Abstract
This paper used human factors analysis and classification system (HFACS) and Bow-tie model to analyze a sulfuric acid tank leakage accident occurred in Hongshen Trading Co., Ltd. to identify the human factors hidden behind the accident. Firstly, the HFACS model is used to analyze the accident, and four levels of accident factors under the model were obtained. Then, taking the unsafe act of “illegal welding operations on storage tanks” as an example, the bow-tie model was used to analyze its consequences in this accident. According to the causes and consequences of unsafe act, the bow-tie model is used to establish preventive measures and control measures respectively to control the human factors of accident. Finally, a complete Bow-tie diagram of “illegal welding operations on storage tanks” was obtained. The accident analysis method using HFACS and Bow-tie model can fully identify the human factors in this leakage accident and provide reference for accident investigation.
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