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Browsing by Supervisor "Hlatshwayo, Thulani Thokozani"
Now showing items 1-18 of 18
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(University of Pretoria, 2017)Generation IV high temperature nuclear reactors use TRISO (tristructural isotropic) particles for containment of radioactive fission products. In these particles silicon carbide (SiC) is the main barrier for containing ...
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(University of Pretoria, 2019)In my PhD study glassy carbon samples were implanted with 250 keV europium ions at room temperature and at 100 oC. The main purpose of my study was to study the diffusion properties of the europium in the glassy carbon. After ...
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Effect of heat treatment on the migration behaviour of selenium implanted into polycrystalline SiC (University of Pretoria, 2021)The success of a very high temperature gas cooled reactors (VHTGRs) like a pebble bed modular reactor (PBMR) depends greatly on the retainment of fission products. In PBMR the retainment is achieved by coating the fuel ...
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(University of Pretoria, 2022)Safety of nuclear reactors strongly depends on the containment of fission products. In modern nuclear reactors, this is accomplished by coating the fuel with chemical vapour-deposited layers of carbon (C) and silicon carbide ...
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(University of Pretoria, 2022)Containment of radioactive fission products (FPS) is a cornerstone in the revival of nuclear reactors as a clean energy source. In modern generation IV nuclear reactors, safety is enhanced by coating the fuel kernel ...
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(University of Pretoria, 2023)The storage and management of nuclear waste is perhaps the most controversial aspect of nuclear power production, as there is no permanent solution to this problem that has existed for centuries. In the last decade, our ...
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(University of Pretoria, 2021)The containment of fission products (FPs) in a nuclear fuel particle is the biggest concern regarding the safety of high temperature reactors (HRTs). In modern high temperature gas cooled nuclear reactors (HTGRs), safety ...
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(University of Pretoria, 2019-12-15)The effect of ion irradiation and annealing on the microstructure and migration behaviour of implanted Sr and Ag in SiC have been investigated. SiC is used as the main barrier for fission products in modern high temperature ...
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(University of Pretoria, 2021-04)SUMMARY Owing to their superior properties, TiN and TiC have been proposed as potential fuel cladding materials for the proposed generation IV (Gen IV) nuclear energy systems. In this application they will be exposed ...
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(University of Pretoria, 2020)In modern nuclear reactors safety is improved by cladding the fuel kernel with chemical vapor deposited layers of pyrolytic carbon and silicon carbide. Amid these cladding layers SiC is the primary diffusion barrier of ...
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(University of Pretoria, 2019)Owing to its outstanding properties, zirconium nitride (ZrN) has been proposed as a possible candidate for inert matrix for transmutation of long-lived nuclear waste (plutonium and minor actinides) in fast nuclear reactors. ...
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(University of Pretoria, 2020-07-01)The demand for dry casks for extended storage of radioactive nuclear waste is driven by dearth of permanent repositories. Most of the dry cask storage system currently in use are made up of stainless steel which could ...
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(University of Pretoria, 2017)Silicon carbide (SiC) is used as the main diffusion barrier to prevent the fission products (FPs) from escaping in high temperature reactors (HTRs). It retains most of the FPs quite effectively with the exception of silver, ...
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(University of Pretoria, 2017)The release of radioactive fission products during nuclear energy reactor operation imposes a serious danger to personnel’s health and the environment. In a modern Pebble Bed Modular Reactor (PBMR) TristructuralIsotropic ...
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(University of Pretoria, 2019)This study is in two parts. Both parts are geared towards the study of the effectiveness of glassy carbon as a good storage material was investigated. Firstly, 200 keV Xe ions were implanted into glassy carbon substrates ...
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(University of Pretoria, 2014)In modern high temperature nuclear reactors, silicon carbide (SiC) is used as the main diffusion barrier for the fission products in coated fuel spheres called TRISO particles. In the TRISO particle, pyrolytic carbon and ...
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(University of Pretoria, 2014)A pebble bed modular reactor (PBMR) is a modern type high-temperature gas-cooled nuclear reactor (HTGR). The fuels of the PBMR are in the form of small multi-layered spheres called triple-coated isotropic (TRISO) particles. ...
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(University of Pretoria, 2019)In this thesis,zirconium carbide (ZrC) layers were deposited on graphite substrates using a CVD reactor at temperatures ranging from 1250 °C to 1450 °C in steps of 50 °C. The deposited layers were characterised by XRD, ...
Now showing items 1-18 of 18