At around 10:28 am on January 10, 2012, at the concentrated water tank of 
water desalinations (Reverse Osmosis Membrane) at Fukushima Daiichi 
Nuclear Power Station, our employee found water dripping from the packing 
at the base of the concentrated water storage tank at the rate of 
approximately a drop per second and also found accumulated water on the 
concrete where the tank is mounted.
The amount of leakage is estimated to be approximately 10 liters. We 
re-torqued the bolt at the joint of the tank, and confirmed that the water 
dripping had stopped at around 12:35 pm on the same day.
In addition, in order to prevent the water leakage from spreading, we 
stacked sand bags around the accumulated water.

Regarding this matter, we received a directive* titled "Action in the 
event of water or radioactive material leakage from the storage tank of 
water desalination at Fukushima Daiichi Nuclear Power Station" from the 
Nuclear and Industrial Safety Agency (NISA) on January 11, 2012. 
                                 (previously announced on January 11, 2012)

At around 12:30 pm on February 3, we found ooze at the tank joint of the 
concentrated storage tank of Water Desalinations (Reverse Osmosis Membrane). 
We retightened the joint bolts afterwards, and at around 2:44 pm on the 
same day, we confirmed that the ooze from the joint had been stopped.
Although there was not accumulated water on the concrete on which the tank 
is mounted and no leakage to the sea was found, we stacked sand bags 
around the accumulated water as a precautionary measure. 
Regarding this matter, we received the directive* titled "Action in the 
event of water or radioactive material leakage from the storage tank of 
water desalination at Fukushima Daiichi Nuclear Power Station (additional 
direction)" from NISA on February 3. 
                                 (previously announced on February 4, 2012)

Out of the directive received on February 3, we have reported on the 
results of investigation and countermeasure on the outdoor storage tank to 
NISA today.

Attachment
·Report on the investigation result regarding the "Action in the event of 
 water or radioactive material leakage from the storage tank of water 
 desalination at Fukushima Daiichi Nuclear Power Station 
 (additional direction)"
 * The attachment file will be posted later.

* We have provided a Japanese press release version of the instruction 
  document received from NISA. However, at this time we have reserved the 
  right to not provide an English version due to potential 
  misunderstandings that may arise from an inaccurate rendering of the 
  original Japanese text. 
  We may provide the English translation that NISA releases in our press 
  releases. However, in principle we would advise you to visit the NISA 
  website for timely and accurate information.