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Press Release (Mar 17,2011)
Plant Status of Fukushima Daiichi Nuclear Power Station (as of 9:00 am Mar 17th)
All 6 units of Fukushima Daiichi Nuclear Power Station have been shut 
down.

Unit 1(Shut down)
-Reactor has been shut down. However, the explosive sound and white 
 smoke were confirmed after the big quake occurred at 3:36PM Mar 12th. 
 It was assumed to be hydrogen explosion and currently under the 
 investigation.
-We have been injecting sea water into the reactor pressure vessel. 

Unit 2(Shut down)
-Reactor has been shut down and Reactor Core Isolation Cooling System 
 has been injecting water to the reactor. However, reactor pressure has 
 increased because the system stopped, causing reactor water level to 
 drop. Following the instruction by the government and with fully 
 securing safety, measure to lower the pressure level within the reactor 
 containment vessel and injection of sea water were taken, reactor 
 pressure and water level resumed.
-We are continuing the injection of sea water into the reactor.
-At approximately 6:00am, an abnormal noise began emanating from nearby 
 Pressure Suppression Chamber and the pressure within this chamber 
 decreased.
-While we continue sea water injection operations, the temporary 
 transfer of TEPCO employees and workers from other companies not 
 directly involved in this work has begun. 

Unit 3(Shut down)
-Reactor has been shut down. However, the explosive sound and white 
 smoke were confirmed at 11:01AM Mar 14th. It was assumed to be hydrogen 
 explosion and currently under the investigation.
-As fog like steam was confirmed from reactor building at 8:30AM on 
 March 16th, we transferred the workers to safe area. After that, we 
 decided to discharge water to the upper side of reactor building by 
 helicopters, but could not do that because there was a trouble with 
 implementation of work.
-We plan to discharge water in order to cool spent fuel pool after we 
 complete the preparations by confirming the process of discharging, 
 personnel, and a situation of the site.
-We continue monitoring as it was reported that the pressure of the 
 Suppression Chamber temporally increased at around 6:15AM on March 17th.
-We have been injecting sea water into the reactor pressure vessel.

Unit 4 (shut down due to regular inspection)
-Reactor has been shut down. However, we have confirmed the sustained 
 damage around the 5th floor rooftop area of the Nuclear Reactor 
 Building.
-Afterwards, we confirmed the outbreak of fire at the northwestern part 
 of Nuclear Reactor Building. We immediately reported this matter to the 
 fire department and the related authorities.
-However, at approximately 11:00am, when TEPCO employee arrived at the 
 seen to confirm, the fire had already died down. At 5:45AM on March 
 16th, we confirmed the outbreak of the fire again but could not confirm 
 it at 6:15AM. We will continue to monitor the situation carefully.

Unit 5 (outage due to regular inspection)
-Reactor has been shut down and sufficient level of reactor coolant to 
 ensure safety is maintained.
-Currently, we do not believe there is any reactor coolant leakage 
 inside the reactor containment vessel.

Unit 6 (outage due to regular inspection)
-Reactor has been shut down and sufficient level of reactor coolant to 
 ensure safety is maintained.
-Currently, we do not believe there is any reactor coolant leakage 
 inside the reactor containment vessel.

Casualty
-2 workers of cooperative firm were injured at the occurrence of the 
 earthquake, and were transported to the hospital.
-1 TEPCO employee who was not able to stand by his own with his hand 
 holding left chest was transported to the hospital by an ambulance.
-1 subcontract worker at important earthquake-proof building was 
 unconscious and transported to the hospital by an ambulance.
-The radiation exposure of 1 TEPCO employee, who was working inside the 
 reactor building, exceeded 100mSv and was transported to the hospital.
-2 TEPCO employees felt bad during their operation in the central control 
 rooms of Unit 1 and 2 while wearing full masks, and were transferred to 
 Fukushima Daini Power Station for consultation with a medical advisor.
-4 workers were injured and transported to the hospital after explosive 
 sound and white smoke were confirmed around the Unit 1.
-11 workers were injured and transported to Fukushima Daini Nuclear 
 Power Station after explosive sound and white smoke were confirmed 
 around the Unit 3.One of the injured workers got medical treatment on 
 March 16th, but the worker reported a flank pain. We required to the 
 offsite center that the worker should be transported to the hospital. 
 After that, the helicopter of JSDF arrived and transported the worker 
 to the FUKUSHIMA Medical University Hospital at 10:56AM 
-Presence of 2 TEPCO employees at the site is not confirmed.

Others
-We are currently coordinating with the relevant authorities and 
 departments as to how to secure the cooling water to cool down the 
 water in the spent nuclear fuel pool of the plant.
-We measured radioactive materials inside of the nuclear power station 
 area (outdoor) by monitoring car and confirmed that radioactive 
 materials level is getting higher than ordinary level. As listed below, 
 we have determined that specific incidents stipulated in article 15, 
 clause 1(Abnormal increase in radiation dose measured at site boundary) 
 have occurred.
 Determined at 4:17 pm Mar 12th (Around Monitoring Post 4 )
•Determined at 8:56 am Mar 13th (Around Monitoring Post 4 )
•Determined at 2:15 pm Mar 13th (Around Monitoring Post 4 )
•Determined at 3:50 am Mar 14th (Around Monitoring Post 6 )
•Determined at 4:15 am Mar 14th (Around Monitoring Post 2 )
•Determined at 9:27 am Mar 14th (Around Monitoring Post 3 )
•Determined at 9:37 pm Mar 14th (Around main entrance )
•Determined at 6:51 am Mar 15th (Around main entrance )
•Determined at 8:11 am Mar 15th (Around main entrance )
•Determined at 4:17 pm Mar 15th (Around main entrance )
•Determined at 11:05 pm Mar 15th (Around main entrance )

-We will continue to make announcements when it was determined that a 
 specific incident stipulated in article 15, clause 1 has occurred.
-The national government has instructed evacuation for those local 
 residents within 20km radius of the periphery and evacuation to inside 
 for those residents from 20km to 30km radius of the periphery, because 
 it's possible that radioactive materials are discharged.
-Today, at approximately 10am, we observed 400mSv/h at the inland side 
 of the Unit 3 reactor building and 100mSv/h at the inland side of the 
 Unit 4 reactor building.
-We will continue to take all measures to restore the security of the 
 site and to monitor the environment of the site periphery. 
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