WIMS Library Update Project
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WIMS Library Update Project |
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D2O-moderated 235UO2-ThO2 critical lattices (Th5-HW/CRITD2O)
Analysis of Lattice Experiments with 19-rod Clusters with ThO2-UO2 Fuel
Measurements were made with
ThO2 fuel containing 1.5 w%
enriched UO2 (93.02 atm % U235)
using heavy water and air coolants. Buckling measurements were performed at
four triangular
lattice pitches of 22, 24, 28 and 32 cm and detailed reaction rate measurements
were carried out
at 22 and 28 cm only.
| Pitch (cm) | zed2t4d22,a22:
22.0 zed2t4d28,a28: 28.0 |
| Lattice geometry | Hexagonal |
| Coolant | zed2t4d22,d28:
D2O zed2t4a22,a28: Air |
| Moderator | D2O |
| Number of rods | 19 (1/6/12) |
| Radius of rod centers (cm) | 0.0/1.468/2.837 |
| Fuel material | [ThO2(98.5w%)]-[UO2-93at%(1.5w%)] |
| Density of fuel material (g/cm3) | 9.33 |
| Radius of fuel rods (cm) | 0.5765 |
| Sheath material | Zry-2 |
| Density of sheath material (g/cm3) | 6.55 |
| Internal radius of sheath (cm) | 0.5815 |
| Thickness of sheath (cm) | 0.0406 |
| Material of coolant tube | Alcan 6068 Al alloy |
| Density of coolant tube (g/cm3) | 2.7 |
| Internal radius of coolant tube (cm) | 3.683 |
| Thickness of coolant tube (cm) | 0.127 |
| Temperature (K) | 294.8 |
| Experimental
bucklings (1/cm2) |
zed2t4d22:
0.00024 zed2t4a22: 0.00023 zed2t4d28: 0.00015 zed2t4a28: 0.00016 |