*No updates in this release 

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 12th. It was assumed to be hydrogen
 explosion.
-At approximately 2:30 am on March 23rd, seawater injection to the nuclear
 reactor through the feed water system was initiated.
-From 3:37 pm on March 25th, we started injecting freshwater and are now
 injecting fresh water by a motor driven pump powered by the off-site
 transmission line. From on April 27th, we have increased the amount of
 injecting freshwater from approximately 6 m3/h to approximately 14 m3/h.
 At 10:14 am on April 29, we put the amount of injecting freshwater back
 to approximately 6 m3/h.
-As it is suspected that hydrogen gas is accumulated inside reactor
 containment vessel, we commenced the valve opening operation concerning
 injection of nitrogen gas into the reactor container vessel at 10:30 pm
 April 6th and commenced injection at 1:31am April 7th.

Unit 2(Shut down) 
-At approximately 6:00 am on March 15th, an abnormal noise began emanating
 from nearby Pressure Suppression Chamber and the pressure within the
 chamber decreased. 
-From 10:10 am on March 26th, we started injecting freshwater to the
 reactor and are now injecting fresh water by a motor driven pump powered
 by the off-site transmission line. 

Unit 3(Shut down) 
-Explosive sound and white smoke were confirmed at approximately 11:01am
 on March 14th. It was assumed to be hydrogen explosion.
-From 6:02 pm on March 25th, 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. 

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

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

Unit 6(outage due to regular inspection) 
-Sufficient level of reactor coolant to ensure safety is maintained.
-At 10:14 pm on March 19th, 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 20th, the reactor achieved reactor cold shutdown. 
-At this moment, we do not consider any reactor coolant leakage inside the
 reactor happened. 

Operation for cooling the spent fuel pools 
-We will continuously conduct further water spray depending on the
 conditions of spent fuel pools, if needed. 

Others 
-From 1:30 pm on April 26th, we started spraying dust inhibitor in order
 to prevent diffusion of radioactive materials.
-At 10:08 am on April 19th we started transferring high level radioactive
 wastewater to the Centralized Radiation Waste Treatment Facility. At 9:16
 am on April 29th, we temporarily suspended transferring due to the
 inspection of transferring facilities. We plan to restart transferring
 tomorrow afternoon.
-From 11:36 am to 2:05 pm on April 29, we have checked the status inside
 the reactor building of Unit 1 using remotely-controlled robot and
 confirmed that there was no significant water leakage from the primary
 containment vessel.
-We will continue to take all measures to ensure the safety and to
 continue monitoring the surrounding environment around the power station.