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Graphite flakes/UO2 fuel pellets with excellent thermal conductivity in radial direction.
- Source :
-
Journal of Nuclear Materials . Mar2021, Vol. 545, pN.PAG-N.PAG. 1p. - Publication Year :
- 2021
-
Abstract
- • Graphite flakes were used to improve the radial thermal conductivity of UO 2. • Graphite flakes/UO 2 presented highly-oriented structure and well-bonded interface. • The radial thermal conductivity of graphite flakes/UO 2 was greatly improved by ~200%. In order to increase the radial thermal conductivity (TC) of UO 2 pellets, highly-oriented graphite flakes (GFs) were first introduced to UO 2 pellets by spark plasma sintering. The radial TC of GFs/UO 2 agreed well with Hatta-Taya model, which was closely related to the well-bonded interface and highly-oriented structure. Compared with UO 2 , the radial TC of GFs/UO 2 was greatly improved by about 200 % within a wide temperature range, higher than all the other reported value until now. Such enhancement in TC would significantly improve the safety of UO 2 fuel pellets. [ABSTRACT FROM AUTHOR]
- Subjects :
- *THERMAL conductivity
*GRAPHITE
*WOOD pellets
*INTERFACE structures
Subjects
Details
- Language :
- English
- ISSN :
- 00223115
- Volume :
- 545
- Database :
- Academic Search Index
- Journal :
- Journal of Nuclear Materials
- Publication Type :
- Academic Journal
- Accession number :
- 148335506
- Full Text :
- https://doi.org/10.1016/j.jnucmat.2020.152639