Integrated over a plant lifetime, the burner's low neutron load (5.44% at the design point) keeps the accumulated materials dose inside what the structural alloy can tolerate — a frozen first-wall life of 104 to 428 full-power years, against about 2.5 for the breeder. That translates to roughly 0.035 to 0.144 first-wall changes across 30 years: scheduled-replacement waste is essentially zero.
Materials damage accumulates as displacement-per-atom (dpa) from neutron flux. Because the burner's neutron fraction is only 5.44%, its wall load is roughly an order of magnitude below a D-T plant's, giving a frozen first-wall life of 104-428 fpy. The consequence is that the burner's capacity factor is plug-limited, not damage-limited — the opposite of the breeder, and a genuine mirror advantage (B31).
A wall that lasts the plant's life removes the biggest scheduled outage in fusion operations. That is the difference between a plant that spends months per year changing components and one that mostly runs — the availability advantage the low-neutron thesis rests on.
| Damage metric | displacement per atom (dpa) |
| First-wall life | 104-428 fpy (vs breeder ~2.5) |
| Neutron fraction | 5.44% (M-43 restated) |
| Capacity factor | plug-limited, not damage-limited |
| Scheduled changeouts | none by design |