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Division Spotlight
Materials Science & Technology
The objectives of MSTD are: promote the advancement of materials science in Nuclear Science Technology; support the multidisciplines which constitute it; encourage research by providing a forum for the presentation, exchange, and documentation of relevant information; promote the interaction and communication among its members; and recognize and reward its members for significant contributions to the field of materials science in nuclear technology.
Meeting Spotlight
Conference on Nuclear Training and Education: A Biennial International Forum (CONTE 2025)
February 3–6, 2025
Amelia Island, FL|Omni Amelia Island Resort
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
Senate committee hears from energy secretary nominee Chris Wright
Wright
Chris Wright, president-elect Trump’s pick to lead the U.S. Department of Energy, spent hours today fielding questions from members of the U.S. Senate’s committee on Energy and Natural Resources.
During the hearing, Wright—who’s spent most of his career in fossil fuels—made comments in support of nuclear energy and efforts to expand domestic generation in the near future. Asked what actions he would take as energy secretary to improve the development and deployment of SMRs, Wright said: “It’s a big challenge, and I’m new to government, so I can’t list off the five levers I can pull. But (I’ve been in discussions) about how to make it easier to research, to invest, to build things. The DOE has land at some of its facilities that can be helpful in this regard.”
Ronald Mattis, Alireza Haghighat
Nuclear Science and Engineering | Volume 111 | Number 2 | June 1992 | Pages 180-196
Technical Paper | doi.org/10.13182/NSE92-A23932
Articles are hosted by Taylor and Francis Online.
Several vector and parallel processing algorithms for the inherently recursive Sn method are developed for two-dimensional curvilinear geometries. The iterative sweeps through the spatial and directional meshes are decomposed into various independent subdomains suitable for multiprocessing on shared memory architectures. Both spatial decomposition (using both axial and radial groups) and angular decomposition (using directional groups) are used. The new algorithms are implemented on the six-processor Cornell National Supercomputing Facility IBM 3090/600J computer using the IBM parallel Fortran compiler. The algorithm behaviors are investigated using a series of r-z cylindrical geometry fixed-source problems. In addition, to verify the algorithm performance for realistic problems, a two-group, r-θ geometry, pressurized water reactor (PWR) source calculation is performed. Total speedups as high as 5.86 are observed for the PWR model compared with the one-processor solution. The suitability of these algorithms for highly parallel architectures is also discussed.