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Research Article

Characteristics of Radon Reduction of Small-scale Water Supply System

소규모수도시설 지하수의 라돈저감 특성

Byong-Wook Cho1*
조 병욱1*
1Groundwater and Ecohydrology Research Center, Korea Institute of Geoscience and Mineral Resources, Principal Researcher
1한국지질자원연구원 지하수연구센터, 책임연구원
*Corresponding Author
31 March 2019. pp. 37-50
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Abstract

It is possible that radon removal in groundwater of small-scale water supply system (SWSS) is caused by atmospheric storage and aeration facilities installed in the water tank. Radon removal rates at water tank and tap of the 32 SWSS during summer season ranged from -69.3% to 62.7% (average 25.7%) and from -64.3% to 83.1% (average 30.3%) while those of 16 SWSS during autumn season ranged from 21.3% to 78.0% (average 42.8%) and from 17.7% to 66.9% (average 44.8%). The reason of higher radon removal rate in the autumn season compared with the summer season is due to higher atmospheric storage effect by lower groundwater use rate. The radon removal rates at the water tank from 12 SWSS were 47.4∼94.0% (average 78.9%), in which the removal rates at the atmospheric storage are also included. Atmospheric storage and aeration can be used to reduce radon concentration in SWSS groundwater. For more efficient use of radon reduction, further studies are necessary to assess the radon removal rate considering variation conditions of radon concentration in groundwater, size and forms of water tank, change in groundwater usage rate, aeration capacity and ventilation facilities.

Keywords
Small-scale water supply system
radon concentration
removal rate
atmospheric storage
aeration

지하수를 원수로 이용하는 소규모수도시설의 라돈 저감은 주로 저수조에서의 정치와 폭기에 의해 일어난다. 여름철 정치에 의한 32개 소규모수도시설 저수조와 꼭지수의 라돈 저감율은 -69.3∼62.7%(평균 25.7%)와 -64.3%∼83.1%(평균 30.3%), 가을철 정치에 의한 16개 소규모수도시설 저수조와 꼭지수의 라돈 저감율은 21.3%∼78.0%(평균 42.8%)와 17.7%∼66.9%(평균 44.8%)로 나타났다. 여름철보다 가을철의 라돈 저감률이 더 높은 것은 가을철의 지하수 사용량이 더 적어서 정치효과가 더 컸기 때문으로 판단된다. 폭기시설이 설치된 12개 저수조의 라돈 저감률은 47.4∼94.0%(평균 78.9%)로 나타났는데 이 저감률에는 정치에 의한 라돈 저감률이 합쳐져 있다. 소규모수도시설 지하수의 라돈 저감을 위해서는 정치와 폭기를 이용할 수 있는데 보다 효율적인 활용을 위하여 지하수의 라돈 함량 변동성, 저수조의 크기와 형태, 지하수 사용량 변화, 폭기량, 환기시설 등을 고려한 라돈 저감 연구가 필요하다.

키워드
소규모수도시설
라돈함량
저감효율
정치
폭기
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Information
  • Publisher :Korean Society of Engineering Geology
  • Publisher(Ko) :대한지질공학회
  • Journal Title :The Journal of Engineering Geology
  • Journal Title(Ko) :지질공학
  • Volume : 29
  • No :1
  • Pages :37-50
  • Received Date : 2019-02-16
  • Revised Date : 2019-03-22
  • Accepted Date : 2019-03-26
  • DOI :https://doi.org/10.9720/kseg.2019.1.037
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