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| New York Times (Internet), August 9, 2011 |
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Japan Held Nuclear Data,
Leaving Evacuees in Peril
(Page 2 of 4) |
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The Timing of many admissions - coming around late May and early June,
when inspectors from the International Atomic Energy Agency visited Japan
and before Japan was scheduled to deliver a report on the accident at an
I.A.E.A conference - suggested to critics that Japan's nuclear establishment
was coming clean only because it could no longer hide the scope of the
accident. On July 4, the Atomic Energy Society of Japan, a group of nuclear
scholars and industry executives, said, "It is extremely regrettable
that this sort of important information was not released to the public
until three months after the fact, and only then in materials for a conference
overseas. "
The group added that the authorities had yet to disclose information like the water level and temperature inside reactor pressure vessels that would yield a fuller picture of the damage. Other experts have said the government and Tokyo Electric Power Company, known as Tepco, have yet to reveal plant data that could shed light on whether the reactors’ cooling systems were actually knocked out solely by the 45-foot-tall tsunami, as officials have maintained, or whether damage from the earthquake also played a role, a finding that could raise doubts about the safety of other nuclear plants in a nation as seismically active as Japan.
Government officials insist that they did not knowingly imperil the public.
“As a principle, the government has never acted in such a way as to sacrifice the public’s health or safety,” said Mr. Hosono, the nuclear disaster minister.
Here in the prefecture’s capital and elsewhere, workers are removing the surface soil from schoolyards contaminated with radioactive particles from the nuclear plant. Tens of thousands of children are being kept inside school buildings this hot summer, where some wear masks even though the windows are kept shut. Many will soon be wearing individual dosimeters to track their exposure to radiation.
At Elementary School No. 4 here, sixth graders were recently playing shogi and go, traditional board games, inside. Nao Miyabashi, 11, whose family fled here from Namie, said she was afraid of radiation. She tried not to get caught in the rain. She gargled and washed her hands as soon as she got home.
“I want to play outside,” she said.
About 45 percent of 1,080 children in three Fukushima communities surveyed in late March tested positive for thyroid exposure to radiation, according to a recent announcement by the government, which added that the levels were too low to warrant further examination. Many experts both in and outside Japan are questioning the government’s assessment, pointing out that in Chernobyl, most of those who went on to suffer from thyroid cancer were children living near that plant at the time of the accident.
Critics inside and outside the Kan administration argue that some of the exposure could have been prevented if officials had released the data sooner.
On the evening of March 15, Mr. Kan called Mr. Soramoto, who used to design nuclear plants for Toshiba, to ask for his help in managing the escalating crisis. Mr. Soramoto formed an impromptu advisory group, which included his former professor at the University of Tokyo, Toshiso Kosako, a top Japanese expert on radiation measurement.
Mr. Kosako, who studied the Soviet response to the Chernobyl crisis, said he was stunned at how little the leaders in the prime minister’s office knew about the resources available to them. He quickly advised the chief cabinet secretary, Yukio Edano, to use Speedi, which used measurements of radioactive releases, as well as weather and topographical data, to predict where radioactive materials could travel after being released into the atmosphere.
Speedi had been designed in the 1980s to make forecasts of radiation dispersal that, according to the prime minister’s office’s own nuclear disaster manuals, were supposed to be made available at least to local officials and rescue workers in order to guide evacuees away from radioactive plumes.
And indeed, Speedi had been churning out maps and other data hourly since the first hours after the catastrophic earthquake and tsunami. But the Education Ministry had not provided the data to the prime minister’s office because, it said, the information was incomplete. The tsunami had knocked out sensors at the plant: without measurements of how much radiation was actually being released by the plant, they said, it was impossible to measure how far the radioactive plume was stretching.
“Without knowing the strength of the releases, there was no way we could take responsibility if evacuations were ordered,” said Keiji Miyamoto of the Education Ministry’s nuclear safety division, which administers Speedi. |
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