Separation of Uranium and Transuranic Elements from Rare Earth Elements by Means of Multistage Extraction in LiCl-KCl/Bi System.

Kinoshita, Kensuke; Inoue, Tadashi; Fusselman, S.P.; Grimmett, D. L.; Roy, J. J.; GAY, R. L.; Krueger, C.; Nabelek, C. R.; Storvick, T. S.

doi:10.3327/jnst.36.189

Cited by 39 publications

(40 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is noted that these values are comparable to those (63-90%) for U electrodeposition on a solid electrode in LiCl-KCl melt. 27 This result indicates that most of the current was exclusively spent for the Gd electrodeposition at these potentials where bulk carbon electrodes lead to a significant extent of Li intercalation reaction. Figure 6(b) shows that the cathodic peak currents and square root of the scan rates for the Gd electrodeposition are in an excellent linear relationship (R 2 = 0.9992).…”

Section: +mentioning

confidence: 79%

“…2, it appeared that the cathodic current of Electrochemistry, 82(6), 462-466 (2014) the graphene electrode started slightly increasing around ¹1.95 V. Therefore, it is supposed that the Gd electrodeposition may take place simultaneously with the Li intercalation reaction. In order to evaluate the influence of the Li intercalation reaction on the Gd electrodeposition reaction, we performed the Gd electrodeposition experiments using chronoamperometry (CA) and measured the current efficiency for the Gd electrodeposition on the graphene electrode by comparing the total charges passed during the Gd electrodeposition 27 and the electrodeposited Gd amount ( Table 1). The total charges were obtained by the integration of the CA results.…”

Section: +mentioning

confidence: 99%

See 1 more Smart Citation

Electrochemical Reactions of Uranium Trichloride on a Graphene Surface in LiCl-KCl Molten Salt

et al. 2014

View full text Add to dashboard Cite

The electrochemcal reactions of uranium trichloride on the surfaces of dimensionally very dissimilar carbon-based materials such as glassy carbon (GC) and graphene in LiCl-KCl eutectic melt were investigated using cyclic voltammetry (CV) and scanning electron microscopy (SEM). The cathodic scanning of CV displayed that the Li intercalation reaction into the GC electrode governs at the potential of approximately −1.45 V vs. Ag|Ag + where the electrodeposition reaction of uranium may occur. On the other hand, the graphene electrode presented electrodeposition current of the uranium without interference at −1.45 V vs. Ag|Ag + because the Li intercalation reaction was extensively diminished on the very thin graphene film. In addition, it was successful to measure the electrodeposition current of gadolinium at more positive than −2.1 V without the interference of the Li intercalation into the graphene substrate. Consequently, the significant reduction of the Li intercalation reaction on the nanometer thick carbon electrode extensively expands the electrochemical potential window of the carbon-based electrode with respect to the bulk carbon electrode in LiCl-KCl melt, emphasizing that the graphene has a great potential as a cathode electrode in high temperature molten salt electrolytes.

show abstract

Section: +mentioning

confidence: 79%

Section: +mentioning

confidence: 99%

Electrochemical Reactions of Uranium Trichloride on a Graphene Surface in LiCl-KCl Molten Salt

et al. 2014

View full text Add to dashboard Cite

show abstract

“…[11][12][13][14] Since the separation of uranium and TRUs from rare-earth elements in simulating chlorination product salt was demonstrated by reductive-extraction method, it was confirmed that the pyropartitioning process can meet the goal. 15,16) To start the engineering-scale examination, there are some concerns that need to be addressed as follows.…”

Section: )mentioning

confidence: 99%

Recovery of Transuranium Elements from Real High-Level Liquid Waste by Pyropartitioning Process

Uozumi

Iizuka

Kurata

et al. 2011

J. Nucl. Sci. Technol.

Self Cite

View full text Add to dashboard Cite

A pyropartitioning process is under development to recover minor actinide elements from high-level liquid waste (HLLW) generated by Purex reprocessing. This pyropartitioning process consists of a denitration step that converts various elements in the HLLW into oxides, a chlorination step that converts the oxides into chlorides, and a reductive-extraction step that separates the actinide elements from fission products (FPs) in the chlorination product. The feasibility of each step was confirmed using simulating FPs and unirradiated transuranium elements (TRUs). In the present study, approximately 520 g of real HLLW was prepared to demonstrate the feasibility of the pyropartitioning process. Almost 100% of each TRU originally contained in the HLLW was recovered in the liquid cadmium phase in the reductive-extraction step, which showed that the expected chemical reactions were completed and the mass loss of TRUs was negligible in the denitration, chlorination, and reductive-extraction steps. The separation behaviors of actinide elements, including americium and curium, from FPs in the reductive-extraction step were quite similar to those observed in previous experiments using unirradiated materials. Hence, the pyropartitioning process was successfully verified.

show abstract

“…For example, researchers at Central Research Institute for Electric Power Industry (CRIEPI) in Japan investigated reactive extraction from LiCl-KCl, using lithium dissolved in liquid cadmium and bismuth [3,4]. Kurata et.…”

Section: Introductionmentioning

confidence: 99%

“…Reactive extraction into molten metals has been previously studied for achieving drawdown [3][4][5][6][7][8]. For example, researchers at Central Research Institute for Electric Power Industry (CRIEPI) in Japan investigated reactive extraction from LiCl-KCl, using lithium dissolved in liquid cadmium and bismuth [3,4].…”

Section: Introductionmentioning

confidence: 99%

SELECTIVE REDUCTION OF ACTIVE METAL CHLORIDES FROM MOLTEN LiCl-KCl USING LITHIUM DRAWDOWN

Simpson

Yoo

LaBrier

et al. 2012

Nuclear Engineering and Technology

View full text Add to dashboard Cite

Separation of Uranium and Transuranic Elements from Rare Earth Elements by Means of Multistage Extraction in LiCl-KCl/Bi System.

Cited by 39 publications

References 4 publications

Electrochemical Reactions of Uranium Trichloride on a Graphene Surface in LiCl-KCl Molten Salt

Electrochemical Reactions of Uranium Trichloride on a Graphene Surface in LiCl-KCl Molten Salt

Recovery of Transuranium Elements from Real High-Level Liquid Waste by Pyropartitioning Process

SELECTIVE REDUCTION OF ACTIVE METAL CHLORIDES FROM MOLTEN LiCl-KCl USING LITHIUM DRAWDOWN

Contact Info

Product

Resources

About