Study on measurement of relative burn-up for fuel tube

Liuwei KUANG; Huarong LIU; Zhe CHEN

doi:10.11889/j.0253-3219.2018.hjs.41.010603

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Study on measurement of relative burn-up for fuel tube

SYNCHROTRON RADIATION TECHNOLOGY AND APPLICATIONS | 更新时间：2021-05-19

- Study on measurement of relative burn-up for fuel tube
- NUCLEAR TECHNIQUES Vol. 41, Issue 1, Article number: 010603(2018)
- 作者机构：
  
  1.中国核动力研究设计院成都 610041
  2.四川建筑职业技术学院德阳 618000
- 作者简介：
- 基金信息：
  
  Research Project on China's Advanced Nuclear Power Standard System (StageⅡ)
- DOI：10.11889/j.0253-3219.2018.hjs.41.010603
  CLC： TL352
- Received：06 June 2017，
  
  Revised：02 August 2017，
  
  Published：10 January 2018
- 稿件说明：
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Liuwei KUANG, Huarong LIU, Zhe CHEN. Study on measurement of relative burn-up for fuel tube[J]. Nuclear techniques, 2018, 41(1): 010603
DOI：

Liuwei KUANG, Huarong LIU, Zhe CHEN. Study on measurement of relative burn-up for fuel tube[J]. Nuclear techniques, 2018, 41(1): 010603 DOI： 10.11889/j.0253-3219.2018.hjs.41.010603.

摘要

为了准确测量燃料管燃耗和验证燃料管运行的正确性，保证反应堆安全运行、提高燃料的利用率和经济性，针对大直径燃料管相对燃耗测量存在的问题，根据燃料管结构设计了燃料管γ扫描测量系统。首先，用已知活度的10 mm

137

Cs标准点源验证了装置的可靠性和方法的可行性。然后，选取了同一燃料组件3种不同直径燃料管进行γ扫描，分别测量了燃料管径向和轴向相对燃耗分布，根据径向相对燃耗分布确定了燃料管阴阳面。最后，在燃料管阳面最大燃耗处进行燃料管轴向γ扫描，获得燃料管轴向相对燃耗分布，并对比各层燃料管相对燃耗大小。通过本方法确定的燃料管相对燃耗测量相对误差小于4%，实现了燃料管相对燃耗的精确测量，为其它类型燃料元件相对燃耗测量提供了一种新思维。

Abstract

Background

Fuel availability and economical efficiency are very important for nuclear reactor

measuring the relative burn-up of large-diameter fuel tubes is a challenge issue in nuclear engineering.

Purpose

This study aims to design a γ scanning system of fuel tubes based on the fuel tubes' structure to exactly measure the relative burn-up and verify the operating correctness of fuel tubes.

Methods

First of all

the reliability of the device and feasibility of the method was verified through a 10-mm standard

137

Cs point source. Then the γ scanning was carried out for three different diameter fuel tubes of the same fuel assembly to measure the relative burn-up distribution of fuel tubes separately in the radial and axial directions. The positive and cathode faces of fuel tubes were confirmed according to the relative burn-up distribution in the radial direction. Finally

the relative burn-up of fuel tubes in different layers was determined by γ scanning the fuel tube in the axial direction at the positive face with maximum burn-up.

Results

The measuring technique of relative burn-up of fuel tubes was realized with less than 4% relative error.

Conclusion

Measuring technique of relative burn-up of fuel tubes was established by proposed approach

it provides a new way for the relative burn-up measurement of other fuel assembly.

关键词

Keywords

references

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