摘要
目的对南水北调东线山东段通水前沿线流域的放射性本底水平进行评价。方法使用国家颁布的标准方法测量样品中的总α、总β、^137Cs、^40K、^238U、^226Ra、^232Th、^90Sr的放射性活度浓度，并运用UNSCEAR 2000报告书剂量转换系数进行待积有效剂量估算。结果对南水北调山东段通水前沿线流域的放射性水平数据资料进行了汇总，并估算每年摄入湖区水中^226Ra、^238U、^90Sr、^232Th和^137Cs所致当地居民待积有效剂量分别为1．46、4．95×10^-1、1．24×10^-1、2．58×10^-2和7．93×10^-3μSv；每年摄入湖区鲤鱼中的放射性核素所致居民待积有效剂量较高的为^226Ra、^238U和^90Sr，分别为5．49×10^-2、3．69×10^-2和1．77×10^-2μSv。结论研究表明，南水北调东线山东段沿线的放射性核素的平均活度浓度总体上处在本底水平，主要湖区湖水及鲤鱼中的放射性核素所造成的公众辐射危险非常低，湖水在没有受到其他实践所引起放射性污染的情况下可以不考虑其对公众的辐射危险。
Objective To assess the radiation background levels of Shandong basin in east line of northward rerouting of southern river. Methods The activity concentrations of gross-alpha, gross-beta, ^137Cs, ^238U, ^232Th, ^40K, ^226Ra and ^90Sr in the samples were measured by national standard methods respectively. The values of the dose conversion factor given by UNSCEAR 2000 were adopted for dose estimation. Results The average activity concentrations of gross-alpha, gross-beta, ^137Cs, ^238U, ^232Th, ^40K, ^226Ra and ^90Sr in the samples were pooled in order to analyze dose estimation. The committed effective doses of the ^226Ra, ^238U, ^90Sr, ^232Th and ^137Cs from lake water for residents are 1.46, 4.95×10^-1, 1.24×10^-1, 2.58×10^-2 and 7.93×10^-3 μSv per year respectively. The committed effective doses of the ^226Ra, ^238U and ^90Sr from cyprinoid fish are 5.49×10^-2, 3.69×10^-2 and 1.77×10^-2 μSv per year respectively. Conclusions The results show that the average activity concentrations of gross-alpha, gross-beta, ^137Cs, ^238U, ^232Th, ^40K, ^226Ra and ^90Sr in the samples from Shandong basin of northward rerouting of southern river are within the background levels. And in the main lake basin, the estimated exposures of public caused by the radionuclide in water and cyprinoid fish are so low that they can be ignored unless there are some radioactive contamination in the future.
出处
《中华放射医学与防护杂志》
CAS
CSCD
北大核心
2007年第2期188-190,共3页
Chinese Journal of Radiological Medicine and Protection
基金
山东省医药卫生资助项目（2003-15）
关键词
南水北调
山东
放射性
本底
评价
Northward rerouting of southern river
Shandong
Radioactivity
Background levels
Assessment
