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Division Spotlight
Young Members Group
The Young Members Group works to encourage and enable all young professional members to be actively involved in the efforts and endeavors of the Society at all levels (Professional Divisions, ANS Governance, Local Sections, etc.) as they transition from the role of a student to the role of a professional. It sponsors non-technical workshops and meetings that provide professional development and networking opportunities for young professionals, collaborates with other Divisions and Groups in developing technical and non-technical content for topical and national meetings, encourages its members to participate in the activities of the Groups and Divisions that are closely related to their professional interests as well as in their local sections, introduces young members to the rules and governance structure of the Society, and nominates young professionals for awards and leadership opportunities available to members.
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!
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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.
John F. Geldard, Adolph L. Beyerlein, Houn-Lin Chiu
Nuclear Technology | Volume 78 | Number 2 | August 1987 | Pages 151-156
Technical Paper | Chemical Processing | doi.org/10.13182/NT87-A33993
Articles are hosted by Taylor and Francis Online.
The mathematical basis for a computer code PUNE (Plutonium-Uranium-Non-Equilibrium) is described. The code simulates the steady-state concentration profiles of solvent extraction contactors used in the Purex process under conditions where material transfer between phases deviates from the equilibrium limit. The deviation is accounted for by a mass transfer area characteristic of the operating conditions of a contactor, and a mass transfer coefficient for the chemical species of interest. In the limit of infinite mass transfer rate, PUNE gives the same results as other codes that calculate equilibrium profiles. For 1A and IE contactors, the computational times are reduced between two- and fivefold over times required by other codes that generate the steady-state profiles via transient state conditions. For 1B or partitioning contactors, the reduction in time can be more than 20-fold. Since there is no loss of accuracy in these calculations, PUNE represents an important advance in the determination of steady-state profiles, especially for 1B contactors because it is with these that the greatest computational difficulties are encountered.