Guidance: The nuclear power plant in Fukushima Prefecture in Japan has the Fukushima Daiichi Nuclear Power Plant and the Fukushima Daiichi Nuclear Power Plant, all of which are operated by Tokyo Electric Power Company. In 2007, TEPCO acknowledged that since 1977, in a total of 199 regular inspections of its three nuclear power plants, the company had tampered with data and concealed security risks. Among them, the data measured by the main steam pipe flowmeter of the No. 1 unit of the Fukushima Daiichi Nuclear Power Plant was tampered with 28 times in succession from 1979 to 1998.
Tokyo Electric Power Co., Ltd. said on the 12th that due to the impact of the earthquake, explosions were heard and white smoke was emitted in Unit 1 of the Fukushima Daiichi Nuclear Power Station that afternoon. Four people were injured in the accident and they were initially identified as hydrogen explosions for cooling.
According to reports from the Central Television Station, a new explosion occurred at the Fukushima Daiichi Nuclear Power Station later.
The Atomic Energy Safety and Security Institute of Japan’s Ministry of Economy, Trade and Industry previously confirmed that the radioactive material at the Fukushima Daiichi nuclear power plant leaked to the outside.
On the evening of the 12th, the Japanese government expanded the evacuation radius around the nuclear power station from the original 10 kilometers to 20 kilometers. Japan’s Fukushima Prefecture announced on the evening of December 12 that radioactive materials had been found on three of the people who had taken refuge within a radius of 3 kilometers from the Fukushima Daiichi nuclear power plant.
Japanese Prime Minister Naoto Kan took a helicopter from the Ground Self-Defense Forces yesterday morning to inspect the Fukushima Daiichi nuclear power plant and the earthquake-stricken area. Naoto Kan urged the people to remain calm and vowed to "ensure people's health is not threatened."
At around 15:30 local time, an explosion was heard inside the building of Unit 1 of the Fukushima Daiichi Nuclear Power Plant and the roof collapsed. White smoke emerged after about 10 minutes. It was alleged to feel violent shaking before hearing the explosion. The four workers who performed maintenance work at the scene were fractured and bruised. They were conscious and did not endanger their lives.
Tokyo Electric Power Co., Ltd. said that it was initially identified as a hydrogen explosion with cooling.
World Nuclear Industry Federation official Lexiy inferred: "This is obviously an explosion caused by the burning of hydrogen." May not increase the leakage of radioactive material.
The TV screen shows that the roof and the wall of a building in the nuclear power station were lost, leaving only the “metal frameâ€. It is not clear if the reactor is in this building.
Japanese Prime Minister Yukio Yoshino said on the evening of the 12th that the container of the No. 1 unit of the Fukushima Daiichi Nuclear Power Station installed itself was not damaged in the afternoon explosion.
Yukio Masano said at a press conference that the explosion caused the building's walls to collapse, but it was not the explosion of the reactor's containers inside the building. As for the cause of the accident, Yukio Chino said that the water vapor generated from the core of the reactor leaked out of the container, and the generated hydrogen reacted violently with the oxygen in the building, causing an explosion.
According to a measurement by Tokyo Electric Power Co., at 18:58 local time, the radiation dose in the Fukushima Dai-ichi nuclear power plant area has dropped to 70.5 microsieverts per hour. Only about one-seventh of the maximum dose was observed before, but radiation was observed. The dose is still much higher than normal.
Only a "metal frame" left after the collapse of the exploding roof
Before the explosion occurred, the Japanese authorities confirmed for the first time that radioactive materials from the nuclear power plant had leaked to the outside.
The Atomic Energy Safety and Security Institute said in a statement that the Tokyo Electric Power Company’s Fukushima Daiichi nuclear power plant, which was automatically shut down due to the 11th-day earthquake, had its radiation level at the central control room of Unit 1 reach 1,000 times its normal value. The latest communique said that the amount of radiation near the gate of this nuclear power plant continued to rise, reaching 90% of the normal level at 9:10 am on the 12th.
For the first time, Japan took nuclear power plants to open valves to release emergency steam relief measures. Although this measure may also lead to the leakage of radioactive materials to the external environment, this can prevent the container from being damaged and cause the nuclear power plant to lose its closed function.
Japan’s Minister of Economy, Trade and Industry Haejeon Wanri stated that according to prior assessments, even if radioactive material is released, it will be insignificant. The security agency pointed out that because the government has decided to expand the shelter area and the wind direction is blowing to the sea, it can ensure the safety of the residents.
