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Chernobyl: 20 Years Later

Chernobyl: 20 Years Later. 1986: The year of the accident. 26 April 1986, 1:23:00: A test of the cooling system begins in unit no. 4 of the Chernobyl power plant 26 April 1986, 1:23:40: The emergency shutdown fails.

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Chernobyl: 20 Years Later

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  1. Chernobyl: 20 Years Later

  2. 1986: The year of the accident • 26 April 1986, 1:23:00: A test of the cooling system begins in unit no. 4 of the Chernobyl power plant • 26 April 1986, 1:23:40: The emergency shutdown fails. • 26 April 1986, 1:23:44: The reactor in unit no. 4 runs out of control and explodes.

  3. Why? • Design flaws • Lack of containment shell • Positive void coefficient • Graphite moderator • Dangerous experiment

  4. Immediate Soviet Reaction • Unprepared officials at a local and national level exacerbated the problem • Firefighters who went to put out the graphite fire were not told of lethal radiation levels • Eventually the government acknowledged the disaster and ordered the evacuation of nearby Pripyat

  5. The Sarcophagus • A hastily-built concrete and steel structure • Placed around the remains of Reactor 4 • Shoddy construction; extremely unstable • Plans are underway for a new, more permanent building

  6. 26 April to 4 May 1986: • Most of the radiation was released in the first ten days. • At first, northerly and northwesterly winds predominated. At the end of April the wind switched to the south and southeast. There were frequent but local showers. • This resulted in a very varied regional and local distribution of the radiation.

  7. Health and Physiological Consequences • Increase in thyroid cancer • Increase in other types of cancer • Chronic Illness

  8. A young thyroid cancer patient awaiting treatment at a center in Kiev After radiation therapy

  9. Psychological Consequences • Anxiety • Depression • Helplessness and despair leading to social withdrawal and loss of hope for the future. • Other disorders attributable to mental stress

  10. Environmental Effects

  11. Food and Other Restrictions

  12. Image Sources http://www.belarusguide.com/chernobyl1/chfacts.htm http://news.bbc.co.uk/2/hi/health/382979.stm http://www.chernobyl.info/index.php?userhash=15475450&navID=3&lID=2 http://www.chernobyl.info/index.php?userhash=15475450&navID=4&lID=2 http://www.uic.com.au/nip22.htm http://www7.nationalgeographic.com/ngm/0604/feature1/gallery1.html http://www7.nationalgeographic.com/ngm/0604/feature1/gallery5.html http://en.wikipedia.org/wiki/Chernobyl_disaster_effects http://www.chernobyl.in.ua/im/sarcophagus/elephants%20foot.jpg http://www.chernobyl.in.ua/en/red_forest/1 Text Sources http://en.wikipedia.org/wiki/Chernobyl_disaster http://www.chernobyl.co.uk/ http://www.uic.com.au/nip64a.htm http://www-formal.stanford.edu/jmc/progress/chernobyl.html http://www.chernobyl.info/index.php?userhash=15475450&navID=4&lID=2 http://news.bbc.co.uk/2/hi/health/382979.stmhttp://www.who.int/mediacentre/news/releases/2005/pr38/en/index.html http://www7.nationalgeographic.com/ngm/0604/sights_n_sounds/index.html http://www.chernobyl.in.ua/en/red_forest/1 http://www.greenfacts.org/chernobyl/index.htm Sources

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