This analysis groups fission fragment populations with an odd kluge of aggregation methods. The first group consists of the nine half-life bins, Time_Bins 0-8. The numbers for these exclude isomers and shadow-side nuclides, which are listed separately. The shadowed numbers include isomers, so the given isomer values are for the main decay chains only.
Contribution by Group
| Group | Isotopes | Yield (atoms) | Contribution (%) |
|---|---|---|---|
| 0_Zero | 437 | 0.068 | 3.2e-6 |
| 1_Sec | 174 | 39.71 | 0.0002 |
| 2_Min | 91 | 1872 | 0.09 |
| 3_Hour | 42 | 29451 | 1.4 |
| 4_Day | 39 | 511648 | 24.4 |
| 5_Year | 9 | 144113 | 6.87 |
| 6_Millennia | 7 | 178269 | 8.5 |
| 7_Primordial | 15 | 328774 | 15.67 |
| 8_Stable | 93 | 899441 | 42.89 |
| Shadowed | 84 | 67.45 | 0.003 |
| Isomers | 165 | 3471.65 | 0.166 |
Yields for Timestep 20 (12 days), 235-U/Slow with capture
There are a total of 2,097,152 (2Meg) atoms in the waste stream at Snapshot 20. About 45% 0f those are stable by then, and 16% are primordial.
Caveat
The contribution of shadow-side nuclides increases with neutron capture. Some stable isotope can capture a neutron and move to the right on the NuDat chart. This can place them on an Isolated Island. From there, a B- decay will move them to the second sink.