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1038 full-text articles. Page 1 of 18.

Proton Therapy Facility Shielding, Hadyn M. Daugherty, Isaac C. Waaldschlager, Daniel S. Elkins, Alyxandria Wszolek, Rachel N. Gaudet 2016 University of Tennessee, Knoxville

Proton Therapy Facility Shielding, Hadyn M. Daugherty, Isaac C. Waaldschlager, Daniel S. Elkins, Alyxandria Wszolek, Rachel N. Gaudet

University of Tennessee Honors Thesis Projects

No abstract provided.


Accelerator Shielding For A Bee Hive Irradiator, Robert F. Turner, Matthew O'Neil, Victoria Martin, Saya Rutherford, Danielle McFall, Ali Buhamad 2016 University of Tennessee, Knoxville

Accelerator Shielding For A Bee Hive Irradiator, Robert F. Turner, Matthew O'Neil, Victoria Martin, Saya Rutherford, Danielle Mcfall, Ali Buhamad

University of Tennessee Honors Thesis Projects

No abstract provided.


Particle Entrainment Studies From Dry And Wet Bed, Saber Ayatollahi 2016 The University of Western Ontario

Particle Entrainment Studies From Dry And Wet Bed, Saber Ayatollahi

Electronic Thesis and Dissertation Repository

During the Fluid Coking Process™ bitumen is sprayed into a fluidized bed of hot coke particles. The bitumen undergoes thermal cracking and is converted into gasses, condensable vapors, and solid coke, which deposits on the coke particles. These vapors rise through the vessel and result in entrainment of coke particles. Wet fine coke particles from the freeboard region enter the cyclone and contribute to the fouling of the Coker cyclones which can lead to the premature shut-down of Fluid Cokers.

The primary objective of this research is to determine how bed wetness affects entrainment.

First, a new fluidized bed was ...


Using Ultrasonic Flowmeters In Integral Pwr Instrumentation, Jason T. Rizk, Shawn Tyler, Matthew Buttrey, Michael Cooper, Kendall Minor 2016 University of Tennessee, Knoxville

Using Ultrasonic Flowmeters In Integral Pwr Instrumentation, Jason T. Rizk, Shawn Tyler, Matthew Buttrey, Michael Cooper, Kendall Minor

University of Tennessee Honors Thesis Projects

No abstract provided.


Control System Requirements For A Nuclear Thermal Propulsion System, Adam Hasse, Michael Smith, Bradley Pershke, Andrew Adams, Stephen Gilliam 2016 University of Tennessee, Knoxville

Control System Requirements For A Nuclear Thermal Propulsion System, Adam Hasse, Michael Smith, Bradley Pershke, Andrew Adams, Stephen GilliAm

University of Tennessee Honors Thesis Projects

No abstract provided.


Novel Integrated Solar-Nuclear Combined Cycle Power Plant, Nima Fathi, Patrick Mckdaniel, Matthew Robinson, Seyed Sobhan Aleyasin, Charles Forsberg, Peter Vorobieff, Salvador Rodriguez, Cassiano de Oliveira 2016 University of New Mexico

Novel Integrated Solar-Nuclear Combined Cycle Power Plant, Nima Fathi, Patrick Mckdaniel, Matthew Robinson, Seyed Sobhan Aleyasin, Charles Forsberg, Peter Vorobieff, Salvador Rodriguez, Cassiano De Oliveira

Nima Fathi

Rather than dumping the waste heat rejected by a nuclear power plant to a wet cooling tower, a better solution may be to connect it to a solar chimney power plant system (SCPPS). This is particularly true in arid regions. The SCPPS serves the function of a dry cooling tower but also produces additional electrical power. In a solar chimney power plant, the energy of buoyant hot air is converted to electrical energy. This solar power plant includes a collector at ground level, covered with a transparent roof that collects the solar radiation, heating the air inside and the ground ...


Procesy Cieplne I Aparaty (Lab), Wojciech Budzianowski 2016 Wroclaw University of Technology

Procesy Cieplne I Aparaty (Lab), Wojciech Budzianowski

Wojciech Budzianowski

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Remote Sensing Of Neutron And Gamma Radiation Using Aerial Unmanned Autonomous System, Alex Barzilov, Jessica Hartman, Ivan Novikov 2016 University of Nevada, Las Vegas

Remote Sensing Of Neutron And Gamma Radiation Using Aerial Unmanned Autonomous System, Alex Barzilov, Jessica Hartman, Ivan Novikov

Graduate & Professional Student Association Research Forum

With the continuing advancement of nuclear technologies, the detection and identification of radioactive material is a necessary part of commercial and government applications. There is a wide array of options available for detection and identification of material, but most rely on compact devices which are manually positioned. The deployment of robots equipped with detection equipment is not always feasible, especially in locations where there is considerable debris on the ground, or where there are low clearance areas. To solve this, the goal of this research was to design a remote sensing system for radiation using unmanned aerial vehicles (UAVs). A ...


