And what happens when you're fighting an ISIS-like group, and they overrun your remote base and capture your mini-reactor? You've just given them a dirty bomb.

And what happens when you're fighting an ISIS-like group, and they overrun your remote base and capture your mini-reactor? You've just given them a dirty bomb. Doesn't matter if the reactor is perfectly safe under normal conditions. They can take it apart and use the spent fuel for whatever they want.