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Japan:TEPCO to use filters at plant

Thursday, June 9, 2011

Laaska News  June 9,2011

The operator of the damaged Fukushima nuclear power plant has briefed Japan’s nuclear regulator on equipment for removing highly radioactive substances in water at the facility.

The Tokyo Electric Power Company, or TEPCO, reported on the functions of the US and French devices to the Nuclear and Industrial Safety Agency on Thursday, a week before the firm plans to start using the equipment.

TEPCO says it will separate oil from contaminated water before transferring it to US-made equipment that absorbs radioactive cesium using minerals including zeolite. The water is then to be transferred to French-made equipment that absorbs radioactive substances using chemicals.

The company says the devices will reduce the concentration of radioactive substances in the water to one-thousandth to one-ten-thousandth of the current level.

TEPCO plans to remove salt from the decontaminated water before storing it in tanks to use it to cool the plant’s reactors.

More than 105,000 tons of water contaminated with highly radioactive substances has accumulated in the basements of the plant’s reactor and turbine buildings, hampering efforts to bring the plant under control.

About 500 tons of such water is accumulating daily amid continued injections of fresh water into the reactors to cool them. TEPCO plans to decontaminate 1,200 tons of such water daily.

The firm plans to obtain the consent of the agency and begin testing the devices on Friday.

TEPCO says it will use facilities at the plant to store highly radioactive waste to be produced in the filtering process. But the firm has not decided how to decontaminate the waste.

NHK.

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