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Analysis of the Most Common Causes of Nuclear Fuel Failures During Operation
Ježek, Martin ; ČEZ,, Ondřej Zlámal, (referee) ; Katovský, Karel (advisor)
Nuclear fuel failures during the reactor operation happen quite often in the world. The theoretical part of this thesis is dedicated to the most common causes of nuclear fuel failures. It describes failure mechanism and corrective actions. The unfavorable trends in nuclear fuel behavior are prevented by suitable method of nuclear fuel monitoring. Some of them may affect the safety of the power plant. For example, the fuel assembly bow affects the function of rod cluster control assembly. Another part, which describes inspection methods, is devoted to inspection and repair of nuclear fuel. The thesis concentrates on the Temelin NPP, where there was implemented post-irradiation inspection program for checking compatibility between Westinghouse's fuel assemblies and water chemistry of reactor VVER. This program continues even after the change of nuclear fuel supplier. Practical part of this thesis is dedicated to proposal of a new method of fuel assembly bow measurement for Temelin NPP based on ultrasound. This proposal is supported by measurement on the experimental device for detection of spacer grid position developed by Research Centre Rez.
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The activities of the Czech ecological organisations: Case study Temelin
Novotná, Marcela ; Vymětal, Petr (advisor) ; Lisa, Aleš (referee)
This diploma thesis deals with activities of the Czech ecological organisations which were active in case of nuclear power plant Temelin after its breaking-in. The thesis is divided into four chapters. The first one focuses on the definition of the ecological organisation (movement). In the second chapter, the attention is paid to the history of foundation and functioning of the nuclear power plant Temelin. The third chapter is about advantages and disadvantages of the nuclear power. The last chapter focuses on the analysis of activities of the Czech ecological organisations which opposed or supported the nuclear power plant Temelin.
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Perished World of A. Pelíšek
HÁNDLOVÁ, Lenka
This thesis focuses on life and work of Antonín Pelíšek from a town of Ceske Budejovice. First, we introduce report and some authors focused on it. Then we take closer look at authors' lifelong work and his journalistic efforts. Main part of this thesis is focused on artistic reports and works, written in its spirit. The topic is a construction of nuclear power plant Temelin and a destruction of nearby villages. Story takes a closer look at life near borders. Loneliness, separation from home and feeling of hopelessness accompanied former residents of destroyed villages and are main points of all authors' works. Here also we will try to find some features of artistic reports. The building of the power plant is main topic of more works by various authors and those will be explained in the conclusion.
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Communication Strategy of the Temelín Nuclear Power Plant
Nekovářová, Lenka ; Král, Petr (advisor) ; Vokáč, Matěj (referee)
The thesis deals with the communication of the Temelín Nuclear Power Plant. Nuclear sources of energy are currently a sensitive issue. The planned extension of the Temelín NPP is also a frequently discussed topic in the Czech Republic; it affects many stakeholders and faces increased public and media interest. The goal of the thesis is to create a communication strategy of the Temelín NPP targeted to the public. The draft of the strategy is based on the conclusions of the SWOT analysis focused on the Temelín NPP communication, furthermore, on the analysis of selected online communication tools used by the Temelín NPP, and mainly on the quantitative survey conducted with the purpose to find out the actual public perception of the Temelín NPP and the public attitude to nuclear energy in general. The strategy also uses the knowledge of the company ČEZ media analysis and the findings of the sociological survey among inhabitants of the area close to Temelín compiled by STEM/MARK research agency.
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The Position of the EU to Nuclear Energy after Fukushima: Reactions of Germany and the Czech Republic
NEUMANNOVÁ, Nicole
The paper deals with the approach of the European Union or the approach of the Federal Republic of Germany and the Czech Republic to the nuclear disaster in Fukushima. The main aim is to describe and compare the reactions of these two states to the situation with regard to the historical position towards nuclear energy before the accident, but especially the political and social impact after the accident. In the first, theoretical, part the author presents basic information about nuclear energy, its advantages and disadvantages. This section also introduces a system for evaluation of nuclear disasters, along with examples of the most important accidents in history. The text also presents institutions and authorities which deal with nuclear power throughout the EU and the key legal texts that determine its official position and policy on this topic. In the second, practical, part the German and Czech responses to the incident in Fukushima are deeply analyzed. The author follows the development of perception of nuclear power in both states and the consequent impact on the common relations between the two countries.
