Press Release (Mar 13,2011) - Impact to TEPCO's Facilities due to Miyagiken-Oki Earthquake (as of 3:00PM)
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Fukushima Daiichi Nuclear Power Station:
Unit 1:
The value of radioactive material (iodine, etc) is increasing according to the monitoring car at the site (outside). Today, the measured value revamped and the radiation dose measured at site boundary exceeded the limiting value again.
Unit 3:
we operated the vent valve to reduce the pressure of the reactor containment vessels (partial release of air containing radioactive materials) and completed the procedure at 8:41AM, Mar 13 (successfully completed at 09:20AM, Mar 13.). Taking account of the situation that the water level within the pressure vessel did not rise for a long time and the radiation dose is increasing, we cannot exclude the possibility that the same situation occurred at Unit 1 on Mar 12 will occur.
We are considering the countermeasure to prevent that.
UpDated at Press Release (Mar 13,2011 - 3:00PM
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