大气层中民航飞行空域宇宙辐射有效剂量率估算方法研究  

Study on Method for Estimate of Cosmic Radiation Effective Dose Rate at Civil Aviation Altitude in Aerosphere.

作　　者：冯英进[1] 陈蔚如[2] 

机构地区：[1]中国民航大学交通工程学院,天津300300 [2]中国民航大学航空医学研究所,天津300300

出　　处：《航天医学与医学工程》2009年第2期106-111,共6页Space Medicine & Medical Engineering

基　　金：国家自然科学基金项目(60472119)

摘　　要：目的根据国家标准《电离辐射防护与辐射源安全基本标准》(GB 18871-2002),为了保护民航飞行人员,应该对其飞行过程中受到的宇宙辐射剂量进行监测,为此本文提出一种计算大气层中宇宙辐射剂量率的方法。方法在大量实验和计算数据的基础上,推导出计算从海平面至25 km高度地球大气层中任意位置宇宙辐射剂量率的基本计算公式。宇宙辐射剂量率是海拔、地磁截止刚度和太阳活动日心压的函数。结果用该方法计算了10 km高度不同经度和纬度138个位置的宇宙辐射有效剂量率,并和美国联邦航空署的软件CARI-6的计算结果进行了对比,两组数据的差别在12.56%之内。结论该方法计算精度满足民航飞行宇宙辐射防护监测的要求。Objective To monter radiation doses received in flight and keep aircrew from being radiated, in accordance with ＂The Basic Standard on Ionization Radiation Protection and Radiation Source Safety （GB 18871-2002） of China＂. A method for calculating radiation dose rate is described. Methods On the basis of a great deal empirical and calculated data, a fundamental calculating formula was derived to calculate cosmic radiation dose rate in aerosphere from sea level to altitude of 25 km. The cosmic radiation dose rate was a function of altitude, geomagnetic vertical cut off rigidity and Heliocentric potential. Results One hundred and thirty eight position of cosmic radiation effective dose rates of 10 km altitudes, various latitudes and various longitudes were calculated with this method, as well as compared to those calculated with CARI-6 software of Aviation Commission of USA. Their differences were within 12.56% . Conclusion It is showed that this method is sufficient to ensure a precision on the dose estimation for radiation protection of aviation flight.

关 键 词：宇宙辐射 有效剂量率 剂量估算 飞行人 

分 类 号：R852.7[医药卫生—航空、航天与航海医学]