Background Tritium Concentrations of River and Lake Waters in Japan
Background Tritium Concentrations of River and Lake Waters in Japan
复制标题
日本河流和湖泊水中的氚浓度背景
DOI：
10.13182/fst08-a1815
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发表时间：
2008
影响因子：
0.9
通讯作者：
Y. Maeda
中科院分区：
文献类型：
--
作者：
S. Sugihara;A. Hirose;N. Momoshima;Y. Maeda
摘要目前大气中的氚浓度是核试验前的天然氚浓度。据观察，核电站、核后处理厂和聚变设施是另一个发生源。因此，为了评估核设施和从氚含量较高的大陆长途运输的影响，有必要调查氚的本底水平。采用低本底液闪测量系统结合固体聚合物电解质电解法测定了日本34条河流沃茨和6个湖泊沃茨中的氚浓度。河水和湖水的氚浓度分别为0.36-2.66 Bq/l（平均1.06±0.60 Bq/l）和0.48-1.43 Bq/l（平均0.81±0.37 Bq/l）。整体平均值为1.03±0.57 Bq/l。该平均值等于1982年测量的平均值的43%。可以将11年计算为表观半衰期。
Abstract The levels of tritium in the atmosphere nowadays are those of natural origin before the nuclear test. Nuclear power stations, nuclear reprocessing plants and fusion facilities are observed as a further occurrence source. Then, in order to appraise the influence of nuclear facilities and long distance transport from the continent where tritium level is relatively high, it is necessary to investigate background levels of tritium. Tritium concentrations of 34 river waters and 6 lake waters in Japan were determined by low background liquid scintillation measurement system combined with the electrolysis using solid polymer electrolyte. Tritium concentrations of river and lake water were 0.36-2.66 Bq/l (average 1.06±0.60 Bq/l) and 0.48-1.43 Bq/l (average 0.81±0.37 Bq/l), respectively. The entire mean value was 1.03±0.57 Bq/l. This mean value equals 43% of the mean value which was measured in 1982. It was possible to calculate 11 years as an apparent half-life.