[1A01-04] Measurement Technique

[1A04] A rapid-detection method for radioactive cesium in the air

- Results of demonstration test in the 'difficult-to-return zone' -

*Tatsuyuki Maekawa¹, Yuji Oshima¹ (1. Toshiba Power Systems Radiation Techno-Service Co., Ltd.)

Keywords:Radioactive concentration in the atomosphere, Radioactive cesium, Rapid detection, Monitoring, Gamma-ray, Spectrometer, Difficult-to-return zone

We have proposed a rapid-detection method for radioactive cesium in air. In this time, we conducted the demonstration test in the ‘difficult-to-return zone’. As a result, the influence of environmental fluctuations on the detection performance was extremely small, and it was confirmed that 3 to 4 minutes measurement can realize the detection of 30 Bq/m3 even in the zone.