Grim two nuclear reactors in Japan may be permanently buried
Local 2011 March 12, Japan’s NHK television station broadcast the first nuclear power plant in Fukushima No. 1 nuclear reactor at 9:00 am and 4:30 pm of the combination of map drawing, the figure only the explosion of the unit frame (painted yellow circle at) . local time on March 12, 2011, Futaba-cho, Fukushima Prefecture in Japan, affected by the earthquake , Fukushima nuclear power plant leaks radioactive material, smoke coming from the unit.
Zhongguang Wang Tokyo on March 14, according to Voice of China “News” reported today 9 earthquake in Japan has entered the fourth day, with the aftershocks of the ease, the Japanese are beginning to affected areas the rescue and self-help work. As of 10 pm yesterday, Japanese police confirmed the death toll has risen to 2,100, about 20,000 people missing, the current shelter facilities throughout Japan more than 45 million people have taken refuge. But with the confirmation of the victims and the rescue work continues to start, will determine the number of deaths increased substantially.
Japan is now the latest situation? Let’s connect Japan Tokai University Mr. Ye Qianrong.
Moderator: We also noticed an oil refinery explosion last night, the current situation how? There is continued Fukushima No. 1 nuclear power plant reactors, the first external hydrogen explosion occurred after the last night there have been 3 reactor core melt of the problem, the present situation is under control, the possibility of an explosion, how much?
Ye Qianrong: Yesterday Miyagi have a refinery explosion, conflagration ignited onto the sky. Currently the fire is not under control, the fire still burning. After the earthquake, there have been refinery tank fire that almost no particularly good way.
present the most serious still is the first nuclear power plant in Fukushima Prefecture III Unit 1 and unit issues.
Unit 1 after an explosion yesterday afternoon, the government has taken the way into the cooling water, cooling water was inside the reactor cooling water level is rapidly increasing, and submerged nuclear fuel rods, temperature, pressure has the decline. However, in 4 pm yesterday, found that the cooling water level 1.7 m above the fuel rods, which is a very dangerous problem, because higher fuel rods in the cooling water temperatures of 1000 degrees, wrapped in radioactive material outside the zirconium fuel rods , zirconium oxide of this material will occur, and then, after contact with water in a large amount of hydrogen. The day before yesterday a large number of explosive hydrogen gas savings is one of the reasons, and this phenomenon appeared again.
At the same time, although there is no explosion, but after the injection of water, cooling water level III unit has not been picked up the same phenomenon also occurred, there is a lot of hydrogen, and the water level below the fuel rods, as much as 2 meters. Currently continues to drive a water perfusion, while perfusion in the study of why the water does not go in, why the water level is not increased. One explanation is that the pressure inside the reactor is too high, fill the cooling water injection pressure of losing internal pressure. One way is to take a larger pump power, a way to relieve the internal pressure. Now take the latter, continue to vent through the release of the two reactor units and the internal air pressure. But we know, the reactor internal release of these gases contain radioactive material, which is now the most worrying. Many experts are also mentioned in a real harsh reality that if the release of gases into the sea and the role of none change the status quo, then, whether to take the final steps, which is a permanent closure of two reactors buried.
experts stressed that, even so, the two units still did not like Chernobyl. The reasons are: first, an ongoing process at the Chernobyl nuclear fission, but the two units already shut down quickly after the earthquake stopped this reflection. Second, outside of the Chernobyl reactor does not have a robust closed the thick metal containers, but this is a common feature of these two units. It also buried at the bottom, outside there is a very strong, thick, concrete building. But a little time to past, present still does not see the cooling water level increase, the Government will today make a final decision.