Index Catalog // ScholarsArchive@OSU

Assessing the Quality of Three Dimensional Simplified Spherical Harmonic (SPN) Radiation Transport Solutions to Source Detector Problems

Creator:: Patel, Japan K.
Abstract:: The research objective is to assess the performance of the SPN transport method, with a traditional finite volume spatial discretization in Cartesian geometry, on source detector problems relevant to urban detonation of an improvised nuclear device. In particular, we observe the character of the solution as a function of the...
Resource Type:: Honors College Thesis
Full Text:: Spherical Harmonic (SPN) Radiation Transport Solutions to Source Detector Problems by Japan K. Patel

Solar disinfection of drinking water : Effectiveness in peri-urban households in Siddhipur Village, Kathmandu Valley, Nepal

Creator:: Rainey, Rochelle C.
Abstract:: The study examined pH, turbidity, and fecal contamination of drinking water from household water storage containers, wells and taps, and the Godawari River, and tested the effectiveness of solar disinfection (SODIS) in reducing levels of fecal contamination from household containers. Second, the study investigated the relationship between use of SODIS...
Resource Type:: Dissertation
Full Text:: . Nepal. Abstract approved: Anna K. Harding The study examined pH, turbidity, and fecal contamination

A two-group study on the gadolinium particle depletion in light water reactor fuel rods

Creator:: Lee, Chungchan
Abstract:: The effect of gadolinia particles on the assembly criticality of a light water reactor was investigated using two 2-group models. The particle effect was calculated by comparing the criticalities of two fuel assemblies, each containing one gadolinia-poisoned rod. For purposes of comparison, both rods contained an equal quantity of gadolinia,...
Resource Type:: Dissertation
Full Text:: peak of Ak (difference between k of the particle rod assembly and k of the uniform rod assembly). The

Solution of the 2D quasi-diffusion low-order equations using a coupled nodal/finite volume discretization in Cartesian and hexagonal geometry

Creator:: Nes, Razvan
Abstract:: An important improvement in the area of reactor core neutronic modeling is the development and use of the methods based on "quasi-diffusion" (QD) low-order equations. This family of methods takes into account the transport exactly using "functionals" computed by solving transport equations, and is amenable to solution with a variety...
Resource Type:: Dissertation
Full Text:: equations and implement it into a code that will perform flux and k-eigenvalue calculations in Cartesian

Analysis of iteration schemes for deterministic transport in binary Markovian mixtures

Creator:: Ching, Brenton S.
Abstract:: The Adams-Larsen-Pomraning coupled transport model has been used to describe neutral particle transport in binary stochastic mixtures. Here, the mixing statistics are considered to be homogeneous Markovian processes. While the model is robust, the convergence behavior and efficiency of this coupled model have not been addressed. Countless iterative methods could...
Resource Type:: Masters Thesis
Full Text:: . Andrew Klein (Nuclear Engineering), Dr. Deborah Pence (Mechanical Engineering), and Dr. Charles Brunner

Scaling study of the depressurized conduction cooldown event in the high temperature test facility using RELAP5-3D/ATHENA

Creator:: Aldridge, Robert J.
Abstract:: In 2008, the Department of Energy (DOE) and Nuclear Regulatory Commission (NCR) decided that the Next Generation Nuclear Plant (NGNP) would be the Very High Temperature Reactor (VHTR). In support of the licensing and validation effort of the VHTR, Oregon State University was tasked with designing, building, and operating a...
Resource Type:: Masters Thesis
Full Text:: like to acknowledge Dr. Andrew Klein, who was able to take me on as a research assistant during the

The Development of a Hybrid Particle-in-Cell Simulation Code in C++ for the Modeling of the SPT-70 Hall Thruster

Creator:: Myers, Conner J.
Abstract:: In order to support the growing satellite propulsion industry, a hybrid Particle-In-Cell (PIC) simulation with fluid treatment of electrons and neutral particles was developed to model the SPT-70 Hall thruster. The 2D, C++ code assumes azimuthal symmetry and a uniform magnetic field in the radial direction with the simulation domain...
Resource Type:: Masters Thesis
Full Text:: else. I would also like to thank my committee members, Dr. Andrew Klein, Dr. Wade Marcum, and Dr

Advanced Deterministic Phonon Transport Techniques for Predicting Spectral Thermal Conductivity in Homogeneous and Heterogeneous Media

