> When you tell me something "completely eliminates" the possibility of failure in complex industrial design - you're being emotional rather than logical.

No.

Modern reactor designs are actually designed in a way that makes it difficult to maintain the reaction. If you are not actively maintaining it, then it will stop on its own. This is opposed to the most common existing designs, where you need to expend effort to _stop_ the reaction.

This is not to say that they cannot fail in some novel ways.