| 唐丽,武国亮,徐文萍,樊芳,牟胜.云南某铀矿退役环境保护区周边食品放射性水平分析[J].中华放射医学与防护杂志,2018,38(5):364-367 |
| 云南某铀矿退役环境保护区周边食品放射性水平分析 |
| Radioactivity levels in foods in environmental protection area around a decommissioned uranium mine in Yunnan province |
| 投稿时间：2017-10-10 |
| DOI：10.3760/cma.j.issn.0254-5098.2018.05.008 |
| 中文关键词: 铀矿 退役环境保护区 食品 放射性水平 |
| 英文关键词:Decommissioned uranium mine Commissioned environmental protection area Foods Radioactivity levels |
| 基金项目:苏州市科技发展计划（科技设施）项目（SZS2017021）课题资助 |
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| 中文摘要: |
| 目的 调查云南省某铀矿退役环境保护区周边食品放射性水平，及时发现和预警放射性物质的释放情况，为食品放射性水平监测积累基线数据。方法 监测铀矿退役环境保护区周边3 km范围内20个采样点的粮食、蔬菜和鲜茶叶的放射性水平。样品经现场预处理、实验室制备后，进行放射性核素γ能谱分析。结果 食品中的放射性核素主要包括天然放射性核素238U、232Th、226Ra、40K和人工放射性核素137Cs。238U、232Th、226Ra和40K比活度平均值分别为（0.17±0.05）、（0.25±0.17）、（0.43±0.28）和（103.49±25.10）Bq/kg（鲜重），鲜茶叶中的232Th、226Ra、40K和137Cs放射性水平均高于粮食和蔬菜。结论 铀矿退役环境保护区周边食品的放射性水平均低于国家标准限值。除微量137Cs外，未检出其他人工放射性核素。 |
| 英文摘要: |
| Objective To investigate the radioactivity levels in foods in environmental protection area around a decommissioned uranium mine in Yunnan province, in order to timely discover the release of radioactive substances and to provide accumulated baseline data. Methods Radioactivity levels in grains, vegetables and fresh tea at 20 sampling points were measured in the environmental protection area within 3 km of a decommissioned the uranium mine. After field pretreatment and laboratory preparation, the radionuclides in samples were analyzed by means of γ spectrometry. Results Radionuclides in foods in the area mainly include natural radionuclides (238U, 232Th, 226Ra, 40K) and man-made radionuclide (137Cs). Radioactivity level of 238U, 232Th, 226Ra and 40K was(0.17±0.05),(0.25±0.17),(0.43±0.28)and (103.49±25.10)Bq/kg(fresh weight), respectively. Radioactivity levels of 232Th, 226Ra, 40K and 137Cs in fresh tea were all higher than those in grains and vegetables. Conclusions Radioactivity levels in foods around the area are lower than the relevant national limits. No man-made radionuclide other than 137Cs was found in the area. |
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