Science and Technology of Nuclear Installations

Research Article

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

Table 5

Effect of the experimental uncertainties on the calculated void fraction.
 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 ( 𝛼 n o m )0.07 0.25 0.36 0.44 0.64
Pressure ± 1% 𝛼 n o m ± 0 . 0 2 𝛼 n o m ± 0 . 0 2 𝛼 n o m ± 0 . 0 2 𝛼 n o m ± 0 . 0 1 𝛼 n o m ± 0 . 0 1
Inlet Temp. ± 1 K 𝛼 n o m ± 0 . 0 2 𝛼 n o m ± 0 . 0 2 𝛼 n o m ± 0 . 0 2 𝛼 n o m ± 0 . 0 1 𝛼 n o m ± 0 . 0 1
Mass flow rate ± 1.5% 𝛼 n o m ± 0 . 0 1 𝛼 n o m ± 0 . 0 1 𝛼 n o m ± 0 . 0 1 𝛼 n o m ± 0 . 0 1 𝛼 n o m ± 0 . 0 1
Wall heat flux ± 1% 𝛼 n o m ± 0 . 0 1 𝛼 n o m ± 0 . 0 1 𝛼 n o m ± 0 . 0 1 𝛼 n o m ± 0 . 0 1 𝛼 n o m ± 0 . 0 1