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.
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Showing 1 to 20 of 52 for “"Pressurized water reactors."”.
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Actinide minimization using pressurized water reactors
Transuranic actinides dominate the long-term radiotoxity in spent LWR fuel. In an open fuel cycle, they impose a long-term burden on geologic repositories. Transmuting these materials in reactor systems is one way to ease the long-term burden on the repository. Examining the maximum possible …
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An alternate high pressure injection system for pressurized-water reactors
… to a major rupture in the primary system of a pressurized water reactor (PWR), tests were conducted using the thermal-hydraulic computer code RELAP4/MOD5.</p> <p>The results for the overall plant system show that the maximum core average fuel cladding temperature reached during an intermediate …
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Optimization of the axial power shape in pressurized water reactors
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 1982.
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Feed and bleed in pressurized water reactors analyzed under uncertainty
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 1984.
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A mathematical model of iodine spiking in pressurized water reactors
When a pressurized water reactor is operated for a sufficiently long period of time, a small number of fuel rods will develop ruptures in their claddings. These defects will leak volatile fission products into the primary coolant, including radioactive iodine. During steady-state operation of the …
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Design strategies for optimizing high burnup fuel in pressurized water reactors
… the strategy for utilizing high-burnup fuel in pressurized water reactors (PWR) with special emphasis on the full array of neutronic considerations. The historical increase in batch-averaged discharge fuel burnup, from ~30 MWd/kg in the 1970s to ~50 MWd/kg today, was achieved mainly by …
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Achievable power uprates in pressurized water reactors using uranium nitride fuel
… the potential benefits of nitride fuel use in pressurized water reactors. The AP1000 is chosen as the reference power plant. Both oxide and nitride fuel are considered and compared using a steady state thermal hydraulics and mechanics parametric optimization study to achieve a maximal core …
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Application of advanced fuel concepts for use in innovative pressurized water reactors
… alternative fuel and cladding combinations in a pressurized water reactor (PWR) environment. In the switch from a UO2 with zirconium-based cladding to any other combination, there is a multitude of questions that need to be answered. This work examines three of these knowledge gaps: (1) the …
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A core reload pattern and composition optimzation methodology for pressurized water reactors
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 1985.
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The effect of axial power shaping on ore utilization in pressurized water reactors
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 1980.
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Estimation of coping time in pressurized water reactors for accident tolerant fuel claddings
… motivated improving the safety of current light water reactors (LWRs). Accident tolerant fuels (ATF) are being developed to enhance the safety of LWRs by tolerating loss of active cooling in the core for a longer duration compared to standard UO₂ and Zirconium-based claddings. In this work, …
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A surveillance strategy for four year operating cycle in commercial pressurized water reactors
Thesis (Nucl. E.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 1996.
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Optimization of a seed and blanket thorium-uranium fuel cycle for pressurized water reactors
A heterogeneous LWR core design, which employs a thorium/uranium once through fuel cycle, is optimized for good economics, wide safety margins, minimal waste burden and high proliferation resistance. The focus is on the Whole Assembly Seed and Blanket (WASB) concept, in which the individual seed …
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Two-phase CFD analyses in fuel assembly sub-channels of Pressurized Water Reactors under swirl conditions
… swirl conditions in sub-channel geometries of pressurized water reactors (PWR) FAs, including a realistic description of the critical heat flux (CHF)-phenomena and identification of two-phase indicators characterizing CHF-phenomena. The numerical simulations were conducted with a 3-D CFD code …
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The effects of changing economic conditions on energy costs in stainless-steel clad pressurized water reactors
Thesis: M.S., Massachusetts Institute of Technology, Department of Nuclear Engineering, 1962
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Neutronic feasibility assessment of full-core applications of evolutionary mixed-oxide fuels in pressurized water reactors
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 1998.
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An improved method for estimating the moderator temperature coefficient of pressurized water reactors using multivariate autoregression
… temperature coefficient (MTC) of reactivity in pressurized water reactors based on a newly established technique is described. Previous work has correlated stochastic fluctuations in the reactor core-exit temperature with similar fluctuations in the in-core neutron flux. The frequency response …
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Multiphysics modeling of activity transport and evolution of CRUD and steam generator oxides in pressurized water reactors
… cladding, known as crud, in the core of light water reactors can cause a variety of operational issues. Buildup of radioactive crud and corrosion products on ex-core structures, such as steam generators and piping, can cause increased radiation fields and higher dose exposures for plant …
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Investigation into Greedy Exhaustive Dual Binary Swaps (GEDBS) for the optimization of core configuration in pressurized water reactors
In order to promote nuclear power production as an attractive option for power generation, measures must be taken to ensure that the process is both safe and economical. One aspect of the nuclear fuel cycle that contributes significantly towards such goals is the management of the fuel. Proper fuel …
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Technical and Economic Feasibility of Crushed Rock with Synthetic Oil Heat Storage Coupled to Light Water Reactors in the United Arab Emirates
… the electricity sector. The UAE is building four pressurized-water reactors and expanding solar generation. Large-scale addition of solar without storage results in excess capacity and inefficient dispatch during some periods of the year. Adding heat storage to the nuclear power plants was …
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