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http://dx.doi.org/10.5572/KOSAE.2012.28.1.059

A Noticeable Change in Indoor Radon Levels After Platform Screen Doors Installation in Seoul Subway Station  

Jeon, Jae-Sik (Seoul Metropolitan Government Research Institute of Public Health and Environment)
Yoon, Jong-Cheol (Seoul Metropolitan Government Research Institute of Public Health and Environment)
Lee, Ho-Chan (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.1, 2012 , pp. 59-67 More about this Journal
Abstract
Platform screen doors (PSD) installed at 289 stations in Seoul metropolitan subway from November 2005 to December 2009, are expected to prevent death from a fall and improve air quality. In this study, we systematically surveyed changes in radon concentrations before and after PSD installation in Seoul metropolitan subway stations. By solid-state nuclear track detectors (SSNTD), the radon concentrations before and after the PSD installation were measured at 54 stations of 6 lines from 2 to 7 reported to have relatively high radon concentrations. Mean radon concentrations at platforms were decreased by approximately 56% from 121.7 Bq/$m^3$ to 54.0 Bq/$m^3$. Before PSD installation, mean radon concentrations were in the decreasing order for subway lines 7, 5, 6, 3, 4 and 2. On the other hand, after PSD installation the order was changed to 5, 6, 7, 3, 4 and 2. According to a radon map of Seoul metropolitan subway, the number of platforms where radon concentration over was 74 Bq/$m^3$ decreased from 38 to 12 after PSD installation.
Keywords
Subway; Platform screen doors (PSD); Radon concentration; Solid-state nuclear track detectors (SSNTDs); Radon map;
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Times Cited By KSCI : 1  (Citation Analysis)
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