From what I understand I think don't know and it hasn't been extensively modeled because we are still trying to just get the process to start. Having said that

From what I understand I think don't know and it hasn't been extensively modeled because we are still trying to just get the process to start. Having said that I think that if the reactions containment breaks the actual fusion process breaks down super fast and cools much faster then something like a meltdown at a fission reactor. If any more qualified wants to refute any of this please do.