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) 
 
* Below is the status of TEPCO's major facilities due to the 6.3 magnitude 
  earthquake centered in the Fukushima-Hama-dori earthquake which occurred 
  at approximately 2:07 pm, April 12th 2011, 
  - No shutdown of the off-site power of the units 1-6 
  - No abnormalities in water injection to the reactor of the units 1-3, 
    nitrogen gas injection to the reactor containment vessel of unit 1 
  - No abnormalities were detected in the parameter of each of the units. 
  - No abnormalities in the data taken from the monitoring before as well 
    as after the earthquake. 
  - We advised workers at outdoor to evacuate in the key earthquake-proof 
    building after the quake We confirmed that there were no injured 
    workers, we cancelled the evacuate advice at 3:05 on April 12th, 2011. 
* From 4:26PM, April 12th, we began spraying water to the spent fuel pool 
  of Unit 3 by a concrete pumping vehicle and finished at 5:16PM, April 
  12th. 
* From 0:30AM, April 13th, we began spraying water to the spent fuel pool 
  of Unit 4 by a concrete pumping vehicle and finished at 6:57AM, April 
  13th. 
* From 7:35PM, April 12th, we began transferring puddle water in the 
  trench of Unit 2 to the condenser of Unit 2. 
 
* At approx. 9:30 am, April 2, we found that there was accumulated water 
  in the shaft (concrete product) for storing power cables near the intake 
  of water for Unit 2, that the spatial radioactive dose was over 
  1,000mSv/h and that the water spilled into the sea from the crack 
  (approx. 20 cm) on the side of the shaft. Since there is a joint between 
  the trench of Unit 2 and the shaft, based on the possibility that the 
  accumulated water in the turbine building of Unit 2 was spilled into the 
  sea through this joint, we injected fresh concrete to the shaft twice, 
  however, we could not observe a change in the amount of water flowing 
  into the sea. Therefore, we considered that a new method to stop the 
  water and determined to use the polymer. On April 4, we injected the 
  tracer from the vertical shaft to examine the flow path. We did not 
  observe reduction of flow or change of color of water leaked. We checked 
  the drawings and confirmed the route. At the same time, we checked the 
  situation of the pit in detail and considered the possibility that the 
  water was not from the pit, rather, from the joint between the piping 
  upstream of the pit and the duct, then the water seeped through a layer 
  of gravel below the piping. In order to stop that seepage from the layer 
  of gravel, we decided to conduct the water sealing to the bedrock around 
  the piping. We arranged for the specialist and gathered equipments. On 
  April 5, liquid glass was injected to the bedrock. Tracer was put through 
  the two new holes drilled near the pit to investigate the water flow. At 
  2:15 pm, April 5, it was observed the water with tracer came out from the 
  crack on the concrete wall of the pit. At 3:07 pm, April 5, injection of 
  coagulant from the holes was initiated and we have confirmed the outflow 
  from the crack on the concrete wall of the pit has stopped at 5:38 am, 
  April 6. We confirmed the water level has not been rising in the turbine 
  building of unit 2. On April 6, a countermeasure by using rubber plate 
  and fixer was implemented to prevent discharge of radioactive materials, 
  and we are continuously monitoring for any existence of leakage. From 
  3:00pm April 5, a construction of installing large sandbags around the 
  pier to prevent the outflow of the contaminated water from station's 
  port on the south side to the ocean was started. In order to prevent 
  water containing radioactive materials from spilling from a plant's port 
  to the sea, we installed 120 meter wide double silt fences around a 
  breakwater on the south of the station at 10:45 am on April 11. From 
  April 12th, we are working on installing an iron plate in front of the 
  screen of Unit 2. 
  Iodine and Cesium were detected from the water sampled in the pit and in 
  the sea near the water discharge. Other nuclide will be re-evaluated. In 
  addition, from April 2nd, we will implement sampling at 15km offshore 
  Fukushima Daiichi and Fukushima Daini Nuclear Power Stations(3 points 
  have been added since April 5) and will evaluate these samples 
  comprehensively. 
 
* April 12th we conducted sampling water at fuel pool, to assess the 
  situation of spent fuel in fuel pool. We will analyze nuclide from now. 
 
* From 3:00 pm, April 1, we started spraying anti-scattering material in 
  order to prevent diffusion of radioactive materials. This attempt was 
  conducted on a trial basis at the mountain side area of the common spent 
  fuel pool in the range of 500m2. The spraying finished at 4:05 pm. On 
  April 5, we also sprayed the anti-scattering material on a trial basis 
  at the east and south sides of Unit 4, and the mountain side area of the 
  common spent fuel pool in the range of 600m2. On April 6 we sprayed at 
  the mountain side area of the common spent fuel pool in the range of 
  approx. 600m2, Approx. 680 m2 on April 8, approx. 550 m2 on April 10, 
  approx. 1,200 m2 on April 11 and approx. 700 m2 on April 12 on a trial 
  basis. 
 
Fukushima Daini Nuclear Power Station: 
  Units 1 to 4: shutdown due to the earthquake 
- There was no impact from the 6.3 magnitude earthquake whose epicenter 
  was at Fukushima-Hama-dori which occurred at approximately 2:07 pm, 
  April 12th 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 6.3 magnitude earthquake whose epicenter 
  was at Fukushima-Hama-dori which occurred at approximately 2:07 pm, 
  April 12th 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 104KB) 
 
* Revised past progress