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. 
 
* 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) 
 
  - According to the investigation on trenches on January 19, 2012, high 
    density contaminated water inside was found inside circulating water 
    pump discharge valve pit of Unit 2 water pump room. Therefore, on 
    February 20, we started transfer of the accumulated water from the 
    pit to the basement of Unit 2 Turbine Building. At 9:43 am on 
    February 22, we restarted the transfer and stopped it at 3:58pm on 
    the same day. 
 
  - With regard to the water injection volume for Unit 2 reactor, which 
    was increased with temperature figure raising, we have gradually 
    adjusted it to the original volume before temperature increasing 
    (Feed water system: approx. 3.0m3/h, core spray system: approx. 
    6.0m3/h). As no abnormality has been observed in the variation of the 
    plant parameter after the change in the flow rate on February 20, at 
    8:17 pm on February 22, we changed the water injection volume from 
    feed water system from approx.4.0m3/h to approx. 3.0m3/h (The water 
    injection level from core spray system is continuing at approx. 
    6.0m3/h). 
 
  - At 9:17 am on February 20, we stopped transferring the accumulated 
    water at the basement of Unit 2 Turbine Building to Centralized Waste 
    Treatment Facility (Miscellaneous Solid Waste Volume Reduction 
    Treatment Building [High Temperature Incinerator Building]) in order 
    to switch the transfer pumps, and at 9:39 am on February 20, the 
    transfer restarted. At 8:28am on February 23, the transfer stopped. 
 
  - On February 22, 2012, we conducted gas sampling survey of the PCV gas 
    control system of Unit 2 and confirmed that Xenon 135 was below the 
    detection limit (1.1 x 10-1Bq/cm3) at the inlet of the system and 
    also below 1 Bq/cm3 that is a threshold of recriticality. 
 
· 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] 
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. 
 

 
 
Appendix: Past Progress (As of 10:00 am on February 23, 2012) (PDF 442KB) 
Appendix: Past Progress (From March 11, 2011 to July 31, 2011) (PDF 225KB) 
 
* Revised past progress