Approach to on-line monitoring of PUREX process using chemometric processing of the optical spectral data
Approach to on-line monitoring of PUREX process using chemometric processing of the optical spectral data
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使用光谱数据的化学计量处理在线监测 PUREX 过程的方法
DOI：
10.1524/ract.2013.2009
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
A. Legin
中科院分区：
文献类型：
--
作者：
D. Kirsanov;V. Babain;M. Agafonova;A. Lumpov;A. Legin
在乏核燃料后处理PUREX工艺的水相和有机相模型溶液中进行了紫外-可见和红外光谱测量。利用PLS（偏最小二乘）回归对光谱数据进行化学计量学处理，可以以有效和优雅的方式同时定量这些混合物中的几种关键成分（铀、镎、钚、硝酸）。定量测定各关键成分含量，平均相对误差不超过10%。结果表明，与使用普通最小二乘方法中的单个波长相比，使用整个光谱或其某些连续区域进行PLS校准可以减少分析误差。研究结果表明，基于光谱学方法与多元数据处理技术相结合的SNF后处理在线监测技术的发展是完全可能的。
Abstract Optical spectroscopic measurements in the UV-Vis and IR ranges were performed in model solutions of aqueous and organic phases of the PUREX process for spent nuclear fuel (SNF) reprocessing. Chemometric processing of the spectral data with PLS (partial least squares) regression allowed simultaneous quantification of several key components (uranium, neptunium, plutonium, nitric acid) in these mixtures in an effective and elegant way. The content of all key components was quantitively determined with mean relative errors not exceeding 10%. It was shown that the employment of the whole spectra or their certain continuous regions for a PLS calibration enables to decrease the analytical errors compared to the use of a single wavelength in an ordinary least squares approach. The results of this research imply that the development of on-line techniques for SNF reprocessing monitoring is fully possible and can be based on optical spectroscopy methods combined with multivariate data processing techniques.