Yes, i understand it very well

The problem is you framed it as

1- not being able to cool reactors physically, which is false

2- being a major deal, when it affects only 0.2% of generation per year, during a period when EDF is net exporting about 14GW to the neighbors

3- being an unfixable issue, which is again false. The problem exista for reactors without cooling towers. EDF can fix it by building them. But there's no financial incentive here. Where would EDF sell extra power when export is already maximized in that same timeframe and market prices in summer are low?