Used to be true. Not anymore.
Our GAO (Cour des Comptes) has published an all-comprenhensive study on the french civilian nuclear program (hidden costs not taken into account) and it is as follows:
-nuclear power plants dismantling costs
-waste/hazardeous materials management
-new safety standards to be implemented (following Fukushima accident)
Total cost since 1945 (research & investments) = 170 billion eur
Hiddent costs to be added in the future = 80 billion eur
These hidden costs are evaluated to a 10% increase on our electricity bill. Still more competitive than any electricity price one would pay elsewhere in Europe.
The whole study is available on the French GAO website:
http://www.ccomptes.fr/index.php/Pub...ectronucleaire