France's 2017 nuclear generation is well below record levels:

https://www.platts.com/latest-news/electric-power/london/fra...

According to S&P Global Platts calculations based on reactor availability, output is unlikely to reach 380 TWh this year.

Based on cumulative output of 361 TWh by December 17, output would need to average 56.5 GW over the final two weeks in 2017 to even reach 380 TWh, the TSO data-based calculations shows.

Nuclear output averaged just below 50 GW so far this December, up from 42 GW in November, the data shows.

...

EDF operates France's 58 nuclear reactors. But following record production years in 2014 and 2015 at 416 TWh, it has struggled with extended outages and lower nuclear production.

France has always been investing in nuclear energy, https://en.m.wikipedia.org/wiki/Électricité_de_France