Magnetic Materials Characterization And Modeling For The Enhanced Design Of Magnetic Shielding Of Cryomodules In Particle Accelerators., Sanjay K. Sah 2016 Virginia Commonwealth University

Magnetic Materials Characterization And Modeling For The Enhanced Design Of Magnetic Shielding Of Cryomodules In Particle Accelerators., Sanjay K. Sah

Theses and Dissertations

Particle accelerators produce beams of high-energy particles, which are used for both fundamental and applied scientific research and are critical to the development of accelerator driven sub-critical reactor systems. An effective magnetic shield is very important to achieve higher quality factor (Qo) of the cryomodule of a particle accelerator. The allowed value of field inside the cavity due to all external fields (particularly the Earth’s magnetic field) is ~15 mG or less. The goal of this PhD dissertation is to comprehensively study the magnetic properties of commonly used magnetic shielding materials at both cryogenic and room temperatures. This knowledge ...


Perspectives For Low-Carbon Electricity Production Until 2030: Lessons Learned From The Comparison Of Local Contexts In Poland And Portugal, Wojciech Budzianowski, Joao Gomes 2015 Wroclaw University of Technology

Perspectives For Low-Carbon Electricity Production Until 2030: Lessons Learned From The Comparison Of Local Contexts In Poland And Portugal, Wojciech Budzianowski, Joao Gomes

Wojciech Budzianowski

This paper compares perspectives for low-carbon electricity production in two EU member states - Poland and Portugal until 2030. Electricity production capacities, carbon emissions of electricity production, and production cost of electricity (COE) of Poland and Portugal are analyzed. The dilemmas of investments into low-carbon electricity production technologies relying on: (i) renewable energy sources (RES), (ii) nuclear fuel, and (iii) fossil fuels integrated with carbon capture and sequestration (CCS) are discussed. Roadmap 2050 recommends about 40% decarbonization of electricity generation by 2030 and 100% by 2050. Based on electricity production mix forecast for 2030 carbon emissions of electricity are estimated at ...


Combined Nuclear-Solar Cycle, Nima Fathi 2015 University of New Mexico

Combined Nuclear-Solar Cycle, Nima Fathi

Nima Fathi

Rather than dumping the waste heat rejected by a nuclear power plant to a wet cooling tower, a better solution may be to connect it to a solar chimney power plant system (SCPPS). This is particularly true in arid regions. The SCPPS serves the function of a dry cooling tower but also produces additional electrical power. In a solar chimney power plant, the energy of buoyant hot air is converted to electrical energy. This solar power plant includes a collector at ground level, covered with a transparent roof that collects the solar radiation, heating the air inside and the ground ...


Inżynieria Chemiczna Lab., Wojciech Budzianowski 2015 Wroclaw University of Technology

Inżynieria Chemiczna Lab., Wojciech Budzianowski

Wojciech Budzianowski

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Conference Proceedings, Resrb 2016, 22-24 June 2016, Wrocław, Poland, Wojciech M. Budzianowski 2015 Wroclaw University of Technology

Conference Proceedings, Resrb 2016, 22-24 June 2016, Wrocław, Poland, Wojciech M. Budzianowski

Wojciech Budzianowski

No abstract provided.


Intercode Advanced Fuels And Cladding Comparison Using Bison, Frapcon, And Femaxi Fuel Performance Codes, Aaren Rice 2015 University of South Carolina - Columbia

Intercode Advanced Fuels And Cladding Comparison Using Bison, Frapcon, And Femaxi Fuel Performance Codes, Aaren Rice

Theses and Dissertations

The high density uranium-based fuels are regaining popularity as the current fleet of LWR’s are showing interest in uprating plants to increase accident tolerance and performance. Fuels such as U3Si2, UN, and UC all contain a higher uranium loading and thermal conductivity than that of UO2 making them attractive in combination with an advanced cladding type such as the ceramic SiC cladding. In addition to adding more mass uranium to the core without surpassing current enrichment limits, these advanced fuels and claddings are designed with increased accident tolerance performance in a LOCA type scenario in mind. One of the ...


