Radiation-eating fungi→

Yeshiva University:

Researchers at the Albert Einstein College of Medicine of Yeshiva University have found evidence that fungi possess a previously undiscovered talent with profound implications: the ability to use radioactivity as an energy source for making food and spurring their growth.

An old story but one that’s just now catching people’s notice, a bit. This is the sort of thing that’d be very useful for long-distance space travel.
Question: how much radiation does it actually consume? Could it be used to clean up Chernobyl-type disasters?