Laser-induced breakdown spectroscopy for contamination analysis of Sr and Cs on 316L stainless steels in alkaline environment for spent nuclear fuel storage

被引：11

作者：

Xie, Yupeng ^{[1
]}

Wang, Jie ^{[1
]}

Hu, Yaocheng ^{[1
]}

Zhang, Jing ^{[1
]}

Gao, Yong ^{[1
]}

Li, Haipeng ^{[1
]}

Wang, Sheng ^{[1
]}

机构：

[1] Xi An Jiao Tong Univ, Shaanxi Engn Res Ctr Adv Nucl Energy, Sch Nucl Sci & Technol, Sch Energy & Power Engn,Shaanxi Key Lab Adv Nucl, Xian 710049, Shaanxi, Peoples R China

来源：

APPLIED SURFACE SCIENCE | 2021年 / 566卷

基金：

中国国家自然科学基金;

关键词：

Laser-induced breakdown spectroscopy; Contamination; Strontium; Cesium; 316L stainless steel; X-RAY PHOTOELECTRON; CORROSION BEHAVIOR; STRONTIUM; URANIUM; SPECTRA; DECONTAMINATION; SURFACES; CESIUM; IONS; XPS;

D O I：

10.1016/j.apsusc.2021.150709

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The contamination of fission products (Sr-90 and Cs-137) on the metallic material (316L stainless steel) of alkaline spent fuel storage pond threatens to decommission nuclear facilities. Compared with previous studies unable to detect Cs on the surface of contaminated steel by laser-induced breakdown spectroscopy (LIBS), this study selected the emission lines of Sr II 407.74 nm and Cs I 455.77 nm as the analytical spectral lines of LIBS, and for the first time satisfactorily measured and analyzed the accumulation of Sr and Cs on the surface of 316L stainless steel for 7, 14, 21, 30 and 60 days, respectively. It was found during the accumulation, the concentration of Sr and Cs on the surface reached their maximum after 21 days, and relatively stabilized 30 days later. In addition, combined with the physicochemical characterizations, the contamination mechanism of Sr and Cs on 316L stainless steel was proposed, with the contaminants gradually diffusing from the oxide layer dissolved and damaged in the alkaline corrosive environment to the matrix. Strontium had two forms on the steel surface: SrCrO4 in the oxide layer and SrCO3 in the matrix, but the contamination of Cs was more inclined to the surface than Sr.

引用

页数：13

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