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) 
 
 -At 1:29 pm on February 13, we started injection of hydrazine to spent 
  fuel pool of Unit 2 through the circulating cooling system. At 3:07 pm 
  on the same day, the injection ended. 
 
 -Since February 2, a significant temperature rise at the bottom of the 
  PCV of Unit 2 has been observed. We investigated the thermostat from 
  2:02 pm to 2:54 pm on February 13. With that investigation, we think the 
  device seems broken due to possible break of wire with the fact that the 
  direct current ohmic value is higher than ordinary status. The 
  thermostat indicated 342.2°C (Reference value), and later we will 
  finalize the decision of the soundness of the device. 
 
 -At 11:12 am and 5:10 pm on February 13, we sampled the gas of the gas 
  control system of Unit 2 Primary Containment Vessel. The density of 
  Xenon 135 at the entrance of the system was below the detection limit*. 
  Since it is below 1Bq/cm3, which is the threshold for judging 
  re-criticality, we confirmed the reactor didn't go re-critical 
  *The detection limit (11:12 am 9.9x10-2Bq/cm3) (5:10 pm 1.0x10-1Bq/cm3). 
 
 -Because of the finding of accumulated water included radioactive 
  materials at the trench between the Process Main Building and the 
  Miscellaneous Solid Waste Volume Reduction Treatment Building[High 
  Temperature Incinerator Building](December 18, 2011), we started the 
  inspection of other trenches at the site on January 11. The inspection 
  done on February 13, the result (quick estimation) of inspection is as 
  follows(place and nuclide analysis): 
 
 -Water treatment piping shaft (East side of Administration Office 
  Building) 
  I-131: Below the detection limit, Cs-134: 2.2x100Bq/cm3, Cs-137: 
  3.3x100Bq/cm3 
 
 -Water treatment piping shaft (East side of filtrate water tank) 
  No pool of water is confirmed. 
 
 -At 8:52 am on February 14, water flow at the 2nd Cesium adsorption 
  apparatus tends to decrease, so we stopped it to wash the inside of the 
  device by reversing the water flow. 
 
 -At 10:00 am on February 14, we started to transfer accumulated water at 
  the basement of turbine building of unit 6 to temporary tank. 
 
·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 14, 2012) (PDF 427KB) 
Appendix: Past Progress (From March 11, 2011 to July 31, 2011) (PDF 225KB) 
 
* Revised past progress