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
Thermal Hydraulics
The division provides a forum for focused technical dialogue on thermal hydraulic technology in the nuclear industry. Specifically, this will include heat transfer and fluid mechanics involved in the utilization of nuclear energy. It is intended to attract the highest quality of theoretical and experimental work to ANS, including research on basic phenomena and application to nuclear system design.
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
Norway’s Halden reactor takes first step toward decommissioning
The government of Norway has granted the transfer of the Halden research reactor from the Institute for Energy Technology (IFE) to the state agency Norwegian Nuclear Decommissioning (NND). The 25-MWt Halden boiling water reactor operated from 1958 to 2018 and was used in the research of nuclear fuel, reactor internals, plant procedures and monitoring, and human factors.
K. Kotoh, M. Tanaka, T. Sakamoto, S. Takashima, T. Asakura, T. Uda, T. Sugiyama
Fusion Science and Technology | Volume 56 | Number 1 | July 2009 | Pages 184-189
Tritium, Safety, and Environment | Eighteenth Topical Meeting on the Technology of Fusion Energy (Part 1) | doi.org/10.13182/FST09-A8899
Articles are hosted by Taylor and Francis Online.
Authors have been studying the adsorption or/and desorption behavior of H2 or/and D2 with synthetic zeolite packed-beds under the cryogenic condition of liquid nitrogen temperature, aiming at developing a pressure swing adsorption (PSA) process of hydrogen isotope separation useful for tritium processing in fusion fuel cycle and environmental tritium safety confinement, or convenient for deuterium production. We examined the mass transfer in the adsorption system of D2 diluted in H2 with zeolite packed-beds, experimentally and analytically. The results have been presented, where it is shown that the enrichment factor of D2 in packed-beds matches with estimated from the isothermal adsorption characteristics and that the mass transfer is controlled in the macro-pore media of adsorbents. In this work, the behavior of tracer HD added in a H2-D2 mixture with zeolite 5A and 13X packed-beds was experimentally investigated, and was analyzed by the curve-fitting as well as for the behavior of D2. In this report, the experimental results demonstrate that the breakthrough curves of HD exhibit analogous to those of D2 but reduced in the breakthrough time in comparison to the latter. The analytical results verify that the HD/H2 separation factor in packed-beds agrees with predicted from the isothermal adsorption characteristics, and show that the isotope effect on the mass transfer depends on the molecular mass effect.