Microstructure evolution in Xe-irradiated UO2 at room temperature

Journal Article · Tue Jul 01 00:00:00 EDT 2014 · Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and

OSTI ID:1133858

He, L. F.; Pakarinen, J.; Kirk, M. A.; Gan, J.; Nelson, A. T.; Bai, X. -M.; El-Azab, A.; Allen, T. R.

In situ Transmission Electron Microscopy was conducted for single crystal UO2 to understand the microstructure evolution during 300 keV Xe irradiation at room temperature. The dislocation microstructure evolution was shown to occur as nucleation and growth of dislocation loops at low irradiation doses, followed by transformation to extended dislocation segments and tangles at higher doses. Xe bubbles with dimensions of 1-2 nm were observed after room-temperature irradiation. Electron Energy Loss Spectroscopy indicated that UO2 remained stoichiometric under room temperature Xe irradiation.

• Research Organization: Idaho National Lab. (INL), Idaho Falls, ID (United States)
• Sponsoring Organization: DOE - SC
• DOE Contract Number: DE-AC07-05ID14517
• OSTI ID: 1133858
• Report Number(s): INL/JOU-14-31269
• Journal Information: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and, Vol. 330
• Country of Publication: United States
• Language: English

Related Subjects

11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
bubble
dislocation
Microstructure
UO2
Xe ion irradiation