Research Article
Analysis of NEA-NSC PWR Uncontrolled Control Rod Withdrawal at Zero Power Benchmark Cases with NODAL3 Code
Table 6
Effect of axial node number per FA for fission power and time of peak fission power in Cases A, B, and D.
| | Parameters | Results | Reference | NODAL3 (node number for a axial layer per FA) | | 1 × 18 | 2 × 18 | 4 × 18 | 8 × 18 |
| | Case A | | Fission power relative to nominal (P), % | C1 | 35.56 | 35.39 (0.48%) | 35.37 (0.53%) | 35.32 (0.67%) | 35.36 (0.56%) | | Time of maximum fission power, s | 82.14 | 83.24 (1.34%) | 83.07 (1.13%) | 83.07 (1.13%) | 83.10 (1.17%) |
| | Case B | | Fission power relative to nominal (P), % | C1 | 134.80 | 110.67 (17.90%) | 133.10 (1.26%) | 128.86 (4.41%) | 129.63 (3.84%) | | Time of maximum fission power, s | 34.30 | 34.71 (1.20%) | 34.43 (0.38%) | 34.30 (0.00%) | 34.31 (0.03%) |
| | Case D | | Fission power relative to nominal (P), % | C1 | 96.85 | 109.23 (12.78%) | 93.56 (3.40%) | 96.13 (0.74%) | 97.94 (1.13%) | | Time of maximum fission power, s | 39.40 | 39.91 (1.29%) | 39.32 (0.20%) | 39.33 (0.18%) | 39.33 (0.18%) |
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Note. The radial node number is 2 × 2 nodes; number in parentheses are the absolute value of relative deviation of NODAL3 with the reference.
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