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 9:35am on January 31, we started transferring the accumulated water 
    from On-site Bunker Building to Process Main Building at Centralized 
    Radiation Waste Treatment Facility. At 3:33 pm on the same day, we  
    stopped the transfer. 
  - At 10:00 am on January 31, we started transferring the water 
    accumulated in the basement of Unit 6 Turbine Building to temporary 
    tanks. At 4:00 pm on the same day, we stopped the transfer. 
  - After we finished replacing the water injection line from the reactor  
    water injection pump on the hill to polyethylene pipe in order to 
    improve the reliability of water injection to the reactor, we have been 
    changing the water injection volume to the reactor gradually. At 11:25 
    pm on January 31, we adjusted the water injection volume to the reactor 
    of Unit 1 through the feed water system from approx. 5.8 m3/h to approx. 
    4.5 m3/h, and the volume from the reactor core spray system from approx. 
    0.9 m3/h to approx. 2.0m3/h. 
  - After we found the radioactive accumulated water in the trench between 
    Process Main Building and Miscellaneous Solid Waste Volume Reduction 
    Treatment Building at Centralized Radiation Waste Treatment Facility 
    (on December 18, 2011), we started the inspection of other trenches etc. 
    in the power station on January 11.
    Places the accumulated water was found by the inspection on January 31 
    and its nuclide analyses results (provisional) are as follows; 
    · Discharge pit of the circulation water pump in the pump room, Unit 4 
      I-131: Below detection limit, Cs-134:4.5x100Bq/cm3, Cs-137:6.3x 
      100Bq/cm3 
    · Cable duct at the start-up transformer, Unit 1 
      I-131: Below detection limit, Cs-134:2.2x100Bq/cm3, Cs-137:3.0x  
      100Bq/cm3  
    · We confirmed that no water was accumulated in the trench on the north 
      of former Administration Office Building. 
  - At approx. 10:30 pm on January 31, we found that the water was leaking 
    from the indicator test line in the rack instruments for jet pumps were 
    stored. At 10:43 pm, the leakage was stopped after the main valve  
    leading to the rack was closed. Debris were scattered around on the 
    floor, and the volume of leaked water was approx. 6 litters as far as 
    we could confirmed. Please note that it didn't run off outside of the 
    reactor building. We sampled the water in the test line and measured 
    the radioactivity concentration. From the results, we estimated the 
    water leaked from the reactor well (analysis result: 35.5 Bq/cm3). 
  - Newly found water leakage after the previous announcement (as of 3:00  
    pm January 31) is as follows; 
    · Casing of the water injection pump (electrically driven pump for Unit  
      2) at the side of the pure water tank (found approx. at 4:00 pm on  
      January 31) 
      (Filtrate water*: approx. 10 L) 
      * Filtrate water: water taken from the dam 
    · Indicator (flow rate transmitter) test line in the instrument rack 
      (instrument rack for the jet pump) at the southwest corner on the 
      first floor of Unit 4 Reactor Building (found approx. at 10:30 pm on  
      January 31) (Water from the reactor well: approx. 6 L) 
  - At 10:00 am on February 1, we started transferring the water  
    accumulated in the basemen of Turbine Building at Unit 6 to temporary  
    tanks. 

· 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 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 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 10:00 am, February 1, 2012) (PDF 388KB) 
Appendix: Past Progress (From March 11, 2011 to July 31, 2011) (PDF 225KB) 
 
* Revised past progress