What Net Gain Actually Means

Scientific gain, engineering gain, and plant gain are different bars — and Kronos claims none of them in hardware yet.

Three bars, often confused

"Net gain" is used loosely in public discussion, so it is worth being exact. Scientific gain (Q_sci) compares fusion power produced to heating power delivered to the plasma. Engineering gain (Q_eng) compares net electricity out to all electricity in, including magnets, cooling, and plant loads. Plant gain is the whole facility's balance over real duty cycles. Each bar is higher than the last.

The Kronos position, stated plainly

• The breeder's Q_sci of 3.076 is a simulation result, not a machine measurement.
• No engineering-gain or plant-gain claim is made in hardware for either machine.
• The breeder's purpose is isotopes and neutrons, so its value case does not depend on net electricity at all.
• The burner targets net power but is plug-gated; a net-power claim awaits that gate.

Why the breeder sidesteps the electricity trap

Because the breeder sells tritium, helium-3, and 14 MeV neutrons rather than kilowatt-hours, its usefulness does not wait on engineering net-electric gain. That is an honest advantage: a materials-and-isotopes product can be valuable before the field solves net-electric power. It is also why the program refuses to borrow the electricity-gain narrative it has not earned.