Electrochemical processing of spent nuclear fuels:An overview of oxide reduction in pyroprocessing technology  

作　　者：Eun-Young Choi Sang Mun Jeong 

机构地区：[1]Korea Atomic Energy Research Institute [2]Department of Chemical Engineering,Chungbuk National University

出　　处：《Progress in Natural Science:Materials International》2015年第6期572-582,共11页自然科学进展·国际材料（英文版）

基　　金：supported by a National Research Foundation of Korea (NRF) Grant funded by the Korea Government (MISP) (2015M2B2A9030532;2012M2A8A5025697)

摘　　要：The electrochemical reduction process has been used to reduce spent oxide fuel to a metallic form using pyroprocessing technology for a closed fuel cycle in combination with a metal-fuel fast reactor.In the electrochemical reduction process,oxides fuels are loaded at the cathode basket in molten Li_2O–LiCl salt and electrochemically reduced to the metal form.Various approaches based on thermodynamic calculations and experimental studies have been used to understand the electrode reaction and efficiently treat spent fuels.The factors that affect the speed of the electrochemical reduction have been determined to optimize the process and scale-up the electrolysis cell.In addition,demonstrations of the integrated series of processes(electrorefining and salt distillation) with the electrochemical reduction have been conducted to realize the oxide fuel cycle.This overview provides insight into the current status of and issues related to the electrochemical processing of spent nuclear fuels.The electrochemical reduction process has been used to reduce spent oxide fuel to a metallic form using pyroprocessing technology for a closed fuel cycle in combination with a metal-fuel fast reactor.In the electrochemical reduction process,oxides fuels are loaded at the cathode basket in molten Li_2O–LiCl salt and electrochemically reduced to the metal form.Various approaches based on thermodynamic calculations and experimental studies have been used to understand the electrode reaction and efficiently treat spent fuels.The factors that affect the speed of the electrochemical reduction have been determined to optimize the process and scale-up the electrolysis cell.In addition,demonstrations of the integrated series of processes(electrorefining and salt distillation) with the electrochemical reduction have been conducted to realize the oxide fuel cycle.This overview provides insight into the current status of and issues related to the electrochemical processing of spent nuclear fuels.

关 键 词：Pyroprocessing Electrochemical REDUCTION ELECTROREFINING MOLTEN SALT SPENT OXIDE fuel 

分 类 号：TL24[核科学技术—核燃料循环与材料]