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Updates
Japan Atomic Energy Agency (JAEA) Projects
The Japan Atomic Energy Agency (JAEA) has developed extensive and detailed air dose rate maps since the accident at the TEPCO Fukushima Daiichi Nuclear Power Plant, making information on air dose rates available to the public.
This site provides measurement results on maps and visualizes their variation with time, using air dose rates measured by route buses in cooperation with Fukushima Prefecture and Kyoto University as well as car-borne survey and airborne monitoring.
One of the features of this project is that route buses equipped with Kurama-Ⅱ survey systems measure air dose rates in cities of Fukushima, Koriyama, Aizuwakamatsu, providing continuous and constant measurement results over the long term. This measurement method allows us to timely provide information on air dose rates in residential areas for the residents and local governments. Meanwhile, this project is expected to provide data necessary for refining migration models for radioactive materials, to visualize decontamination activities that will go into full-scale operation, and to assist in finding radioactive hot spots.
This site shows the visualized measurement result of air dose rates according to the following scales.
・0.1μSv/h or less: displayed in BLUE
・0.1μSv/h or more and 10.0μSv/h or less: Monitoring areas were divided into 1,024 with logarithmic scales and displayed in 1,024 colors between BLUE and RED
・10.0μSv/h or more: displayed in RED
Please note that colors used on this site differ from ones used by ministries, local governments, research institutes, and other organizations.
Illustration of measurement of air dose rates by route buses in Fukushima Prefecture
Measurement of Air Dose Rates by Route Buses in Fukushima Prefecture (30 buses, Nov. 2013-)
The Japan Atomic Energy Agency (JAEA), in cooperation with Fukushima Prefecture and Kyoto University, has measured air dose rates in Fukushima Prefecture by using 30 route buses equipped with KURAMA-II survey systems. Click the link below to view measurement results. Measurement methods are the same as used in “Measurement of Air Dose Rates by Route Buses in the Fukushima Prefecture (4 buses, Jan. 2013-)” above. Refer to This Page for measurement methods.
Points where the decontamination effect is found
By measurement of Air Dose Rates by Route Buses in Fukushima Prefecture, Air dose rate graphs of survey points where the decontamination effect is found are available here.
Database for Radioactive Substance Monitoring Data
We have published a variety of radioactive substance monitoring data collected by JAEA and other institutions. Learn from the link below.