Fukushima NPP ice wall equipment in place

21 February 2016

The installation of the equipment required for forming a wall of frozen soil at the Fukushima Daiichi nuclear power plant to prevent groundwater entering the reactor buildings has been completed. Approval from the Japanese regulator must be sought before the creation of the wall itself can begin.

Tokyo Electric Power Company (Tepco) has recently declared that all the necessary equipment is now in place for the creation of the ice wall. However, the company noted that it must get approval from the Nuclear Regulation Authority before the equipment can be put into operation. Reducing the amount of contaminated water that it must deal with is a priority for Tepco. Groundwater naturally seeps from land to sea, but at the Fukushima Daiichi site it must negotiate the basements of reactors buildings. The ice wall is only one part of a multi-layered strategy being employed to manage the flow of groundwater and rainwater at Fukushima Daiichi, Tepco said. The strategy to prevent water becoming contaminated has reduced the daily inflow of groundwater into the buildings to 150 tonnes per day.

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