Short answer: No, that can't happen. Fusion reactors and conventional nuclear (fission) reactors are very different. Only poorly designed fission reactors can

Short answer: No, that can't happen. Fusion reactors and conventional nuclear (fission) reactors are very different. Only poorly designed fission reactors can meltdown and release large amounts of highly radioactive material into the environment. And no nuclear power reactor of any kind can explode into a giant fireball like a nuclear bomb; that only happens on TV shows.