alt Hacker NewsNuclear doesn't really solve this particular problem - solar is already cheaper than nuclear, so no one is going to replace their entire solar capacity with nuclear. And nuclear doesn't spin up/down rapidly like natural gas, so its a lousy solution for nighttime.
This is just wrong. Nuclear is perfectly fine for nighttime because nighttime is highly predictable and doesn't fluctuate very much.
My state (NSW, Australia) for example uses no less then 6 GW at all times of day. Variable load is on top of that during the day.
If we had 6GW of nuclear plants, our grid would be almost completely green and they'd run at 100% utilization.