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http://dx.doi.org/10.5572/KOSAE.2012.28.4.374

Indoor Radon Levels in the Subway Cabins of the Seoul Metropolitan Area  

Jeon, Jae-Sik (Seoul Metropolitan Government Research Institute of Public Health and Environment)
Seo, Jong-Won (Department of Public Health Hygiene, Shinheung College)
Jeon, Myung-Jin (Seoul Metropolitan Government Research Institute of Public Health and Environment)
Eom, Seok-Won (Seoul Metropolitan Government Research Institute of Public Health and Environment)
Chae, Young-Zoo (Seoul Metropolitan Government Research Institute of Public Health and Environment)
Publication Information
Journal of Korean Society for Atmospheric Environment / v.28, no.4, 2012 , pp. 374-383 More about this Journal
Abstract
In this study, we have observed the airborne radon levels in the subway cabins before and after platform screen doors (PSD) installation. The measurements have been conducted at Seoul metropolitan subway lines in 2008, 2009 and 2010. The mean concentration of the radon inside subway cabins were increased by approximately 53% from $20.1Bq/m^3$ to $30.8Bq/m^3$ by installing PSD. After PSD installation, measured values for the different lines were rather different, and varied between 8.2 and $76.5Bq/m^3$. And mean radon concentrations were in the decreasing order for subway lines 5, 6, 7, 8, 3, 4, 2, 9 and 1. It was also found that the indoor radon concentrations in the subway cabins were highly dependent on the management approach of a ventilation system at the subway stations. By assuming an average of $720\;h\;year^{-1}$ and $2,880\;h\;year^{-1}$ spent in subway cabin, effective doses to passengers and employee were estimated. The expected annual effective dose, in case of an equilibrium factor of 0.4, were $0.07mSv\;y^{-1}$ and $0.26mSv\;y^{-1}$, respectively.
Keywords
Radon; Seoul metropolitan subway; PSD (Platform screen doors); Effective dose;
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Times Cited By KSCI : 5  (Citation Analysis)
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