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 21 for “"LBE"”.
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Study of geometry effects on local corrosion rates for Lbe loop
… resistance to corrosive Lead Bismuth Eutectic (LBE). A Delta Loop was designed and constructed in Los Alamos National Lab (LANL) to obtain the experimental data. This loop is a multi-section closed system that differs in diameter from one part to another. As a result, an intensive study on the …
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Calibration of YSZ sensor for the measurement of oxygen concentration in Lbe
Although liquid lead-bismuth eutectic (LBE) is a good candidate for coolant in the sub-critical transmutation blanket, it is known to be corrosive to stainless steel tubes and containers used in nuclear installations. To prevent the long-term corrosion problem by producing and maintaining a …
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CFD analysis of three-dimensional thermalhydraulics flow effects on wall concentration gradient profiles for Lbe loop fittings
… on the wall concentration gradient profiles in LBE loop fittings. To that end detailed models of the fittings have been constructed to study these effects. These fittings include sudden expansion, sudden contraction, t-joint and elbow. The typical flow rates chosen for these simulations are …
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The Electrical Impedance Responses of Protective Oxide Scales on Stainless Steels That Are Immersed in Molten Lead-Bismuth-Eutectic Alloy at Temperatures Up to 600°C
… immersed in molten lead-bismuth-eutectic alloy (LBE) at high temperatures (up to 600°C). LBE is a candidate coolant for future fast-neutron-spectrum nuclear reactors and for accelerator-driven nuclear systems, in which the LBE can also act as the spallation target. Stainless steels, out of …
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The electrical impedance responses of protective oxide scales on stainless steels that are immersed in molten lead-bismuth-eutectic alloy at temperatures up to 600°C
… immersed in molten lead-bismuth-eutectic alloy (LBE) at high temperatures (up to 600°C). LBE is a candidate coolant for future fast-neutron-spectrum nuclear reactors and for accelerator-driven nuclear systems, in which the LBE can also act as the spallation target. Stainless steels, out of which …
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Application and economic feasibility of functionally graded composite for lead-bismuth service
… in tubes production mainly for advanced LBE (Lead-Bismuth Eutectic) reactor systems. An analysis was carried out on this new technology's benefits and its commercialization to evaluate whether or not the technology has economic feasibility if it then is used and commercialized in LBE …
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Static corrosion of candidate alloys for the lead-bismuth fast reactor
… alloys for use in Lead-bismuth Eutectic (LBE) cooled fast nuclear reactors. The two alloys examined were T91 and Fe-12Cr-2Si. An experimental study was performed to analyze the static corrosion on the two alloys. For the experiment, the polished samples of the two alloys were heated in LBE …
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Material Corrosion by Nuclear Reactor Coolants
… high-temperature steam, lead-bismuth eutectic (LBE), and molten salt. Novel cladding materials for accident tolerant fuel (ATF) and additive manufacture (AM) Ni-based alloy were studied in water coolants. Similarly, the ATF material and Ni-based alloys were also examined under high-temperature …
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Pokročilé kompozitní konstrukční oceli pro použití v taveninách těžkých kovů
… základě analýzy poškození ODS ocelí v prostředí LBE byla navržena ochrana povrchu ODS oceli pomocí oxidické ochranné vrstvy. ODS ocel chráněná oxidickou vrstvou byla následně podrobena koroznímu testu v LBE. Pro experimenty byly zvoleny tři třídy chromových ocelí: feriticko-martenzitická ocel …
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The design of a functionally graded composite for service in high temperature lead and lead-bismuth cooled nuclear reactors
A material that resists lead-bismuth eutectic (LBE) attack and retains its strength at 700°C would be an enabling technology for LBE-cooled reactors. No single alloy currently exists that can economically meet the required performance criteria of high strength and corrosion resistance. A …
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New Tower of Babel: Probing the Antecedents and Consequences of Linguistic Ostracism
… This study tested the Language-Based Exclusion (LBE) model proposed by Kulkarni and Sommer (2014) and summoned additional support for the contextual antecedents uncovered in Study 1. Consistent with the LBE model, positive state affect mediated the relationship between LO and self-reported …
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Thermal analysis of uranium zirconium hydride fuel using a lead-bismuth gap at LWR operating temperatures
… it has been proposed that lead-bismuth eutectic (LBE) be used as the gap material instead of helium. In order to ensure that the properties of UZH while using a LBE gap, specifically the thermal conductivity, do not degrade to the point of the fuel not being viable, an experiment was designed and …
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Superfuture: How global superminds can use immersive experiences to build a positive future
… 360 cameras and location based experiences (LBE) in interesting and unique ways.
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SVM-based Strategies as applied to Electromagnetics
… approaches based on learning-by-example (LBE) techniques, this thesis focuses on the development of a strategy for the solution of complex problems by means of support vector machine (SVM). The proposed instance-based classification method compared to more traditional optimization …
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Development of the Adaptive Collision Source Method for Discrete Ordinates Radiation Transport
… to solve the Linear Boltzmann Equation (LBE) more efficiently by adaptation of the angular quadrature order. The angular adaptation method is unique in that the flux from each scattering source iteration is obtained, with potentially a different quadrature order used for each. …
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Mesoscopic lattice Boltzmann nemato-dynamics.
… geometries. The model is based upon two coupled LBE schemes, the standard momentum density distribution and a new link angle distribution. To achieve evolution, the link angle distribution undergoes a Bhatnagar-Gross-Krook (BGK) collision step and advects (propagates) in unit time with the …
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Materials testing and development of functionally graded composite fuel cladding and piping for the Lead-Bismuth cooled nuclear reactor
… composite steel which resists high temperature LBE corrosion. This composite steel consists of a Fel2Cr2Si protective layer weld overlaid on a T91 steel and then drawn to fuel cladding and piping material. A series of tests and materials analysis were performed on the composite piping material. …
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Development of a Novel Detector Response Formulation and Algorithm in RAPID and its Benchmarking
… particle transport - Linear Boltzmann Equation (LBE). The LBE includes seven independent variables with presence of integral and differential operators. Moreover, the low successive rate of radiation shielding problem is also challenging for solving such problems. In this dissertation, the …
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Silicon carbide performance as cladding for advanced uranium and thorium fuels for light water reactors
… material from helium to lead-bismuth eutectic (LBE) and adding a central void in the fuel pellet. In addition, the consequences of using thorium oxide (ThO₂) as host matrix for plutonium oxide (PuO₂) were covered. The effects of cladding thickness on fuel performance were also analyzed. A …
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Alternate Load Paths and Retrofits for Long-span Truss Bridges under Sudden Member Loss and Blast Loads
… truss bridge using the *Load_Blast_Enhanced (LBE) formulation in LS-DYNA. Based on several blast loadings simulation examples, the identification of finite element (FE) model-related parameters, i.e., mesh size, material models and properties (i.e., strain rate effect) both for concrete and …
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