湘江衡阳段水体总α、β放射性水平调查与评价

Investigation and Evaluation of Total Radioactivity of Water Body in Xiangjiang River Basin in Hengyang

目的对湘江衡阳段水体中总放射性水平进行检测，并对数据进行放射卫生学评价。方法利用241Am和KCl作为总α、β放射性测量的标准物质，采用中等厚度相对测量法测量衡阳段湘江水中总放射性水平。结果水样中总α放射性水平为0．0012—0．058Bq／L，总β放射性水平为0．013—0．3742Bq／L，经方差分析，各水样间差异无统计学意义（P〉0．05）。结论水样中总α、总β放射性活度均低于国家标准限值，可知湘江衡阳段水体未受到人工放射性核素的污染。

Objective To investigate the total radioactivity level of water body in Xiangjiang River basin in Hengyang, and find the potential radiation contamination in time, and analyse the experimental datas with radiation hygiene method. Methods Using 241 Am and KC1 as the reference material for measurement to investigate the total radioactivity level of water body with the medium thickness relative measuring method. Results The radiation hygiene evaluation results show the values of the total α and β of water samples were 0. 0012 - 0. 058 Bq/L and 0. 013 - 0. 3742 Bq/L, respectively. And the variance analysis show that there was no significant differences between the various water samples （ P 〉 0.05 ）. Conclusion The radioactivity levels in water body of Xiang jiang river are within the normal natural background and the water environment of Xiangjiang river is not contaminated by radioactive nuclide.