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Unknown – the methods, costs, time taken, to clean up Fukushima nuclear site

Fukushima-aerial-viewquestionFukushima chief says ‘no textbook’ for nuclear cleanup, CTV News,  Yuri Kageyama, The Associated Press , December 15, 2015 TOKYO — The man leading the daunting task of dealing with the Fukushima nuclear plant that sank into meltdowns in northeastern Japan warns with surprising candour: Nothing can be promised.

How long will it take to decommission the three breached reactors, and how will it be accomplished, when not even robots have been able to enter the main fuel-debris areas so far? How much will it ultimately cost? Naohiro Masuda, tapped last year as chief of decontamination and decommissioning for plant owner Tokyo Electric Power Co., acknowledges he is a long way from answering those questions definitively.

“This is something that has never been experienced. A textbook doesn’t exist for something like this,” Masuda told The Associated Press in an interview at TEPCO’s Tokyo headquarters Monday.

It’s only recently the daily situation at Fukushima Dai-ichi has even started to approach “normal,” he said. Since the March 2011 meltdowns, TEPCO has had to face one huge challenge after another, including storing masses of leaking radioactive water, clearing up rubble and removing fuel rods from a crumbled building.

“Before, it was a war zone,” Masuda said quietly.

Masuda’s approach contrasts with the sometimes ambitious, sometimes wishful announcements by the Japanese government, which pronounced the disaster “under control” as early as late 2011, just months after a devastating tsunami knocked out power to the Fukushima Dai-ichi nuclear plant, setting off the meltdowns.

But in June, the government and TEPCO acknowledged the target dates in the official “roadmap” for decommissioning had to be pushed back by about two years. Now even the most optimistic projections estimate the work will take about half a century.

Masuda said without hesitation that more delays could be in order. No one knows exactly where the melted nuclear debris is sitting in the reactors, let alone how exactly the debris might be taken out. Computer simulation and speculative images are all he has so far.

New science will have to be invented for the plant to be cleaned up. Each step of the way, safety and consequences must be weighed, for workers and for the environment alike, Masuda added.

Under the latest plan, the removal of the fuel debris is expected to start within a decade. Still, Masuda likened such goals to reminders not to slack off, rather than hard deadlines based on real-life assessments.

The March 2011 catastrophe is unprecedented. Unlike the 1979 partial meltdown at Three Mile Island in the U.S., the containment, where the morass of fuel lies, has been breached at Fukushima Dai-ichi plant. Radioactive water is piling up: 300 tons a day by the latest count. And as devastating as the 1986 Chernobyl disaster was in what is now Ukraine, that involved one reactor, not three……..

Masuda, who has worked for TEPCO for more than 30 years, won praise for preventing meltdowns or explosions at Fukushima Dai-ni, a sister plant that also lost electricity after the 2011 tsunami. As then head of Dai-ni, Masuda acted quickly and decisively, leading his team, despite the chaos unfolding, to connect the reactors to surviving power sources.

His company’s image is much different. TEPCO’s reputation in the Japanese public eye was badly tarnished because of its bumbling response in the early days of the disaster.

The utility has undergone a public bailout and has readied 2 trillion yen ($17 billion) for decommissioning. The Japanese government has earmarked 54 billion yen ($446 million) of public funds for researching decommissioning technology through this fiscal year.

Such money doesn’t include compensation or damage lawsuits. The Fukushima catastrophe spewed radiation into the air, ocean and surrounding areas through hydrogen explosions, and displaced some 100,000 people.

The way TEPCO is spending money has drawn some criticism from experts abroad. Unlike the U.S. system, there is no open bid or escrow fund in Japan to dole out the massive decommissioning funds.

Much of the work is going to the Japanese manufacturers that constructed the plants, such as Toshiba Corp. and Hitachi Inc., under long-term contracts. Some outside international consultants are involved, and some foreign companies have gotten water-decontamination and other contracts…….. http://www.ctvnews.ca/world/fukushima-chief-says-no-textbook-for-nuclear-cleanup-1.2700578

 

December 17, 2015 - Posted by | Fukushima 2015

1 Comment »

  1. PRAY

    Comment by Gene B Sr. | December 21, 2015 | Reply


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