Validity Analysis of Rolled Plugs of Steam Generators Tube
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摘要: 蒸汽发生器传热管是核电厂—回路压力边界的薄弱环节,传热管的完整性直接影响到整个一次侧的安全。当传热管出现裂纹、腐蚀或磨损等缺陷时,在评定确认可能会发生一次侧流体进入二次侧情况下,需要对传热管进行堵管。利用有限元法对某蒸汽发生器传热管的滚压堵头进行分析评定,模拟计算在堵管时以及堵管后堵头、传热管接触力情况,通过计算及分析确认堵头在极限运行工况的有效性,计算显示此堵头满足强度要求。Abstract: The steam generators tube is a vulnerable part of the primary pressure boundary in nuclear power plants,and its integrity directly affects the safety of NPPs.The tube needs to be plugged when the steam generator（SG） primary side water may leak out to the secondary side because of crack,wear or corrosion of the tube.This paper analyzes a SG tube rolling plug with FEM,simulates and calculates the contact stress between the plug and tube in the process of the rolling plug and after the rolling,to confirm the validity of the plug.The result shows the plug meets the strength requirements.
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Key words:
- Heat transfer tube /
- Plug /
- Validity /
- FEM
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