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 18 of 18 for “"Operating cycle"”.
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Modeling and design of reload LWR cores for an ultra-long operating cycle
… performance design packages to develop extended cycle cores for existing Light Water Reactor (LWR) designs which respect current fuel burnup limits while considering the full range of practical design and economic considerations. The driving force behind this research was the desire to make …
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Surveillance strategy for a four year operating cycle in commercial boiling water reactors
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 1996.
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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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Economic and system reliability considerations for achieving an extended operating cycle for light water reactors
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 1996.
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Neutronic Characteristics of Using Zirconium Diboride and Gadolinium in a Westinghouse 17 X 17 Fuel Assembly
… has been a trend by the utilities to extend the operating cycle of their power reactors in the production of electricity. In order to achieve this, variations in fuel composition, fuel pin arrangement, and burnable absorber distribution have been proposed. Burnable absorbers are materials that …
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Design and development of a novel liquid desiccant air-conditioning system
… to the structure. This work lays out the basic operating cycle of the DECAL system and shows its thermodynamic merits in terms of ideal system performance against other LDAC systems. Design studies show DECAL offers improved thermal efficiency, especially in humid climates. The ideal thermal …
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Diagnostics for Periodically Operated Actuators
… that experience non-uniform loads during an operating cycle. The platform presented in this thesis serves state-of-the-art vibration and acoustic measurements and combines the quality of high-end acquisition systems with the portability of IoT devices. This allows for temporary field …
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LOW-POWER LOW-VOLTAGE ANALOG CIRCUIT TECHNIQUES FOR WIRELESS SENSORS
… of low cost, miniature desirable size and long operating cycle, passive wireless sensors which don't require battery are more preferred. Such sensors harvest energy from energy sources in the environment such as radio frequency (RF) waves, vibration, thermal sources, etc. As a result, the …
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The manufacture and commercial applications of metastannic acid and of tin dioxide based semiconducting materials
… plant to be designed together with a proposed operating cycle as part of this work. As well as manufacturing metastannic acid Keeling and Walker Ltd. also produce a range of tin dioxide based semiconductors for industrial applications. Work was carried out in this project to try to find a …
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Finite element model of thermoelastic damping in MEMS
… device geometry. Damping will become greatest at operating cycle times that are of the same scale as the thermal relaxation times of the device material. Due to the fact that analytical expressions exist for only a few simple geometries, a finite element model was developed to evaluate …
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Modelling and design of high-speed, long-lifetime and large-force electromagnetic actuators based on magnetic shape memory alloys
… of the designs and stable multi-billion cycle operation. The very long lifetime is achieved through careful analysis of the magnetic circuit and the behaviour of the MSM element during operation. Finally, thermal analysis is conducted for the designed actuators in order to ensure their …
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Reactor physics considerations for implementing silicon carbide cladding into a PWR environment
… To evaluate the feasibility of longer fuel cycles and higher power density in SiC clad fuel, a core design study was completed with uranium dioxide fuel and SiC cladding in a standard, Westinghouse 4-loop PWR. NRC-limited values for hot channel and hot spot values were taken into account as …
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A study of US nuclear power boiling water reactor, class IV, operating performance, 1992-1997
… design. The time frame of forced outages with in operating cycles was additionally reviewed. Failures were found to be more frequent in the early phase of the operating cycle following start up from a refueling and approximately 400 to 550 days after start up. The impact of these failures was not …
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The effect of base stock and additive packages in an automotive oil on the friction and wear behaviour of overhead camshaft and finger follower systems
… test conditions. An intermittent, stop/start operating cycle however results in eventual scuffing due to additive film depletion and repeated surface interaction under boundary lubrication conditions. From a range of 'new' materials tested for follower application the ceramics, with the …
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Economic and fuel-performance analysis of extended operating cycles in existing light water reactors (LWRs)
SECTION I: Economic Analysis of Extended Operating Cycles in Existing LWRs The generic economic aspects of extending operating cycles in LWRs are examined to assess the factors associated with cycle lengths at or near the limit of technical feasibility, based on current NRC mandated burnup limits. …
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Estudo dos fatores do planejamento financeiro de curto prazo: o caso de uma empresa do setor de construção civil
O objetivo deste estudo foi identificar e analisar os possíveis fatores que podem promover alterações nos fluxos de caixa planejados de empreendimentos habitacionais de uma construtora de grande porte em Recife. Trata-se de um estudo de caso qualitativo onde foram comparados e analisados os fluxos …
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Managing vessel arrival uncertainty in container terminals: a machine learning approach
… resources that need to interact over a 24 hour operating cycle. Since the various activities are mutually related to each other, there is a need not only to maximise the efficiency of each one, but also to ensure proper coordination, hence to solve integrated decision-making problems. Several …
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Modeling of Bio-inspired Jellyfish Vehicle for Energy Efficient Propulsion
… forces. The model uses the actual control cycle that was optimized for driving the artificial jellyfish vehicle "robojelly". Using a comparative analysis approach, fundamental understanding of the jellyfish bell deformation, thrust generation, and mechanical efficiency were provided. …