Study on Method for Estimate of Cosmic Radiation Effective Dose Rate at Civil Aviation Altitude in Aerosphere / 航天医学与医学工程

ABSTRACT

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.