They have discovered naturally occurring nuclear reactions in rock formations. There is also the issue of radio active radon gas. My point is more that radiat

They have discovered naturally occurring nuclear reactions in rock formations. There is also the issue of radio active radon gas. My point is more that radiation hazards exist naturally on earth. A carefully constructed handful of man made ones doesn't feel like it changes the risk profile all that much. https://www.scientificamerican.com/article/ancient-nuclear-reactor/ https://www.scientificamerican.com/article/ancient-nuclear-r...