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 1 to 4: shutdown due to the earthquake)

 - At 9:18 am on January 31, we started transfer of Sub-drain Water of Unit  
   6 to the temporary tank. Hereafter, we will conduct transferring to the 
   temporary tank arbitrarily. 
 - At 10:50 am on January 31, since we finished the replacing the water 
   injection line of the reactor water injection pump on the hill to 
   polyethylene pipe in order to improve the reliability of water injection 
   to the reactor, we changed the water injection volume to the reactor 
   gradually. Then, we adjusted the water injection volume to the reactor 
   of Unit 2 through the feed water system from approx. 6.6 m3/h to approx.  
   5.0 m3/h, and the volume from the reactor core spray system from 2.8  
   m3/h to approx. 4.0m3/h. At 11:00 am on the same day, we adjusted the 
   volume to the reactor of Unit 3 through the feed water system from  
   approx. 6.2 m3/h to approx. 5.0 m3/h, and the volume from the reactor  
   core spray system from 2.8 m3/h to approx. 4.0m3/h. 
 - Regarding the water leakage from Filtrate water supply valve of Unit 3 
   spent fuel pool cooling system occurred on January 29,we removed the  
   valve and completed installation of blanking plate, In addition, we are  
   temporally suspending the secondary cooling tower in order to prevent  
   overcooling of spent fuel pool alternative cooling facility.  
 - Newly found water leakage that was thought to be due to freezing from  
   the previous release (as of 10:00 am on January 31) was as follow; 
 
    ○ No.2 filtered water tank valves bonnet screw part 
      (Two Valves. Found at 2:30 pm on January 31) 
      (Filtrate water*: approx. 20 L ) 
 
      *Filtrate water: water taken from the barrage 
 
· 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 facilities damaged by the 
  earthquake are now being handled in a timely manner. 
 

[Hydro Power Station] 
· Power supply has returned to normal and facilities damaged by the 
  earthquake are now being handled in a timely manner. 
 

[Impacts on Transmission Facilities] 
· Power supply has returned to normal and facilities damaged by the 
  earthquake are now being handled in a timely manner. 
 

[Impacts on Power Supply and Demand Balance] 
This winter, there are some minus factors such as the regular inspection 
of Unit 5 at Kashiwazaki-Kariwa Nuclear Power Station*. On the other hand, 
there are several plus factors such as the recovery of the common thermal 
power stations which suffered the earthquake. As a result, we expect to 
secure 54.6 GW (at the end of January), 53.7 GW (at the end of February) 
supply power. 
Compared to the maximum demand in the last winter, which is 51.5 GW, we 
will have 2.2 - 3.1 GW generation reserve margin.
 
We expect to maintain stable power supply this winter, however, as there 
remains possibilities of unplanned shutdowns at our power stations and 
growth in the demand according to the rapid change in the temperature, we 
would like to ask your reasonable effort to save electricity.

We will continue to make our efforts to maintain stable operation and 
maintenance of the power facilities in order to "prevent in principle" the 
planned blackouts and secure power supply.

* Correction of Description in [Impacts on Power Supply and Demand Balance] 
We described,"there will be some minus factors such as the regular 
inspection of Unit 5 at Kashiwazaki-Kariwa Nuclear Power Station" in the 
previous press release. However, because Unit 5 of Kashiwazaki-Kariwa 
Nuclear Power Station has already conducted a regular inspection since 
January 25, we revise the previous sentence to "there are some minus 
factors such as the regular inspection of Unit 5 at Kashiwazaki-Kariwa 
Nuclear Power Station". We would like to apologize for the correction 
(February 8, 2012). 

 
Appendix: Past Progress (As of 3:00 pm, January 31, 2012) (PDF 386KB) 
Appendix: Past Progress (From March 11, 2011 to July 31, 2011) (PDF 225KB) 
 
* Revised past progress