Overview of Risk Importance Measures and Investigation on Their Applications for Maintenance
Probabilistic Safety Assessment (PSA) has been more and more widely applied in safety-critical industries such as Nuclear Power Plants (NPPs). Among all the objectives from a PSA, a major one is to help focus attention on the most important systems when performing maintenance, namely risk-informed maintenance. This is particularly beneficial when resources are limited in practical applications. To achieve this goal, Risk Importance Measures (RIMs) derived from a PSA can be utilized. There are numerous RIMs defined in the literature. It can be confusing as to which one to use under different circumstances. The purpose of the paper is to provide an overview of existing RIMs. The ones that have been given different names but are essentially equivalent are identified. Afterwards, they are grouped into two major categories: the risk significant measures and the safety significant measures. These two categories of importance measures provide different information with regard to different maintenance practices. Both coherent and non-coherent systems are analyzed. The results show that for both types of systems, the risk significant measures should be used for corrective maintenance, while the safety significant measures should be associated with preventive maintenance.
Birnbaum importance criticality importance factor risk achievement worth risk significance safety significance corrective maintenance preventive maintenance non-coherent system
LU Lixuan
Faculty of Energy Systems and Nuclear Science and Faculty of Engineering and Applied Science,University of Ontario institute of Technology, Ontario L1H 7K4, Oshawa, Canada
国际会议
The 2010 International Symposium on Safety Science and Technology(2010 安全科学与技术国际会议)
杭州
英文
113-120
2010-10-26（万方平台首次上网日期，不代表论文的发表时间）