Yes, for reactors operating at atmospheric pressure like MSR or metal cooled reactors, the containment building is much cheaper. And by not needing stuff that s

Yes, for reactors operating at atmospheric pressure like MSR or metal cooled reactors, the containment building is much cheaper. And by not needing stuff that stands up to 15 MPa, you can frickin' stamp out the reactors from sheet metal. Well, not quite, but a lot simpler and faster than building large pressure vessels capable of LWR pressures with 25cm thick walls.