Numerical Study of the Steady-State Subchannel Test-Case with NEPTUNE_CFD for the OECD/NRC NUPEC PSBT Benchmark

Table 6

Calculated void-fraction values with two “opposite” sets of parameters.

	1.2211	1.2223	1.2237	1.4325	1.4326
Exp. Values	0.04	0.31	0.44	0.34	0.53
Nominal Calc. values (𝛼nom)	0.07	0.25	0.36	0.44	0.64
Pressure − 1%
Inlet Temp. + 1 K
Mass flow rate − 1.5%	0.08	0.28	0.39	0.48	0.65
Wall heat flux + 1%
Pressure + 1%
Inlet Temp. − 1 K
Mass flow rate + 1.5%	0.05	0.21	0.32	0.40	0.58
Wall heat flux − 1%