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.
Education, Training & Workforce Development
The Education, Training & Workforce Development Division provides communication among the academic, industrial, and governmental communities through the exchange of views and information on matters related to education, training and workforce development in nuclear and radiological science, engineering, and technology. Industry leaders, education and training professionals, and interested students work together through Society-sponsored meetings and publications, to enrich their professional development, to educate the general public, and to advance nuclear and radiological science and engineering.
2020 ANS Virtual Winter Meeting
November 15–19, 2020
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
Latest Journal Issues
Nuclear Science and Engineering
Fusion Science and Technology
UWC 2020: A call for transformational change
Bowing to current COVID-19 realities but buoyed by the success of June’s virtual Annual Meeting, ANS event planners returned to the virtual realm for this year’s Utility Working Conference. Originally scheduled for August 9–12 at Marco Island, Fla., the condensed event was held Wednesday, August 11, wherever registrants’ computer devices happened to be located.
In addition to 26 educational sessions and workshops, UWC 2020 featured an opening plenary session titled “Achieving Transformational Change: A leadership discussion,” moderated by Bob Coward, MPR Associates principal officer and ANS past president (2017–2018). Plenary panelists included representatives from three utilities—Arizona Public Service (APS), Exelon, and Xcel Energy—plus the Institute of Nuclear Power Operations (INPO) and the Nuclear Regulatory Commission.
D. R. Harding, D. Whitaker, C. Fella
Fusion Science and Technology | Volume 70 | Number 2 | August-September 2016 | Pages 173-183
Technical Paper | dx.doi.org/10.13182/FST15-211
Articles are hosted by Taylor and Francis Online.
The accepted mechanism for the formation of a deuterium-tritium (D-T) ice layer is that mass evaporates (sublimes) from the warmer regions of the shell and deposits in the cooler regions. Recent observations of the early-stage formation of single-crystal ice layers in OMEGA targets show that the rate and direction of crystal growth are influenced by liquid wicking to the crystal growth surface. This behavior is attributed to the ice-liquid interface possessing a lower surface energy than the ice-vapor interface, and the amount of liquid transported by this process is determined by the size, position, and growth rate of the initial seed crystal. Appreciating this behavior allowed us to define an improved cooling ramp that balances the rate at which heat was removed from the target with the supply of liquid to the crystal growth surface. The time and temperature parameters used to form a seed crystal and then grow the crystal into a complete ice layer are presented. One benefit of this process may be fewer defects in the ice layer. The target was cooled to 0.6 K below the temperature where it was formed before strain-induced crystallographic features developed. An estimate of the extent of fractionation of D2, D-T, and T2 isotopes during the freezing cycle was based on the thickness uniformity of the ice layer and how the crystal grew. The region where the ice layer initially formed was 4% thinner than the region where its formation was complete. The alignment of this perturbation to the ice layer with the growth axis of the crystal suggests, to a first-order approximation, that the area of the crystal that first formed possessed a higher fraction (~4%) of tritium atoms.