This winter my home city had a power supply crisis. It was night time (I live in a high latitude so nights last a long time during winter) which meant no solar, and it was -30C, which meant the wind turbines all shut down (they can't operate when it's below -30C). The whole province was short of power, only the coal and natural gas plants were keeping the lights on. We dodged rolling blackouts but it was a close thing. Lots of people live here.
Bring down the nuclear level
Which is perfectly fine. Nuclear power plants can change how much power they're putting out. It's not "economic waste", the term is "load-following power plant" and it's routine for nuclear power plants.