Neutronics analysis of a stacked structure for a subcritical system with LEU solution driven by a D-T neutron source for<sup> 99</sup>Mo production

Lei Ren; Yun-Cheng Han; Jia-Chen Zhang; Xiao-Yu Wang; Tao-Sheng Li; Jie Yu

doi:10.1007/s41365-021-00968-x

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Neutronics analysis of a stacked structure for a subcritical system with LEU solution driven by a D-T neutron source for⁹⁹Mo production

NUCLEAR PHYSICS AND INTERDISCIPLINARY RESEARCH | Updated：2021-12-06

- Neutronics analysis of a stacked structure for a subcritical system with LEU solution driven by a D-T neutron source for⁹⁹Mo production
- Nuclear Science and Techniques Vol. 32, Issue 11, Article number: 123(2021)
- Affiliations：
  
  1.Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
  2.University of Science and Technology of China, Hefei 230026, China
- Author bio：
  
  yuncheng_han@163.com
- Funds：
- DOI：10.1007/s41365-021-00968-x
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Lei Ren, Yun-Cheng Han, Jia-Chen Zhang, et al. Neutronics analysis of a stacked structure for a subcritical system with LEU solution driven by a D-T neutron source for⁹⁹Mo production. [J]. Nuclear Science and Techniques 32(11):123(2021)
DOI：

Lei Ren, Yun-Cheng Han, Jia-Chen Zhang, et al. Neutronics analysis of a stacked structure for a subcritical system with LEU solution driven by a D-T neutron source for⁹⁹Mo production. [J]. Nuclear Science and Techniques 32(11):123(2021) DOI： 10.1007/s41365-021-00968-x.

摘要

Abstract

The utilization of neutrons markedly affects the medical isotope yield of a subcritical system driven by an external D-T neutron source. The general methods to improve the utilization of neutrons include moderating, multiplying, and reflecting neutrons, which ignores the use of neutrons that backscatter to the source direction. In this study, a stacked structure was formed by assembling the multiplier and the low-enriched uranium (LEU) solution to enable the full use of neutrons that backscatter to the source direction and further improve the utilization of neutrons. A model based on SuperMC was used to evaluate the neutronics and safety behavior of the subcritical system, such as the neutron effective multiplication factor, neutron energy spectrum, medical isotope yield, and heat deposition. Based on the calculation results, when the intensity of the neutron source was 5×10,13, n/s, the optimized design with a stacked structure could increase the yield of ,99,Mo to 182 Ci/day, which is approximately 16% higher than that obtained with a single-layer structure. The inlet H,2,O coolant velocity of 1.0 m/s and initial temperature of 20 °C were also found to be sufficient to prevent boiling of the fuel solution.

关键词

Keywords

Neutronics analysisStacked structure99Mo yieldSubcritical systemD-T neutron source

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Neutronics analysis of a stacked structure for a subcritical system with LEU solution driven by a D-T neutron source for 99Mo production

DOI：10.1007/s41365-021-00968-x

摘要

Abstract

关键词

Keywords

references

Neutronics analysis of a stacked structure for a subcritical system with LEU solution driven by a D-T neutron source for⁹⁹Mo production