摘要
以CPR1000核电机组使用的格架组装的5×5棒束燃料组件为对象,开展了多组全长棒束燃料组件搅混特性实验,重点分析了冷-热棒布置形式、格架布置形式等几何参数对燃料组件搅混特性的影响规律,实验结果表明,冷-热棒中心对称布置时的燃料组件热扩散系数更接近真值;跨间搅混格架对燃料组件总体热扩散系数有较小增强作用,但对于棒束压降的贡献很低。
Taking the 5×5 bundle fuel assembly assembled with the spacer grid used in CPR1000 nuclear power unit as the object,experiments on the mixing characteristics of several groups of full-length bundle fuel assembly were carried out.The effects of geometric parameters such as cold-hot rod arrangement and spacer grid arrangement on the mixing characteristics of fuel assembly are analyzed emphatically.The experimental results show that the thermal diffusion coefficient of the fuel assembly is closer to the true value when the cold-hot rods are symmetrically arranged in the center;The inter-span mixing spacer grid has a small enhancement effect on the overall thermal diffusion coefficient of fuel assembly,but its contribution to the pressure drop of bundle is very low.
作者
程诚
叶停朴
卢冬华
苏前华
龙彪
陈振辉
Cheng Cheng;Ye Tingpu;Lu Donghua;Su Qianhua;Long Biao;Chen Zhenhui(Nuclear Power Technology Research Institute of China,Shenzhen,Guangdong,518000,China;School of Energy and Environment,Southeast University,Nanjing,210096,China)
出处
《核动力工程》
EI
CAS
CSCD
北大核心
2022年第2期22-27,共6页
Nuclear Power Engineering
关键词
燃料组件
5×5棒束
热扩散系数
几何参数
Fuel assembly
5×5 bundle
Thermal diffusion coefficient
Geometrical parameters
