Fault Tree Analysis on Boiler Water Shortage Accidents Based on Safety Ergonomic Theories

摘要

The paper proposes the fault tree analysis method based on safety ergonomic theories in line with the actual conditions of serious consequences such as production interruption and personal injury caused by boiler water shortage accidents due to "human errors". In this method, firstly, the analysis is carried out on the accidents by means of safety ergonomic theories, with the focus on human hidden dangers in the accidents, so as to put forward the "human factors" causing the accidents. Secondly, analogy analysis is carried out on the accidents by means of historic information and data, so as to put forward the "non-human factors" such as equipment failure and design defects in the accidents. Thirdly, deductive reasoning is carried out for relevant factors by means of fault tree analysis method, so as to conduct qualitative analysis on them by constructing fault tree model, thus further confirming the cause logic among the factors and the rank of structure importance. Finally, the paper proposes the key measures for preventing and controlling such accidents, and also puts forward "3E countermeasures". Analysis is carried out on boiler water shortage accidents by this method. The results show that human factors, failing to install alarm and protection device or their failure are the key factors causing boiler water shortage accidents, which provides references and basis for the prevention work for such accidents in future.