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Division Spotlight
Nuclear Nonproliferation Policy
The mission of the Nuclear Nonproliferation Policy Division (NNPD) is to promote the peaceful use of nuclear technology while simultaneously preventing the diversion and misuse of nuclear material and technology through appropriate safeguards and security, and promotion of nuclear nonproliferation policies. To achieve this mission, the objectives of the NNPD are to: Promote policy that discourages the proliferation of nuclear technology and material to inappropriate entities. Provide information to ANS members, the technical community at large, opinion leaders, and decision makers to improve their understanding of nuclear nonproliferation issues. Become a recognized technical resource on nuclear nonproliferation, safeguards, and security issues. Serve as the integration and coordination body for nuclear nonproliferation activities for the ANS. Work cooperatively with other ANS divisions to achieve these objective nonproliferation policies.
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!
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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.
Hans-Peter Meurer, Gunter K. H. Gnirss, Wolfgang Mergler, Gerhard Raule, Hans Schuster, Georg Ullrich
Nuclear Technology | Volume 66 | Number 2 | August 1984 | Pages 315-323
C.3. Fatigue Property | Status of Metallic Materials Development for Application in Advanced High-Temperature Gas-Cooled Reactor / Material | doi.org/10.13182/NT84-A33435
Articles are hosted by Taylor and Francis Online.
For the development of a high-temperature gas-cooled reactor that is to be operated at temperatures up to 950°C, the low-cycle fatigue (LCF) as well as the high-cycle fatigue (HCF) behavior of several high-temperature alloys have been evaluated. The tests, performed between room temperature and 950°C, include the influence of the environment, hold times, and strain rate in the case of LCF behavior and of mean stresses in the case of HCF behavior. At high strain ranges, alloys with a high ductility like Incoloy-800H appear to be superior, whereas at low strain ranges and under HCF conditions, high-strength alloys like Inconel-617 and Nimonic-86 show a better fatigue resistance. Hold times decrease LCF resistance, especially at low strain ranges, which can be explained by the large stress relaxation. The better LCF resistance in impure helium compared to tests in air was correlated to differences in the deformation and crack initiation mechanisms. At high temperatures, strain rate plays an important role for the stress response under LCF loading. The HCF behavior was found to be very sensitive to superimposed mean stresses because of the considerable creep strain induced.
