ANS is committed to advancing, fostering, and promoting the development and application of nuclear sciences and technologies to benefit society.
Explore the many uses for nuclear science and its impact on energy, the environment, healthcare, food, and more.
Division Spotlight
Fuel Cycle & Waste Management
Devoted to all aspects of the nuclear fuel cycle including waste management, worldwide. Division specific areas of interest and involvement include uranium conversion and enrichment; fuel fabrication, management (in-core and ex-core) and recycle; transportation; safeguards; high-level, low-level and mixed waste management and disposal; public policy and program management; decontamination and decommissioning environmental restoration; and excess weapons materials disposition.
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!
Latest Magazine Issues
Jul 2024
Jan 2024
Latest Journal Issues
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.
T. Okita, K. Asari, S. Fujita, M. Itakura
Fusion Science and Technology | Volume 66 | Number 1 | July-August 2014 | Pages 289-294
Technical Paper | doi.org/10.13182/FST13-756
Articles are hosted by Taylor and Francis Online.
Molecular dynamics simulations were conducted using six interatomic potentials for face-centered cubic metals that differed only in the stacking fault energies (SFEs). We investigated the effects of the SFE on interactions between an edge dislocation and a void of 4.0 nm diameter at 13 intersection positions. In the high SFE, most interaction morphologies at the depinning are such that the two partial dislocations reverse into the perfect dislocation locally at the void interface. In contrast, in the low SFE, the partial dislocations are depinned individually from the void with some certain time lag. The critical resolved shear stress (CRSS) is not symmetrical about the center of the void. CRSS is higher when the center of the void is located not on the glide plane, but in the compressive side of the edge dislocation. In some cases for these conditions, climb motion is observed, which further increases CRSS. The probability of climb motion occurrence is higher with higher SFE. In lower SFE, climb motion occurs temporarily, followed by the disappearance of jog by dislocation releasing several vacancies inside of the void. CRSS is higher with higher SFE for all the intersection positions.