System for detection of process trip

Details System for detection of process trip System for detection of process trip

G - Physics

21

C

359/22

G21C 17/00 (2006.01) G21C 7/00 (2006.01) G21C 7/26 (2006.01) G21C 7/36 (2006.01) G21D 3/06 (2006.01)

Patent

CA 1094698

Case 2316 ABSTRACT OF THE DISCLOSURE It is desirable to be able to detect an emergency shutdown or "trip" of a process by independent means, that is without receiving a signal from the control means that initiates the trip. This is the case, for example, in a nuclear reaction process. The independent trip detection of this invention determines the rate of change of a parameter representative of the state of the process and provides a signal representing the rate of change. The signal is compared with a reference and if (a) the parameter has changed by a predetermined amount and (b) the rate of change has exceeded a predetermined level continuously for a period of time consistent with a process trip, then an output signal is provided indicative of a process trip having occurred.

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