| 摘要 |
PROBLEM TO BE SOLVED: To materialize the accurate calibration of the reactor output measurement by a local output detector by packaging more than tenγray temperature gages in a high density in the longer direction of a detector assembly for the reactor output measurement device. SOLUTION: A plurality of local output detectors 21A, 21B, 21C and 21D are disposed in the inside of a local output detector assembly 2 at the center part in the radial direction in cross section of a detector assembly 1 to be disposed in the inside of an atomic reactor, meanwhile, a plurality ofγray temperature gages 301 through 3n (n is a natural number greater than 10) are disposed in the annular shaped space at its outer circumferential part. Thus as mentioned above, the inner diameter of the detector assembly 1 is effectively utilized, a great number (more than 10 each) of theγray gages are packaged in a high density. By this constitution, the distribution of each measured value by theγray temperature gages in place in the vertical direction can be made thick, and it is thereby materialized that the atomic reactor output measurement by the local output detectors can thereby be accurately calibrated.
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