Journal
SCIENCE OF THE TOTAL ENVIRONMENT
Volume 409, Issue 22, Pages 4885-4888Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.scitotenv.2011.07.067
Keywords
Radioactivity ratio; Fukushima Daiichi Nuclear Power Plant; Soil; Cesium-137; Cesium-134; Iodine-131
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Soil samples at different depths (0-2, 5-7 and 10-12 cm) were collected from J Village, about 20 km south of Fukushima Daiichi Nuclear Power Plant (FNPP) to determine their radionuclide specific activities and activity, ratios. The concentrations and activity ratios of (131)I (134, 136, 137)Cs and (129m)Te were obtained, but only trace amounts of (95)Nb, (110m)Ag and (140)La were detected which were too low to provide accurate concentrations. Radionuclides such as (95)Zr, (103, 106)Ru and (140)Ba that were found in Chernobyl fallout, were not found in these soil samples. This suggests that noble gasses and volatile radionuclides predominated in the releases from FNPP to the terrestrial environment. The average activity ratios of (131)I/(137)Cs, (134)Cs/(137)Cs, (136)Cs/(137)Cs and (129m)Te/(137)Cs were 55, 0.90, 0.22 and 4.0 (corrected to March 11, 2011) in the 0-2 cm soil samples of April 20 and 28, 2011. (C) 2011 Elsevier B.V. All rights reserved.
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