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 4:00 pm on November 16, 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 (A) of Unit 1
 
Residual heat removal system (A), which could not be used because of
tsunami and been worked to return to service, was confirmed its soundness
by commissioning and returned on standby.
Heat removal and cooling system of reactor will be changed from residual
heat removal system (A) to (B) (estimated around 6 pm today).
 
As a result of this, the heat removal and cooling system of reactor of
all units (Unit 1~ 4) of Fukushima Daiichi Nuclear Station was multiplexed,
so it is considered that reliability of cold shutdown status will be
increased.
 
Meanwhile, when residual heat removal system was changed from (A) to (B),
the function of heat removal and cooling of reactor by residual heat removal
system will stopped temporary, however, cooling by clean up water system
will be implemented and temperature of furnace water will be controlled
appropriately. 

Appendix: TEPCO Plant Status of Fukushima Daini Nuclear Power Station 
                                                         (PDF 16.3KB)