Table 3
Major contributors to the βeff uncertainty with 1σ statistical uncertainties (a = 20, top 15).
| Nuclide | Reaction | Uncertainty (%) |
|
|---|---|---|---|
| Critical core | Subcritical core | ||
| 239Pu |  |
1.683 ± 0.000 | 1.496 ± 0.000 |
| 238U |  |
1.022 ± 0.001 | 0.908 ± 0.001 |
| 241Pu |  |
0.677 ± 0.000 | 0.602 ± 0.000 |
| 238U | Inelastic | 0.389 ± 0.044 | 0.345 ± 0.039 |
| 240Pu |  |
0.307 ± 0.000 | 0.273 ± 0.000 |
| 56Fe | Elastic | 0.274 ± 0.078 | 0.244 ± 0.069 |
| 242Pu |  |
0.215 ± 0.000 | 0.192 ± 0.000 |
| 56Fe | Inelastic | 0.189 ± 0.046 | 0.168 ± 0.041 |
| 206Pb | Inelastic | 0.170 ± 0.019 | 0.151 ± 0.017 |
| 206Pb | Elastic | 0.136 ± 0.044 | 0.120 ± 0.039 |
| 208Pb | Elastic | 0.128 ± 0.042 | 0.114 ± 0.037 |
| 238U | Elastic | 0.128 ± 0.166 | 0.113 ± 0.147 |
| 238U | Fission | 0.115 ± 0.001 | 0.103 ± 0.001 |
| 239Pu | Fission | 0.103 ± 0.002 | 0.091 ± 0.001 |
| 239Pu | Inelastic | 0.099 ± 0.026 | 0.088 ± 0.023 |
| Total | 2.2 ± 0.2 | 2.0 ± 0.2 | |
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