• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>International conference on nuclear engineering >PREDICTING THERMAL MIXING AND FATIGUE INSIDE CONTROL ROD GUIDE TUBES
【24h】

PREDICTING THERMAL MIXING AND FATIGUE INSIDE CONTROL ROD GUIDE TUBES

机译：预测控制杆导向管内部的热混合和疲劳

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The cracked control rods shafts found in two Swedish NPPs were subjected to thermal fatigue due to mixing of cold purge flow with hot bypass water in the upper part of the top tube on which the control rod guide tubes rests. The interaction between the jets formed at the bypass water inlets is the main source of oscillation resulting in low frequency downward motion of hot bypass water into the cold purge flow. This ultimately causes thermal fatigue in the control rod shaft in the region below the four lower bypass water inlets. The transient analyses shown in this report were done to further investigate this oscillating phenomenon and compare to experimental measurements of water temperatures inside the control rod guide tube. The simulated results show good agreement with experimental data regarding all important variables for the estimation of thermal fatigue such as peak-to-peak temperature range, frequency of oscillation and duration of the temperature peaks. The results presented in this report show that CFD using LES methodology and the open source toolbox OpenFOAM is a viable tool for predicting complex turbulent mixing flows and thermal loads.
机译：在两个瑞典NPP中发现的破裂的控制杆轴，由于冷吹扫气流与热旁通水在顶管上部的顶部混合在一起而遭受热疲劳，顶杆的上部放置有控制杆导管。旁路水进口处形成的射流之间的相互作用是振荡的主要来源，导致热旁路水向低频吹扫气流的低频向下运动。最终，这会在四个下部旁通水入口下方的区域中引起控制杆轴的热疲劳。进行本报告中显示的瞬态分析是为了进一步研究这种振荡现象，并将其与控制杆导管内水温的实验测量值进行比较。仿真结果表明，与用于估算热疲劳的所有重要变量（例如峰峰值温度范围，振荡频率和温度峰值持续时间）有关的实验数据吻合良好。该报告中显示的结果表明，使用LES方法和开放源工具箱OpenFOAM的CFD是预测复杂湍流混合流量和热负荷的可行工具。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号