Run the same activation physics on MetroVolt and on a D-T comparator and the structures answer differently: roughly twenty-five-fold lower activation, and a decommissioning stream that fits the existing low-level-waste disposal pathway.
Neutrons transmute structure; MetroVolt simply makes twenty times fewer of them per unit energy, and at softer relevance to the worst activation chains. The deposited analyses (S68 with the S39 neutronics basis) compute the ~25× activation advantage and map end-of-life inventories onto disposal classes: the vessel and internals track the low-level-waste pathway — no geological repository line item.
This is the same fluence ledger that gives the 30-FPY wall life and the 36-dpa qualification target — one consistent neutron story from operations through decommissioning.
Decommissioning liability is a real number on utility balance sheets. A LLW-pathway plant retires like industrial equipment, not like a nuclear legacy site — smaller bonds, shorter closeout, cleaner community story. 'Low-neutron' keeps paying after the last kilowatt-hour.
| Activation vs D-T comparator | ~25× lower (S68/S39) |
| Disposal pathway | low-level waste (computed inventories) |
| Geological repository need | none identified |
| Consistency | same ledger as wall-life & shielding |
| Wall life context | 30 dpa / 30 FPY ≤ 36-dpa qual |