As part of monitoring activity of the surrounding environment, we conducted
an analysis of plutonium contained in the soil collected on March 21 and 22
at the 5 spots in Fukushima Daiichi Nuclear Power Station. As a result,
plutonium 238, 239 and 240 were detected.
(Previously announced)
As a result of plutonium analysis in the soil from the samples at the 3
periodic sampling spots collected on August 1, plutonium 238, 239, and 240
were detected as shown in the attachment 1.
In addition, as a result of nuclide analysis of the gamma ray contained in
the soil, radioactive materials were detected as shown in the attachment 2.
And, as a result of uranium analysis in the soil from the samples at the 3
periodic sampling spots collected on June 13 and 20, plutonium and uranium
was detected. Therefore, we conducted further analysis for americium and
curium in the soil. As a result, americium 241, curium 242, 243 and 244
were detected as shown in the attachment 3 and 4.
Today, we informed the Nuclear and Industrial Safety Agency and the
government of Fukushima Prefecture of the results.
We will continue conducting the similar analysis.
Attachment 1: Fukushima Daiichi Nuclear Power Station: Plutonium analysis
result in the soil(PDF 13.7KB)
Attachment 2: Result of gamma ray nuclide analysis of soil - Fukushima
Daiichi Nuclear Power Station(PDF 10.6KB)
Attachment 3: Fukushima Daiichi Nuclear Power Station: Am and Cm analysis
result in the soil(June 13)(PDF 12.8KB)
Attachment 4: Fukushima Daiichi Nuclear Power Station: Am and Cm analysis
result in the soil(June 20)(PDF 12.7KB)