Mapping and modelling of radionuclide distribution on the ground due to the Fukushima accident.
A large-scale environmental monitoring effort, construction of detailed contamination maps based on the monitoring data, studies on radiocaesium migration in natural environments, construction of a prediction model for the air dose rate distribution in the 80 km zone, and construction of a database to preserve and keep open the obtained data have been implemented as national projects. Temporal changes in contamination conditions were analysed. It was found that air dose rates above roads have decreased much faster than those above undisturbed flat fields. Further, the decreasing tendency was found to depend on land uses, magnitudes of initial dose rates and some other factors.
Fukushima Environmental Safety Center, Japan Atomic Energy Agency, Uchisaiwai-cho 2-2-2, Chiyoda-ku, Tokyo 100-5877, Japan saito.kimiaki@jaea.go.jp.
Kimiaki
K
Saito
D000396:Air Pollutants, Radioactive / Q000032:analysis*; D002588:Cesium Radioisotopes / Q000032:analysis*; D062406:Fukushima Nuclear Accident; D006801:Humans; D008962:Models, Theoretical; D011829:Radiation Dosage; D011834:Radiation Monitoring
D000396:Air Pollutants, Radioactive; D002588:Cesium Radioisotopes