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Aerospace Nuclear Science & Technology
Organized to promote the advancement of knowledge in the use of nuclear science and technologies in the aerospace application. Specialized nuclear-based technologies and applications are needed to advance the state-of-the-art in aerospace design, engineering and operations to explore planetary bodies in our solar system and beyond, plus enhance the safety of air travel, especially high speed air travel. Areas of interest will include but are not limited to the creation of nuclear-based power and propulsion systems, multifunctional materials to protect humans and electronic components from atmospheric, space, and nuclear power system radiation, human factor strategies for the safety and reliable operation of nuclear power and propulsion plants by non-specialized personnel and more.
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2024 ANS Annual Conference
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Las Vegas, NV|Mandalay Bay Resort and Casino
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Fusion Energy Week begins today
Fusion is riding a surge of attention that began in December 2022 when researchers at Lawrence Livermore National Laboratory’s National Ignition Facility achieved fusion ignition. The organizers of Fusion Energy Week—a group called the U.S. Fusion Outreach Team—on the other hand, trace fusion development back 100 years to the doctoral research of Cecilia Payne-Gaposchkin, who discovered that stars, including our Sun, are mostly made of hydrogen and helium, which in turn led to the understanding that those elements are the “fuel” of potential fusion energy systems on Earth. In recognition of Payne-Gaposchkin’s birthday—May 10—the U.S. Fusion Outreach Team plans to hold a “grassroots celebration of fusion energy” May 6–10, 2024, and annually during the second week of May.
Sosuke Kondo, Keyong Hwan Park, Yutai Katoh, Akira Kohyama
Fusion Science and Technology | Volume 44 | Number 1 | July 2003 | Pages 181-185
Technical Paper | Fusion Energy - Fusion Materials | doi.org/10.13182/FST03-A330
Articles are hosted by Taylor and Francis Online.
High temperature and high dose irradiation effects on microstructural evolution in high purity -SiC was studied by Single- and dual-ion irradiation, where 5.1 MeV Si2+ ions for displacement damage and 1 MeV He+ ions for (n, ) simulation were implanted at 1673 K. From a cross-sectional transmission electron microscopy (XTEM) study of the -SiC irradiated with single-ion up to a dose of 100 dpa, high density dislocation loops were observed. Sizes and concentrations of the loops are dependant on displacement damage level. In the dual-ion irradiated specimen, dislocation network was observed through the dual-ion irradiated region. At the same time, cavities were formed in both the grain and grain boundary. In front of the irradiated surface, localized growth of the cavities was observed. TEM micrographs demonstrate that the helium had a large mobility on grain boundary and dislocation network under high temperature irradiation. It is clarified that helium largely contributes to the development of irradiation-induced microstructural defects. The formation mechanisms of microstructural defects were also discussed.