In the past, the U.S. NRC(Nuclear Regulatory Commission) strictly required testing of the EDG for NPP through Reg.Guide 1.108 Rev 1. However, these test requirements acted as a deterioration and wear factor for diesel engines, and are now applying Reg.Guide 1.9 Rev 3, which relaxed regulatory requirements and improved performance monitoring. After applying the new regulatory guidelines in this study, the EDG analyzed the performance of the combustion chamber. As a result, there were no signs of deterioration or decreased performance of the current EDG. This is due to slow start, short operation time, the use of high quality fuel oil and proper maintenance. On the other hand, if the performance is proven, it is judged that proper period extension of cylinder maintenance is possible.

ABSTRACT
1. 서 론
2. 실험설비 및 연구 방법
    2.1 분석 장비
    2.2 대상설비
    2.3 진단방법
    2.4 엔진 성능 평가
    2.5 사용연료유
3. 성능분석 결과
    3.1 EDG 열성능 관련 운전변수 추이분석
    3.2 엔진 상태진단 결과
4. 결 론
References

• 강승희(한국수력원자력 중앙연구원 기계연구소) | Seung-Hee Kang 교신
• 김명훈(한국수력원자력 중앙연구원 기계연구소) | Myeong-Hun Kim