张宇扬,陆道纲,王孝天,曹琼,李臻

• 1:非能动核能安全技术北京市重点实验室
• 2:华北电力大学核科学与工程学院

摘要(Abstract)：

铅铋合金（LBE）作为冷却剂的快堆是第四代核能系统的主要堆型之一。燃料组件的定位格架是燃料棒束的定位结构，同时对燃料组件的热工水力性能也有重要的影响。本研究首先对板翼型格架组件的热工水力特性进行数值模拟，并通过与实验对比，验证了模拟方法的有效性；其次对板翼型、双翼型、单板型三种定位格架组件的热工水力特性进行了数值模拟。结果表明：流经不同格架造成LBE的最高温度位置不同，双翼型、单板型格架组件LBE温度分布更为均匀；格架的翼和板（翼）的中间区域会使对LBE温度均匀起到一定作用的横向速度叠加抵消，单板型格架无此情况；对于格架造成的局部压降，单板型格架阻力系数最小。综合考虑，单板型格架组件的热工水力性能最佳。

关键词(KeyWords)： 铅铋合金(LBE);定位格架;冷却剂通道;热工水力

Abstract:

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基金项目(Foundation):

作者(Author): 张宇扬,陆道纲,王孝天,曹琼,李臻

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