Nuclear Energy Waste Transmutation Optimized Now (NEWTON) SBIR/STTR, DE-FOA-0003419

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These facilities provide advanced tools of modern science including accelerators, colliders, supercomputers, light sources and neutron sources, as well as facilities for studying the nanoworld, the environment, and the atmosphere. Projects focused on early-stage R&D for the improvement of technology along defined roadmaps may be more appropriate for support through the DOE applied energy offices including: the Office of Energy Efficiency and Renewable Energy (http://www.eere.energy.gov/), the Office of Fossil Energy and Carbon Management (https://www.energy.gov/fecm/office-fossil-energy-and-carbon-management), the Office of Nuclear Energy (http://www.energy.gov/ne/office-nuclear-energy), and the Office of Electricity (https://www.energy.gov/oe/office-electricity). Program Overview: The Nuclear Energy Waste Transmutation Optimized Now (NEWTON) program will support the research and development of technologies that enable the transmutation of used nuclear fuel (UNF) to alleviate the impact of storage in permanent disposal facilities. This program seeks to fund the development of novel technologies that increase the overall capacity factor, power output, and efficiency of particle generation systems (including but not limited to proton, neutron, and/or photon), by reducing beam trip magnitude and duration (referred to as loss of beam). Additional technologies will focus on increasing the throughput of transmutation by developing target materials that maximize transmutation rates and are easily processible to remove the transmuted material. The United States does not currently have an active facility for the permanent disposal of used nuclear fuel derived from the civilian nuclear sector. Used nuclear fuel comprises several classes of isotopes that could be processed in different ways due to their economic value. Firstly, uranium (U), which comprises greater than 95% of the mass of UNF, can be reprocessed and converted back into fuel for light-water reactors through the addition of small amounts of uranium-235 (U-235). Secondly, plutonium (Pu) and minor actinides (MAs), such as neptunium (Np), americium (Am), and curium (Cm), which together comprise roughly 1.5% of UNF by mass, are produced from nuclear fission. Many of these isotopes are fissionable and could be incorporated into fuels designed for advanced reactor concepts. Intermediate-lived fission products (ILFPs) including strontium-90 (Sr-90) and caesium-137 (Cs-137) have relatively short half-lives of roughly 30 years and have applications in radioisotope thermoelectric generators for space applications. However, ILFPs are largely destined for permanent disposal in a deep geological repository. The major long-lived fission products (LLFPs) have half-lives exceeding 200,000 years and have few commercial applications. LLFPS include selenium-79 (Se-79),technetium-99 (Tc-99), tin-126 (Sn-126), iodine-129 (I-129), and caesium-135 (Cs-135). The last class of isotopes are the stable isotopes produced from nuclear fission and resulting decay. These isotopes could be extracted from UNF, but no commercial processing of these have been undertaken. A deep geological disposal facility for the disposition of UNF in the U.S. has been estimated to cost $96.18 billion over the 150-year lifetime, after which the facility would cease to accept new waste. This facility would be able to store 70,000 metric tons (MT) of unprocessed UNF, which is insufficient for the existing volume of civilian waste. Densification of the waste can be accomplished through removal of the plutonium, minor actinides, and ILFP components of the UNF. Removal of 99.9% of these components would allow a densification factor of 225, based on current disposal requirements, thus allowing a single repository to store upwards of approximately 16 million MT of UNF. The LLFPs are responsible for many of the engineered barriers that are required to be built in the repository due to their long half-lives and environmental mobility. Removal of these LLFPs could decrease the capital expenditure of a permanent geological repository while also improving safety. To view the FOA in its entirety, please visit https://arpa-e-foa.energy.gov.