Traditional Culture Encyclopedia - Weather forecast - Time of Fukushima nuclear accident
Time of Fukushima nuclear accident
The Fukushima nuclear accident in Japan occurred on March 20 1 1, 12. On this day, an extreme natural disaster occurred in Japan, which led to the equipment failure of Fukushima nuclear power plant, unable to supply power, leading to reactor fission and nuclear leakage.
Fukushima nuclear accident site
On 20 1 1 March 1 1 afternoon 14: 46, a 9-magnitude earthquake occurred in Japan and the sea area, which led to the closure of the reactor11off the coast of Japan. In this earthquake, the Fukushima nuclear power plant interrupted the power supply of the power grid and started the power supply of the diesel engine urgently. But 46 minutes after the earthquake, the earthquake triggered a huge tsunami. It is said that the height of the tsunami reached 14 meters, and the facilities in the whole northeastern part of Japan were destroyed. Seawater rushed into Fukushima nuclear power plant, and the emergency diesel unit was soaked by seawater, which led to line failure and stopped working.
At this time, the Fukushima nuclear power plant can only rely on batteries to power the cooling system. However, due to the limited emergency working time of the battery and the bad weather, the staff in the power station could not take emergency remedial measures for the reactor. After the battery is exhausted, the cooling system stops working and the nuclear reactor heats up rapidly. In the afternoon 15: 36, a hydrogen explosion occurred in the workshop of the power station 1 unit, causing a fire.
In the following days, hydrogen explosions also occurred in 14 and 15, units 3 and 4. At this point, the accident has reached an uncontrollable level. Moreover, it is more difficult to rescue workers on the spot because of the explosion. Some workers risked their lives to enter the scene to put out the fire. But at this time, the fire has caused a nuclear leak.
Until March 25, with the cooperation of many parties, the first fresh water channel was finally established to inject water into the reactor for cooling. On April 12, the Japanese Atomic Energy Safety and Security Agency set the accident level as level 7.
So the time of Fukushima nuclear radiation is from 20 1 1 March 12 to 25, nearly half a month. After the Fukushima nuclear accident, butterflies in this area have changed.
According to the report of August 20 12, the Fukushima nuclear accident in Japan caused butterfly mutation. Researcher AkijiOtaru and his team found that butterflies in Fukushima have small wings and abnormal spots.
Variation of grey butterfly after nuclear accident
At the end of World War II, the United States dropped two atomic bombs on Japan. However, in this incident, more than 654.38+10,000 Japanese suffered from nuclear radiation and developed symptoms such as deformity and cancer. Therefore, in the Japanese concept, the fear of nuclear radiation is more serious than that of any nation in the world.
This time, the main research object is Ranunculus ternatus, which is a butterfly variety that can often be seen in daily life. 20 1 1 In May, Tatsuo and his research team collected 144 butterflies. They trained and raised these butterflies and found that the death rate of gray butterflies in Fukushima was much higher than that in other areas. At the same time, they also found that the closer the gray butterfly is to the radiation center, the higher the mortality rate.
In September of the same year, Zhang collected and studied 240 adult gray butterflies. It is found that more than 50% of the wings of these gray butterflies are smaller than those in other places, and the spots on the wings are asymmetric. This abnormality is 1.5 times higher than that of the parents.
The discovery of butterfly mutation caused by Fukushima nuclear accident caused panic in Japan. They began to fear the "monsters" caused by radiation variation. However, the Japanese authorities issued a statement in this regard, saying that these concerns are unfounded. After all, no one has ever seen a monster caused by radiation. But the harm of nuclear radiation to people and animals is obvious. The consequences of the Fukushima nuclear accident
As a result of the Fukushima nuclear accident, all the offshore areas in Japan have been polluted to varying degrees. In many areas, excessive nuclear pollution was detected in seawater, and the Fukushima nuclear power plant was abandoned as the source of the accident.
Photos of Fukushima nuclear accident scene
A few days after the Fukushima nuclear accident, several ships of the US Seventh Fleet rushed to the disaster area for rescue. Before they arrived at the scene, they detected excessive nuclear pollution in seawater. In order to protect the personal safety of American soldiers, the US government ordered the rescue boat to change course and leave the disaster area on June 5438+05. At the same time, the aircraft carrier ""also left the offshore of Japan and reached the high seas.
With the expansion of the Fukushima nuclear accident, the Japanese government ordered local residents to evacuate on 12. At the same time, the disaster is getting worse. Residents within 30 kilometers of Fiona Fang, centered on the Fukushima nuclear power plant, have been ordered to evacuate. The number of people evacuated this time reached about 300,000.
The water quality of Raohe County, Fuyuan County and Hulin County in Heilongjiang Province was tested in the northeast of China near Japan. The results show that although nuclear pollution has reached the critical point of safety, the State Oceanic Administration and the Environmental Bureau indicated that the data currently obtained is still below the critical point of safety, and this data will gradually decrease with the spread of nuclear radiation.
In Fukushima Prefecture, Japan, data obtained by testing local water quality and plants show that the area has been seriously polluted. Japan issued a statement in this regard, saying that the Fukushima nuclear power plant will be abandoned and will not continue to be used.
It can be seen that the consequences of the Fukushima nuclear accident are limited to Fukushima, Japan, and have not spread. Moreover, with the passage of time, the degree of nuclear pollution will gradually decrease, which will not affect the normal life of surrounding areas and countries.
- Previous article:Jasmine Blossoms Lyric Poetry 400 words
- Next article:What animal is watching the weather forecast?
- Related articles
- Wang Xizhi's information
- Why is there a power outage in Dongguan every day recently?
- Particularly accurate weather applications
- 20 19 Beijing April 1 The weather temperature from Sunday to June is 5438+04.
- It's hot, what medicine can reduce the fire?
- Weather in Chenzhou, Hunan Province in the coming week
- How many educated youths finally returned to the city?
- Where can I fly a kite on the tour?
- How to Cultivate Students' Imagination in Chinese Teaching
- Why do you wake up several times when you sleep every night?