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Filtering by: Committee Member Krane, Kenneth S. Remove constraint Committee Member: Krane, Kenneth S. Degree Name Doctor of Philosophy (Ph.D.) Remove constraint Degree Name: Doctor of Philosophy (Ph.D.)

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  • Evaluation of partial discharge in inverter driven medium voltage propulsion coils

    Creator:
    Ramme, André
    Abstract:
    Advancements in power electronics to higher power levels and faster switching times allow new machine and systems designs, but also create higher stresses on electric machinery insulation. High performance, pulse-width modulated (PWM) inverters are now available for medium voltage drive systems, and are being considered by the U.S. Navy as...
    Resource Type:
    Dissertation
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    . Kenneth S. Krane. Appreciation is also extended to my peers of the energy systems group who made the time

  • Diffusion Accelerated Implicit Monte Carlo via Nonlinear Elimination for Thermal Radiative Transfer

    Creator:
    Lam, Adam Q.
    Abstract:
    In this dissertation, we derive and implement a new transport-diffusion hybrid algorithm for solving thermal radiative transfer (TRT) problems. Using the method of nonlinear elimination (NLEM), the TRT system of equations can be written in terms of a transport equation with the absence of scattering and a diffusion equation. The...
    Resource Type:
    Dissertation
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    : Todd S. Palmer In this dissertation, we derive and implement a new transport-diffusion hybrid al

  • Development of a Radioxenon Detection System using Stilbene and Strontium Iodide

    Creator:
    Gadey, Harish R.
    Abstract:
    The Comprehensive Nuclear-Test-Ban Treaty (CTBT) prohibits the testing of nuclear weapons on the face of the earth. The detection of atmospheric radioxenon (131mXe, 133m/133Xe, and 135Xe) plays an important role in the identification of sub-surface clandestine nuclear weapon explosions. Since the radioxenon identified above decay via two radiation in coincidence,...
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    Dissertation
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    . I would also like to thank my committee members Dr. Yang, Dr. Palmer, Dr. Krane, and Dr. Sinha

  • A Direction-Sensitive Radiation Detector for Low-Altitude, UAV-based Radiological Source Search

    Creator:
    Becker, Eric M. (Eric Matthew)
    Abstract:
    Many devices and methods for radiological searches are currently being developed, including scanning using simple detectors, mapping using large-volume detectors, and Compton imaging using 3-D position sensitive detectors. However, these devices are typically expensive and the methods used require long periods of time to generate a direction or location. The...
    Resource Type:
    Dissertation
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    angle, θs, and the reference angle of panel 15, φ1 . . . . . . . . . . . . . . 79 3.33 Illustration

  • Coarse mesh and one-cell block inversion based diffusion synthetic acceleration

    Creator:
    Kim, Kang-Seog
    Abstract:
    DSA (Diffusion Synthetic Acceleration) has been developed to accelerate the SN transport iteration. We have developed solution techniques for the diffusion equations of FLBLD (Fully Lumped Bilinear Discontinuous), SCB (Simple Corner Balance) and UCB (Upstream Corner Balance) modified 4-step DSA in x-y geometry. Our first multi-level method includes a block...
    Resource Type:
    Dissertation
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    . Steve E. Binney, Jr., Dr. Jack F. Higginbotham and Dr. Kenneth S. Krane. I would appreciate the

  • Measurement of 239Pu, 237Np, and 238U Fission Product γ Rays

    Creator:
    Tamashiro, Aaron S.
    Abstract:
    Fission product yields (FPYs) are used for a wide range of applications including nuclear fission theory, nuclear reactor design, reactor antineutrino anomaly, stellar nucleosynthesis, and nuclear forensics. These applications rely on FPYs that were last evaluated in 1993, which included measurements from all over the world up until 1993. In...
    Resource Type:
    Dissertation
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    . Kenneth S. Krane, Dr. Steven R. Reese, Dr. Todd S. Palmer, and Dr. Walter D. Loveland. Thank you to Dr

  • Integrated Spatial and Temporal Stochastic Model in Radiation Biology : Design, Implementation, and Application

    Creator:
    Liu, Ruirui
    Abstract:
    Mathematical modeling plays a pivotal role in understanding the mechanism of radiation-induced cellular effects, and also in quantifying the radiation risk to the cell. However, there are still compelling challenges facing the conventional modeling in radiobiology, such as lacking a generalized theory structure of quantifying target effect and non-target effect...
    Resource Type:
    Dissertation
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    . David Hamby, Dr. Todd Palmer, Dr. Susan Carozza, and Dr. Kenneth Krane. They offered guidance and help

  • Optical Spectroscopy of Laser-Produced Plasmas via Fiber Optics for Material Characterization

    Creator:
    Zhao, Yichen
    Abstract:
    Characterization of uranium isotope compositions is of great interest in many nuclear sub-areas for safeguards purposes. Reprocessing facilities utilizing pyroprocessing raised an issue of uranium isotope monitoring due to the difficulty to apply traditional approaches under extreme environments. An rapid and remote method to characterize uranium isotope compositions for such...
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    Dissertation
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    conferences. I truly appreciate those opportunities. I want to thank Dr. Sivanandan S. Harilal from PNNL for

  • Investigation of f-Element Extraction and Ligand Association in the ALSEP Extraction System for Used Nuclear Fuel Reprocessing

    Creator:
    Holfeltz, Vanessa E.
    Abstract:
    Effective separation of lanthanides (Ln) from the minor actinides (MA) is a crucial technical challenge to closing the nuclear fuel cycle. This separation is a necessary prerequisite to transmute long-lived isotopes of Am and Cm, which will allow a reduction of the repository volume, thermal load, and radiological toxicity of...
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    Dissertation
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    core of a commercial light water reactor (LWR) is considered waste. The current strategy of the U. S

  • Flow Dynamics and Condensation of Film Flows in Small Modular Reactors

    Creator:
    Lee, Dongyoung
    Abstract:
    There is renewed interest in the reliability and safety of nuclear power plants following the Fukushima Daiichi nuclear accident followed by 8.9 magnitude earthquake and Tsunami with the height of 15 m on March 11, 2011. Small Modular Reactors (SMRs) have been developed to improve safety systems by utilizing passive...
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    Dissertation
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    appreciation to Dr. Andrew Klein, Dr. Brian Woods, Dr. Deborah Pence, Dr. Kenneth Krane and Dr. Vinod