Perturbation Theory-Based Whole-Core Eigenvalue Sensitivity and Uncertainty (SU) Analysis via a 2D/1D Transport Code

Table 10

Uncertainty contributions of some important nuclide reactions.

Nuclide	Reaction pair	Contribution to Δk/k(%)
^238U	σγ, σγ	3.578E − 01
^235U	ν, ν	2.669E − 01
^235U	σγ, σγ	1.414E − 01
^235U	χ, χ	1.334E − 01
^235U	σf, σf	1.212E − 01
^238U	σs, σs	1.005E − 01
^238U	Ν, ν	9.407E − 02
^1H	σs, σs	3.124E − 02
^238U	σf, σf	2.697E − 02
^1H	σγ, σγ	2.087E − 02
^238U	χ, χ	1.530E − 02
^16O	σs, σs	4.889E − 03
^235U	σs, σs	1.454E − 03
Total	—	0.522