| 摘要 |
PROBLEM TO BE SOLVED: To reduce the number of components and improve the reliability and monitoring the properties, by consolidating display the circuits of all sections to a single location, while securing the electric separation between sections in a safety system by optical transmission path. SOLUTION: Neutron flux measuring circuits 5P and 5S-1 to 5S-n are connected to the display circuits 6 through the optical transmission paths 12, and all sections and all channels can be monitored from a single location. An operation signal is transmitted from the display circuits 6 to the neutron flux measuring circuits 5P and 5S-1 to 5S-n of a target channel, the optical paths out of the section of the target channel are blocked by an optical transmission section change-over switch 11. The channels other than the target channel are blocked by by-pass state recognition optical switches 16P and 16S-1 to 16S-n. Furthermore, channel changeover optical switches 14P and 14S-1 to 14S-n of the target channel are turned on, and interlock circuits 15P and 15S-1 to 15S-n are turned on interlocked with this, and the channels other than the target channel is turned off. COPYRIGHT: (C)2009,JPO&INPIT
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