For one minute this week, workers at the สูตรเล่นสล็อต Fukushima nuclear station have been silent to mark the 10th anniversary of the natural disaster causing the worst nuclear accident since Chernobyl.They then returned to work to dismantle the melted reactor just days after the tsunami on March 11, 2011.The event is rated as the most expensive and dangerous nuclear cleanup ever. A decade ago, an army of 5,000 engineers, scientists and workers continued to map projects that many expected had not been completed in their lifetimes.Naoaki Okuzumi, head of research at Japan's Leading Research Institute on Discharge Japan, compared his forward job with a no-map mountaineering.The feeling we have is that you think the summit is there. But then you reach and see another summit far away, ”Okuzumi told Reuters.Okuzumi and others had to find a way to safely dispose of and store 880 tons of radioactive uranium fuel, along with large amounts of concrete and metal that the fuel melted a decade ago during the accident.
No android tools to work. There are no plans for where the radioactive material will be placed once it has been removed.The Japanese government said the work could go on for 40 years, outside experts said it could take twice as long to complete in the near-century.Graphic: Fukushima's recovery from disaster Tepco's Fukushima Daiichi nuclear plant, which once had six reactors, was hit by a tsunami, followed by a magnitude 9.0 earthquake on the northern coast of Japan on March 11, 2011.An earthquake and tsunami flooded the backup generator at Fukushima, causing the cooling system to collapse. The reactor quickly overheats, causing an explosion when the uranium core melts. A radioactive plumage has forced the evacuation of about 160,000 people.Until 2017, engineers understood how complex a cleanup would be. At that point, five specially designed robots were sent in the dark, contaminated water that was pumped in to cool the uranium. But radiation destroyed their electronic devices.
A robot developed by Toshiba Corp nicknamed The "Little Sunfish", a loaf-sized device, saw the chaotic damage surrounding the core in the early days.Kenji Matsuzaki, Toshiba's robot technician who led the development of "sunfish", assumed that they would find melted fuel at the bottom of the reactor.But the sunfish's first video shows the destruction, with a structure flipping inside the reactor, an unrecognizable brown debris and a dangerous radioactive metal.I expected it to be broken. But I didn't expect it to be this bad, ”said Matsuzaki.The delivery of the robot arm to kick off the fuel, developed in a $ 16 million project with the UK Nuclear Decommissioning Authority, was delayed until 2022.Tepco plans to use it to collect debris from inside Reactor 2 to Tests and helps plan key functions The project was some success. Approximately 2,000 spent fuel rods in reactors No. 3 and No. 4, which could cause another massive radiation release if overheated, are removed after a giant frame and crane are erected over the building.
Radiation has dropped in most Fukushima workspaces, about the size of New York's Central Park.In most areas of the factory, 5,000 workers do not need special protective equipment that slows down their work during the hot and humid summers. Longer Japan But cleaning was delayed due to the accumulation of contaminated water in the tank that crowded the area. The molten core is cooled by pumping water into the damaged reactor.The water is pumped out and treated. Radioactive water storage tanks are now sufficient to fill more than 500 Olympic-sized swimming pools, Tepco expects to use the highest storage space next year.Most analysts expect the government to release water into the ocean after further treatment. The fishing community has opposed the act and South Korea and China have opposed the move.There are currently no plans for where the radioactive debris from the reactor will be placed.It's not a good thing to move radioactive waste from inside a nuclear reactor to another in a factory," said Hiroshi Miyano, head of the Demolition Committee of the Japan Atomic Energy Association. Questions to ask
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