World Climbing without a map: Japan's nuclear clean-up has no end in sight
Western powers drop censure plan as Iran agrees to IAEA talks
Iran agrees to cooperate with international experts regarding uranium particles discovered at several of its sites.Iran’s foreign ministry credited “intense diplomatic efforts” by Tehran and all other participants to its 2015 nuclear deal with world powers for stopping a European and American-backed resolution at the Board of Governors of the International Atomic Energy Agency (IAEA).
By Sakura Murakami and Aaron Sheldrick
TOKYO (Reuters) - For one minute this week, workers at the Fukushima nuclear station fell silent to mark the 10-year anniversary of a natural disaster that triggered the worst nuclear accident since Chernobyl.
Then they went back to work tearing down the reactors melted down in the days after a tsunami on March 11, 2011.
The job ranks as the most expensive and dangerous nuclear clean-up ever attempted. A decade in, an army of engineers, scientists and 5,000 workers are still mapping out a project many expect will not be completed in their lifetime.
Iran’s Zarif to offer ‘constructive’ plan for nuclear talks
Announcement comes after European diplomatic sources said Iran recently gave encouraging signs.“As Iran’s FM [foreign minister] & chief nuclear negotiator, I will shortly present our constructive concrete plan of action – through proper diplomatic channels,” Zarif said on Twitter.
Naoaki Okuzumi, the head of research at Japan's lead research institute on decommissioning, compares the work ahead to climbing a mountain range - without a map.
"The feeling we have is, you think the summit's right there, but then you reach it and can see another summit, further beyond," Okuzumi told Reuters.
Okuzumi and others need to find a way to remove and safely store 880 tonnes of highly radioactive uranium fuel along with a larger mass of concrete and metal into which fuel melted a decade ago during the accident.
The robotic tools to do the job don't yet exist. There is no plan for where to put the radioactive material when it is removed.
‘We don’t know when it will end’: 10 years after Fukushima
Tens of thousands were evacuated after the 2011 Fukushima nuclear disaster in Japan. Many still worry about radiation.Memories of that March day 10 years ago remain fresh for those who experienced it.
Japan's government says the job could run 40 years. Outside experts say it could take twice as long, pushing completion near the close of the century.
GRAPHIC: Fukushima's recovery from disaster https://graphics.reuters.com/JAPAN-DISASTER-NUCLEAR-ICEWALL/01006144292/JAPAN-DISASTER.jpg
Tepco's Fukushima Daiichi nuclear plant, which once had six reactors, was plunged into crisis by the tsunami that followed a magnitude 9.0 quake off the shore of northern Japan on March 11, 2011.
The quake and tsunami flooded the back-up power generators at Fukushima, knocking out cooling systems. The reactors quickly overheated, setting off explosions as uranium cores melted down. The radioactive plumes that formed forced the evacuation of about 160,000 people.
It wasn't until 2017 that engineers understood how complicated the clean-up would become. By that point, five specially designed robots had been dispatched through the dark, contaminated waters pumped in to cool the uranium. But radiation zapped their electronics.
Japan honours victims of 2011 quake, tsunami and nuclear disaster
A minute’s silence will be held nationwide at 14.46 local time, the precise moment the 9.0-magnitude quake struck on M arch 11, 2011. The onslaught of waves triggered by the tremor crashed into the northeastern coast, crippling the Fukushima Dai-ichi nuclear power plant. More than 160,000 residents were forced to evacuate as radiation spewed into the air. The disaster has left survivors in Tohoku struggling to overcome the grief of losing families and whole communities to the 15-metre high wave.
One robot developed by Toshiba Corp, nicknamed the "little sunfish", a device about the size of a loaf of bread, provided an early glimpse of the chaotic damage around the cores.
Kenji Matsuzaki, a robot technician at Toshiba who led development of the "sunfish", had assumed that they would find melted fuel at the bottom of the reactors.
But the sunfish's first video images showed a tumult of destruction, with overturned structures inside the reactor, clumps of unrecognizable brown debris and dangerously radioactive metal.
"I expected it to be broken, but I didn't expect it would be this bad," Matsuzaki said.
The delivery of a robotic arm to start removing fuel, developed in a $16 million programme with the UK's Nuclear Decommissioning Authority, has been delayed until 2022. Tepco plans to use it to grab some debris from inside reactor 2 for testing and to help plan the main operation.
The project has had some successes. About 2,000 spent fuel rods in reactors No. 3 and No. 4 - which could have caused another massive radiological release if they overheated - have been removed after giant frames and cranes were erected over the buildings.
China, North Korea top agenda as Blinken begins first Asian tour
Top diplomat will arrive in Tokyo on Monday before heading to Seoul as he seeks to rebuild frayed alliances.The two men will start their tour in the Japanese capital, Tokyo, on March 15 for so-called two-plus-two meetings, which will bring together the diplomatic and military leadership of the two countries. They will then head to South Korea’s Seoul on March 17. Afterwards, Blinken is expected to meet his Chinese counterparts, Yang Jiechi and Wang Yi in Anchorage in the US state of Alaska.
Radiation has been reduced in most of the Fukushima work site, about the size of New York's Central Park. In most areas of the plant, the 5,000 workers no longer need special protective equipment that had slowed work during Japan's hot, humid summers.
GRAPHIC: Japan earthquake and tsunami https://graphics.reuters.com/JAPAN-FUKUSHIMA/ANNIVERSARY/gjnvwzmqjpw/JAPAN-EARTHQUAKE-ANNIVERSARY.jpg
But the cleanup has been delayed by the buildup of contaminated water in tanks that crowd the site. The melted cores are kept cool by pumping water into damaged reactor vessels.
The water is pumped out and treated. Storage tanks now hold enough radioactive water to fill more than 500 Olympic-sized swimming pools. Tepco expects it will max out its storage space next year.
Most analysts expect the government to release the water into the ocean after further treatment. Fishing communities have lobbied against that and South Korea and China have objected to such a move.
There still is no plan for where to put the radioactive debris from the reactors.
"It's no good just moving highly radioactive waste from inside the nuclear reactor to somewhere else in the plant," said Hiroshi Miyano, the head of the decommissioning committee of the Atomic Energy Society of Japan. "Where will the waste go? Will it be pulverized? These are the questions that need to be asked."
(Reporting by Sakura Murakami and Aaron Sheldrick; Writing by Kevin Krolicki; Editing by Gerry Doyle)
Iran, Russia denounce UK plan to boost nuclear arsenal .
Iran and Russia on Wednesday denounced the UK's decision to bolster its nuclear arsenal, with the Islamic republic accusing it of "hypocrisy" and the Kremlin warning the move threatens international stability. This decision harms international stability and strategic security," Kremlin spokesman Dmitry Peskov said. "The presence of nuclear warheads is what threatens peace throughout the world."- 'Credible deterrence' -Britain on Wednesday insisted its plan was the "minimum" required to maintain its deterrence capability.