Dose Estimation of Landfill Disposal of Removed Soil Generated Outside Fukushima Prefecture.

Dose estimation was conducted by assuming landfill disposal of removed soil generated outside the Fukushima Prefecture by each local town and in a lump sum. Because the radioactivity of removed soil is lower than that of specified waste that was generated at Fukushima Prefecture and the radioactivity concentration is 100,000 Bq kg-1 or less, simple landfill covered with 30 cm of non-contaminated soil was used. The exposure doses of loading/unloading, transportation, and landfill workers and the public residing near the repository site were estimated. Furthermore, migration of cesium into groundwater because of precipitation and using the contaminated groundwater for drinking and agricultural water was evaluated, and exposure doses regarding farmers and the ingestion of agricultural products were estimated. It was confirmed that estimated exposure doses during landfill were less than 1 mSv y-1, and those for after landfill were 0.01 mSv y-1.