CHARACTERISTICS AND USE OF THE COMPONENT EVENT DATA BANK
The Component Event Data Bank (CEDB) is a centralized bank collecting, at the European level, data describing the operational behaviour of components of Nuclear Power Plants (NPPs) operating in various European countries. It is one of the three event-data banks of the European Reliability Data Systems (ERDS), developed and managed by the JRC-Ispra (the other two banks being the Abnormal Occurrence Reporting System and the Operating Unit Status Report). The CEDB stores information on the operational history (operational times andor number of demands of intervention in a year, failure-event reports) of components of NPPs well identified by their engineering and operation characteristics. As of December 1987, the CEDB contains data from about 5200 mechanical and electromechanical components, pertaining to 21 component-families and 51 engineering systems, monitored for an averaged time of five years in ten LWR Units (and in the steam-water cycle of other reactor type Units or conventional Units) located in seven European countries; the failure-events recorded are about 4200. The CEDB receives data either from national banks, such as the EDF-SRDF and the VATTENFALL-ATV, or directly from the NPPs. The CEDB (as well as the whole of the ERDS) has as main objective the promotion of safety. In particular it has been conceived as a support to the analyst in his safety assessment for the design of a new NPP or the backfitting of an old one. By putting together the operational experience of European NPPs, it was the intention to create a database of raw data, to be conveniently processed, in order to: item - improve the credibility of existing estimated reliability parameters by exploiting the necessary feed- back from plant operation; item - provide a solution to one of the major problems of the reliability analyst; namely the wide spread in reliability parameters existing in the current literature, especially for mechanical and electromechanical components; item - allow comparison between the performance of components of plants of different countries.par This paper briefly describes: item - the main features of the bank classification scheme, its data retrieval capabilities and on-line statistical processing programmes; item - some improvements under study to better meet PSA needs.par Some examples of on-line data treatment are given and commented. The structure of an organized output (a CEDB- Reliability Data Book), which is being implemented, is briefly illustrated. The results of a study on linked multiple failure-events and some analyses based on the application of multivariate analysis techniques are summarized and the interest to continue to investigate along these lines is shown.
Bibliographic Reference: TECHNICAL COMMITTEE MEETING ON EVALUATION OF RELIABILITY DATA SOURCES, WIEN, FEB. 1-5, 1988, AVAILABILITY: CEC-LUXEMBOURG, DG XIII/A2, BP 1907, MENTIONING PAPER ORA 33741 E
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Record Number: 1989126083600 / Last updated on: 1989-05-01
Available languages: en