Methodology For Generating Simplified Cross Section Data Sets For Neutron Transport Calculations, Thomas Jay Harrison 2015 University of Tennessee - Knoxville

Methodology For Generating Simplified Cross Section Data Sets For Neutron Transport Calculations, Thomas Jay Harrison

Doctoral Dissertations

Neutron shielding problems involve radiation transport calculations over a wide range of energies. Fission neutrons have initial energy on the order of MeV, fusion neutrons have initial energy on the order of 10s of MeV, and space-origin neutrons have initial energy on the order of 100s of MeV or higher. Shielding calculations must track the neutrons from their initial energies until they are no longer of interest; for deep-penetration neutrons, this final energy can be on the order of eV before the neutron is no longer tracked. Thus, for deep-penetration space radiation shielding problems, the calculation may require tracking the ...


Development And Characterization Of A Directional Radiation Detection System Using A Fuzzy Logic Algorithm, Michael Joseph Willis 2015 University of Tennessee - Knoxville

Development And Characterization Of A Directional Radiation Detection System Using A Fuzzy Logic Algorithm, Michael Joseph Willis

Doctoral Dissertations

Traditional radiation detection equipment consists of various types of devices that are capable of determining the presence of radioactive sources in the vicinity of the detection unit. Use of these systems typically consists of survey and search methods that employ broad area sweeps to narrow down the location of a radioactive source. Although these methods are effective, they are typically inefficient and lack the ability to produce a directional bearing of the source relative to the measurement location. More efficient methods that provide relative direction information for detected sources would facilitate a more timely response to a potential radiological threat ...


Quantification Of Fast-Neutron Sources With Coded Aperture Imaging, Timothy Donald Jackson 2015 University of Tennessee - Knoxville

Quantification Of Fast-Neutron Sources With Coded Aperture Imaging, Timothy Donald Jackson

Doctoral Dissertations

Quantification of the mass of plutonium in facilities that process plutonium is important for both nuclear safeguards concerns and safety concerns, and multiple methods to nondestructively quantify plutonium sample characteristics have been proposed, particularly when the sample is located directly adjacent to or within the measurement device. In prior work, coded-aperture fast neutron imaging has been developed to demonstrate the imaging of neutron emitting radiation sources in a qualitative fashion, where the sources may be located meters to tens of meters away. Building upon prior work, this work develops the use of a Maximum Likelihood Expectation Maximization (MLEM) reconstruction technique ...


Ion Irradiation-Induced Microstructural Change In Sic, Chien-Hung Chen 2015 University of Tennessee - Knoxville

Ion Irradiation-Induced Microstructural Change In Sic, Chien-Hung Chen

Doctoral Dissertations

The high temperature radiation resistance of nuclear materials has become a key issue in developing future nuclear reactors. Because of its mechanical stability under high-energy neutron irradiation and high temperature, silicon carbide (SiC) has great potential as a structural material in advanced nuclear energy systems.

A newly developed nano-engineered (NE) 3C SiC with a nano-layered stacking fault (SFs) structure has been recently considered as a prospective choice due to enhanced point defect annihilation between layer-type structures, leading to outstanding radiation durability.

The objective of this project was to advance the understanding of gas bubble formation mechanisms under irradiation conditions in ...


Study Of Secondary Particles Produced From Heavy-Ion Interactions, Pi-En Tsai 2015 University of Tennessee - Knoxville

Study Of Secondary Particles Produced From Heavy-Ion Interactions, Pi-En Tsai

Doctoral Dissertations

The study of secondary particles produced from heavy-ion interactions is important in heavy ion radiotherapy, space radiation protection, and shielding at accelerator facilities. This dissertation focuses on the study of secondary neutron production as they are of special concern among all secondary particles.

The first part of this dissertation is the measurement of secondary neutrons created from 4He [helium] stopped in various target materials together with the model calculations accomplished by PHITS, FLUKA, and MCNP transport codes. The comparison results show that the physics models need improvements particularly in the predictions of 1) neutrons created from the 4He ...


Ion Irradiation Characterization Studies Of Max Phase Ceramics, Daniel William Clark 2015 University of Tennessee - Knoxville

Ion Irradiation Characterization Studies Of Max Phase Ceramics, Daniel William Clark

Masters Theses

The family of layered carbides and nitrides known as MAX phase ceramics combine many attractive properties of both ceramics and metals due to their nanolaminate crystal structure and are promising potential candidates for application in future nuclear reactors. This thesis reports on the background, design, and analysis of an experiment focused on determining the effects of energetic heavy ion irradiations on polycrystalline samples of titanium silicon carbide 312, titanium aluminum carbide 312, and titanium aluminum carbide 211. The irradiation conditions consisted of ion doses between 10 and 30 displacements per atom at temperatures of 400 and 700 degrees Celsius, conditions ...


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