On March 11 2011, turbines and reactors of Fukushima Daini Nuclear Power
Station Units 1 to 4 (Boiling Water Reactors, rated output 1,100 Megawatts)
that we had been constantly operating at rated thermal output were
automatically shut down at 2:48 pm due to the Tohoku-Chihou-Taiheiyou-Oki
Earthquake.
(previously announced on March 11)
At 7:15 am on March 15, the reactor of Unit 4 achieved cold shutdown. As a
result, all reactors of Units 1 to 4 at Fukushima Daini Nuclear Power
Station achieved cold shutdown.
(previously announced on March 15)
As of 3:00 pm on October 11, the reactors of Units 1 to 4 are in cold
shutdown (please refer to the appendix). We will continue to make our
endeavors to further stabilize each plant of cold shutdown.
(Underlined are new matters)
○ The replacement work of Monitoring post No.6
Among monitoring posts (No.1-7), which are installed at the boundary
of the plant site, we are working the replace of No.6 monitoring post
from today to Oct 21.
We start the replacement work of No.6, which did cover water by the
tsunami with the Tohoku-Chihou-Taiheiyou-Oki Earthquake which
occurred on March 11 2011 but keeping the soundness of the apparatus
and continuing the measurement, for the purpose of the preventive
measure.
In the period of working, although it is impossible to measure
radiation dose in the air at inspected monitoring posts, we will
continue monitoring and confirming data from remaining 6 ones.
Working dates might be changed due to weather.
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Appendix: TEPCO Plant Status of Fukushima Daini Nuclear Power Station
(PDF 126KB)