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Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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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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ANS joins others in seeking to discuss SNF/HLW impasse
The American Nuclear Society joined seven other organizations to send a letter to Energy Secretary Christopher Wright on July 8, asking to meet with him to discuss “the restoration of a highly functioning program to meet DOE’s legal responsibility to manage and dispose of the nation’s commercial and legacy defense spent nuclear fuel (SNF) and high-level radioactive waste (HLW).”
Ronald F. Tuttle, Sudarshan K. Loyalka
Nuclear Technology | Volume 69 | Number 3 | June 1985 | Pages 319-326
Technical Paper | Nuclear Safety | doi.org/10.13182/NT85-A33614
Articles are hosted by Taylor and Francis Online.
Nonspherical aerosols can be encountered in postulated severe core damage accidents in nuclear reactors. Aerosol behavior equations are thus modified to account for the departure from spherical shapes by the introduction of a range of “shape factors,which are defined in terms of a specified characteristic dimension or property of the particles. These factors are then introduced into the aerosol behavior equation by modifying the normalized collision kernel. When gravitational effects alone are considered, the kernel is reduced to the gravitational collision kernel, and shape factors for individual particles are typically defined in terms of the dynamic shape factor, which is the ratio of the Stokes settling velocity to the aerodynamic settling velocity, and the collision shape factor (the ratio of the collision diameter to the volume equivalent diameter). Due to the inconsistencies and ambiguities of current usage, separate effects information on the collision shape factor is unavailable. A new shape factor, β, is introduced to clarify the definitions and relationships between the collision efficiencies of nonspherical and “equivalent” spherical particles. The shape factor, β, can be obtained from mechanistic considerations.