Korea Institute of Nuclear Safety, Gwahak-ro 34, Yuseong-gu, 305-338 Daejeon, Republic of Korea.
J Environ Radioact. 2010 Apr;101(4):304-8. doi: 10.1016/j.jenvrad.2010.01.002. Epub 2010 Feb 16.
The overall survey on indoor radon concentration was conducted at all subway stations in a major city, Daejeon in the central part of Korea. It was quarterly performed from September 2007 to August 2008. The annual arithmetic mean of indoor radon concentration of all the stations was 34.1+/-14.7 Bq m(-3), and the range of values was from 9.4 to 98.2 Bq m(-3). The radon concentrations in groundwater (average 31.0+/-0.8 Bq m(-3)) were not significantly high in most stations, but the concentration (177.9+/-2.3 Bq L(-1)) of one station was over the level of 148 Bq L(-1) in drinking water proposed by U.S. EPA. Based on indoor survey results, the approximate average of the annual effective dose by radon inhalation to the employees and passengers were 0.24 mSv y(-1), and 0.02 mSv y(-1), respectively. Although the effective dose based on the UNSCEAR report was potentially estimated, for more accurate assessment, the additional survey on the influence by indoor radon will be necessary.
对韩国中部大田市所有地铁站的室内氡浓度进行了全面调查。这项调查从 2007 年 9 月至 2008 年 8 月每季度进行一次。所有站点的室内氡浓度年平均值为 34.1+/-14.7 Bq m(-3)，数值范围为 9.4 到 98.2 Bq m(-3)。大多数站点的地下水中氡浓度（平均 31.0+/-0.8 Bq m(-3)) 并不高，但一个站点的浓度（177.9+/-2.3 Bq L(-1)) 超过了美国环保署提出的饮用水中 148 Bq L(-1)的水平。基于室内调查结果，员工和乘客因吸入氡而导致的年有效剂量的估计平均值分别为 0.24 mSv y(-1)和 0.02 mSv y(-1)。尽管根据 UNSCEAR 报告进行了潜在的有效剂量估算，但为了进行更准确的评估，还需要对室内氡的影响进行额外的调查。
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