Cosmic radiation exposure of the flight crews in Korea has been managed by Radiation Safety Management around Living Life Act under Nuclear Safety and Security Commission. However, the domestic flight crews are excluded from the Act because of relatively low route dose exposure compared to that of international flight crews. But we found that the accumulated total annual dose of domestic flight crews is far from negligible because of relatively long total flight time and too many flights. In this study, to suggest the necessity of management of domestic flight crews’ radiation exposure, we statistically analyzed domestic flight crew’s accumulative annual dose by using cosmic radiation estimation models of the Civil Aviation Research Institute (CARI)-6M, Nowcast of Atmospheric Ionizing Radiation for Aviation Safety (NAIRAS), and Korean Radiation Exposure Assessment Model (KREAM) and compared with in-situ measurements of Liulin-6K LET spectrometer. As a result, the average exposure dose of domestic flight crews was found to be 0.5–0.8 mSv. We also expect that our result might provide the basis to include the domestic flight crews as radiation workers, not just international flight attendants.

1. INTRODUCTION
2. METHODS
    2.1 Statistics of Domestic Flights
    2.2 Cosmic Radiation Measurements and CalculationPrograms
    2.3. International Regulations on the Radiation Exposureof Flight Crews
3. ANALYSIS
    3.1 Radiation Exposure of Domestic Flight Crews
    3.2 Cosmic Radiation Exposure Dose for Domestic Flights
    3.3 Cosmic Radiation Measurement Experiment usingLiulin-6K
4. RESULTS AND ANALYSIS
5. CONCLUSIONS
ACKNOWLEDGMENTS
REFERENCES

• Hee-Bok Ahn(Department of Air & Space Law, Korea Aerospace University, Goyang 10540, Korea, Air Line Pilots Association of Korea, Seoul 07599, Korea)
• Junga Hwang(Korea Astronomy and Space Science Institute, Daejeon 34055, Korea, Department of Astronomy and Space Science, University of Science and Technology, Daejeon 34113, Korea) Corresponding author
• Jaeyoung Kwak(Korea Astronomy and Space Science Institute, Daejeon 34055, Korea, Department of Astronomy and Space Science, University of Science and Technology, Daejeon 34113, Korea)
• Kyuwang Kim(Air Line Pilots Association of Korea, Seoul 07599, Korea, Department of Flight Operations, Hanseo University, Seosan 31962, Korea)