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

Table 10

Sensitivity analysis results in the number of nodes for the fuel pellet heat conduction for case A1.

Parameter	Case A1
Node/RD-FUEL	Reference	5	9	18	36
Time of power peak, s	0.560	0.568; (0.008 s)	0.566; (0.006 s)	0.566; (0.006 s)	0.567; (0.007 s)
Power peak	1.180	1.145; (−2.97%)	1.172; (−0.68%)	1.180; (0.00%)	1.186; (0.51%)
Power at 5 s	0.196	0.187; (−4.59%)	0.188; (−4.08%)	0.188; (−4.08%)	0.182; (−7.14%)
Averaged Doppler temperature (at 5 s), °C	324.3	323.3; (−0.31%)	323.4; (−0.28%)	323.4; (−0.28%)	323.4; (−0.28%)
Maximum fuel centerline temperature (at 5 s), °C	673.3	658.4; (−2.21%)	659.7; (−2.02%)	659.9; (−1.99%)	660.1; (−1.96%)
Coolant outlet temperature (at 5 s), °C	293.1	308.7; (5.32%)	308.7; (5.32%)	308.7; (5.32%)	308.7; (5.32%)