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Research on the Measurement Method of the Prompt Neutron Decay Constant Based on LHS-DMD-Rossi-Alpha

Author

Listed:
  • Junguang Li

    (School of Nuclear Science and Technology, University of South China, Hengyang 421001, China
    Key Lab of Advanced Nuclear Energy Design and Safety, Ministry of Education, Hengyang 421001, China)

  • Jinsen Xie

    (School of Nuclear Science and Technology, University of South China, Hengyang 421001, China
    Key Lab of Advanced Nuclear Energy Design and Safety, Ministry of Education, Hengyang 421001, China)

  • Nianbiao Deng

    (School of Nuclear Science and Technology, University of South China, Hengyang 421001, China
    Key Lab of Advanced Nuclear Energy Design and Safety, Ministry of Education, Hengyang 421001, China)

  • Erpin Zhang

    (School of Nuclear Science and Technology, University of South China, Hengyang 421001, China
    Key Lab of Advanced Nuclear Energy Design and Safety, Ministry of Education, Hengyang 421001, China)

  • Zhiqiang Wu

    (School of Nuclear Science and Technology, University of South China, Hengyang 421001, China
    Key Lab of Advanced Nuclear Energy Design and Safety, Ministry of Education, Hengyang 421001, China)

  • Ji Tong

    (School of Nuclear Science and Technology, University of South China, Hengyang 421001, China
    Key Lab of Advanced Nuclear Energy Design and Safety, Ministry of Education, Hengyang 421001, China)

  • Tao Yu

    (School of Nuclear Science and Technology, University of South China, Hengyang 421001, China
    Key Lab of Advanced Nuclear Energy Design and Safety, Ministry of Education, Hengyang 421001, China)

Abstract

In response to the significant dependency on empirical judgment in measuring the prompt neutron decay constant with the traditional Rossi-alpha method and the issue of requiring an excessive number of detectors with the DMD-Rossi-alpha method, this paper introduces a calculation method for the prompt neutron decay constant based on a combination of Latin Hypercube Sampling (LHS), Dynamic Mode Decomposition (DMD), and the Rossi-alpha method. Initially, the method uses LHS to expand the sample dataset of neutron noise data to reduce the number of detectors required. It then employs the Rossi-alpha method to construct a Rossi-alpha distribution model from neutron noise data. Finally, it utilizes DMD for feature extraction from the Rossi-alpha distribution model, thereby determining the prompt neutron decay constant. Research findings demonstrate that, by simulating the KUCA facility using RMC3.5 in a near-critical state, the relative error of the α value calculated by the LHS-DMD-Rossi-alpha method model is 9% less than that calculated by the Rossi-alpha method. This approach, capable of enhancing the precision of measuring the prompt neutron decay constant with just a single detector, holds significant theoretical value and engineering significance for the advancement of reactor physics and experimental techniques.

Suggested Citation

  • Junguang Li & Jinsen Xie & Nianbiao Deng & Erpin Zhang & Zhiqiang Wu & Ji Tong & Tao Yu, 2024. "Research on the Measurement Method of the Prompt Neutron Decay Constant Based on LHS-DMD-Rossi-Alpha," Energies, MDPI, vol. 17(9), pages 1-13, April.
  • Handle: RePEc:gam:jeners:v:17:y:2024:i:9:p:2034-:d:1382692
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