Fault Tree Analysis for Emergency Process of Fire Accident in Oil-Gas Storage and Transportation

Abstract

From the perspective of the safety of the emergency process, this paper studies cause factors in the emergency process of fire accident for oil-gas storage and transportation. Nineteen cause factors are summarized based on the statistical analysis of actual accident cases. Based on this, fault tree analysis (FTA) method is used to establish the fault tree of secondary accidents. Forty-four minimal cut sets of this fault tree are calculated, and the possible ways to cause secondary accidents are obtained. Eight minimal path sets are calculated, and the possible approaches against secondary accidents are learned. Moreover, probability importance of each basic event is solved, and their influence degrees on secondary accidents are obtained. Through the qualitative and quantitative analysis of the fault tree, the possible risks in emergency process are found, and some countermeasures are put forward. Finally, FTA method is applied to the analysis of cause factors in the emergency process of two practical accident cases. The results show that the occurrence mechanism of secondary accidents in the emergency process of an oil-gas storage and transportation system and the safety of the whole life cycle are of great scientific and guiding significance.