基于蒙特卡罗方法的航空机组人员辐射剂量评估北大核心CSCD

采用辐射仿真人体面元模型和数字化飞机模型,基于蒙特卡罗方法开展了航空机组人员的航空辐射剂量研究。选取昆明至北京航线为例,评估了航空机组人员在该航线飞行时受到的航空辐射有效剂量率,分析了人体参数对航空辐射有效剂量率的影响,并探索了航线参数变化时机组人员受到的航空辐射有效剂量率的变化。结果表明,机组人员在昆明至北京航线受到的航空辐射有效剂量率为2.114μSv/h,基于中国人参考生理特征的体模和高加索人体参数体模的有效剂量率评估结果差异为25.3%;航线参数中航线的高度是最主要的影响因素,14 km飞行高度的航空辐射有效剂量率达到10 km高度时的1.8倍,同时,航线纬度升高时,机组人员受到的航空辐射有效剂量率也会产生显著的提升。该研究对航空机组人员的辐射剂量评估具有一定的参考和指导意义。

Aircrew radiation dose assessment based on Monte Carlo simulation

Based on the Monte Carlo method, the radiation dose of aviation crew was studied by using mesh polygon based radiation computational phantom and digital aircraft model. The air route from Kunming to Beijing was selected as an example, the effective dose rate of aviation radiation received by air crew during flight on this route was calculated, the influence of human parameters on the effective dose rate was analyzed, and the variation of effective dose rate received by air crew when the flight route parameters were changed was explored. The results show that the effective dose rate of the crew on the route from Kunming to Beijing is 2.114 μSv/h, the difference of effective dose rate between radiation computational phantom based on Chinese reference physiological characteristics and Caucasian parameter body model is 25.3%. Among the route parameters, the altitude of the route is the most important influencing factor, the effective dose rate of aviation radiation at a flight altitude of 14 km is 1.8 times that at a flight altitude of 10 km. When the latitude of the airline increases, the effective dose rate of aviation radiation received by the aircrew will also significantly increase. This work will provide a certain degree of reference and guidance for radiation dose assessment of aviation crew.