It wouldn't hurt you a bit if containment failed while you're in the building. The fusion plasma is held at very high temperature but there's very little of it.

It wouldn't hurt you a bit if containment failed while you're in the building. The fusion plasma is held at very high temperature but there's very little of it. It's only ever at high pressure in inertial fusion, which doesn't actually contain the plasma at all except for a tiny fraction of a second before it explodes by design.