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Preparation and Characterization of Large Grain UO2 for Accident Tolerant Fuel
- Source :
- Frontiers in Materials, Vol 8 (2021)
- Publication Year :
- 2021
- Publisher :
- Frontiers Media S.A., 2021.
-
Abstract
- Large grain UO2 is considered as an accident tolerant fuel with great application potential due to its competitive advantage of good fission gas retention. In this paper, the influence of preparation parameters such as sintering atmosphere, mixing process, powder pretreatment and grain growth additives on the grain size of UO2 is systematically studied. The result shows that the factors mentioned above have different effects on the grain size of UO2. The grain growth of UO2 pellet sintered in oxidizing atmosphere is better than those in reducing atmosphere. The wet mixing process has a significant advantage over the dry mixing process. In addition, the powder pretreatment has little effect on grain growth while the influence of additives plays the main role. Large grain UO2 pellets with uniform grain size up to 150 μm are successfully prepared. Finally, the thermo-physical properties of the pellets are investigated.
- Subjects :
- additive
Materials science
lcsh:T
Reducing atmosphere
Materials Science (miscellaneous)
Metallurgy
Mixing (process engineering)
Pellets
food and beverages
accident tolerant fuel
02 engineering and technology
preparation process parameters
021001 nanoscience & nanotechnology
01 natural sciences
lcsh:Technology
Grain size
010305 fluids & plasmas
Atmosphere
Grain growth
0103 physical sciences
Oxidizing agent
Pellet
0210 nano-technology
atmosphere sintering
large grain UO2
Subjects
Details
- Language :
- English
- ISSN :
- 22968016
- Volume :
- 8
- Database :
- OpenAIRE
- Journal :
- Frontiers in Materials
- Accession number :
- edsair.doi.dedup.....dab34ef56a27d61550e9184442262e9f