ANS is committed to advancing, fostering, and promoting the development and application of nuclear sciences and technologies to benefit society.
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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
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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August 2025
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Latest News
Report: New York state adding 1 GW of nuclear to fleet
New York Gov. Kathy Hochul has instructed the state’s public electric utility to add at least 1 gigawatt of new nuclear by building a large-scale nuclear plant or a collection of smaller modular reactors, according to the Wall Street Journal.
Jason B. Meng, Francesco Deleo (TerraPower)
Proceedings | 2018 International Congress on Advances in Nuclear Power Plants (ICAPP 2018) | Charlotte, NC, April 8-11, 2018 | Pages 51-59
The TerraPower-developed mechanical analysis code OXBOW is used to evaluate the mechanical performance of Traveling Wave Reactor core assemblies. Benchmarking work was performed using OXBOW to compare displacement and contact load results against a variety of mechanical analysis codes from the International Working Group on Fast Reactors (IWGFR) for a set of well-defined assembly conditions. Significant differences in results were found in the benchmark problem modeling a thermally bowing row of assemblies in a limited free bow core restraint configuration. This is due to a bridging effect which occurs due to differences in contact modeling methodology. Additionally, significant displacement differences in results were found in the benchmark problem modeling duct dilation under internal pressure, temperature, and irradiation. These differences are due to the fact that OXBOW dilation models account for both stress relaxation and geometric nonlinearities. Differences in results between OXBOW and the IWGFR benchmark participants are attributed to higher fidelity models generated using OXBOW.