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 since the previous press release 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)

 *On January 11, 2012, we conducted sampling survey of the gas in the Unit 
  2 primary containment vessel gas management system. As a result of the  
  analysis, we confirmed that at the gate of the system the density of 
  xenon 135 was below the measurable limit (1.1 x 10-1 Bq/cm3) and thus it 
  was lower than the judgment criteria for the recriticality, 1Bq/cc. 

 *From 10:15 am on January 12 to 12:50 pm on the same day, we transfer 
  water from Unit 3 water storage tank to basement of Unit 2 turbine 
  building.

 *At 10:30 am on January 12, 2012, we adjusted the amount of the water 
  injection from approx. 1 m3/h to 0 m3/h (the reactor feed water system), 
  from approx. 8.2 m3/h to approx. 9.0 m3/h (the core spray system) in 
  order to switch the injection pipe arrangement of the reactor feed water 
  system for preparation for test operation of the reactor injection pump 
  in the turbine building. At 11:00 am, we adjusted the amount of the 
  water injection from approx. 0 m3/h to 1 m3/h (the reactor feed water 
  system), from approx. 9.0 m3/h to approx. 8.0 m3/h (the core spray 
  system) since the switch work was completed. 

 *At 11:07 am on January 12, 2012, we adjusted the amount of the water 
  injection from approx. 4.6 m3/h to approx. 4.5 m3/h (the reactor feed 
  water system), from approx. 1.6 m3/h to approx. 2.0 m3/h (the core spray 
  system) since we confirmed fluctuation of the amount of the water 
  injection into the reactor. 

 *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. In the 
  inspection conducted on January 12, we confirmed a puddle in the Unit 3 
  transformer cable duct for activation. As a result of nuclide analysis, 
  the radioactive concentration of the puddle water is below measurable 
  limit for I-131, 4.9x101Bq/cm3 for Cs-134, 6.9x101Bq/cm3for Cs-137 
  (Total of the major three nuclides reaches 100Bq/cm3). As indicated 
  above, it was found out that the water contained relatively 
  highly-concentrated radioactive materials. We presume that the 
  accumulated water in the building is not likely to have flown into the 
  cable duct since the water level (water surface) of the puddle is 
  higher than that of the accumulated water in the building. 

 *At 1:30 pm on January 12, 2012, we started the injection of hydrazine 
  [corrosion inhibitor] into the Unit 4 spent fuel pool through the 
  circulating cooling system. 

·Fukushima Daini Nuclear Power Station:
  (Units 1 to 4: shutdown due to the earthquake)

 *On November 7 2011, we started inspection work of the main turbine of
  Unit 4 in order to confirm the facilities's status after the quake.On 
  January 11 2012, we finished visual inspection in the low pressure 
  turbine (A) and the high pressure turbine. Although we found not only 
  some cracks caused by normal operation but also some contact traces, 
  which is located at moving*1 and stationary blade*2 of the low 
  pressure turbine (A) and the high pressure turbine and oil thrower 
  bearing, caused by the Tohoku-Chihou-Taiheiyou-Oki Earthquake, we 
  confirmed they are minimal damage and we made sure there was no security 
  issues. 

*1 : moving blade
     The moving blade is rotated by the intake steam, which is set at
     rotor
*2 : stationary blade
     The stationary blade is structure, which is fixed on the casing in
     order to guide the intake steam to the moving blade effectively.

·Kashiwazaki Kariwa Nuclear Power Station: Units 5, 6: under normal
 operation
   (Units 1 to 4 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 will be some minus factors such as the regular
inspection of Unit 5 at Kashiwazaki-Kariwa Nuclear Power Station. On the
other hand, there will be 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. 

Appendix: Past Progress (As of 3:00 pm, January 12, 2012) (PDF 325KB) 
Appendix: Past Progress (From March 11, 2011 to July 31, 2011) (PDF 225KB) 

* Revised past progress