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Report No.

Development of a plutonium air monitor for emergency environmental monitoring

Kinouchi, Nobuyuki ; Oishi, Tetsuya ; Noguchi, Hiroshi; Yoshida, Makoto; Kato, Shohei; Ito, Katsuhito*

We have developed an air monitor which is possible to measure rapidly and sensitively the concentration of plutonium for the environmental monitoring at an accident of a nuclear reprocessing plant. The monitor is designed to collect airborne plutonium by drawing the ambient air through a filter and to detect the activity by alpha spectroscopy. The following two methods are equipped with the monitor: continuous measurement at atomospheric pressure and batch measurement at vacuum. The description of the air monitor and the results of performance test are reported.



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