Electrochemical Behavior of CsI in LiCl Molten Salt

Autor: Sung-Wook Kim, Sang-Kwon Lee, Min Ku Jeon, Eun-Young Choi
Jazyk: angličtina
Rok vydání: 2020
Předmět:
Zdroj: Science and Technology of Nuclear Installations, Vol 2020 (2020)
Druh dokumentu: article
ISSN: 1687-6075
1687-6083
DOI: 10.1155/2020/8852351
Popis: The electrochemical behavior of CsI in LiCl molten salt was investigated to identify its impact on the electrolytic oxide reduction of oxide-phase spent nuclear fuels by combined electrolysis and cyclic voltammetry experiments of LiCl-CsI in comparison with LiCl, LiCl-CsCl, and LiCl-LiI. It was found that Cs+ ions were hardly involved in the cathode reaction, and reduction of Li+ ions occurred dominantly in the cathode. In contrast, incorporation of I− ions induced low-potential anode reaction compared with the I− ion-free cases. Such additional electrochemical reaction resulted in the generation of I2 and/or ICl gases, which would increase a process burden for treating 129I with exceptionally long lifetime. In this respect, separating CsI from spent nuclear fuel before the electrolytic oxide reduction is recommended for the purpose of efficient waste management.
Databáze: Directory of Open Access Journals
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