A Study on Hazard Analysis and Risk Assessment of Railway Signal System Using FTA/ETA Method

FTA/ETA 기법을 이용한 철도신호시스템의 위험 분석 및 위험성 평가에 관한 연구

In this paper, it was proposed that hazard analysis and risk assessment about railway signal systems using FTA(Fault Tree Analysis) and ETA(Event Tree Analysis) one of the reliability analysis methods executed and output value based on the hazard baseline of CENELEC and EC 61508 producted, and also the SIL(Safety Integrity Level)/THR(Tolerable Hazard Rate) about the system set. On the basis of this principle, more systematic standardizations are required to operate railway system and in the future, we hope that safety and reliability of signal equipment will be better improved.