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Nursery school and multifunctional building Želivec - preparation and realization
Král, David ; Jiří,, Šlanhof (referee) ; Mohapl, Martin (advisor)
The masters thesis with the name Nursery school and multifunctional building Želivec solves preparation and realization of building. The aim of masters thesis is to design of time, financial and material resources. The thesis contains budget, time schedule, building-site, technological standard, control and trial plan, assessment of lifting mechanism and study of realization of the main stages. The thesis is prepared on the basis of technical documents submitted by the designer. Part of the thesis is specialization.
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Fusion systems and their shielding
Roubal, Michal ; Katovský, Karel (referee) ; Král, Dušan (advisor)
This thesis is concerned with nuclear fusion and its use as a source of energy for humanity. In the first part of my thesis, I will briefly explore the research history of nuclear fusion. Next, I will investigate the various possible issues connected with achieving and sustaining nuclear fusion. I will briefly discuss the importance of mastering it. I will talk about existing and anticipated risks of radiation damage which can occur during nuclear fusion. Lastly, i will discuss the principles of tritium breeding.
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Cathedral today
Král, David ; Mléčka, Jan (referee) ; Štěpán, Marek (advisor)
Theme of the thesis is a construction that is considered to be one of the most spectacular examples of a French gothic architecture. Notre-Dame Cathedral lies on the Eastern half of a Parisian island Île de la Cité on the river Seina. On April 15, 2019, roof of the cathedral caught on fire. It was completely destroyed, including its pinnacle. The thesis offers a solution how to restore the roof and what opportunities the new design brings. Aim of the proposal is enrichment of the Notre-Dame community through offering a new refuge, which will be for both, internal growth and spiritual practice itself. The design provides spaces that capture the path to God in them. I perceive the very path to God as a thorough inner work. That is why I am placing 36 contemplation booths in there, in addition to other 8 cabins. The light is removed from those, in order to extend the perception of consciousness. Spaces for individuals will be amended by 3 chapels for a group practice. Each chapel has its typical content - joint contemplation chapel, chapel that worships the Jesus Christ’s crown of thorns and a community chapel with a variable arrangement.
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Material for Part of Automobile Headlamp
Král, Dominik ; Dostál, Ondřej (referee) ; Molliková, Eva (advisor)
The aim of the presented work is to discuss the effects of the external environment, especially solar radiation, on the headlamp of a passenger car and the response of the material to this load. The work comes from the automotive industry environment. Headlamps and all their components must meet the requirements of quality, reliability and safety.
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Neutron sources in science and industry
Andrýsek, Jan ; Zeman, Miroslav (referee) ; Král, Dušan (advisor)
This bachelor thesis is composed of literature review on the topic of neutron sources and experimental component discussing the reaction rate in an experimental model of a neutron source dependent on the isotope in used foil. The most used neutron sources in the world and in the Czech Republic are mentioned. The creation of neutrons in radionuclide sources in AmBe and PuBE, nuclear reactors, spallation sources and fusion neutron generators are described, together with their utilisation in research and industry. The practical part contains description of the design (\(\gamma \), n) of a neutron source in MCNP programme and its consecutive calculation using the Monte-Carlo method. The input for nuclear reaction are electrons accelerated onto energy of 70 MeV. These electrons strike the target, where the effect of braking radiation generates gamma rays. Radiation integrates with the nuclei of the convertor from beryllium oxide or lithium salt. The results analysed and discussed are used from experimental measurements in Yerevan for foils from isotopes 197-Au, 209-Bi and 59-Co. These foils were used in models with convertors from Beo and LiCl.
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Analysis of thermal power plants environmental impacts using radioanalytical methods
Král, Dušan ; Ing. Ondřej Huml, Ph.D., KJR FJFI ČVUT v Praze (referee) ; Katovský, Karel (advisor)
Operation of classical power sources, like coal fueled thermal power plants, causes more or less strong impact on surrounded environment. Beside to the generally discussed CO2 emissions, there are CO, SOx, NOx too; and also fly ash emissions containing various trace elements depending on coal quality. Heavy trace elements carried by fly ash generate locally distributed fallout and contaminate soil in the power plant neighborhood for many years. These elements may be detected in soil samples as well as in biomass. Objectives of this work are to find and quantify trace elements in soil samples near Oslavany hard coal fueled thermal plant, which was in operation from 1913 to 1993. Power plant did not use any advanced fly ash filters. Hard coal was used as a fuel for power plant and it was mined locally in Rosice-Oslavany coal district in very deep mines (up to 1428 m). Coal contained a lot of trace elements. A mine as well as power plant is for more than 20 year closed, but trace elements can be still find in the environment. Main goal is to find these elements using activation analysis and gamma-ray spectrometry methodology. We have assembled thirty six soil samples in square lattice drawn around Oslavany power plant brownfield. On behalf of cooperation with colleagues from the Czech Technical University in Prague and their Open-Access project, we irradiated samples in three vertical channels of VR-1 research nuclear reactor. Irradiated samples were transported to gamma spectroscopy & activation analysis laboratory and measured by HPGe detector. Gamma spectra were analyzed and some trace elements identified. We have determine relative and absolute concentration of found elements. We observe and determine activity and weight of As, U, Ba, La, Eu, Mn, K, V, Mg and Na only. Results show a real suspicion for increase of trace elements in soil samples of hard coal power plant surroundings.
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Investigation of Thorium Utilization in Accelerator Driven Nuclear Reactors
Král, Dušan ; ČR, Petr Chudoba, ÚJF AV (referee) ; Zeman, Miroslav (advisor)
This thesis deals with the idea of using accelerator driven systems for thorium transmutation into the fissile material, which can be utilized in the accelerator driven systems and in thermal nuclear reactors. Thorium occurs on Earth only in fertile isotope Th-232. It can be converted to fissile U-233 by neutron capture and subsequent beta decay. The experimental part handles the data measured by the irradiation of four thorium samples by the secondary neutrons in the QUINTA spallation target, which was irradiated with 660~MeV protons. Reaction rates for the fission and spallation products were estimated using gamma spectroscopy and activation techniques. Furthermore, Pa-233 production rates were also determined in all experimental samples. Pa-233 and fission production rates were calculated in all experimental samples using the MCNPX transport code and evaluated nuclear data for high-energy reactions. The experimental results are of a great importance for the future investigation of thorium in the accelerator driven system concept, validation of Monte-Carlo based calculation codes and validation of high-energy nuclear models.
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Transmutation of spent nuclear fuel with using accelerator driven systems
Máca, Pavel ; Král, Dušan (referee) ; Zeman, Miroslav (advisor)
This bachelor thesis deals with the analysis of neutron spectra in the reactors with liquid salts. The teoretical part contains a brief description of the nuclear fuel cycles. In the theoretical are further described the reactors of IV. generations. Here are the reactors on the basis of liquid salts described in detail. The practical part of the bachelor thesis is focused on the analysis of neutron spectra in set-ups performer from solid salt. Concretly, the salts NaCl and KCl were analysed by means of the computational codes TALYS and MCNP.
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Characterization of the neutron AmBe source using threshold activation detectors
Burian, Jiří ; Zeman, Miroslav (referee) ; Král, Dušan (advisor)
Neutron activation analysis is used to characterize an unknown neutron field source or material of unknown composition. Using known reactions that take place in the activation detector due to the action of the neutron field, their measurement and evaluation, we can describe the composition of the source if we know the material composition of the activation detector, or, conversely, if we do not know the materials from which the activation detector is made, we can find out if we put this detector of unknown composition into the action of neutron radiation of known origin.
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