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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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ANS Student Conference 2025
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Albuquerque, NM|The University of New Mexico
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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.”
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.