Simulated analysis of the influence factor of the neutron response in neutron shielding testing system

GUO Guangshui; ZHANG Long; MENG Xianfang; CAO Ke; QIN Peizhong

doi:10.11889/j.0253-3219.2019.hjs.42.090503

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Simulated analysis of the influence factor of the neutron response in neutron shielding testing system

NUCLEAR PHYSICS, INTERDISCIPLINARY RESEARCH | 更新时间：2024-10-25

- Simulated analysis of the influence factor of the neutron response in neutron shielding testing system
- NUCLEAR TECHNIQUES Vol. 42, Issue 9, Article number: 090503(2019)
- 作者机构：
  
  北京市射线应用研究中心北京辐射新材料重点实验室北京 100012
- 作者简介：
  
  GUO Guangshui, male, born in 1982, graduated from University of South China with a master’s degree in 2008, focusing on application of nuclear technology
  ZHANG Long, E-mail: zhanglong_fang@sina.cn
- 基金信息：
- DOI：10.11889/j.0253-3219.2019.hjs.42.090503
  CLC： TL81
- Received：30 January 2019，
  
  Revised：14 June 2019，
  
  Published：10 September 2019
- 稿件说明：
移动端阅览
郭广水,张龙,孟宪芳等.中子屏蔽测试系统中子响应影响因素仿真分析[J].核技术,2019,42(09):60-66.

GUO Guangshui,ZHANG Long,MENG Xianfang,et al.Simulated analysis of the influence factor of the neutron response in neutron shielding testing system[J].NUCLEAR TECHNIQUES,2019,42(09):60-66.
郭广水,张龙,孟宪芳等.中子屏蔽测试系统中子响应影响因素仿真分析[J].核技术,2019,42(09):60-66. DOI： 10.11889/j.0253-3219.2019.hjs.42.090503.

GUO Guangshui,ZHANG Long,MENG Xianfang,et al.Simulated analysis of the influence factor of the neutron response in neutron shielding testing system[J].NUCLEAR TECHNIQUES,2019,42(09):60-66. DOI： 10.11889/j.0253-3219.2019.hjs.42.090503.

摘要

目前屏蔽材料的中子屏蔽性能测试还没有统一的标准，为了研究中子屏蔽测试系统中子响应可靠性和稳定性的影响因素，采用超级蒙特卡罗SuperMC程序模拟中子屏蔽测试系统建模，对探测器远近位置、探测器偏离位置、辐射源偏离位置及测试样品规格等影响因素进行了仿真分析，结合中子探测仪器的中子响应曲线对中子通量、平均能量及中子能谱等仿真数据进行比较和分析，提供了较为合理可靠的测试参数，为减少屏蔽测试系统测试误差提供理论依据。

Abstract

Background

Shielding materials has been widely used in nuclear field

but no uniform standards have been established so far for the neutron shielding performance test of shielding materials.

Purpose

This study aims to analyze the factors affecting the reliability and stability of neutron response in neutron shielding test system.

Method

The SuperMC program was employed to simulate the neutron shielding test system modeling

and the influence factors such as the distance of test sample to the detector

the axis deviation of test sample to the detector

the axis deviation of the radiation source to the detector and the size of test sample. Simulation data of neutron flux

neutron mean energy and neutron energy spectrum were compared and analyzed with the neutron response curve of neutron detection instrument.

Results

Analysis results show that the detector and radiator adjusted to the center line position of the collimation area achieve stable and reliable performance. The distance between the detector and the radiator in the range of 130~180 cm

and sample size greater than 30 cm are recommended.

Conclusion

This paper provides reasonable and reliable test parameters for the neutron shielding test system

and theoretical basis for reducing the test error of the test system and improving reliability of test data.

关键词

Keywords

references

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