CF系列燃料组件落棒性能综合评价  

Synthetic Evaluation of RCCA Dropping and Damping Process in CF Series Fuel Assembly

作　　者：郭晓明[1] 马超[1] 陈平[1] 肖忠[1] 蒲曾坪[1] 秦勉[1] 

机构地区：[1]中国核动力研究设计院核反应堆系统设计技术重点实验室,成都610213

出　　处：《核动力工程》2017年第6期167-169,共3页Nuclear Power Engineering

摘　　要：核电压水堆燃料组件中导向管主要功能是为控制棒组件的快速下插提供通道,并且依靠导向管下部缓冲段结构减缓控制棒下落速度,减小冲击力,保证燃料组件结构完整。首先运用落棒时程分析程序(CIGAL)计算得到CF系列燃料组件落棒时间,再利用落棒缓冲分析程序(SAM)计算CF系列燃料组件中缓冲过程冲击力。结果表明:CF3相对于CF2,随着导向管内径减小以及轴肩螺钉孔长度增加,落棒时间变长;落棒过程中缓冲段内压强最大值增大;控制棒组件对燃料组件上管座冲击力最大值减小;控制棒组件撞击之前控制棒在缓冲段内运动时间变长。In the process of rod cluster control assemblies （RCCA） dropping in PWRs, the guide thimble of the fuel assembly supplies a tunnel for the control rod, and the dashpot structure which is designed below the guide thimble, in order to decrease the impact force and ensure the safety of the fuel assembly. In this paper, with the CIGAL and SAM program, the analysis about the RCCA dropping and damping process is carried out to obtain the drop time and the impact force on the top nozzle in the series CF fuel assembly which includes CF2 and CF3. The calculation results demonstrate that： from CF2 to CF3, with the increasing of the screw hole length and the decreasing of the guide thimble inner diameter, the drop time gets longer, the max impact force on the top nozzle gets smaller, the damping time in the dashpot gets longer, and the pressure in the dashpot get larger.

关 键 词：落棒时间 落棒冲击力 CF燃料组件 

分 类 号：TL352[核科学技术—核技术及应用]