Electrochemical Activity Measurements of UCl3 in Molten NaCl-MgCl2-UCl3

被引：0

作者：

Yankey, Jacob ^{[1
]}

Monreal, Marisa ^{[2
]}

Jackson, Matt ^{[2
]}

Simpson, Michael ^{[1
]}

机构：

[1] Univ Utah, Mat Sci & Engn Dept, 122 S Cent Campus Dr 304, Salt Lake City, UT 84112 USA

[2] Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA

来源：

JOURNAL OF NUCLEAR ENGINEERING AND RADIATION SCIENCE | 2024年 / 10卷 / 03期

关键词：

high-temperature electrochemistry; molten salt chemistry; MSR; reactor fuel candidate; chloride salt activity;

D O I：

10.1115/1.4064598

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

Open circuit potential (OCP) measurements were made to determine uranium chloride (UClx) species activity in NaCl-MgCl2, which is a candidate salt for use in a molten salt reactor fuel. The operating temperature ranged from 500 to 650( degrees)C, and the measurement system used a U-Zr working electrode (WE) and Ag/AgCl reference electrode (RE). The activity was calculated to range from 2.52x10(-6) to 2.99x10(-8) (with uncertainties of +/- 1.0x10(-7) and +/- 1.1x10(-9), respectively), dependent upon the temperature and concentration of UCl3 (ranging from 0.25 to 11.55 wt.%). Fit of the OCP data to the Nernst equation resulted in values of 3.1 to 4.8 electrons transferred per U atom. This indicates the possibility for codeposition of Mg2+ and U3+ under certain conditions. Scanning electron microscopy, energy-dispersive X-ray spectroscopy, and X-ray photo-electron spectroscopy analyses of cathodic deposits confirm the presence of metallic magnesium.

引用

页数：8

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