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 33 for “"Small modular reactors"”.
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Exclusions Zones for Small Modular Reactors
… estimate the size of the exclusion zone around a small modular reactor (SMR). The aim of such zone is to provide an atmospheric space sufficient to dilute any radioactive releases during an accident, to a level below the safe regulated radiation dose for the public. A hypothetical severe accident …
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Used nuclear fuel storage options including implications of small modular reactors
… storage. The second is the implications of small modular reactor (SMR) introduction for the nuclear fuel cycle, including demand for uranium, enrichment services and the amount of used nuclear fuel. The study considers the nuclear energy system evolution over a period of 100 years. Through a …
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Dynamic fuzzy reliability and safety assessment of passive safety systems in small modular reactors
Small Modular Reactors (SMRs) have garnered significant interest in recent years, and they may play an essential role in the future of energy supply and power generation. One major advantage associated with SMRs is their improved safety, which is expected to be accomplished by integrating a wide …
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Reforming EPZ framework for new nuclear reactors (SMR): an open-source and climate-aware approach
… Emergency 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 …
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Heat transfer to supercritical water flowing in short vertical bare tube and rod-bundle geometries
Water-cooled nuclear reactors have lower thermal efficiencies (26–38%) compared to thermal Power Pants (PPs) (up to 62%). To improve efficiency, SuperCritical Water-cooled Reactors (SCWRs) and SuperCritical-Pressure-Small Modular Reactors (SCP-SMRs) operate at supercritical pressures, requiring …
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Safety analysis of a compact integral small light water reactor
Small modular reactors (SMRs) hold great promise in meeting a diverse market while reducing the risk of delays during nuclear construction compared to large gigawatt-sized reactors. However, due to lack of economy of scale, their capital cost needs to be reduced. Increasing the compactness or power …
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Investigating the educational effectiveness of a science museum exhibit on small modular fusion reactors
… are unaware of the tremendous potential fusion reactors and smaller, more modular reactors possess. To inform them, a science exhibit was.constructed to investigate whether or not it would more effectively teach the audience which in this case are passersby on the first floor of MIT's building …
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Design and Modeling of Offshore Nuclear Platform Fuel and Transfer System
… Nuclear Platform (OFNP) aims to integrate Small Modular Reactors (SMRs) into an offshore setting. This endeavor is in line with global initiatives to mitigate temperature rise by 2050, using nuclear energy for electrical generation “Key Aspects of the Paris Agreement | UNFCCC.” A specific …
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Assessment of a compact steam generator aided by computational fluid dynamics
… implementation of new reactor designs such as Small Modular Reactors. Using a Printed Circuit Heat Exchanger (PCHE) such as those from the company HeatricTM as a steam generator to boil the liquid in the secondary side has potential to overcome the disadvantages of conventional steam …
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Computational Fluid Dynamics Modeling of Compact Steam Generators
… Steam Generators (CSGs) are vital components in Small Modular Reactors (SMRs), particularly within Integral Pressurized Water Reactor (iPWR) configurations where compactness and high performance are essential. This thesis explores the use of Multiphase Computational Fluid Dynamics (M-CFD) to …
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Silicon carbide performance as cladding for advanced uranium and thorium fuels for light water reactors
… characteristics as fuel cladding in light water reactors (LWRs). Compared to zirconium, SiC has higher melting point, higher strength at elevated temperature, and better dimensional stability when exposed to radiation, as well as lower thermal expansion, creep rate, and neutron absorption …
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Liquid Sodium Stratication Prediction and Simulation in a Two-Dimensional Slice
… sources and prohibitively high capital costs. Small Modular Reactors (SMRs), such as the proposed Advanced Fast Reactor (AFR) 100, have gained popularity in recent years as they promise economies of scale, reduced capital costs, and flexibility of deployment. Fast sodium reactors commonly …
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Decommissioning considerations for molten salt type reactors
Molten salt type small modular reactors are presently being developed as an option for providing electricity and alternative energy forms. The current proposed designs do not document how decommissioning will be addressed. The decontamination activities necessary for these reactor technologies upon …
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Degradation Mechanisms of Copper and Copper Alloys
… nuclear projects, including the design of small modular reactors, and the permanent disposal of nuclear waste in deep geological repositories.This document addresses the degradation methods that can affect materials used in the nuclear energy industry, both for electricity production and …
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Modeling nuclear’s role in climate change: optimized pathways to net-zero emissions
… is the role of nuclear energy, particularly Small Modular Reactors (SMRs), in supporting the transition away from fossil-fueled power plants to achieve net-zero emissions. This study introduces the DICE Nuclear Deployment Model (DNDM), a novel extension of the Nordhaus Dynamic Integrated …
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Incorporation of Corrosion Mechanisms into a State-dependent Probabilistic Risk Assessment
… in passive safety systems in Generation III+ and small modular reactors has brought a new focus in probabilistic risk assessment (PRA) to the treatment of passive systems, structures and components (SSCs). Although previously thought to play a lesser role in determining plant risk, research and …
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The Effect of Supply Chain Configuration on Small Modular Reactor Economics
This thesis examines the opportunity presented by small modular reactors (SMRs) to bring down the cost of nuclear power. The economies of scale that have traditionally driven nuclear vendors to design larger reactors can be overcome for small reactors by the combination of standardisation of …
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Is embedding the reactor building below grade a cost-effective proposition?
… of new plants, be they large LWRs (Light Water Reactors), SMRs (Small Modular Reactors) or Generation-IV designs. There are important trade-offs. Embedment of a reactor building requires a much larger excavation effort than is necessary for above-grade plants. However, embedded buildings have …
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Scaling siting criteria and identifying alternative licensing pathways for micro-reactors within the existing regulatory framework
Micro-reactors are a relatively recent subset of Gen IV reactors currently being developed, and due to their design features (i.e., no refueling onsite, easily transported, and mass produced), micro-reactors have the potential to tap into broader markets never accessed before by the nuclear sector …
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Dynamic accident sequence analysis using dynamic flowgraph method and Markov/cell-to-cell mapping technique
… assessment of passive safety systems in small modular reactors. A stochastic model of a passive Isolation Condenser System (ICS) was developed, and its state transition probabilities are computed using finite element method. The analysis predicts high system reliability, with the ICS most …
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