Journal of Environmental Impact Assessment (환경영향평가)

Korean Society of Environmental Impact Assessment (한국환경영향평가학회)
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Fault Tree Analysis for Risk Assessment of CO2 Leakage from Geologic Storage

지중 저장 이산화탄소의 누출 위험도 평가를 위한 결함수 분석

  • Lee, Sang Il (Department of Civil and Environmental Engineering, Dongguk University) ;
  • Lee, Sang Ki (Department of Civil and Environmental Engineering, Dongguk University) ;
  • Hwang, Jin Hwan (Department of Civil and Environmental Engineering, Dongguk University)
  • 이상일 (동국대학교 사회환경시스템공학과) ;
  • 이상기 (동국대학교 사회환경시스템공학과) ;
  • 황진환 (동국대학교 사회환경시스템공학과)
  • Received : 2009.09.29
  • Accepted : 2009.12.24
  • Published : 2009.12.31
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Abstract

CCS (Carbon Capture and Storage) is considered as the most promising interim solution to deal with the greenhouse gas such as $CO_2$ responsible for global warming. Even though carefully chosen geologic formations are known to contain stored gas for a long time period, there are potential risks of leakage. Up to now, applicable risk assessment procedures for the leakage of $CO_2$ are not available. This study presents a basis for risk analysis applicable to a complex geologic storage system. It starts with the classification of potential leakage pathways. Receptors and the leakage effect on them are identified and quantified. Then, a fault tree is constructed, which yields the minimum cut set (i.e., the most vulnerable leakage pathway) and quantifies the probability of the leakage risk through the cut set. The methodology will provide a tool for risk assessment in a CCS project. The outcomes of the assessment will not only ensure the safety of the CCS system but also offer a reliable and efficient monitoring plan.

Keywords

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