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Analysis of Time Series of the Ambient Dose Rates

机译:环境剂量率的时间序列分析

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Radioactive substances are diffused by meteorological effects and soil property or underground water. The movements affect the ambient dose rate slowly and with smoothing in the long term. We detect the phenomena at monitoring posts in Fukushima. The monitoring post measures the flux from radionuclides; therefore, we discuss relations between the flux and mass density. Time-decreasing of the flux is a function of convection-diffusion of carriers of the nuclides. At the same time, it is also a decay function of radionuclides. We discuss product of the two functions, and get an expression for the time series of radioactive contaminated grounds. By using the expressions, we research changes of typical contaminants in Fukushima. This indicates movements of radionuclides.
机译:放射性物质由于气象作用和土壤特性或地下水而扩散。从长远来看,运动会缓慢且平滑地影响环境剂量率。我们在福岛的监视哨所中发现了这种现象。监测站测量放射性核素的通量;因此,我们讨论了通量和质量密度之间的关系。通量的时间减少是核素载体的对流扩散的函数。同时,它也是放射性核素的衰减函数。我们讨论了这两个函数的乘积,并得到了放射性污染地面的时间序列的表达式。通过使用这些表达式,我们研究了福岛典型污染物的变化。这表明放射性核素的运动。

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