Worst case in the same places where it stores the gigatons of coal ash laced with heavy metals, mercury, cobalt and arsenic - in thousands of open pits or pools

Worst case in the same places where it stores the gigatons of coal ash laced with heavy metals, mercury, cobalt and arsenic - in thousands of open pits or pools all across the place. More realistically, a few big hangars will do until the radioactivity declines in a few dozen years.