Insights of Predictive Maintenance Implementation in Nuclear Power Plants. KHNP Case Study. Annex V

Most utilities are endeavouring to improve plant performance by preventing equipment failures which could lead to plant shutdown or power loss. Maintenance strategies are changed from corrective maintenance to preventive maintenance to minimize resources and cost of maintenance. To identify the condition of component degradation, several predictive maintenances have been introduced and implemented. Moreover, as on–line condition monitoring technologies are rapidly developed, early warning and prognostic maintenance are introduced to identify any adverse trends in advance. Korea Hydro & Nuclear Power Company (KHNP) has been developing a PM template for all component types used at operating units and is currently optimizing the preventive maintenance of all operating units. Five CM technologies have been implemented as predictive maintenance; some of the cases identified through these will be addressed. KHNP is also developing a centralized on–line monitoring and prognostic analysis system to identify adverse trends with early warning technology which compares relative parameters with that of conditions derived from previous experienced patterns of abnormal conditions. (author)