| 摘要 |
PROBLEM TO BE SOLVED: To provide a radiation monitor for making a range which requires corrosion preventing measure as small as possible in an apparatus, capable of measuring radioactivity, without making contact with an object to be measured and low in possibility of exposure. SOLUTION: The radiation monitor of exhaust gas is equipped with a sampling piping 2 connected to an exhaust duct 1 in a branched state, suction pump 3, dust collector 4, dust radiation detector 5, gas collector 6, gas radiation detector 7 and data processor 8. In the dust collector 4, exhaust gas is introduced into a tank 10 housing water 9, to collect dust and the radioactivity of the collected dust is detected and measured by dust radiation detector 5 which is arranged under the surface of the water 9.
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