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Division Spotlight
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.
Meeting Spotlight
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
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
ANS designates Armour Research Foundation Reactor as Nuclear Historic Landmark
The American Nuclear Society presented the Illinois Institute of Technology with a plaque last week to officially designate the Armour Research Foundation Reactor a Nuclear Historic Landmark, following the Society’s decision to confer the status onto the reactor in September 2024.
P. Thomas, K. Nester
Nuclear Technology | Volume 68 | Number 3 | March 1985 | Pages 293-310
Technical Paper | Nuclear Safety | doi.org/10.13182/NT85-A33576
Articles are hosted by Taylor and Francis Online.
Experiments were carried out at the Karlsruhe Nuclear Research Center to determine the atmospheric diffusion of pollutants. The influence on atmospheric diffusion by conditions specific to the site was investigated. For this purpose, tritiated water and two different halogenated hydrocarbons are emitted at heights of 60 and 100 m; their local concentration distribution is measured at ground level downwind of the source. The relevant meteorological data are measured at a 200-m-high tower. For evaluation of the measurements the diffusion is assumed to be a steady-state process. A twodimensional Gaussian distribution is used as the theoretical approximation of the concentrations. The dependence of the dispersion parameters σy and σz on the downwind distance is described by a power function. A least-squares fit is applied to calculate the horizontal and vertical dispersion parameters and the normalized diffusion factor from the measured wind velocity, emission rate, and concentration distribution. The errors in the calculated parameters are also determined. The dispersion parameters evaluated are assigned to stability classes by the measured standard deviation of the vertical wind direction.
