Research Article

Data-Driven and Precursor-Group Uncertainty Propagation of Lattice Kinetic Parameters in UAM Benchmark

Table 5

Comparison of the kinetic parameters evaluation for a PWR pin-cell (BOL) when considering correlated U-235 thermal DND with the uncorrelated case.

Parameter Uncorrelated case Correlated case
Mean Std/mean(%) Mean Std/mean(%)

2.120E-04 1.533E-05 7.2 2.123E-04 3.894E-06 1.8
1.419E-03 4.883E-05 3.4 1.418E-03 9.279E-06 0.7
1.299E-03 9.208E-05 7.1 1.300E-03 2.901E-05 2.2
2.708E-03 6.466E-05 2.4 2.706E-03 2.023E-05 0.8
8.949E-04 4.568E-05 5.1 8.958E-04 1.837E-05 2.1
3.005E-04 3.798E-05 12.6 3.013E-04 7.592E-06 2.5
1.250E-02 2.368E-04 1.9 1.249E-02 5.430E-05 0.4
3.081E-02 7.729E-04 2.5 3.082E-02 1.887E-04 0.6
1.149E-01 3.278E-03 2.9 1.150E-01 1.051E-03 0.9
3.100E-01 9.152E-03 3.0 3.100E-01 3.224E-03 1.0
1.228E+00 1.029E-01 8.4 1.233E+00 3.161E-02 2.6
3.319E+00 2.410E-01 7.3 3.305E+00 1.108E-01 3.4

All kinetic parameters’ uncertainties in this table are caused by DND uncertainty ONLY. The cross-section uncertainties are not propagated.