摘要
就福岛核事故发生后北京市所做的辐射应急监测工作(3月12日至5月22日)做了回顾,分析了核事故放射性核素释放的特点及照射途径,介绍了γ辐射剂量率连续自动监测、气溶胶、土壤等监测内容及方法,对监测数据和福岛核电站核泄漏对环境的影响做了分析、评估,监测结果表明,γ辐射连续监测剂量率在北京市本底辐射水平范围之内,未见异常;产生放射性污染的核素为131I、137Cs和134Cs,在考虑空气浸没外照射和空气吸入内照射2种照射途径相加且同时存在3种核素时,对幼儿、少年和成人的有效剂量均低于天然本底年辐射剂量的万分之一,无需采取防护措施。
The article presents a retrospect aiming at Beijing radiation emergency monitoring work （from 12 March to 22 May） after the Fukushima nuclear accident, analyses the character about this nuclear accident radionuelide discharge, introduces the monitoring objects and methods such as γ dose rate＇ s continuous automatic monitoring, aerosol monitoring and soil monitoring and so on. The monitoring data is analyzed and the influence of the leakage is evaluated. The monitoring results indicate that the range of γ continuous dose rate is in the range of Beijing background radiation level, the radionuclides are ^131I、^137 Cs and ^134 Cs. Based on the aerosol data, considering the external exposure from airborne radionuclide and internal exposure from inhalation, assuming the three radionuclides exist at the same time, the effective dose to infants, youths and adults are all lower than one of a million of effective natural background dose
出处
《核电子学与探测技术》
CAS
CSCD
北大核心
2013年第2期194-197,共4页
Nuclear Electronics & Detection Technology
关键词
核事故
辐射
应急监测
照射途径
有效剂量
nuclear accident
radiation
emergency monitoring
exposure pathways
effective dose
