Due to the Tohoku-Chihou-Taiheiyou-Oki Earthquake which occurred on March
11th 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 17th, we have put together the roadmap towards restoration from the
accident. By bringing the reactors and spent fuel pools to a stable
cooling condition and mitigating the release of radioactive materials, we
will make every effort to enable evacuees to return to their homes and for
all citizens to be able to secure a sound life.

Below is the status of TEPCO's major facilities.
*Updates from previous press release are underlined. 

[Nuclear Power Station]
Fukushima Daiichi Nuclear Power Station: 
    Units 1 to 3: shutdown due to the earthquake 
    (Units 4 to 6: outage due to regular inspections) 

-2:00 pm on May 1st : the transfer of accumulated water in Unit 6 turbine 
 building to a temporary tank was started. 
-April 30th: we upgraded the voltage of offsite power for Unit 3 and 4 
 from 6.9 kV to 66 kV in order to secure power supply capacity in future 
 as well as to enhance insulation level. 
-We decided to blockade each vertical shaft as a countermeasure against 
 Tsunami, and have started the work for Unit 2 and 3 since May 1st. (We 
 already blockaded the vertical shafts of Unit 4 on April 6th.) 
-May 1st: we sprayed the dust inhibitor to the area on the south side of 
 the reactor building of Unit 4 using the unmanned crawler dump truck, 
 approx. 1,000 m2 
      In previous announcements, we described the building as "the turbine 
      building of Unit 4," but it was an error. We meant "the reactor building 
      of Unit 4." We would like to apologize for the error and correct it. 

-May 1st: we sprayed the dust inhibitor to the slope surrounding the 
 former Administration Office Building using the conventional method. 
-May 1st: we have confirmed that the effective exposure dose from January 
 1st, 2011 to March (the 4th quarter of the 2010 fiscal year) of a female 
 employee who has been in the restoration work after the 
 Tohoku-Chihou-Taiheiyou-Oki Earthquake is 7.49 mSv, which is in excess of 
 statutory dose limits (5 mSv / 3 months). The employee will be taking 
 medical examination on May 2nd. 

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

Kashiwazaki Kariwa Nuclear Power Station: 
    Units 1, 5, 6, 7: normal operation 
    (Units 2 to 4: outage due to regular inspection) 

[Thermal Power Station] 
-Hirono Thermal Power Station Units 2 and 4: Shutdown due to the
 earthquake
-Hitachinaka Thermal Power Station Unit 1: Shutdown due to the earthquake

[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.

[Avoidance of further Implementation on Planned Rolling Blackouts and
Request for Conserving Electricity Consumption] 
Currently, we are working to restore electricity supply after our nuclear
and thermal power facilities were severely damaged by
Tohoku-Chihou-Taiheiyou-Oki Earthquake. The widespread understanding and
cooperation of our customers to conserve electricity have contributed to
the improvement of this tight power supply-demand balance situation.
Amidst this backdrop, since the electricity supply will be able to balance
with the demand for the time being, we have decided not to implement
further rolling blackouts in principle.
However, we sincerely ask for your continued cooperation in reducing
electricity consumption due to the possible increase in demand caused by
warmer weather or unexpected trouble at power stations that are currently
being restored to service. In case the electricity supply-demand balance
becomes tighter than expected, we may regrettably need to restart the
implementation of rolling blackouts, with prior notice. We kindly ask for
your cooperation.
We will do our best to maintain this policy of avoiding further
implementation of rolling blackouts during the summer.
*We partially corrected on May 3. 

Appendix:Past Progress (PDF 111KB)