New Strategies in the Code of Uncertainty and Sensitivity Analysis (CUSA) and Its Application in the Nuclear Reactor Calculation

Table 3

The top 3 sources of uncertainty in²³⁸U effective resonance scattering XS.

Energy group	Contributions to the relative uncertainty (%)
	^238U -elastic	^16O-elastic	^1H elastic
15	7.635E − 01 ± 5.403E − 02	1.145E − 02 ± 8.101E − 04	4.243E − 03 ± 3.003E − 04
16	7.630E − 01 ± 5.399E − 02	1.343E − 02 ± 9.500E − 04	5.059E − 03 ± 3.580E − 04
17	7.428E − 01 ± 5.256E − 02	1.324E − 02 ± 9.369E − 04	1.145E − 02 ± 8.106E − 04
18	8.007E − 01 ± 5.666E − 02	1.831E − 02 ± 1.296E − 03	2.265E − 02 ± 1.603E − 03
19	7.983E − 01 ± 5.649E − 02	1.767E − 02 ± 1.250E − 03	2.285E − 02 ± 1.617E − 03
20	1.043E + 00 ± 7.378E − 02	9.930E − 03 ± 7.026E − 04	6.816E − 03 ± 4.823E − 04
21	1.739E + 00 ± 1.231E − 01	1.395E − 02 ± 9.872E − 04	4.402E − 03 ± 3.115E − 04
22	2.586E + 00 ± 1.831E − 01	1.345E − 02 ± 9.520E − 04	4.375E − 03 ± 3.096E − 04
23	5.790E + 00 ± 4.111E − 01	1.086E − 02 ± 7.685E − 04	3.582E − 03 ± 2.534E − 04
24	5.756E + 00 ± 4.086E − 01	2.316E − 02 ± 1.639E − 03	7.555E − 03 ± 5.346E − 04
25	1.162E + 01 ± 8.337E − 01	1.464E − 02 ± 1.036E − 03	4.805E − 03 ± 3.400E − 04
26	1.108E + 01 ± 7.938E − 01	2.401E − 05 ± 1.699E − 06	6.803E − 06 ± 4.814E − 07
27	1.439E + 00 ± 1.019E − 01	2.993E − 03 ± 2.118E − 04	9.874E − 04 ± 6.987E − 05