I can't even imagine how to make this commercially viable. Even if they reach breakeven, I can't imagine a process that would take less than a minute to reset the reactor for the next run, given the incredible precision necessary with the target, and I suspect my "minute" is <i>grotesquely optimistic</i>.<p>I guess what this goes to show is that "breakeven" itself isn't even all that interesting. "Commercially viable" is what we are looking for. Here's hoping Polywell works out. Vaguely promising signs seem to be coming from the project but it's hard to see much detail through the Navy classification.