Surface sea water sampling was started

  • From June 2014, surface sea water sampling was started at two stations, Tomioka in Fukushima Prefecture and Hasaki in Ibaraki Prefecture. The samples will be collected twice a month at each station and 134Cs and 137Cs activity in the samples will be measured very precisely at Ogoya Underground Laboratory of Kanazawa University where a background is ultra low up to one hundredth of normal laboratory at ground level.
    A purpose of this observation is to make clear behaviors of radiocaesium at the coastal region of Fukushima and Ibaraki prefectures because the levels of radiocaesium in the specific fish species collected at this region are still exceeding the governmental regulation limit of 100 Bq kg-1 and small radiocaesium flux of ca. 10 GBq day-1 from the TEPCO Fukushima Daiichi NPP is still ongoing.
  • We will study our measurement results together with the results of radiocaesium behavior obtained by coastal ocean modeling. This study is collaborations among the scientists at the Institute of Environmental Radioactivity and other institutes/Universities.