Also I wonder what happens to the nuclear plants. Many were build 30-50 years ago based on proven (old) technology. If you shut them down, they need to be cooled a considerable time. If you not shut them down, they need water in their reactor at all times.

In fukushima they shutdown the cores and then lost power, leading to blowing up some of them because of low water isssues or cooling issues, and no automatic venting.