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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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Latest News
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.
J. Chin, T. Ohkawa
Nuclear Technology | Volume 32 | Number 2 | February 1977 | Pages 115-124
Technical Paper | Reactor | doi.org/10.13182/NT77-A31717
Articles are hosted by Taylor and Francis Online.
The feasibility of in situ regeneration of a deuterium-tritium (D-T) fusion reactor first wall is explored. Chemical and physical vapor deposition processes are considered for applying low-Z materials and metals. Trial deposits of carbon, SiC, Si3N4, and (Si, Al)N were prepared by one or both of these fabrication techniques. Material properties such as chemical composition, impurity concentration, morphology, and crystal structure thought to be important in first wall performance were found to be controllable by the vapor deposition process conditions. Chemical composition of the gas mixtures, substrate temperature, and deposition pressures were parameters that influenced material properties in all vapor deposition processes. These parameters may be expected to be controllable in a D-T fusion reactor chamber. Temperature can be adjusted within the plasma zone by a glow discharge. The chemical composition of the reactant gases can be controllable by an auxiliary gas supply and exhaust systems. Gas pressure control within the reactor is a required feature of any fusion reactor system. In situ regeneration of the fusion first wall by vapor deposition processes thus appears feasible.