The cost of new nuclear powerplants is obviously not a relevant argument for turning existing nuclear power plants off prior to the end of their design life. That money has already been spent, the concrete poured, the steel forged, ect, and you dont get a refund.

Secondly: Paying private investors doubledigit returns on low carbon infrastructure in the current economic and climatic situation, regardless of type is.. gah. I dont have polite words.
That is not an argument against nuclear, it is an argument against our entire financial framework for building infrastructure.