The nation needs to establish a formal, "risk-informed" approach to decide what types and amounts of radioactive waste at U.S. Department of Energy sites should be buried or left in place rather than shipped to a geological repository, such as the one proposed for Yucca Mountain, Nev., says a new report from the National Academies’ National Research Council.
"Given the controversy surrounding this issue and the reality that not all of the waste will or can be recovered and disposed of off-site, the country needs a structured, well-thought-out way to determine which wastes can stay," said David E. Daniel, chair of the committee that wrote the report and dean, College of Engineering, University of Illinois, Urbana-Champaign. "Information about the relative risks posed by various disposal options is vital to the decision-making process, and that information must be developed in a manner the public can trust."
The committee did not identify specific wastes that should be approved for alternative disposal. It did find, however, that it is "technically impractical and unnecessary" to remove every last gram of high-level radioactive waste now stored in steel tanks at DOE sites in South Carolina, Washington, and Idaho. Some transuranic waste currently buried at these sites -- which consists of contaminated tools, clothing, and other debris -- may not need to be removed either. The committee did not comment on how waste remaining on-site should be disposed of.
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10.02.2017 | Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung
In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport
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The Fraunhofer IWS Dresden and Technische Universität Dresden inaugurated their jointly operated Center for Additive Manufacturing Dresden (AMCD) with a festive ceremony on February 7, 2017. Scientists from various disciplines perform research on materials, additive manufacturing processes and innovative technologies, which build up components in a layer by layer process. This technology opens up new horizons for component design and combinations of functions. For example during fabrication, electrical conductors and sensors are already able to be additively manufactured into components. They provide information about stress conditions of a product during operation.
The 3D-printing technology, or additive manufacturing as it is often called, has long made the step out of scientific research laboratories into industrial...
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Nanometer-scale magnetic perforated grids could create new possibilities for computing. Together with international colleagues, scientists from the Helmholtz Zentrum Dresden-Rossendorf (HZDR) have shown how a cobalt grid can be reliably programmed at room temperature. In addition they discovered that for every hole ("antidot") three magnetic states can be configured. The results have been published in the journal "Scientific Reports".
Physicist Dr. Rantej Bali from the HZDR, together with scientists from Singapore and Australia, designed a special grid structure in a thin layer of cobalt in...
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