Looking at the costs of e.g. Hinkley Point c, this feels right.
I do wonder, though, what the costs would look like if a big country like the US built, say, 400 Hinkley Point Cs. What economies of scale would you see? You could probably get a sense by looking at the marginal build costs were associated with some of the last French plants during the 1970s-early 1990s construction boom, when they built over 50 plans.
Even hydro power can have cost overruns. See the Site C project in British Columbia for example. Massively over budget, yet the province absolutely needs this source of carbon free electricity to support its energy needs in the coming decades.
You can get a rough measurement of the scale effect by comparing Hinkley Point C and Olkiluoto with cost of new VVER plants and time which it takes to build them.
I do wonder, though, what the costs would look like if a big country like the US built, say, 400 Hinkley Point Cs. What economies of scale would you see? You could probably get a sense by looking at the marginal build costs were associated with some of the last French plants during the 1970s-early 1990s construction boom, when they built over 50 plans.