摘要
目的分析北京地区蔬菜和原奶样品受日本福岛核事故放射性核素污染的监测结果,评价此次核事故对北京地区食品造成的放射性污染程度。方法启动核应急监测体系,使用高纯锗γ谱仪测量系统对北京地区的蔬菜和原奶样品的放射性污染水平进行监测。结果 2011年4月2日北京通州露天荠菜样品中首次检测出微量人工放射性核素131II,2011年4月2日—6月30日采集的蔬菜样品中131I活度的最大值为海淀野草样品(3.03 Bq/kg),原奶样品中未检测到人工放射性核素。结论监测到的露天蔬菜中131I来自福岛核事故释放,远低于1986年切尔诺贝利核电站事故对北京地区造成的放射性污染程度,其对公众所致有效剂量极其微小,未对该地区居民产生明显的健康影响。
[ Objective] To analyze the results of radioactivity in the vegetables and the original milk following the Fukushima nuclear accident, and evaluate the levels of radioactive contamination in the food in Beijing Region. [ Methods] The system of nuclear emer- gency monitoring was run, then the radioactive contamination level of vegetables and original milk of Beijing were tested by using the HPGe γspectrometer system. [ Results] Trace artificial radioactive isotope of 131I was detected in shepherd＇s purse samples on April 2, 2011 in Tongzhou District of Beijing. The maximum detectable activity isotope of 131I in vegetables （ open field） was about 3.03 Bq/kg during the period from April 2 to June 30, 2011, and no artificial radionuclide was detectable in all the samples of o- riginal milk during the period. [ Conclusion] The minor amounts of 131I in vegetables released from the Fukushima nuclear accident results in very low absorbed dose and induce no visible impact on human health. The maximum detectable activity of 131I in vegeta- bles is much less than that measured in Beijing after the Chernobyl accident in 1986.
出处
《职业与健康》
CAS
2013年第16期1981-1983,共3页
Occupation and Health
关键词
福岛核事故
131I
放射性污染
食品
北京地区
Fukushima nuclear accident
131I
Radioactive contamination
Food
Beijing Region
