TFA is factually wrong on many counts.
The main reason we don't get new reactors in most european countries are political, not economical. In fact, power companies are doing fine and nuclear power is highly subsidized, mostly indirectly. New plants are expensive only on paper.
But the political culture has moved many countries into a very strange corner. Because the public dislikes nuclear power and wants it gone, but politicians don't (bribery, lobbyism, desire for energy-independence or wisdom in planning the future carefully - make your pick), you cannot get permission to build a new plant in many countries, but you can keep your old one running and extend its lifetime.
The second reason is economic, but of a different kind: Since these plants were originally designed for 20-30 years, which are long past, their value in the financial statement is 1 Euro. Which gives them incredibly cute key figures - they look really good in financial analysis. Actually, in reality too, because due to stupid/bought laws, the government will pay for large parts of the waste disposal, and the amount companies need to pay into a fund to pay for deconstruction is, by many experts opinion, only a fraction of what is needed. But once they actually deconstruct most of the plants, the game is up. Like any good scam, you need to keep it going as long as possible.
So thanks to management-think in both politics and business, we have some of the oldest nuclear power plants in the world, right next to some very large cities.
And, btw., I like nuclear power. I wouldn't mind having the old plants replaced by modern ones. But I agree with the anti-nuclear-power people that right now, we have the worst possible solution.