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 thermometer placed at the lower part of RPV (top of 
  the lower head 135° whose trend which showed a different trend while 
  others showed the increasing trend after we decreased the water 
  injection rate to the Unit 2 Reactor from the feed water system on 
  February 22, we reported to Nuclear and Industrial Safety Agency of 
  Ministry of Economy, Trade and Industry. We will continue monitoring 
  this thermometer. 
  ·At 5:00 am on March 3, the temperature of the lower part of the RPV 
   (top of the lower head 135°) : approx. 44.9 °C 
  ·At5:00 am on March 3, the temperature of the lower part of the RPV  
   (top of the lower head 270°) : approx. 41.7 °C (reference) 
 
* On March 1, 2012, we took samples on the gas in Unit 3 PCV gas control 
  system under the test operation. We confirmed based on the result of the 
  analyses that the concentration of Xenon 135 at the inlet of the system 
  was below the detection limit, meaning that it is below 1 Bq/cm3, which 
  is the threshold of re-critical condition. 
 
* At 6:20 pm on March 2, 2012, since the flow rate of the water injected 
  to the Unit 2 reactor was dropped, we adjusted the water injection 
  amount from the reactor feed water system from approx. 2.6 m3/h to 
  approx. 3.0 m3/h and that from the core spray system from approx. 5.7 
  m3/h to approx. 6.0 m3/h. 
 
* Since the temperature measured by a RPV thermometer (at the upper part 
  of RPV supporting skirt junction 270°) was increasing, we surveyed the 
  thermometer during 11:08 am to 11:23 am on March 2, 2012, and found the 
  DC resistance increasing. In order to check the reliability of it, we 
  examined the trend of the temperature. As a result, at 11:00 pm on the 
  same day, we decided to exclude it from the monitoring meters stipulated 
  by the Safety Regulations, and to keep monitoring the valued it shows as 
  a reference. The reactor is kept being cooled, and the concentration of 
  Xenon 135 measured by the noble gas monitor of Unit 2 PCV gas control 
  system was below the detection limit, meaning that the concentration is 
  below 1 Bq/cm3, which is the threshold of re-critical condition. 
  Therefore, we consider it hasn't gone re-critical. We will keep 
  monitoring the temperature at the bottom of PCV using other devices. 
 
* At 9:43 am on March 3, 2012, we started transferring the water 
  accumulated in the site banker building to the process main building in 
  the centralized waste treatment facilities. 
 
·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 10:00 am on March 3, 2012) (PDF 464KB) 
Appendix: Past Progress (From March 11, 2011 to July 31, 2011) (PDF 225KB) 
 
* Revised past progress