Isotopic compositions of 236U, 239Pu, and 240Pu in ...
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Isotopic compositions of 236U, 239Pu, and 240Pu in ...
Oct 4, 2017 - The Fukushima Daiichi Nuclear Power Plant (FDNPP) accident in 2011 released huge amounts of radionuclides into the terrestrial environment ...
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Received: 23 June 2017 Accepted: 4 October 2017 Published: xx xx xxxx
Isotopic compositions of 236U, 239Pu, and 240Pu in soil contaminated by the Fukushima Daiichi Nuclear Power Plant accident Guosheng Yang1,2, Hirofumi Tazoe1, Kazuhiko Hayano3, Kumiko Okayama3 & Masatoshi Yamada1 Six years after the Fukushima Daiichi Nuclear Power Plant (FDNPP) accident, data for 236U and 236U/238U have remained limited to a few heavily contaminated samples. In the present study, activities of 236U, 239 Pu, and 240Pu, along with other U isotopes in 46 soil samples both heavily and lightly contaminated by this accident were measured by inductively coupled plasma–mass spectrometry (ICP-MS) and triple-quadrupole ICP-MS. The 236U activities and 236U/238U atom ratios in these soil samples were in the range of (0.469–24.4) × 10−5 Bq kg−1 and ((0.099–1.35) × 10−7), respectively. Higher 240Pu/239Pu atom ratios (0.245–0.312) and 238Pu/239+240Pu activity ratios (0.859–1.62) indicated Pu contamination originated from this accident and global fallout in some samples. For those soil samples along with black substances collected along roads in Fukushima Prefecture, high linear correlations were presented between 236U activities and 239+240Pu activities (Pearson’s r = 0.755, p
