| 摘要 |
PROBLEM TO BE SOLVED: To construct simply an equipment structure for executing installation of a radiation source easily and quickly by positioning the radiation source at a measuring position set in the vicinity of a sensor for neutron detection, on the occasion of calibration, and at a base position set for the occasion other than the calibration and by controlling transfer and positioning of the radiation source, and thereby to improve the operability sharply. SOLUTION: A radiation source 10 is transferred to a measuring position Y set in the vicinity of a neutron sensor 5, on the occasion of calibration, and to a base position X set for the occasion other than the calibration. In order to position the radiation source to the measuring position Y and the base position X, a radiation source moving part 20 is provided. The transfer and positioning of the radiation source 10 are controlled by a radiation source control means 25. According to this constitution, an equipment structure for executing installation of radiation source easily and quickly is constructed simply and thereby the operability is improved, while a disadvantageous state of affairs in terms of a radiation control, such as external and internal exposures of an operator, can be avoided without fail.
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