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Division Spotlight
Robotics & Remote Systems
The Mission of the Robotics and Remote Systems Division is to promote the development and application of immersive simulation, robotics, and remote systems for hazardous environments for the purpose of reducing hazardous exposure to individuals, reducing environmental hazards and reducing the cost of performing work.
Meeting Spotlight
Utility Working Conference and Vendor Technology Expo (UWC 2024)
August 4–7, 2024
Marco Island, FL|JW Marriott Marco Island
Standards Program
The Standards Committee is responsible for the development and maintenance of voluntary consensus standards that address the design, analysis, and operation of components, systems, and facilities related to the application of nuclear science and technology. Find out What’s New, check out the Standards Store, or Get Involved today!
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Nuclear Science and Engineering
August 2024
Nuclear Technology
Fusion Science and Technology
Latest News
ARPA-E announces $40 million to develop transmutation technologies for UNF
The Department of Energy’s Advanced Research Projects Agency–Energy (ARPA-E) announced $40 million in funding to develop cutting-edge technologies to enable the transmutation of used nuclear fuel into less-radioactive substances. According to ARPA-E, the new initiative addresses one of the agency’s core goals as outlined by Congress: to provide transformative solutions to improve the management, cleanup, and disposal of radioactive waste and spent nuclear fuel.
Baoling Zhang, Shuoyang Fang, Jun Wang, Xue Su, Shujian Tian
Fusion Science and Technology | Volume 77 | Number 6 | August 2021 | Pages 437-445
Technical Paper | doi.org/10.1080/15361055.2021.1927583
Articles are hosted by Taylor and Francis Online.
Helium bubble growth and coalescence in the slip plane as well as the influence on substrate were studied using the molecular dynamics method. In the slip plane, the helium bubbles grow first along the slip plane and then grow toward the side which is short one atomic layer in the form of a hexagonal structure at low temperature. The growth rates of helium bubbles are related to the addition rate of helium atoms and their surrounding environments. After coalescence, the coalesced helium bubble grows first toward the side that is short one atomic layer. Then it grows along the slip plane with a velocity less than the growth rate before coalescence. Helium bubble growth and coalescence in the slip plane have significant influence on the substrate. During the process, the preexisting slipping metal atoms are pushed back to the normal lattice sites, and the crystal structure of the metal is recovered around the helium bubbles. The recovered area changes with the number of helium atoms in the bubble and the temperature of the substrate. The simulation results indicate that the preexisting grain boundary is beneficial for enhancing the helium damage resistance of metal.