飞行人员宇宙辐射估算与实验测量的比较研究

Comparison of Measured and Estimated Cosmic Radiation Doses for Air Crew

目的为了保护民航飞行人员的身体健康,对其在飞行过程中受到的宇宙辐射剂量进行监测,并对估算系统和实际剂量计测定值准确性进行对比研究。方法选定11个往返航班的飞行员佩戴个人剂量计并检测辐射受照水平,同时采用美国民航局开发的宇宙辐射剂量估算系统CARI-6软件计算相同航线飞行员宇宙辐射受照水平,并对上述两种方法结果进行比较。结果 7条国际航线计算机模拟与实测数据准确度比值为1.06±0.32,2条国内航线计算机模拟与实测数据准确度比值为0.82±0.08,国际往返航班所受最大辐射剂量率为4.12μSv/h,国内往返航班所受最大辐射剂量率为2.26μSv/h。结论两种方法有较好的符合度。飞行员受到的千小时宇宙辐射有效剂量在ICRP和我国国家标准建议的限值以下,但对可能受到较高宇宙辐射的飞行员仍应采取预防措施。

Objective To ensure the health of the pilots,the cosmic radiation doses during flights were monitored. Methods 11 flight routes were investigated to determine the total effective dose based on the real measurement and the calculation of CARI-6 software. Then the consistency of the two methods was analyzed. Results For 7 international flight routes,the ratio of CARI-6 / measured value was 1. 06 ± 0. 32. For 2 domestic flight routes,the ratio was 0. 82 ± 0. 08. The maximum of personal cosmic radiation effective dose was 4. 12μSv /h in international routes and was 2. 26 μSv /h in domestic routes. Conclusion The result demonstrates a good agreement between both methods. The doses received by aircrew will be well below the occupational limit and the proposed annual ICRP limit,but the aircrew should still take preventive measures if they will be exposed to higher cosmic radiation.