X-ray absorption multi-edge analysis method for simultaneous determination of U and Pu concentrations in solution

XIONG Chaojie; KANG Haiying; ZHENG Weiming; ZHU Haiqiao; WU Yulong; ZUO Chen

doi:10.3724/j.0253-3219.2026.hjs.49.250330

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X-ray absorption multi-edge analysis method for simultaneous determination of U and Pu concentrations in solution

NUCLEAR CHEMISTRY, RADIOCHEMISTRY, RADIOPHARMACEUTICALS AND NUCLEAR MEDICINE | 更新时间：2026-02-13

- X-ray absorption multi-edge analysis method for simultaneous determination of U and Pu concentrations in solution
- NUCLEAR TECHNIQUES Vol. 49, Issue 2, Article number: 020302(2026)
- 作者机构：
  
  中国原子能科学研究院北京 102413
- 作者简介：
  
  XIONG Chaojie, male, born in 1993, graduated from China Institute of Atomic Energy with a master's degree in 2018, focusing on analytical chemistry
  KANG Haiying, E-mail: kanghaiying@cnncmail.cn
- 基金信息：
  
  China National Nuclear Corporation Centralized R&D Projects
- DOI：10.3724/j.0253-3219.2026.hjs.49.250330
  CLC： TL27
- Received：30 August 2025，
  
  Revised：2025-10-30，
  
  Published：15 February 2026
- 稿件说明：
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熊超杰,康海英,郑维明等.多边界X射线吸收光谱法同时测定溶液中铀、钚含量的分析方法[J].核技术,2026,49(02):020302.

XIONG Chaojie,KANG Haiying,ZHENG Weiming,et al.X-ray absorption multi-edge analysis method for simultaneous determination of U and Pu concentrations in solution[J].NUCLEAR TECHNIQUES,2026,49(02):020302.
熊超杰,康海英,郑维明等.多边界X射线吸收光谱法同时测定溶液中铀、钚含量的分析方法[J].核技术,2026,49(02):020302. DOI： 10.3724/j.0253-3219.2026.hjs.49.250330. CSTR： 32193.14.hjs.CN31-1342/TL.2026.49.250330.

XIONG Chaojie,KANG Haiying,ZHENG Weiming,et al.X-ray absorption multi-edge analysis method for simultaneous determination of U and Pu concentrations in solution[J].NUCLEAR TECHNIQUES,2026,49(02):020302. DOI： 10.3724/j.0253-3219.2026.hjs.49.250330. CSTR： 32193.14.hjs.CN31-1342/TL.2026.49.250330.

摘要

针对快堆乏燃料后处理样品中铀、钚含量的测量，采用自研的多边界X射线吸收光谱法，建立了铀、钚浓度同时测

量的非破坏性分析方法。通过分别利用铀、钚的K吸收边和L吸收边，建立标准化的光谱数据处理流程和多元线性拟合的定量分析模型，实现了多边界铀、钚含量定量分析方法。分析结果表明，样品中铀浓度在20~100 g∙L

-1

范围内、钚浓度在10~40 g∙L

-1

范围内时，铀、钚浓度定量分析结果的相对误差均在5%以内，铀的相对标准偏差在2.5%以内，钚的相对标准偏差可以达到3.4%以内。本文实现的K边界和L边界的多边界定量分析方法准确度良好、精密度高，均能够准确测量高浓度铀、钚样品中铀、钚含量，可用于实际样品的定量分析。

Abstract

Background

Determination of uranium and plutonium in fast reactor spent fuel reprocessing is vital for the quality control of process and products.

Purpose

This study aims to establish a non-destructive analytical method for simultaneous determination of uranium and plutonium.

Methods

The X-ray absorption spectrum method based on K-edge and L-edge of U and Pu was applied to developing the determination method of uranium and plutonium content. After obtaining the spectra of standard mixture solutions of U and Pu samples

a standard data process for mathematical model based on multivariate linear fitting method was established to simultaneously measure the concentration of uranium and plutonium in solution. Finally

measurements were conducted on samples with different concentrations to evaluate the stability and accuracy of the quantitative analysis method.

Results

Measurement result shows that the relative deviation of measurement results is within 5% within the concentration range of 20 g∙L

-1

to 100 g∙L

-1

for uranium and 10 g∙L

-1

to 40 g∙L

-1

for plutonium. The precision of uranium is better than 2.5% and the precision of plutonium was better than 3.4%.

Conclusions

The established method can be used for the quantitative analysis of uranium and plutonium with good measurement accuracy and repeatability

hence be used in practical application.

关键词

Keywords

references

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