Quick release latch for reactor scram

Details Quick release latch for reactor scram Quick release latch for reactor scram

1975-04-09

1976-03-02

Blunk, Evon C.

Handling: hand and hoist-line implements

Grapple

Well type

176 36C, 294 8615, 294 8629, 294 88, B66C 316, G21C 708

Patent

active

039414132

ABSTRACT:
A simple, reliable, and fast-acting means for releasing a control element and allowing it to be inserted rapidly into the core region of a nuclear reactor for scram purposes. A latch mechanism grips a coupling head on a nuclear control element to connect the control element to the control drive assembly. The latch mechanism is closed by tensioning a cable or rod with an actuator. The control element is released by de-energizing the actuator, providing fail-safe, rapid release of the control element to effect reactor shutdown. A sensing rod provides indication that the control element is properly positioned in the latch. Two embodiments are illustrated, one involving a collet-type latch mechanism, the other a pliers-type latch mechanism with the actuator located inside the reactor vessel.

REFERENCES:
patent: 3197378 (1965-07-01), Fortescue
patent: 3515639 (1970-06-01), Pflugrad
patent: 3733251 (1973-05-01), Gilbertson et al.
patent: 3801148 (1974-04-01), Rosgen et al.

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