Creator:: Harter, Jackson R.
Abstract:: We present a deterministic spectral method to predict equilibrium temperature distributions, heat flux, and thermal conductivity in homogeneous and heterogeneous media. We solve the Boltzmann transport equation in a second order spatial, self-adjoint angular flux formulation. We implemented this method into the radiation transport code Rattlesnake, built using the MOOSE...
Resource Type:: Dissertation
Full Text:: best at reaching out. Matt T, Nick S, Will C, Josh V, Jeff K, Don B, Michelle C, George J, Denise G

Feed-and-bleed transient analysis of OSU APEX facility using the modern Code Scaling, Applicability, and Uncertainty method

Creator:: Hallee, Brian Todd
Abstract:: The nuclear industry has long relied upon bounding parametric analyses in predicting the safety margins of reactor designs undergoing design-basis accidents. These methods have been known to return highly-conservative results, limiting the operating conditions of the reactor. The Best-Estimate Plus Uncertainty (BEPU) method using a modernized version of the Code-Scaling,...
Resource Type:: Masters Thesis
Full Text:: workforce. The valuable feedback garnered from my thesis committee, including Dr. Andrew Klein, Dr. Kent

RELAP5-3D modeling of ADS blowdown of MASLWR facility

Creator:: Bowser, Christopher Jordan
Abstract:: Oregon State University has hosted an International Atomic Energy Agency (IAEA) International Collaborative Standard Problem (ICSP) through testing conducted on the Multi-Application Small Light Water (MASLWR) facility. The MASLWR facility features a full-time natural circulation loop in the primary vessel and a unique pressure suppression device for accident scenarios. Automatic...
Resource Type:: Masters Thesis
Full Text:: and N sampled values yields F̃ (fn) = ∫ ∞ ∞ F (t)e2πifntdt ≈ N−1∑ k=0 Fke 2πifntkτ = τ N−1∑ k=0

A "mildly inconsistent" method for accelerating upstream corner balance transport

Creator:: Gulick, John C.
Abstract:: A new method for accelerating the Upstream Corner Balance (UCB) discretization of the equation of transfer is introduced. The inconsistent acceleration equations for the UCB discretization are derived by applying the "Modified 4-Step" diffusion synthetic acceleration technique not to the UCB discretization, but instead to the simple corner balance (SCB)...
Resource Type:: Masters Thesis
Full Text:: would like to thank the members of my committee at Oregon State University: Dr. Andrew Klein (Nuclear

Microstructural Characterization of Porosity in U-Mo Low Enriched Uranium Plate Fuel

Creator:: Westman, Bjorn E.
Abstract:: New low enriched uranium (LEU) fuels are being developed for replacement of high enriched uranium (HEU) fuels in high power research reactors. U-Mo LEU plate fuels have been identified as a candidate for replacement of current HEU fuels. However, U-Mo fuels tend to exhibit accelerated swelling typically at fission densities...
Resource Type:: Masters Thesis

Development of a Strain Gage Program for the Measurement of Strain on Prototypic, Plate-type, High Performance Research Reactor Fuels under Flow Testing

Creator:: Weiss, Aaron W.
Abstract:: A large, multi-year experimental program has been conducted to develop a strain gaging program for application to the flow testing of prototypic, plate-type fuel for high performance research reactors. This test program has resulted in the selection of appropriate strain gage construction, adhesives, and protective coatings to allow the acquisition...
Resource Type:: Masters Thesis
Full Text:: to thank the members of my committee for their time: Drs. Brian Woods, Andrew Klein, Daniel LaBrier

Application of the gamma pathway exemption rule for naturally occurring radioactive materials in industrial waste using ISOSHLD-II

Creator:: Bahmaid, Mohammad A.
Resource Type:: Masters Thesis
Full Text:: studies. A special thanks is extended to the members of my committee, Dr. Andrew Klein, Dr. Albert

Utilization for a triple-layer phoswich detector for beta spectral stripping

Creator:: Alkhudhiri, Bandar
Abstract:: To quantify the relative activity contributions of beta emitters in mixed emission source spectra, the triple-layer phoswich detector was modeled to generate beta energy absorption spectra from mixed beta sources. These mixed sources include four pure beta emitters (C-14, Tc-99, Sr-90, and Y-90). Monte Carlo N-Particle (MCNP) computer code was...
Resource Type:: Masters Thesis

