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 12 of 12 for “"Fuel-channel"”.
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Localization of a robotic crawler for CANDU fuel channel inspection
… a pipe crawling robot for the purpose of CANDU fuel channel inspection. The pipe crawling robot shall be capable of deploying the existing CIGAR (Channel Inspection and Gauging Apparatus for Reactors) sensor head. The main focus of this thesis is the design of the localization system for this …
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Design and enhancements for a CANDU robotic fuel channel inspection system
… Canadian Deuterium Uranium (CANDU) reactor fuel channels. A dual cable management system was developed to hold the necessary cables for the robotic crawler to operate and provide additional odometry data. A deployment scheme for the robotic inspection system integrated into the Bruce Reactor …
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Design and development of a robotic crawler for CANDU fuel channel inspection
… of a new robotic crawler drive unit for CANDU fuel channel inspection, a complete design and screening process was done in order to fulfil the objective of this research. A brief explanation of CANDU reactors is provided along with a discussion of the inspection systems that are currently in …
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Conceptual design for a re-entrant type fuel channel for supercritical water-cooled nuclear reactors
… CANDU-type nuclear reactors use a once-through fuel-channel with an annulus gas insulating it from the moderator. The current reference design for a CANDU-type SuperCritical Water-Cooled Reactor (SCWR) is to eliminate the annulus gap and use a ceramic insert to insulate the coolant from the …
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Generating and Simulating CANDU® Fuel Channel Eddy Current Data to Demonstrate Multi-Parameter Extraction Capabilities
… Pressure Tube to Calandria Tube (PT-CT) gap in Fuel Channels is larger than the minimum requirement. Contact between the two tubes can severely reduce the structural integrity of the PT. The measurement is affected by nearby conducting structures, which include Liquid Injection Shutdown System …
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Design of a power, communications, and cable system for use with a robotic crawler for CANDU fuel channel inspection
… in Canada. CANDU reactors require regular fuel channel inspection to ensure safety and performance. Fuel channel inspection is currently done one channel at a time which results in significant reactor downtime. The proposed system is a robotic crawler inspection system which can inspect the …
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Transmutation rates in the annulus gas of pressure tube water reactors
… Uranium) reactor utilizes Pressure Tube (PT) fuel channel design and heavy water as a coolant. Fuel channel annulus gas acts as an insulator to minimize heat losses from the coolant to the moderator. Since fuel bundles are continuously under high neutron fluxes, annulus gas nuclides undergo …
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Thermal aspects of high efficiency channel with conventional and alternative fuels in SuperCritical water-cooled reactor (SCWR) applications
… high outlet temperatures. A generic pressure-channel (or pressure-tube)SCWR operates at a pressure of 25 MPa with inlet- and outlet-coolant temperatures of 350°C and 625°C. Consequently, the sheath and fuel centerline temperatures are higher in SCWRs than those of the current nuclear reactors. …
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Study on specifics of thermalhydraulics and neutronics of pressure-channel supercritical water-cooled reactors (SCWRs)
… SCWR is featured with 3-batch refueling, 336 vertical fuel channels, a porous ceramic insulator inside the pressure tube, and stainless-steel cladding. The reactor operates at a pressure of 25 MPa with the coolant temperature rising from 350 to 625°C. Consequently, sheath and fuel …
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Improved 3D modelling of CANDU reactors using transport-fitted diffusion coefficients
… type heavy water reactors with natural-uranium fuel, two levels of calculations are required. Initially, lattice-level transport calculations are carried out to obtain, with high detail and accuracy, the flux distribution inside the lattice cell and composition of the nuclear fuel. Lattice …
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Impact of thorium based molten salt reactor on the closure of the nuclear fuel cycle
… reactor (LFTR) is a MSR concept based on thorium fuel cycle. LFTR uses liquid fluoride salts as a nuclear fuel. It uses <sup>232</sup>Th and <sup>233</sup>U as the fertile and fissile materials, respectively. Fluoride salt of these nuclides is dissolved in a mixed carrier salt of lithium and …
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Computational fluid dynamic investigations of flow through an aged CANDU pressure tube
… simulations of twelve simplified CANDUTM 37M fuel bundles sitting in both as-received and aged pressure tubes were performed with Hydra in this work. The predicted coolant flow behaviour of two cases were compared in order to investigate the impact of pressure tube deformation (sag and …