球床堆锥底与卸料管对物理特性的影响  

Effect of cone-bottom and discharge tube in pebble bed reactor on physical performance

作　　者：经荣清 钟文发[1] 罗经宇[1] 

机构地区：[1]清华大学核能技术设计研究院

出　　处：《清华大学学报（自然科学版）》1994年第6期26-32,共7页Journal of Tsinghua University(Science and Technology)

基　　金：国家"八六三"高科技项目

摘　　要：描述了具有锥形底和卸料管的球床式高温气冷堆的物理模型，网格划分及燃料球多次通过的模拟计算。通过模型的实例计算，分析了锥底和卸料管对物理参数的影响。对比有、无卸料管和雄底模型的计算结果表明，有效增殖因子、平均燃耗、最大功率密度及堆芯各流道的卸料球燃耗的差别较小。但是，在卸料管和锥底的局部功率分布、中子通量分布和温度分布仅仅在具有卸料管的锥底模型才能得到，这些结果对于进一步热工水力学分析及安全分析有着重要的意义。The physical model of the pebble bed reactor with cone-bottom and dischargetube, mesh pattern and simulant calculation on the multi-cycle scheme of fuel elememtsare described. Based on the examples,the effect of cone-bottom and discharge tube on thephysical performance is analysed. The computational results show that there is a slightdifference for multiplication factor Keff, average burnup, maximum power density and burnup of discharged fuel elements in each channel between the model with and without conebottom and discharge tube. But local power density distribution, neutron flux distributionand temperature distribution in cone-bottom and discharge tube can only be obtained fromthe model of the reactor with cone-bottom and discharge tube. It is useful for further thermal hydraulic research and safety analysis.

关 键 词：高温堆 卸料管 功率密度 燃耗 气冷堆 

分 类 号：TL424[核科学技术—核技术及应用]