Since Japan's dual natural disasters last month, Tokyo Electric Power Company (TEPCO) has been cooling fuel rods with seawater at the Fukushima Daiichi nuclear plant to prevent a meltdown. Some of this water has escaped or been released into the Pacific. But about 87,500 tons of water contaminated with radioactive materials remains sitting in storage tanks and complicating the plant's repair efforts.
To deal with the problem, TEPCO told Reuters yesterday they will treat the water with a process developed by Toshiba, Hitachi-GE Nuclear Energy, Areva, and Kurion, a small U.S. start-up. I first wrote about Kurion's efforts a year ago to expand vitrification's role in nuclear waste containment within the United States. Vitrification (shown above) is a process that can turn liquid nuclear waste into glass rods for storage—aiding with possible leakage and handling issues. Since then, Kurion began testing its Modular Vitrification System, went into contract with engineering company CH2MHill to help clean up Washington State's Hanford site and recently, caught the interest of TEPCO.
The Japanese company says in June they will begin adsorbing and separating the radioactive elements from its stored water. The liquid could then resume its previous cooling responsibilities. Particulars on the collaborative clean-up strategy they are adopting are currently scarce. But for its part, Areva says it will use chemical reagents to isolate and then recover radioactive elements as it does in its French nuclear facilities Marcoule and La Hague.
How Kurion's glass tech might come into play hasn't been made clear, but Greentech Media reports:
TEPCO in this situation is dealing with seawater, not spent fuel. Thus, it probably isn’t looking for full vitrification treatment. Instead, TEPCO will likely exploit Kurion’s ion-specific media for pre-treating spent fuel before vitrification begins.
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Image: Pacific Northwest National Laboratory
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