Japan’s Fukushima Prefecture announced on the evening of December 12 that radioactive materials had been found on three of the people who had taken refuge within a radius of 3 kilometers from the Fukushima Daiichi nuclear power plant.
Radiation found on 3 people leaking out of shelter The Ministry of Economy, Trade and Industry of Japan’s Atomic Energy Safety and Security Agency announced on the 12th that some fuel rods had melted down in the reactor. This is the first nuclear fuel melt accident in Japan's nuclear power plant.
The Fukushima Daiichi nuclear power plant is currently facing cooling problems. The Japanese authorities are trying their best to carry out the "cooling down" process.
On the evening of the 12th, Tokyo Electric Power Company injected seawater into the Unit 1 reactor to cool down. Experts believe that the unit will be difficult to restart.
One of the serious consequences of the inability of the reactor to effectively cool down is that the core melts, causing leakage of radioactive material. This phenomenon occurred in the United States in 1979 when the accident occurred in the Sanli Island nuclear power plant. The accident caused radioactive gas to be scattered into the atmosphere, seriously affecting the health of the surrounding people.
In accordance with the operational requirements of nuclear power plants, the core cooling system has higher stability and shock resistance than ordinary industrial refrigeration systems and must meet the anti-Lei 8 earthquake, anti-nuclear radiation, anti-aging, anti-pressure, and long-term use. 30 years and other demanding requirements. However, the magnitude of the earthquake in Japan was close to 9 on the Richter scale, and the seismic design capability of some old nuclear power plant cooling systems was difficult to cope with such an earthquake.
Difficulties in the partial melting of nuclear fuel are trying to find ways to cool the current Japanese government has announced two nuclear power plants in Fukushima "nuclear energy emergency." According to statistics, the number of people who need to be transferred immediately within a short period of time reaches 80,000.
As a result of the explosion, the Japanese government also increased the evacuation radius around the Fukushima Daiichi nuclear power plant that night and asked neighboring residents to withdraw from the radius of the nuclear power plant within 20 kilometers. The refuge radius of the second nuclear power plant is still maintained at 10 kilometers.
The local TV station recommends that residents farther away from the nuclear power plant should not go out, turn off the air-conditioning, and do not drink tap water; and, when going out, try to avoid exposing the skin and cover the face with a mask or wet towel.
The Japanese government announced on the 12th that the Tokyo fire department has sent a "super rescue team" to the Fukushima Daiichi nuclear power plant. Japan’s Radiation Medicine Research Institute, which is responsible for the treatment of the wounded, has also urgently convened all medical personnel.
Defense Minister Kitazawa Kitazumi issued the highest directive to the Self-Defense Forces: "Do everything possible to evacuate the residents at any cost." Land SDF anti-chemical units are rushing to the disaster area. The escorts and large transport ships of the Maritime Self-Defense Forces are gathering on the sea near the nuclear power plant and are preparing to evacuate the residents near the nuclear power plant from the sea.
According to the Japanese Police Agency, as of 3:45 pm yesterday, 800 residents of the Fukushima Daiichi Nuclear Power Plant had still not withdrawn within 10 km radius.
The Japanese Chief Cabinet Secretary Yukio Yoshino acknowledged that because there were multiple villages around the first nuclear power station hit by the tsunami, communications and roads were interrupted and no contact could be established.
Evacuation sent “Super Rescue Team†80,000 people to transfer the Fukushima Nuclear Power Plant News Background Fukushima Nuclear Power Plant The nuclear power plant in Fukushima Prefecture, Japan has the Fukushima Daiichi Nuclear Power Plant and the Fukushima Daiichi Nuclear Power Plant, both of which are operated by Tokyo Electric Power Company. The reactors of the two nuclear power plants are boiling water reactors using ordinary water as a coolant and neutron moderator. Compared with pressurized water reactors, this reactor is simpler in construction and safer. Before the major earthquake, a total of seven reactors at the Fukushima Daiichi and No. 2 nuclear power plants were in operation, and all were automatically shut down after the earthquake.
The Fukushima Daiichi and No. 2 nuclear power plants also had accidents several times before. There was a borderline accident at the Fukushima Daiichi Nuclear Power Plant in 1978, but the accident was concealed until 2007 when it was announced.
In 2006, radioactive material leakage occurred on Unit 6 of the Fukushima Daiichi Nuclear Power Plant.
