| Key Parameters | HEU | LEU |
| Reactor type | MNSR | MNSR |
| Fuel type | rod | rod |
| Power, kW | 30 | 34 |
| Fuel rod lattice | 350 | 350 |
| Number of Active Fuel rods | 344 | 335 |
| Number of Dummy rods | 6 | 15 |
| Core diameter (mm) | 230 | 230 |
| Core height (mm) | 230 | 230 |
| Fuel lattice pitch (mm) | 10.95 | 10.95 |
| Coolant inlet pressure (atm) | 1 | 1 |
| Coolant heat transfer mode | Natural convection | Natural Convection |
| Reflector | Beryllium | Beryllium |
| Control rod absorber | Cadmium | Cadmium |
| Control rod cladding | Stainless steel | Stainless steel |
| Number of control rods | 1 | 1 |
| Core shape | Cylindrical | Cylindrical |
| Coolant/moderator | Deionised water | Deionised water |
| Fuel Meat | U-Al4 | UO2 |
| U-235 Total Core Loading, g | ~998.1 | ~1355.3 |
| U-235 Enrichment, wt% | 90.2 | 13.0 |
| U-234 content, wt% | 1.0 | 0.2 |
| U-236 content, wt% | 0.5 | 0.25 |
| Density of Meat, g/cm3 | 3.456 | 10.6 |
| Meat Diameter, mm | 4.3 | 4.3 |
| Cladding Diameter, mm | 5.5 | 5.5 |
| Thickness of He Gap, mm | None | 0.05 |
| Cladding Material | Al-303-1 | Zirc-4 |
| Material for Grid Plates | LT-21 | Zirc-4 |
| Top Shim Tray | LT-21 | LT-21 |
| Material for Dummy Elements | Al-303-1 | Zirc-4 |
| Number of Tie Rods | 4 | 4 |
| Material for Tie Rods | Al-303-1 | Zirc-4 |
| Adjuster Guide Tubes | 4 | 4 |
| Effective Delayed Neutron Fraction | 8.08 × 10−3 | 8.57 × 10−3 |
| Prompt neutron lifetime(s) | 8.12 × 10−5 | 1.41 × 10−4 |
| Maximum thermal Neutron flux, n/cm2s | 1 × 1012 | 1 × 1012 |
| Excess reactivity, mk | 4.0 | 3.87 |
| Control rod worth, mk | 7.0 | 6.90 |
| Shutdown margin, mk | 3.0 | 3.03 |