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Tokyo Electric Power Company (TEPCO) has completed the construction of a system at the disabled Fukushima Daiichi nuclear power plant to release treated and diluted water into the ocean. The system consists of large pipes for diluting the water, emergency shut-off valves, and training simulators for operators. The water used to cool melted nuclear fuel at the plant has been stored in tanks and filtered to remove most of the radioactive materials, but still contains traces of radioactive isotopes. The Japanese government plans to begin releasing the water into the ocean this summer after further dilution.
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