Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 617 for “"Nuclear Science and Engineering."”.
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Conceptual design of nuclear-geothermal energy storage systems for variable electricity production
… Institute of Technology, Dept. of Nuclear Science and Engineering, 2011.
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Simulation of liquid entrainment in BWR annular flow using an interface tracking method approach
… Institute of Technology, Dept. of Nuclear Science and Engineering, 2012.
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Security and the Offshore Nuclear Plant (ONP) : security simulation testing and analysis of the multi-layer security system
The ONP research team from the Nuclear Science and Engineering Department at MIT has been researching and developing the possibility of a nuclear reactor deployed on an offshore platform out to sea. Such a reactor deployed up to twelve nautical miles offshore poses a significant security risk that …
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Examination of hull forms for an Offshore Nuclear Plant
The Nuclear Science and Engineering Department at MIT has a concept design for an Offshore Nuclear Plant (ONP). This project highlights the advantages of the offshore location by reducing the risk of natural disasters and cost of terrestrial nuclear power facilities. The original ONP conceptual …
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Ship collision and the Offshore Floating Nuclear Plant (OFNP) : analysis of possible threats and security measures
The OFNP research group in the Nuclear Science and Engineering Department at MIT is developing a power plant that combines two well-established technologies -- light water reactors and offshore platforms -- into a new design called the Offshore Floating Nuclear Plant (OFNP). Deploying a nuclear …
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Sviluppo di un nuovo approccio per la quantificazione in tempo reale dell'attività dei radiofarmaci.
La medicina nucleare è un ramo specializzato della medicina che si concentra sulla diagnosi e il trattamento delle malattie nei campi dell'oncologia, cardiologia e neurologia. Essa prevede l'amministrazione di un composto marcato con un radionuclide emettitore di raggi gamma o positroni nel corpo …
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The economics of alternative fuel cycles on sodium-cooled fast reactors and uncertainty and sensitivity analysis of cost estimates
… the capital costs while maintaining safety and performance. This thesis expands on the capital cost model to include uncertainty analysis, as well as performing qualitative cost evaluations for the fuel cycle and O&M costs. An uncertainty model was developed from the available data for …
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Energy partition in magnetic reconnection and kinetic turbulence in weakly collisional plasmas
… dissipation of energy in magnetic reconnection and decaying turbulence in weakly collisional plasmas. One of the open questions regarding magnetic reconnection is how magnetic energy is dissipated into particle heating, kinetic energy, and supra-thermal particle acceleration; an understanding of …
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On-node performance optimization of a Monte-Carlo transport code for leadership architectures
… Carlo neutron transport code (i.e., OpenMC) and implemented several optimizations to address the major bottlenecks. First, a comprehensive profiling analysis was carried out on modern Intel micro-architectures (i.e., Intel Xeon Phi and Intel Xeon Platinum 8180) to understand what hardware and …
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Selection and implementation of deterministic and probabilistic models for the prediction of stress corrosion cracking in used nuclear fuel containment material
… vented concrete overpacks are used to store used nuclear fuel at interim spent fuel storage installations in the United States. These storage systems are exposed to the elements. There is concern that, over time, a deliquesced salt film could develop on the stainless steel canister. Such a film …
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Fault-tolerant passively integrating in-vivo dosimeters for feedback-enabled proton therapy (IF²D, or integrating feedback F-center dosimeter)
… between radiation received by the targeted tumor and the surrounding healthy tissue. The Integrating Feedback F-center Dosimeter is designed to be fault-tolerant, with the capability to distinguish the radiation dose received between a targeted tumor and surrounding tissue. To provide a proof of …
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North Korea's nuclear weapons : interpreting weapon design progress based on nuclear test data
The proliferation of nuclear weapons is a significant global security issue, and it is important to carefully study the nuclear weapons programs of states that are actively engaging in nuclear proliferation. In this thesis, I interpret the seismic and radionuclide data from North Korea's first two …
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Engineering upgrades to the Motional Stark Effect diagnostic on Alcator C-Mod
… experienced unacceptable calibration drift and sensitivity to partially-polarized background light that limited its ability to measure magnetic field pitch-angles. The need to identify the cause of the polarization drift and to characterize sources of error motivated the development of a …
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Determination of pool boiling Critical Heat Flux enhancement in nanofluids
… pool boiling Critical Heat Flux (CHF) of Alumina and Silica water-based nanofluids of concentration less than or equal to 0.1 percent by volume were measured. Silica nanofluids showed CHF enhancement up to 68% and there seems to be a monotonic relationship between nanoparticle concentration and …
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Computational treatments for neutron resonance elastic scattering in Monte Carlo nuclear simulations
Simulations are vital to the safe design and operation of nuclear reactors. It is therefore important that they accurately treat the physics of nuclear interactions. This work investigates the phenomenon of neutron resonance scattering with a moving target, which can affect the post-collision …
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Nonlinear gyrokinetic simulations of intrinsic rotation in up-down asymmetric tokamaks
Experiments and theory show that tokamak plasmas with strong toroidal rotation and rotation shear can suppress turbulent energy transport as well as allow violation of the Troyon [beta] limit. However, using external neutral beams to inject toroidal momentum, as is done in many current experiments, …
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Memory efficient indexing algorithm for physical properties in OpenMC
… with a focus on parallel scalability for large nuclear reactor simulations. The target problem for OpenMC is a full core high-fidelity multi-physics coupled simulation. This encompasses not only nuclear physics, but also material science and thermohydraulics. One of the challenges associated …
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Evaluation of the thermal-hydraulic operating limits of the HEU-LEU transition cores for the MIT Research Reactor
… to analyze the thermo-hydraulic safety margins and to determine the operating power limits of the MITR for each mixed core configuration. The analysis was performed using PLTEMP/ANL ver 3.5, a program that was developed for thermo-hydraulic calculations of research reactors. Two correlations …
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Characterization of ferromagnetic saturation at 4.2K of selected bulk rare earth metals for compact high-field superconducting cyclotrons
… the rare earth ferromagnetic metals gadolinium and holmium was investigated. Cylindrical samples were placed in a superconducting test magnet and induced magnetic field measured at various applied fields. Data was obtained with Hall sensors mounted at the tips of the cylinders, and a powerful …
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Silicon carbide performance as cladding for advanced uranium and thorium fuels for light water reactors
… to reduce if not eliminate the autocatalytic and exothermic chemical reaction with water and steam at above 1,200 °C. The search for an accident tolerant cladding intensified after the Fukushima events of 2011. Silicon carbide (SiC) possesses several desirable characteristics as fuel cladding …
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