地震激励下铅铋堆晃荡特性研究  

The Study on Sloshing of Lead-bismuth Pool Reactor Under Seismic Excitation

作　　者：陈亚楼 明平剑 于国鹏 赵俊龙 CHEN Yalou;MING Pingjian;YU Guopeng;ZHAO Junlong(Sino-French Institute of Nuclear Engineering&Technology,Sun Yat-sen University,Zhuhai 519000,China)

机构地区：[1]中山大学中法核工程与技术学院,珠海519000

出　　处：《工程热物理学报》2024年第12期3756-3761,共6页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.52006249)。

摘　　要：在地震激励下,铅铋重金属流体易在反应堆内发生晃荡现象并导致堆内结构破损,因而对于该现象的研究具有重要意义。本文以反应堆上腔式为模型,基于自研CFD计算平台进行数值模拟。考虑到铅铋反应堆对结构紧凑型设计的需求,对堆内构件排布进行了改进处理,并与改进前进行对比。研究结果表明,改进后的结构在激励频率较低时对晃荡的抑制作用并不明显,随着激励频率的提高,晃荡抑制作用逐渐增强,并将剧烈的晃荡破碎模态转变为较为稳定的旋转晃荡模态。该研究分析了不同工况下铅铋堆的晃荡现象,对堆内构件的排布进行改进处理,并验证了改进效果的合理性,为铅铋堆的设计提供了指导。Lead-bismuth heavy metal fuids tend to slosh in the reactor and cause damage to the reactor structure under seismic excitation,and it is of great significance to study this phenomenon.In this paper,the upper plenum of lead-bismuth reactor is employed as geometric model,and numerical simulation is carried out on the in-house CFD computing platform.In order to meet the compact design requirements of lead bismuth reactors,the arrangement of internal components has been optimized and the simulation results are compared.The research results show that the optimized structure has no obvious effect on sloshing suppression when the excitation frequency is low.As the excitation frequency increases,the sloshing suppression effect is gradually enhanced,and the severe sloshing mode is transformed into a relatively stable rotational sloshing mode.This paper has studied the sloshing phenomenon of the lead-bismuth pile under different working conditions,optimized the arrangement of the internal components,and verified the rationality of the improvement effect,which has provided guidance for the design of the lead-bismuth reactor.

关 键 词：铅铋 地震激励 构件排布 晃荡抑制 

分 类 号：TK-9[动力工程及工程热物理]