Trouble continues at Fukushima nuclear plant’s AREVA water treatment system

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TOKYO (Kyodo) — A desalination device that forms part of the crisis-hit Fukushima Daiichi nuclear power plant’s key water decontamination system halted for a number of hours Sunday in the latest glitch at the plant, Tokyo Electric Power Co. said late Sunday.

The plant operator said it resumed desalinating decontaminated water to be recycled as coolant for troubled reactors with a backup device about seven and a half hours after the halt occurred around noon, while continuing to cool the reactors with water supplemented from a nearby dam.

While looking into the cause of the latest trouble, Tokyo Electric said it will also add piping for the system’s cesium decontamination component made by Areva SA of France because the volume of flow has not reached the expected level.

The water treatment system, which also comprises a cesium-absorbing device developed by Kurion Inc. of the United States, is designed to remove radioactive materials from and recycle the highly contaminated water accumulating at the plant as a side effect of initial emergency operations to cool overheating reactors.
(Mainichi Japan) July 25, 2011

Email notification from TEPCO: “The water treatment system at Fukushima I Nuclear Power Plant resumed operation at 9:40AM on July 24 but an alarm sounded at about 12PM, and the system has shut down automatically.”

From the tweet of an anonymous worker at Fukushima I Nuke Plant:
The clogged-up pipes are at AREVA’s system.

Tokyo Electric Power Co. (TEPCO) begins a trial run of a contaminated water treatment system, developed by France’s Areva SA, on June 15. (Photo courtesy of TEPCO)
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