Reliability Data Collection at Gentilly-2 NGS

As a reliability data collection is planned for every component appearing in fault tree analyses (FTA) in the case of the Gentilly-2 nuclear station, the author describes the organization, principles and processes of data collection. He comments the fact that some collected data are required for reliability calculations and others for reliability improvements (for example, data indicating how the incident occurred). He comments the database structure which must easily allow failure classification, access to data and to functional capabilities. He discusses encountered or expected difficulties, and reports some comments from maintenance workers on reliability data collection with respect to identification of recurrent failures, data precision, jobs executed without a work order, maintenance workers expertise, delays to be avoided. He also discusses components technical specifications database limitations, the fact that information can be stored on more than one database, the access to historical data for a given component, and the importance of environmental conditions of a component