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, we have compiled the roadmap towards restoration from the 
accident and then we updated the progress status of roadmap considering the 
current situation, on July 19. Accomplishment of the Step1 target 
"Radiation dose is in steady decline" has been confirmed.
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) 

- At 10:00 am on August 11, we started transferring of accumulated water 
  from inside the Unit 6 turbine building to temporary tanks. At 4:00 pm on 
  the same day, we finished transfer.
- At 3:00 pm on August 11, we confirmed that the circuit breaker supplying 
  power to the charger for control power of the temporary power board for 
  Units 1 and 2 was open. At 4:00 pm on the same day, we confirmed that the 
  voltage of the back-up battery for control power dropped. At 1:21 am on 
  August 12, we replaced the battery and the charger and resumed receiving 
  power.
- At 3:22 am on August 12, an M 6.0 earthquake with the seismic center at 
  offshore of Fukushima prefecture occurred. Events confirmed are as 
  follows:
  •The boiler for the vaporization and condensation system at the water 
   treatment facility stopped. At 3:42 am on the same day, we restarted 
   the boiler and resumed vaporization and condensation.
  •At 3:52 am on the same day, we confirmed that the reactor water 
   injection rate for Unit 1 dropped to 3.2m3/h. At 3:52 am on the same 
   day, we adjusted the rate to 3.9m3/h. Reactor water injection for Units 
   1 to 3 is continuing.
  •At 5:06 am on the same day, we confirmed that one out of two of the 
   temporary control air compressor, Unit 1 stopped. As we could not 
   restart this, at 6:44 am on the same day, we started the back-up 
   diesel-driven air compressor. There is no impact on the nitrogen gas 
   injection for Unit 1.
  •At 5:27 am on the same day, we found very small volume of water leakage 
   from a hose, primary system, alternative Spent Fuel Pool cooling system 
   located in the rad waste treatment building, Unit 4. We are planning to 
   replace the hose.

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

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

[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.

[Perspective of Power Supply and Demand Balance in this Summer]  
In regard to the supply side in this summer, taking in account of the 
acceleration of restoration schedule for Hirono Thermal Power Station, more 
purchase of privately generated power, and excluding the power supply from 
60Hz areas which had been planned (due to the current difficult situation), 
supply capacity outlook is amended to 56.1GW at the end of August.
Also, in order to support the supply and demand balance in the Tohoku area, 
which suffered severe damage from the quake, we would like to supply 
maximum of 1.4GW to Tohoku Electric Power Company by thoroughly 
implementing both supply and demand countermeasures. The supply capacity in 
this regard will be 54.7GW at the end of August.

Estimated peak demand of 55GW for this summer is 5GW lower than that of 
last year. This incorporates the saving of electricity from "Outline of 
Countermeasures for Power Supply and Demand During Summertime" and 
restoration from decrease of production due to the quake.

As the occurrence of unplanned outage of aged thermal power stations or 
sudden increase of demand due to unexpected high temperature during summer 
may cause difficulties in maintaining stable demand supply balance, in 
order to continue to avoid rolling blackouts, we will steadily maintain 
supply capacity, and continue our efforts on reliable operation and 
maintenance of power facilities.

We apologize for the inconvenience this may cause and appreciate for your 
cooperation to save electricity.

Appendix: Past Progress (PDF 246KB)

* Revised past progress