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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
Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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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A look inside NIST’s work to optimize cancer treatment and radiation dosimetry
In an article just published by the Taking Measure blog of the National Institute of Standards and Technology, Stephen Russek—who leads the Imaging Physics Project in the Magnetic Imaging Group at NIST and codirects the MRI Biomarker Measurement Service—describes his team’s work using phantom stand-ins for human tissue.
R. Le Tellier, A. Hébert
Nuclear Science and Engineering | Volume 156 | Number 2 | June 2007 | Pages 121-138
Technical Paper | doi.org/10.13182/NSE07-A2691
Articles are hosted by Taylor and Francis Online.
A detailed derivation of the algebraic collapsing acceleration (ACA), a synthetic acceleration of the characteristics method, is presented. An improvement of the synthetic hypothesis is proposed, and the corrective system is derived for general boundary conditions. Both Fourier and direct spectral analyses of the accelerated iterations for a one-dimensional slab geometry are given. The solving strategy for the corrective system along with implementation details about the method of characteristics is discussed. Numerical results for a one-group, two-dimensional benchmark are provided to illustrate the basic synthetic hypothesis and the enhancement of its robustness with the proposed two-step collapsing hypothesis. The practical performance of ACA is illustrated on a pressurized water reactor-type assembly in the context of multigroup eigenvalue calculations.
