All I can say about McGuire is 'I hope you are small.' And I have never been there.
It is an Ice Condenser PWR which means that the containment is VERY small (the Aux building is smaller than average, too) because they do not require the empty air space that 'conventional' PWRs do.
If a normal PWR ever suffers a LOCA with a double ended pipe break (worst case scenario for PWR) all the water will 'instantaneously' flash to steam and there needs to be somewhere for all of the steam to go. That is why containment buildings are so big with so much empty space above the refueling floor. The space allows the steam to expand enough to not blow up the building. Normally it is in the range of 1e6 ft3 of space. Someone got the genius idea of building a nuclear plant on a barge (really!) giving the option of floating the plant to wherever on the coast that the power was needed. So, they needed to come up withways to save size and weight and came up with Ice Condensers. The top and bottom halves of containment are separated by containers with banks of ice that will condense the steam back to water as it expands up, so the excess open space is unnecessary.
According to legend, the original floating plants were to be named Atlantic 1 and 2. Obviously people got smarter somewhere in between concept and construction and they were never built. Unfortunately, they were not smart enough to abandon the design and those of us over 6' tall (some would say 5' tall) and built bigger than your average anorexic teenager have a bit of trouble getting around in the lower containment section. Particularly after the standard outage equipment (scaffolds, spare parts, removed insulation, etc.) have been added. I was working at an Ice Condenser Plant in the early eighties (the decade, not my age) and opened up a gash in my back on a scaffold knuckle, just trying to get from point A to point B.
I am sure that McGuire has redeeming qualities and that others will probably share some. Good luck, and let us know how it goes.