As announced in "Roadmap towards Restoration from the Accident at Fukushima 
Daiichi Nuclear Power Station" on July 19, 2011, we are in consideration of 
water shield wall to prevent further seawater contamination by underground 
water, and to start construction during the Step 2 period. 

We have now decided to pre-install water shield wall in front of the 
existing sea walls of Unit 1 to 4, to prevent further seawater 
contamination by underground water. 

We will compile the design in an early stage, and start construction within 
the Step 2 period.  

Attachment: 
 Basic Principle regarding Water Shield Wall to prevent further Seawater 
 Contamination(PDF 105KB)