Electrolytic production of metallic uranium from U3O8 in a 20-kg batch scale reactor&lt;/p&gt; &lt;/p&gt;

Jeong, Sang‐Mun; Park, S.-B.; Hong, Sun-Seok; Seo, Changwon; Park, S.-W.

doi:10.1556/jrnc.268.2006.2.24

Cited by 9 publications

(12 citation statements)

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“…[26] The production of significant quantities (~20 kg) of uranium metal has been achieved by the electroreduction process. [25] The electroreduction of mixed uranium and plutonium oxide [27] as well as oxide-spent nuclear fuel [28,29] has also been reported recently. Platinum is used as anode in these cells and, hence, oxygen gas is released at the anode.…”

Section: Introductionmentioning

confidence: 93%

“…The process was demonstrated for the production of many metals/semimetals, such as titanium, [9,12] chromium, [13,14] niobium, [15][16][17][18] and silicon. [19][20][21][22] An identical electroreduction process, but with molten lithium chloride containing 1 to 3 wt pct Li 2 O as the electrolyte (650°C) medium, has been studied for the reduction of uranium oxides by researchers at the atomic energy institutes in the United States, [23,24] South Korea, [25] and Japan. [26] The production of significant quantities (~20 kg) of uranium metal has been achieved by the electroreduction process.…”

Section: Introductionmentioning

confidence: 99%

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Electrochemical Deoxidation of Solid Zirconium Dioxide in Molten Calcium Chloride

Mohandas

Fray

2009

Metall Mater Trans B

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The reduction of zirconium dioxide pellets by electro-deoxidation in molten calcium chloridecalcium oxide (900°C) has been studied. In this technique, the solid oxide is cathodically polarized against a graphite counter electrode under a constant applied potential. Unlike other metal oxides that have been reduced by this technique, only a small area around the cathodic current-collector wire was reduced to zirconium metal with zirconia pellets sintered at~1100°C; the rest of the sample was largely calcium zirconate. Pellets sintered above 1200°C showed better reduction near the cathode wire and the reduction extended to the entire surface of the pellet with the passage of time. However, reduction of the inner core was found to be increasingly difficult, because the surface metal layer thickened on continuous electrodeoxidation. An analysis of the experimental results showed that the poor electrical conductivity of the intermediate compound, CaZrO 3 and its blocky morphology inhibited the electrodeoxidation process. The increase in the sintering temperature of the pellet made it better conducting. However, the pores formed in the thick zirconium metal layer in such samples were too small for an ideal contact between the inner core and the molten electrolyte and hence the reduction of the inner core remained incomplete. Within the scope of this study, it is concluded that preforms with good grain growth and porosity are necessary for the electro-deoxidation of solid zirconium oxide.

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Section: Introductionmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Electrochemical Deoxidation of Solid Zirconium Dioxide in Molten Calcium Chloride

Mohandas

Fray

2009

Metall Mater Trans B

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“…The use of powder electrodes is also interesting as the additional steps required for preparation of the compacted pellet electrode can be avoided. Jeong et al [21] has reported reduction of U 3 O 8 powders contained in a porous magnesia crucible to uranium metal. Nagesh [22] reported electro-reduction of sintered TiO 2 granules in kilogram scale.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical reduction of TiO2 powders in molten calcium chloride

Vishnu

Sanil

Shakila

et al. 2015

Electrochimica Acta

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“…An advanced SF conditioning process (ACP) has been developed to treat LWR SFs at the Korea Atomic Energy Research Institute (KAERI) and an electrolytic reduction process (Hur et al, 2003;Seo et al, 2006;Jeong et al, 2006a;Park et al, 2006) was adopted to transform an oxide SF into a metallic form in a LiCl--Li 2 O molten salt. The electrolytic reduction process of the ACP was developed according to a reduction mechanism similar to that of the ED method.…”

Section: Introductionmentioning

confidence: 99%