| Process step | ThO2 | (Th,14%U)O2 | ||||
|
| Particle size | Specific surface area (m2∙g−1) | Particle size | Specific surface area (m2∙g−1) | ||
| Jaw crushing | 0.9 - 1 mm (>0.9) | < 1 | 0.9 - 1 mm (>0.9) | < 1 | ||
| Air oxidation | --- | --- | 700 - 800 µm (>0.8) | 1.12 | ||
| Attritor milling | 180 - 250 µm (>0.9) | 1.6 | 125 - 150 µm (>0.9) | 1.7 | ||
| Microwave denitration and milling | 1.7 µm | 3.5 | 1.6 µm | 5.0 | ||
| Microwave denitration using PVA and milling | 1.5 µm | 7.4 | 1.42 µm | 7.7 | ||