Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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A comparative study of different radial basis function interpolation algorithms in the reconstruction and path planning of γ radiation fields

  • Yulong Zhang (School of Nuclear Science and Technology, University of South China) ;
  • Jinjia Cao (School of Nuclear Science and Technology, University of South China) ;
  • Biao Zhang (School of Nuclear Science and Technology, University of South China) ;
  • Xiaochang Zheng (School of Nuclear Science and Technology, University of South China) ;
  • Wei Chen (School of Nuclear Science and Technology, University of South China)
  • Received : 2023.04.26
  • Accepted : 2024.02.22
  • Published : 2024.07.25
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Abstract

Accurate reconstruction of radiation field and path planning are very important for the safety of operators in the process of dismantling nuclear facilities. Based on radial basis function (RBF) interpolation algorithm, this paper discussed the application of inverse multiquadric radial basis Function (IMRBF) interpolation method to the reconstruction of gamma radiation field, and proved the feasibility of reconstructing a radiation field with multiple γ sources. The average relative errors of IMRBF interpolation results were 4.28% and 8.76%, respectively, for the experimental scenarios with single and double gamma sources. After comparing the consistency between the simulated scene and the experimental scene, IMRBF method and Cubic Spline method were respectively used to reconstruct the gamma radiation field by Geant4 simulation data. The results showed that the interpolation accuracy of IMRBF method was superior to that of Cubic Spline method. Further, more RBF interpolation algorithms were used to reconstruct the multi-γ source radiation field, and then the Probabilistic Roadmap (PRM) algorithm was used to optimize the human walking path in the radiation field reconstructed by different interpolation methods. The optimal paths in radiation fields generated by multiple interpolation methods were compared. The results herein contribute to a comprehensive understanding of RBF interpolation methods in reconstructing γ radiation fields and their application in optimizing paths in radiation environments. The insights may provide valuable information for decision-making in radiation protection during the decommissioning of nuclear facilities.

Keywords

Acknowledgement

This research was funded by ITER Project of Ministry of Science and Technology (2022YFE03080002), the Key Laboratory of Magnetic Confinement Nuclear Fusion Research in Hengyang (Grant No. 2018KJ108), the Hunan Nuclear Fusion International Science and Technology Innovation Cooperation Base (Grant No. 2018WK4009), and Key Fund Project of Hunan Provincial Department of Education (20A417).

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