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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.
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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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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.
John F. Geldard, Adolph L. Beyerlein
Nuclear Technology | Volume 85 | Number 2 | May 1989 | Pages 172-186
Technical Paper | Chemical Processing | doi.org/10.13182/NT89-A34239
Articles are hosted by Taylor and Francis Online.
The mathematical basis for a computer code CUSEP (Clemson University Solvent Extraction Program) is described. The code simulates the temporal and steady-state concentration profiles in pulsed column contactors using the Purex process. Advantage is taken of the cellular structure of a pulsed column contactor caused by the presence of sieve plates and the turbulent flow to generate a set of equations that explicitly contain the instantaneous flow of the fluids caused by the pulse frequency and amplitude. The assumption is made that there are volumes in the contactors within which the time-averaged concentrations can be regarded as uniform. The size of these volumes is defined in terms of a parameter whose value is obtained by calibration against experimental data. Longitudinal diffusive remixing is shown to be negligible in comparison to convective remixing caused by the pulsing. Mass transfer between phases can occur at the equilibrium limit or can be allowed to deviate from it. The deviation is accounted for by a mass transfer area that is determined by the average size of droplets in the pulsed column and a mass transfer coefficient that is treated as a second input parameter. The code has been used to generate concentration profiles in several extraction (A-type) and stripping (E-type) contactors and in a partitioning (B-type) contactor. Agreement between calculated and available experimental concentration profiles is good.