Yeah, for all intents and purposes, I agree. I have a habit of building my nukes away from my main building, but its just a habit. I've never had one actually detonate.When starting a new map and starting IC/2exp, I build a very direwolf20 9x9, with a row of IC2 machines. My nuke goes right there. As a single block that can put out 120EU/t. In the room with all my machines and storage. It hasn't failed yet. And I don't see how it could.
I can totally buy the idea that a multiblock nuke, extending over a chunk boundary, could dynamically re-assemble as a smaller nuke missing some critical cooling components.