Corporate Information

Press Release (May 31,2011)
Status of TEPCO's Facilities and its services after the Tohoku-Chihou-Taiheiyou-Oki Earthquake(as of 4:00 PM, May 31)
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 approximately 8:00 am on May 31, we confirmed oil leakage to the sea 
  around the curtain wall of the water intake canal of Unit 5 & 6 and 
  reported the issue to Futaba Wide-area Fire Headquarters and Fukushima 
  Coastguard Office. As a result of our investigation, we confirmed that 
  oil leaked from pipes around seawall to the port through holes of steel 
  sheet piles and that the leakage already stopped. Since the diffused 
  area was just around the curtain wall and the surface of the sea around 
  Shallow Draft Quay and the oil film was very thin, we confirmed that 
  there is no spread to the outer sea. We completed installing 
  oil-absorbing mat around seawall at approximately 2:00 pm and also 
  installed oil fences at 2:50 pm. We plan to protect pipes around seawall 
  and collect the oil. 
- At 11:40 am on May 31, we conducted leakage test on the primary system 
  of the alternative cooling system of the spent fuel pool. 
- At 10:19 am on May 31, we changed rate of water injection through the 
  reactor feed water system piping arrangement from approximately 13.5 m3/h 
  to approximately 12.5 m3/h. 
- At approximately 2:30 pm on May 31, big sound was confirmed at the 
  southern side of the reactor building of Unit 4, where wireless unmanned 
  heavy machineries were removing rubbles. It seemed that the unmanned 
  heavy machinery tucked and broke some cylinder. Nobody got injured. 
  There was no change in the data of the monitoring post. 
- On May 31, dust inhibitor was sprayed to areas including around the main 
- At approximately 1:30 pm on May 31, one of the partner companies' 
  workers who were installing cables at Centralized Radiation Waste 
  Treatment Facility got his right hand forefinger injured. After the 
  intravenous drip at the medical room of the station, he was transferred 
  to J Village at 2:26 pm. Then at 3:35 pm he was transferred from 
  J Village to Fukushima accident Hospital. There was no contamination to 
  his body. 
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 2 and 4: Shutdown due to the 
[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)

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. 
Appendix: Past Progress (PDF 325KB) 

* Revised past progress 
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