An expert system for automated hazard analysis based on multimodel approach

Abstract In this article, a new methodology for automated hazard analysis of chemical plants is presented. The proposed system is composed of three knowledge bases — unit knowledge base, organizational knowledge base and material knowledge base, and three hazard analysis algorithms — deviation, malfunction and accident analysis algorithm. The proposed algorithm can perform hazard analysis in two methods and represent all conceivable types of accidents using accident analysis algorithm. In addition, it provides intermediate steps in the accident propagation, and enables the analysis result to give a useful information to hazard assessment. The proposed method is successfully demonstrated by being applied to diammonium phosphate manufacturing process.