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BOOKLET to Provide Basic Information Regarding Health Effects of Radiation (1st Edition)
Chapter 7 Environmental Monitoring 7.8 Radiation Monitoring of Ocean

Radioactivity Concentrations in Seawater and Sea-bottom Soil

Radioactivity Concentrations in Seawater and Sea-bottom Soil_Figure

Since October 2011, radiation monitoring of radioactive cesium (Cs-137) in seawater and sea-bottom soil has been conducted jointly by the Ministry of Education, Culture, Sports, Science and Technology (MEXT) (at that time), Secretariat of the Nuclear Regulation Authority (at present), Fisheries Agency, Japan Coast Guard, Japan Meteorological Agency, Ministry of the Environment (MOE), Fukushima Prefecture and TEPCO. With regard to samples collected near outlets, analysis has been conducted not only for radioactive cesium, but also for radioactive iodine (only for seawater samples), radioactive strontium, plutonium, and tritium (only for seawater samples).

  • Included in this reference material on March 31, 2013
  • Updated on March 31, 2017
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