I'm wondering why there is no measurement, no data about the radiation detected. All in our environment is a little bit radioactive, it's called background radiation : <a href="https://en.wikipedia.org/wiki/Background_radiation#:~:text=Background%20radiation%20is%20a%20measure,deliberate%20introduction%20of%20radiation%20sources" rel="nofollow noreferrer">https://en.wikipedia.org/wiki/Background_radiation#:~:text=B...</a>.
A scientific article without any reference to measurements or at least a comparison with background radiation is criticisable. I'll say the obvious but, it the legal limit is near to the background radiation level, all became not safe. Anyway, what about the truffles and other mushrooms of that region ? For logic deduction, they should be unsafe, too.