Title: Results of the Research on Distribution of Radioactive Substances Discharged by the Accident at TEPCO’s Fukushima Dai-ichi NPP （PDF:5203KB）
Source: MEXT: Monitoring information of environmental radioactivity level
Date Published: April 20,2012
MEXT conducting the second investigation about the distribution status of radioactive substances
○Only a part of the results of I-131 analysis are obtained.
○Only 100 sampling points of Pu and Sr are analysed.
>> The radioactive substances contained in soil need further to be investigated for the detailed check of the diffusion condition of radioactive substances.
○The results of aerial monitoring indicate a relatively high dose rate in Tochigi, Gunma,
>> There is need to expand the area of soil survey.
○The accumulation status of the radioactive substances on the ground surface significantly change due to the influences of rain and storm, etc.
>> It is necessary to confirm the status on accumulation and migration of radioactive substances continuously.
Published: April 20th, 2012 at 6:54 am ET