France is balancing their reactors with a massive amount of water power, so they are not doing it alone on the reactor side. But I think France is indeed one of

France is balancing their reactors with a massive amount of water power, so they are not doing it alone on the reactor side. But I think France is indeed one of the countries with the highest relative amount of nuclear in the grid. Germany went never over 30% nuclear in the mix, so demand matching was way less of a problem. But also, both countries tried to make demand mostly constant like with pushing inefficient heating systems which would consume electricity at night. This is very far off from working well together with a mostly renewable grid, where renewables can cover 100% of the load on most days, but there are larger gaps to be quickly filled.