> 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.

NIMBYism is a large reason why the risks are so uncertain and the costs so high. When dozens of judges at several levels have jurisdiction to require expensive and time consuming state/federal EPA, zoning, air quality, shading, etc. reviews and plaintiffs can use delay tactics to block appeals to those rulings, you get lots of uncertainty and expense.