In 2007, TEPCO acknowledged that since 1977, in a total of 199 regular inspections of its three nuclear power plants, the company had tampered with data and concealed security risks. Among them, the data measured by the main steam pipe flowmeter of the No. 1 unit of the Fukushima Daiichi Nuclear Power Plant was tampered with 28 times in succession from 1979 to 1998.
Tokyo Electric Power Co., Ltd. said on the 12th that due to the impact of the earthquake, explosions were heard and white smoke was emitted in Unit 1 of the Fukushima Daiichi Nuclear Power Station that afternoon. Four people were injured in the accident and they were initially identified as hydrogen explosions for cooling.
According to reports from the Central Television Station, a new explosion occurred at the Fukushima Daiichi Nuclear Power Station later.
The Atomic Energy Safety and Security Institute of Japan’s Ministry of Economy, Trade and Industry previously confirmed that the radioactive material at the Fukushima Daiichi nuclear power plant leaked to the outside.
On the evening of the 12th, the Japanese government expanded the evacuation radius around the nuclear power station from the original 10 kilometers to 20 kilometers. Japan’s Fukushima Prefecture announced on the evening of December 12 that radioactive materials had been found on three of the people who had taken refuge within a radius of 3 kilometers from the Fukushima Daiichi nuclear power plant.
Japanese Prime Minister Naoto Kan took a helicopter from the Ground Self-Defense Forces yesterday morning to inspect the Fukushima Daiichi nuclear power plant and the earthquake-stricken area. Naoto Kan urged the people to remain calm and vowed to "ensure people's health is not threatened."
At around 15:30 local time, an explosion was heard inside the building of Unit 1 of the Fukushima Daiichi Nuclear Power Plant and the roof collapsed. White smoke emerged after about 10 minutes. It was alleged to feel violent shaking before hearing the explosion. The four workers who performed maintenance work at the scene were fractured and bruised. They were conscious and did not endanger their lives.
Tokyo Electric Power Co., Ltd. said that it was initially identified as a hydrogen explosion with cooling.
World Nuclear Industry Federation official Lexiy inferred: "This is obviously an explosion caused by the burning of hydrogen." May not increase the leakage of radioactive material.
The TV screen shows that the roof and the wall of a building in the nuclear power station were lost, leaving only the “metal frameâ€. It is not clear if the reactor is in this building.
Japanese Prime Minister Yukio Yoshino said on the evening of the 12th that the container of the No. 1 unit of the Fukushima Daiichi Nuclear Power Station installed itself was not damaged in the afternoon explosion.
Yukio Masano said at a press conference that the explosion caused the building's walls to collapse, but it was not the explosion of the reactor's containers inside the building. As for the cause of the accident, Yukio Chino said that the water vapor generated from the core of the reactor leaked out of the container, and the generated hydrogen reacted violently with the oxygen in the building, causing an explosion.
According to a measurement by Tokyo Electric Power Co., at 18:58 local time, the radiation dose in the Fukushima Dai-ichi nuclear power plant area has dropped to 70.5 microsieverts per hour. Only about one-seventh of the maximum dose was observed before, but radiation was observed. The dose is still much higher than normal.
Only a "metal frame" left after the collapse of the exploding roof
Before the explosion occurred, the Japanese authorities confirmed for the first time that radioactive materials from the nuclear power plant had leaked to the outside.
The Atomic Energy Safety and Security Institute said in a statement that the Tokyo Electric Power Company’s Fukushima Daiichi nuclear power plant, which was automatically shut down due to the 11th-day earthquake, had its radiation level at the central control room of Unit 1 reach 1,000 times its normal value. The latest communique said that the amount of radiation near the gate of this nuclear power plant continued to rise, reaching 90% of the normal level at 9:10 am on the 12th.
For the first time, Japan took nuclear power plants to open valves to release emergency steam relief measures. Although this measure may also lead to the leakage of radioactive materials to the external environment, this can prevent the container from being damaged and cause the nuclear power plant to lose its closed function.
Japan’s Minister of Economy, Trade and Industry Haejeon Wanri stated that according to prior assessments, even if radioactive material is released, it will be insignificant. The security agency pointed out that because the government has decided to expand the shelter area and the wind direction is blowing to the sea, it can ensure the safety of the residents.
Japan’s Fukushima Prefecture announced on the evening of December 12 that radioactive materials had been found on three of the people who had taken refuge within a radius of 3 kilometers from the Fukushima Daiichi nuclear power plant.
