原子炉冷却系の主系統設備に対する荷重解析から応力解析までのシームレスな評価プロセスの検討

抄録

The reactor coolant system (RCS) of a Pressurized Water Reactor consists of Class 1 components such as the reactor pressure vessel, steam generators, etc., and stress evaluations for various load conditions, seismic conditions, etc. are performed for the components. The load and seismic conditions are analyzed using a load analysis model for the RCS that is simulated by beam elements and spring elements. The obtained conditions are applied to analysis models for each part of a component to which stress analyses are performed. This process however requires many steps. In response to this, the authors are developing an evaluation process, called “Seamless Evaluation Process”, to not only optimize the process of transferring interfacing loads, but also to refine the loads and stresses on components by applying an integrated model consisting of the components in the RCS from load analysis to stress analysis. In this paper, the necessity, the status of development and a summary description of the Seamless Evaluation Process are described.