Effectiveness evaluation of the internal OE process change in KHNP

Operating Experience (OE) is effective and valuable source of information for improving the safety and reliability of nuclear power plants. It is essential to collect OE information in a systematic way based on the IAEA, WANO and INPO guidelines. KHNP, operating organization in Korea also adopts and is operating OE program and feedback process which are based on WANO recommendation to meet IAEA safety standards. KHNP has adopted significance criteria to strengthen screening process of internal OE program from April, 2017. In this paper we review the changes of OE trends before and after adopting significance criteria in internal OE process. This numerical value has important meaning that more important OE reports are selectively dismissed to the plants, so site staffs can focus on more important OE information. In long-term point of view, this could reduce the work load of the workers in plants as well as the improvement of effectiveness of internal OE process. We expect that practical application rate of internal OE reports will increase slightly.