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钱虹, 于凯翔, 徐志辉, 苏晓燕. 不同冗余模式下泵组数字化控制可靠性研究[J]. 原子核物理评论, 2023, 40(2): 314-326. DOI: 10.11804/NuclPhysRev.40.2022062
引用本文: 钱虹, 于凯翔, 徐志辉, 苏晓燕. 不同冗余模式下泵组数字化控制可靠性研究[J]. 原子核物理评论, 2023, 40(2): 314-326. DOI: 10.11804/NuclPhysRev.40.2022062
Hong QIAN, Kaixiang YU, Zhihui XU, Xiaoyan SU. Research on Digital Control Reliability of Pump Groups Under Different Redundancy Modes[J]. Nuclear Physics Review, 2023, 40(2): 314-326. DOI: 10.11804/NuclPhysRev.40.2022062
Citation: Hong QIAN, Kaixiang YU, Zhihui XU, Xiaoyan SU. Research on Digital Control Reliability of Pump Groups Under Different Redundancy Modes[J]. Nuclear Physics Review, 2023, 40(2): 314-326. DOI: 10.11804/NuclPhysRev.40.2022062

不同冗余模式下泵组数字化控制可靠性研究

Research on Digital Control Reliability of Pump Groups Under Different Redundancy Modes

  • 摘要: 冗余泵组广泛存在于核电厂各关键部分,对于核电安全方面极为重要。为提高其可靠性,对冗余泵组数字化控制在不同冗余模式下的可靠性进行建模并比较分析。首先根据冗余泵组数字化控制系统在三种冗余模式下不同的运行和控制逻辑建立泵组失效的动态故障树模型。其次,采用最小割集法并建立Markov模型得到三种模式下动态故障树的求解方式。最后,以核电厂RCV系统上充泵数字化控制系统为例,对其在三种冗余模式下的可靠性进行定量分析。研究结果表明:在正常运行工况下,上充泵数字化控制的双热备用冗余模式可靠性为三者最高,冷热备用冗余模式的可靠性居中,双冷备用冗余模式的可靠性最低。本文的研究可以为提高冗余泵组数字化控制的可靠性提供参考。

     

    Abstract: Redundant pump groups are widely used in various critical parts of nuclear power plants and play a vital role in ensuring nuclear safety. To enhance their reliability, this study models and analyzes the reliability of digital control of redundant pump groups under different redundancy modes. Firstly, a dynamic fault tree model of pump group failure is established based on the different operation and control logic of the digital control system for redundant pump groups under three redundancy modes. Secondly, the minimum cut-set method is employed, and a Markov model is constructed to obtain the solution approach for the dynamic fault tree under three modes. Finally, taking the digital control system for charging pumps in the RCV system of a nuclear power plant as a case study, the reliability of the system is quantitatively analyzed under the three redundancy modes. The research results indicate that, under normal operating conditions, the double hot standby redundancy mode exhibits the highest reliability for the digital control of charging pumps, followed by the cold-hot standby redundancy mode, while the double cold standby redundancy mode shows the lowest reliability. The present study provides valuable insights for improving the reliability of digital control for redundant pump groups.

     

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