Fukushima nuclear power plant exploded radiation over 9 times the normal, 190 were affected by radiation

Pm local time on 12 March 15, Fukushima Nuclear Power Station Unit 1 of the first explosion was heard inside, and white smoke came out, causing four people were injured, and cause the roof of Unit 1 plant collapse occurred outside the wall off phenomenon. Alleged cause of the explosion may be hydrogen explosion, not a nuclear explosion. The government has ordered the first nuclear power plant in Fukushima evacuated surrounding residents to expand the range of 10 km from the radius to radius of 20 km.


1, 9 times the normal radiation intensity over

March 11 afternoon, after the earthquake, the first nuclear power plant in Fukushima reactor automatically stopped.

However, the earthquake caused the power interruption nuclear power plant control systems, nuclear reactor cooling system were forced to stop working. And there are still a large number of reactor decay heat, once the cooling system failure, the reactor temperature and pressure will rapidly increase, may lead to the reactor core melting furnace, resulting in nuclear accident.

12 morning, from the Japan Atomic Energy Institute of the safety, security sources said Unit 1 of Fukushima alternate cooling system failure, near the intensity of radioactive radiation is 1000 times more than the normal standard, nuclear power plants outside the radiation intensity exceeds the normal standard of 8 to 9 times This means that the leakage of radioactive material have been.

A few hours later, the second nuclear power plant a few miles away from the standby cooling system stops operating, two nuclear power plants within 3 km radius of the people were evacuated after the turn radius of the Government of Japan extended to 10 km.

Japanese security officials said the reactor steam after filtering, only a small amount of radioactive material, will not pose a threat to the environment and human health, they will wind floated proliferation.

2 explosions caused by high concentrations of hydrogen

However, the 12 around 15:30 pm, an explosion of Unit 1, four workers were injured. NHK television screen you can see the explosion of Unit 1 plant after almost all of the external walls collapsed, leaving only the steel skeleton. Explosion may result in excessive concentrations of hydrogen.

Unit 1 then detected near the radioactive cesium and iodine. Cesium is a nuclear reactor uranium fuel for nuclear fission of the material. Nuclear Safety Security Court officials said this: "that the reactor core fuel is melting." Another official said the first nuclear power plant in Fukushima current release of radiation per hour, equivalent to the highest standards throughout the year the total amount of nuclear radiation.

Local media said, because of the wind direction is westerly, the explosion of the dust was blown sea, with the radioactive dust is not spread to the Japanese inland. 18:00 pm on the news that No. 1 unit detected outside the radiation intensity declined. A few hours later, the authorities decided to first nuclear power plant in Fukushima scope of further expansion of the surrounding residents to evacuate to a radius of 20 km. It is reported that the number of local evacuation of 10 million.

3190 or by radiation

12 evening, according to Japanese media reports, Fukushima Prefecture disaster countermeasure headquarters announced that the Ministry of Health hospital that night to double leaves more than 90 patients, confirmed that three members of the public by the nuclear radiation, must be immediately for emergency treatment.

The three are alleged and the other patients waiting together in the Self-Defense Force helicopter near the power plant was nuclear radiation. However, the latest television station NHK reported that they suffered radiation level 3 is not serious, just a "clean" on the line.

12 evening 22 o'clock, according to media reports, according to the headquarters of disaster response Fukushima latest statistics, Fukushima Futaba-cho, who has been diagnosed to have suffered nuclear radiation up to 190 people.

Japan's Ministry of Health has sent a medical team to emergency first nuclear power plant in Fukushima, diagnosis and treatment of people who may be subject to nuclear radiation. The team of doctors, nurses and radiation experts. They have been on at 8:00 on the 12th take off the military helicopter from the Tokyo suburbs.

4 nuclear power plant cooling problems encountered

According to nuclear experts, the nuclear reactor cooling system relies on electricity to pump the cooling power to obtain, but Fukushima local power network has been severely damaged by the tsunami, making the cooling system lost power. Fukushima nuclear power stations have been equipped with emergency diesel engines, but the Fukushima nuclear power plant first and second backup system is damaged. In addition to the standby system, nuclear power plants as well spare batteries, the operator is to restore the backup battery coolant unit No. 1, but the batteries only last 8 hours.

Japan Nuclear and Industrial Safety Agency officials said they had found more battery and transported by military helicopter to the Fukushima nuclear power plant. SDF chemical warfare troops are sent rushed to the scene on standby. Tokyo Fire Department has sent an elite rescue team to the Fukushima nuclear power plant. U.S. forces also sent military transport aircraft, for delivery of special cooling Fukushima nuclear reactor cooling fluid.

Japan's defense minister said Kitazawa handsome, a chemical expert has been sent to this nuclear power plant.

5 units will be scrapped nuclear power plant accident

To reduce the pressure of the reactor vessel, Tokyo Electric Power Company started the evening of 12 fire pumps, direct injection to the reactor cooling water. Safety and Security Institute of Atomic Energy announced the evening of 12, into the water to the reactor after the meltdown of fuel rods has been initially curbed. University of Tokyo Graduate School Kosa Gu Min Chuang pointed out that after the sea water into the reactor, Unit 1 is almost impossible to use again.

In addition, the Fukushima nuclear power plant has also lost the second cooling, Tokyo Electric Power Company has begun the release of the nuclear power plant Units 1 and 2, water vapor inside the reactor vessel to reduce pressure inside the container, to prevent even greater damage. The company is also preparing to release the other two reactors in nuclear power plant steam.

Fukushima nuclear power plant around the first and second Futaba-cho, Bear Town, Tomioka-cho 12, all residents began the morning of the designated danger zone to shelter a total of about 2 million people.

According to Tokyo Electric Power Company determined local time 18:58, the first nuclear power plant in Fukushima radiation dose within the region has dropped to 70.5 per hour, slightly West, previously observed only about one seventh of the maximum dose, but the radiation dose still far beyond the normal.

Posted in: 8.8 Earthquake japan tsunami,Japan earthquake