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
2026 ANS Annual Conference
May 31–June 3, 2026
Denver, CO|Sheraton Denver
Latest Magazine Issues
Mar 2026
Jan 2026
Latest Journal Issues
Nuclear Science and Engineering
March 2026
Nuclear Technology
February 2026
Fusion Science and Technology
April 2026
Latest News
Kentucky disburses $10M in nuclear grants
The Kentucky Nuclear Energy Development Authority (KNEDA) recently distributed its first awards through the new Nuclear Energy Development Grant Program, which was established last year. In total, KNEDA disbursed $10 million to a variety of companies that will use the funding to support siting studies, enrichment supply-chain planning, workforce training, and curriculum development.
Kun Jie Yang, Yue-Lin Liu, Ning Liu, Peng Shao, Xu Zhang, Yuming Ma
Fusion Science and Technology | Volume 76 | Number 5 | July 2020 | Pages 616-631
Technical Paper | doi.org/10.1080/15361055.2020.1740556
Articles are hosted by Taylor and Francis Online.
We performed systematically first-principles calculations to investigate interstitial H diffusion/permeation of temperature dependence in tungsten (W). The interstitial H diffusion is primarily through two nearest-neighbor tetrahedral positions and its activation energy increases significantly with rising temperature. Phonon vibration plays a decisive role in the behavior of the H activation energy with rising temperature. The H permeation activation energy also depends strongly on the temperature since it is the sum of the formation energy and diffusion activation energy of H. Our calculated H diffusivity/permeability with the temperature agree quantitatively with the reliable experimental data within the error range in W. The vacancy-capturing effect can give a reasonable explanation of the discrepancy between simulation and experiment. Although the diffusion/permeation activation energy and the prefactor strongly depend on the temperature, the diffusivity/permeability of H still obeys quasi-Arrhenius behavior with rising temperature, which is attributed to the compensation effect between the activation energy and the prefactor, i.e., the increment of the prefactor compensates directly the modification of the diffusivity/permeability in the case of a variation in the activation energy with rising temperature.