Personnel monitoring radiation levels at Savannah River Site, a facility in South Carolina that once produced parts for nuclear weapons, found a radioactive wasp nest in July. While this might sound like the start of a science fiction horror movie, officials say it does not present a danger to the public.

The hazardous insect abode was located near a set of tanks filled with liquid nuclear waste, although the team didn’t detect any leaks. Instead, experts believe the nest set off Geiger counters through what’s known as “onsite legacy radioactive contamination.