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.
*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 4:18 pm May 8th, we started draining the water from the condenser in
the turbine building as a preparation for the work to inject the water
into the reactor of Unit 3 using the feed water system. At 5:41 am May
10th, we finished the drainage.
-At 4:05pm May 9th, we started spraying the water to the spent fuel pool
of Unit 4 by the concrete pumping vehicle (We added hydrazine for the
period from 4:11pm to 6:38pm). At 7:05pm on the same day, we finished
spraying.
-From April 22nd, we installed the thermocouple-type thermometer and the
radiation dose meter to the concrete pumping vehicle at the spent fuel
pool of Unit 4 and we investigated the water level of pool, water
temperature, radiation dose, water analysis etc. As part of the
investigation, we sampled approx. 280 ml of water from the pool on May 7
and conducted nuclide analysis on May 8. As a result of the analysis,
cesium 134, 137 and iodine 131 were detected.
-At 2:00pm May 9th, we resumed transfer of Unit 6 turbine building
basement water to a temporary tank. At 5:00pm on the same day, we stopped
the pump (approx. 60m3).
-May 9th: we sprayed the dust inhibitor to areas including nearby the
solid waste storage facility (approx. 5,250m2) using the conventional
method.
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 Unit 2 and 4: Shutdown due to the earthquake
-Hitachinaka Thermal Power Station Unit 1: 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-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 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.
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Appendix:Past Progress (PDF 286KB)
* Revised past progress