Induced nuclear reactions: processes – systems – and elements – With control of reactor – By movement of control element or by release of neutron...
Patent
1993-05-26
1994-03-22
Walsh, Donald P.
Induced nuclear reactions: processes, systems, and elements
With control of reactor
By movement of control element or by release of neutron...
376217, 376258, 376247, G21C 706
Patent
active
052971740
ABSTRACT:
A safety system grade dropped rod detection system for a pressurized water reactor (PWR) utilizes core exit thermocouples arranged in multiple trains and hot and cold leg RTDs to generate a safety system grade rod stop signal. The system generates from the temperature signals a relative power deviation (RD) and a curvature index (CI), which is the spatial second derivative of RD for each fuel assembly. The CI signatures not only provide rapid, reliable detection of dropped control rods, but also clearly identify failed and failing thermocouples.
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"Detection of Thermocouple Malfunction in the Beacon System", Morita, et al., 1991 Specialist Meeting on Incore Instrumentation and Reactor Core Assessment Organization for Economic Cooperation and Development, Oct. 2, 1991, Pittsburgh, Pa.
Calvo Raymond
Heibel Michael D.
Impink, Jr. Albert J.
Morita Toshio
Valentine J. C.
Voss Frederick H.
Walsh Donald P.
Westinghouse Electric Corp.
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