High-temperature distillation and consolidation of U–Zr cathode product from molten salt electrorefining of simulated metallic fuel

Iizuka, Masatoshi; Akagi, Masaaki; Koyama, Tadafumi

doi:10.1016/j.jnucmat.2014.02.015

Cited by 8 publications

(3 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These studies indicate that yttria is a promising coating material for uranium melting [6,19,20,21] application in the injection casting system. However, yttria coating was reported to be unsuitable for cathode processor application as yttria reacted with UCl 3 present in the salt [22]. For cathode processor application, ceramic-lined crucibles [3] or preferably zirconia wash coat appears to be suitable in inhibiting the reaction as well as facilitating easy release of ingot after distillation [22].…”

Section: Resultsmentioning

confidence: 99%

Evaluation of nanocrystalline hafnium nitride coating exposed to molten uranium

Shankar

Chawla

Venkatesh

et al. 2018

Surface Engineering

View full text Add to dashboard Cite

Transition metal nitride films have a unique combination of properties and finds application as protective coatings. The present paper deals with the degradation behaviour of HfN coating deposited by reactive magnetron sputtering on high-density (HD) graphite and niobium (Nb) crucibles with molten uranium. Uranium melting experiments were carried out with uranium shots placed in HfN-coated crucibles and heated to 1573 K under ultra high purity argon gas for 25 min. The study showed delamination of HfN coating deposited on Nb and HD graphite crucibles. The degradation of HfN-coated niobium was attributed to partial melting and surface oxidation. Uranium melting of HfN-coated HD graphite crucible led to coating spallation that could be attributed to thermal expansion mismatch and also resulted in the formation of uranium-carbon mixture of unusual morphology. The paper highlights the results of the present investigation.

show abstract

Section: Resultsmentioning

confidence: 99%

Evaluation of nanocrystalline hafnium nitride coating exposed to molten uranium

Shankar

Chawla

Venkatesh

et al. 2018

Surface Engineering

View full text Add to dashboard Cite

show abstract

“…lnγ La(III),melt [6] Based on the Equations 4 and 6, the apparent standard potential of La(III)/La can be calculated once the equilibrium potential of La(III)/La is given. The equilibrium potential can be determined by the open circuit potential technique and galvanodynamic measurements.…”

Section: Electrochemical Behavior Of La(iii) On Liquid Galliummentioning

confidence: 99%

“…Currently, molten salt based pyrochemical reprocessing of spent nuclear fuels has been regarded to be a potential option compared to the traditional hydrometallurgical reprocessing method which may produce many secondary wastes. [3][4][5][6] Basically, the separation of An over Ln can be achieved through high temperature reductive extraction and/or electrorefining 7 in molten salt. However, the challenge stemming from the chemical similarities of trivalent An and Ln is the high efficient separation of MA.…”

mentioning

confidence: 99%

Electrochemical Properties of Lanthanum on the Liquid Gallium Electrode in LiCl-KCl Eutectic

Pang¹,

Liu²,

Nie³

et al. 2016

J. Electrochem. Soc.

View full text Add to dashboard Cite

This work presents an electrochemical study of La(III) in the LiCl-KCl-LaCl 3 melt on a liquid gallium electrode. The reduction of the La(III) on a liquid gallium starts at −1.13 V (vs. Ag/AgCl) and is a one step process with three electrons transferred. The activities, activity coefficients and solubilities of La in La-Ga alloys were calculated by open circuit potential technique at the temperature range of 673 to 823 K. Moreover, galvanodynamic methods was also applied on a W electrode to evaluate the apparent standard potential of La(III)/La couple, the Gibbs free energy for the formation of LaCl 3 and the activity coefficient of La(III) in the LiCl-KCl-LaCl 3 melt. The co-reductive cyclic voltammograms of La(III) and Ga(III) present several redox couples which correspond to the formation and dissolution of different La-Ga intermetallic compounds. Finally, potentiostatic electrolysis was employed to deposit La on a liquid Ga electrode and the intermetallic compound LaGa 6 was identified by Scanning Electron Microscopy coupled with Energy Dispersive Spectroscopy (SEM-EDS) and X-ray diffraction (XRD) characterizations.

show abstract