Related: How do we warn future civilizations about the danger of our nuclear waste? This has been studied and I always found it interesting: How to build a nuclear warning for 10,000 years’ time https://www.bbc.com/future/article/20200731-how-to-build-a-n...
In 10,000 years most the the really dangerous nuclear waste would have decayed. In addition, nuclear waste is a local problem. It won’t magically spread to a large area.
Cadmium, lead, arsenic would probably all be more dangerous than 10,000 year old nuclear waste.