ANS is committed to advancing, fostering, and promoting the development and application of nuclear sciences and technologies to benefit society.
Explore the many uses for nuclear science and its impact on energy, the environment, healthcare, food, and more.
Division Spotlight
Robotics & Remote Systems
The Mission of the Robotics and Remote Systems Division is to promote the development and application of immersive simulation, robotics, and remote systems for hazardous environments for the purpose of reducing hazardous exposure to individuals, reducing environmental hazards and reducing the cost of performing work.
Meeting Spotlight
Utility Working Conference and Vendor Technology Expo (UWC 2024)
August 4–7, 2024
Marco Island, FL|JW Marriott Marco Island
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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Nuclear Science and Engineering
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Fusion Science and Technology
Latest News
Taking shape: Fusion energy ecosystems built with public-private partnerships
It’s possible to describe fusion in simple terms: heat and squeeze small atoms to get abundant clean energy. But there’s nothing simple about getting fusion ready for the grid.
Private developers, national lab and university researchers, suppliers, and end users working toward that goal are developing a range of complex technologies to reach fusion temperatures and pressures, confounded by science and technology gaps linked to plasma behavior; materials, diagnostics, and electronics for extreme environments; fuel cycle sustainability; and economics.
Jean Ragusa, Richard Sanchez, Simone Santandrea
Nuclear Science and Engineering | Volume 157 | Number 3 | November 2007 | Pages 299-315
Technical Paper | doi.org/10.13182/NSE07-A2729
Articles are hosted by Taylor and Francis Online.
This paper treats the problem of determining equivalent homogenized cross sections that preserve a set of prescribed reference albedos obtained from a heterogeneous reflector. This equivalence problem is treated as an optimization problem where the minimum of a functional is sought. Duality is used for a direct estimation of the derivatives needed in the iterative calculation of the optimal homogenized cross sections. We analyze both diffusion and transport as low-order operators for the equivalence and propose several choices for constraining the unknown cross sections. Numerical results illustrate the new approach for one-dimensional PN core calculations.