March 15, 2011, Takasaki Observatory, about 100 km from Tokyo, Japan. RADIONUCLIDES DETECTED AT THE COMPREHENSIVE NUCLEAR-TEST-BAN TREATY ORGANIZATION (CTBTO) OBSERVATORY STATION IN TAKASAKI (as of 30, May 2011) On March 15, 2011, the measurement of Cs137 was (Bq/m3) 5,644,666. ...As for the analysis of measurements of air trapped after March 15 at the Takasaki Observatory, in addition to radionuclides detected above, barium (Ba) -140 was detected. Activity concentrations of these radionuclides showed a first peak on March 15-16, a second on March 20-21, and a third on 29-30. Peaks are occasionally detected thereafter. Weather conditions such as wind and rainfall are believed to have influenced the second peak and thereafter. 3. The Takasaki Observatory also measures radionuclides in the form of noble gases. Since March 15, xenon(Xe)-133 was detected with its peak on the 21st. This also is believed to have come from the Fukushima nuclear power plant. As gases much denser than normal have penetrated into the detection devece, accurate concentrations can not be measured. This is why we indicated only the estimate figures. (Refer to Appendix for the transition of radionuclide particulate and noble gases.) via Paolo Scampa FULL REPORT -- bit.ly/ROj6tC ON MAP -- E is Takasaki; G is Tokyo
Posted on: Thu, 24 Apr 2014 13:24:12 +0000
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