Not really. While it is true that we have not been building nuclear reactors in the last 40 years (and that, therefore, all knowledge is basically lost, leading to the insane delays we're seeing in the EPR), this is mostly a political maneuver to win the ecologist vote. Hollande closing down Fessenheim when it was good for an additional 20 years at the very least is a prime example of the clownery at the head of this country.