Abstract
An attempt has been made to develop a maintenance management support system for nuclear power plants based on a study of equipment life estimation technique.With the increase in operating experience of nuclear power plants, various kinds of the countermeasures for equipment degradation and more cost effective operations have recently been required. For this purpose, the improvement of maintenance programs are required, to evaluate actual equipment and parts reliability based on field data. So the authors examined the following methods to support maintenance work:(1) Systematic and efficient management method for equipment and parts data, concerning design information and their maintenance information.(2) Equipment life evaluation methods, based on statistical analysis of maintenance history data.(3) Equipment maintenance status evaluation method, using logic rules for decision knowhow that were obtained from experts.As the results of these examinations, a maintenance management support system was developed. This system is able to provide maintenance guidance, such as the results of propriety evaluation for current maintenance cycles, needs for maintenance works etc. The system functions were demonstrated and confirmed using simulated maintenance data.
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