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. 
 
Below is the status of TEPCO's major facilities. 
*New items 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 5:00 pm, on April 15th, we had completed transferring emergency power 
 sources to spray water to reactors of Unit 1 to 3 to the upland. 
 
*From 2:30 pm on April 15th, water spray to the spent fuel pool of Unit 4 
 was started with the concrete pumping vehicle and the water spray was 
 finished at 6:29 pm, on April 15th. 
 
*On March 20th and 21st and from March 23rd to April 14th, we have 
 detected radioactive materials in the air which were collected at the 
 site. The data of detected three nuclides (Iodine-131, Cesium-134 and 
 Cesium-137) are released as fixed figures. Other nuclide figures are to 
 be re-evaluated based on improved measures for recurrence prevention 
 which have been prepared in accordance with a strong warning by NISA 
 on April 1st. 
 
*On March 21st and from March 23rd to April 14th, we have detected 
 radioactive materials in the seawater around the water discharge 
 canal of the plant. The data of detected three nuclides (Iodine-131, 
 Cesium-134 and Cesium-137) are released as fixed figures. Other nuclide 
 figures are to be re-evaluated based on improved measures for recurrence 
 prevention which have been prepared in accordance with a strong warning 
 by NISA on April 1st. 
 
*From 3:00 pm April 5th, a construction of installing large sandbags 
 around the pier to prevent the outflow of the contaminated water from 
 station's port on the south side to the ocean was started. From April 
 15, we started to throw in sandbags including zeolite in front of the 
 screen room of Unit 1 to 4. In order to prevent water containing 
 radioactive materials from spilling from a plant's port to the sea, we 
 installed approximately 120 meter wide double silt fences around a 
 breakwater on the south of the station at 10:45 am on April 11th. On 
 April 12th, 13th and 15th, we installed a total of 7 iron plates in front 
 of the screen of Unit 2. At 1:50 pm, April 13th, double silt fences were 
 installed in front of the screen of Unit 3 and 4. At 12:20 pm, silt 
 fences were installed in front of the screen of Unit 1 and 2 and the 
 water intake canal. 
 
*From 7:03 pm, April 4th, we started discharging the low level radioactive 
 wastewater stored in the Centralized Radiation Waste Treatment Facility 
 to the ocean from the south of the water discharge canal. The discharge 
 was finished at 5:40 pm, April 10. Total amount of discharged water is 
 approximately 9,070 tons.  Also, from 9:00 pm, April 4th, we started 
 discharging the low level radioactive subsurface wastewater stored in the 
 sub drain pits of Unit 5 and 6 by using one pump to the ocean from the 
 water discharge canal of Units 5 and 6. At 6:52 pm, April 9th we finished 
 discharging water. The amount of discharged water was approximately 1,323 
 tons. 
 The total amount of emitted radioactivity is approximately 1.5*1011 
 Becquerel. We evaluate approximately 0.6 mSv of effective radioactive 
 doses per year per an adult as the impact on the discharge of the low 
 radioactive stored water to the ocean if an adult eats adjacent fish and 
 seaweeds every day. The amount (0.6 mSv of effective radioactive doses 
 per year) is one-forth of annual radioactive dose (2.4 mSv) to which the 
 general public is exposed from nature and equivalent to that when we 
 evaluated before discharging the water to the ocean. 
 
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 Units 2 and 4: Shutdown due to the 
  earthquake 
 -Hitachinaka Thermal Power Station Unit 1: Shutdown due to the 
  earthquake 
 -Kashima Thermal Power Station Unit 6: Shutdown due to the earthquake 
 
[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. 
 
[Avoidance of further Implementation on Planned Rolling Blackouts and 
 Request for Conserving Electricity Consumption] 
 Currently, we are working to restore electricity supply after our nuclear 
 and thermal power facilities were severely damaged by 
 Tohoku-Chihou-Taiheiyou-Oki Earthquake. The widespread understanding and 
 cooperation of our customers to conserve electricity have contributed to 
 the improvement of this tight power supply-demand balance situation. 
 Amidst this backdrop, since the electricity supply will be able to 
 balance with the demand for the time being, we have decided not to 
 implement further rolling blackouts in principle. 
 However, we must sincerely ask for your continued cooperation in 
 reducing electricity consumption due to the possible increase in demand 
 caused by warmer weather or unexpected trouble at power sta tions that 
 are currently being restored to service.  In case the electricity 
 supply-demand balance becomes tighter than expected, as stated, we may 
 reluctantly restart the implementation of rollin g blackouts. We kindly 
 ask for your cooperation. 
 We will do our best to maintain this policy of avoiding further 
 implementation of rolling blackouts during the summer. 
 

 
Appendix: Past Progress (PDF 140KB) 
 
* Revised past progress