Once the safest nuclear power plant in the world, 1986 leaked on April 26th. During the semi-baking experiment, Chernobyl reactor 4 caught fire and caused an explosion. The radiation produced by nuclear power is 100 times that of Hiroshima atomic bomb in Japan. More than 8 tons of radioactive materials leaked, and dust drifted with the wind, which brought great pollution to Russia, Belarus and Ukraine.

Many fertile land has been polluted, and 2.5 million people in Ukraine have suffered from various diseases due to the sequelae caused by the leakage of nuclear power plants. Among them, there are 473,000 children. The impact of this disaster on the natural environment is at least 100 years, and radioactive materials will last for 100 years. The leakage of nuclear power plants brought losses to the Soviet Union thousands of years ago as high as $654.38+000 billion.

Two or three mile island nuclear accident

This is the worst nuclear accident in America. 1in the early morning of March 28th, 979, radioactive material leaked from the No.2 reactor of Sanli Nuclear Power Station in the southeast of Harrisburg, Pennsylvania, USA, resulting in nuclear pollution within 80km around. The cause of the accident was that a water pump tripped, which led to the interruption of water supply on the secondary side of the steam generator.

Three. Fukushima nuclear power plant accident in Japan

On April 3, 20 1 1, cracks appeared in the shell of reactor 2 of Fukushima Daiichi nuclear power plant in Japan, which was the main reason for the leakage of a large number of radioactive materials. At that time, the accident handlers sealed the 20 cm crack with cement, but radioactive pollutants still leaked out. The reason is that the cement is washed away by the constant sewage. The sewage discharged from the crack is four times the safety standard. At the beginning, nuclear power workers also hoped to stick cracks with substances similar to glue. However, the storage failed, resulting in the leakage of 7 tons of radioactive wastewater, and two employees were sprayed with nuclear power sewage.

After the accident, TEPCO said it would take full responsibility for the nuclear leakage. In fact, the Fukushima nuclear power plant had the same safety accident as early as 1978, but it was not made public until 2007. After the accident, all the people around the nuclear power plant were evacuated, and a large amount of radioactive materials flowed into the Pacific Ocean, causing some fish to mutate and leaving radioactive materials on their bodies.

Extended data:

The effects of nuclear radiation on people;

Nuclear leakage affects people's general situation. In nuclear radiation, it is also called radioactive material. Radioactive substances can be inhaled through breathing, absorbed by skin wounds and digestive tract and enter the body, causing radiation in the body. Gamma radiation can penetrate a certain distance, be absorbed by human body, and make people hurt by external radiation.

After people are exposed to nuclear radiation, nausea and vomiting will occur within a few hours, and then symptoms such as diarrhea and headache will appear. There may also be an asymptomatic period, but more serious symptoms will appear after a few weeks. In the case of high radiation dose, these symptoms may appear earlier, and half of healthy adults can't bear the radiation dose of 4 Gy. The radiation used by people in radiotherapy is about 1-7 Gy. But the height can be controlled, and it is effective in a small range.

Radiation is the most dangerous thing that causes cancer. Radiation causes cells not to become new cells, but only to produce cancer cells. Some radiation will not cause cancer, but it will change genes, leading to inheritance in the next generation, resulting in acute or serious congenital diseases in newborn babies.

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Baidu Encyclopedia-Fukushima Nuclear Accident

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