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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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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.
G. Schulze, H. Würz
Nuclear Technology | Volume 35 | Number 3 | October 1977 | Pages 663-670
Technical Paper | Technique | doi.org/10.13182/NT77-A31875
Articles are hosted by Taylor and Francis Online.
A determination of fissile material concentration in high-level radioactive solutions can be accomplished by measuring the source multiplication of an external neutron source. Computer calculations and laboratory experiments were used to demonstrate the applicability of the method to fissile material solutions containing unknown quantities of homogeneous neutron poison materials. A relation between the fissile material concentration Cfiss and the quantities thermal and epithermal leakage neutron fluxes measured with 235U fission chambers is derived. The accuracy obtained using a 252Cf neutron source of source strength 5 × 108 n/s, a measuring time interval of 20 s, and assuming Cfiss to be at least twice the minimum detectable concentration is better than 30%. This is adequate for application of the method for process control of pulsed columns in reprocessing plants.