The majority of the cost to build the plants are due to the crazy uncertainty about the design/build timeline every-time one is built. Given that conceptually they aren't any more complex than your average coal plant those costs are massively over inflated by a number of factors. Frankly if there was a COTS design pre-certified, then it might be possible to wipe out a huge fraction of the built cost.
The majority of the cost to build the plants are due to the crazy uncertainty about the design/build timeline every-time one is built. Given that conceptually they aren't any more complex than your average coal plant those costs are massively over inflated by a number of factors. Frankly if there was a COTS design pre-certified, then it might be possible to wipe out a huge fraction of the built cost.