Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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Application of artificial neural network for the critical flow prediction of discharge nozzle

  • Xu, Hong (Energy Technology R&D Division, Jinyuyun Energy Technology Co., Ltd.) ;
  • Tang, Tao (Energy Technology R&D Division, Jinyuyun Energy Technology Co., Ltd.) ;
  • Zhang, Baorui (Institute of Nuclear and New Energy Technology, Tsinghua University) ;
  • Liu, Yuechan (Department of Mathematics, Karlsruhe Institute of Technology (KIT))
  • Received : 2021.05.22
  • Accepted : 2021.08.25
  • Published : 2022.03.25
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Abstract

System thermal-hydraulic (STH) code is adopted for nuclear safety analysis. The critical flow model (CFM) is significant for the accuracy of STH simulation. To overcome the defects of current CFMs (low precision or long calculation time), a CFM based on a genetic neural network (GNN) has been developed in this work. To build a powerful model, besides the critical mass flux, the critical pressure and critical quality were also considered in this model, which was seldom considered before. Comparing with the traditional homogeneous equilibrium model (HEM) and the Moody model, the GNN model can predict the critical mass flux with a higher accuracy (approximately 80% of results are within the ±20% error limit); comparing with the Leung model and the Shannak model for critical pressure prediction, the GNN model achieved the best results (more than 80% prediction results within the ±20% error limit). For the critical quality, similar precision is achieved. The GNN-based CFM in this work is meaningful for the STH code CFM development.

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References

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