饮用水中α、β放射性不确定度测评的探讨

Discussion of the Evaluation of Alpha and Beta Radioactive Uncertainty in Drinking Water

为了选择科学准确、合理有效的测评总α、β放射性不确定度的方案,作者根据国家标准《生活饮用水标准检验方法放射性指标》(GB/T 5750.13-2006)检测饮用水中的总α、β放射性,并采用(GB/T 5750.13-2006)及(JJF 1059.1-2012)的方案对总α、β放射性不确定度分别进行测评分析。GB/T 5750方案的测评数据为C’(α)=(0.112±0.022)Bq/L,C’(β)=(0.122±0.018)Bq/L,JJF 1059方案的测评数据为C’’(α)=(0.112±0.024)Bq/L,C’’(β)=(0.122±0.020)Bq/L,两个方案的测评数据相近。由此表明,当检测过程足够严谨,可选用GB/T 5750的方案对饮用水进行放射性活度不确定度测评,从而提高检测效率。

In order to select the scientific, accurate, reasonable and efficient total alpha and total beta radioactivity uncertainty evaluation program, the attthor detected total alpha and total beta radioactivity in drinking water according to the national standard- Standard Examination Methods for Drinking Water-Radiological Parameters （GB/T 5750.13-2006）, and measured the total alpha and total beta radioactivity unceatainty respectively using the （GB/T 5750.13-2006）and （JJF 1059.1-2012） programs. The evaluation data of GB/T 5750 program is C＇（α）=（0.112±0.022） Bq/L, C＇（β）=（0.122±0.018） Bq/L. The evaluation data of JJF 1059 progoam is C＂（α） （0.112±0.024） Bq/L, C＂（β）-（0.122±0.020） Bq/L. The evaluation data of the two schemes are similar. Therefore, when the detection process is rigorous enough, the scheme of GB/T 5750 can be used to evaluate the radioactivity uncertainty of drinking water, which could improve the detection efficiency.