原子力発電所を構成する機器の簡易的な経済保全重要度 評価方法に関する研究
Study of a Simplified Method of Evaluating the Economic Maintenance Importance of Components in Nuclear Power Plant System
著者:
青木 孝行 Takayuki AOKI 児玉 典子 Noriko KODAMA 高木 敏行 Toshiyuki TAKAGI
発刊日:
公開日:
Economic EfficiencyFussell-VeselyMaintenance ImportancePRAProduction CostRAWRepair CostRestoration TimeRisk ImportanceSafety
概要
Safety risk importance of components in nuclear power plants has been evaluated based on the probabilistic risk assessment and used for the decisions in various plant managements. But economic risk importance of the components has not been discussed very much. Therefore, this paper discusses risk importance of the components from the viewpoint of plant economic efficiency and proposes a simplified evaluation method of the economic risk importance (or economic maintenance importance). As a result of consideration, the followings were obtained. (1) A unit cost of power generation is selected as a performance indicator and can be related to a failure rate of components in nuclear power plant which is a result of maintenance. (2) The economic maintenance importance has two major factors, i.e. repair cost at component failure and production loss associated with plant outage due to component failure. (3) The developed method enables easy understanding of economic impacts of plant shutdown or power reduction due to component failures on the plane which adopts the repair cost in vertical axis and the production loss in horizontal axis.
