Corporate Information

Press Release (Feb 05,2012)
Status of TEPCO's Facilities and its services after the Tohoku-Chihou-Taiheiyou-Oki Earthquake (as of 10:00 am, February 5)
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 
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)
 - At about 7:10 pm on February 4, a worker of a partner company which 
   operated the water desalinations said he was in bad shape. He was 
   examined and treated at the emergency medical clinic of Unit 5&6 and 
   judged that he required an emergency transfer. Then he was transferred 
   to the J Village at 9:06 pm. After that, at 9:50 pm, he was transferred 
   to Iwaki Kyouritsu Hospital from the J Village. At this moment, the 
   doctors examine and treat. The patient does not have any radiation 
 - At 10:56 pm on February 4, "Abnormal state (low pressures) in suction 
   pressure of RO high pressure pump" triggered the alarm in the desalting 
   facility for spent fuel pool of Unit 2, and the facility automatically 
   stopped. Because all isolation valves of the system have been closed due 
   to the interlock and the alternative cooling system for spent fuel pool 
   is continuously operated, it does not affect the cooling for the spent 
   fuel pool. In addition, as a result of site check, it was confirmed that 
   any leakage from the facility was not found. The cause is now under 
 - At 9:49 am on February 5, we started water transfer from the basement of 
   turbine building of Unit 3 to Centralized Radiation Waste Treatment 
   Facility (Miscellaneous Solid Waste Volume Reduction Treatment Building 
   [High Temperature Incinerator Building]).
 - Since February 2, the tendency of temperature has risen at the bottom of 
   PCV. Thus, at 7:20 pm on February 3, we changed the injection amount 
   into Unit 2 reactor through feed water system from approx. 2.9 m3/h to 
   approx. 4.9 m3/h and changed that though reactor core spray system from 
   approx. 5.8 m3/h to approx. 3.8 m3/h (which means setting them at those 
   of before flow adjustment on February 1). After that, we have observed 
   the tendency of temperature at the upper head of the bottom of PCV. 
   Because we found the temperature has risen again (approximate 66.1 °C at 
   11:00 pm on February 4), at 12:52 am on February 5, we changed the water 
   injection volume to Unit 2 reactor through the feed water system from 
   approx. 4.8 m3/h to approx. 5.8 m3/h (the water injection through the 
   reactor core spray system remains approx. 3.8 m3/h). At this moment, the 
   temperature indicates 67.4 °C (as of 5:00 am on February 5). we will 
   monitor it continuously.
· Fukushima Daini Nuclear Power Station:
  (Units 1 to 4: shutdown due to the earthquake)
· Kashiwazaki Kariwa Nuclear Power Station: Units 6: under normal 
  (Units 1 to 5 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 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, February 5, 2012) (PDF 403KB) 
Appendix: Past Progress (From March 11, 2011 to July 31, 2011) (PDF 225KB) 

* Revised past progress 
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