If bioaccumulation hasn't posed a problem yet, it doesn't seem to be too much of a concern.
The dose rate near Chernobyl has fallen 2 orders of magnitude. Further, now the vast majority of the activity is Cs-137, which is excreted pretty quickly. Further, the waste is getting buried and further removed from the food chain (though Russia recently stirred up soil there, which isn't ideal).
The dose rate near Chernobyl has fallen 2 orders of magnitude. Further, now the vast majority of the activity is Cs-137, which is excreted pretty quickly. Further, the waste is getting buried and further removed from the food chain (though Russia recently stirred up soil there, which isn't ideal).