Press Release (Nov 15,2011)
We had been studying to implement sampling surveys on the ocean soil, completed preparations and conducted the surveys on April 29, 2011. (Previously announced on May 3, 2011)
We conducted analysis for americium as well as curium because plutonium and uranium were detected from the ocean soil* sampled on September 8, 9, 12, 13, 15 and 25. As a result, Americium 241 was detected as shown in the appendix.
Today, we reported the results to NISA and the government of Fukushima Prefecture.
We will continuously conduct the same sampling surveys.
*The results of nuclide analysis for 3 major nuclides (I-131, Cs-134, Cs-137) were previously announced on September 9, 10, 13, 14, 16 and 26.
Detected Am-241 cannot be judged to be caused by the nuclear accident of this time for reasons below.
- Detected Pu-239 and 240 are within the range of past (FY1999 to FY 2008) analysis in the sea around Fukushima Daiichi Nuclear Power Station and Fukushima Daini Nuclear Power Station.
- Detected U-234, U-235 and U-238 are evaluated to be as same level as those exist in the natural environment
- Cm-242, Cm-243 and Cm-244, the nuclides that do not naturally exist, are not detected.
Published: November 16th, 2011 at 1:41 am ET