Isotopic compositions of 236U, 239Pu, and 240Pu in soil contaminated by the Fukushima Daiichi Nuclear Power Plant accident.

ABSTRACT: 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, 239Pu, 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 alon

SUBMITTER: Yang G 

PROVIDER: S-EPMC5648813 | biostudies-literature | 2017 Oct

REPOSITORIES: biostudies-literature