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)
-At 2:00 pm on 21st, we started transfer of accumulated water in the
basement of Unit 6 into temporary tanks.
-As for the outflow of contaminated water from near the intake of Unit 3
(leakage was stopped at 6:45 pm on the same day), we estimated that the
volume of outflow was approx. 250m3 and the radioactive dose is approx.
2 x 1013 Bq on the assumption that it flew at the same rate for approx.
41 hours (from 2:00 am on May 10 to 7:00 pm on May 11). As preventive
measures and measures to prevent scattering to the outside of the port,
we are planning to block the pits the contaminated water might run flow
out from, isolation of pump rooms for Units 1 to 4, installation of
sandbags containing zeolite inside of the intakes, and installation of a
circular purification equipment to the screen area. In parallel, we will
continue monitoring sea water inside and outside of the port and
reinforce the monitoring system.
-At 9:35 on May 21st, Mega Float arrived at the shallow draft quay in
Fukushima Daiichi Nuclear Power Station.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 320KB)
* Revised past progress
