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DISASTER MANAGEMENT
Russia confirms 'extremely high' readings of radioactive pollution
by Staff Writers
Moscow (AFP) Nov 20, 2017


Russia's meteorological service confirmed on Monday "extremely high" concentrations of the radioactive isotope ruthenium-106 in several parts of the country in late September, confirming European reports about the contamination this month.

"Probes of radioactive aerosols from monitoring stations Argayash and Novogorny were found to contain radioisotope Ru-106" between September 25 and October 1, the Rosgidromet service said.

The highest concentration was registered at the station in Argayash, a village in the Chelyabinsk region in the southern Urals, which had "extremely high pollution" of Ru-106, exceeding natural background pollution by 986 times, the service said.

The isotope was then detected in Tatarstan and then in southern Russia, eventually reaching "all European countries starting in Italy and toward the north of Europe" from September 29, Rosgidromet said.

It did not point to any specific source of the pollution, but the Argayash station is about 30 kilometres from the Mayak nuclear facility, which in 1957 was the site of one of the worst nuclear disasters in history.

Today Mayak is a reprocessing site for spent nuclear fuel.

On November 9, France's Institute for Radioprotection and Nuclear Safety (IRSN) issued a report saying ruthenium-106 had been detected in France between September 27 and October 13.

It said that the source of the pollution was probably an accident somewhere between the Volga River and the Ural Mountains, adding that the concentrations measured in Europe were not a danger to public health.

Ruthenium-106 is a product of splitting atoms in a reactor, and is also used in certain medical treatments. It does not occur naturally.

Russia's nuclear corporation Rosatom said at the time that "radiation around all objects of Russian nuclear infrastructure are within the norm and are at the level of background radiation".

France's IRSN had said a nuclear reactor could not have been the source of the Ru-106 since other radioactive elements would also have been detected.

It suggested instead that a discharge from an installation linked to the nuclear fuel cycle or which produced radioactive materials as the cause of the radioactive cloud.

Greenpeace Russia on Monday called on Rosatom to open "an in-depth inquiry and publish the results about the incidents at Mayak".

"Greenpeace will send a letter asking prosecutors to open an inquiry into potential concealment of a nuclear incident," it said in a statement.

In mid-October, Rosatom had issued a statement cited by Russian media outlets saying "in samples tested from September 25 to October 7, including in the southern Urals, no trace of ruthenium-106 was found, except in Saint Petersburg".

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A brand-new theory of the opening moments during the Chernobyl disaster, the most severe nuclear accident in history, based on additional analysis is presented for the first time in the journal Nuclear Technology, an official journal of the American Nuclear Society. The new theory suggests the first of the two explosions reported by eyewitnesses was a nuclear and not a steam explosion, as ... read more

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