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http://dx.doi.org/10.1016/j.net.2022.02.024

Graph neural network based multiple accident diagnosis in nuclear power plants: Data optimization to represent the system configuration  

Chae, Young Ho (Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology)
Lee, Chanyoung (Korea Atomic Energy Research Institute)
Han, Sang Min (Samsung Electronics)
Seong, Poong Hyun (Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology)
Publication Information
Nuclear Engineering and Technology / v.54, no.8, 2022 , pp. 2859-2870 More about this Journal
Abstract
Because nuclear power plants (NPPs) are safety-critical infrastructure, it is essential to increase their safety and minimize risk. To reduce human error and support decision-making by operators, several artificial-intelligence-based diagnosis methods have been proposed. However, because of the nature of data-driven methods, conventional artificial intelligence requires large amount of measurement values to train and achieve enough diagnosis resolution. We propose a graph neural network (GNN) based accident diagnosis algorithm to achieve high diagnosis resolution with limited measurements. The proposed algorithm is trained with both the knowledge about physical correlation between components and measurement values. To validate the proposed methodology has a sufficiently high diagnostic resolution with limited measurement values, the diagnosis of multiple accidents was performed with limited measurement values and also, the performance was compared with convolution neural network (CNN). In case of the experiment that requires low diagnostic resolution, both CNN and GNN showed good results. However, for the tests that requires high diagnostic resolution, GNN greatly outperformed the CNN.
Keywords
Multiple accident; Nuclear power plant; Graph; Graph neural network;
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