Uncertainty Analysis of Light Water Reactor Fuel Lattices

Table 4

Uncertainty in 𝑘_inf in GEN-III unit cells.

Fuel	Compositions	𝑘inf	Uncertainty in 𝑘inf (%  Δ𝑘/𝑘)	Largest uncertainty-contributing reaction
MOX	9.8%  ^239Pu	1.0921	0.94	^238U(𝑛,𝑛^′)
	6.5%  ^239Pu	1.0540	0.97	^238U(𝑛,𝑛^′)
	3.7%  ^239Pu	1.0115	0.99	^238U(𝑛,𝑛^′)
UOX	4.2%  ^235U	1.2431	0.51	^238U(𝑛,𝛾)
	3.2%  ^235U	1.1741	0.54	^238U(𝑛,𝛾)
	2.1%  ^235U	1.0490	0.59	^238U(𝑛,𝛾)
UOX-Gd2O3	2.2%  ^235U	0.2166	1.79	^238U(𝑛,𝑛^′)
	1.9%  ^235U	0.1997	1.94	^238U(𝑛,𝑛^′)