Study On Fault Diagnostic System For 10MW High Temperature Gas-Cooled Reactor

The 10MW High Temperature gas cooled Reactor (HTR-10) is the only modular high temperature gas cooled reactor in operation in the world. Study on the fault diagnostic system of HTR-10 thus is very beneficial for the development of high temperature gas cooled reactor. On a basis of wide survey of literatures, the author proposes a nuclear reactor fault diagnosis method using conservation equations in this thesis. Correspondingly, a HTR-10 fault diagnosis prototype system is developed. The applicability of the method is verified.With an introduction of the concept of general component, the method categorizes the functions of components by the sink and source effect on the fluid in the control volume. Qualitative reasoning is used to analyze the state of source and sink in the control volume by the physical rules derived from conservation equations. Furthermore, it can combine multiple abnormal control volumes to strengthen the reasoning process to determine the control volume containing the source of fault if necessary. According to the relationship between the component fault and function, it analyzes the internal component of the control volume casually, and identifies the potential source of fault. The advantages of this method lie in: 1) It's based on the basic principle of conservations. This enables the method to be generalized and quickly determine the source of fault by multiple control volume inference. 2) The general physical rules with simple applicable condition, concise formulation and reduced number of rules, are helpful to manage and maintain the knowledge base. 3) Component faults are characterized by fault pattern set. Therefore it's easy to define specific fault pattern knowledge for particular component. This increases the flexibility of the method.