Browsing by Author "Nuclear and Radiological Engineering"
Now showing items 1-20 of 38
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A coarse mesh radiation transport method for reactor analysis in three dimensional hexagonal geometry
Connolly, Kevin John (Georgia Institute of Technology, 2012-11-06)A new whole-core transport method is described for 3-D hexagonal geometry. This is an extension of a stochastic-deterministic hybrid method which has previously been shown highly accurate and efficient for eigenvalue ... -
Assessing alterations in myocardial MN²⁺ fluxes following myocardial infarction in a murine model using T₁₋-mapping manganese-enhanced MRI
Waghorn, Benjamin J. (Georgia Institute of Technology, 2009-11-18)During cardiac ischemia, intracellular calcium (Ca²⁺) overload occurs which can result in cell death. MRI T₁ shortening contrast agent manganese (Mn²⁺) acts as a surrogate marker for Ca²⁺. Cardiac T₁-mapping manganese-enhanced ... -
Assessing internal contamination after a radiological dispersion device event using a 2x2-inch sodium-iodide detector
Dewji, Shaheen Azim (Georgia Institute of Technology, 2009-04-08)The detonation of a radiological dispersion device (RDD) may result in a situation where many individuals are exposed to contamination due to the inhalation of radioactive materials. Assessments of contamination may need ... -
Assessing the dose received by the victims of a radiological dispersal device with Geiger-Mueller detectors
Manger, Ryan Paul (Georgia Institute of Technology, 2008-07-10)This research investigates the use of G-M counters to triage the individuals who have been exposed to a Radiological Dispersal Device (RDD). Upon being exposed to an RDD, inhalation of the airborne radionuclide is a ... -
Atomistic studies on irradiation damage in iron
Hayward, Erin M. G. (Georgia Institute of Technology, 2010-04-08)Two topics involving irradiation damage in alpha-iron have been considered. First, damage cascades representative of those that would be induced by radiation have been simulated using molecular dynamics (MD). The number ... -
A broad spectrum neutron spectrometer utilizing a high energy Bonner sphere extension
Burgett, Eric A. (Georgia Institute of Technology, 2008-04-03)A novel broad spectrum neutron spectrometer has been created to extend the useful energy range of existing neutron Bonner Sphere Spectrometers (BSS). Both an active LiI(Eu) scintillator probe and passive gold foil detector ... -
A coarse mesh radiation transport method for prismatic block thermal reactors in two dimensions
Connolly, Kevin John (Georgia Institute of Technology, 2011-07-07)In this paper, the coarse mesh transport method is extended to hexagonal geometry. This stochastic-deterministic hybrid transport method calculates the eigenvalue and explicit pin fission density profile of hexagonal ... -
A Coarse Mesh Transport Method with general source treatment for medical physics
Hayward, Robert M. (Georgia Institute of Technology, 2009-11-17)The Coarse-Mesh Transport Method (COMET) is a method developed by the Computational Reactor and Medical Physics Group at Georgia Tech. Its original application was neutron transport for nuclear reactor modeling. COMET has ... -
A coarse-mesh transport method for time-dependent reactor problems
Pounders, Justin Michael (Georgia Institute of Technology, 2010-04-06)A new solution technique is derived for the time-dependent transport equation. This approach extends the steady-state coarse-mesh transport method that is based on global-local decompositions of large (i.e. full-core) ... -
The Correction of Pebble Bed Reactor Nodal Cross Sections for the Effects of Leakage and Depletion History
Hudson, Nathanael Harrison (Georgia Institute of Technology, 2006-05-19)An accurate and computationally fast method to generate nodal cross sections for the Pebble Bed Reactor (PBR) was presented. In this method, named Spectral History Correction (SHC), a set of fine group microscopic cross ... -
Development and implementation of convergence diagnostics and acceleration methodologies in Monte Carlo criticality simulations
Shi, Bo (Georgia Institute of Technology, 2011-12-12)Because of the accuracy and ease of implementation, the Monte Carlo methodology is widely used in the analysis of nuclear systems. The estimated effective multiplication factor (keff) and flux distribution are statistical ... -
Development of dosimetry and imaging techniques for pre-clinical studies of gold nanoparticle-aided radiation therapy
Jones, Bernard Lee (Georgia Institute of Technology, 2011-04-05)Cancer is one of the leading causes of death worldwide, and affects roughly 1.5 million new people in the United States every year. One of the leading tools in the detection and treatment of cancer is radiation. Tumors can ... -
Entropy-based diagnostics of criticality Monte Carlo simulation and higher eigenmode acceleration methodology
Shi, Bo (Georgia Institute of Technology, 2010-06-10)Because of the accuracy and ease of implementation, Monte Carlo methodology is widely used in analysis of nuclear systems. The obtained estimate of the multiplication factor (keff) or flux distribution is statistical by ... -
Evaluation of internal contamination levels after a radiological dispersal device using portal monitors
Palmer, Randahl Christelle (Georgia Institute of Technology, 2010-08-24)In the event of a radioactive dispersal device (RDD), the assessment of the internal contamination level of victims is necessary to determine if immediate medical follow-up is necessary. Thermo Scientific's TPM-903B Portal ... -
Evolution of radial force balance and radial transport over L-H transition
Sayer, Min-hee Shin (Georgia Institute of Technology, 2012-11-14)Understanding of plasma confinement modes is an essential component in development of a fusion reactor. Plasma confinement directly relates to performance of a fusion reactor in terms of energy replacement time requirements ... -
Extension of neoclassical rotation theory for tokamaks to account for geometric expansion/compression of magnetic flux surfaces
Bae, Cheonho (Georgia Institute of Technology, 2012-09-06)An extended neoclassical rotation theory (poloidal and toroidal) is developed from the fluid moment equations, using the Braginskii decomposition of the viscosity tensor extended to generalized curvilinear geometry and a ... -
FW-CADIS variance reduction in MAVRIC shielding analysis of the VHTR
Flaspoehler, Timothy Michael (Georgia Institute of Technology, 2012-09-27)In the following work, the MAVRIC sequence of the Scale6.1 code package was tested for its efficacy in calculating a wide range of shielding parameters with respect to HTGRs. One of the NGNP designs that has gained large ... -
Gamma and neutron dose profiles near a Cf-252 brachytherapy source
Fortune, Eugene C., IV (Georgia Institute of Technology, 2010-07-07)A new generation of medical grade Cf-252 sources was developed in 2002 at the Oak Ridge National Laboratory (ORNL). The combination of small size and large activity of these Cf-252 sources makes them suitable to be used ... -
Generalized spatial homogenization method in transport theory and high order diffusion theory energy recondensation methods
Yasseri, Saam (Georgia Institute of Technology, 2013-04-03)In this dissertation, three different methods for solving the Boltzmann neutron transport equation (and its low-order approximations) are developed in general geometry and implemented in 1D slab geometry. The first method ... -
A generic biokinetic model for C-14 labelled compounds
Manger, Ryan Paul (Georgia Institute of Technology, 2010-07-07)Carbon-14, a radioactive nuclide, is used in many industrial applications. Due to its wide range of uses in industry, many workers are at risk of accidental internal exposure to 14C. Being a low energy beta emitter, 14C ...