Corporate Information

Press Release (Apr 21,2011)
Status of TEPCO's Facilities and its services after the Tohoku-Chihou-Taiheiyou-Oki Earthquake (as of 4:00PM, April 21st)
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. 
*New items have been 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 approx. 9:30am, April 2nd, we found that there was accumulated water in the shaft (concrete product) for storing power cables near the intake of water for Unit2, that the airborne radiation 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. April 5th, 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 on April 6th. *We had used grout to stop the outflow, and finished the work on April 21st. We are also planning to conduct countermeasures to prevent the outflow of accumulated water from the pit. *The amount of high density contaminated water spilled from the screen at the side of turbine building, Unit 2 is estimated to be approximately 520 m3 with 4.7*1015 becquerel, provided that the water flowed continuously at the same rate from April 1st to April 6th. In order to prevent water containing radioactive materials from spilling from a plant's port to the sea, we installed iron plates in front of the screen of Unit 2, and also installed silt fences in front of the screens of Unit 1 to 4. Moreover, we installed a total of 62 large sandbags on the south side of the ocean and threw in ten sandbags including zeolite in front of the screen rooms of Units 1 to 4. In addition, carrying out measures such as steel sheet pile and radioactive material absorber at around south breakwater are under consideration. *From 0:00am on April 21st, we sprayed dust inhibitor at the mountainside area of the common spent fuel pool/ approx. 1,300 m2 , and at the mountainside area of the medium voltage switchgear/ approx. 5,100 m2 in order to prevent diffusion of radioactive materials. The work finished at 3:00 pm on April 21st. *From 11:43am to 0:50pm on April 21st, an unmanned helicopter flew over Units 1 to 4 to confirm the conditions around the building of those Units.
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 -Kashima Thermal Power Station Unit 6: resumed generating electricity at 4:10 am on April 20th
[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 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, 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.
Appendix: Past Progress (PDF 141KB)
* Revised past progress
back to page top

to TOP