Determination of primary metal elements in LiF-UF4 and LiF-ThF4 molten salts via inductively coupled plasma atomic emission spectrometry

被引：0

作者：

Han L. ^{[1
,2
]}

Tang Y. ^{[1
]}

Ge M. ^{[1
]}

Qian Y. ^{[1
]}

Liu H. ^{[1
]}

机构：

[1] Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai

[2] University of Chinese Academy of Sciences, Beijing

来源：

He Jishu/Nuclear Techniques | 2024年 / 47卷 / 03期

基金：

中国国家自然科学基金;

关键词：

ICP-AES; LiF-ThF[!sub]4[!/sub; LiF-UF[!sub]4[!/sub; Lithium; Thorium; Uranium;

D O I：

10.11889/j.0253-3219.2024.hjs.47.030603

中图分类号：

学科分类号：

摘要：

[Background] LiF-UF4 and LiF-ThF4 are used as addition salts in thorium-based molten salt nuclear reactors. Monitoring the product quality during the preparation of molten salts necessitates the analysis of the contents of the main metal elements in LiF-UF4 and LiF-ThF4, namely, lithium, uranium, and thorium. [Purpose] This study aims to establish effective, rapid analysis methods for determination of primary metal elements in LiF-UF4 and LiF-ThF4 molten salts. [Methods] Firstly, the LiF-UF4 samples were treated with nitric acid and hydrogen peroxide whilst the LiF-ThF4 samples were dissolved in aluminum nitrate. Then, inductively coupled plasma atomic emission spectrometry was used as rapid analysis methods for measuring these two molten salts, and manganese was employed as the internal standard element to reduce the effect of signal drift. [Results] In the analytical method of LiF-UF4, the recoveries of Li and U are detected to be 99.6%~102.4% and 99.6%~101.8%, respectively. The relative standard deviations (RSDs) of Li and U are 0.2%~0.7%, and 1.1%~2.0%, respectively. In the analytical method of LiF-ThF4, the recoveries of Li and Th are detected to be 99.6%~102.3% and 99.6%~102.4%, respectively. The relative standard deviations of Li and Th are 1.9%~2.0%, and 0.3%~0.4%, respectively. [Conclusions] The proposed methods are simple, time-efficient, accurate, and suitable for rapid analyses of large numbers of samples. © 2024 Science Press. All rights reserved.

引用

共 16 条

[1] Serp J, Allibert M, Benes O, Et al., The molten salt reactor (MSR) in generation IV: overview and perspectives[J], Progress in Nuclear Energy, 77, pp. 308-319, (2014)
[2] JIANG Mianheng, XU Hongjie, DAI Zhimin, Advanced fission energy program-TMSR nuclear energy system, Symposium on 20 Years of Sustainable Development, pp. 366-374, (2012)
[3] Determination of uranium in uranium dioxide powder and pellets-Ferrous sulfate reduction-potassium dichromate oxidation titrimatric method: GB/T 11841—1989, (1989)
[4] Determination of thorium in thorium ores: GB/T 17863—2008, (2009)
[5] Methods for chemical analysis of lithium carbonate, lithium hydroxide monohydrate and lithium chloride—Part 1: Determination of lithium carbonate content—Acid-alkali titrimetric method: GB/T 11064.1—2013, (2014)
[6] Sengupta A, Thulasidas S K, Natarajan V., Trace level determination of precious metals in aqueous medium, U, Th and Zr based nuclear materials by ICP-AES and EDXRF: a comparative study[J], Journal of Radioanalytical and Nuclear Chemistry, 303, 3, pp. 2421-2429, (2015)
[7] Argekar A A, Kulkarni M J, Mathur J N, Et al., Chemical separation and ICP-AES determination of 22 metallic elements in U and Pu matrices using cyanex-923 extractant and studies on stripping of U and Pu[J], Talanta, 56, 4, pp. 591-601, (2002)
[8] FANG Qiying, HUANG Zongzhi, ZHOU Hongdi, The determination of trace amounts of rare earth elements in nuclear pure thorium dioxide by ultrasonic nebulizing ICP spectrometry[J], Nuclear Techniques, 8, 3, pp. 57-58, (1985)
[9] Winchester M R, Turk G C, Butler T A, Et al., Certification of beryllium mass fraction in SRM 1877 Beryllium Oxide Powder using high-performance inductively coupled plasma optical emission spectrometry with exact matching[J], Analytical Chemistry, 81, 6, pp. 2208-2217, (2009)
[10] Salit M L, Vocke R D, Kelly W R., An ICP-OES method with 0.2% expanded uncertainties for the characterization of LiA1O<sub>2</sub>[J], Analytical Chemistry, 72, 15, pp. 3504-3511, (2000)

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