Journal of Soil and Groundwater Environment (한국지하수토양환경학회지:지하수토양환경)

Korean Society of Soil and Groundwater Environment (한국지하수토양환경학회)
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A Preliminary Investigation of Radon Concentrations in Groundwater of South Korea

국내 지하수의 라돈 함량 예비조사

  • Published : 2007.10.31
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Abstract

A survey was performed to evaluate the distribution of radon concentrations in groundwater of South Korea. Groundwaters of 615 wells were sampled for this study during the four years from 1999 to 2002. The results showed radon values ranging from 4 pCi/L to 40,010 pCi/L with a mean and a median of 1,862 pCi/L and 920 pCi/L, respectively. The samples were classified into five groups according to the rock types; granite, sedimentary rocks, metamorphic rocks, Ogcheon metamorphic rocks, and Cheju volcanics. Mean radon concentrations were highest (2,595 pCi/L) in granites and lowest (238 pCi/L) in Cheju volcanic rocks. The groundwaters generally showed the highest radon content (2,298 pCi/L) in the weathered and the fractured bedrock complex and the lowest level (672 pCi/L) in the alluvium. The results showed that the radon concentrations in South Korea are low relative to those reported from other countries. But further investigations are suggested to confirm our results.

국내 지하수의 라돈 함량을 파악하기 위하여 1999년부터 2002년까지 4년에 걸쳐서 615개 지하수 시료에 대한 분석이 이루어졌다. 조사된 농도범위는 4 pCi/L에서 40,010 pCi/L까지로 나타났으며, 평균값과 중간값은 각각 1,862 pCi/L와 920 pCi/L이었다. 조사한 지하수시료를 지질조건에 따라 5개의 집단으로 구분한 결과 평균 라돈함량은 화강암 지역 지하수에서 2,595 pCi/L로 가장 높았으며, 제주화산암 지하수에서는 238 pCi/L로 가장 낮았다. 또한, 풍화대와 암반지하수에서 2,298 pCi/L로 가장 높았으며, 충적층지하수에서는 672 pCi/L로 가장 낮게 나타났다. 국내 지하수중 라돈의 평균 함량과 최고 함량은 유사한 지질환경을 가지는 외국의 경우와 비교하면 낮은 편이나 보다 확실한 결론을 위해서는 추가 분석자료가 필요하다.

Keywords

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