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首页> 外文期刊>The Science of the Total Environment >Modelling radon progeny concentration variations in thermal spas
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Modelling radon progeny concentration variations in thermal spas

机译：模拟温泉中ra子体的浓度变化

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摘要

Radon and its short-lived progenies (~(218)Po, ~(214)Pb, ~(214)Bi and ~(214)Po) are well known radioactive indoor pollutants identified as the major radiation burden component of the thermal spa users. Monitoring of short-lived progeny concentration is of great importance for short-term dose estimations both for bathers and working personnel. A prediction model of the short-lived progeny concentration variations was developed and applied on published data of the thermal spas of Lesvos Island. The physical procedures involved were modeled in a set of differential equations describing radon progeny concentration variations on the basis of radon measurements. Published daughter data were fitted on model predictions adjusting non-measured parameters, e.g. attachment and deposition rate constants for attached and unattached progenies. Attachment rate constants were estimated between 50 and 200 h~(-1) while the deposition rate constants between 0.25 and 5 h~(-1) for attached progenies and 0.5 and 170 h~(-1) for the unattached ones. In addition, unattached ~(218)Po, ~(214)Pb and ~(214)Bi progenies were found to be shifted forward in respect to radon approximately 0.001 h, 0.05 h and 0.40 h respectively, while attached ~(218)Po, ~(214)Pb and ~(214)Bi progenies 0.05 h, 0.45 h and 0.65 h respectively.
机译：及其短寿命子代（〜（218）Po，〜（214）Pb，〜（214）Bi和〜（214）Po）是众所周知的放射性室内污染物，被认为是温泉使用者的主要辐射负担成分。短期寿命后代浓度的监测对于入浴者和工作人员的短期剂量估计非常重要。建立了短期子代浓度变化的预测模型，并将其应用于莱斯沃斯岛温泉的公开数据。涉及的物理程序以一组描述differential测量基础上ra子代浓度变化的微分方程建模。将已发布的子数据拟合到模型预测中，以调整未测量的参数，例如附着和未附着后代的附着和沉积速率常数。附着速率常数估计在50和200 h〜（-1）之间，而附着速率的子代的沉积速率常数在0.25和5 h〜（-1）之间，未附着子代的沉积速率常数在0.5和170 h〜（-1）之间。此外，发现未连接的〜（218）Po，〜（214）Pb和〜（214）Bi后代相对于ra分别向前移动了大约0.001 h，0.05 h和0.40 h，而附着了〜（218）Po ，〜（214）Pb和〜（214）Bi后代分别为0.05 h，0.45 h和0.65 h。

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