A Knowledge-Sharing Activity on the Environmental Radiation Monitoring Results Affected by the Fukushima-Daiichi Nuclear Power Plant Accident at Tokai-Oarai Area in Ibaraki Prefecture

After the Fukushima-Daiichi Nuclear Power Station (1F) Accident in March 2011, the increase was significantly observed in a part of the result of the environmental radiation monitoring in Ibaraki prefecture. “The review meeting of the environmental effect from 1F accident” was established to discuss technically the fluctuation of monitoring data. The review meeting collected the monitoring data from the four nuclear operators, and discussed a fluctuating trend, 134Cs/137Cs activity ratio, and so on. In this report, the results of the dose rate and 137Cs in fallout, surface soil, flatfish and seabed sediment are introduced. Also the problem solving in the review meeting is introduced.