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Mathematics & Computation
Division members promote the advancement of mathematical and computational methods for solving problems arising in all disciplines encompassed by the Society. They place particular emphasis on numerical techniques for efficient computer applications to aid in the dissemination, integration, and proper use of computer codes, including preparation of computational benchmark and development of standards for computing practices, and to encourage the development on new computer codes and broaden their use.
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International Conference on Mathematics and Computational Methods Applied to Nuclear Science and Engineering (M&C 2025)
April 27–30, 2025
Denver, CO|The Westin Denver Downtown
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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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Argonne’s METL gears up to test more sodium fast reactor components
Argonne National Laboratory has successfully swapped out an aging cold trap in the sodium test loop called METL (Mechanisms Engineering Test Loop), the Department of Energy announced April 23. The upgrade is the first of its kind in the United States in more than 30 years, according to the DOE, and will help test components and operations for the sodium-cooled fast reactors being developed now.
N. R. CHELLEW, R. K. STEUNENBERG
Nuclear Science and Engineering | Volume 14 | Number 1 | September 1962 | Pages 1-7
Technical Paper | doi.org/10.13182/NSE62-A26192
Articles are hosted by Taylor and Francis Online.
Swelling and rare gas release of irradiated prototype EBR-II fuel pins during heating have been studied with material containing 320 to 830 ppm of these gases (0.2 to 0.6 at. % burnup). Data on both phenomena were obtained at varied heating rates and with stepwise heating to successively higher temperature levels. In each experiment, over 99% of the rare gases was released before the alloy was fully molten at about 1080°C. Within experimental error the behaviors of xenon-133 and krypton-85 were identical. Below 750°C, gas release was slow; above 750°C, the rate increased sharply. The quantity of gas evolved as a function of time at constant temperatures to 850°C appeared to be directly proportional to the time rather than the square root of time as predicted by diffusion theory. Swelling of the alloy showed much the same type of temperature dependence as the release of rare gas. For all heating patterns, pin swelling was most pronounced above 750°C, reaching a maximum diametral increase of about 47% as the pin melted. A brief comparison between the release of rare gas from this alloy and that from other metallic fuels is made. The effects of this phenomenon and associated swelling on the melt refining process envisioned for recovery of fuel from the first core loading of EBR-II are discussed.