[adrianN]

France has over fifty nuclear plants, most of them older than 40 years. You probably want to replace most of them in the next twenty years or so. Since building one can easily take a decade or two from planning to power output, you would want to have a couple of dozen in the planning stage right now if you expect to continue producing the same amount of power. Since only about a third of France's primary power consumption is satisfied by nuclear, realistically they'd need to drastically increase the number of reactors in the next decades to reach climate goals.