Laser-induced breakdown spectrometry for product monitoring of spent nuclear fuel reprocessing

IF 0.3 4区 工程技术 Q4 NUCLEAR SCIENCE & TECHNOLOGY
A. A. Zherebtsov, Yu. S. Mochalov, M. A. Tarazanova, A. N. Rybakov, K. N. Dvoeglazov, E. A. Shirshin, G. S. Budylin, V. A. Petrov
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引用次数: 0

Abstract

Background

Process monitoring for the composition of spent nuclear fuel (SNF) is closely related to the risks of radiation exposure to personnel and formation of secondary radioactive waste. In addition, it requires labor-intensive sample preparation, as well as costly, long-term, and numerous measurements, making the transition to remote measurement methods, such as laser-induced breakdown spectrometry (LIBS), extremely important.

Aim

To determine the possibility of introducing the LIBS method into the system for chemical composition monitoring of hydrometallurgical reprocessing of SNF from the BREST-OD-300 reactor plant for an alternative replacement of existing physical and chemical methods including atomic emission spectrometry, spectrophotometry, and X-ray fluorescence analysis for measuring the content of U, Pu, and rare earth elements (REE).

Materials and methods

A review of literature sources was conducted. A model of the experimental laboratory LIBS unit was developed; test measurements of the element composition were made using the spectral characteristics of solid and liquid samples simulating oxidized SNF.

Results

The performed literature review showed the potential of using LIBS. The developed LIBS unit was effectively used to determine actinide atomic emission lines using U as an example and identify the presence of nuclear fuel fission products. The measurement error for the concentration of La, Nd, Ce, Fe was 10, 12, 4.5, and 13.5%, respectively, in solid samples of REE oxides with a concentration from 103 to 105 ppm. For Zr, the error is 3.3% in the samples of nitric acid solutions with a concentration of 0.9–15 g/dm3. Economic efficiency of using the LIBS method involves the reduction in the daily number of measurements and equipment costs by ~29 and 40%, respectively, at the duration of measurements decreased to 24 h.

Conclusion

The experimental results confirm the operability of the developed LIBS unit and possibility of determining uranium, plutonium, and REE, as well as measuring their content. Due to reduced risks of personnel exposure, the LIBS method can be used to replace a number of quantitative chemical analysis methods for conducting remote online radiation monitoring and decelerating the formation of secondary radioactive waste. In the future, the work on reducing detection limits and measurement errors is required.

乏核燃料后处理产物监测的激光诱导击穿光谱法
背景:乏核燃料成分的过程监测与人员暴露于辐射的风险和二次放射性废物的形成密切相关。此外,它需要劳动密集型的样品制备,以及昂贵、长期和大量的测量,因此过渡到远程测量方法,如激光诱导击穿光谱法(LIBS),非常重要。目的确定将LIBS方法引入BREST-OD-300反应器装置湿法冶金后处理SNF化学成分监测系统的可能性,以替代现有的物理和化学方法,包括原子发射光谱法、分光光度法和x射线荧光分析,用于测量U、Pu和稀土元素(REE)的含量。材料与方法对文献资料进行综述。建立了实验实验室LIBS单元的模型;利用模拟氧化SNF的固体和液体样品的光谱特征对元素组成进行了测试测量。结果通过文献综述,显示了LIBS的应用潜力。研制的LIBS装置有效地用于以铀为例的锕系元素原子发射谱线的测定和核燃料裂变产物的存在。在稀土氧化物浓度为103 ~ 105 ppm的固体样品中,La、Nd、Ce、Fe的测量误差分别为10、12、4.5和13.5%。对于Zr,在浓度为0.9-15 g/dm3的硝酸溶液样品中,误差为3.3%。使用LIBS方法的经济效益包括每日测量次数和设备成本分别减少29%和40%,在测量持续时间减少到24 h。结论实验结果证实了所研制的LIBS装置的可操作性和测定铀、钚和稀土元素及其含量的可能性。由于降低了人员暴露的风险,LIBS方法可以代替多种定量化学分析方法进行远程在线辐射监测,减缓二次放射性废物的形成。在未来,需要在降低检测限和测量误差方面进行工作。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Atomic Energy
Atomic Energy 工程技术-核科学技术
CiteScore
1.00
自引率
20.00%
发文量
100
审稿时长
4-8 weeks
期刊介绍: Atomic Energy publishes papers and review articles dealing with the latest developments in the peaceful uses of atomic energy. Topics include nuclear chemistry and physics, plasma physics, accelerator characteristics, reactor economics and engineering, applications of isotopes, and radiation monitoring and safety.
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