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Nuclear Criticality Safety
NCSD provides communication among nuclear criticality safety professionals through the development of standards, the evolution of training methods and materials, the presentation of technical data and procedures, and the creation of specialty publications. In these ways, the division furthers the exchange of technical information on nuclear criticality safety with the ultimate goal of promoting the safe handling of fissionable materials outside reactors.
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Utility Working Conference and Vendor Technology Expo (UWC 2024)
August 4–7, 2024
Marco Island, FL|JW Marriott Marco Island
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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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BWXT will scout potential TRISO fuel production sites in Wyoming
BWX Technologies Inc. announced today that its Advanced Technologies subsidiary has signed a cooperation agreement with the state of Wyoming to evaluate locations and requirements for siting a potential new TRISO nuclear fuel fabrication facility in the state.
N. J. McCormick
Nuclear Technology | Volume 24 | Number 2 | November 1974 | Pages 156-167
Technical Paper | Reactor | doi.org/10.13182/NT74-2
Articles are hosted by Taylor and Francis Online.
Gas tagging consists of the addition to nuclear reactor fuel pins of small amounts of gas having a unique isotopic composition for each assembly; when an assembly fails during subsequent irradiation, the tag gas which is released along with the fission gas, makes it possible to locate the defective assembly by a mass spectrometric analysis of the reactor cover gas. Location of the ratios of the tag gas isotopic concentrations on curved surfaces in a three-dimensional tag-ratio space enables the three ratios corresponding to failure of a single fuel assembly to be distinguished from those formed from any combination of two or more failed assemblies. Three prototypic designs have been analyzed for the fast flux test facility (FFTF) reactor, and some alternative design possibilities have been suggested. Based upon these results, current FFTF gas tag designs incorporate to a certain extent the principle of curved surfaces.