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Urals nuclear disaster 1957

NUCLEAR DISASTER IN THE URALS. KYSHTYM ACCIDENT  https://sherbrooktimes.com/nuclear-disaster-in-the-urals-kyshtym-accident/12112   

On 29 September 1957 at 16 o’clock on the territory of the chemical plant “Mayak”, which was in the closed city of Chelyabinsk-40 (now Ozersk), was the first in the USSR radiation accident — an explosion of capacity to store radioactive waste. The catastrophe was called the Kyshtym accident — the name closest to Chelyabinsk-40 by city.

The blast occurred in containers, of a capacity of 300 m? because of the failure of the cooling system. In the tank contained a total of about 80 m? highly radioactive nuclear waste. At the time of construction in 1950-ies the strength of the structure is not in doubt. She was in the pit, in a concrete shirt thickness meter.

Cover the container weighed 560 tons, over it was laid a two-meter layer of earth. However, even this failed to contain the explosion.

According to another, unofficial version, the accident occurred due to human error of the plant that in the tank-evaporator with hot plutonium nitrate solution by mistake added a solution of plutonium oxalate. The oxidation of oxalate nitrate allocating a large amount of energy, leading to overheating and explosion of the tank.

During the explosion in the atmosphere were about 20 million curies of radioactive substances, some of which rose to a height of up to two miles, and formed an aerosol cloud.

Over the next 11-12 hours of radioactive fallout on the territory with a length of 300-350 km on northeast from the explosion.

In the area of radioactive contamination got 23 thousand km2 with a population of 270 thousand people in 217 settlements of the Chelyabinsk, Sverdlovsk and Tyumen regions. During the liquidation of consequences of the accident were required to relocate 23 villages with a population of 10-12 thousand a man, all the buildings, property and livestock were destroyed.

Liquidators were hundreds of thousands of soldiers and civilians

Only in the first ten days the number of deaths from radiation have gone on hundreds, during the works in varying degrees, suffered 250 thousand liquidators.

According to the international scale of nuclear testing accident was estimated at six points. For comparison, the seventh level, the maximum was rated accidents at Chernobyl and Fukushima-1.

To avoid scattering of radiation by government decision was established the sanitary-protective zone in which economic activity was banned. In 1968 this territory was formed of the Eastern Ural state reserve.

It is forbidden to visit — the level of radioactivity is still too dangerous for humans.

October 6, 1957 in the newspaper “Chelyabinsk worker” appeared devoted to his note, in which, however, about the accident not a word was said:

On Sunday night… many residents of Chelyabinsk watched the special glow of a starry sky. It’s pretty rare in our latitudes, the glow had all the signs of the Aurora. Intense red, time moves to slightly pink and light blue glow first covered a large part of the South-Western and North-Eastern surface of the firmament. About 11 o’clock it was possible to observe in the North-Western direction… In the sky appeared a relatively large colored area and the quiet lanes that had at the last stage of lights North-South direction. The study of the nature of the Aurora, has begun Lomonosov continues in our days. Modern science has confirmed the basic idea of the University, that the Aurora occurs in the upper layers of the atmosphere by electrical discharges of the Aurora…… can be observed in the future at the latitudes of the southern Urals”.

Kyshtym accident has long been a state secret. For the first time openly about her was said in a shot at the turn of the 1980s and 1990s, the film Director and biologist Elena Sakanyan, dedicated to the fate of Soviet genetics and biologist Nikolai Timofeev-Ressovsky.

The films were shown on television only after Sakanyan directly asked about the show to Boris Yeltsin.

But in the foreign press leaked the information in April 1958. For the first time about the accident said one of the Copenhagen Newspapers. Subsequently, information about the accident appeared in the report of the National laboratory, USA, biologist Zhores Medvedev dedicated incident book entitled “Nuclear disaster in the Urals”, published in the US, an analysis of the causes of the accident and its causes held by a group of American scientists from the atomic center at oak ridge.

“About the explosion at the “Mayak” for long periods of time, the public knew almost nothing. Later, for some reason, the accident was replicated in the media as the “Kyshtym accident”.

In Kyshtym on this occasion, even recently, was the obelisk, although the city to this event is irrelevant.

And the East-Ural radioactive trail, formed after 1957, did not affect Cistema and its residents,” — said in an interview in 2009, one of its liquidators.

Only the “Lighthouse” there were more than 30 incidents of radioactive emissions and human victims.

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October 4, 2017 - Posted by | history, Reference, Russia

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