Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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Differential die-away technology applied to detect special nuclear materials

  • Lianjun Zhang (Department of Nuclear Technology and Application, China Institute of Atomic Energy) ;
  • Mengjiao Tang (Department of Nuclear Technology and Application, China Institute of Atomic Energy) ;
  • Chen Zhang (Department of Nuclear Technology and Application, China Institute of Atomic Energy) ;
  • Yulai Zheng (Department of Nuclear Technology and Application, China Institute of Atomic Energy) ;
  • Yong Li (Department of Nuclear Technology and Application, China Institute of Atomic Energy) ;
  • Chao Liu (Department of Nuclear Technology and Application, China Institute of Atomic Energy) ;
  • Qiang Wang (Department of Nuclear Technology and Application, China Institute of Atomic Energy) ;
  • Guobao Wang (Department of Nuclear Technology and Application, China Institute of Atomic Energy)
  • Received : 2022.11.07
  • Accepted : 2023.01.27
  • Published : 2023.07.25
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Abstract

Differential die-away analysis (DDAA) technology is a special nuclear material (SNM) active detection analysis technology. Be a nuclear material shielded or not, the technology can reveal the existence of nuclear materials by inducing fission from an external pulsed neutron source. In this paper, a detection model based on DDAA analysis technology was established by geant4 Monte Carlo simulation software, and the optimal sensitivity of the detection system is achieved by optimizing different configurations. After the geant4 simulation and optimization, a prototype was established, and experimental research was carried out. The result shows that the prototype can detect 200 g of 235U in a steel cylinder shield that's of 1.5 cm in inner diameter, 10 cm in thickness and 280 kg in weight.

Keywords

Acknowledgement

This work was supported by the Continuous basic scientific research project.

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