Due to the Tohoku-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. 

Below is the status of TEPCO's major facilities.
*New items 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 approximately 6:38 AM, April 12th, a fire broke out at the 
 distribution switchboard   containing batteries located in the 
 sampling equipment switchbox situated close to the south water 
 discharge channel for Units 1-4. The self defense fire fighting team 
 began extinguishing this fire soon after it broke out. At approximately 
 6:45 AM, this incident was reported to the Futaba fire authorities. 
 Efforts to contain the fire were successful and there are now no more 
 flames or smoke emanating from the switchbox. 
 This incident did not impact the external release of radioactive 
 substances or the cooling capability of the reactor. The data taken from 
 the monitoring of the environment in the area did not change. 

* Below is the status of TEPCO's major facilities due to the 7.1 magnitude 
 earthquake centered in the Fukushima-Hama-dori earthquake which occurred 
 at approximately 5:16 pm, April 11th 2011,  
-Due to the shutdown of the off-site power, water injection to the 
 reactor of the units 1-3 was suspended. It was resumed at approximately 
 6:04 pm after restoration of off-site power. 
-No abnormalities were detected in the parameter of each of the units. 
-Nitrogen gas injection to the reactor containment vessel of unit 1 was 
 suspended and resumed at 11:34 pm. 
-The water level of units 1-3's pit did not change significantly. 
-We confirmed that there were no injured workers inside of the buildings. 

* On March 21st and March 23rd to April 10th, we detected radioactive 
materials from the seawater around the discharge canal of the station. 
The data of the detected three nuclides (Iodine-131, Cesium-134 and 
Cesium-137) was reported as fixed data. Other nuclide figures are to be 
re-evaluated based on improved measures for recurrence prevention which 
have been prepared in accordance with a strong warning issued by NISA on 
April 1st.

* On March 20th, 21st and March 23rd to April 10th, we detected radioactive 
materials in the air collected at the site of Fukushima Daiichi Nuclear 
Power Station. The data showed that three nuclides were detected 
(Iodine-131, Cesium-134 and Cesium-137) and these have been reported as 
fixed data. Other nuclide figures are to be re-evaluated based on improved 
measures for recurrence prevention which were prepared in accordance with 
a strong warning issued by NISA on April 1st.

* From 3:00 pm, April 1st, we started spraying an inhibitor in order to 
prevent the diffusion of radioactive materials. This attempt was conducted 
on a trial basis at the mountain side area of the common spent fuel pool 
at the range of 500m2. The spraying finished at 4:05 pm. On April 5th, we
also sprayed the east and south side and the mountain side area of the
common spent fuel pool of unit 4 at a total range of 600 m2. On April 6th,
spraying was conducted at the mountain side area of the common spent fuel
pool at a range of 600m2, on April 8th, 680m2, and on April 10th, 550m2. 
 On April 11th, we conducted spraying at a range of 1,200m2. 

Fukushima Daini Nuclear Power Station: 
 Units 1 to 4: shutdown due to the earthquake 
- There was no impact from the 7.1 magnitude earthquake whose epicenter 
  was at Fukushima-Hama-dori which occurred at approximately 5:16 pm, 
  April 11th 2011, 

Kashiwazaki Kariwa Nuclear Power Station: 
 Units 1, 5, 6, 7: normal operation 
 (Units 2 to 4: outage due to regular inspection)
-There was no impact from the 7.1 magnitude earthquake whose epicenter 
 was at Fukushima-Hama-dori which occurred at approximately 5:16 pm, 
 April 11th 2011, 

[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
- Kashima Thermal Power Station Unit 6: 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-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, in principle, we have decided not to implement 
 further rolling blackouts. However, we must 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, as stated, we may reluctantly restart the implementation of 
 rolling blackouts. 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.
 

Appendix: Past Progress(PDF 102KB) 
 
* Revised past progress