核电站人员闸门用O形密封圈研究

发布时间：2018-04-23 18:27

本文选题：人员闸门 + 三元乙丙橡胶　；参考：《上海交通大学》2015年硕士论文

【摘要】：人员闸门及设备闸门是核电站安全壳的重要组成部分之一,承担了核电站最后一道安全屏障的作用,在反应堆各种工况下,能确保安全壳压力边界的密封性。闸门通过双道O形密封圈来实现其密封功能,密封圈材料的寿命、硬度及压缩率等性能指标对其密封性与可靠性起着决定性作用。本文以研发出满足第三代核电站安全性要求的人员闸门O形密封圈为目标,结合试验论证,综合分析了密封圈材料的老化机理和密封性能的可靠性,研发了符合AP1000核电机组要求的人员闸门O形密封圈的材料,确定其硬度和压缩率。本文对多种闸门用O形密封圈材料进行了热老化、辐照老化、机械疲劳老化等试验,并验证了在LOCA环境下的密封性能。同时还设计了应用性能试验台架,得到了完整试验数据及曲线,建立了材料硬度与压缩量之间的关系,证明所研发的新型O形密封圈在压缩量为1.6mm时就能够保证在各工况下人员闸门的密封性,减小了人员闸门对密封圈的压紧力,大大简化了传动系统的结构,性能明显优于现有密封圈。本文综合考虑设备可靠性及工程经济性等关键因素,所研发的人员闸门O形密封圈可直接应用于我国第三代核电站人员闸门及设备闸门中,过程中得到的试验数据也为核电站密封材料的设计和应用提供了理论及实践依据。
[Abstract]:The personnel gate and the equipment gate are one of the important components of the containment of the nuclear power plant. They play the role of the last safety barrier in the nuclear power plant. Under various conditions of the reactor, the sealing of the containment pressure boundary can be ensured. The sealing function of the gate is realized by double O-ring. The performance index of sealing material, such as life, hardness and compression ratio, plays a decisive role in its sealing ability and reliability. The aim of this paper is to develop the personnel gate O-shaped sealing ring which can meet the safety requirements of the third generation nuclear power plant. Combined with the test and demonstration, the aging mechanism of sealing ring material and the reliability of sealing performance are comprehensively analyzed. The material of O-ring for personnel gate of AP1000 nuclear power unit is developed and its hardness and compression ratio are determined. In this paper, thermal aging, irradiation aging, mechanical fatigue aging and so on have been carried out for various O-shaped sealing ring materials used in gate, and the sealing performance under LOCA environment has been verified. At the same time, the application performance test bench is designed, the complete test data and curves are obtained, and the relationship between the hardness of the material and the amount of compression is established. It is proved that the new O-shaped sealing ring can guarantee the sealing performance of the personnel gate under various working conditions when the compression quantity is 1.6mm, and reduce the compaction force of the personnel gate to the seal ring, which greatly simplifies the structure of the transmission system. The performance is obviously superior to the existing sealing ring. Considering the key factors of equipment reliability and engineering economy, the O-shaped sealing ring of personnel gate developed in this paper can be directly applied to the personnel gate and equipment gate of the third generation nuclear power plant in China. The experimental data also provide theoretical and practical basis for the design and application of nuclear power plant sealing materials.
【学位授予单位】：上海交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM623

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