蒸汽发生器传热管的微动磨损损伤及预测模型

蒸汽发生器是核电厂中能量转换的关键装备,内部高速流经的高温、高压流体引起传热管流激振动,造成传热管微动磨损损伤,严重时发生管道破裂。文章介绍了传热管典型的微动磨损失效案例,相应的模拟实验研究结果,以及机械磨损与冲蚀-腐蚀共同作用的损伤机制。采用工作率模型可对传热管的磨损失效进行合理的寿命预测评估,该预测模型已经在核电厂安全评估方面应用。

Fretting Wear Damage of Steam Generator Tubes and Its Prediction Modeling

The steam generator is the key equipment used for the energy transition in nuclear power plant. Since the high-temperature and high-pressure fluid flows with high speed, the steam generator tubes will be excited and vibrate, leading to the tremendous fretting wear problem on the tubes, sometimes even leading to tube cracking. This paper introduces typical fretting wear cases, the result of corresponding simulation wear experiment and damage mechanism which combining mechanical wear and erosion-corrosion. Work rote model could give a reasonable life prediction about the steam generator tube, and this predictive model has been used in nuclear power plant safety assessment.