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 216 for “"nuclear reactors"”.
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High temperature concrete for nuclear reactors
… that may be experienced in a normally operating nuclear reactor.
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Observer-based fault detection for nuclear reactors
This is a study of fault detection for nuclear reactor systems. Basic concepts are derived from fundamental theories on system observers. Different types of fault- actuator fault, sensor fault, and system dynamics fault can be detected and localized by studying the asymptotic response of an error …
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Fuel processing simulation tool for liquid-fueled nuclear reactors
Nuclear reactors with liquid fuel offer multiple advantages over their solid-fueled siblings: improved inherent safety, fuel utilization, thermal efficiency, online reprocessing, and potential for nuclear fuel cycle closure. To advance this promising reactor design, researchers need a simulation …
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Stability Criteria for Nuclear Reactors Subject to Periodic Reactivity Perturbations
Made available in DSpace on 2014-12-09T19:52:18Z (GMT). No. of bitstreams: 1 6607709.pdf: 3486339 bytes, checksum: 5384f6e6a512cb869de8e0056ea12dc2 (MD5) Previous issue date: 1966
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A new non-proliferation risk model for small nuclear reactors
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2027-05-01
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Containment building : architecture between the city and advanced nuclear reactors
Since the inception of nuclear energy research, the element thorium (Th) has been considered the superior fuel for nuclear reactions because of its potency, safety, abundance and reduced waste. Cold War agendas broke from the logic of efficient energy production to establish a nationwide network of …
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A supercritical carbon dioxide cycle for next generation nuclear reactors
… Brayton power cycles for application to advanced nuclear reactors. The recompression cycle is shown to excel with respect to simplicity, compactness, cost and thermal efficiency. The main advantage of the supercritical CO2 cycle is comparable efficiency with the helium Brayton cycle at …
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Domain decomposition for Monte Carlo particle transport simulations of nuclear reactors
… have long been considered the gold-standard for nuclear simulations, but high computational cost has limited their use significantly. However, as we move towards higher-fidelity nuclear reactor analyses the method has become competitive with traditional deterministic transport algorithms for the …
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The treatment of uncertainties in the thermal design of nuclear reactors
Massachusetts Institute of Technology. Dept. of Nuclear Engineering. Thesis. 1967. Ph.D.
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Towards Semi-Autonomous, Highly Automated, and Remotely Operated (SAHARO) Nuclear Reactors
… to ensure the safe and reliable operation of nuclear power plants (NPPs). Most of these plants have belonged to the same design class: large, centrally located Light Water Reactors (LWRs). Thus, our regulatory processes were tailored for their phenomenology and the unique challenges associated …
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An Investigation of Major Component Disposal Costs for Advanced Nuclear Reactors
… is an important aspect for decommissioning of Nuclear Power Plants (NPPs) that requires an understanding of the characteristics of the waste forms. The costs of disposal depend on the activity, volume, dose rate and waste handling/packaging. The U.S. average nuclear reactor age is 40 years old, …
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Integrating thermal energy storage and nuclear reactors: A technical and policy study
… Thermal Energy Storage (TES) and sodium fast reactors has been previously considered, but only at a conceptual level. This work expands on those concepts and creates a detailed engineering and system design for an integrated nuclear Thermal Energy Storage (nTES) system. The design uses General …
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Hydrogen : what fuel cell vehicles and advanced nuclear reactors have in common
… and/or political advantages of using an advanced nuclear reactor coupled to a thermochemical conversion plant to produce hydrogen with respect using a conventional nuclear reactor coupled to an electrolysis plant? The results suggest that given the existing technical and cost uncertainties, …
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Corrections to and Applications of the Antineutrino Spectrum Generated by Nuclear Reactors
… spectrum as specifically generated by nuclear reactors is studied. The topics covered include corrections and higher-order effects in reactor antineutrino experiments, one of which is covered in Ref. [1] and another contributes to Ref. [2]. In addition, a practical application, …
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Power conversion system design for supercritical carbon dioxide cooled indirect cycle nuclear reactors
… cycle which couples nicely to many Generation IV nuclear reactors. This work investigates the power conversion system design and proposes several "Third Generation" plant layouts for power ratings ranging between 20 and 1200 MWe for the recompression cycle. A 20 MWe simple cycle layout was also …
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Diffusion Barrier Coatings for Liquid Metal Corrosion Resistance in Next-Generation Nuclear Reactors
… a ceramic diffusion barrier coating applied onto nuclear reactor cladding, liquid metal coolants, and metallic fuel used in Sodium-Cooled Fast Reactors (SFRs) and Lead-Cooled Fast Reactors (LFRs). In SFRs and LFRs, damage to cladding and structural materials from the liquid metal coolant poses …
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Neural network calibration of moderator temperature coefficient measurements in pressurized water nuclear reactors
Neural networks have been shown to be capable of predicting the moderator temperature coefficient in a nuc1ear reactor by using the frequency response functions between the in-core neutron flux signal and the ex-core thermocouple signal as inputs. In this work, actual data from a nuc1ear reactor is …
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Development of high fidelity methods for 3D Monte Carlo transient analysis of nuclear reactors
Monte Carlo is increasingly being used to perform high-fidelity, steady-state neutronics analysis of power reactor geometries on today's leadership class supercomputers. Extending Monte Carlo to time dependent problems has proven to be a formidable challenge due to the significant computational …
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Reforming EPZ framework for new nuclear reactors (SMR): an open-source and climate-aware approach
… Planning Zones which applies to Small Modular Reactors and Pressurized Water Reactors while adapting to geographical conditions. The analysis examined severe accident such as Long- term Station Blackout (LSTBO), focused on how climate change increases risks related to things like flooding and …
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