Study on the thermo-hydraulic behaviors of the new-pattern fuel assembly in lead-based fast reactors based on OpenFOAM  

作　　者：Yun-Xiang Li Run-Sheng Yang Yue Li Xing-Kang Su Zi-Nan Huang Lu Meng Song Li Bin Xi You-Peng Zhang Lu Zhang Wei Jiang 

机构地区：[1]Institute of Modern Physics,Fudan University,Shanghai 200433,China [2]School of Nuclear Science and Technology,Lanzhou University,Lanzhou 730000,China [3]Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China

出　　处：《Nuclear Science and Techniques》2024年第10期250-263,共14页核技术（英文）

基　　金：supported partly by the Ministry of Science and Technology of the People’s Republic of China(No.2020YFB1902100);the China Postdoctoral Science Foundation(No.2023M731458);the Science and Technology Program of Gansu Province;China(No.23JRRA1099);the Postdoctoral Fellowship Program of CPSF(No.GZB20230278);financially supported by the Shanghai Municipal Commission of Economy and Informatization(No.GYQJ-2018-2-02)。

摘　　要：To improve the heat transfer efficiency of the coolant in lead-based fast reactors,this study optimized the configuration and rotational direction of the spacer wires in fuel assemblies to design a new-pattern fuel assembly.This study conducted detailed comparisons between traditional and new pattern fuel assembly rod bundles utilizing the open-source computational fluid dynamics platform,OpenFOAM.The results indicated that the new design may significantly reduce the pressure drop along the rod bundle,which is beneficial for lowering the pressure drop.Furthermore,this new design improved coolant mixing in the subchannels,which facilitated a more uniform temperature distribution and lower thermal gradients at the assembly outlet.These factors collectively reduced the thermal fatigue and creep in nearby internal components.Overall,the newpattern fuel assembly proposed in this study may have better heat transfer performance,thereby enhancing the Integrated Thermal-Hydraulic Factor by 48.2% compared to the traditional pattern.

关 键 词：Spacer wires Enhanced coolant mixing OPENFOAM CFD simulations 

分 类 号：TL352[核科学技术—核技术及应用]