摘要
压水堆燃料组件的燃料棒依靠格架进行夹持,保持燃料棒的横向和轴向定位。在燃料组件弯曲时,燃料棒与格架产生相对滑移,是燃料组件产生横向非线性特征的主要原因。本文分析典型的压水堆燃料组件格架和燃料棒夹持系统的设计特点,结合分析和试验结果,将夹持系统的滑移和弯曲特性分解为滑移单元和旋转弹簧单元的效应,从而实现夹持系统的力学模拟。通过计算与试验结果比较,验证所建立的夹持系统模型的有效性。将夹持系统模型用于燃料组件横向非线性模型中,通过模型计算与燃料组件横向拉伸试验结果对比,符合性良好。
In PWR fuel assembly design, the fuel rod is usually clamped by grids to maintain its position laterally and axially. Fuel rod may slide relative to grid when fuel assembly bows, which brings non-linear characteristics to fuel assembly laterally. This paper includes the analysis of typical fuel assembly grid to fuel rod clipping system. Based on the analysis and the test, the characteristic curve of bending of the clamping system is considered as the combination of several sliding elements and spring elements, mechanical simula- tion of the clamping system is consequently established. Finally, the comparison of calculation results and test results are presented, thus the mechanical simulation is qualified. The model of clamping system is adopted by fuel assembly lateral model, which exhibit a good accordance to fuel assembly lateral pluck test results.
出处
《核动力工程》
EI
CAS
CSCD
北大核心
2013年第6期48-51,共4页
Nuclear Power Engineering
关键词
燃料组件
横向
非线性
格架
燃料棒
夹持系统
Fuel assembly, Lateral, Non-linear, Grid, Fuel rod, Clamping system
