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UPDATE, 3:30 pm, Wednesday, The New York Times has an important front-page story today on a still-unreleased U.S. Nuclear Regulatory Commission assessment that indicates the situation at Fukushima remains extremely serious, that some of the measures Tepco and the Japanese government have taken have caused unanticipated repercussions and new problems—in particular new stresses placed on the containments that places their ability to withstand earthquake aftershocks in doubt, and ongoing concerns about the possibility of more hydrogen explosions at the site.
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UPDATE, 4:30 pm Tuesday, Japan’s NHK TV is reporting that a plant worker at Fukushima Daiichi says that radiation levels inside the reactors buildings of Units 1-3 are “immeasurable”—so high that their radiation monitors have been rendered useless. The report states that levels of 10 rems/hour have been measured even outside the buildings.
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UPDATE, 11:00 am, Tuesday, The Los Angeles Times is reporting that radioactive Iodine-131 has been measured in seawater near Fukushima at 7.5 million times the legal limit. Perhaps even more worrisome is that radioactive Cesium-137 has been measured at more than 1 million times the limit. The Cesium is likely to lodge in sediment in the region and remain a factor for marine life and fishing for perhaps centuries.
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UPDATE, 10:30 am, Monday, Japan’s government has acknowledged the obvious: that it will be months before the Fukushima nuclear crisis can be considered under control, and likely there will continue to be radiation releases for an extended period.
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UPDATE 12:45 pm, Friday, Urgent international sign-on petition sponsored by 168 Japanese organizations to expand Fukushima evacuation zone and take other necessary measures to protect the people of Japan. Sign here.
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UPDATE, 11:30 am, Friday, New video shows that Unit 4 fuel pool is exposed to the air and contains little or no water. Nuclear engineer Arnie Gunderson of Fairewinds Associates explains the video and its implications.
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