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A Study on the Quantitative Risk Assessment of Hydrogen-CNG Complex Refueling Station

수소-CNG 복합충전소 정량적 위험성평가에 관한 연구

  • 강승규 (한국가스안전공사 가스안전연구원 수소연구실) ;
  • 허윤실 (한국가스안전공사 가스안전연구원 수소연구실)
  • Received : 2020.02.10
  • Accepted : 2020.02.23
  • Published : 2020.02.28

Abstract

This study performed a quantitative risk assessment for hydrogen-CNG complex refueling stations. Individual and societal risks were calculated by deriving accident scenarios that could occur at hydrogen and CNG refueling stations and by considering the frequency of accidents occurring for each scenario. As a result of the risk assessment, societal risk levels were within the acceptable range. However, individual risk has occurred outside the allowable range in some areas. To identify and manage risk components, high risk components were discovered through risk contribution analysis. High risks at the hydrogen-CNG complex refueling station were large leakage from CNG storage containers, compressors, and control panels. The sum of these risks contributed to approximately 88% of the overall risk of the fueling station. Therefore, periodic and intensive safety management should be performed for these high-risk elements.

본 연구는 기존의 CNG충전소에 복합으로 수소충전소를 건설하는 형태의 수소-CNG 복합충전소에 대한 정량적 위험성평가를 수행하였다. 수소충전소와 CNG충전소에서 발생할 수 있는 사고시나리오를 도출하고 각 시나리오에 대한 사고발생빈도를 고려하여 개인적, 사회적 위험도를 계산하였다. 위험성평가 결과 사회적 위험도는 허용가능 범위에 들어 왔으나, 개인적 위험도에 있어서는 일부 지역에서 허용범위를 벗어나는 구간이 발생하였고, 위험성기여도 분석을 통해 고위험요소를 발굴하였다. 수소-CNG 복합충전소에서는 CNG 저장용기, 압축기, 제어 판넬에서 대규모 누출이 발생할 경우 높은 위험도를 보이게 되며 충전소 전체 위험도의 약 88%를 기여하게 된다. 따라서 이러한 고 위험요소에 대하여는 주기적이고 집중적인 안전관리가 이루어져야 한다.

Keywords

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Cited by

  1. 이동식수소스테이션 정량적 위험성평가에 관한 연구 vol.31, pp.6, 2020, https://doi.org/10.7316/khnes.2020.31.6.605