Abstract: 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.

Key words: aviation radiation, Monte Carlo method, radiation computational phantom, radiation protection