高温气冷堆控制棒缓冲器的分析与试验验证  

Analysis and Test Verification of Control Rod Buffer in HTR

作　　者：王少华[1] 闫贺[1] 张作鹏[1] 刁兴中[1] 

机构地区：[1]清华大学核能与新能源技术研究院先进反应堆工程与安全教育部重点实验室,北京100084

出　　处：《原子能科学技术》2014年第4期685-691,共7页Atomic Energy Science and Technology

基　　金：国家科技重大专项资助项目(2008ZX06902-005)

摘　　要：高温气冷堆控制棒缓冲器是缓解极端事故工况下驱动线断裂产生控制棒跌落冲击的塑性变形吸能设备。利用经典圆柱壳轴压吸能模型设计出一种满足实际工况的薄壁壳结构,采用J-C本构模型,利用ABAQUS/explicit对该薄壁壳结构及控制棒建立有限元模型来模拟碰撞过程。基于分析结果,设计并进行了控制棒跌落试验。试验结果表明,全尺寸缓冲器受等重试验棒冲击后发生稳定渐进屈曲,有效缓冲了控制棒跌落冲击,其底部石墨结构未发生破坏,同时分析结果表明试验模型能包络代表实际反应堆中的跌落情况。The thin-walled shell buffer in high temperature gas-cooled reactor（HTR） was designed for absorbing the kinetic energy of the control rod drop in the drive line fracture accident.The thin-walled cylinder structure satisfying the requirements of actual working condition was design by using the energy absorption model of the classical cylinder shell under axial pressure.By using ABAQUS/explicit with J-C constitutive model,the finite element models of both the real reactor condition and the test condition were built to simulate the collision.Based on the analysis results,the control rod falldown test was designed and implemented.The test results demonstrate that stable progressive buckling occurs when the full size buffer is impacted by equiponderance test bar,and the buffer can reduce the crush force effectively and protect the graphite from being destroyed.The analysis results show that the test model can represent and envelope the real condition in reactor.

关 键 词：薄壁壳缓冲器 控制棒 跌落冲击 有限元分析 

分 类 号：TL35[核科学技术—核技术及应用]