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John C Kirtland, Age 83San Jose, CA
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San Jose, CA
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John Kirtland Wright
John Kirtland Wright (18911969) was an American geographer, notable for his cartography, geosophy, and study of the history of geographical thought.
Us Patents
Self-Test Subsystem For Nuclear Reactor Protection System
US Patent:
4517154, May 14, 1985
Filed:
Jul 27, 1982
Appl. No.:
6/402053
Inventors:
Ulric E. Dennis - San Jose CA
Dennis W. Hollenbeck - San Jose CA
John A. Kirtland - San Jose CA
Kenneth B. Stackhouse - San Jose CA
Patricia A. Wilson - San Jose CA
William D. Hill - San Jose CA
David D. Akers - Los Gatos CA
Elmer D. Hill - Sacramento CA
Dennis W. Hollenbeck - San Jose CA
John A. Kirtland - San Jose CA
Kenneth B. Stackhouse - San Jose CA
Patricia A. Wilson - San Jose CA
William D. Hill - San Jose CA
David D. Akers - Los Gatos CA
Elmer D. Hill - Sacramento CA
Assignee:
General Electric Company - San Jose CA
International Classification:
G21C 1700
US Classification:
376259
Abstract:
A self-test system for a nuclear power plant, nuclear reactor protection system is disclosed. Nuclear protection systems are the electronic controls, typically including circuit cards, located intermediate between sensors (as for detecting core overheat) and a control (as for providing rod injection to shut down a reactor). Constant surveillance of the nuclear system protection system is provided by a microprocessor that serially addresses protection system circuit cards and loads them at pre-determined input points with test commands. The addressed cards are thereafter simultaneously activated by a system-wide command. The test command is a pulse which is so short in duration that its affect is transparent to the system and cannot cause overall system operation. The pulse passes through the actuating electrical components to verify, on the real actuating path, the operating integrity of the system. After an appropriate response interval, the output state of the system is recorded in system-wide resident registers.
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