Not really. You're talking about a fungus creating essentially a nuclear reactor inside of its cells, and creating it out of fuel that's not good enough to make a nuclear reactor in the first place (it at one time was, but now it's a mess of decay products and nonsense).
Reactors also take a certain amount of mass. You can't just squish two tiny microgram particles together and hope to get anything going.
Technically I guess I can't prove it wouldn't work if you make it dense/hot/covered-in-reflectors enough, but I'm pretty sure it's _well_ beyond the limits of what a fungus could even conceivably do.
Note that the only numbers on that page have various critical masses in kg. That's a bigass fungus.
And that's still not getting into: the "fuel" here is real shit. It's gotta be beyond its useful life even if you ignore that the thing melted down and corroded and blew up.
Not really. You're talking about a fungus creating essentially a nuclear reactor inside of its cells, and creating it out of fuel that's not good enough to make a nuclear reactor in the first place (it at one time was, but now it's a mess of decay products and nonsense).
Reactors also take a certain amount of mass. You can't just squish two tiny microgram particles together and hope to get anything going.