摘要
为研究运动条件下铅铋反应堆热工水力特性,开发了运动条件铅铋反应堆瞬态分析系统程序,并完成了对设计的5 MW自然循环小型模块化铅铋反应堆的建模,分析了运动条件对反应堆自然循环热工水力特性的影响。计算结果表明,倾斜条件下,堆芯流量减小,堆芯出口温度升高,在计算最大倾斜角度下,流量减小20%,冷却剂堆芯出口温度升高20℃。起伏条件下,起伏幅度和起伏周期越大,对反应堆影响越大,由于系统阻力影响,流量变化较起伏加速度有小于1 s的延时。摇摆条件下,摇摆角度越大和摇摆周期越小,对反应堆影响越大,燃料包壳峰值温度较稳态值高20℃以内,对反应堆正常运行时安全性影响较小。
In order to study the thermal-hydraulic characteristics of the lead-bismuth reactor under moving conditions,the transient analysis system program for the lead-bismuth reactor was developed,and the numerical model of the designed 5 MW natural circulation small modular lead-bismuth reactor was completed.The results show that under inclined conditions,the core mass flow rate decreases and the core outlet temperature increases.At the maximum inclined angle,the mass flow rate decreases by 20%and the core outlet temperature increases by 20℃.Under heaving conditions,the larger the fluctuation amplitude and the fluctuation period are,the greater impact on the reactor will be.Due to the flow resistance,the flow rate change has a delay of less than 1 s compared to the additional acceleration.Under rolling conditions,larger rolling amplitude angle and smaller rolling period will induce greater influence on the reactor.The peak temperature of the fuel cladding is within 20℃higher than the steady-state value,which has little effect on the safety of the reactor.
作者
刘志鹏
王成龙
张大林
田文喜
秋穗正
苏光辉
LIU Zhipeng;WANG Chenglong;ZHANG Dalin;TIAN Wenxi;QIU Suizheng;SU Guanghui(School of Nuclear Science and Technology,Xi’an Jiaotong University,Xi’an 710049,China;State Key Labrratrry of Multiphase Flow in Poxver Engineering,Xi’an Jiaotong University,Xi’an 710049,China)
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
2021年第5期811-821,共11页
Atomic Energy Science and Technology
基金
国家重点研发计划资助项目(2019YFB1901300)
国家自然科学基金资助项目(11905168)。
关键词
小型模块化铅铋反应堆
运动条件
自然循环
热工水力
small modular lead-bismuth reactor
moving condition
natural circulation
thermal-hydraulic
