Development and Application of Hazard Analysis & Risk Assessment Models for the Korea Railway

초록

This study shows the developing process of the Korea railway risk assessment models and the results of their application to the Korea railway. The risk assessment models were developed based on the accident scenarios. Various hazardous events, which have the potential to lead directly to casualties, were defined by gathering various accident reports and having several workshops with railway safety experts. Then, for each hazardous event, the railway accident appearance scenarios and railway accident progress scenarios were developed. The railway accident appearance scenarios provide the base of accident causal analysis models for the frequency evaluation. The railway accident progress scenarios provide the base of accident consequence analysis models for the severity evaluation. The above developed models were applied to assess the accident risk of the Korea railway. The frequency of each hazardous event was evaluated from the historical accident data and structured expert judgments by using the FTA technique. In addition, to assess the severity of each hazardous event, the ETA technique and other safety techniques were applied. Finally, the risks for passengers, staff, and member of public were estimated as the number of equivalent fatalities.