*Updates from previous press release are underlined.

All 6 units of Fukushima Daiichi Nuclear Power Station have been shut down.

Unit 1 (Shut down) 
-Explosive sound and white smoke were confirmed after the big quake 
 occurred at 3:36 pm on March 12. It was assumed to be hydrogen 
 explosion.
-At approximately 2:30 am on March 23, seawater injection to the reactor 
 through the reactor feed water system was initiated.
-From 3:37 pm on March 25, we started injecting freshwater by a motor 
 driven pump which is now powered by the off-site transmission line. Water 
 is currently injected at approx. 3.4㎥/h through reactor feed water 
 system piping arrangement.
-We commenced injection of nitrogen gas into Primary Containment Vessel 
 at 1:31am April 7.

Unit 2 (Shut down) 
-At approximately 6:00 am on March 15, an abnormal noise began emanating 
 from nearby Pressure Suppression Chamber and the pressure within the 
 chamber decreased. 
-From 10:10 am on March 26, we started injecting freshwater to the 
 reactor. At 6:27 pm on June 23, we changed the water injection line so 
 that we can inject water to Unit 1 and 2 by the motor driven pump for 
 Unit 1 and stopped the motor driven pump for Unit 2. 
 Water is currently injected at approx. 3.4㎥/h through reactor feed 
 water system piping arrangement. 
-At 8:06 pm on June 28, we started injecting nitrogen gas into the 
 Primary Containment Vessel.

Unit 3 (Shut down) 
-Explosive sound and white smoke were confirmed at approximately 11:01am 
 on March 14. It was assumed to be hydrogen explosion.
-From 6:02 pm on March 25, we started injecting fresh water to the reactor 
 and are now injecting fresh water by a motor driven pump powered by the 
 off-site transmission line.
 Water is currently injected at approx. 9 ㎥/h through reactor feed water 
 system piping arrangement.

Unit 4 (Outage due to regular inspection) 
-At approximately 6:00 am on March 15, we confirmed the explosive sound 
 and the sustained damage around the 5th floor rooftop area of Reactor 
 Building.
-At this moment, we do not consider any reactor coolant leakage inside 
 the primary containment vessel has occurred.

Unit 5 (Outage due to regular inspection) 
-Sufficient level of reactor coolant to ensure safety is maintained.
-At 5:00 am on March 19, we started the Residual Heat Removal System Pump 
 (C) in order to cool the spent fuel pool.
-At 2:30 pm on March 20, the reactor achieved cold shutdown.
-At this moment, we do not consider any reactor coolant leakage inside 
 the primary containment vessel has occurred.

Unit 6 (Outage due to regular inspection) 
-Sufficient level of reactor coolant to ensure safety is maintained.
-At 10:14 pm on March 19, we started the Residual Heat Removal System Pump 
 (B) of Unit 6 in order to cool the spent fuel pool.
-At 7:27 pm on March 20, the reactor achieved cold shutdown. 
-At this moment, we do not consider any reactor coolant leakage inside 
 the primary containment vessel has occurred.

Operation for cooling the spent fuel pools 
-At 5:21 pm on May 31, we started cyclic cooling of the spent fuel pool 
 in Unit 2 using alternative cooling system for fuel pool cooling and 
 filtering system. 
-At 7:47 pm on June 30, we started cyclic cooling of the spent fuel pool 
 in Unit 3 using alternative cooling system for fuel pool cooling and 
 filtering system.
-We will continuously conduct further water spray depending on the 
 conditions of spent fuel pools, if needed.

Others 
-At 1:30 pm on April 26, we started spraying the dust inhibitor inside 
 the site. 
-At 11:00 am on May 10, we started transferring accumulated water from 
 the underground level of reactor building to the radiation waste 
 treatment facility of Unit 6.
-At approximately 10:00 am on June 13, we started the operation of the 
 circulating seawater purification facility installed at the screen area 
 of Unit 2 and 3.
-From 8:00 pm on June17, we started operation of water treatment of 
 accumulated water at accumulated water treatment facility. 
-At 6:00 pm on July 2, we started the circulating injection cooling to 
 inject the water, which was treated by the accumulated water treatment 
 system, to the reactors through the buffer tank.
-At 4:53 am on July 10, since chemical liquid was leaked from the chemical 
 injection line of the coagulation settling equipment of the water 
 treatment facility, we stopped the operation of the facility. Afterwards, 
 we repaired the leakage point and at 5:06 pm, we restarted the facility. 
 At 5:40 pm, water treatment was restarted. Water injection into the 
 reactor was continued during the repair work. 
-At 3:15 pm on July 10, we started transferring the accumulated water from 
 the turbine building of Unit 3 to Centralized Radiation Waste Treatment 
 Facility Process Main Building. 
-At 10:00 am on July 11, we started transferring low radioactive 
 accumulated water from the outdoor temporary tank to Mega Float. 
-We will continue to take all measures to ensure the safety and to 
 continue monitoring the surrounding environment around the power station.