A lot of it is chicken-and-egg problem. New nuclear plants are so rare that they each end up with being slightly different from one another, which adds to regu

A lot of it is chicken-and-egg problem. New nuclear plants are so rare that they each end up with being slightly different from one another, which adds to regulatory requirements. If we started mass producing plants, there would be stronger push for uniformity in design and that would translate into significant cost savings. But no one is going to start mass producing plants because it's so difficult to get just one plant online.