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Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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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 big day for nuclear at the Pennsylvania Energy and Innovation Summit
Representatives across all levels of Pennsylvania government convened at Carnegie Mellon University on July 15 with investors and key leaders in the energy community at the behest of Sen. Dave McCormick (R., Pa.).
Daniel B. Fromowitz, Gary B. Zeigler
Nuclear Science and Engineering | Volume 182 | Number 2 | February 2016 | Pages 166-180
Technical Paper | doi.org/10.13182/NSE14-49
Articles are hosted by Taylor and Francis Online.
Using two different methods, angular quadrature sets are developed with greater than about 1000 angles per octant to reduce ray effects in three-dimensional (3-D), discrete ordinates radiation transport calculations with large air or void regions. Quadrature sets from both methods are evaluated in two distinct 3-D models sensitive to quadrature details and are shown to behave reasonably well. The first method is a previously described method that is examined here in 3-D. The second method produces quadrature sets that have quadrature directions approximately evenly spaced over the entire surface of the unit sphere.