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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.
M. Podowski
Nuclear Science and Engineering | Volume 72 | Number 2 | November 1979 | Pages 256-261
Technical Paper | doi.org/10.13182/NSE79-A19470
Articles are hosted by Taylor and Francis Online.
The question of general asymptotic stability is considered for N-order coupled-core reactors neglecting neutron coupling time lag, but with general nonlinear reactivity functionals. Stability criteria, applicable to models with reactivity coupling effects, are established. As an illustration of the general results, the linear reactivity feedback model is investigated. In particular, a two-node model with temperature coupling effects is discussed in more detail.
