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 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). During 
   our observing the plant parameter after the decreasing the flow rate of 
   feed water system on February 22, we found that one thermometer in the 
   lower part of the RPV indicated the different movement from others. 
   From 0:21 pm to 2:48 pm on February 23, we investigated the concerned 
   device. As the result of the measurement of DC resistance, we found no 
   breaking wire and availability of the thermometer. But we confirmed 
   that the DC resistance of it became higher than the previous 
   measurement test data. We will evaluate the soundness of the concerned 
   device and examine correspondence in future. We make sure no 
   re-criticality state because there were no significant changes at the 
   monitoring post and as the result of the sampling for the Gas Control 
   System of the Unit 2, we confirmed that the concentration of Xe-135 was 
   below the detectible limit. 
   ·At 11:00 am on February 28, the temperature of the lower part of the 
    RPV (top of the lower head 135°) : approx. 44.6 °C 
   ·At 11:00 am on February 28, the temperature of the lower part of the 
    RPV (top of the lower head 270°) : approx. 40.9 °C (reference) 
 
 - At 10:50 am on February 27, we start the transfer of the accumulated 
   water from the basement of Turbine Building of Unit 2 to the 
   Centralized Radiation Waste Treatment Facility (Process Main Building). 
   At 1:41 pm on February 28, we stopped transfer due to switching of the 
   transfer pump. At 2:00 pm on the same day, we restarted the transfer. 
 
 - At 2:09 pm on February 25, we start the transfer of the accumulated 
   water from the basement of Turbine Building of Unit 3 to the 
   Centralized Radiation Waste Treatment Facility (Miscellaneous Solid 
   Waste Volume Reduction Treatment Building [High Temperature Incinerator 
   Building]). At 1:45 pm on February 28, we stopped transfer due to 
   switching of the transfer pump. At 1:56 pm on the same day, we 
   restarted the transfer. 
 
·Fukushima Daini Nuclear Power Station: 
  Units 1 to 4: shutdown due to the earthquake 
 
 - At 10:06 am on December 27, 2011, we opened the airlock for the workers 
   (a hatch for going in and out of the PCV) and started visual inspection. 
   We started cleaning and decontamination on January 10, 2012 and visual  
   inspection of the primary containment vessel and the equipments in the 
   vessel on February 7. The inspection has been completed on February 28. 
   As a result, no leakage of the reactor coolant and no damage or strain 
   of the equipments and the pipe arrangements were confirmed. Thus we 
   confirmed that there was no influence on the capability for the cold 
   shutdown. Although peeling paints and rusts on the surface of the 
   equipments were found due to the effect of high temperature and 
   humidity until the cold shut down, any of those has had no influence on 
   the capability for the cold shutdown. We plan to conduct detailed 
   inspections of the equipments, including the internal equipments of the 
   primary containment vessels. 
 
·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 3:00 pm on February 28, 2012) (PDF 526KB) 
Appendix: Past Progress (From March 11, 2011 to July 31, 2011) (PDF 225KB) 
 
* Revised past progress