Table 1 Thermal-mechanical properties of proposed accident tolerant and standard UO2 fuel pellets.
Sample condition | Thermal conductivity (W/m·K) | Hardness (GPa) | Fracture toughness (MPa·M1/2) |
|---|---|---|---|
UO2 this work | 7.28 ± 0.02 | 6.3 ± 0.2 | 1.4 ± 0.2 |
UO2-1 wt.% GNP this work | 12.7 ± 1.7 | 4.1 ± 0.3 | 3.5 ± 0.4 |
UO2-5 wt.% GNP this work | 19.1 ± 1.4 | 1.4 ± 0.1 | 3.30 ± 0.1 |
0.5 wt.% TiO2 doped UO228 | 7.8 | 6.4 ± 0.6 | — |
UO2-5 vol. % diamond29 | 9.6 | — | — |
UO2-10 vol. % SiC39 | 10.5 | — | — |
0.05-1% Al(OH)3 doped UO230 | 9.8 | — | — |
Pure UO240 | — | 6.0 ± 0.4 | — |
Ti2O3 doped UO220 | — | 5.26–6.70 | 0.88–1.14 |
UO221 | — | 6.4 ± 0.5 | 1.1 ± 0.2 |
UO222 | — | — | 0.88–1.20 |
UO223 | — | — | 1.012 ± 0.025 |
UO218, nuclear fuel pellet | 6.5–8.5 | — | — |
UO2 single crystal <100> direction19 | 7.59 | — | — |
UO2 single crystal <110> direction19 | 8.53 | — | — |
UO2 single crystal <111> direction19 | 8.44 | — | — |
