Due to the Tohoku-Chihou-Taiheiyou-Oki Earthquake which occurred on March
11, 2011, TEPCO's facilities including our nuclear power stations have
been severely damaged. We deeply apologize for the anxiety and
inconvenience caused.
With regard to the accident at Fukushima Daiichi Nuclear Power Station,
on April 17, 2011, we have compiled the roadmap towards restoration from
the accident and on July 19 we accomplished the Step1 target "Radiation
dose is in steady decline". Then on December 16 we confirmed the
accomplishment of the Step 2 target "Release of radioactive materials is
under control and radiation doses are being significantly held down".
In addition, on December 21, 2011, we have compiled the "Mid-to-long-Term
Roadmap toward the Decommissioning of Fukushima Daiichi Nuclear Power
Units 1-4, TEPCO".
In addition to the maintenance of the plant's stable condition, we will
implement Mid-to-Long Term countermeasures towards the decommissioning of
Fukushima Daiichi Nuclear Power Units 1-4 to enable evacuees to return to
their homes as soon as possible and reduce the anxiety of the people in
Fukushima and the whole nation as soon as possible.

Below is the status of TEPCO's major facilities.

* The updates are underlined. 
 
 
[Nuclear Power Station]  
· Fukushima Daiichi Nuclear Power Station: Unit 1 to 3: shut down due to
  the earthquake:
  (Units 4 to 6: outage due to regular inspections before the earthquake)

 - With regard to the thermometer placed at the lower part of RPV (top of
   the lower head 135°)  whose trend were different  while others showed
   the increasing trend after we decreased the water injection rate to
   the Unit 2 Reactor from the feed water system on February 22, we
   reported to Nuclear and Industrial Safety Agency of Ministry of
   Economy, Trade and Industry on March 1. We will continue monitoring
   this thermometer.
   · At 11:00 am on March 13, the temperature of the lower part of the RPV  
     (top of the lower head 135°) : approx. 39.5 °C  
   · At 11:00 am on March 13, the temperature of the lower part of the RPV  
     (top of the lower head 270°) : approx. 40.3 °C (reference)

 - In order to stop the offset power and change the station power supply
   with starting to operate the south switching station, we stopped the
   operation of desalination facility (reverse osmosis membrane type) at
   4:25 am on March 13, 2012,and the cesium adsorption instrument No.2 at
   5:43 am on the same day. Since we finished changing the station power  
   supply, we resumed the operation of desalination facility (reverse  
   osmosis membrane type) at 12:23 pm on the same day, and the cesium  
   adsorption instrument No.2 at 12:39 pm on the same day.  

 - At 10:31 am on March 13, because the suction pressure of the primary  
   system Circulating Water Pump had a tendency to decrease in the  
   substitute cooling system of spent fuel pool at Unit 2, we stopped the  
   cooling of spent fuel pool in order to change the primary system  
   Strainer to manual cleaning system and conduct the check of valves etc.  
   until March 16. The temperature rise on this period is expected approx.  
   21 °C. (Temperature of water in spent fuel pool when we stopped:  
   approx. 14.1 °C)  

· Fukushima Daini Nuclear Power Station: 
   Units 1 to 4: shutdown due to the earthquake

· Kashiwazaki Kariwa Nuclear Power Station:
   Units 6: under normal operation
   (Units 1 to 5 and 7: outage due to regular inspections)  
 
 
[Thermal Power Station]  
· Power supply has returned to normal and the facilities damaged by the
  earthquake are now being handled in a timely manner.  
 
 
[Hydro Power Station]  
· Power supply has returned to normal and the facilities damaged by the
  earthquake are now being handled in a timely manner.  
 
 
[Impacts on Transmission Facilities]  
· Power supply has returned to normal and the facilities damaged by the
  earthquake are now being handled in a timely manner.  
 
 
[Impacts on Power Supply and Demand Balance]  
We expect to maintain stable power supply in March.
Daily supply and demand balance is announced at our "TEPCO Electricity
Forecast".  
  

  
Appendix: Past Progress (As of 3:00 pm, on March 13, 2012) (PDF 697KB)  
Appendix: Past Progress (From March 11, 2011 to July 31, 2011) (PDF 225KB)  

* Revised past progress