Investigation on Screening and Ranking of Life Cycle Management Objects in Nuclear Power Plant

The objects of life cycle management (LCM) are systems or equipment that have an important impact on the safety, availability and economy of power plants. How to identify these objects is the basis of LCM. Based on the study of the traditional life cycle management object screening and ranking method of Electric Power Research Institute (EPRI), and combined with the present situation and demand of equipment management of Chinese nuclear power enterprises, a screening method which takes into account both equipment criticality and economic factors is put forward. Besides, the hierarchical attributes that can reflect the functional importance and the actual operation and maintenance status of the equipment are established, and the weight of each attribute is calculated by the analytic hierarchy process, and then the priority rankings of the LCM objects are determined. The application results in a nuclear power unit show that this quantitative screening and ranking method is in line with industry experience and the actual operation and maintenance status of equipment, and has important application value and practical guiding significance.