| 核素 | T1/2/a | m/(kg∙Gwe−1∙a−1) | 乏燃料中的含量(%) |
| Np-237 | 2.14 × 106 | 13.0 | 0.052 |
| Am-241 | 433 | 1.6 | 0.0064 |
| Am-243 | 7370 | 3.3 | 0.0132 |
| Cm-244 | 18.11 | 1.01 | 0.00404 |
| Cm-245 | 8.53 | 0.04 | 0.00016 |