Balanced codes

Creator:: Al-Bassam, Sulaiman
Abstract:: Balanced codes, in which each codeword contains equally many 1's and 0's, are useful in such applications as in optical transmission and optical recording. When balanced codes are used, the same number of 1's and 0's pass through the channel after the transmission of every word, so the channel is...
Resource Type:: Dissertation
Full Text:: him for that and for his guidance and support for many years. I would like to thank Dr. Andrew Klein

An on-line advanced plant simulator (OLAPS)

Creator:: Samuels, Jeffery W.
Abstract:: A PC based on-line advanced plant simulator (OLAPS) for high quality simulations of Portland General Electric's Trojan Nuclear Facility is presented. OLAPS is designed to simulate the thermal-hydraulics of the primary system including core, steam generators, pumps, piping and pressurizer. The simulations are based on a five equation model that...
Resource Type:: Dissertation
Full Text:: of Nuclear Engineering, Dr. Andrew Klein, Dr. Milton Larson and Dr. Roman Schmitt, for their support

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
Full Text:: remembered as a great teacher always. I am also very thankful to my committee, Dr. Andrew C. Klein, Dr

Microstructure of radiation damage in the uranium film and its backing materials irradiated with 136 MeV 136Xe+26, Microstructure of radiation damage in the uranium film and its backing materials irradiated with 136 MeV ¹³⁶Xe⁺²⁶

Creator:: Sadi, Supriyadi
Abstract:: Microstructure changes in uranium and uranium/metal alloys due to radiation damage are of great interest in nuclear science and engineering. Titanium has attracted attention because of its similarity to Zr. It has been proposed for use in the second generation of fusion reactors due to its resistance to radiation-induced swelling....
Resource Type:: Dissertation
Full Text:: facilities during this thesis project. I would like to thank Dr. Andrew C. Klein and Dr. David M. Hamby for

Marine Low Clouds : Radiation, Turbulence, and Forecasting

Creator:: Verlinden, Kathryn L.
Abstract:: High-resolution ship-based observations of a nearly uniform stratocumulus deck in the southeast Pacific during 17 days of the 2008 VOCALS regional experiment elucidate radiation and turbulence in the marine boundary layer (MBL). A new method for prescribing observations-based cloud properties to the Rapid Radiative Transfer Model is presented and applied...
Resource Type:: Dissertation

Development of a binary mixture gas composition instrument for use in a confined high temperature environment

Creator:: Cadell, Seth R.
Abstract:: With recent advancements in material science, industrial operations are being conducted at higher and higher temperatures. This is apparent in the nuclear industry where a division of the field is working to develop the High Temperature Gas Reactor and the Very High Temperature Gas Reactor concurrently. Both of these facilities...
Resource Type:: Dissertation

The effects of radiolysis and hydrolysis on the stability of extraction systems for minor actinides

Creator:: Wade, Emily C.
Abstract:: Industrial reprocessing of irradiated nuclear fuel (INF) is one of the most complex procedures performed on a large scale; the process is intricate due to the mix of radionuclides present in INF. As a global trend for nuclear power and reprocessing continues, research is geared toward optimizing the extraction of...
Resource Type:: Masters Thesis

Radiation Shielding for Space Nuclear Propulsion

Creator:: Caffrey, Jarvis
Abstract:: Nuclear thermal propulsion (NTP) is a viable technology for near-term interplanetary exploration. Of the candidate mission architectures that are currently available for a crewed Mars mission, NTP permits the greatest flexibility in launch window selection and provides the shortest possible trip time, thereby reducing risks associated with cosmic ray exposure,...
Resource Type:: Dissertation

Monte Carlo model of a capture gamma ray analyzer for a seafloor core sample

Creator:: Almasoumi, Abdullah Muhammad Sultan
Abstract:: Of great benefit, but not limited to seafloor mineral exploration, is a technique that fairly rapidly determines the composition of a drilled vibracore (in a time comparable to the time involved in obtaining the core). The rapid assessment is desired to predict whether a given region warrants further exploration by...
Resource Type:: Dissertation
Full Text:: extended to the members of my Advisory Committee: Drs. Simon S. Johnson, Andrew C. Klein, John C. Ringle

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