The handling of nuclear waste is only one aspect of nuclear power safety. One critical challenge is that reactors must be constantly cooled, even through natural disasters, power outages, attacks by former sister states, etc.

The Fukushima designers thought they'd accounted for anything that could possibly happen. Backup diesel generators? Check. Tsunami barrier? Check. Unfortunately none of that mattered when the design expectations were exceeded.

It's going to take some more innovative thinking to design disaster-proof (Fukishima), madman proof (Zaporizhzhia) and human-error-proof (Chernobyl, Three Mile Island) reactors to satisfy future power demands.