Thermally responsive trigger devices and their use in shut-down

Details Thermally responsive trigger devices and their use in shut-down Thermally responsive trigger devices and their use in shut-down

1989-12-26

1991-09-24

Behrend, Harvey E.

Induced nuclear reactions: processes, systems, and elements

Control component for a fission reactor

Fuse actuated devices

G21C 708

Patent

active

050512293

ABSTRACT:
A thermally responsive trigger device comprises a closed bellows (14) having a filling of liquid metal and acting on a trigger (19) responsive to the free end of the bellows. The bellows and trigger are located at a temperature measuring location which is the coolant flow outlet (15) from a demountable sub-assembly vehicle (10) having a fuel unit (11) and a triggerable absorber unit (12). The outlet flowing coolant sweeps over the bellows (14) and once the expansion of the bellows exceeds a threshold a pin (26) and cam (28) at the free end of the bellows causes a plate (21) to move to release the absorber unit (12).

REFERENCES:
patent: 3976543 (1976-08-01), Sowa
patent: 3992257 (1976-11-01), Erp et al.
patent: 4139414 (1979-02-01), Guiggio et al.
patent: 4204909 (1980-05-01), Giuggio et al.

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