Radiation found on 3 people leaking out of shelter The Ministry of Economy, Trade and Industry of Japan’s Atomic Energy Safety and Security Agency announced on the 12th that some fuel rods had melted down in the reactor. This is the first nuclear fuel melt accident in Japan's nuclear power plant.
The Fukushima Daiichi nuclear power plant is currently facing cooling problems. The Japanese authorities are trying their best to carry out the "cooling down" process.
On the evening of the 12th, Tokyo Electric Power Company injected seawater into the Unit 1 reactor to cool down. Experts believe that the unit will be difficult to restart.
One of the serious consequences of the inability of the reactor to effectively cool down is that the core melts, causing leakage of radioactive material. This phenomenon occurred in the United States in 1979 when the accident occurred in the Sanli Island nuclear power plant. The accident caused radioactive gas to be scattered into the atmosphere, seriously affecting the health of the surrounding people.
In accordance with the operational requirements of nuclear power plants, the core cooling system has higher stability and shock resistance than ordinary industrial refrigeration systems and must meet the anti-Lei 8 earthquake, anti-nuclear radiation, anti-aging, anti-pressure, and long-term use. 30 years and other demanding requirements. However, the magnitude of the earthquake in Japan was close to 9 on the Richter scale, and the seismic design capability of some old nuclear power plant cooling systems was difficult to cope with such an earthquake.
Difficulties in the partial melting of nuclear fuel are trying to find ways to cool the current Japanese government has announced two nuclear power plants in Fukushima "nuclear energy emergency." According to statistics, the number of people who need to be transferred immediately within a short period of time reaches 80,000.
As a result of the explosion, the Japanese government also increased the evacuation radius around the Fukushima Daiichi nuclear power plant that night and asked neighboring residents to withdraw from the radius of the nuclear power plant within 20 kilometers. The refuge radius of the second nuclear power plant is still maintained at 10 kilometers.
The local TV station recommends that residents farther away from the nuclear power plant should not go out, turn off the air-conditioning, and do not drink tap water; and, when going out, try to avoid exposing the skin and cover the face with a mask or wet towel.
The Japanese government announced on the 12th that the Tokyo fire department has sent a "super rescue team" to the Fukushima Daiichi nuclear power plant. Japan’s Radiation Medicine Research Institute, which is responsible for the treatment of the wounded, has also urgently convened all medical personnel.
Defense Minister Kitazawa Kitazumi issued the highest directive to the Self-Defense Forces: "Do everything possible to evacuate the residents at any cost." Land SDF anti-chemical units are rushing to the disaster area. The escorts and large transport ships of the Maritime Self-Defense Forces are gathering on the sea near the nuclear power plant and are preparing to evacuate the residents near the nuclear power plant from the sea.
According to the Japanese Police Agency, as of 3:45 pm yesterday, 800 residents of the Fukushima Daiichi Nuclear Power Plant had still not withdrawn within 10 km radius.
The Japanese Chief Cabinet Secretary Yukio Yoshino acknowledged that because there were multiple villages around the first nuclear power station hit by the tsunami, communications and roads were interrupted and no contact could be established.
Evacuation sent “Super Rescue Team†80,000 people to transfer the Fukushima Nuclear Power Plant News Background Fukushima Nuclear Power Plant The nuclear power plant in Fukushima Prefecture, Japan has the Fukushima Daiichi Nuclear Power Plant and the Fukushima Daiichi Nuclear Power Plant, both of which are operated by Tokyo Electric Power Company. The reactors of the two nuclear power plants are boiling water reactors using ordinary water as a coolant and neutron moderator. Compared with pressurized water reactors, this reactor is simpler in construction and safer. Before the major earthquake, a total of seven reactors at the Fukushima Daiichi and No. 2 nuclear power plants were in operation, and all were automatically shut down after the earthquake.
The Fukushima Daiichi and No. 2 nuclear power plants also had accidents several times before. There was a borderline accident at the Fukushima Daiichi Nuclear Power Plant in 1978, but the accident was concealed until 2007 when it was announced.
In 2006, radioactive material leakage occurred on Unit 6 of the Fukushima Daiichi Nuclear Power Plant.
In 2007, TEPCO acknowledged that since 1977, in a total of 199 regular inspections of its three nuclear power plants, the company had tampered with data and concealed security risks. Among them, the data measured by the main steam pipe flowmeter of the No. 1 unit of the Fukushima Daiichi Nuclear Power Plant was tampered with 28 times in succession from 1979 to 1998.
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