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目的通过调查淄博市生活饮用水中总α、总β、铯-137、锶-90等活度浓度,研究当地居民生活饮用水的放射性水平、人工核素活度浓度水平以及用于剂量估算的主要放射性核素。方法依据《生活饮用水标准检验方法:放射性指标》(GB/T 5750.13-2006)、《水中放射性核素的γ能谱分析方法》(GB/T 16140-1995)和《水中锶-90放射化学分析方法二—(2-乙基己基)磷酸酯萃取色层法》(GB 6766-86),使用低本底总α、总β测量设备及HPGeγ能谱仪进行样品总α、总β与锶-90、碘-131等等核素的分析测量。结果淄博市张店区生活饮用水中总α活度浓度范围为59~168 m Bq/L,总β活度浓度范围为67~255 m Bq/L,~(90)Sr活度浓度范围为3.5~4.5 m Bq/L,~(226)Ra活度浓度范围为6.0~10.2 m Bq/L,~(232)Th活度浓度范围为4.3~7.2 m Bq/L,40K活度浓度范围为65~154 m Bq/L,238U活度浓度范围为51~92 m Bq/L。结论淄博市生活饮用水放射性物质含量处在正常本底水平,可以正常饮用。
Objective To investigate the radioactive levels, the activity levels of artificial radionuclides, and the dose estimation in the drinking water of Zibo City by investigating the activity concentrations of total α, total β, cesium-137 and strontium-90 in drinking water of Zibo City The main radionuclide. Methods According to Standard Test Method for Domestic Drinking Water: Radioactive Index (GB / T 5750.13-2006), Gamma Spectrum Analysis Method of Radionuclides in Water (GB / T 16140-1995) and Strontium-90 Radiochemical Analytical method bis (2-ethylhexyl) phosphate extraction chromatography "(GB 6766-86), the use of low background total α, total β measuring equipment and HPGe γ spectrometer sample total α, total β and strontium -90, iodine -131 and so on the analysis and measurement of nuclides. Results The total α activity in drinking water ranged from 59 to 168 m Bq / L in Zhangdian District of Zibo City. The total β activity ranged from 67 to 255 m Bq / L, and the activity of ~ (90) Sr ranged from 3.5 ~ 4.5 m Bq / L, ~ (226) Ra activity concentration range 6.0 ~ 10.2 m Bq / L, ~ (232) Th activity concentration range 4.3 ~ 7.2 mBq / L, 40K activity concentration range 65 ~ 154 m Bq / L, 238U activity concentration in the range of 51 ~ 92 m Bq / L. Conclusion The content of radioactive substance in drinking water in Zibo City is at the normal background level and can be consumed normally.