Analysis of NEA-NSC PWR Uncontrolled Control Rod Withdrawal at Zero Power Benchmark Cases with NODAL3 Code
Table 2
Effect of radial node number per FA for steady-state parameters in Cases A, B, and D.
Parameters
Results
Reference
NODAL3 (node number per FA)
1 × 1
2 × 2
4 × 4
Case A
Critical boron concentration, ppm
B1
1262.7
1278.7 (1.27%)
1266.5 (0.30%)
1262.9 (0.02%)
Axial power peak factor,
B2
1.513
1.515 (0.13%)
1.513 (0.00%)
1.515 (0.13%)
Radial power peak factor,
B3
1.242
1.238 (0.32%)
1.234 (0.64%)
1.252 (0.81%)
Global (3D) power peak factor,
B6
1.880
1.877 (0.16%)
1.868 (0.64%)
1.897 (0.90%)
Case B
Critical boron concentration, ppm
B1
793.60
800.5 (0.87%)
795.0 (0.18%)
793.5 (0.01%)
Axial power peak factor,
B2
1.507
1.508 (0.07%)
1.508 (0.07%)
1.508 (0.07%)
Radial power peak factor,
B3
1.912
1.889 (1.20%)
1.905 (0.37%)
1.911 (0.05%)
Global (3D) power peak factor,
B6
2.886
2.852 (1.18%)
2.877 (0.31%)
2.885 (0.03%)
Case D
Critical boron concentration, ppm
B1
793.60
800.5 (0.87%)
795.0 (0.18%)
793.5 (0.01%)
Axial power peak factor,
B2
1.507
1.508 (0.07%)
1.508 (0.07%)
1.508 (0.07%)
Radial power peak factor,
B3
1.912
1.889 (1.20%)
1.905 (0.37%)
1.911 (0.05%)
Global (3D) power peak factor,
B6
2.886
2.852 (1.18%)
2.877 (0.31%)
2.885 (0.03%)
Note. The axial node number is 1 × 18 nodes per axial layer; number in parentheses are the absolute value of relative deviation of NODAL3 with the reference.
