TEPCO : Press Release | Impact to TEPCO's Facilities due to Miyagiken-Oki Earthquake (as of 8AM)

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 ncreasing according to the monitoring car at the site (outside of the site). One of the monitoring posts is also indicating higher than normal level.

* 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.

* 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.

* We started injection of sea water into the reactor core of Unit 1 at 8:20PM, Mar 12 and then boric acid subsequently.

* High Pressure Coolant Injection System of Unit 3 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,

* 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 ontainment 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 Units 2, 3: shutdown due to earthquake

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: (4 or 5?)

- Naka Substation

- Shin Motegi Substation

- Joban Substation

- Ibaraki Substation

- Nishi Mito Substation

[Blackout in TEPCO's Service Area]

Total of about 0.31 million households are out of power.

Tokyo: 0

Kanagawa Pref.: 0

Tochigi Pref.: 7,221

Chiba Pref.: 301

Saitama Pref: 0

Gunma Pref.: 0

Ibaraki Pref: 298,977

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

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.

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TEPCO : Press Release | Impact to TEPCO's Facilities due to Miyagiken-Oki Earthquake (as of 8AM)