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Fueling nuclear power with seawater

When you take a dip in the ocean, nuclear fuel is probably the farthest thing from your mind. Uranium floats in Earths oceans in trace amounts of just 3 parts per billion, but it adds up. Combined, our oceans hold up to 4.5 billion tons of uranium enough to potentially fuel the worlds nuclear power plantsfor 6,500 years.

Countries such as Japan have examined the ocean as a uranium source since the 1960s, but previous approaches have been too expensive to extract the quantities needed for nuclear fuel. Now researchers at the Department of Energys Pacific Northwest National Laboratory and Oak Ridge National Laboratory are tweaking one of those conceptswith the goal of making it more efficient and cost-competitive. The research is being done for the Department of Energys Office of Nuclear Energy.

Japan developed an adsorbent that attaches the uranium-loving chemical group amidoxime to a plastic polymer. ORNL examined the binding process between the plastic and chemical groups and used that knowledge to enhance the uranium-grabbing characteristic of the amidoxime groups on the adsorbent materials surface.

PNNL tested the adsorbents performance at its Marine Sciences Laboratory in Sequim, Wash., DOEs only marine research facility. Using filtered seawater from nearby Sequim Bay, PNNL established a laboratory testing process to measure the effectiveness of both Japans and ORNLs adsorbent materials. Initial tests showed ORNLs adsorbent can soak up more than two timesthe uranium than the material from Japan.


Contact: Franny White
DOE/Pacific Northwest National Laboratory

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