No, solar is about 100€/MWh without subsidies. Indeed, the one big problem remaining with wind and solar is constant supply over the day. But the larger the connected grids are, the better this balances out. While a nuclear power plant delivers a constant output 24/7 (this is also not ideal as we are lacking consumption in the late evening and night, thats why Belgium put lights onto their highways), nuclear power plants regularly get pulled of the grid entirely, if there is a technical problem. A new one should of course have less downtimes than an older one, but one needs to plan in a certain amount of replacement capacity.