民航飞行人员宇宙辐射受照剂量的估算

Estimated Cosmic Radiation Doses for Flight Personnel.

目的计算被检测飞行人员个人宇宙辐射年均受照有效剂量。方法根据飞行指令数据使用美国联邦航空署开发的软件CARI 6,计算飞行航线的宇宙辐射有效剂量和乌鲁木齐地区地面的宇宙辐射有效剂量率 ,由运行软件输出数据计算个人年均受照有效剂量。结果乌鲁木齐地区地面个人年均受照有效剂量为 0 .42 0mSv ,新疆航空公司全部航线 1 997～ 1 999年平均宇宙辐射有效剂量率为 2 .381 μSv·h- 1 ( 0 .33～ 3.64μSv·h- 1 )。被检测飞行人员年均受照有效剂量为 2 .1 93mSv·a- 1 ( 0 .887～ 4.41 9mSv·a- 1 )。结论估算的 2 34个受检飞行人员的年均受照有效剂量均小于国际放射防护委员会 (ICRP)建议的限值 2 0mSv·a- 1 。

Objective To calculate individual annual cosmic radiation effective dose for monitored flight personnel. Method With the help of aircraft flight information from flight performance manual,software CARI 6 developed by U.S Federal Aviation Administration was used to calculate the effective dose of galactic cosmic radiation along the air lines, and to calculate the effective dose rate on the ground in Urumuqi, then individual annual cosmic radiation dose on flight personnel was estimated from the data calculated by CARI 6. Result The annual cosmic radiation dose on the ground at Urumuqi was 0.420 mSv·a -1 . The average effective dose rate of all flights of Xinjiang Airlines from 1997 to 1999 was 2.381 μSv·h -1 (0.33～3.64 μSv·h -1 ) . Average annual cosmic radiation dose on flight personnel was 2.193 mSv·a -1 (0.887～4.419 mSv·a -1 ). Conclusion Annual individual doses of all monitored flight personnel are well below the limit 20 mSv·a -1 recommended by Intemational Commission on Radiological Protection(ICRP).