Ruthenium 106 has been detected by several European networks involved in the monitoring of atmospheric radioactive contamination, at levels of a few milliBecquerels per cubic meter of air.
So far, IRSN calculations, based on the concentration levels measured in several European countries and on the meteorological conditions of the last few days, seem to indicate that the contamination air could have been generated from southern regions of Ural or located close to those. IRSN is continuing its investigations to try to confirm the origin of this atmospheric pollution.