Nuclear Engineering and Technology

  • 제56권4호
  • /
  • Pages.1284-1295
  • /
  • 2024
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  • 1738-5733(pISSN)
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  • 2234-358X(eISSN)
한국원자력학회 (Korean Nuclear Society)
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Robust transformer-based anomaly detection for nuclear power data using maximum correntropy criterion

  • Shuang Yi (College of Electrical Engineering & New Energy, China Three Gorges University) ;
  • Sheng Zheng (College of Electrical Engineering & New Energy, China Three Gorges University) ;
  • Senquan Yang (China Nuclear Industry Key Laboratory of Simulation Technology) ;
  • Guangrong Zhou (College of Science, China Three Gorges University) ;
  • Junjie He (College of Science, China Three Gorges University)
  • 투고 : 2023.06.16
  • 심사 : 2023.11.17
  • 발행 : 2024.04.25
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초록

Due to increasing operational security demands, digital and intelligent condition monitoring of nuclear power plants is becoming more significant. However, establishing an accurate and effective anomaly detection model is still challenging. This is mainly because of data characteristics of nuclear power data, including the lack of clear class labels combined with frequent interference from outliers and anomalies. In this paper, we introduce a Transformer-based unsupervised model for anomaly detection of nuclear power data, a modified loss function based on the maximum correntropy criterion (MCC) is applied in the model training to improve the robustness. Experimental results on simulation datasets demonstrate that the proposed Trans-MCC model achieves equivalent or superior detection performance to the baseline models, and the use of the MCC loss function is proven can obviously alleviate the negative effect of outliers and anomalies in the training procedure, the F1 score is improved by up to 0.31 compared to Trans-MSE on a specific dataset. Further studies on genuine nuclear power data have verified the model's capability to detect anomalies at an earlier stage, which is significant to condition monitoring.

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과제정보

This research was funded by the CNNC Key Laboratory of Nuclear Industry Simulation Technology External Open Fund Project (B220631).

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