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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.
Joseph L. Bottini, Sabrina Hammouti, David Ruzic, Caleb S. Brooks (Univ of Illinois)
Proceedings | Advances in Thermal Hydraulics 2018 | Orlando, FL, November 11-15, 2018 | Pages 440-448
Boiling heat transfer is an effective method for transferring heat from system components, enabling high heat transfer rates from minimal surface superheats. While it is effective, two-phase heat transfer offers added complexities to single-phase heat transfer caused by the addition of deformable interfaces, dissimilar fluid properties, and phase transition. The critical heat flux (CHF) marks the upper limit of safe operation for many boiling heat transfer systems, and its prediction is essential to ensure safe operation. While much effort has been devoted to studying boiling heat transfer and CHF, the characteristics of the surface, such as wettability and roughness, influence the boiling heat transfer, but are not well understood. Heat transfer surfaces of varying wettability and roughness have been prepared, characterized, and subjected to flow experiments up to CHF to study the role the surface properties have in flow boiling heat transfer. The surfaces were prepared using a high-power laser to texture the surface altering the wettability and roughness. Increasing the roughness and decreasing the wettability are found to have competing effects on both the boiling curves and the CHF points. The onset of nucleate boiling (ONB) points are delayed for the lesswetting surfaces, and the CHF value is lower. An increase in roughness for the textured surface causes earlier ONB and increases CHF, but the CHF values are lower than for the original, polished surface. The roughness and wettability are demonstrated to be influential properties on both the boiling heat transfer and the CHF point, and are not well captured by the existing CHF models.