Another cost that you don't mention is the cost of waste disposal. As far as I am informed no single country has yet found a safe, clean and cost-effective solution for nuclear waste disposal (correct me if I'm wrong here).
If that is true this means that the cost estimation of all the reactors that we have until now are false and until now we do not even know what it will cost us in the future to "clean up the mess".
Nearly ever country with nuclear power (except the US) processes the 'waste' since only a small portion of it is actual waste. Most of it is U-238 (harmless). Some is useful - plutonium, and isotopes that are used in medicine. Only a tiny amount is harmful and unusable radioactive material that needs to be contained and buried.
You can thank the Carter administration for this blunder.
Because it's not really a pressing problem. Spent nuclear waste can sit in a swimming pool of water for any amount of time without endangering anyone. And water is so good at shielding radiation that you can even swim in such a pool. After few years the waste is moved to outside casks which are also not a danger to anyone. The only real problem is protecting those places from terrorists and such. But then again we have burnt coal ash sitting in huge piles outside under clear sky, and I would argue they pollute a lot more than a spent nuclear fuel cask does.
I hope that I am just hysterical and there is some solution planned since long time, and maybe there is totally no danger at all and we can continue for long time enjoying sea products from the channel.
But absolutely no one is dumping nuclear waste into the sea at the moment. It's something that has been done decades ago, so why would it be stopping us from using nuclear power nowadays?
Don't get me wrong - we've done huge damage to the environment by dumping our waste into seas, lakes and just general carelessness. But using that as an argument to stop using nuclear power now is.....illogical?
If that is true this means that the cost estimation of all the reactors that we have until now are false and until now we do not even know what it will cost us in the future to "clean up the mess".