抄録
This paper introduces the Risk Based Maintenance method for Nuclear power plants (NPPs) in US. By implementing this method, one US nuclear power plant has achieved huge cost and Man-REM savings. These reductions have been brought by optimization of inspection/maintenance planning. As a result of that optimization, many NPPs have been operating at 18- or 24-months cycles and their utilities can get much income. To achieve these objects in Japan, Hitachi has started to construct knowledge database that is based on manufacturing know-how, engineering and/or design skills, operating data and laboratory data. Furthermore, Hitachi is trying to make a criterion that is based on probability of unplanned shutdown to determine risk significance of nuclear power plants.
