Development of the Monitoring and Diagnosis Technique on Emergency Diesel Generator Engine System

The importance of emergency diesel generator (EDG) has confirmed in the safety evaluation of PSA and the study on aging of EDG has been progressed actively as a part of the project of nuclear plant aging research in the U.S.A.. As the result, the concept of performance evaluation is being transferred from statistical analysis of test results to performance monitoring and trending analysis for monitoring of aging and reliability. Recently, the study related aging characteristic and reliability for EDGS has begun in Korea. And the performance monitoring of diesel engine and procedures related reliability program of EDG introduced in recent is recommended to be complemented. Consequently, the efficient performance monitoring based systematic and integrated monitoring and failure diagnostic technology is necessary. Especially, because the operating hours of EDG for nuclear power plant is brief extremely, ordinary monitoring is liable to be negligent and it is difficult to adopt a high degree expert, too. Therefore, it is important for duty engineer to cope with an emergency state easily as a system displays the results of condition monitoring and failure diagnosis. Putting the goal of this research on a development of monitoring and diagnostic system, diagnosis parameters of EDG is analyzed before anything else. And the prototype monitoring and diagnosis system is developed with this analysis result for a basis