes a hollow element having an upper portion which contacts the bottom nozzle, a lower portion which extends around the sides of the thimble guide, and a thimble passage through which the thimble movably extends. In one embodiment the thimble passage is aligned with a channel in the thimble guide by being permanently attached to the bottom nozzle of the fuel assembly. For this purpose the hollow element is provided with locking fingers which extend into flow openings in the bottom nozzle. In another embodiment the thimble passage of the hollow element is aligned with the channel of the thimble guide by being operatively mounted on the thimble guide, with spring fingers having enlarged regions or with locking balls fitting into an annular groove in the thimble guide. The enlarged regions or locking balls are locked into place to prevent the extender from becoming detached.
REFERENCES:
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patent: 3235463 (1966-02-01), Sankovich
patent: 3816245 (1974-06-01), Bevilacqua
patent: 3867253 (1975-02-01), Gratton et al.
patent: 3971698 (1976-07-01), Wolff et al.
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patent: 4323428 (1982-04-01), Schallenberger et al.
patent: 4381284 (1983-04-01), Gjertsen
Gasparro Michael R.
Merkovsky Daniel
Abeles Daniel C.
Kyle Deborah L.
Wasil Daniel
Westinghouse Electric Corp.
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