6/12/2011 | Tepco vents No. 2 reactor while U.S. surveys ocean

Source: The Japan Times
Date: Sunday, June 12, 2011

Kyodo

Tokyo Electric Power Co. said Saturday it began filtered venting of the No. 2 reactor building at the crippled Fukushima No. 1 nuclear plant to reduce radiation levels to the point where workers can go inside.

If the airborne radioactivity inside drops enough after three days, Tepco plans to open up the doors and send workers in to make repairs.

The No. 2 unit's high radioactivity and humidity have prevented workers from checking gauges and pipes, hampering the beleaguered utility's efforts to guide the reactor into a cold shutdown.

Meanwhile, a U.S. private research institute is conducting a survey of waters off Fukushima to assess the radiation's impact on the ecosystem.

An international team of experts led by the Woods Hole Oceanographic Institution began the 15-day survey June 4. It is being carried out on a research ship from the University of Hawaii, with permission from the Japanese government, government officials said.

5/26/2011 | U.S. reactor retrofits in works to avoid blasts

Source: Bloomberg via The Japan Times
Date: Thursday, May 26, 2011

New York/New Delhi — Entergy Corp., the second-biggest nuclear operator in the U.S., and Duke Energy Corp. said the industry may need to retrofit reactors or bolster safety systems after a pressure-relief system failed at the Fukushima No. 1 plant, contributing to the disaster.
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5/19/2011 | Touted upgrades like Browns Ferry's failed in Japan

Source: The Tennessean
Date: Thursday May 19, 2011

Safety improvements long in place at Browns Ferry Nuclear Plant had been touted as able to protect it from the explosions that tore up a Japanese plant of the same design, but Japanese officials said this week they had upgraded too.
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