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Tepco unable to halt tainted water flowing into tunnels at Fukushima via Japan Times

Tokyo Electric Power Co. appears unable to stem the flow of radioactive water from the No. 2 reactor building to underground tunnels at the Fukushima No. 1 power plant, officials said.

Tepco has injected cement into the joints that connect the tunnels, which are used to run cables, and the building to halt the flow of contaminated water and remove accumulations from the tunnels.

But water levels suggest the effort has remained unsuccessful so far, the officials said. The company began the cement injections after failing to create an “ice wall” during the summer by freezing water inside the joints that would have blocked the flows.

After the cement injections, Tepco pumped 200 tons of tainted water out of the tunnels Monday, causing levels inside to fall around 20 cm, the officials said.

However, if the joints were completely sealed, water levels would have fallen roughly 80 cm, the officials said, indicating the possibility that contaminated water is still flowing into the tunnels.

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