Experts to freeze earth around crippled Japanese nuclear plant to stop radioactive water contamination.
Officials at the Fukushima Daiichi nuclear power station in Japan have shown an underground wall of ice they are building to stop radioactive water from leaking from the facility.
Tepco, the owner of the station, which is still crippled three years after an earthquake and tsunami set off nuclear meltdowns in the region, has been fighting a continuous battle to deal with hundreds of thousands of tonnes of contaminated water.