摘要
[目的]根据国际放射防护委员会(ICRP)和我国国家标准中关于飞行人员宇宙辐射防护的要求,估算某航空公司飞行人员2007年飞行中受到的宇宙辐射受照水平。[方法]根据2007年航空公司各航班的飞行数据,用中国民航总局组织开发的民航飞行宇宙辐射有效剂量计算系统(CARD)计算各航班的年均宇宙辐射有效剂量及年均剂量率,估算飞行人员的辐射受照水平;用美国联邦航空局(FAA)的CARI-6软件计算部分航线飞行人员宇宙辐射受照水平,并对上述两种计算方法的结果进行比较。[结果]2007年460个航班中,单程飞行1次受到宇宙辐射有效剂量最大为17.10μSv,最小为0.36μSv,平均为3.78μSv。全公司飞行员年均受照有效剂量最大为1.81mSv/a,最小为0.72mSv/a,平均为1.45mSv/a;乘务员最大为2.54mSv/a,最小为1.45mSv/a,平均为1.81mSv/a。[结论]飞行人员受到的宇宙辐射有效剂量均在ICRP和我国国家标准建议的限值以下。
[ Objective] In accordance with the international and national standard on radiation safety, estimating the cosmic radiation exposure level received by crews onboard of airlines of a air transportation company in 2007.[ Methods] On the basis of routes data of 2007, the cosmic radiation effective doses received by aircrews in flight on certain routes were calculated with the computer system CARD developed by Civil Aviation Administration of China, and compared the results with those obtained through CARI-6 of FAA.[ Results] For 460 routs in year 2007, the average of cosmic radiation effective dose in flight was 3.78 μSv, with the maximum of 17.10 μSv and minimum of 0.36 μSv. For pilots, the annual average of personal cosmic radiation effective dose received in flight was 1.45 mSv/a, with the maximum 1.81 mSv/a and minimum 0.72 mSv/a. For stewards, the average, maximal, and minimal doses were 1.81 mSv/a, 2.54 mSv/a, and 1.45 mSv/a, respectively.[ Conclusion] The personal cosmic radiation effective dose calculated is below the recommended limit of ICRP and Chinese standard.
出处
《环境与职业医学》
CAS
北大核心
2010年第9期524-527,共4页
Journal of Environmental and Occupational Medicine
基金
国家自然科学基金资助项目(编号:60472119)
