Work on leakage-prevention wall at Fukushima plant fully in progress
The operator of the crippled Fukushima Daiichi nuclear power plant said Wednesday that work is now fully in progress to build a wall along the Pacific coast, where the nuclear complex is located, to reduce the risks of further contaminating the sea with radioactive substances.

The wall is intended to prevent highly radioactive water accumulating in the plant's reactor turbine buildings from leaking out into the sea by getting mixed with groundwater, although Tokyo Electric Power Co. believes that such an incident is unlikely to happen.
[link to english.kyodonews.jp]
.