Fri, Dec 09, 2011 - Page 9 News List

Japan’s nuclear cleanup proposal sets goal of ‘going home’

The plan would involve scrubbing thousands of buildings, replacing massive amounts of topsoil and even decontaminating forests, with no guarantee of success

By Martin Fackler  /  NY Times News Service, FUTABA, JAPAN

“We are different from Chernobyl,” said Toshitsuna Watanabe, 64, the mayor of Okuma, one of the towns that was evacuated. “We are determined to go back. Japan has the will and the technology to do this.”

Such resolve reflects, in part, a deep attachment to home for rural Japanese like Watanabe, whose family has lived in Okuma for 19 generations. Their heartfelt appeals to go back have won wide sympathy across Japan, making it hard for people to oppose their wishes in public.

However, quiet resistance has begun to grow, both among those who were displaced and those who fear the country will need to sacrifice too much without guarantees that a multibillion-dollar cleanup will provide enough protection.

Soothing pronouncements by local governments and academics about the eventual ability to live safely near the ruined plant can seem to be based on little more than hope.

No one knows how much exposure to low doses of radiation causes a significant risk of premature death. That means Japanese living in contaminated areas are likely to become the subjects of future studies — the second time in seven decades that Japanese have become a test case for the effects of radiation exposure, after the bombings of Hiroshima and Nagasaki.

The national government has declared itself responsible for cleaning up only the towns in the evacuation zone; local governments have already begun cleaning cities and towns outside that area.

Inside the 19km ring, which includes Futaba, the environmental ministry has pledged to reduce radiation levels by half within two years — a relatively easy goal because short-lived isotopes will deteriorate.

The bigger question is how long it will take to reach the ultimate goal of bringing levels down to about 1 millisievert per year, the annual limit for the general public from artificial sources of radiation that is recommended by the International Commission on Radiological Protection. That is a much more daunting task given that it will require removing cesium 137, an isotope that has a half-life of 30 years, meaning it will remain radioactive for decades.

Trial cleanups have been delayed for months by the search for a storage site for as much as 35.5 million cubic meters of contaminated dirt, enough to fill 33 domed football stadiums. Even evacuated communities have refused to accept it.

And Tomoya Yamauchi, the radiation expert from Kobe University who performed tests in Fukushima City after extensive remediation efforts, found that radiation levels inside homes had dropped by only about 25 percent. That left parts of the city with levels of radiation four times higher than the recommended maximum exposure.

“We can only conclude that these efforts have so far been a failure,” he said.

Minamisoma, a small city whose center sits about 25km from the nuclear power plant, is a good place to get a sense of the likely limitations of decontamination efforts.

The city has cleaned dozens of schools, parks and sports facilities in hopes of enticing back the 30,000 of its 70,000 residents who have yet to return since the accident.

So far, city officials say, only a few hundred have come back.

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