The world

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What was the Chernobyl Disaster?

• The worlds 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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When and Where did this happen?

• This happened on April 25-26, 1985
• It happened in the former USSR (now Ukraine)

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Why did this happen?

• 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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How did this happen?

• 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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How many people died or were hurt?

• 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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What is a reactor

• The RBMK-type reactor, like all other nuclear
  reactors, uses nuclear fission to split nuclei,
  releasing energy.

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April 25, 100 am

• 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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EMERGENCY

• 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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What it looked like after explosion!
Sanitation engineer cleaning up the mess
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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.