Chernobyl accident (Chernobyl), located near the eponymous town in Ukraine, was the biggest accident in the history of nuclear power.It happened April 26, 1989.Destruction of the fourth unit triggered the release of a variety of products of nuclear fission isotopes.Air masses blew them a considerable distance.Radioactive isotopes have been found on the border with Russia and Belarus, as well as in several other countries.
The day before the crash NPP workers planned a project testing the security system of the fourth power.During the tests, there were difficulties associated with managing the reactor.April 26 at about one in the morning there was a sharp increase in uncontrolled power, because of whi
ch was the destruction of the fourth power.
In the following days, attempts to deactivate radioactive isotopes with special substances, but they are to no avail.The temperature in the reactor cavity, for unknown reasons began to increase, triggering an even greater release of radioactive substances into the atmosphere.
More than 8 million people, including citizens of Belarus, Russia and Ukraine, suffered radiation exposure.Almost 400 thousand residents of nearby areas to Chernobyl were urgently evacuated.Affected farmland.
accident at Japanese nuclear power plant Fukushima-1 occurred on 11 March 2011.This accident is considered to be the biggest disaster in the nuclear power plant after the infamous Chernobyl.
Unlike the Chernobyl nuclear power plant accident at the Fukushima-1 is not linked to the failure of units.On that day, Japan was struck by a 9-magnitude earthquake that triggered a tsunami occurrence.The giant wave covered diesel generators, which are necessary to control the cooling system, and led them out of action.
temperature inside the first, second and third reactor beginning to grow rapidly, and nuclear fuel - to melt.Accumulation of vast quantities of hydrogen provoked a strong explosion.This accident was given the highest degree of danger.Large areas have been infected with the radioactive isotope cesium.The content of hazardous substances in the coastal waters of a million times higher than normal.More than 150 thousand people were evacuated from the area of infection.
territory within a radius of 20 km from Fukushima for decades would be unsuitable for life.Today you can meet only people that eliminate the consequences of the terrible accident.