alt Hacker NewsPV solar is between $.97 and $1.16 per watt, so that's going to be the front line. With storage you can get from $1.60 to $2. This is already the bulk of the power generation in Europe and is only going to increase. The idea that you're going to run nuclear plants at 95% capacity factor economically is also very suspect in a continent saturated with cheap PV solar.
US NREL Puts it at $2/W with no storage and ~20% capacity factor. Lifetime of latest panels is unknown but optimistically is 25 years. Assuming perfect and free storage that comes to $24.4 billion per year of capital expenditure for a country the size of France to be 100% solar. So no, it would not be more economical to use solar over nuclear. Wind would be better but when you add the full system costs of storage and backup intermittent heavy systems are vastly more expensive and emit more carbon than nuclear ones. https://discussion.fool.com/t/levelized-full-system-costs-of...
Intermittents are only gaining market share because their unreliable and intermittent power which is less valuable is being purchased by governments at prices that far exceed what it is worth. In other words, massive hidden subsidies. Without those, there would be next to no intermittents on the grid anywhere.
See “Market matching costs” here: https://en.wikipedia.org/wiki/Cost_of_electricity_by_source