铀离心浓缩厂铀丰度在线监测仪本底自动测量方法研究

梁庆雷; 邢博; 应斌; 李井怀; 吕学升; 刘国荣

doi:10.11889/j.0253-3219.2016.hjs.39.080502

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铀离心浓缩厂铀丰度在线监测仪本底自动测量方法研究

核物理、交叉学科研究 | 更新时间：2021-05-24

- 铀离心浓缩厂铀丰度在线监测仪本底自动测量方法研究
- Study on the background automatic measurement method of uranium enrichment of on-line monitor at uranium enrichment plant
- 核技术 2016年39卷第8期文章编号：080502
- 作者机构：
  
  1.中国原子能科学研究院北京 102413
  2.中核兰州铀浓缩有限公司兰州 730030
- 作者简介：
  
  [ "梁庆雷, 男, 1981年出生, 2009年于中国原子能科学研究院获硕士学位, 研究领域为核保障", "LIANG Qinglei, male, born in 1981, graduated from China Institute of Atomic Energy with a master's degree in 2009, focusing on nuclear safeguards" ]
  刘国荣, E-mail:liugr@ciae.ac.cn LIU Guorong, E-mail: liugr@ciae.ac.cn
- 基金信息：
- DOI：10.11889/j.0253-3219.2016.hjs.39.080502
  中图分类号： TL99
- 收稿日期：2016-04-27，
  
  修回日期：2016-06-06，
  
  纸质出版日期：2016-08
- 稿件说明：
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梁庆雷, 邢博, 应斌, 等. 铀离心浓缩厂铀丰度在线监测仪本底自动测量方法研究[J]. 核技术, 2016,39(8):080502

Qinglei LIANG, Bo XING, Bin YING, et al. Study on the background automatic measurement method of uranium enrichment of on-line monitor at uranium enrichment plant[J]. Nuclear techniques, 2016, 39(8): 080502
梁庆雷, 邢博, 应斌, 等. 铀离心浓缩厂铀丰度在线监测仪本底自动测量方法研究[J]. 核技术, 2016,39(8):080502 DOI： 10.11889/j.0253-3219.2016.hjs.39.080502.

Qinglei LIANG, Bo XING, Bin YING, et al. Study on the background automatic measurement method of uranium enrichment of on-line monitor at uranium enrichment plant[J]. Nuclear techniques, 2016, 39(8): 080502 DOI： 10.11889/j.0253-3219.2016.hjs.39.080502.

摘要

铀丰度在线监测仪是对铀浓缩厂工艺管道中UF

气体

235

U丰度进行在线监测的装置，本底是其核心关键技术指标，直接关系到丰度值的测量精度。原有本底测量方法需监测仪停止工作，人工将容器内的气体抽空进行测量。而本底自动测量方法通过改变测量容器内UF

气体的压力，用NaI（TI）探测器测量容器内UF

气体中

235

U发射的特征γ射线，利用压力传感器测量容器内UF

气体的压力值，最后对不同压力下的数据进行拟合获得监测仪的本底。实验结果表明，采用本底自动测量方法，监测仪铀丰度在线监测结果的相对标准偏差小于0.30%，与气体质谱计测量结果的最大相对偏差小于0.25%，表明该方法测量本底的准确度高；监测仪本底测量由软件自动完成，提高了监测仪的自动化程度，增强了监测仪的适用性。

Abstract

Background:

Uranium enrichment of on-line monitor (UEOM) is an equipment which is adopted to measure enrichment of UF

flowing through the processing pipes at uranium enrichment plant. Background is the key parameter which directly influences the measurement precision. Traditional background measurement methods need to stop work of monitor and vacuum container.

Purpose:

This study aims to build up a method to measure the background of monitor automatically.

Methods:

A NaI(T1) detector is used to measure the count rates ofγ-ray emitted from

235

U and a pressure sensor is used to measure the pressure of gases in the container

the background of monitor is obtained by fitting the data of different pressures.

Results:

The experimental results show that the relative standard de

via

tion is less than 0.30% and the maximum de

via

tion is less than 0.25% comparing with the data from mass spectrometry method.

Conclusion:

The new method shows a better precision compared with the traditional and it increases automation of the monitor greatly.

关键词

Keywords

references

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吕学升 , 刘国荣 , 金惠民 , . 铀浓缩厂铀丰度在线监测装置研制 . 原子能科学技术 , 2013 . 47 ( 6 ): 1060 - 1061 . DOI: 10.7538/yzk.2013.4706.1060 http://doi.org/10.7538/yzk.2013.4706.1060 .

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