核电厂控制棒导向筒开口销超声检测系统设计开发

Development of Ultrasonic Inspection System for Control Rod Guide Split Pins in Nuclear Power Plants

控制棒导向筒开口销是核电厂堆内构件的关键连接部件,长期运行后应力腐蚀裂纹是影响开口销质量的重要隐患。为实现控制棒导向筒开口销的高效精确检查,设计了一种多晶片集成的插片状超声探头,并搭建了一套适用于水下自动无损检测的系统,并进行了系统测试和验证,结果表明开口销检测系统具有较高检测效率和任务适应性,为现场的应用检查提供了基础。

The control rod guide split pin is a key connecting part of the nuclear power plant reactor internals. Stress corrosion cracking is an important potential danger that affects the quality of the split pin after long-term operation. In order to achieve an efficient and accurate inspection of the control rod guide split pin, a multi-chip integrated card-shaped ultrasonic probe is designed in this paper, and a system suitable for automatic underwater non-destructive testing is established. The results show that the split pin inspection system is with high detection efficiency and task adaptability, which provides a basis for field application inspection.