At around 12:30pm, May 11, 2011, employees who had been conducting 
vertical shaft obstruction work, confirmed water flowing into the 
pit* via power cable pipe lines. 
Currently, together with investigating the possible leakage of water 
including radioactive materials to the outside of the boundary, we have 
taken samples of the water in the pit and the seawater in the intake 
canal of Unit 3, and analyses are underway at Fukushima Daini Nuclear 
Power Station.

We will conduct water stoppage measures in the pit.

In addition, we have been orally instructed by the Nuclear and Industrial 
Safety Agent (NISA) as follows:
-To confirm an impact to the ocean
-To immediately conduct water stoppage measures
-To immediately identify the route of the inflow/outflow and the situation 
 and report to NISA

We will take measures to follow the above instruction.

* pit: A vertical shaft made of concrete 

attachment:Seawater Piping Duct of Unit 3(PDF 16.1KB)