The same attach was levied against AC Power. In general the goal is for an exothermic reaction. It should be possible. Perpetual Motion Machine would be one th

The same attach was levied against AC Power. In general the goal is for an exothermic reaction. It should be possible. Perpetual Motion Machine would be one that could sustain itself without fuel. This one can't. It has to use heavy water and helium to form the plasma. To be an actual perpetual motion machine, the system would have to create enough energy to be converted into hydrogen (E=MC^2 and all), then feed itself with the new fuel. Even at 8 times the energy output, they can't get enough energy to create parts of the fuel.