Host: The Japan Society of Mechanical Engineers
Name : The 30th International Conference on Nuclear Engineering (ICONE30)
Date : May 21, 2023 - May 26, 2023
This research is carried out on the basis of the overall technical scheme for the life cycle management of HPR1000 Nuclear Power Plant. Aiming at the most important background evaluation and analysis link, the pipeline system is selected as the research object. Through analyzing the aging mechanism of the power plant pipeline system, it is determined that the thermal stratification phenomenon caused by the intersection of cold and hot fluids at the connection of the pipeline is the main reason for the thermal fatigue accident of the pipeline. According to Miner's linear cumulative damage theory, the method flow of component pipeline fatigue evaluation. Then, on this basis, this study selects the primary circuit T-tube as examples, uses the commercial software ANSYS Workbench to carry out numerical simulation analysis, establishes the model, loads the temperature load on the fluid solid coupling finite element model based on elastic thermodynamics, finite element theory, and fluid solid coupling theory, and considers the fluid flow and heat transfer of the pipe fluid, and the fluid solid coupling factors of the fluid and pipe wall interface heat transfer, The stress state of pipeline under different transient conditions is studied and analyzed, and the fatigue analysis and calculation are carried out to determine the fatigue cumulative use factor of components. The evaluation results have important guiding significance for optimizing the operation of nuclear power plant and improving the life management program system.