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Completion of Nuclear Power Plant Temelín and its possible impact on Czech Republic's position in electricity trade
Fučík, Václav ; Němcová, Ingeborg (advisor) ; Horák, Jiří (referee)
This work tries to answer the question, if completion of the Nuclear Power Plant Temelín is necessary and advantegous. The completion is important for electricity market stability in the region of Central Europe. In Czech Republic's neighbouring states prevails the tendency of reducing their production capacities (for example German nuclear phase-out or closing of Polish coal power plants), the demand for Czech electricity will be probably ensured. Many of European states exploit nuclear energy, therefore it is not likely to ban it. Nuclear energy does not burden the environment and its exploitation is in comparison with other energy sources economically more favorable. Energy production using renewable sources is not stable and reliable enough, therefore it is impossible to build the whole electricity production sector on them. It is necessary to keep in mind the possible depletion of fossil fuels, which are for electricity production crucial at this time. On the other hand, there is a sufficient amount of nuclear fuels.
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The analysis of the existing evacuative plans from the emergency zone of the Nuclear power station Temelin.
ŠANDA, Petr
RÉSUMÉ This work concentrates on analysis of the outer emergency plan of the power station Temelin. It also focuses on documentation of radioactive matters which appear in extraordinary situations at the mentioned power station. There is an explanation of the outer emergency plan in the first part of this work. In the second chapter there is more detailed structure of this plan and also the plan of decontamination is mentioned here. There is a brief description of all single parts of that plan in the third chapter. The whole fourth part is about decontamination. There are some principles determined here. The principles are mentioned in order to explain how to proceed in carrying out the techniques of decontamination. The fifth part of this work describes what a radiation event is and what its grades are. There is a summary of pieces of knowledge of this work at the end. And there is also recommendation for the further progress in this section at the end of this work.
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Estimation of Tritium Activity in the River Vltavawith Respect to the Liquid Wastes from the Nuclear Power Plant Temelin.
ŠKOPEK, Petr
The main goal of this Thesis was to measure tritium activity in the Vltava River and in the vicinity of Temelín Nuclear Power Plant (hereinafter referred to as JETE) with the following objectives: Possibility to use the outlet of waste water damping unit (hereinafter referred to as VTOOV) as a control alerting system for nonstandard events in JETE, furthermore, monitoring of possible correlations between volume activity of tritium measured in VTOOV and activity above the limit value of the first quality class in selected sections of the Vltava River as well as comparison of the measured values with the results of other authors, and, finally, assessment of the relevance of the water quality estimated by the volume activity of tritium to the water quality according to other ingredients, i.e., stable isotopes of some metals and risk elements as well as general physical and chemical indicators. Theoretical part of the Thesis deals with radioactivity in general, activity of tritium, with regard to operation of nuclear plants, over the world and, especially, in the Czech Republic. The actual work consisted of collection of samples at predetermined places, preparation of these samples for measurement and measurement of tritium activity using scintillation spectrometer with liquid scintillator. Furthermore, basic chemical and physical properties of water, concentration of selected elements and also some anions were determined. The collected data were used for classification of waters from individual collection places into quality classes according to ČSN 75 7221. In all analyzed cases no activities were found which exceeded the limit values of liquid outlets from Temelín Nuclear Power Plant, given by regulations issued on waters by the District Health Office in Ceske Budejovice according to §8 of Act No. 138/73 Coll., in compliance with SÚJB requirements. This Thesis could be beneficial for possible utilization of VTOOV as a control alerting system for nonstandard events in JETE and also for assessment of impact of wastewaters from JETE on waters of the Vltava River.
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Detection of Ionizing Radiation in Radiological Controlled Area of Nuclear Power Plant Temelín.
DOUDOVÁ, Vendula
The power plant Temelin is equipped with the modern system of radiation control. The system meets high technical standard. It ensures the control of all parameters according requirements of our legislative and government authority. The system provides the control in such dimension to have necessary information about irradiation of workers and the population in neighbourhood, outlets to environment, and about the situation in the some selected technological circuits and systems. It is necessary to monitor the integrity of barriers in every mode of power plant Temelin including emergency and post-emergency conditions. The working environment in contained area of the power plant Temelin is monitored with stationary monitoring system and with the mobile instruments according the approved operational manual. The workplace monitoring is realized with surveillance, measurement, evaluation and recording parameters of ionizing radiation field and the occurrence of radionuclides in working area, especially the dose equivalent on the working area and the volume activities in the environment and the surface activities.
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