Bubble formation and Kr distribution in Kr-irradiated UO2
- Univ. of Wisconsin, Madison, WI (United States) Dept. of Engineering Physics
- Univ. of Florida, Gainesville, FL (United States) Dept. of Materials Science and Engineering
- Purdue Univ., West Lafayette, IN (United States) School of Nuclear Engineering
- Idaho National Lab. (INL), Idaho Falls, ID (United States)
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Univ. of Wisconsin, Madison, WI (United States) Dept. of Engineering Physics; Idaho National Lab. (INL), Idaho Falls, ID (United States)
In situ and ex situ transmission electron microscopy observation of small Kr bubbles in both single-crystal and polycrystalline UO2 were conducted to understand the inert gas bubble behavior in oxide nuclear fuel. The bubble size and volume swelling are shown as a weak function of ion dose but strongly depend on the temperature. The Kr bubble formation at room temperature was observed for the first time. The depth profiles of implanted Kr determined by atom probe tomography are in good agreement with the calculated profiles by SRIM, but the measured concentration of Kr is about 1/3 of calculated one. This difference is mainly due to low solubility of Kr in UO2 matrix, which has been confirmed by both density-functional theory calculations and chemical equilibrium analysis.
- Research Organization:
- Energy Frontier Research Centers (EFRC) (United States). Center for Materials Science of Nuclear Fuel (CMSNF); Idaho National Lab. (INL), Idaho Falls, ID (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- AC07-05ID14517
- OSTI ID:
- 1162206
- Report Number(s):
- INL/JOU-14-31268; TRN: US1500178
- Journal Information:
- Journal of Nuclear Materials, Vol. 456, Issue C; ISSN 0022-3115
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
KRYPTON
URANIUM DIOXIDE
BUBBLES
DENSITY FUNCTIONAL METHOD
TRANSMISSION ELECTRON MICROSCOPY
MONOCRYSTALS
TEMPERATURE RANGE 0273-0400 K
SIZE
DEPTH DOSE DISTRIBUTIONS
RADIATION DOSES
POLYCRYSTALS
SWELLING
TOMOGRAPHY
ABUNDANCE
ATOMS
KRYPTON IONS
PROBES
SOLUBILITY
TEMPERATURE DEPENDENCE
TEM
UO2
BUBBLE FORMATION
KR IRRADIATED