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Article
Liquefaction of Latex Glove Waste for Volume Reduction
The accumulation of dry active wastes such as latex gloves in nuclear facilities has become a serious issue because of the high cost and limited storage area for their management. In this study, the liquefacti...
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Article
Investigation of the chlorination behavior of Li(Ni0.6Co0.2Mn0.2)O2 for recycling
The chlorination behavior of Li(Ni0.6Co0.2Mn0.2)O2 (NCM(622)), a cathode material for Li-ion batteries, was investigated. Chlorination experiments were conducted in the temperature range of 400–600 ℃ for 1, 2, 4,...
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Article
Recycling of LiMO2 cathode materials by a chlorination-based Li extraction technique
The recycling of Li(Ni1/3Co1/3Mn1/3)O2 (NCM) and LiCoO2 (LCO), which are cathode materials for Li-ion batteries, was demonstrated via a chlorination-based Li extraction technique. The recycling process follows a ...
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Article
A study on solidification of CaCO3 powder containing C-14 by using a low melting glass material
CaCO3 powder containing C-14, which has a long half-life, is generated from the treatment process of spent activated carbons from the air cleaning system in a nuclear facility, can be decomposed into CaO and CO2 ...
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Article
Chlorination behavior of Li(Ni1/3Co1/3Mn1/3)O2
The chlorination behavior of Li(Ni1/3Co1/3Mn1/3)O2 (NCM) was investigated as a function of the reaction temperature (400–600 °C) and time (1–8 h) for application in a chlorination-based recycling process. Structu...
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Article
A Study on Treatment of Strong Acidic Wastewater Containing a High Concentration of a Nonionic Surfactant and Ionic Materials with Radioactive Nuclides
Radioactively contaminated metal components are generated during the operation or decommissioning of a nuclear power plant. These metals can be effectively decontaminated using a foam containing H2SO4 and Ce(IV) ...
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Article
Chlorination behavior of LiCoO2
The chlorination behavior of LiCoO2 (LCO) was investigated as a function of the reaction temperature (400–600 °C) and time (1–8 h) under a 190 mL/min Ar+10 mL/min Cl2 flow. Based on the results of a structural an...
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Article
Recycling of Li(Ni,Co,Mn)O2 via a chlorination technique
A new approach to recycle Li(Ni,Co,Mn)O2 (NCM, Ni : Co : Mn=1 : 1 : 1) is introduced and experimentally demonstrated. Chlorine gas was employed as a reaction agent to selectively extract Li from NCM. Through a re...
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Article
Chlorination technique for decontamination of radioactive concrete waste contaminated by Sr
The feasibility of the chlorination reaction as a decontamination technique for 90Sr-contaminated concrete waste was investigated via thermodynamic and experimental approaches. Thermodynamic calculations suggeste...
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Article
Electrolytic behavior of SrCl2 and BaCl2 in LiCl molten salt during oxide reduction in pyroprocessing
Ba and Sr elements in spent nuclear fuels are supposed to accumulate in LiCl molten salt electrolyte by forming chlorides (i.e., BaCl2, SrCl2) during oxide reduction in pyroprocessing. An electrochemical examinat...
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Article
Chemical behavior of grey phases in LiCl molten salt for oxide reduction in pyroprocessing
Chemical stabilities of SrZrO3, BaZrO3, and Sr0.5Ba0.5ZrO3 in LiCl molten salt were investigated to evaluate dissolution properties of Sr and Ba in grey phases of spent nuclear fuels during oxide reduction. Sr in...
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Article
Thermodynamic investigation on the behavior of rare earth oxides during electrolytic reduction process
A quantitative analysis on the behavior of rare earth (RE) oxides during the electrolytic reduction process was conducted through thermodynamic calculations. The calculation results can identify the oxide form...
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Article
Evaluation of Pt anode stability in repeated electrochemical oxide reduction reactions for pyroprocessing
The widespread use of Pt anodes in pyroprocessing for oxide reduction inspired us to investigate the stability of a representative Pt anode in repeated UO2 reduction experiments. The formation and subsequent exfo...
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Article
Reoxidation of uranium in electrolytically reduced simulated oxide fuel during residual salt distillation
We report that residual salt removal by high-temperature distillation causes partial reoxidation of uranium metal to uranium oxide in electrolytically reduced simulated oxide fuel. Specifically, the content of...
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Article
Quantitative calculations on the reoxidation behavior of oxide reduction system for pyroprocessing
Reoxidation reaction of metallic uranium in the oxide reduction system for pyroprocessing of used nuclear fuels is quantitatively investigated via calculating thermodynamic equilibrium compositions. The calcul...
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Article
Distillation characteristics of LiCl–Li2O electrolyte for UO2 electrolytic reduction process
As a process improvement, the distillation and recovery of the salts used in UO2 electrolytic reduction is required. The basic characteristics of the distillation of a LiCl–Li2O electrolyte containing UO2 pellets...
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Article
Carbon anode with repeatable use of LiCl molten salt for electrolytic reduction in pyroprocessing
Carbon was investigated as an anode material for electrolytic reduction in pyroprocessing. UO2 was successfully reduced to U repeatedly using the carbon anode and the LiCl molten salt could be reused. While reusi...
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Article
Electrolytic reduction rate of porous UO2 pellets
The electrolytic reduction rate of porous UO2 pellets in a LiCl salt was investigated for various applied charges. The degree of reduction (α) value was evaluated from the ratios of cross-sectional areas of the r...
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Article
Introduction of MKZP (Min Ku Zirconium Process) as an alternative to pyroprocessing for used nuclear fuel management
A new process to co-recover uranium and transuranic nuclides from used nuclear fuels was introduced, which was named ‘MKZP’ (Min Ku Zirconium Process), as an alternative of widely known pyroprocessing. Instea...
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Article
Chlorination reaction kinetics of CsI under cladding hull waste treatment condition: a TGA study
The reaction between cesium iodide (CsI) and chlorine gas was quantitatively investigated using a thermo-gravimetric analysis system. A comparison between calculated and experimental results on the chlorine mo...
