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Report No.

Comparison of the Fukushima radioactive mapping by two different aerial radiation monitoring systems

Kim, B.-J.*; Sasaki, Miyuki; Sanada, Yukihisa  

A radiation monitoring system using unmanned aerial vehicles (UAVs) was developed for post-nuclear accidents by the Korea Institute of Nuclear Safety (KINS). JAEA has been conducted radiation monitoring in the Fukushima area and undertaking research and development of related technology. Considering future large-scale disasters, it is important that measurement methods using UAVs are unified between the neighbor countries. JAEA and KINS attempted technical collaborations to compare results obtained from different methods. In 2015, measurements were carried out around the Fukushima Dai-ichi Nuclear Power Station. Corrections to convert the coefficients from detectors in air to the radiation dose or radioactivity concentration on the surface were carried out in areas previously surveyed as flat and relatively evenly contaminated. Explorations of contamination mapping were conducted in river basins, with contaminants appearing in different water and soil contours, which were expected to make intuitive comparisons easier for multiple mappings. We used a Japanese unmanned helicopter, which is used for agricultural applications such as the spraying of pesticides. The measurement system of JAEA and KINS was installed and the same route was flown once in each case.



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