The website Gridwatch makes real-time data available on UK electricity output - I recently discovered French data on there too! You can access it here. France's grid is dominated by nuclear but has a large quantity of electricity exports and imports. The data below are from 20/11/2014 16:45
to 28/05/2017 7:45, local French time.
The chart below shows output by fuel type over the period. Enjoy!