Nuclear reactor control apparatus

Induced nuclear reactions: processes – systems – and elements – With control of reactor – By movement of control element or by release of neutron...

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376238, G21C 708

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active

044118570

ABSTRACT:
Nuclear reactor safety rod release apparatus comprises a ring which carries detents normally positioned in an annular recess in outer side of the rod, the ring being held against the lower end of a drive shaft by magnetic force exerted by a solenoid carried by the drive shaft. When the solenoid is de-energized, the detent-carrying ring drops until the detents contact a cam surface associated with the lower end of the drive shaft, at which point the detents are cammed out of the recess in the safety rod to release the rod from the drive shaft. In preferred embodiments of the invention, an additional latch is provided to release a lower portion of a safety rod under conditions that may interfere with movement of the entire rod.

REFERENCES:
patent: 2894779 (1959-07-01), Kushner et al.
patent: 3448006 (1969-06-01), Fortescue et al.
patent: 3715269 (1973-02-01), Mehren
patent: 3762994 (1973-10-01), Kunzel
patent: 3905634 (1975-09-01), Johnson et al.
patent: 3941413 (1976-03-01), Johnson et al.
patent: 4124442 (1978-11-01), Zhuchkov et al.
patent: 4181569 (1980-01-01), Ingham
"Fast Reactor Technology: Plant Design," M.I.T. Press (1966) Yevick et al., pp. 626-627.

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