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KMID : 1024519970060050489
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Journal of the Environmental Sciences
1997 Volume.6 No. 5 p.489 ~ p.496
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A Study on Harmful Radioactive Gas(Rn₂22)-Concentration in Soils, Taejeon City
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Kim Seung-Oh
Kim Hai-Gyoung
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Abstract
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The arm of this study is to determine harmful radioactive gas()-concentrations in soils and to suggest the anormalous regions of -concentration in Taejeon area. The range of -concentration in the soils (45 samples) of the survey area is 100 to 2, 475 (pCi/L) and mean of those values is 489 505 (pCi/L). The 2% (4 samples) of soil-gas samples (45 ones) collected In the survey area is corresponded to high rusk level, 53% (24 samples) to medium one and 43% (19 samples) to low one. Especially. The -concentration is relatively higher in schistose granite region than in other rock Mts (two-mica granite and biotite ganite) in the survey area. The -concentration is propotional to the uranium contents in the soils. The soil hardness among the various factors is correlative with -concentrations. To prevent the damage from -concentrations, It is necessary to close the cracks of underground structure and to consider methods reducing -concentration for the anormalous regions.
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KEYWORD
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Rn222-concentration, pCi/L, risk level
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