Reduced-order method for nuclear reactor primary circuit calculation

作     者：Ze-Long Zhao Ya-Hui Wang Zhe-Xian Liu Hong-Hang Chi Yu Ma Ze-Long Zhao;Ya-Hui Wang;Zhe-Xian Liu;Hong-Hang Chi;Yu Ma

作者机构：Sino‑French Institute of Nuclear Engineering and TechnologySun Yat-sen UniversityZhuhai 519082China 

出 版 物：《Nuclear Science and Techniques》 (核技术（英文）)

年 卷 期：2024年第35卷第11期

页      面：28-45页

核心收录：

学科分类：08[工学] 082701[工学-核能科学与工程] 0827[工学-核科学与技术] 

基　　金：supported by the National Natural Science Foundation of China(No.12205389) Guangdong Basic and Applied Basic Research Foundation(No.2022A1515011735) Science and Technology on Reactor System Design Technology Laboratory(No.KFKT-05-FWHT-WU-2023014) 

主　　题：Reactor system model Primary circuit Reduced-order Proper orthogonal decomposition Least-squares method 

摘      要：Accurate real-time simulations of nuclear reactor circuit systems are particularly important for system safety analysis and *** effectively improve computational efficiency without reducing accuracy,this study establishes a thermal-hydraulics reduced-order model(ROM)for nuclear reactor circuit *** full-order circuit system calculation model is first established and verified and then used to calculate the thermal-hydraulic properties of the circuit system under different states as *** proper orthogonal decomposition method is used to extract the basis functions from snapshots,and the ROM is constructed using the least-squares method,effectively reducing the difficulty in constructing the ROM.A comparison between the full-order simulation and ROM prediction results of the AP1000 circuit system shows that the proposed ROM can improve computational efficiency by 1500 times while achieving a maximum relative error of 0.223%.This research develops a new direction and perspective for the digital twin modeling of nuclear reactor system circuits.