> So as long as the reactor vessel is intact it absorbs 100% of the neutrons? Going out as well as coming in?
Neutron diffusion is a statistical process, so yeah, a small amount of neutrons will escape through the reactor wall. But not enough that the neutron flux from one reactor would influence the next one in any measurable way.
> Because in a failure you’ll have only one pressure vessel between the two cores. If everything else goes right.
