Natural disasters such as hurricanes and ** are not controllable by humans, but some deadly disasters on the earth are man-made disasters caused by human beings. In pursuit of more energy, food and building materials, humans are depleting the planet's resources, and the resulting long-term effects threaten ecosystems and people themselves.
The site of the Chernobyl nuclear accident.
The Chornobyl nuclear power plant was the first nuclear power plant built in Ukraine during the Soviet era, in 1973. It was once considered the safest and most reliable nuclear power plant in the world.
However, on April 26, 1986, the No. 4 nuclear reactor of the nuclear power plant suddenly caught fire during a semi-baking experiment, causing **, and it is estimated that the radioactive contamination produced after the nuclear accident is equivalent to 100 times the radioactive contamination produced by the atomic bomb ** in Hiroshima, Japan. ** The unit was completely damaged, more than 8 tons of strong radioactive material leaked, and dust drifted away with the wind, causing many regions of Russia, Belarus and Ukraine to be contaminated by nuclear radiation.
This is the worst nuclear accident ever!
By 2006, official statistics showed that more than 4,000 people had died so far.
But Greenpeace, based on data from the Belarusian National Academy of Sciences, found that over the past 20 years, more than 9 million victims of the Chernobyl nuclear accident could die at any time. Therefore, Greenpeace believes that the official results are at least 90,000 fewer than the death toll from the Chernobyl nuclear accident, which is 20 times the official figure!
Deaths:9.30,000 ; Number of carcinogens: 270,000
Children exposed to nuclear radiation.
The accident drew public attention to the safety of the Soviet Union's nuclear power plantsIndirectly led to the collapse of the Soviet Union
After the collapse of the Soviet Union, countries that became independent, including Russia, Belarus and Ukraine, still devote money and manpower to the aftermath of disasters and the health care of their populations every year.
The number of people who die directly or indirectly from accidents is difficult to estimate, and the long-term effects of accidents remain unknown so far.
Cause of the event:
The root cause of this nuclear accident was that the nuclear power plant staff did not communicate well with each other when conducting an experiment. At that time, the staff was going to carry out an overhaul of the fourth nuclear reactor, and when the reactor was shut down, the plant management decided to conduct an experiment to see if the inertial rotation of the turbine could generate new electricity when the reactor was shut down and the vapor no longer transmitted energy to the turbine generator.
However, Kyiv Energy was unaware of the experiment, and one of the energy companies ordered the reactor team to start the fourth nuclear reactor immediately. The turbine generator working group, which was not yet unaware, had shut down the turbines. The steam produced by the reactor is supplied to the turbine, and when the turbine is turned off, the reactor is automatically shut down by the automatic protection system. However, the turbine generator working group had already cut off the automatic protection system before doing the experiment. So the reactor constantly works to produce steam, but there is no outlet for catharsis, triggeredThermal energy**
Forbidden land now:
More than 30 years later, everything that happened in Chernobyl is still vivid. In this small city today, there is still a lot of radiation. In the dilapidated residential houses, the clothes, toys and furniture with radiation, the tables and the scattered dust on the floor, everything tells of the disasters and misfortunes of the year.
Today's scene tells the tragic situation of the year.
Today's Chernobyl 4 reactor, where most of the nuclear fuel remains in the ruined nuclear power plant, is covered by a huge concrete vault, known as the "sarcophagus".
Sarcophagus appearance. Man-made catastrophe: the Chernobyl nuclear accident
As for the Soviet Union, selfishness, ignorance, panic and concealment will not help us overcome the catastrophe, as one of the people involved in the investigation of the accident once said: ".The most dangerous thing about Chernobyl is by no means cesium and plutonium, but a lie。"Disasters are always lurking in unknown places, maybe it is a virus infection, maybe it is a nuclear leak, we can never completely avoid it, but fortunately, there are experts in various fields and the masses to provide early warning for mankind. When disaster strikes, a word of truth may save the lives of tens of thousands of people.