Analysis of NEA-NSC PWR Uncontrolled Control Rod Withdrawal at Zero Power Benchmark Cases with NODAL3 Code

Table 5

Effect of radial 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 per FA)
			1 × 1	2 × 2	4 × 4
Case A
Fission power relative to nominal (), %	C1	35.56	35.31 (0.70%)	35.39 (0.48%)	35.39 (0.48%)
Time of maximum fission power, s		82.14	84.27 (2.59%)	83.24 (1.34%)	82.81 (0.82%)
Case B
Fission power relative to nominal (), %	C1	134.80	113.77 (15.60%)	110.67 (17.90%)	110.11 (18.32%)
Time of maximum fission power, s		34.30	34.70 (1.17%)	34.71 (1.20%)	34.68 (1.11%)
Case D
Fission power relative to nominal (), %	C1	96.85	112.10 (15.75%)	109.23 (12.78%)	108.81 (12.35%)
Time of maximum fission power, s		39.40	39.40 (0.00%)	39.91 (1.29%)	40.01 (1.55%)

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.