This is what I found "In 2020, France exported a total of nearly 78 terawatt hours of electricity. Meanwhile, electricity imports to France amounted to nearly 35 terawatt hours in total that year."
nuclear is only useful for base load you cant shutdown a reactor in hours, thats why france imports a lot of gas (the same goes for germany, its the fastest way to scale energy, burn more gas, its even easier than with coal.)
France is by far the leader when it comes to the fraction of electricity produced by nuclear reactors; however it never ever could phase out fossil fuels, nor could or can do it at a realistic cost.
This is what I found "In 2020, France exported a total of nearly 78 terawatt hours of electricity. Meanwhile, electricity imports to France amounted to nearly 35 terawatt hours in total that year."
Source: https://www.statista.com/statistics/1279015/france-electrici...