一回路腔室结构对自然循环铅基快堆堆芯流量分配特性影响研究  

Study on the influence of the geometry of the primary circuit plenum on the core flow distribution characteristics of the natural circulation lead-based fast reactor

作　　者：王天石 赵鹏程[1,2] 刘紫静[1] 谢金森[1] WANG Tianshi;ZHAO Pengcheng;LIU Zijing;XIE Jinsen(College of Nuclear Science and Technology,University of South China,Hengyang 421001,China;Cooperative Innovation Center for Nuclear Fuel Cycle Technology and Equipment,University of South China,Hengyang 421001,China)

机构地区：[1]南华大学核科学技术学院,衡阳421001 [2]南华大学核燃料循环技术与装备湖南省协同创新中心,衡阳421001

出　　处：《核技术》2020年第3期59-65,共7页Nuclear Techniques

基　　金：国家自然科学基金(No.11905101);湖南省自然科学基金项目(No.2019JJ40239);核燃料循环技术与装备湖南省协同创新中心开放基金项目(No.2019KFZ08)资助~~

摘　　要：堆芯流量分配特性是自然循环铅基快堆热工水力设计的重要内容,一回路腔室几何结构是影响堆芯流量分配特性的重要因素之一。利用计算流体力学方法(Computational Fluid Dynamics,CFD)模拟小型模块化自然循环铅冷快堆(Small Modular Natural Circulation Lead-cooled Fast Reactor-10 MW,SNCLFR-10)一回路流场,分别研究一回路上腔室提升筒高度、中心测量柱半径及长度,下腔室深度、纵横比以及导流结构高度对堆芯流量分配特性的影响特性。研究结果表明:改变提升筒高度、中心测量柱半径及长度对堆芯流量分配特性影响较大;改变反应堆下腔室深度和下腔室纵横比对堆芯整体流量和流量分配特性所造成的影响不显著;在反应堆下腔室加装角状凸起形导流结构可有效改善下腔室流场,但无法有效改变堆芯流量分配特性。[Background] The flow distribution characteristic of core is an important consideration in the design of natural circulation lead-based fast reactor. The primary chamber geometry is one of the important factors affecting the flow distribution characteristic of core. [Purpose] This study aims to investigate the effects of the height of the chamber riser, the radius and length of the central measuring column, the depth of the lower chamber, the aspect ratio and the height of the diversion structure on the flow distribution characteristics of the core. [Methods] Computational fluid dynamics(CFD) method was employed to simulate the primary flow field of the natural circulation lead-based fast reactor SNCLFR-10, and the influence of the primary chamber geometry on the flow distribution characteristics was studied by changing the primary chamber geometry and observing the flow distribution characteristics of the core. [Results & Conclusions] Varying the height of the rising chamber, the radius of the central measuring column and the length of the measuring column in the geometric structure of the upper chamber results in a significant influence of core flow while changing the depth and aspect ratio of the lower chamber has no noteworth effect on the total flow and flow distribution of the core. The flow field in the lower chamber can be improved obviously by adding the angular convex diversion structure in the lower chamber, but its influence on the total flow and flow distribution of the core is not significant.

关 键 词：一回路腔室几何结构 流量分配特性 铅基快堆 自然循环 

分 类 号：TL334[核科学技术—核技术及应用]