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 9:14 pm on May 28th, we found that one temporary residual heat
removal system seawater pump of Unit 5 stopped. At 8:12 am on May 29th,
replacement work to the spare pump started.
- At 1:28 pm on May 28th, we started freshwater injection to the spent
fuel pool of Unit 3 by the Fuel Pool Cooling and Filtering (Clean up)
System (we also injected hydrazine from 1:42 Pm to 2:40 pm), and
finished at 3:08 pm.
- From 4:47 pm to 5:00 pm on May 28th, we conducted the leak test for Unit
1 spent fuel pool by fresh water injection using Fuel Pool Cooling and
Filtering System.
- At 8:54 pm on May 28th, we stopped water injection to the reactor of
Unit 3 through the fire extinction system.
- At 5:56 pm on May 28th, we started water spray to the spent fuel pool of
Unit 4 by the concrete pumping vehicle (we also injected hydrazine from
6:02 pm to 7:45 pm), and finished at 7:45 pm.
- From 9:00 am on May 28th, we started transferring accumulated water on
the basement of Unit 6's turbine building to temporarily-installed tank
again,and finished at 7:00 pm.
- On May 28th, we sprayed dust inhibitor for the area of 4,375m2, over the
surrounding area of Incombustibles Treatment Facility.
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
[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 318KB)
* Revised past progress