[jabl]

> You mean they lose operational efficiency ?

Historically, one of the few successful ways to lower the price per generated power from a nuclear power plant has been to make the reactor larger. So yeah, there's a reason why the latest traditional PWR designs such as the French EPR are huge (1600 MWe).

The gamble with these small reactors like Nuscale is that series production of the reactors in a factory would make up for the loss of the traditional economy of scale due to size. It remains to be seen how well that will work out.