Russia reports radioactivity 986 times above normal after claims of nuclear accident
Weeks after French
nuclear watchdog IRSN reported a mysterious cloud of radioactive material over
Europe, Russian authorities have confirmed that “extremely high” levels of the
isotope ruthenium-106 were found in several parts of the country. Experts and analysts
believe the ruthenium-106 detected in Europe was possibly released by accident
from a Russian site engaged in chemical reprocessing of old nuclear fuel or a
facility producing isotopes used in nuclear medicine.
The Russian
Meteorological Service said in a statement on Tuesday that it recorded the
release of ruthenium-106 in the southern Urals in late September and classified
it as “extremely high contamination”. The highest
concentration was registered in Argayash, a village in Chelyabinsk region in
the southern Urals, which had levels of the isotope exceeding natural
background pollution by 986 times, the service said. “Probes of radioactive
aerosols from monitoring stations Argayash and Novogorny were found to contain
radioisotope Ru-106” between September 25 and October 1, the service said. It
added the isotope was detected in Tatarstan and southern Russia, eventually
reaching “all European countries, starting in Italy and toward the north of
Europe” from September 29.
After an
investigation, France’s Institut de Radioprotection et de Surete Nucleaire
(IRSN) concluded the “most plausible zone of release (of the radioactive
material) lies between the Volga (river) and the Urals”. It had also said the
levels recorded in Europe were of “no consequence for human health and for the
environment”. Following the initial
reports, Russia’s state-controlled Rosatom corporation had said in a statement
last month that the radiation had not come from its facilities.
The Argayash station
referred to by the Russian Meteorological Service is about 30 km from the Mayak
nuclear facility, which was the site of one of the worst nuclear disasters in
history in 1957. Mayak is now a reprocessing site for spent nuclear fuel. Greenpeace Russia on
Monday called on Rosatom to open “an in-depth inquiry and publish the results
about the incidents at Mayak”, according to The Guardian. “Greenpeace will send
a letter asking prosecutors to open an inquiry into potential concealment of a
nuclear incident,” it said in a statement.
Ruthenium-106 is a
radioactive isotope that is a by-product of a nuclear reaction and it is not
found in nature. It is also used in certain medical treatments. “It’s an unusual
isotope,” Anders Ringbom, research director of the Swedish Defence Research
Agency, was quoted as saying by NPR. “I don’t think we have seen it since the
Chernobyl accident.”