Nuclear Techniques ›› 2019, Vol. 42 ›› Issue (9): 90503-090503.doi: 10.11889/j.0253-3219.2019.hjs.42.090503

• NUCLEAR PHYSICS, INTERDISCIPLINARY RESEARCH • Previous Articles     Next Articles

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

Guangshui ZHANG Long MENG Xianfang CAO Ke QIN Peizhong GUO,Liancai ZENG Xinmiao WANG()   

  1. Beijing Key Laboratory of New Radiation Materials, Beijing Radiation Application Research Center, Beijing 100012, China
  • Received:2019-01-30 Revised:2019-06-14 Online:2019-09-10 Published:2019-09-18
  • Contact: Liancai ZENG Xinmiao WANG E-mail:zhanglong_fang@sina.cn
  • Supported by:
    the Youth Backbone Program of Beijing Academy of Science and Technology(201517)

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.

Key words: Shielding materials, Monte Carlo, Neutron response, Neutron shielding test, SuperMC

CLC Number: 

  • TL81