S81 — Low-neutron lifetime dividend

S81: Low-neutron lifetime dividend. Design-space study (forward-looking), part of the Kronos MetroVolt 81-analysis validation record.

Register ID

S81

Campaign

Design-space studies (forward-looking)

Status

Design-space study (forward-looking)

S81 budgets neutron fluence, activation, and shielding — the quantities a low-neutron design works to minimize.

What the register records

Favourable by derivation: at f_n=5.25% the first wall lasts the full 30 full-power-years (30 dpa ≤ 36-dpa qualification, no breeding blanket), versus a D-T comparator's ~20-25 blanket changeouts — structurally avoiding a 33-42% LCOE/availability penalty.

This is a register summary of a deposited analysis; its title and notes quote the deposit as-run, so parameters here may reflect the pre-Mode-D basis where they differ — all operating claims cite the frozen Mode-D point (ratified 24 July 2026). Full input decks, scripts, and output data for every analysis S01–S81 are released openly under CC BY 4.0.