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. 
 
*The 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 before the earthquake) 
 
- With regard to the water injection volume for Unit 2 reactor, which was 
  increased with temperature figure raising, we have gradually adjusted it 
  to the original volume before temperature increasing (Feed water system: 
  approx. 3.0m3/h, core spray system: approx. 6.0m3/h). During our 
  observing the plant parameter after the decreasing the flow rate of feed 
  water system on February 22, we found that one thermometer in the lower 
  part of the RPV indicated the different movement from others. From 0:21 
  pm to 2:48 pm on February 23, we investigated the concerned device. As 
  the result of the measurement of DC resistance, we found no breaking 
  wire and availability of the thermometer. But we confirmed that the DC 
  resistance of it became higher than the previous measurement test data. 
  We will evaluate the soundness of the concerned device and examine 
  correspondence in future. We make sure no re-criticality state because 
  there were no significant changes at the monitoring post and as the 
  result of the sampling for the Gas Control System of the Unit 2, we 
  confirmed that the concentration of Xe-135 was below the detectible 
  limit. 
  · At 11:00 am on March 1, the temperature of the lower part of the RPV 
    (top of the lower head 135°) : approx. 44.8 °C 
  · At 11:00 am on March 1, the temperature of the lower part of the RPV 
    (top of the lower head 270°) : approx. 41.1 °C (reference) 
 
- On February 29, 2011, we sampled the gas in the PCV gas control system. 
  Results of the analyses showed that the concentration of Xe-135 at the 
  entrance of the system was below the detection limit (1.0 x 10-1Bq/cm3). 
  It shows that the concentration is below the threshold of re-critical 
  condition (1 Bq/cm3). 
 
- At 3:18 pm on January 14, we started operation of the radioactive 
  material removal instrument for the spent fuel pool in Unit 3. At 1:35 
  pm on March 1, 2012, we stopped since we finished the cleaning. 
 
- On March 1, we took samples of the dust at the above of Unit 1 Reactor 
  Building using the exhaust gas filtering facilities of the Unit 1 
  Reactor cover. 
 
- On March 1, 2012, we took samples at the charcoal filter of Unit 3 RCV 
  gas control system. 
 
- At 9:00 am on March 1, 2012, we started sampling of the dust at the 
  above of Unit 3 Reactor Building and at the opening of the hatch for 
  equipments at Unit 3 Reactor Building. At 12:40 pm on the same day, we 
  finished the sampling. 
 
· Fukushima Daini Nuclear Power Station: 
  Units 1 to 4: shutdown due to the earthquake 
 
· Kashiwazaki Kariwa Nuclear Power Station: 
  Units 6: under normal operation 
  (Units 1 to 5 and 7: outage due to regular inspections) 
 
[Thermal Power Station] 
· Power supply has returned to normal and the facilities damaged by the 
  earthquake are now being handled in a timely manner. 
 
[Hydro Power Station] 
· Power supply has returned to normal and the facilities damaged by the 
  earthquake are now being handled in a timely manner. 
 
[Impacts on Transmission Facilities] 
· Power supply has returned to normal and the facilities damaged by the 
  earthquake are now being handled in a timely manner. 
 
[Impacts on Power Supply and Demand Balance] 
We expect to maintain stable power supply in March. 
Daily supply and demand balance is announced at our "TEPCO Electricity 
Forecast". 
 

 
Appendix: Past Progress (As of 3:00 pm on March 1, 2012) (PDF 461KB) 
Appendix: Past Progress (From March 11, 2011 to July 31, 2011) (PDF 225KB) 
 
* Revised past progress