A radioactive cloud to drifted over western Europe in November. French detectors picked up the faint signs of the radioactive ruthenium 106, and traced it back to some kind of incident in Russia or Kazakhstan.
There was a fear in France that mushrooms sourced in the location may have made their way into the wild mushroom market, and carry a slight radioactive risk.
We all know that mushrooms manage to hoover up radioactive contaminants very readily, as witnessed at Fukushima in Japan.
The release was probably from a fuel treatment site or from a centre for radioactive medicine.
Interestingly, Rosatom, the Russian nuclear operator said it had detected nothing.
However since then, a report by the Russian meteorological service Roshydrome, has said two stations in the southern Ural mountains found "extremely high pollution" of the radioactive isotope between September and October.
