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

Table 8

Sensitivity analysis results in the maximum time step for case C1.

Parameter	Case C1
Time step (ms)	Reference	10	1	0.1	0.01
Time of power peak, s	0.268	0.265; (−0.003 s)	0.265; (−0.003 s)	0.265; (−0.003 s)	0.264; (−0.004 s)
Power peak	4.773	4.958; (3.88%)	4.958; (3.88%)	4.957; (3.86%)	4.952; (3.75%)
Power at 5 s	0.146	0.142; (−2.74%)	0.142; (−2.74%)	0.142; (−2.74%)	0.142; (−2.74%)
Averaged Doppler temperature (at 5 s), °C	315.9	315.9; (0.00%)	315.9; (0.00%)	315.9; (0.00%)	315.8; (−0.03%)
Maximum fuel centerline temperature (at 5 s), °C	676.1	672.6; (−0.52%)	672.0; (−0.61%)	672.7; (−0.50%)	671.6; (−0.67%)
Coolant outlet temperature (at 5 s), °C	291.5	308.9; (5.97%)	308.9; (5.97%)	308.9; (5.97%)	308.9; (5.97%)