A Risk Assessment Approach to Safety Management of Electric Railway Facilities

전기철도 전철전력설비의 위험도 평가 기반 안전관리에 관한 연구

  • 장윤석 (교통안전공단 철도안전본부) ;
  • 최규형 (서울산업대학 철도전기신호공학과)
  • Published : 2009.05.01

Abstract

Power supply system of electric railway has a diversity of safety problems since it should supply high electric power to the trains moving high speed with a lot of passengers on board. This paper provides a risk assessment approach to safety management of the electric railway facilities. Construction of database from field accident information, risk assessment and management of the risk are carried out systematically to ensure the safety. The risk assessment includes hazard identification, cause analysis by FTA(Fault Tree Analysis), consequence analysis by EVA(Event Tree Analysis), and loss analysis. In terms of the severity and the probability of the accidents deduced by these analyses, the risk of the accidents is assessed by using a risk matrix designed for electric railway facilities. Based on the risk assessment, possible risk mitigation options are identified and evaluated by analyzing their impact on the risk reduction and their cost benefit ratio. The long-term safety of the electric railway facilities can be ensured by renewal of the risk assessment and the risk mitigation option analysis with continuous accident database update. The proposed approach is applied to the electric railway facilities of Korean railway based on the accident data from 2002 to 2008.

Keywords

Electric Railway Facilities;Risk Assessment;Safety Management;Risk Matrix

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