[ken5050]

If the cut the sub open to add a new segment to increase the length, I assume they can cut the hull where the reactor is to remove it, and swap in a new one..

I expect the experst here will let us know soon enough..

[PreciousLiberty]

“If the cut the sub open to add a new segment to increase the length”

That’s being done at construction time, not after the hulls have endured underwater pressure stresses for years. Metal fatigues over time.

“I expect the experst here will let us know soon enough..”

I hope so, I’m interested in the definitive answer. If there weren’t a good reason to retire subs worth billions of dollars, I doubt we’d be doing it.