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)
-At 10:09 am on July 13th, we started to transfer contaminated water from
the trench of unit 2 to Centralized Radiation Waste Treatment Facility
(Process Main Building).
-At 11:50 am on July 13th, we started to inject fresh water into the
reactor well of Unit 4 and equipment storage pool. We found some leakage
from the connection part of the hose in the water injection line and
therefore stopped the injection at 0:45 pm on the day.
-As a countermeasure against seawater leakage from the piping of the
outside temporary residual heat removal seawater system of the residual
heat removal system of the Unit 5 occurred on July 3, we bound the piping
tightly. However we found the similar part after reconfirmation of the
site, in terms of preventive maintenance, we stopped the residual heat
removal system at 6:30 am on July 13, stopped outside temporary seawater
cooling pump at 6:44 am, and then replaced the piping. We restarted the
residual heat removal system at 10:58 am. (outside temporary seawater
cooling pump restarted at 10:52 am)
-At 10:00 am on July 13, we started transferring low radioactive
accumulate water in the outside temporary tanks to the Mega Float.
-At 1:00 pm on 13th July, transportable monitoring post recorded zero. We
checked monitoring equipment and resumed at 2:55 pm on the day.
-At 11:00 am on July 13th, water treatment facility was stopped for system
flashing. At 1:07 pm, we confirmed the leakage at the chemical injection
line of the coagulation settling equipment of the water treatment
facility and flashing was paused. Water injection into the reactor is
continued.
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 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]
In regard with the supply side in this summer, taking in account of the
acceleration of restoration schedule for Hirono Thermal Power Station,
more purchase of privately generated power, and excluding the power supply
from 60Hz areas which had been planned (due to the current difficult
situation), supply capacity outlook is amended to 56.8GW at the end of
July, and 55.6GW at the end of August.
Also, in order to support balance of demand and supply in the Tohoku area,
which suffered severe damage from the quake, we would like to supply
maximum of 1.4GW to Tohoku Electric Power Company by thoroughly
implementing both supply and demand countermeasures. The supply capacity
in this regard will be 55.4GW at the end of July, and 54.2GW at the end of
August.
Estimated peak demand of 55GW for this summer is 5GW lower than that of
last year. This incorporates the saving of electricity from "Outline of
Countermeasures for Power Supply and Demand During Summertime" and
restoration from decrease of production due to the quake.
As the occurrence of unplanned outage of aged thermal power stations or
sudden increase of demand due to unexpected high temperature during summer
may cause difficulties in maintaining stable demand supply balance, in
order to continue to avoid rolling blackouts, we will steadily maintain
supply capacity, and continue our efforts on reliable operation and
maintenance of power facilities.
We apologize for the inconvenience this may cause and appreciate for your
cooperation to save electricity.
Appendix: Past Progress (PDF 243KB)
* Revised past progress