This really sounds much too dangerous, much too unstable, to be a viable energy source.
It isn’t as dangerous as you might think. IF we got fusion working, in the event of a containment failure, it would certainly destroy things in the immediate vicinity of the reactor, but it isn’t a city-busting event. Without the pressure of the containment field, the plasma would very quickly dissipate. Unhealthy to stand beside in the event of a failure, to be sure. But no Chernobyl.