An Outline Survey of Indoor and Outdoor ^<222>Rn Concentrations in South Korea

概要

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An outline survey of indoor and outdoor 222Rn concentrations in South Korea was carried out with electrostatic integrating 222Rn monitors (EIRM) from Sept. 1995 to Feb. 1997. The annual mean indoor and outdoor 222Rn concentrations at the six central cities across Korea were 26.1Bq·m-3 and 9.0Bq·m-3, respectively. The outdoor 222Rn concentrations in seashore areas were lower than those of inland areas. Relatively high outdoor 222Rn concentrations were found at the inland cities in Korea, which may be explained as the geological structure. The ratios of indoor to outdoor 222Rn concentrations ranged from 1.6 to 3.8 with an average of 2.9. The seasonal pattern seems to be relatively high during spring to summer and relatively low during autumn to winter for both indoor and outdoor 222Rn concentrations. Passive integrating 222Rn cup monitors were also used to measure the indoor 222Rn concentrations at Seoul. The results showed that the concentrations in basements were clearly higher than those in usual living/working places, and the averages were 43.8Bq·m-3 and 24.2Bq·m-3, respectively.
日本保健物理学会の論文
1998-12-01