کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9793651 1514276 2005 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Determination of uranium and rare-earth metals separation coefficients in LiCl-KCl melt by electrochemical transient techniques
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی هسته ای و مهندسی
پیش نمایش صفحه اول مقاله
Determination of uranium and rare-earth metals separation coefficients in LiCl-KCl melt by electrochemical transient techniques
چکیده انگلیسی
The main step in the pyrometallurgical process of spent nuclear fuel recycling is a molten salt electrorefining. The knowledge of separation coefficients of actinides (U, Np, Pu and Am) and rare-earth metals (Y, La, Ce, Nd and Gd) is very important for this step. Usually the separation coefficients are evaluated from the formal standard potentials of metals in melts containing their own ions, values obtained by potentiometric method. Electrochemical experiments were carried out at 723-823 K in order to estimate separation coefficients in LiCl-KCl eutectic melt containing uranium and lanthanum trichlorides. It was shown that for the calculation of uranium and lanthanum separation coefficients it is necessary to determine the voltammetric peak potentials of U(III) and La(III), their concentration in the melt and the kinetic parameters relating to U(III) discharge such as transfer and diffusion coefficients, and standard rate constants of charge transfer.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Nuclear Materials - Volume 344, Issues 1–3, 1 September 2005, Pages 169-172
نویسندگان
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