Perturbation-Theory-Based Sensitivity and Uncertainty Analysis with CASMO-4

Table 3

The five most significant sources of uncertainty for the multiplication factor and the corresponding energy- and region-integrated relative sensitivity coefficients.

Nuclide	Parameter pair	Sensitivity		Contribution to Δ𝑘/𝑘 (%)
		CASMO	TSUNAMI	CASMO	TSUNAMI
^238U	𝜎c,𝜎c	−2.434×10^−1	−2.143×10^−1	3.198×10^−1	2.902×10^−1
^235U	𝜈,𝜈	9.160×10^−1	9.370×10^−1	2.720×10^−1	2.773×10^−1
^235U	𝜎c,𝜎c	−1.027×10^−1	−1.025×10^−1	1.454×10^−1	1.422×10^−1
^235U	𝜎f,𝜎f	4.038×10^−1	4.212×10^−1	1.372×10^−1	1.409×10^−1
^235U	𝜎f,𝜎c	4.038×10^−1	4.212×10^−1	1.238×10^−1	1.245×10^−1
		−1.027×10^−1	−1.025×10^−1