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Corporate Information

 
Press Release (Jan 30,2012)
Status of TEPCO's Facilities and its services after the Tohoku-Chihou-Taiheiyou-Oki Earthquake (as of 3:00 pm, January 30)
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 4:27 pm on January 29, we stopped the operation of the secondary  
    air-fin coolers (the temperature of fuel pool at the time of stoppage:  
    21°C) of spent fuel pool in order to prevent overcooling of alternative  
    cooling system of spent fuel pool of Unit 4. 
  - Because we completed the replacement of water injection line of water 
    injection pump located on upland with polyethylene pipes following the  
    reliability improvement of water injection to the reactors, we have  
    changed the amount of water injection to the reactors in a step-by-step  
    manner. At 10:10 am on January 30, for the amount of water injection to 
    the Unit 2's reactor, we changed the amount of water injection from  
    water feeding system from approximately 7.0m3/h to approximately 6.0  
    m3/h and that from  Core Spray System from approximately 1.8 m3/h to  
    approximately 3.0 m3/h. At 10:14 am on the same day, for the amount of  
    water injection to Unit 3's reactor, we change d the amount of water  
    injection from water feeding system from approximately 7.1m3/h to 
    approximately 6.0 m3/h and that from  Core Spray System from  
    approximately 1.9 m3/h to approximately 3.0 m3/h.  
  - We plan to conduct replacing the water injection line of the reactor  
    water injection pump on the hill from pressure proof hose to  
    polyethylene pipe in order to improve the reliability of water  
    injection to the reactor. Since we have to temporally suspend the water  
    injection to achieve this work, on January 30, regarding the water  
    injection to the reactor of Unit 1through the water feeding system, we  
    switched from the reactor water injection pump on the hill to the  
    reactor water injection pump in the Turbine Building and we increased  
    the water injection volume from the feed water system from approx. 5.6  
    m3/h to approx. 6.5 m3/h, and decreased the volume from the reactor  
    core spray system from 0.9 m3/h to approx. 0m3/h at 10:38 am on January  
    30. 
  - At 1:15 pm on January 30, we started injection of hydrazine to spent  
    fuel pool of Unit 2 through the circulating cooling system. At 2:56 pm  
    on the same day, we stopped injection of hydrazine. 
 
· Fukushima Daini Nuclear Power Station:
  (Units 1 to 4: shutdown due to the earthquake) 
 
  - At around 11:13 am on January 30, according to the report from the  
    field worker that smoke emitted from the switch box when he opened the  
    door located at the basement of the control building of Unit 1 and 2,  
    at around 11:19 am, a TEPCO worker checked the scene and fire was not  
    found at the time. We reported the incident to the fire station at  
    11:48 am. Afterwards, as the result of inspection of the scene by fire  
    station, at 0:23 pm, it is considered that fire was not occurred. There  
    is no radioactive influence to the outside by this occurrence. 
 
· 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 3:00 pm, January 30, 2012) (PDF 385KB) 
Appendix: Past Progress (From March 11, 2011 to July 31, 2011) (PDF 225KB) 
 
* Revised past progress 
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