核电厂凝汽器橡胶伸缩节加速老化原因分析

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Cause Analysis for Accelerated Aging of Condenser Rubber Expansion Joint in NPPs

1. China Nuclear Power Technology Research Institute, Shenzhen, Guangdong, 518124, China;
2. China Electric-Science Research Institute, Beijing, 100055, China

摘要: 根据大亚湾核电站凝汽器狗骨形橡胶伸缩节的实际情况,结合国外电厂的经验,分析了凝汽器狗骨形橡胶伸缩节加速老化的根本原因。对伸缩节进行了寿命评估,并给出了具体的管理对策和建议。分析表明,伸缩节老化的机理是力学、环境等因素引起的脆化老化、疲劳老化、接触介质老化及应力疲劳与热老化;其中主要老化机理是脆化老化。
- 伸缩节 /
- 加速老化 /
- 老化机理
Abstract: This paper analyzes the root cause for the accelerated aging of condenser rubber expansion joint according to the actual condition in Daya Bay Nuclear Power Plant and the experience feedback from overseas nuclear power plants.Life assessment is taken for rubber expansion joints and some specific management strategies and suggestions are recommended.The result shows that the aging mechanism of the rubber expansion joints include the embrittlement aging,fatigue aging,contacted media aging,stress fatigue and thermal aging caused by mechanics and environment.Embrittlement aging is the main aging mechanism.
- Rubber expansion joint /
- Accelerated aging /
- Aging mechanism