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TEPCO News Corporate Information Press Releases *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. 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