Research Article
NODAL3 Sensitivity Analysis for NEACRP 3D LWR Core Transient Benchmark (PWR)
Table 3
Sensitivity analysis results in the radial node number per assembly for case C2.
| Parameter | Case C2 | Node/assembly | Reference | 1 × 1 | 2 × 2 | 4 × 4 | 8 × 8 |
| Critical boron concentration (ppm) | 1160.6 | 1162.4 (0.16%) | 1151.7 (−0.77%) | 1148.6 (−1.03%) | 1151.8 (−0.76%) | Power peaking factor | 2.221 | 2.221 (0.00%) | 2.237 (0.72%) | 2.241 (0.88%) | 2.239 (0.81%) | Time of power peak, s | 0.100 | 0.079 (−0.021 s) | 0.134 (0.034 s) | 0.189 (0.089 s) | 0.200 (0.100 s) | Power peak | 1.071 | 1.071 (0.00%) | 1.070 (−0.09%) | 1.070 (−0.09%) | 1.070 (−0.09%) | Power at 5 s | 1.030 | 1.029 (−0.10%) | 1.029 (−0.10%) | 1.030 (0.00%) | 1.029 (−0.10%) | Averaged Doppler temperature (at 5 s), °C | 553.5 | 555.1 (0.29%) | 555.2 (0.31%) | 555.3 (0.33%) | 555.3 (0.33%) | Maximum fuel centerline temperature (at 5 s), °C | 1733.5 | 1733.2 (−0.02%) | 1745.7 (0.70%) | 1748.4 (0.86%) | 1747.3 (0.80%) | Coolant outlet temperature (at 5 s), °C | 324.5 | 336.6 (3.73%) | 336.9 (3.82%) | 336.9 (3.82%) | 336.9 (3.82%) |
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