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Conference Spotlight
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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Inkjet droplets of radioactive material enable quick, precise testing at NIST
Researchers at the National Institute of Standards and Technology have developed a technique called cryogenic decay energy spectrometry capable of detecting single radioactive decay events from tiny material samples and simultaneously identifying the atoms involved. In time, the technology could replace characterization tasks that have taken months and could support rapid, accurate radiopharmaceutical development and used nuclear fuel recycling, according to an article published on July 8 by NIST.
J. H. McFadden, M. P. Paulsen, G. C. Gose
Nuclear Technology | Volume 54 | Number 3 | September 1981 | Pages 287-297
First International Retran Meeting | Heat Transfer and Fluid Flow | doi.org/10.13182/NT81-A32774
Articles are hosted by Taylor and Francis Online.
A time-dependent equation for the slip velocity in a two-phase flow condition has been incorporated into the RETRAN-02 computer code. This model addition was undertaken to remove a limitation in RETRAN-01 associated with the homogeneous equilibrium mixture model The dynamic slip equation was derived from a set of two-fluid conservation equations. The slip model and the flow-regime-dependent constitutive equations are used in the RETRAN steady-state initialization solution as well as for transient analyses. Comparisons of RETRAN calculations with steady-state and transient data indicate the slip model results in a better analysis of two-phase flow behavior than does the homogeneous equilibrium mixture model
