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 progress status of roadmap considering the current
situation, on July 19. Accomplishment of the Step1 target "Radiation dose
is in steady decline" has been confirmed.
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 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 10:56 am on July 16, we started transfer of accumulated water from
the vertical shaft, T/B, Unit 2 to Centralized Radiation Waste Treatment
Facility (Process Main Building). At 4:04 pm on July 21, we stopped the
transfer.
- At 10:50 am on July 16, we started transfer of accumulated water from
the vertical shaft, T/B, Unit 3 to Centralized Radiation Waste Treatment
Facility (Process Main Building). At 3:59 pm on July 21, we stopped the
transfer.
- At 8:38 am on July 21, we stopped operation of the water treatment
facility, because the water level gauge, which is set at suppression
pool water surge-tank (B), was powered off due to the change of power
sources associated with double circuit installation for offsite power
at Unit 5 and 6. At 12:28 am on July 22, we started the operation of
the water treatment facility, resuming water processing at 12:40 am on
the same day.
- At 7:10 am on July 22, the circuit breaker for the bus which supplies
electricity to a part of power network in the power station opened the
circuit due to overload, resulting in the power off of the following
facilities: the alternative cooling facility for spent fuel pool at Unit
3, monitoring gauges in the reactor of Unit 3 & 4, water treatment
facilities, Main Anti-Earthquake Building, and the cooling facility of
common pool. For Main Anti-Earthquake Building, we restore its power
supply immediately using backup power generator. For reference, this
event did not affect the following operations: water injection and
nitrogen gas injection to reactor of each unit, and data of each
monitoring post. Currently investigation of the cause of the event as
well as power restoration work are underway.
- From 5:06 am to 6:02 am on July 22, dust sampling survey was implemented
for the upper part of Unit 2's reactor building, using unmanned helicopter.
- Around 10:06am on July 18, a worker of the partner company fell from the
height of about 3m during the connection work of the optical cable on
the distribution pole near the power station's gazebo and he was injured.
At 10:50 am, he was transported to J village by service car. We requested
the helicopter emergency medical service (called "Doctor Heli") at 11:06
am. He was transported from multi purpose sports ground in Hirono town to
the Iwaki Kyouritsu Hospital by the Doctor Heli at 12:22 pm. According to
the result of physical examination, he was diagnosed as "fracture of
distal end of right radius, of left radius head, and left ligamentum
collaterale ulnare."
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]
- Power supply has returned to normal and facilities damaged by the
earthquake are now being handled in a timely manner.
[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 to 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 57.3GW at the end of
July, and 56.1GW at the end of August.
Also, in order to support the supply and demand balance 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 55.9GW at the end of July, and 54.7GW 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 216KB)
* Revised past progress