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 10:30 am on July 7, we resumed transfer of the accumulated water at
the basement of T/B, Unit 6 to the temporary tanks.
-At 10:09 am on July 7, we resumed transfer of the low level radioactive
accumulated water that we once transferred from T/B of Unit 6 to
temporary tanks to Mega Float.
-From 8:00 am on July 6 to 11:09 am on July 7, we temporarily suspended
operation of the desalination facility as the water level of the storage
tank at the upstream of the desalination facility went down to the lower
limit.
-At 11:00 am on July 7, we stopped operation of the water treatment
facility to flush the system. At 12:50 pm on July 7, we started the
accumulated water treatment facility (cesium absorption facility). At
1:02 pm, we resumed operation of the water treatment facility. We are
continuing water injection to Reactor.
Fukushima Daini Nuclear Power Station:
Units 1 to 4: shutdown due to the earthquake
-At 2:05 pm on July 7, we received a report as follows: "Workers from our
subcontractor were checking the power board for the High Pressure Core
Spray System located at B1, auxiliary building to R/B, Unit 1. They found
sparks from a circuit breaker in that power board." At 2:30 pm on the
same day, TEPCO employees checked the power board. From now on, we will
open the connecting circuit breaker that supplies power to the power
board and investigate the cause. In connection with this, we are planning
to temporarily stop the Residual Heat Removal System Pump (B).
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]
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 196KB)
* Revised past progress