Comment 61005

By Zot (anonymous) | Posted March 16, 2011 at 11:29:55

Wednesday updates:
The Japanese government has passed an emergency regulation that doubles the "allowable" level of radiation exposure for nuclear plant workers.
The utility has returned 100 workers to the site, following an evacuation yesterday due to excessive radiation levels.
The utility is reporting that the pressure vessel of the #3 reactor ruptured today, and that the pressure vessel of #2 reactor ruptured yesterday due to an internal hydrogen explosion. The rupture at #3 required the workers to shelter on site due to a radiation spike, but they did not evacuate.
Yukio Edano, the chief cabinet secretary, has said today that it is "unlikely" that the ruptures in the pressure vessels are "severe", at the same time the Utility is saying that they are unable to get close enough to assess conditions inside the damaged reactor buildings due to high radiation levels.
Plans to drop water on the spent fuel pool in #4 reactor using helicopters have been rehearsed, but are on hold. Radiation levels in the steam cloud above #4 pose an unacceptable risk to the helicopter aircrews at the present time.
Japans supply of Boron, which has been being mixed with the emergency cooling water, is close to being depleted. South Korea has said it will ship 52 tons of Boron to Japan from its 310 ton emergency stockpile to aid in the relief efforts.
France and Germany are advising their nationals to leave the Tokyo area.
The American and French navy are reevaluating details of their assistance to the accident site due to contamination levels of American carrier based aircraft.

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