Raman study of the oxidation in (U, Pu)O2 as a function of Pu content

被引：24
|
作者：
Elorrieta, J. M. [1 ]
Manara, D. [2 ]
Bonales, L. J. [1 ]
Vigier, J. F. [2 ]
Dieste, O. [2 ]
Naji, M. [2 ]
Belin, R. C. [3 ]
Baonza, V. G. [4 ]
Konings, R. J. M. [2 ]
Cobos, J. [1 ]
机构：
[1] CIEMAT, Ctr Invest Energet Medioambientales & Tecnol, Ave Complutense 40, Madrid 28040, Spain
[2] European Commiss, JRC, Postfach 2340, D-76125 Karlsruhe, Germany
[3] CEA, DEN, DEC, SESC,LLCC, F-13108 St Paul Les Durance, France
[4] Univ Complutense, MALTA Consolider Team, Dept Quim & Fis 1, Fac Ciencias Quim, E-28040 Madrid, Spain
来源：
JOURNAL OF NUCLEAR MATERIALS | 2017年 / 495卷
关键词：
Interim storage; Nuclear waste; Uranium-plutonium mixed oxides; Raman spectroscopy; Oxidation; PLUTONIUM MIXED OXIDES; X-RAY-DIFFRACTION; URANIUM-DIOXIDE; SOLID-SOLUTIONS; SPECTROSCOPY; SPECTRUM; BEHAVIOR; SYSTEM; UO2; TEMPERATURES;
D O I：
10.1016/j.jnucmat.2017.08.043
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
This work presents a systematic Raman study of the matrix oxidation in a variety of (U1-y, Pu-y) O-2 compositions (0 <= y <= 0.46) at different temperatures, between 250 degrees C and 400 degrees C. Our results indicate that the increase in Pu content hinders the oxidation process of the dioxide matrix. Further oxidation of the uranium-plutonium mixed dioxides in air starts between 250 degrees C and 310 degrees C, on a time scale of several hours. M4O9 seems to be the most stable intermediate phase formed upon oxidation of all the investigated mixed oxides, before final oxidation to M3O8. In addition, X-ray diffraction measurements and SEM images confirm the trend observed by Raman spectroscopy, i.e. Pu stabilises the fcc structure of the dioxide. (C) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码：484 / 491
页数：8
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