The world’s worst nuclear power accident What happened? Chain reaction in the reactor became out...
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Transcript of The world’s worst nuclear power accident What happened? Chain reaction in the reactor became out...
![Page 1: The world’s worst nuclear power accident What happened? Chain reaction in the reactor became out of control creating explosions and a fireball which blew.](https://reader036.fdocuments.us/reader036/viewer/2022062314/56649dc55503460f94ab9154/html5/thumbnails/1.jpg)
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The world’s worst nuclear power accident
What happened?Chain reaction in the reactor became out of control creating explosions and a fireball which blew off the reactor's heavy steel and concrete lid.
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• This happened on April 26, 1986
• It happened in the former USSR (now Ukraine)
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• This happened because many safety procedures were ignored
• This was the result of a bad reactor design that was operated with poorly trained personnel and without proper regard for safety.
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• Chernobyl Nuclear Power Plant, April 26, 1986- the routine 20-second shut down of the system seemed to be another test of the electrical equipment. But seven seconds later, a surge created a chemical explosion. The total power of the explosion was estimated to be more than 100 times that of the atomic weapons used in World War II.
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• The force of the explosion spread contamination over large parts of the Soviet Union, now the territories of Belarus, Ukraine and Russia.
• According to official reports, thirty-one people died immediately and
• 600,000 more involved in fire fighting and clean-up operations, were exposed to the high doses of radiation.
• Based on the official reports, near 8,400,000 people in Belarus, Ukraine and Russia were exposed to the radiation, which is more than the population of Austria.
• About 155,000 sq. km of territories in the three countries were
contaminated, which is almost half of the total territory of Italy.
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• The RBMK-type reactor, like all other nuclear reactors, uses nuclear fission to split nuclei, releasing energy.
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• The reactor was scheduled to shut down for maintenance. While preparing for the shutdown, the operators wanted to perform a test to see how long the turbines could run the emergency cooling system if power is interrupted by an accident. THIS WAS A BAD THING!!
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• Firefighters were the first emergency personnel on the scene
• About 30 rough fires had to be extinguished, including fires on the roof of Reactor No. 3 which was still running
• When radiation levels began to reach extreme highs, the order was given to evacuate cities, towns and villages near the damaged reactor
• Radioactive particles had to be cleaned from buildings and roads
• Many movable objects were buried in concrete pits • The medical on-site response was minimal • The nurses station at the site was found deserted and even
locked
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Sanitation engineer cleaning up the mess
What it looked like after explosion!
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Before The Accident
After The Accident
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Special chemicals were sprayed on
streets to immobilize radioactive particles
to prevent further contamination.
German workers wash down a truck on its arrival to the border between East and West Germany after the discovery of radioactive contamination.
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Any contaminated dirt near the destroyed
nuclear power station had to be removed. The corridor of a
hospital in Moscow, with
victims of radiation.
One of the first
calves to experience
mutations. This calf has a cleft
lip.