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Analytical methods applied for the evaluation of environmental contamination by uranium ore mining
Bílek, Jiří ; Holubová, Zuzana (referee) ; Čáslavský, Josef (advisor)
This thesis deals with the testing procedures used in monitoring of environmental contamination after uranium ore mining in the uranium mine in Dolní Rožínka. It deals with the determination of radioactive elements radium, uranium and radon. The methods used for the determination of radioactive elements in mine laboratory in Dolní Rožínka are described. The thesis also mentions other applicable methods for determination of uranium. The metods of determination of manganese, iron and other metallic elements are also summarized in brief.The values of concentrations of monitored analytes in selected locations are presented at the end of the thesis. These values, which were provided by laboratories in Dolní Rožínka, are valid for 2010.
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Vstupování nehudebních prvků do hudebních struktur
Cílková, