Monte Carlo simulation of neutron sensitivity of microfission chamber in neutron flux measurement

Ze-Peng Wu; Xin-Biao Jiang; Wen-Shou Zhang; Chun-Lei Su; Yong-Gang Zhang-Sun; Li-Hong Bao

doi:10.1007/s41365-022-01062-6

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Monte Carlo simulation of neutron sensitivity of microfission chamber in neutron flux measurement

NUCLEAR ENERGY SCIENCE AND ENGINEERING | Updated：2022-07-27

- Monte Carlo simulation of neutron sensitivity of microfission chamber in neutron flux measurement
- Nuclear Science and Techniques Vol. 33, Issue 6, Article number: 78(2022)
- Affiliations：
  
  1.State Key Laboratory of Simulation and Effect for Intense Pulse Radiation, Northwest Institute of Nuclear Technology, Xi'an 710024, China
- Author bio：
  
  jiangxb67@163.com; 906692069@qq.com
- Funds：
- DOI：10.1007/s41365-022-01062-6
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Ze-Peng Wu, Xin-Biao Jiang, Wen-Shou Zhang, et al. Monte Carlo simulation of neutron sensitivity of microfission chamber in neutron flux measurement. [J]. Nuclear Science and Techniques 33(6):78(2022)
DOI：

Ze-Peng Wu, Xin-Biao Jiang, Wen-Shou Zhang, et al. Monte Carlo simulation of neutron sensitivity of microfission chamber in neutron flux measurement. [J]. Nuclear Science and Techniques 33(6):78(2022) DOI： 10.1007/s41365-022-01062-6.

摘要

Abstract

Microfission chambers loaded with highly enriched fissile materials are widely used for measuring power in reactors. The neutron sensitivity of the microfission chamber is a key parameter that determines the accuracy of the power measurement. To evaluate the performance of the FC4A microfission chamber, in this work, we introduced an accurate and validated model of the microfission chamber, a performed Monte Carlo simulation of the neutron sensitivity of the microfission chamber with GEANT4 code, and conducted an irradiation experiment on the neutron irradiation effect platform #3 of the Xi'an Pulsed Reactor. We compared the simulated sensitivity with the experimental results, which showed that the sensitivity obtained from the simulation was in good agreement with the experimental results. In addition, we studied the impact of the design parameters of the fission chamber on the calculated neutron sensitivity of the microfission chamber.

关键词

Keywords

Micro fission chamberNeutron sensitivityMonte Carlo simulationGEANT4

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Higher Institute of Medical Technologies of Tunis, Tunis El Manar University

Nuclear Physics and High Energy Unit, Faculty of Sciences of Tunis, Tunis El Manar University

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