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, 2011, we have compiled the roadmap towards restoration from the
accident and on July 19 we accomplished the Step1 target "Radiation dose is
in steady decline". Then on December 16 we confirmed the accomplishment of
the Step 2 target "Release of radioactive materials is under control and
radiation doses are being significantly held down".
In addition, on December 21, 2011, we have compiled the "Mid-to-long-Term
Roadmap toward the Decommissioning of Fukushima Daiichi Nuclear Power Units
1-4, TEPCO".
In addition to the maintenance of the plant's stable condition, we will
implement Mid-to-Long Term countermeasures towards the decommissioning of
Fukushima Daiichi Nuclear Power Units 1-4 to enable evacuees to return to
their homes as soon as possible and reduce the anxiety of the people in
Fukushima and the whole nation as soon as possible.
Below is the status of TEPCO's major facilities.
* Updates are underlined.
[Nuclear Power Station]
· Fukushima Daiichi Nuclear Power Station: Unit 1 to 3: shut down due to
the earthquake
(Units 4 to 6: outage due to regular inspections)
- At 2:30 pm on January 22, we started transferring accumulated water
from the basement of T/B, Unit 3 to the Central Radioactive Waste
Treatment Facility (Miscellaneous Solid Waste Volume Reduction
Treatment Building [High Temperature Incinerator Building]). At 10:02
am on January 24, we stopped the transfer.
- Regarding the water injection into the reactors of Units 2 and 3, in
order to switch injection piping of the reactor injection pump on the
hill, the amount of the water injected into the reactor is gradually
adjusted. At Unit 3, at 10:38 am on January 24, the amount of water
injected from the reactor feed water system was adjusted from approx.
6.0m3/h to approx. 7.0 m3/h and the amount of water injected from the
core spray system was adjusted from approx. 2.9 m3/h to approx. 2.0
m3/h. At Unit 2, at 10:42 am on the same day, the water injected from
the reactor feed water system was adjusted from approx. 7.0m3/h to
approx. 8.0 m3/h and the amount of water injected from the core spray
system was adjusted from approx. 1.9 m3/h to approx. 1.0 m3/h.
- At 12:00 pm on January 24, one of the staff from a cooperating company
struck his full-face mask against the edge of the carrier of a truck
and the filter of his mask temporarily dropped off. As there was a
possibility of intake of radioactive materials, we measured his
internal exposure dose with a whole body counter. As a result, there
was no significant problem of internal radiation dose (the measured
level was below the standard of inscription in the radiation dose
management notebook.), therefore, we evaluated that there was no intake
of radioactive materials. There was no pollution on the inner side of
the full-face mask, the face, and the nostril.
- At 8:35 am on January 24, as there was a gradual lowering of throughput
of the second cesium adsorption apparatus (Sarry), it was temporarily
stopped to backwash its filter. It was restarted at 2:55 pm on the same
day, and it reached the steady flow rate (36m3/h) at 3:03 pm on the
same day.
- At 3:24 pm on January 24, we started transferring the accumulated water
from the basement of the turbine building of Unit 3 to the centralized
radiation waste treatment facility (miscellaneous solid waste volume
reduction treatment building [high temperature incinerator building]
and process main building).
- At 3:36 pm on January 24, we started transferring the accumulated water
from the basement of the turbine building of Unit 2 to the centralized
radiation waste treatment facility (miscellaneous solid waste volume
reduction treatment building [high temperature incinerator building]
and process main building).
- At 10:00 am on January 24, we started transferring the accumulated
water in the basement of the turbine building of Unit 6 to the
temporary tank. At 4:00 pm on the same day, we stopped the transfer.
· Fukushima Daini Nuclear Power Station:
(Units 1 to 4: shutdown due to the earthquake)
· Kashiwazaki Kariwa Nuclear Power Station: Units 5, 6: under normal
operation
(Units 1 to 4 and 7: outage due to regular inspections) [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.
[Impacts on Power Supply and Demand Balance]
This winter, there will be some minus factors such as the regular
inspection of Unit 5 at Kashiwazaki-Kariwa Nuclear Power Station. On the
other hand, there will be several plus factors such as the recovery of the
common thermal power stations which suffered the earthquake. As a result,
we expect to secure 54.6 GW (at the end of January), 53.7 GW (at the end of
February) supply power.
Compared to the maximum demand in the last winter, which is 51.5 GW, we
will have 2.2 - 3.1 GW generation reserve margin.
We expect to maintain stable power supply this winter, however, as there
remains possibilities of unplanned shutdowns at our power stations and
growth in the demand according to the rapid change in the temperature, we
would like to ask your reasonable effort to save electricity.
We will continue to make our efforts to maintain stable operation and
maintenance of the power facilities in order to "prevent in principle" the
planned blackouts and secure power supply.
Appendix: Past Progress (As of 4:00 pm, January 24, 2012) (PDF 356KB)
Appendix: Past Progress (From March 11, 2011 to July 31, 2011) (PDF 225KB)
* Revised past progress
