Specific activity and activity ratios of radionuclides in soil collected about 20 km from the Fukushima Daiichi Nuclear Power Plant: Radionuclide release to the south and southwest
Specific activity and activity ratios of radionuclides in soil collected about 20 km from the Fukushima Daiichi Nuclear Power Plant: Radionuclide release to the south and southwest
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DOI：
10.1016/j.scitotenv.2011.07.067
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发表时间：
2011-10-15
影响因子：
9.8
通讯作者：
Shirakawa, Yoshiyuki
中科院分区：
文献类型：
--
作者：
Tagami, Keiko;Uchida, Shigeo;Shirakawa, Yoshiyuki
从福岛第一核电站（FNPP）以南约20公里的J村采集不同深度（0-2、5-7和10-12厘米）的土壤样品，测定其放射性核素比活度和活度比值。获得了 (131)I (134, 136, 137)Cs 和 (129m)Te 的浓度和活度比，但仅检测到痕量的 (95)Nb、(110m)Ag 和 (140)La，其浓度太低，无法提供准确的浓度。在切尔诺贝利沉降物中发现的放射性核素，如 (95)Zr、(103, 106)Ru 和 (140)Ba，在这些土壤样本中没有发现。这表明惰性气体和挥发性放射性核素在 FNPP 向陆地环境的释放中占主导地位。 4月份0-2 cm土样中(131)I/(137)Cs、(134)Cs/(137)Cs、(136)Cs/(137)Cs和(129m)Te/(137)Cs平均活度比分别为55、0.90、0.22和4.0(修正至2011年3月11日) 2011 年 20 日和 28 日。(C) 2011 Elsevier B.V. 保留所有权利。
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.