Due to the Tohoku-Chihou-Taiheiyou-Oki Earthquake which occurred on March
11, 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 17, we have compiled the roadmap towards restoration from the
accident and then we updated the roadmap considering the current
situation, on June 17. 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)
- Since the amount of water injected into the reactor of Unit 1 was
decreased at 1:49 pm on June 29, we adjusted water injection at approx.
3.5 m3/h through reactor feed water system piping arrangement.
- At 2:45 pm on June 29, we started injecting fresh water into the spent
fuel pool of Unit 3 using Fuel Pool Cooling and Filtering System.
- At around 3:00 pm on June 28, water blot was confirmed at the outlet
flange of the processing transfer pump of the accumulated water
treatment system, and a saucer was installed at 3:45 pm.
- At around 9:30 am on June 29, water leakage was confirmed at the drain
of lower part of the storage tank for water desalinations (concentrated
saltwater). We stopped the leakage by installing a closing cap at 10:30
am.
- At 8:10 am on June 29, (two) minute holes were confirmed at the hose for
the injection cooling system of the accumulated water treatment system,
and operation of the processing transfer pump was stopped at 10:59.
After replacing the hose with a new one, we started the processing
transfer pump at 1:12 pm. We started to operate circulating injection
cooling at 1:33 pm.
- At 10:45 am on June 29, we stopped the accumulated water treatment
system due to system flushing etc., and resumed the operation at 2:13
pm. Since an alarm showing water leakage was sounded in the On-site
Bunker Building at 2:49 pm, the water treatment system was stopped at
2:53 pm. We are currently confirming the details.
- At around 11:45 am on June 29, a worker of a partner company found
himself wearing a overall mask without a charcoal filter and returned
to the Main Anti-Earthquake Building immediately after leaving the
Building for inspection of the water treatment system. The result of
an examination suggests that the level of internal radioactivity was
extremely low enough not to affect his body.
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)
It is expected that we will be able to maintain the policy of avoiding
further implementation of planned blackouts this June because it is
estimated that we will be able to secure the capacity exceeding the
maximum forecasted demand as of now, thanks to your understanding as well
as cooperation on saving electricity.
However 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 planned
blackouts, we will steadily implement installation of additional power
capacity as we have planned, and we continuously do our best efforts to
secure supply capacity. We apologize for the inconvenience this may cause
and appreciate for your cooperation to save electricity.
Appendix: Past Progress (PDF 185KB)
* Revised past progress