Journal of Korean Society of Environmental Engineers (대한환경공학회지)

Korean Society of Environmental Engineers (대한환경공학회)
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Numerical Study on Indoor Dispersion of Radon Emitted from Building Materials

건축자재로부터 방출되는 라돈의 실내 확산에 대한 수치해석적 연구

  • Park, Hoon Chae (Department of Environmental Engineering, Yonsei University) ;
  • Choi, Hang Seok (Department of Environmental Engineering, Yonsei University) ;
  • Cho, Seung Yeon (Department of Environmental Engineering, Yonsei University) ;
  • Kim, Seon Hong (Department of Environmental Engineering, Yonsei University)
  • Received : 2014.01.14
  • Accepted : 2014.05.01
  • Published : 2014.05.31
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Abstract

Growing concerns about harmful influence of radon on human body, many efforts are being made to decrease indoor radon concentration in advanced countries. To develop an indoor radon reduction technology, it is necessary to develop a technology to predict and evaluate indoor inflow and emission of radon. In line with that, the present study performed computational modelling of indoor dispersion of radon emitted from building materials. The computational model was validated by comparing computational results with analytical results. This study employed CFD (Computational Fluid Dynamics) analysis to evaluate the radon concentration and the airflow characteristics. Air change rate and ventilation condition were changed and several building materials having different radon emission characteristics were considered. From the results, the indoor radon concentration was high at flow recirculation zones and inversely proportional to the air change rate. For the different building materials, the indoor radon concentration was found to be highest in cement bricks, followed by eco-carats and plaster boards in the order. The findings from this study will be used as a method for selecting building materials and predicting and evaluating the amount of indoor radon in order to reduce indoor radon.

전 세계적으로 라돈에 대한 관심이 증대되면서 실내 라돈 농도를 저감하기 위한 노력이 여러 분야에서 진행 중이다. 실내 라돈의 저감 기술 개발을 위해서는 라돈의 실내 유입 및 방출 차단에 대한 예측 및 평가방법에 대한 기술 개발이 필요하다. 따라서 본 연구에서는 건축자재에서 방출되는 라돈의 실내 확산을 전산모델링 하여 해석적 방법과 비교하였으며, CFD 해석을 통하여 환기조건, 환기량, 건축자재 변화에 따른 건물 내 기류 특성과 라돈 농도를 평가하였다. 실내 라돈 농도는 실내 기류의 재순환 영역이 형성되는 곳에서 높게 분포하였으며, 환기량이 증가할수록 감소하였다. 건축자재별 실내 라돈 농도는 시멘트 벽돌이 가장 높았으며, 그 다음 에코카라트, 석고보드 순으로 나타났다. 본 연구의 결과는 실내 라돈 저감을 위한 건축재료의 선정과 실내 라돈 예측 및 평가 방법으로 적용이 가능할 것으로 판단된다.

Keywords

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