Device and method for retaining a linearly movable element in a

Details Device and method for retaining a linearly movable element in a Device and method for retaining a linearly movable element in a

1985-12-26

1988-06-28

Kyle, Deborah L.

Induced nuclear reactions: processes, systems, and elements

With control of reactor

By movement of control element or by release of neutron...

376233, G21C 712

Patent

active

047537698

ABSTRACT:
Device and method for retaining a linearly movable element in a nuclear reactor. The device comprises, for each shaft, a base fixed to the top part of the reactor internals and coaxial with a shaft guide tube; several grippers or catches spaced apart about the axis of the base and mounted for pivotal movement about a horizontal axis towards a position into and out of engagement with a portion, having circumferential grooves, of the shaft contained in the tube; a slide movable axially on the base towards a top position where it causes engagement of the catches in a groove of the rod, and out of such position; and springs bearing on the base and tending to engage the catches on the shaft. The slide is dimensioned so as to be held by the corresponding sleeve projecting through the reactor vessel cover in a position sufficiently distant from the low position for the catches to be released, whatever the temperature in the reactor.

REFERENCES:
patent: 3050943 (1962-08-01), Thorel et al.
patent: 3251278 (1966-05-01), Royster
patent: 3572161 (1971-03-01), Lichtenberger et al.
patent: 3580805 (1971-05-01), Handel
patent: 3902963 (1975-09-01), Bertone et al.
patent: 3941653 (1976-03-01), Thorp
patent: 4544521 (1985-10-01), Millot et al.

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