Kronos Fusion Energy has frozen the design point of its Hyperion breeder at a fusion gain of Q = 3.076, publishing the full dataset under DOI 10.5281/zenodo.22645691.
The frozen figure is a materials-breeding metric, not a net-power claim. The breeder is judged on its output of bred material at the locked operating point rather than on electricity delivered to the grid.
The breeder is judged on its output of bred material at the locked operating point rather than on electricity delivered to the grid.
Publishing the design point alongside an open dataset allows independent groups to reproduce the calculation end to end, from plasma parameters to breeding performance.
The freeze marks the transition from design iteration to engineering execution: downstream subsystems — magnets, blanket, and thermal handling — now anchor to a fixed reference case.
The breeder design point sits alongside its companion burner reference case and a shared REBCO conductor basis, both also published with public datasets.