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.
(March 11 Previously announced)
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.
(March 15 Previously announced)
As of 3:00 pm on November 18, the reactors of Units 1 to 4 are in cold
shutdown (please refer to the appendix for each reactor status).
We will continue to make our endeavors to further stabilize each plant of
cold shutdown.
The underlined parts are the updates from the previous press release.
○Restoration of Residual heat removal system of Unit 1
Residual heat removal system of Unit 1 was switched from (B) to (A). (At
5:15 pm, residual heat removal system pump (B) stopped and at 5:29 pm, the
system pump (A) started.) After that, the residual heat removal system (B)
was returned on standby.
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Appendix: TEPCO Plant Status of Fukushima Daini Nuclear Power Station (as
of 3:00 pm on November 18, 2011)(PDF 15.8KB)