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 1 to 4: shutdown due to the earthquake) 
 
- At 10:12 pm on January 28, we started transferring accumulated water  
  from the basement floor 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 the process main building). At 8:21 am of January 29 we 
  have stopped this transfer. 
- At 10:06 pm on January 28, we started transferring accumulated water 
  from the basement floor 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 the process main building). At 8:18 am of January 29 we 
  have stopped this transfer. 
- At 10:00 am on January 28, we started transferring accumulated water
  from the basement floor of the turbine building of Unit 6 to the
  temporary tank. At 4:00 pm of the same day we have stopped this transfer. 
- At 8:49 am on January 29, since a gradual decline was confirmed in the 
  amount of treatment at the second Cesium adsorption apparatus (sally), 
  we temporarily stopped this facility in order to conduct reverse wash of 
  the filter. 
- At 9:37 am on January 29, due to switching in the water piping system of 
  the reactor water injection pump on the hill, we adjusted water 
  injection from the feed water system to the reactor of Unit 1 from 
  approx. 4.5 m3/h to approx. 5.5 m3/h, and the injection from the reactor 
  core spray system from approx. 2.0 m3/h to 1.0m3/h. 
- At 10:00 am on January 29, since we confirmed decrease in water 
  injection to the reactor of Unit 3 we adjusted water injection from the 
  reactor core spray system from approx. 1.5 m3/h to 2.0m3/h. (water 
  injection from the feed water system is maintained at approx. 7.1 m3/h.) 
- At 9:50 am of January 29, one of our employees, during adjustment works 
  of the water flow to the feed water spray system, found a water leak 
  from near the flow rate detector of the emergency reactor injection pump 
  on the hill (C) which is now at standby. We shut down the valve at the 
  leakage point and at 9:55 am confirmed that the water leak has stopped 
  (amount of leakage under examination). The leakage point is on the hill 
  (at the front of the main office building) and there are traces that 
  show that a certain amount of water has flowed into the drain, and we 
  are examining whether this water has flowed into the ocean or not. The 
  surface radioactivity concentration near the leakage point is as the 
  same level as the atmosphere around (radioactivity concentration near 
  the evaporative concentration apparatus is below measurable limit in all 
  three major nuclides (sampled on 20 December 2011) 
  : I-131: 1.6X10-2Bq/cm3, Cs-134:2.9X10-2Bq/cm3, Cs-137:3.3X10-2Bq/cm3, 
  and 6.0X10-1Bq/cm3 for all beta nuclides (sampled on 29 November 2011)). 
  Water injection to the reactor is maintained by the ordinary reactor 
  injection pump on the hill (A) and (C). 
- Around 9:35am on 29 January 2012, an alarm on a system failure (Unit 4 
  SFP backup cooling system) was given in Unit 4 spent fuel pool backup 
  cooling system. According to the site investigation, a pump (A) 
  to circulate cooling water of a secondary system had been stopped and 
  the water circulation was stopped accordingly (Fuel pool temperature at 
  the time of the alarm: 21°C). After the event, we discovered cooling 
  water leakage from A2 line of air-fin cooler unit (A1-A4 lines) of the A 
  system of the secondary system. We confirmed that the water leakage was 
  stopped by closing valve of the Unit A2 line. The cooling water is from  
  a filtrate tank for fire extinction and doesn't contain radioactive 
  materials. The stopped secondary pump (A) was restarted at 11:14am and 
  water cooling of the spent fuel pool was restarted accordingly (Fuel 
  pool temperature at the time of cooling restart: 21°C) 
     
· 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 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 are some minus factors such as the regular inspection 
of Unit 5 at Kashiwazaki-Kariwa Nuclear Power Station*. On the other hand, 
there are 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. 
 
* Correction of Description in [Impacts on Power Supply and Demand Balance] 
We described,"there will be some minus factors such as the regular 
inspection of Unit 5 at Kashiwazaki-Kariwa Nuclear Power Station" in the 
previous press release. However, because Unit 5 of Kashiwazaki-Kariwa 
Nuclear Power Station has already conducted a regular inspection since 
January 25, we revise the previous sentence to "there are some minus 
factors such as the regular inspection of Unit 5 at Kashiwazaki-Kariwa 
Nuclear Power Station". We would like to apologize for the correction 
(February 8, 2012). 

 
Appendix: Past Progress (As of 11:30 am, January 29, 2012) (PDF 376KB) 
Appendix: Past Progress (From March 11, 2011 to July 31, 2011) (PDF 225KB) 
 
* Revised past progress