Quote Originally Posted by Duke Malcolm
I was of the impression the current reactors could not produce enough energy to sustain themselves.
They actually passed the treshhold of producing more energy than the energy required to start the process. I'm not sure how much of that energy they can harness though (it's lower). And I'm not sure if that takes in the energy to maintain the magnetic field.

And they still cannot maintain the process for long.

, you need power to start the reaction, and for the magnetic bottle preventing a detonation that would make anyone regreat losing containment (aka, a nuclear device).
Fusion reactors aren't dangerous for the radiation factor, the radiation is relativly low and the most radioactive parts will be the reactor walls after years of use. The problematic stuff is that the plasma will instantly vaporize anything that it'll come in contact with, until it has cooled down.