Learn › Questions people ask
Question
Has Kronos built a fusion reactor yet?
No. Kronos is at the design and simulation-validation stage, with an open 81-analysis record and a pre-registered gate program ahead. The numbers are design points.
This is a question Kronos answers plainly, because overclaiming is how fusion loses credibility. There is no built machine — MetroVolt is a validated design, and every figure on these pages is a design-point value on a gated schedule, backed by the open 81-analysis record.
What the company promises is not a finished reactor but a transparent path: pre-registered predictions, tested at gates, published regardless of outcome.
Questions & answers
Has Kronos built a working reactor?
No, and the company is explicit about that. Kronos is at the design and simulation-validation stage. Its numbers — 2.41 GW fusion power, 0.61–0.84 GWe net electric, and so on — are design-point values validated against simulation, not measurements from an operating machine.
So what exists today?
A fully worked, cross-validated design; an openly deposited record of 81 analyses (code and data, CC BY 4.0); and a pre-registered gate program. The first hardware milestone is the G1 confinement testbed.
Isn't that just theory?
It is a design study backed by simulation and the existing experimental record (for example the DIII-D negative-triangularity results), with the honest open questions named. Kronos's whole method is to test the load-bearing claims at gates rather than assert them — and to publish the results either way.
Honest gapKronos has not built a reactor. All performance figures are design-point values validated against simulation and the existing experimental record; the load-bearing physics is tested at the G1–G3 gates.