I think as well as the obvious connection to nuclear warfare, part of the public fear of nuclear technology comes directly from how highly radioactive objects mimic the idea of a "curse".
In reality there's many forms of industrial pollution that are arguably scarier than nuclear waste, but none are quite so eerie in how their harm is caused. Even though it represented the very worst practices for these materials, the idea of a place like Lake Karachay where even half an hour on its shore would have killed you without you even knowing you were doomed is really unsettling. I don't think nuclear technology should be avoided, but there's definitely a formidable image problem here I think.
Chemical pollution is a lot scarier in a way, since it's much harder to detect. Even absolutely tiny amounts of radioactive contamination its existence to cheap widely available detectors. But I think chemical pollution is easier to ignore since it's harder to detect.
A lot of chemical pollution lasts literally forever, too. It's kind of funny the way the mind works. "This will remain dangerous for ten thousand years" somehow sounds scarier than "this is always dangerous."
In reality there's many forms of industrial pollution that are arguably scarier than nuclear waste, but none are quite so eerie in how their harm is caused. Even though it represented the very worst practices for these materials, the idea of a place like Lake Karachay where even half an hour on its shore would have killed you without you even knowing you were doomed is really unsettling. I don't think nuclear technology should be avoided, but there's definitely a formidable image problem here I think.