Safety assessment for on-site storage of removed soil

Takai, Shizuka 

Removed Soils generated by decontamination after Fukushima Daiichi Nuclear Accident are stored on sites like schools, parks and houses where decontamination were carried out. The safety of on-site storage is assured under the control of Decontamination Guidelines. However, whether to enter or dig up the site depends on personal decision of landowners without safety evaluation. In this research, we calculated dose caused by entering or digging up of the site based on the present situation of on-site storage outside Fukushima. As a result, dose caused by entering the site is about one-hundredth of 1 mSv/y which is a safety standard in Decontamination Guidelines and also the dose limit for exposures of the public by ICRP. In addition, dose caused by digging up the site is around one-tenth of the dose limit.