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

Table 7

Total sensitivity coefficients and uncertainty contributions to Δk/k (%) of some important nuclide reactions.

Nuclide	Reaction pair	Sensitivity			Contribution to Δk/k (%)
		HNET	Tsunami-2D	Re (%)	HNET	Tsunami-2D	Re (%)
^238U	σγ, σγ	−2.753E − 01	−2.517E − 01	9.40	3.536E − 01	3.246E − 01	8.93
^235U	ν, ν	9.262E − 01	9.241E − 01	0.23	2.654E − 01	2.648E − 01	0.23
^235U	σγ, σγ	−1.228E − 01	−1.226E − 01	0.15	1.630E − 01	1.637E − 01	0.43
^235U	χ, χ	6.691E − 08	−2.168E − 08	408.5	1.225E − 01	1.249E − 01	1.94
^238U	σs, σs	−8.930E − 03	−1.061E − 02	15.83	1.166E − 01	1.643E − 01	29.02
^235U	σf, σf	3.577E − 01	3.581E − 01	0.12	1.140E − 01	1.133E − 01	0.64
^238U	ν, ν	7.367E − 02	7.580E − 02	2.81	8.490E − 02	8.885E − 02	4.44
^1H	σs, σs	1.850E − 01	1.797E − 01	2.95	3.418E − 02	3.453E − 02	1.02
^1H	σγ, σγ	−4.413E − 02	−4.448E − 02	0.80	2.205E − 02	2.221E − 02	0.74