摘要
为研究U-10Mo/Al燃料组件堆内辐照变形对其机械行为和热工水力行为特性的影响,基于辐照-热流固耦合分析方法,通过将非均匀辐照条件引入到燃料组件辐照-热力耦合行为的三维有限元模拟中,开展了U-10Mo/Al燃料组件堆内辐照环境下的机械和热工水力行为研究,计算分析了辐照条件下燃料组件随时间和空间变化的结构力学场和温度场的分布和演化规律。研究结果表明,U-10Mo/Al燃料组件在流场、温度场、机械力学的耦合作用下展现出典型的机械变形行为,支撑板和燃料元件均产生一定程度的弯曲;燃料组件的温度场表现出典型的非均匀空间分布特性,温度峰值出现在燃料元件肿胀量最大的位置;燃料芯体边角区域包壳、芯体的应力整体高于中心区域和支撑板。
In order to investigate the effects of in-pile mechanical deformation under irradiation on the mechanical and thermal-hydraulic characteristics of U-10Mo/Al fuel assemblies,the mechanical behavior and thermal-hydraulic behavior of U-10Mo/AI fuel assemblies under in-pile irradiation are studied by using the thermal-fluid-structure coupling analysis method under irradiation.By introducing non-uniform irradiation conditions into the irradiation-thermalmechanical coupling behavior of the 3D finite element model for fuel assemblies,the distribution and evolution laws of structural mechanics field and temperature field of U-10Mo/Al fuel assemblies under time-dependent and location-dependent irradiation conditions are studied.The results show that under the coupling effect of flow field,temperature field,and mechanical mechanics,U-10Mo/AI fuel assemblies exhibit typical mechanical deformation behavior,and both support plates and fuel elements have a certain degree of bending;the temperature field of fuel assemblies show a typical feature of non-uniform spatial distribution,and the peak temperature occurs at the position of maximum swelling of the fuel element;the stress at the sides and corners of the pellet for cladding and the pellet is larger than that in the central region and support plates.
作者
袁攀
王浩煜
黄山
刘孟龙
岳题
任全耀
秦勉
郑乐乐
郭子萱
Yuan Pan;Wang Haoyu;Huang Shan;Liu Menglong;Yue Ti;Ren Quanyao;Qin Mian;Zheng Lele;Guo Zixuan(Science and Technology on Reactor System Design Technology Laboratory,Nuclear Power Institute of China,Chengdu,610213,China)
出处
《核动力工程》
EI
CSCD
北大核心
2023年第S02期11-16,共6页
Nuclear Power Engineering
基金
核反应堆系统设计技术重点实验室基金(2022-JCJQ-LB-003)。
关键词
燃料组件
辐照效应
热流固耦合
机械变形
热工水力
Fuel assembly
Irradiation effect
Thermal-fluid-structure coupling
Mechanical deformation
Thermal hydraulics
