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联合国原子辐射效应科学委员会(UN-SCEAR)1982年报告指出,天然辐射所致年有效剂量当量约为2mSv,其中40％来自氡(~(222)Rn)及其子体。在地下建筑物内,因空气交换差,~(222)Rn及其子体的浓度较高,人员也将受到较大内照射剂量。沈阳市启用
The 1982 UN-SCAR report states that the annual effective dose equivalent of natural radiation is about 2 mSv, of which 40% comes from radon (222 Rn) and its daughters. In underground buildings, due to poor air exchange, the concentration of ~ (222) Rn and its daughters is high and personnel will also be subject to a larger internal exposure dose. Shenyang enabled