NODAL3 Sensitivity Analysis for NEACRP 3D LWR Core Transient Benchmark (PWR)

Table 6

Sensitivity analysis results in the axial node number per assembly for case C2.

Parameter	Case C2
Node/assembly	Reference	1 × 18	2 × 18	4 × 18	8 × 18
Critical boron concentration (ppm)	1160.6	1151.8; (−0.76%)	1151.9; (−0.75%)	1151.9; (−0.75%)	1151.9; (−0.75%)
Power peaking factor	2.221	2.237; (0.72%)	2.239; (0.81%)	2.239; (0.81%)	2.239; (0.81%)
Time of power peak, s	0.100	0.134; (0.034 s)	0.109; (0.009 s)	0.135; (0.035 s)	0.200; (0.100 s)
Power peak	1.071	1.070; (−0.09%)	1.071; (0.00%)	1.071; (0.00%)	1.070; (−0.09%)
Power at 5 s	1.030	1.029; (−0.10%)	1.029; (−0.10%)	1.029; (−0.10%)	1.029; (−0.10%)
Averaged Doppler temperature (at 5 s), °C	553.5	555.2; (0.31%)	555.3; (0.33%)	555.3; (0.33%)	555.3; (0.33%)
Maximum fuel centerline temperature (at 5 s), °C	1733.5	1745.7; (0.70%)	1747.4; (0.80%)	1747.1; (0.78%)	1747.3; (0.80%)
Coolant outlet temperature (at 5 s), °C	324.5	336.9; (3.82%)	336.9; (3.82%)	336.9; (3.82%)	336.9; (3.82%)