System for operating a boiling water reactor steam turbine power

Registers – Transfer mechanism – Traveling pawl

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Details

176 19EC, 415 17, G06f 1556, G21c 736

Patent

active

039315037

ABSTRACT:
A combined digital computer/analog control system for operating a boiling water reactor-steam turbine-power plant wherein one of two analog throttle pressure controllers is used for controlling the inlet and bypass valves. One of the pressure controllers is biased to provide a higher signal than the other; and such nonbiased controller is the one selected to control the valves. Each controller includes a pressure transducer, a summing device and amplifier, and a lead/lag circuit together with the appropriate power supply.
A failure detection system is used to switch the controllers from automatic to manual when a predetermined combination of controller components becomes defective. Also, such system is so organized that a transducer failure for one controller causes the other controller to assume control regardless of whether such failure results in a higher or lower than proper signal.

REFERENCES:
patent: 3552872 (1971-01-01), Giras et al.
patent: 3572958 (1971-03-01), Jensen
patent: 3588265 (1971-06-01), Berry
patent: 3630839 (1971-12-01), Podolsky
patent: 3709626 (1973-01-01), Eggenberger

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