Development of the structural health record of containment building in nuclear power plant
Development of the structural health record of containment building in nuclear power plant
复制标题
DOI：
10.1016/j.net.2020.12.018
复制
发表时间：
2020-12
影响因子：
2.7
通讯作者：
S. Chu;Chan-Jung Kang
中科院分区：
文献类型：
--
作者：
S. Chu;Chan-Jung Kang
本文的主要目的是为核电厂结构健康监测和诊断提供可靠的常规标准操作程序（SOP）。目前，核电站都有监控系统，可以通过系统识别技术获取围堵建筑的定量健康记录。然而，由于测量信号经常受到噪声的干扰，如果直接采用测量数据，辨识结果可能会引入错误的结论。因此，本文推荐了信号筛选的SOP和所需的识别程序，以识别核电站CTMT的动态特性。在SOP中，提出了递推最小二乘（RLS）、观测器卡尔曼滤波识别/特征系统实现算法（OKID/ERA）和频响函数（FRF）三种推荐方法。通过比较不同方法的鉴定结果，可以对鉴定结果进行验证。最后，利用有限的地震记录，建立CTMT的初步健康记录。可作为加快重启程序的定量参考。如果在运行基础地震和安全停堆地震（OBE/SSE）之后CTMT的基频明显下降，则意味着应立即采取监管指南建议的重启行动。
The main objective of this work is to propose a reliable routine standard operation procedures (SOP) for structural health monitoring and diagnosis of nuclear power plants (NPPs). At present, NPPs have monitoring systems that can be used to obtain the quantitative health record of containment (CTMT) buildings through system identification technology. However, because the measurement signals are often interfered with by noise, the identification results may introduce erroneous conclusions if the measured data is directly adopted. Therefore, this paper recommends the SOP for signal screening and the required identification procedures to identify the dynamic characteristics of the CTMT of NPPs. In the SOP, three recommend methods are proposed including the Recursive Least Squares (RLS), the Observer Kalman Filter Identification/Eigensystem Realization Algorithm (OKID/ERA), and the Frequency Response Function (FRF). The identification results can be verified by comparing the results of different methods. Finally, a preliminary CTMT healthy record can be established based on the limited number of earthquake records. It can be served as the quantitative reference to expedite the restart procedure. If the fundamental frequency of the CTMT drops significantly after the Operating Basis Earthquake and Safe Shutdown Earthquake (OBE/SSE), it means that the restart actions suggested by the regulatory guide should be taken in place immediately.