Results of the program to develope guidelines for decontamination, 3; Demonstration project of decontamination at Heart Land Haramachi in Minami-soma city

Amazawa, Hiroya; Sakai, Akihiro ; Nakata, Hisakazu ; Miyahara, Kaname  ; Kihara, Shinji

JAEA performed decontamination experiments at a test site (Heart Land Haramachi) that combined a range of buildings and different types of land use, located in Minami Soma city as a field decontamination project in order to accumulate knowledge and data for full-scale decontamination. As a result of the decontamination that was performed using methods that can be easily implemented, taking into consideration the topography and land use of the target area, the average air dose rates were reduced to approximately one half of the values before decontamination. In addition, it was confirmed that, to reduce the exposure doses of people living in houses adjacent to a contaminated forest, a sufficient effect can be obtained by decontaminating the forest to a depth of 10 m from the forest boundary. For contaminated asphalt-paved roads, decontamination by shot blasting was effective.