Americium-241 has a half life of 432.7 years.
And TEPCO really needs to work on its press releases.
| Press Release (Apr 27,2011) Detection of radioactive materials in the soil in Fukushima Daiichi Nuclear Power Station (5th release) |
As part of monitoring activity of the surrounding environment, we
conducted an analysis of plutonium contained in the soil collected on
March 21st and 22nd at the 5 spots in Fukushima Daiichi Nuclear Power
Station. As a result, plutonium 238, 239 and 240 were detected.
(previously announced)
As the result of the plutonium analysis in the soil from the sample from
the 3 periodic sampling spots on April 14th, plutonium 238, 239 and 240
were detected as shown in Attachment 1. In addition, as the result of
gamma ray nuclide analysis from the same sample, radioactive materials
were detected as shown in Attachment 2.
Besides, as the result of the americium and curium analysis in the soil
from 2 samples among the 3 periodic sampling spots in which plutonium was
detected on March 28th amerium 241 (?), curium 242, 243, and 244 were detected.
We have reported the results of analyses to the Nuclear and Industrial
Safety Agency and the government of Fukushima Prefecture.
We will continue to conduct the similar analysis.
Attachment1:Fukushima Daiichi Nuclear Power Station: Plutonium analysis result in the soil (PDF 9.3KB) Attachment2:Result of gamma ray nuclide analysis of soil (PDF 33.7KB) Attachment3:Fukushima Daiichi Nuclear Power Station: Am and Cm analysis result in the s (PDF 54.7KB) |
Source: TEPCO
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