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Division Spotlight
Mathematics & Computation
Division members promote the advancement of mathematical and computational methods for solving problems arising in all disciplines encompassed by the Society. They place particular emphasis on numerical techniques for efficient computer applications to aid in the dissemination, integration, and proper use of computer codes, including preparation of computational benchmark and development of standards for computing practices, and to encourage the development on new computer codes and broaden their use.
Meeting Spotlight
Conference on Nuclear Training and Education: A Biennial International Forum (CONTE 2025)
February 3–6, 2025
Amelia Island, FL|Omni Amelia Island Resort
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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Fusion Science and Technology
Latest News
Christmas Night
Twas the night before Christmas when all through the houseNo electrons were flowing through even my mouse.
All devices were plugged in by the chimney with careWith the hope that St. Nikola Tesla would share.
Jihong Chen, Liping Guo, Fengfeng Luo, Tiecheng Li, Yaoyao Ren, Jinping Suo
Fusion Science and Technology | Volume 66 | Number 2 | October 2014 | Pages 301-307
Technical Paper | doi.org/10.13182/FST13-714
Articles are hosted by Taylor and Francis Online.
Single-beam (He+ or H+) and sequential-beam (He+/H+ or H+/He+) irradiation of reduced-activation martensitic steels at 450°C was carried out to investigate helium/hydrogen synergistic effects on the microstructure of the steels. After helium implantation, a very low density of helium bubbles was observed. No void was observed after hydrogen implantation. For the He+/H+ sequential-beam irradiation, the number density of bubbles increased rapidly at low hydrogen dose, and the average size of bubbles increased at higher hydrogen dose. Helium bubbles were also found in the H+/He+ sequential-beam irradiated specimen, but its swelling was smaller than that for the He+/H+ sequential conditions. It was concluded that the effect of hydrogen atoms on the nucleation and growth of bubbles may enhance the diffusion of helium-atom/helium-vacancy clusters. Hydrogen irradiation after helium irradiation can increase the nucleation and growth of helium bubbles, while helium bubbles may enhance the retention of hydrogen atoms to form He-H-vacancy complexes.
