Neutron shielding property test with combination detection method based on moderation sphere detectors

Xianfang MENG; Guangshui GUO; Long ZHANG; Peizhong QIN; Chao SUN; Huiling MA; Xinmiao ZENG; Liancai WANG

doi:10.11889/j.0253-3219.2016.hjs.39.050201

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Neutron shielding property test with combination detection method based on moderation sphere detectors

更新时间：2021-05-25

- Neutron shielding property test with combination detection method based on moderation sphere detectors
- NUCLEAR TECHNIQUES Vol. 39, Issue 5, Article number: 050201(2016)
- 作者机构：
  
  北京市射线应用研究中心辐射新材料北京市重点实验室北京 100015
  Beijing Research Center for Radiation Applications, Beijing Radiation Materials Key Laboratory, Beijing 100015, China
- 作者简介：
- 基金信息：
- DOI：10.11889/j.0253-3219.2016.hjs.39.050201
  CLC： TL816.3
- Received：15 January 2016，
  
  Accepted：2016-03-17，
  
  Published：25 January 2016
- 稿件说明：
移动端阅览
Xianfang MENG, Guangshui GUO, Long ZHANG, et al. Neutron shielding property test with combination detection method based on moderation sphere detectors[J]. Nuclear techniques, 2016, 39(5): 050201
DOI：

Xianfang MENG, Guangshui GUO, Long ZHANG, et al. Neutron shielding property test with combination detection method based on moderation sphere detectors[J]. Nuclear techniques, 2016, 39(5): 050201 DOI： 10.11889/j.0253-3219.2016.hjs.39.050201.

摘要

随着核技术在各领域的应用推广

中子屏蔽材料得到越来越广泛的应用

而目前国内外还没有测试中子屏蔽性能的统一标准。为了探索一种简单可行、能够在较宽中子能量范围内测试材料屏蔽性能的方法

本文对

H正比计数管、计数管外包镉及计数管外包不同直径的聚乙烯(Polyethylene

PE)慢化球共12个模型进行了MCNP(Monte Carlo N Particle Transport Code)模拟计算

得到一种慢化球探测器组合测试方法

使测试能够在1×10

-5

-1.25MeV能量范围内有较一致的响应。利用这种方法测试了2cm和4cm厚PE对

252

Cf中子的透射率

与多球谱仪解谱法得到的结果在±1.0%内相吻合

对几种材料的测试结果也符合不同类型材料对中子的屏蔽规律

证实了这种简易组合测试方法的可行性。

Abstract

Background:

With the development of nuclear technique

neutron shielding materials have been used widely in many fields. Up to now

there is still no standard test method for neutron shielding property both at home and abroad.

Purpose:

This study aims to find an easy and feasible way to test the shielding effectiveness of materials in a wide range of neutron energy.

Methods:

Models for

H proportional counter cooperating together with polyethylene(PE) moderating spheres of different diameters were calculated using MCNP(Monte Carlo N Particle Transport Code) and the neutron transmittance of some materials was tested.

Results:

The combination detection method by using moderating sphere detectors has consistent response in a wide range of neutron energy from 1×10

-5

MeV to 1.25MeV. The article tested the neutron transmittance of 2cm-and 4cm-thick PE plates for

252

Cf neutrons. The results coincide with multi-sphere spectrometer within ±1.0% and the ordinary shielding rules of differen

t type materials for neutrons.

Conclusion:

The method is validated to be feasible and simple to neutron shielding.

关键词

Keywords

references

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