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Full-Text Articles in Nuclear Engineering
Cavitation Of Mercury In A Centrifugal Pump, David Alan Hooper
Cavitation Of Mercury In A Centrifugal Pump, David Alan Hooper
Masters Theses
Cavitation is a significant concern for the reliable operation of a centrifugal pump. Liquid metal flow loops are used in nuclear, chemical, metal forming, and liquid metal dynamo applications. Understanding of the cavitation characteristics of liquid metals is increasingly important to the design and operation of these facilities. One recent field of cavitation research has developed for mercury flow in spallation targets used in neutron sources. To further the understanding of mercury cavitation, a review of the existing literature on water cavitation, liquid metal cavitation, and mercury cavitation is performed. The mechanics of cavitation and the analytical methods applied to …
Artificial Neural Network For Spectrum Unfolding Bonner Sphere Data, Jia Hou
Artificial Neural Network For Spectrum Unfolding Bonner Sphere Data, Jia Hou
Masters Theses
The use of Bonner Sphere Spectrometer (BSS) is a well-established method of measuring the energy distribution of neutron emission sources. The purpose of this research is to apply the Generalized Regression Neural Network (GRNN), a kind of Artificial Neural Network (ANN), to predict the neutron spectrum using the count rate data from a BSS. The BSS system was simulated with the MCNP5 Monte-Carlo code to calculate the response to neutrons of different energies for each combination of thermal neutron detector and polyethylene sphere. One hundred and sixty-three different types of neutron spectra were then investigated. GRNN Training and testing was …
Uncertainty Analysis Of Advanced Fuel Cycles To Control Plutonium Inventories, Thomas Christopher Anderson
Uncertainty Analysis Of Advanced Fuel Cycles To Control Plutonium Inventories, Thomas Christopher Anderson
Masters Theses
This paper assesses the uncertainty associated with the utilization and implementation of advanced fuel cycles to control plutonium inventories. The specific fuel cycles investigated are a partially closed cycle utilizing MOX reactors and completely closed one-tier fuel cycles utilizing fast reactors. Multiple methods for assessing these uncertainties were utilized. A scenario approach that varied the time and number of the implementation of the advanced reactors was used. It was found that the implementation of 3 FR/yr with a CR of 0.5 could reduce the amount of Pu by over 36% in reference to building 3 LWR/yr. In addition to reducing …
Investigations On Hydrocyclones For The Spallation Neutron Source, Lee Henry Hosack
Investigations On Hydrocyclones For The Spallation Neutron Source, Lee Henry Hosack
Masters Theses
The hydrocyclone is commonly used to separate oil from water, and particulates from fluid streams in various process industries. Two-fluid hydrodynamic theory is used here to develop a model for hydrocyclone performance in the application of separation of helium bubbles larger than 30 micron in diameter from liquid mercury at system pressure near 1 bar. The application is related to high power liquid metal target development for proton beams used in spallation neutron sources.