Analysis of Anomaly Event Reports for Extraction of Knowledge on Combined Effects of Multiple Factors on Material Degradation in Nuclear Power Plants(Student Poster Session)

Abstract

A systematic survey of reports on abnormal events experienced in Japanese nuclear power plants has been carried out to identify mechanisms that are responsible to anomalies and failures. The idenfitied mechanisms are then decomposed step-by-step to most basic elementary events called primitives. The decomposition procedure has been supported by our unique model of describing onset and development of a failure event as a consequence of interactions among primitives. The potential advantage of the proposed method has been demonstrated though in-depth analysis of a set of anomaly events experienced in several nuclear plants.