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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.
Shiang-Huei Jiang
Nuclear Science and Engineering | Volume 75 | Number 1 | July 1980 | Pages 16-29
Technical Paper | doi.org/10.13182/NSE80-1
Articles are hosted by Taylor and Francis Online.
A one-dimensional gamma-ray transport code BIGGI 4T has been used to calculate gamma-ray attenuation in single layer and multiple layers of lead and water slabs from a plane monodirectional source. It has been found that boundary effect of finite medium is appreciable only in water within two mean-free-paths (mfp) of the boundary. Transmission buildup factors for multilayer slabs are not sensitive to the sequence of the alternate layers for the 3-MeV source. The conventional rule of thumb, that when the outermost layer exceeds 2 or 3 mfp, the buildup factor of the outermost material generally recommended, has been shown to be a bad approximation when based on the total number of mean-free-paths along the line of sight through all materials. Energy absorption buildup factor at the interface between layers was investigated in more detail. Transmission buildup factors obtained in the present study have been compared with those calculated by other empirical formulas. The applied range of various empirical formulas has been discussed. It has been found that semiempirical formulas devised by Kalos give data agreeing, in general and on the average, with the present results to within 5%.
