Chernobyl

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Presentation transcript:

Chernobyl

What caused the Chernobyl Disaster? In the early morning of 26 April 1986, one of the four reactors at the Chernobyl nuclear power station ran out of control while engineers were running safety tests. Within four seconds, a power surge of 100 times normal output led to a violent explosion and fire. The 1,000 tonne concrete top of the reactor building was blown off and huge chunks of blazing, radioactive material were blasted into the air like a volcanic explosion. The reactor burned furiously and highly radioactive debris was scattered around and inside the reactor building.

What caused the Chernobyl Disaster? The reactor burned for a week, spewing out radiation, and was eventually put out by helicopters dumping tonnes of sand, and fire fighters and site works fighting the blaze. Hundreds of thousands of people, many of them soldiers, were drafted in to clean up the site. They had very little in the way of protective clothing and were only allowed into the reactor building for 90 seconds at a time. They were called the ‘liquidators’. The clean-up work continued for two years as the entire reactor building was sealed in a huge concrete tomb-like structure known as the Sarcophagus.

The monument to the “Liquidators” who lost their lives putting out the fires

Where is Chernobyl? Chernobyl is about 1,500 miles from Britain, 60 miles north of Kiev, capital of the Ukraine in Eastern Europe. Now an independent country, in 1986 the Ukraine was part of the Soviet Union. Just to the north is the international border with Belarus, then also part of the Soviet Union. Belarus was to be the country worst affected by the disaster. The nuclear power station was Soviet designed and built.

What happened to those nearby? Direct casualties of the explosion were rushed off to hospitals as far away as Moscow. Then it became clear that because of the intense radioactive fallout, all the surrounding population would have to be evacuated – 14,000 people. Police surrounded Pripyat, the nearest town (2.5km away), set up road blocks and prepared to deal with any panic.

On Sunday 27 April, at 1.50pm, local radio announced the start of a mass evacuation. At 2pm, 1,100 buses began to pick up the 40,000 residents. Almost all belongings had to be left behind. Sunday lunches were left on tables, pets and livestock abandoned. By 4.20pm the town was empty. In all, more than 110,000 men, women and children were evacuated from surrounding areas.

Illnesses and deaths Immediately after the accident about 30 people died but this was just the beginning of the deaths, illnesses and changes to DNA Although it is impossible to say with certainty that a particular cancer has a particular cause, statistics imply that the accident at Chernobyl has had a catastrophic effect on the populations of nearby areas. There had been up to the year 2002 about 4,000 cases of thyroid cancer reported in children and adolescents who were exposed at the time of the accident, and more cases can be expected during the next decades.