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Conference Spotlight
Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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
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.
Friedrich Helm, Georg Henneges
Nuclear Technology | Volume 71 | Number 1 | October 1985 | Pages 68-81
Technical Paper | Fission Reactor | doi.org/10.13182/NT85-A33710
Articles are hosted by Taylor and Francis Online.
In the critical assembly SNEAK 12B, the reactivity effects of material movements occurring in a postulated fast reactor accident were investigated in a test zone composed of PuO2UO2 rod bundles. The experimental program included addition and removal of fuel, addition of steel between the fuel rods, and vertical and horizontal relocation of fuel. The measured reactivity changes could be well reproduced by eigenvalue calculations in SN transport theory, while first-order perturbation transport theory and diffusion theory in most cases yielded substantial deviations.
