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Nuclear fuel cycles of Dukovany NPP
Peroutková, Alena ; Varmuža, Jan (referee) ; Katovský, Karel (advisor)
This thesis describes types of nuclear power plants, construction of pressurized water reactor, principle of fission processes and energy release. There is more detailed described how reactor works, following chapter of quantities describing operating status. Also is described whole fuel cycle from the uranium extraction to the used fuel storing. Next part of thesis is describing all campaigns of the Dukovany nuclear power station. Thesis also defines steps leading to increasing effectivity energy utilization. This is shown on many graphs and tabs. At the end of thesis, there is a calculation of specific uranium consumption.
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Front end of the fuel cycle
Sedlák, Miroslav ; Katovský, Karel (referee) ; Foral, Štěpán (advisor)
Bachelor thesis will work of the front of the fuel cycle. Summarize and describe the current knowledge related to uranium, the phase transformation of unemployable chemical element for mankind significant energy source. Understanding the process of processing uranium to energy source is invaluable importance for the future of energy. The use of uranium as fuel only brings advantages inherent in the usability element for humanity, but also the disadvantege of environmental threats and the threat of negative censequences to the environment in case of accidents. A thorough knowledge of the various stages of the fuel cycle contributes to increasing the safety of use of this chemical element for mankind and increasing efficiency in the conversion of uranium ore, thereby creating still more favorable conditions for the development of nuclear energy.
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Nuclear Fuel Cycle of Dukovany NPP
Dudáš, Michal ; Foral, Štěpán (referee) ; Katovský, Karel (advisor)
The goal of this bachelor’s thesis is to introduce the nuclear fuel cycle of nuclear power plant Dukovany focusing on its middle part. It describes the methods of loading fuel assemblies in-out and out-in, the differences between continual (on-load reactors) and campaign kind of fuel cycle. There are briefly described individual types of fuel used on nuclear power plant Dukovany from the start to recent days. It is further followed by the external fuel cycle. The front end describes more about mining, enrichment and fabrication. There are also few different separation methods of uranium described. The back end deals with different ways of spent fuel storage, spent fuel pools, and dry cask storage as well as ultimate disposal. The paper also contains brief overview among the most known nuclear reactors with the short descriptions of its own nuclear fuel cycles. It is further followed by description of fuel cycles with different length, focusing on different types of fuel and different loading methods. There is also a possible concept of outages for nuclear power plant Dukovany considering few different long lasting campaigns. The paper contains economic assessment considering the simplified conditions. It also deals with pros and cons of individual cycles focusing on organization operating and spent fuel storage.
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Nuclear Fuel and its Behavior during Burn-up
Matocha, Vítězslav ; Foral, Štěpán (referee) ; Katovský, Karel (advisor)
The point of this bachelor’s thesis is to characterize different types of nuclear fuels and their behaviour during the process of burning-up. Futher, basic types of nuclear reactors are mentioned, as well as their history and different kinds of nuclear fuels used in these reactors. Then there are pieces of information about fuel cycles and fuel burning-up. Furthermore, the thesis concentrates on the changes, which happen in the nuclear fuel during the process of burning-up, such as swelling and cracking. In its other parts, this bachelor’s thesis deals with fission products, mainly gas fission products are mentioned here. At the end of this thesis, a simple model of nuclear fuel burning-up is created. This model follows concentration of izotopes of uranium and plutonium during fuel burning-up.
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Front and Back End of the Nuclear Fuel Cycle
Winterová, Radka ; Mastný, Petr (referee) ; Katovský, Karel (advisor)
In this bachelor thesis author deals with the topic of nuclear power fuel cycle and the particular differences that are typical for each nuclear reactor types. The author aims to describe in detail both - the front and especially the back end of the nuclear fuel cycle, fuel fabrication for light water nuclear reactors, fuel reprocessing and recycling, and consequently fuel production based on REPU and MOX. Thesis should also get familiar with global approaches to fuel cycle, especially the back end.
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Analysis of possibilities for use of III. and IV. generation of nuclear reactors for the Czech Republic
Gajdzica, Lukáš ; Kopřiva, Radek (referee) ; Kopřiva, Radek (referee) ; Matal, Oldřich (advisor)
The thesis deals with the analysis of possibilities for use of III. and IV. generation of nuclear reactors for the Czech Republic. Introduction deals with basic principles of nuclear energetics and fuel cycle which is closely associated with the issue and its development and application in practice will have a significant effect both for choice of future types of nuclear reactors of IV. generation and the matter of settlement with spent nuclear fuel. In other parts the thesis deals with the present state of nuclear energetics in the Czech Republic, compares concrete chosen types of nuclear power plants of III. generation and generally describes nuclear reactors and power plants of IV. generation. Final part of the work is focused on questions concerning the possibility of construction of new blocks of nuclear power plants in the Czech Republic and presents concrete recommendation from author´s point of view.
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Nuclear Fuel Loading Patterns at VVER Reactor Based Nuclear Power Plants
Šajdler, Miroslav ; Vojáčková, Jitka (referee) ; Katovský, Karel (advisor)
The Master's thesis focuses on loading patterns of nuclear reactors VVER. It describes the whole process of fuel cycle, since production to storage or reprocessing. The author puts emphasise on the middle part of fuel cycle in Czech nuclear power plants - Dukovany and Temelín and he also explains which fuels are used in both power plants now and which were used in history. The thesis also contains a basic overview of approaches to loading patterns optimisation in foreign countries. The final part of the thesis discusses practical calculation of loading patterns in the Block III of Nuclear power plant Dukovany, by using optimisation programme Athena and Moby-Dick macrocode.
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Nuclear Fuel Loading Patterns Optimization at VVER Reactor Based Nuclear Power Plants
Šajdler, Miroslav ; Vojáčková, Jitka (referee) ; Katovský, Karel (advisor)
This Master’s thesis deals with optimization of loading patterns of nuclear reactors VVER. In the thesis is described the process of both types of fuel cycle – the closed and the open one. The middle part of fuel cycle containing the optimization process represents the crucial part of the thesis. The thesis is focused on the fuel cycles of the nuclear power plant Dukovany. The problem of the optimization is solved by using different programs. In the final part of the thesis, the program Athena for the loading patterns optimation is explained by a practical calculation for different versions of Moby-Dick macrocode and the calculated values for the optimization of the third unit of the nuclear power plant Dukovany are compared.
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Fuel of nuclear reactors and fuel cycle
Bátěk, David ; Nerud, Pavel (referee) ; Šen, Hugo (advisor)
This bachelor thesis describes nuclear fuels used in today's nuclear reactors as well as parts of fuel cycle, which includes all activities like uranium mining and prepairing, energy utilization and storage at the end of a cycle. There are also information about world production of uranium and posibilities of manipulation with used nuclear fuel, including transmutation technologies.
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