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

Table 9

Sensitivity analysis results in the maximum time step for case C2.

Parameter	Case C2
Time step (ms)	Reference	100	10	1	0.1	0.01
Time of power peak, s	0.100	0.134; (0.034 s)	0.099; (−0.001 s)	0.118; (0.018 s)	0.099; (−0.001 s)	0.132; (0.032 s)
Power peak	1.071	1.070; (−0.09%)	1.070; (−0.09%)	1.071; (0.00%)	1.070; (−0.09%)	1.071; (0.00%)
Power at 5 s	1.030	1.029; (−0.10%)	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%)	555.2; (0.31%)	555.2; (0.31%)	555.2; (0.31%)	555.2; (0.31%)
Maximum fuel centerline temperature (at 5 s), °C	1733.5	1745.7; (0.70%)	1745.7; (0.70%)	1745.7; (0.70%)	1745.7; (0.70%)	1745.7; (0.70%)
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%)	336.9; (3.82%)