[wolfram74]

It's somewhat generous to call it a He3 generator though, since the half life of tritium is 12 years, you'd need to make sure you made most of the He3 you need over a decade in advance.

He3 has uses besides as a fusion fuel though, so maybe they can overshoot their estimated consumption rate by an order of magnitude and sell or stockpile the surplus 10 years later?

[DennisP]

Only half of the D-D reactions produce tritium. The other half produce He3 directly.

[wolfram74]

That helps considerably, they can over produce initially and taper down as the tritium backlog decays.