Table 1
Input data for the volumetric homogenization method
| A. Material data |
| Uranium enrichment |
| Natural abundances of isotopes Atomic weights of isotopes |
| Weight fractions of each dioxide in the dioxide mix |
| Densities of fuel and no-fuel materials |
| B. Geometry |
| TRISO kernel radius |
| TRISO layers thickness |
| TRISO packing fraction |
| Fuel compact radius |
| Fuel compact height |
Fig. 1
Radial cross-cut of the reactor core.
Table 2
Main geometrical parameters of the core
| Baffle radius (cm) | 200 |
| Active height (cm) | 800 |
| Reflector thickness (top/bottom) (cm) | 120/160 |
| Number of blocks (without CR/with CR) | 250/60 |
| Number of CR (core/reflector) | 12/18 |
| Fuel block | |
| Apothem (cm) | 18 |
| Height (cm) | 80 |
| Number of cooling channels per block: | |
| – without CR: small/large | 6/102 |
| – with CR: small/large | 7/88 |
| Cooling channel radius (small/large) (cm) | 0.635/0.8 |
| Pitch (cm) | 1.88 |
| Radius of CR channel (cm) | 6.5 |
| Radius of fuel channel (cm) | 0.635 |
| Number of fuel channels (without CR/with CR) | 216/182 |
| Fuel compact | |
| Radius (cm) | 0.6225 |
| Height (cm) | 5 |
Table 3
Geometry of TRISO particles
| TRISO | Thickness (mm) | Density (g/cm3) |
|---|---|---|
| Fuel | 600/700 (diameter) | 10.42 (UO2)/9.5 (ThO2) |
| BPC | 95 | 1.05 |
| IPyC | 40 | 1.90 |
| SiC | 35 | 3.18 |
| OPyC | 40 | 1.90 |
Table 4
Fuel parameters for the volumetric homogenization method
| Case | rKR (cm) | wUO2,FR (wt%) | wThO2,FR (wt%) | wiU235 (%) | P (%) | Mass 235U (kg) | Mass 238U (kg) | Mass 232Th (kg) |
|---|---|---|---|---|---|---|---|---|
| 1 | 0.35 | 50 | 50 | 20 | 15 | 204.76 | 816.46 | 1018.70 |
| 2 | 0.30 | 40 | 60 | 20 | 15 | 205.05 | 820.22 | 681.43 |
| 3 | 0.35 | 55 | 45 | 20 | 17 | 207.68 | 832.01 | 1267.00 |
| 4 | 0.35 | 60 | 40 | 25 | 15 | 203.35 | 610.04 | 1216.20 |
Fig. 2
Evolution of Keff.
Fig. 3
Evolution of 233U.
Fig. 4
Evolution of 235U.
Fig. 5
Evolution of 239Pu.
Fig. 6
Evolution of 241Pu.