Title:
REACTOR TRIP DEVICE
Document Type and Number:
Japanese Patent JPS57179691
Kind Code:
A
Abstract:
Each parameter of the processes of the nuclear reactor and of the components of a power supply which convert the thermal energy generated by the reactor into electrical power is monitored by a set of four like sensors. One each of the unlike sensors which monitor the different parameters is contained in a reactor-trip logic channel. Each such unlike sensor is referred to here as a "local sensor". Each channel is interlocked with the other three channels and receives the signals sensed by the other three sensors, herein called "remote sensors". Each channel also includes means for processing the signals from the local and remote sensors. The apparatus also includes means for tripping the reactor to deenergize or trip the control rod drive and insert the control rods fully into the core so that the reactor stops supplying power. The apparatus normally operates on a "two out of four" configuration. This assumes that all sensors are in normal operating condition. To achieve this purpose, eight circuit breakers are provided. Two breaker contactors are controlled by each channel. The control is through the undervoltage relays of the respective breakers. To trip the reactor, it is necessary that at least four breaker contactors be opened by operation of two channels.
Inventors:
BURUUSU MAIKERU KUTSUKU
Application Number:
JP5837082A
Publication Date:
November 05, 1982
Filing Date:
April 09, 1982
Export Citation:
Assignee:
WESTINGHOUSE ELECTRIC CORP
International Classes:
G05B23/00; G06F11/00; G21C7/00; G21C7/36; G21C9/00; G21C9/02; G21C17/00; G21D3/00; G21D3/06; G06F11/18; (IPC1-7): G21C7/00; G21C17/00