Measurement of radiation image in Hamadori area of Fukushima Prefecture

Kawahara, Rika*; Ochi, Kotaro; Yamaguchi, Katsuhiko*; Torii, Tatsuo*

no journal, , 

Currently, decontamination activities are being carried out in the Hamadori area, but it is difficult to make comprehensive measurements with portable survey meters. Therefore, there is a need for a technology to measure radiation distribution with a simple measuring device. In a previous study, radiation distribution was measured using a Compton camera capable of omni-directional measurement, which enabled a quick and simple evaluation of the location of hotspots at the measurement points. However, the distribution map obtained was a two-dimensional image and the distance to the hotspot could not be determined. The aim of this study was to create a three-dimensional image of the radiation distribution by combining radiation and optical images. The Compton camera will enable the identification of the sources of exposure of the population, as it will confirm not only the environmental radiation distribution but also the indoor radiation measurements.