this is nonsense. Take german plants - zero subsidies for operation, plants were built mostly by private sector. In France - no CFD's for existing units, plants were constructed by govt for about 150bn. In comparison Germany spent on EEG subsidies double of that and you can see the result in emissions...
Really? Which private sector built nuclear power plants in East Germany? In West Germany most plants were constructed by state-controlled enterprises and there were no expectation of them to ever reach profitability.