119th General Meeting of the KCS

Type Poster Presentation
Area 분석화학
Room No. 포스터발표장
Time 4월 21일 (금요일) 13:00~14:30
Code ANAL.P-191
Subject Chemical variations at the interface between UO2 and Zr by high temperature annealing
Authors 윤영상*, 김종구1, 이정묵, 김종윤, 하영경
한국원자력연구원 원자력화학연구부, Korea
1한국원자력연구원 원자력연구팀, Korea
Abstract The temperature-dependent changes of the interface between uranium dioxide and zirconium in UO2-Zr systems by various annealing were studied using X-ray photoelectron spectroscopy (XPS). The U 4f and Zr 3d core-level spectra show that the uranium dioxide exists as hyperstoichiometric UO2+x at room temperature and as UO2 after annealing with zirconium, whereas the zirconium was spontaneously oxidized to ZrO2 at room temperature and various features such as α-Zr(O), (U,Zr)O2, ZrO2, and suboxides after annealing with uranium dioxide. Furthermore, we observed that the molten product was composed of α-Zr(O), (U,Zr)O2 and ZrO2 when a UO2-Zr sample was fully melted. In this work, we represented the definite study for the variations of the interfacial products in UO2-Zr systems as a function of temperature.
E-mail ysyoun@kaeri.re.kr