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 3, 2012, we conducted dust sampling at the upper part of 
    Unit 1 reactor building at emission filter of Unit 1 reactor building 
    cover. 
  * Since December 22, 2011, the atmospheric temperatures at point C of
    Unit 1 Primary Containment Vessel (PCV) monitored by the Containment
    Atmospheric Monitoring System had risen (the atmospheric temperature
    of the PCV on December 22 was approx. 38°C, at 7 pm on December
    27 was approx. 49°C).  The other temperatures had not risen, so
    we conducted a survey checking the reliability of the meters from 9
    am to 10 am on December 28, and we confirmed that there are no
    problems.  From 11:00am to 12:15pm on the same day, we adjusted the
    volume of Nitrogen injection, from approx. 8 m3/h to approx.18 m3/h,
    and emission of the gas management system, from approx. 23 m3/h to
    approx.30 m3/h, in order to identify the cause by monitoring the
    system with the same injection and emission volume as before December
    22. The temperature went up to approx. 54.6°C at 6 pm on
    December 28 and fell to approx. 42.3°C at 11:00 am on January 4, 
    2012. Temperatures at other two points also indicated slight
    increases but are currently in the stable status.
    Point D: (Maximum) approx. 35.8°C at 5:00 pm on December 29, 2011 →
             approx. 32.1°C at 11:00 am on January 4, 2012. 
    Point E: (Maximum) approx. 40.0°C at 5:00 pm on December 29, 2011 →
             approx. 35.1°C at 11:00 am on January 4, 2012. 
    We will continuously conduct the survey for the cause of temperature
    increase and surveillance of the plant.

  * At 9:13 am on January 4, 2012, we suspended the second cesium
    adsorption apparatus due to reverse cleaning of the filters because
    the amount of disposal water of the second cesium adsorption
    apparatus decreased generally since the start of operation on
    December 27, 2011. At 2:36 pm on the same day, we restarted to 
    operate the second cesium adsorption apparatus and confirmed that the 
    flow rate had steadied at 2:48 pm. 

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

· 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 54.9 GW (at the end of December), 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 - 3.4 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 4, 2012) (PDF 381KB) 
Appendix: Past Progress (From March 11, 2011 to July 31, 2011) (PDF 225KB) 
 
* Revised past progress