November 21, 2011
4:31 pm EDT
- The Japanese cabinet has approved “basic policies” to clean up radioactive contamination resulting from the Fukushima Daiichi accident. Based on recommendations made in 2007 by the International Commission on Radiological Protection, areas contaminated to dose levels within two rem per year above background will be cleaned up to reduce adult doses by 50 percent within two years and 60 percent for children, and to a long-term level of 0.1 rem/year above background radiation levels. Two rem is about the same amount of radiation exposure a patient would receive from a full body CT scan. Areas where the annual dose levels are above two rem/year will be given priority in scheduling decontamination activities.
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November 18, 2011
2:48 pm EDT
- Water temperatures inside the Fukushima Daiichi reactor pressure vessels remain below boiling as operator Tokyo Electric Power Co. reports on progress toward stabilizing the damaged reactors. The company expects to reach what it calls a “cold shutdown condition” in the three reactors by the end of the year, with temperatures below 212 F and radiation contained. The exact status of the fuel in the reactors is not known. But if damaged fuel has leaked from the reactors into the primary containments, however, TEPCO said “it is sufficiently cooled to suppress steam from being generated and [the] accompanying release of radioactive materials.” Radiation measured at the site boundary is 10 millirem per year, one-tenth of the government safety limit. The circulating reactor cooling systems continue to function, as pumps maintain the total volume of accumulated water on the site at a level that can withstand heavy rain or an extended outage of processing facilities.
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November 16, 2011
5:16 pm EDT
- Shikoku Electric Power Co. has submitted the results of first-phase stress tests for its Ikata Unit 3 reactor to the Nuclear and Industrial Safety Agency. The results show Ikata 3 could withstand an earthquake with ground acceleration 1.9 times as strong as the reactor’s design basis and a 47-foot tsunami, four times its design basis. Shikoku Electric is the second utility to submit a stress test result after Kansai Electric did so for its Ohi Unit 3 reactor Oct. 28. Read More »
November 14, 2011
6:01 pm EDT
- The Institute of Nuclear Power Operations (INPO) last Friday publicly released a detailed timeline of events at the Fukushima Daiichi nuclear power station after the March 11 earthquake and tsunami in Japan. The report, prepared as part of the industry’s integrated response to the Japan events, was delivered to U.S. industry executives, the Nuclear Regulatory Commission, members of Congress, stakeholders and the news media. Tony Pietrangelo, NEI’s senior vice president and chief nuclear officer, said, “We are sharing this report with the widest possible audience because it is important that we all work from the same set of facts in determining the appropriate response.” Read More »
November 11, 2011
11:33 am EDT
Four-Day Chronology Provides Common Baseline of Facts To Inform Response Activities by U.S. Industry, Government
WASHINGTON, D.C., Nov. 11, 2011—The Institute of Nuclear Power Operations has compiled a detailed timeline of events at the Fukushima Daiichi nuclear power station after the March 11 earthquake and tsunami in Japan. The detailed report, prepared as part of the integrated response to the Japan events, was delivered today to U.S. industry executives, the Nuclear Regulatory Commission and members of Congress.
“The U.S. nuclear energy industry is committed to learning from Japan’s experience and applying relevant lessons to make U.S. nuclear energy facilities even safer. We are sharing this report with the widest possible audience because it is important that we all work from the same set of facts in determining the appropriate response,” said NEI’s senior vice president and chief nuclear officer, Tony Pietrangelo. “It is of paramount importance that we learn from it and take our facilities to even higher levels of safety and preparedness.”
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Read the Fukushima timeline >>
Watch NEI’s Tony Pietrangelo comment on the Fukushima timeline >>