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Archive for the ‘Fukushima Daiichi’ Category

Fukushima reactor contamination zones. Source US Department of Energy

Fukushima nuclear complex goes from bad to worse

by DarkSyde for Daily Kos

Tue Apr 12, 2011 at 09:35 AM EDT

Japan’s crippled Fukushima nuclear reactor complex appears to have gone from bad to worse, in part due to continual aftershocks and a small fire Monday morning. That nation’s nuclear safety agency will raise the crisis level from five to seven, putting it in the same category as the 1986 nuclear disaster at Chernobyl and the danger zones could widen. The WaPo reports:

The plant’s debilitated reactors face constant threat of strong aftershocks, and the latest on Tuesday morning — a 6.4-magnitude temblor — caused a brief fire at a water sampling facility near Daiichi’s No. 4 reactor. The Tokyo Electric Power Co., which operates the facility, said that the critical process used to cool the hot fuel rods had not been interrupted, and radiation levels showed no signs of change. A level 7 accident, according to the International Nuclear and Radiological Event Scale, is typified by a “major release of radioactive material with widespread health and environmental effects.”

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Radioactive water leaks from crippled Japan plant

By EUGENE HOSHIKO and MARI YAMAGUCHI, Associated Press 47 mins ago

RIKUZENTAKATA, Japan – Highly radioactive water spilled into the ocean from a tsunami-damaged nuclear power plant Saturday as Japan’s prime minister surveyed the damage in a town gutted by the wave.

The Fukushima Dai-ichi nuclear complex has been spewing radioactivity since March 11, when a magnitude-9.0 earthquake and ensuing wave knocked out power, disabling cooling systems and allowing radiation to seep out of the overheating reactors. Authorities said the leak they identified Saturday could be the source of radioactivity found in coastal waters in recent days.

Prime Minister Naoto Kan went to the plant and flew over the tsunami-ravaged coast soon after the wave hit, but Saturday was the first time he set foot in one of the pulverized towns.

Dressed in the blue work clothes that have become almost a uniform for officials, Kan stopped in Rikuzentakata, where the town hall is one of the few buildings still standing. All its windows are blown out and a tangle of metal and other debris is piled in front of it.

The prime minister bowed his head for a minute of silence in front of the building. He met with the town’s mayor, whose 38-year-old wife was swept away in the wave and is still missing. Officials fear about 25,000 people may have been killed, many of whose bodies have not been found.

“The government fully supports you until the end,” Kan later told 250 people at an elementary school that is serving as an evacuation center.

Megumi Shimanuki, whose family is living in a similar shelter 100 miles (160 kilometers) away in Natori, said Kan didn’t spend enough time with people on the ground. Kan returned to Tokyo in the afternoon.

“The government has been too focused on the Fukushima power plant rather than the tsunami victims,” said Shimanuki, 35. “Both deserve attention.”

Saturday’s leak was from a newly discovered crack in a maintenance pit on the edge of the Fukushima complex, Nuclear and Industrial Safety Agency spokesman Hidehiko Nishiyama said.

The crack was apparently caused by the quake and may have been leaking since then, said spokesman Osamu Yokokura of Tokyo Electric Power Co., which runs the plant.

Measurements showed the air above the radioactive water in the pit contained more than 1,000 millisieverts per hour of radioactivity. Even just two feet (60 centimeters) away, that figure dropped to 400 millisieverts. Workers have taken samples of the water in the pit and seawater and are analyzing them to determine the level of contamination.

(more…)

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The Lessons of Fukushima

Truthout

Monday 28 March 2011

by: Hugh Gusterson   |  Bulletin of the Atomic Scientists | Report

As an anthropologist, I am always interested in what humans learn from their mistakes. Can humans change their behavior, thereby improving their chances of survival, not just through natural selection, but also through cultural learning? Or are we hardwired to repeat our mistakes over and over, like humanoid lemmings?

More to the point, what lessons will we learn from the nuclear accident at Fukushima, an accident thought to be impossible just two weeks ago?

Some people, many of them presumably already ill-disposed toward nuclear energy, have concluded that the lesson of Fukushima is that nuclear energy is inherently dangerous. Thus, Eugene Robinson wrote in the Washington Post: “We can engineer nuclear power plants so that the chance of a Chernobyl-style disaster is almost nil. But we can’t eliminate it completely — nor can we envision every other kind of potential disaster. And where fission reactors are concerned, the worst-case scenario is so dreadful as to be unthinkable.” His colleague Anne Applebaum wrote on the same op-ed page: “If the competent and technologically brilliant Japanese can’t build a completely safe reactor, who can? … I … hope that a near-miss prompts people around the world to think twice about the true ‘price’ of nuclear energy, and that it stops the nuclear renaissance dead in its tracks.” (The nuclear renaissance comprises plans around the world to build as many as 350 new nuclear reactors, partly as a way of inhibiting climate change.)

MORE HERE

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The Al Jazeera English Tumblr

About an hour ago–  March 17, 2011

Screen grab from a video showing the extent of the damage done to the reactors at the Fukushima Daiichi complex.

This shot shows the damage done to the unit 4 reactor, where emergency workers earlier attempted to fire water at in a bid to cool the fuel rods.

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