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.
DownLoad: