[pedrocr]

There are nuclear power plants capable of throttling up and down at will. Not all designs work like that but some do.

[akvadrako]

Really? Are you talking about a tiny fraction of operating plants?

[pedrocr]

I think it's pretty common. I'm not an expert but I think most of France's grid is run that way. Wikipedia has a few details:

https://en.wikipedia.org/wiki/Load_following_power_plant#Nuc...