Distribution of Radioactivity Concentration in the Marine Soil around Fukushima Dai-ichi NPP by TEPCO From April 2011 to November 2015 Tokyo Electric Power
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Summary of survey
TEPCO is conducting marine soil monitoring around TEPCO Fukushima Dai-ichi NPP since April 2011. In present, based on "Implemenation Guides on Sea Area Monitoring in FY2013", monitoring is conducted to figure out dispersion, deposition and migration of radioactive substances released into the environment. Samplings are conducted at the sea area close to TEPCO Fukushima Dai-ichi NPP (sampling points T-1 (north from the outlet for Reactor Units 5 and 6) and T-2-1 (south from the outlet of Reactor Units 1 to 4)) and the coastal area of Fukushima Prefecture. Sampling frequency is once or twice per two month. The data here was created based on the results of measurement.