Similar to the curse of the Pyramids of Egypt, a myth/belief of ray-cats was developed in the 1980s to keep people away from nuclear waste repositories. If people in the future(10 thousand years later) see a glowing cat, they’ll know to back off from that place, therefore backing away from the nuclear repository and avoiding radioactivity.

By instilling a sense of fear or reverence around the waste site through superstition or religious beliefs, the priesthood aims to deter future populations from approaching the danger.

By telling a story, by instilling a belief in its audience, experts of this project managed to keep people away from possible danger.

https://www.theatomicpriesthoodproject.org/