Burnable poison rod for a nuclear reactor fuel assembly

Details Burnable poison rod for a nuclear reactor fuel assembly Burnable poison rod for a nuclear reactor fuel assembly

1981-04-30

1984-07-17

Behrend, Harvey E.

Induced nuclear reactions: processes, systems, and elements

Control component for a fission reactor

376412, 376447, 138149, 138113, 403371, 403372, G21C 710

Patent

active

044605404

ABSTRACT:
A burnable poison rod for use in a nuclear reactor fuel assembly which includes concentrically disposed rods having an annular space therebetween which extends the full length of the rods. The inner rod is hollow to permit circulation of coolant therethrough. Annular burnable poison pellets are positioned in the annular space which is closed at both ends by plugs. A spring clip is located in the plenum space above the pellet stack in the rods. The spring clip is of cylindrical configuration having a gap in the material which provides two ends adapted to be squeezed toward each other. A cross section of the clip shows that its ends contain alternating flat and round edges, the round edges conforming to the outer rod inner surface to provide a retentive force which is releasably applied to the pellet stack as it grows during operation in a reactor.

REFERENCES:
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patent: 2438163 (1948-03-01), Haling
patent: 2727761 (1955-12-01), Elliott et al.
patent: 3507525 (1970-04-01), Sable
patent: 3510398 (1970-05-01), Wood
patent: 3635501 (1972-01-01), Thomsen
patent: 4080253 (1978-03-01), Gesinski
patent: 4111748 (1978-09-01), Hayashi et al.

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