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

Table 7

Sensitivity analysis results in the maximum time step for case A2.

Parameter	Case A2
Time step (ms)	Reference	100	10	1	0.1	0.01
Time of power peak, s	0.100	0.200; (0.100 s)	0.100; (0.000 s)	0.117; (0.017 s)	0.105; (0.005 s)	0.135; (0.035 s)
Power peak	1.080	1.077; (−0.28%)	1.076; (−0.37%)	1.076; (−0.37%)	1.076; (−0.37%)	1.076; (−0.37%)
Power at 5 s	1.035	1.032; (−0.29%)	1.032; (−0.29%)	1.032; (−0.29%)	1.032; (−0.29%)	1.032; (−0.29%)
Averaged Doppler temperature (at 5 s), °C	554.6	556.0; (0.25%)	556.0; (0.25%)	556.0; (0.25%)	556.0; (0.25%)	556.0; (0.25%)
Maximum fuel centerline temperature (at 5 s), °C	1691.8	1699.2; (0.44%)	1699.3; (0.44%)	1699.3; (0.44%)	1699.3; (0.44%)	1699.3; (0.44%)
Coolant outlet temperature (at 5 s), °C	324.6	335.1; (3.23%)	335.1; (3.23%)	335.1; (3.23%)	335.1; (3.23%)	335.1; (3.23%)