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Initial Construction of the Mayak Plant
- The Soviet Union began construction of a nuclear plant in order to rapidly research and develop nuclear weapons.
- Construction of the plant occurred rapidly over 3 years, and supposedly safety concerns were evident from early on.
- The Mayak plant produced weapon-grade plutonium for nuclear bombs.
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Construction was Finished
- Once the facility was finished, orders were given to produce as much plutonium as possible.
- Due to the rapid production pace, the plant soon ran out of space for nuclear waste.
- Workers started dumping waste in the nearby Techa river.
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Storage Tank for Nuclear Waste Added
- Consisted of steel tanks mounted to concrete.
- The waste created a lot of heat, so coolers were built.
- Monitoring systems for the coolers were inadequate.
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Explosion
- The cooling system for one storage tank failed which resulted in combustion of 70 to 80 tons of radioactive waste (20 million Ci released into the air).
- This explosion contaminated thousands of square kilometers of land.
- The explosion was covered up and the full extent of the event was not known for many years.
- This disaster is ranked as a 6 (serious accident) on the 0-7 International Nuclear Event Scale. This is the only event ranked at 6.
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Initial Evacuation
- Populations of affected areas were not initially informed of the accident.
- 1 week later, 10,000 people were evacuated without explanation.
- Slaughter of livestock was required, in addition to burying crops and plowing farmland.
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Initial Reports in western news
- Initial reports were unfounded and scattered; there was no clarity about what had happened.
- Copenhagen newspaper reported a "catastrophic accident" involving Soviet nuclear weapons.
- 1 year later an Austrian newspaper reported about an accident at a Soviet Atomic Plant.
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Restrictions on farming began
- Restrictions were put in place to reduce radionuclide intake with food products.
- Small farms had to close so that large farms with special conditions and radiation monitoring could take care of meat production,
- Production of grain and vegetables was banned.
- Production of milk was limited.
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East Ural Nature Reserve Established
- This area disguised the "East Ural Radioactive Trace" which was the land area exposure to radioactive contamination.
- About 270,000 people inhabited this area.
- It is now regularly monitored and the population from this area undergoes long-term medical follow-up.
- The evacuated population was provided with new accomodations.
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Zhores Medvedev Dissents and Discloses Extent of Disaster
- 18 years after the accident, Medvedev, a biologist, made the nature of the accident known in a publication in the journal New Scientist.
- Dr. Medvedev reported that the accident killed hundreds and created a wasteland of 400 square miles.
- He termed this the worst nuclear accident in history because it disseminated a larger quantity if Strontium-90 than Chernobyl.
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Soviet Governemnt Publishes Report to UN
- Some details of the accident were included in a report on Chernobyl that was submitted to the UN.
- This report blew the Soviet Union's cover.
- They did however continue to minimize the extent of the damage.
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Study of affected population
- Long-term effects were difficult to assess because of the disaster secrecy and because radioactive waste has been routinely released into the nearby environment for many years.
- Cancer incidence and mortality in the EURT are comparable to Chernobyl clean-up workers and Hiroshima survivors.
- The population has suffered increased rates of cancer, deformities and other major health problems.
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Muslyumovo Residents Finally Relocated
- This village was worst hit by the accident.
- Residents were given a choice of either a new home or a 1 million ruble ($30,000) payout.
- The relocated village was placed only 2 km down the road, still within the contamination zone.
- Residents have other minimal benefits, like $8.50/month for living there and $6.80 for medicines.
- To this day, it is reported that radioactive wastewater is still dumped into ponds around and connected to the Techa River.