(ii) Distribution of ambient dose rates in the area surrounding TEPCO's Fukushima Daiichi NPS site
Through the implementation of decontamination efforts and the passage of time, ambient dose rate values in the area surrounding TEPCO’s Fukushima Daiichi NPS site have decreased from the levels immediately after the accident.
Distribution of Ambient Dose Rates within the 80-km Zone of TEPCO's Fukushima Daiichi NPS
In order to ascertain the changes in the effect of radioactive materials, an airborne monitoring survey is being conducted continuously within an 80-km radius from TEPCO’s Fukushima Daiichi NPS.
It was confirmed that ambient dose rates within the 80-km zone decreased over time both in areas showing higher dose rates (areas extending to the northwest of the NPS) and areas showing lower dose rates.
