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
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
International Conference on Mathematics and Computational Methods Applied to Nuclear Science and Engineering (M&C 2025)
April 27–30, 2025
Denver, CO|The Westin Denver Downtown
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
June 2025
Nuclear Technology
Fusion Science and Technology
May 2025
Latest News
Argonne’s METL gears up to test more sodium fast reactor components
Argonne National Laboratory has successfully swapped out an aging cold trap in the sodium test loop called METL (Mechanisms Engineering Test Loop), the Department of Energy announced April 23. The upgrade is the first of its kind in the United States in more than 30 years, according to the DOE, and will help test components and operations for the sodium-cooled fast reactors being developed now.
Sang Ge, Luo Xuejian, Liang HongWei, Sun Ying, Wu Sheng, Su Yongjun, Tu Mingjing, Luo Wenhua
Fusion Science and Technology | Volume 41 | Number 3 | May 2002 | Pages 758-763
Hydride and Storage | Proceedings of the Sixth International Conference on Tritium Science and Technology Tsukuba, Japan November 12-16, 2001 | doi.org/10.13182/FST02-A22688
Articles are hosted by Taylor and Francis Online.
In this paper, studies have been made concerning the poisoning mechanism. The processes of poisoning of LaNi47Al0.3 alloy are analyzed in detail by means of X-ray photoelectron spectroscopy (XPS), second ion mass spectroscopy (SIMS), Auger-energy spectroscopy (AES) and X-ray diffraction (XRD). The changes of the valence and the concentration distribution of the elements of the alloy LaNi4.7Al0.3 poisoned by CO are studied. The process and the mechanism of CO's poisoning of alloy LaNi47Al0.3 are proposed as follows: CO is absorbed on the surface of alloy, part of which reacts with La forming LaC2 and La2O3, or reacts with Ni forming NiO and C in the surface layer, the rest of the CO is decomposed into C and O, which diffuse into the bulk to react with La, Ni and Al. These results in phase-split reaction in surface layer of the particle, and enrichment of La and impoverishment Ni on the surface have taken place. The poisoning effect decreases with a increase of depth. The diffusion depth of C is within 600 Å in the surface layer, and that of O is within 1000 Å.The oxide film and carbonizing film prevent the H-storage alloys from further absorbing hydrogen, which leads to a deceleration of the H-storage capability. Moreover, The formation of a new phase with poor H-absorption capability is caused by the phase split reactions, which is one of reasons for the decrease of H-absorption property of the H-storage alloys.
