| 摘要 |
PROBLEM TO BE SOLVED: To simplify operation, improve the space factor, maintainability in a reactor building and the reliability of components in the reactor building. SOLUTION: This device measures the heat of radiation absorption with a plurality of fixed type sensors 10 fixed in the reactor together with detectors detecting neutron flux level and measures neutron flux distribution by using measured signals output from the fixed type sensors 10 and calibrates the sensitivity. Also, a plurality of processing parts 13 for multiplexers selectively taking in the measured signal outputs from the plurality of fixed type sensors 10 and converting to transmission data of specific form, and heater controlling parts 30 controlling the temperatures of the plurality of heaters 11 placed inside the reactor for calibrating the fixed type sensors 10 are provided inside the reactor building 2. And a signal processing part 40 for receiving the transmission data from the multiplexer parts 13 and monitoring the measured signals of the fixed sensors 10 is provided in the central control room outside the reactor building.
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