Glass could contain radioactive waste

Researchers at Rutgers have determined that certain radioactive isotopes could safely be encased in glass for long-term storage. The scientists were working with iodine-129, which is particularly persistent. By encasing the iodine in ceramics and glass, they were able to isolate the dangerous element, store it at room temperature and store it indefinitely.

Without containment, iodine-129 disperses easily into the air and water. In humans, iodine-129 can easily damage sensitive organs and tissues, and is known to cause cancer. Iodine-129 has a half-life of nearly 16 million years, which means, practically speaking, that it will never achieve a human-safe state.

The US Department of Energy was one of the primary funding sources for the research. The DOE hopes to use the findings to address the broader issue of radioactive waste containment and disposal. Although the Rutgers research has concentrated on radioactive iodine, the method may be useful in encapsulating other forms of radioactive waste, including spent fuel rods from nuclear power plants. Currently, spent fuel rods are stored in place at nuclear power plants. Being able to dispose of the exhausted rods safely could make nuclear power more attractive.

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Photo Credit: Albert Kruger/U.S. Department of Energy