We have the engineering. In a real sense that is the problem. For any particular complication we can come up with designs and systems that handle and control

We have the engineering. In a real sense that is the problem. For any particular complication we can come up with designs and systems that handle and control that. But each and every one such complication whether it is a coating or a backup cooling system or whatever adds up. Ideally nuclear power could be cheap, and it is conceivable that with enough design effort invested we could get there. Unfortunately even the modern simplified designs are not cost competitive with solar, wind, and hydro.