Development of a refined helical fuel mixing model and application to a helical fuel rod bundle

作     者：FU JunSen XIAO Yao LI JunLong ZHANG Qi CONG TengLong GU HanYang 

作者机构：School of Mechanical EngineeringShanghai Jiao Tong UniversityShanghai 200240China 

出 版 物：《Science China(Technological Sciences)》 (中国科学（技术科学英文版）)

年 卷 期：2023年第66卷第2期

页      面：586-598页

核心收录：

学科分类：0808[工学-电气工程] 08[工学] 

基　　金：supported by the National Natural Science Foundation of China (Grant Nos.12135008,12075150,and 12275174) the Shanghai Rising-Star Program (Grant No.22QA1404500) the Jingying Project of China National Nuclear Corporation 

主　　题：helical fuel crossflow flow sweeping mixing model refined subchannel method 

摘      要：Fuel assemblies have a decisive impact on the performance and safety of nuclear *** fuel has huge potential for application in small module reactors(SMRs)due to its advantages in volume power density and *** helical fuel elements are usually trilobal or cruciform in *** fuel rods are helically twisted in the axial direction,eliminating the need for spacer grids as the fuel rods are *** this paper,a refined subchannel division approach is proposed based on the crossflow mechanism of helical fuel ***,a refined helical fuel mixing model framework,including the helical fuel distributed resistance method and directed crossflow method,is developed and implemented in a helical fuel rod bundle to investigate the mixing *** is provided by a 5×5 helical fuel bundle mixing *** refined model predicts about 92.7%of the data with the±10%error *** with existing helical fuel mixing models,the refined mixing model has higher axial accuracy and radial spatial resolution,and can accurately predict the twist angledependent crossflow rate and entry ***,the refined helical fuel mixing model framework is universal and can be effectively used for the mixing prediction of arbitrary geometric helical fuel after the calibration of coefficients.