chernobyl accident

Download Chernobyl accident

If you can't read please download the document

Author: azize

Post on 10-Jan-2016

66 views

Category:

Documents


5 download

Embed Size (px)

DESCRIPTION

Chernobyl accident. The Chernobyl disaster was a catastrophic nuclear accident that occurred on 26 April 1986 at the Chernobyl Nuclear Power Plant in Ukraine (then officially the Ukrainian SSR), which was under the direct jurisdiction of the central authorities of the Soviet Union. - PowerPoint PPT Presentation

TRANSCRIPT

Chernobyl accident

Chernobyl accident

The Chernobyl disaster was a catastrophic nuclear accident that occurred on 26 April 1986 at the Chernobyl Nuclear Power Plant in Ukraine (then officially the Ukrainian SSR), which was under the direct jurisdiction of the central authorities of the Soviet Union. An explosion and fire released large quantities of radioactive particles into the atmosphere, which spread over much of the western USSR and Europe.

The Chernobyl disaster is widely considered to have been the worst nuclear power plant accident in history, and is one of only two classified as a level 7 event (the maximum classification) on the International Nuclear Event Scale (the other being the Fukushima Daiichi nuclear disaster in 2011).

he battle to contain the contamination and avert a greater catastrophe ultimately involved over 500,000 workers and cost an estimated 18 billion rubles.31 people died during the accident itself, and long-term effects such as cancers and deformities are still being accounted for.

On 26 April 1986, at 01:23 (UTC+3), reactor four suffered a catastrophic power increase, leading to explosions in its core. This dispersed large quantities of radioactive fuel and core materials into the atmosphere and ignited the combustible graphite moderator.

The burning graphite moderator increased the emission of radioactive particles, carried by the smoke, as the reactor had not been encased by any kind of hard containment vessel.

The accident occurred during an experiment scheduled to test a potential safety emergency core cooling feature, which took place during a normal shutdown procedure.

27 years after Chernobyl accident continuous influence of small doses of radiation continue to influence negatively the nature in a 30-kilometer special zone round nuclear power plant became less birds and insects (the radiation level is higher, the there are less than insects)

2006 the American non-profit Bleksmit's Institute research organization published the list of the most polluted places on a planet in which Chernobyl appeared in the first ten.

Thanks for attention!!!