Research Article
Benchmark of Subchannel Code VIPRE-W with PSBT Void and Temperature Test Data
Table 1
Description of PSBT void and mixing tests.
| Parameter | B5 | B6 | B7 | A1 |
| Number of heated rods | 25 | 25 | 24 | 25 | Heated rod (OD) (mm) | 9.50 | 9.50 | 9.50 | 9.50 | Thimble rod OD (mm) | — | — | 12.24 | — | Rod-to-rod pitch (mm) | 12.60 | 12.60 | 12.60 | 12.60 | Test section inner width (mm) | 64.9 | 64.9 | 64.9 | 64.9 | Axial power profile | Uniform | Cosine | Cosine | Uniform | Hot/cold rod power ratio | 1.00/0.85 | 1.00/0.85 | 1.00/0.85 | 1.00/0.25 | Grid spacers and axial elevations (mm) | 7 mixing vane grid spacers: | 471, 925, 1378, 1832, 2285, 2739, 3247 | 2 nonmixing vane grid spacers: | 2.5, 3755 | 8 simple support grid spacers: | 237, 698, 1151, 1605, 2059, 2512, 2993, 3501 | Test description | Steady-state and | Steady-state | Steady-state | Steady-state | transient void | and transient void | and transient void | mixing |
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