A Study of Knowledge Management on Enhancing the Effectiveness of Plant Life Management for Nuclear Power Plants

In the long-term energy supply and demand outlook, the energy mix has become a global trend, and nuclear power plants （ NPPs ） are required to maintain a certain power ratio over a long period in Japan. Under such circumstances and with the energy mix, the long-term operation （ LTO ） of existing NPPs is attracting attention. LTO requires proper management during the operation period of the NPP, including decommissioning; this is plant life management （ PLM ） . In this study, we will take up PLM, which is an activity performed to realize LTO, give an overview of the current situation in Japan, and present performance indicators to measure its effectiveness. As a result, it becomes clear that a continuous improvement can be observed by adding a time axis to the form of knowledge that has been considered thus far. Furthermore, regarding the reduction in the number of accidental fail-ures, which is the remaining issue related to physical deterioration, technical and organizational as-pects will be discussed as countermeasures, and solutions will be presented along with a systematic diagram of knowledge management.