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本文通过对福建省境内的鹰厦线、外福线等6条铁路干、支线上的19座500m以上的铁路运营隧道和隧道外铁路线的γ辐射水平的调查,结果表明,隧道内γ射线空气吸收剂量率(15.23～37.83×10~(-8)Gy·h~(-1))高于隧道外铁路线(10.45～23.92×10~(-8)Gy.h~(-1))但均未超过我国和福建省(包括防空洞)的天然环境γ辐射水平;隧道内、外的γ辐射水平与其所分布地区的γ射线天然本底的高低有关。
This paper investigates the γ radiation levels of 19 railway lines above 500 m in railway trunk lines and tunnels of 6 railways in Fujian Province, such as Yingxia Line and Waifu Line. The results show that γ ray in tunnel The air dose rate (15.23 ~ 37.83 × 10 ~ (-8) Gy · h ~ (-1)) was higher than that of the tunnel (10.45 ~ 23.92 × 10 ~ 8) Gy.h -1 But none of them exceeded the γ radiation level of natural environment in our country and Fujian Province (including air-raid shelters). The level of γ-radiation inside and outside the tunnel is related to the natural background of γ-rays in the areas where they are distributed.