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 and then we updated the roadmap considering the current
situation, on May 17th. 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)
-On May 23rd, we changed the rate of water injection to Unit 3 through the
fire extinction system piping arrangement from approximately 6 m3/h to
approximately 5 m3/h at 11:31 am and from approximately 5 m3/h to
approximately 4 m3/h at 2:08 pm.
-On May 23rd, we improved the working environment around a monitoring post
(No.3) out of 8 posts located at the border of the plant site by
decontaminating the detectors and installing shields to the lower half of
detectors.
-On May 23rd, we sprayed dust inhibitor areas including nearby
Noninflammales Treatment Facility, using the conventional method.
-At approximately 10:20 am on May 23rd, a partner company's worker who was
unloading a tank for the treatment water at the carry-in gate for large
stuff, the 1st floor of On-site Bunker Building, had his left hand
injured. After having diagnoses at the medical room of Fukushima Daiichi
Nuclear Power Station and at J village, he was transferred to Iwaki
Kyouritsu Hospital by an ambulance. No contamination to his body was confirmed.Fukushima Daini Nuclear Power Station:
Units 1 to 4: shutdown due to the earthquakeKashiwazaki 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 Unit 2 and 4: 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.
[Perspective of Power Supply and Demand Balance in this Summer]
We have worked to restore electricity supply after our nuclear and thermal
power facilities were severely damaged by Tohoku-Chihou-Taiheiyou-Oki
Earthquake. This time, we revised that the supply capacity in this summer
would increase because we could plan to secure an additional capacity.
However, in order to maintain the policy of avoiding further
implementation of rolling blackouts during the summer, in addition to the
above increase of the supply capacity, we sincerely ask for your continued
cooperation in reducing electricity consumption. Now we are creating
concrete measures considering "Outline of Countermeasures for Power
Supply and Demand During Summertime" presented by the Electricity
Supply-Demand Emergency Response Headquarters of the Japanese government.
(Previously Announced)
In the event that an unplanned outage such as excessive continuous
operation in old plants and a sudden increase of power demand due to
unusual hot temperature occur, there is a possibility to affect a stable
power supply. In order to maintain the policy of avoiding rolling
blackouts, we steadily implement to install additional power capacity we
have planed, and we continuously do our best efforts to secure supply
capacity. 
Appendix: Past Progress (PDF 309KB)
* Revised past progress
