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.
Division Spotlight
Reactor Physics
The division's objectives are to promote the advancement of knowledge and understanding of the fundamental physical phenomena characterizing nuclear reactors and other nuclear systems. The division encourages research and disseminates information through meetings and publications. Areas of technical interest include nuclear data, particle interactions and transport, reactor and nuclear systems analysis, methods, design, validation and operating experience and standards. The Wigner Award heads the awards program.
Meeting Spotlight
ANS Student Conference 2025
April 3–5, 2025
Albuquerque, NM|The University of New Mexico
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
Apr 2025
Jan 2025
Latest Journal Issues
Nuclear Science and Engineering
May 2025
Nuclear Technology
April 2025
Fusion Science and Technology
Latest News
First astatine-labeled compound shipped in the U.S.
The Department of Energy’s National Isotope Development Center (NIDC) on March 31 announced the successful long-distance shipment in the United States of a biologically active compound labeled with the medical radioisotope astatine-211 (At-211). Because previous shipments have included only the “bare” isotope, the NIDC has described the development as “unleashing medical innovation.”
Takayuki Terai, Akihiro Suzuki, Satoru Tanaka
Fusion Science and Technology | Volume 30 | Number 3 | December 1996 | Pages 911-915
Fuel Cycle and Tritium Technology | doi.org/10.13182/FST96-A11963054
Articles are hosted by Taylor and Francis Online.
The 2:1 mixture of LiF and BeF2 (Flibe) is a potential liquid tritium breeding material for fusion reactors, because of low electric conductivity, high chemical stability in air, etc. We have been studying tritium release behavior from Flibe by in-pile tritium release experiment in the fast neutron source reactor “YAYOI” of the University of Tokyo. About 100g of Flibe was utilized for neutron irradiation to produce tritium, and the tritium released from the specimen was swept by making purge gas flowing over the specimen. Tritium release rate increased with elapsed time after the start of irradiation and a steady state was attained in about four hours at 873K in case of H2 purge gas. Released chemical forms of tritium were HT and TF, and their proportions depended not on the kind of container and tubing materials, but on the chemical composition of purge gas and the dehumidification time of specimen at high temperatures. Tritium generated as T+ in Flibe was released by way of two routes; (1) direct release to purge gas as TF and (2) release to purge gas after converted to HT by the isotopic exchange reaction with H2. The reaction rate was controlled by the H2 concentration and F+ potential in the system. In case of high hydrogen concentration and low F+ potential in the system, tritium was released as HT with a relatively high rate. In case of high F+ potential in the system, on the other hand, tritium was released as TF with a low rate.
