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Press Release (Mar 13,2011)
Impact to TEPCO's Facilities due to Miyagiken-Oki Earthquake (as of 3:00PM)
 
Below is major impact to TEPCO's facilities due to the Miyagiken-Oki 
Earthquake that occurred yesterday at 2:46PM.
 *new items are underlined 
 
[Nuclear Power Station]
Fukushima Daiichi Nuclear Power Station:
  Units 1 to 3: shutdown due to earthquake
  Units 4 to 6: outage due to regular inspection
* The national government has instructed evacuation for those local 
residents within 20km radius of the site periphery.
* The value of radioactive material (iodine, etc) is increasing according 
to the monitoring car at the site (outside).
* Since the amount of radiation at the boundary of the site exceeds the 
limits, we decide at 4:17PM, Mar 12 and we have reported and/or noticed 
the government agencies concerned to apply the clause 1 of the Article 15 
of the Radiation Disaster Measure at 5PM, Mar 12. The radiation dose at 
the monitoring post decreased once. Today, the measured value revamped and 
the radiation dose measured at site boundary exceeded the limiting value 
again. As such, at 8:56AM, today, it was determined that a specific incident 
stipulated in article 15, clause 1 occurred and at 09:01AM, today, notified 
accordingly.
After that, the measured value by the monitoring car decreased once, however 
the value revamped and the radiation dose measured at site boundary exceeded 
the limitation again. As such, at 2:15PM, today, it was determined that a 
specific incident stipulated in article 15, clause 1 occurred and at 02:23PM, 
today, notified accordingly.
* In addition, a vertical earthquake hit the site and big explosion has 
happened near the Unit 1 and smoke breaks out around 3:36PM, Mar 12th.
* Unit 1: We started injection of sea water into the reactor core at 8:20PM, 
Mar 12 and then boric acid subsequently. We are coordinating with the 
relevant authorities and departments as to how to cool down water in the 
spent nuclear fuel pool.
* Unit 2: Reactor has been shut down and Reactor Core Isolation Cooling 
System has been injecting water to the reactor. Current reactor water level 
is lower than normal level, but the water level is steady. After fully 
securing safety, we are preparing to implement a measure to reduce the 
pressure of the reactor containment vessels under the instruction of the 
national government. To do so, we operated the vent valve and completed the 
operation at 11:00AM, Mar 13.
* Unit 3: High Pressure Coolant Injection System automatically stopped. We 
endeavored to restart the Reactor Core Isolation Cooling System but failed. 
Also, we could not confirm the water inflow of Emergency Core Cooling System. 
As such, we decided at 5.10AM, Mar 12, and we reported and/or noticed the 
government agencies concerned to apply the clause 1 of the Article 15 of 
the Radiation Disaster Measure at 5:58AM, Mar 13.
In order to fully secure safety, we operated the vent valve to reduce the 
pressure of the reactor containment vessels (partial release of air 
containing radioactive materials) and completed the procedure at 8:41AM, 
Mar 13 (successfully completed at 09:20AM, Mar 13. After that, we began 
injecting water containing boric acid that absorbs neutron into the reactor 
by the fire pump from 09:25AM, Mar 13.
Taking account of the situation that the water level within the pressure 
vessel did not rise for a long time and the radiation dose is increasing, 
we cannot exclude the possibility that the same situation occurred at Unit 
1 on Mar 12 will occur. We are considering the countermeasure to prevent 
that.
* We continue endeavoring to secure the safety that all we can do and 
monitoring the periphery.
 
Fukushima Daini Nuclear Power Station:
  Units 1 to 4: shutdown due to earthquake
* The national government has instructed evacuation for those local 
residents within 10km radius of the periphery.
* At present, we have decided to prepare implementing measures to reduce 
the pressure of the reactor containment vessel (partial discharge of air 
containing radioactive materials) in order to fully secure safety.
These measures are considered to be implemented in Units 1, 2 and 3 and 
accordingly, we have reported and/or noticed the government agencies 
concerned. 
* Unit 3 has been stopped and being "nuclear reactor cooling hot stop" at 
12:15PM.
* The operator trapped in the crane operating console of the exhaust stack 
was transferred to the ground at 5:13PM and confirmed the death at 5:17PM.
 
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 earthquake
Hitachinaka Thermal Power Station Unit 1: shutdown due to earthquake
Kashima Thermal Power Station Units 2, 3, 5, 6: shutdown due to earthquake
Ohi Thermal Power Station Unit 2: shutdown due to earthquake (Unit 3 
resumed operation)
Higashi-Ohgishima Thermal Power Station Unit 1: shutdown due to earthquake
 
[Hydro Power Station]
* All the stations have been restored.
 
[Transmission System, etc.]
 4 substations shown below have been shutdown:
- Naka Substation
- Shin Motegi Substation
- Joban Substation
- Nishi Mito Substation
 
[Blackout in TEPCO's Service Area]
 Total of about 0.26 million households are out of power. 
 Tokyo: 0 
 Kanagawa Pref.: 0 
 Tochigi Pref.: 7,366 
 Chiba Pref.: 301 
 Saitama Pref: 0 
 Gunma Pref.: 0 
 Ibaraki Pref: 247,853 
 Yamanashi Pref: 0 
 Shizuoka Pref: 0 (east of Fuji River) 
 
[Supply and Demand Status within TEPCO's Service Area to Secure Stable Power 
Supply] 
Backup supply from Shinshinano Conversion Station: 600MW
Backup supply from Sakuma Conversion Station: 300MW
Backup supply from Higashi Shimizu Conversion Station: 100MW
Backup supply from Kitahon Interconnection Facility: 600MW
 
Because TEPCO's facilities have been seriously damaged, power shortage 
may occur. TEPCO appreciates customers' cooperation in reducing electricity 
usage by avoiding using unnecessary lighting and electrical equipment.
 
We are taking all measures to restore power, however, we expect extremely 
difficult situation in power supply for tomorrow as well.
We kindly ask our customers to cooperate with us in reducing usage of power.
 
Please do NOT touch cut-off electric wires.
 
* Revised past progress 
 
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