Due to the Tohoku-Chihou-Taiheiyou-Oki Earthquake which occurred on March
11th 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 17th, we have compiled the roadmap towards restoration from the
accident and then we updated the roadmap considering the current situation,
on May 17th. 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 2:20 pm on June 8, we found the main control room lights of unit1/2
went out. At 2:35 pm, we confirmed a part of power panel was suspended
(hereafter the "power panel"). At 2:49 pm, monitoring post (MP7/8)
transmission path were suspended. At 2:57 pm, nitrogen supply facilities
were halt due to pressure rise.
After that, at 5:32 pm, the power panel was restored. At 5:50 pm,
monitoring post (MP7/8) transmission paths were resumed. Also, at 5:54
pm, injection of nitrogen to Unit 1 was resumed. Due to suspension of
this power panel, transfer of accumulated water at Unit 2 turbine
building vertical shaft to the Centralized Radiation Waste Treatment
Facility (Process Main Building) had also been suspended, however at
6:03 pm, transfer was resumed. As a result of an investigation, we
presume that the power panel was suspended due to error signal from
supply side of an unused facility.
- At 4:12 pm on June 8th, we started the water discharge to Unit 4 spent
fuel pool using a concrete pump vehicle (from 4:16 pm to 6:05 pm,
hydrazine was also injected). The water discharge was completed at 7:41
pm.
- At 2:45 pm on June 5th, transfer of accumulated water at Unit 6 turbine
building basement, to temporary tank was resumed. After that, transfer
was suspended at 6 pm on June 8th.
- On June 8, using a concrete pumping vehicle, we have implemented spraying
dust inhibitor, which prevents the radioactive materials from dispersing,
to the roof and the wall of Unit 1 turbine building (sprayed to area of
approx. 1,000m2).
- On June 8, dust inhibitor was sprayed at observation point area (sprayed
to area of approx. 8,750 m2).
- At 9:00 am on June 4, one worker from a partner company who was under
mission to collect accumulated water at the 1st floor of the Centralized
Radiation Waste Treatment Facility, Process Main Building said he felt
sick and therefore was transferred to Iwaki-Kyoritsu Hospital by a by a
helicopter emergency medical service. The worker was diagnosed as
"transient unconscious attack and dehydration".
Fukushima Daini Nuclear Power Station:
Units 1 to 4: shutdown due to the earthquake
- At around 6:10 pm on June 8, during the work of draining water stored in
the tank, for the purpose of inspection of emergency underground tanks of
High-voltage Start-up Transformer, TEPCO employee verified the presence
of oil that had leaked to the sea surface around the water discharge
canal of Unit 3 and 4, Fukushima Daini Nuclear Power Station. Currently
we have suspended draining the stored water. Furthermore oil adsorption
mattresses are being utilized to prevent the spread of oil and an oil
fence barrier is being prepared. The cause of the leakage and its details
such as volume and status are under investigation. Discharged water is
all rain water, and discharge was done through a duct, thus there is no
discharge of radioactive materials to the sea.
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 seems that planned outage could be escaped thanks to your understanding
for brownout.
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 rolling blackouts, we
steadily implement to install additional power capacity we have planed,
and we continuously do our best efforts to secure supply capacity.
We apologize for the inconvenience this may cause and appreciate for your
cooperation for brownout.
Appendix: Past Progress (PDF 343KB)
* Revised past progress
