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.
Explore membership for yourself or for your organization.
Conference Spotlight
Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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 2025
Jan 2025
Latest Journal Issues
Nuclear Science and Engineering
August 2025
Nuclear Technology
Fusion Science and Technology
Latest News
ANS joins others in seeking to discuss SNF/HLW impasse
The American Nuclear Society joined seven other organizations to send a letter to Energy Secretary Christopher Wright on July 8, asking to meet with him to discuss “the restoration of a highly functioning program to meet DOE’s legal responsibility to manage and dispose of the nation’s commercial and legacy defense spent nuclear fuel (SNF) and high-level radioactive waste (HLW).”
Winfried Amian, Detlev Stöver
Nuclear Technology | Volume 61 | Number 3 | June 1983 | Pages 475-486
Technical Paper | New Directions in Nuclear Energy with Emphasis on Fuel Cycles / Nuclear Fuel | doi.org/10.13182/NT61-475
Articles are hosted by Taylor and Francis Online.
Fractional releases of silver and cesium from irradiated silicon-carbide-layered coated particles have been measured during isothermal anneals in the temperature range between 1273 and 1773 K. The release rates measured have been evaluated with the aid of a statistical numerical treatment based on a simple diffusion model in multizone geometry. The resulting diffusion coefficients can be described byfor silver andfor cesium, respectively. A statistical treatment of the data gives corresponding 95% confidence limits. It is argued that the pathway of cesium and silver transport in siliconcarbide layers is grain boundary diffusion. This explains the large scatter found in the data for coating layers because the defect structure depends on the individual manufacturing conditions and varies from coating to coating. Comparison with data from the literature shows the superiority of silicon carbide with respect to silver retention relative to diffusion rates in pyrocarbons, while cesium data indicate no distinct improvement.