The power outage isn't tied to inflation (through the price is tied to inflation, as electricity price is tied to gas price). It's something only happening in France.

It's a combination of bad luck (we need to do some emergency repair in a few reactors), Covid quarantine preventing the routine repairs the last few years, the cold weather greatly increasing our energy consumption (a large chunk of the french heating is electric), and lack of investment in our nuclear capacity since... around 1997 I think.