Would seem to me that there should be a way, with smaller, standardized designs, to pre-fab most of the precision stuff and just assemble it on site. The things

Would seem to me that there should be a way, with smaller, standardized designs, to pre-fab most of the precision stuff and just assemble it on site. The things that are hard about older designs are the need for very strong, perfectly cast concrete for the high pressure containment vessel, and the high-pressure precision-welded plumbing for the reactor coolant. The nonradioactive steam handling, turbines and electrical generators should be quite similar to what's used in conventional coal/natural gas plants.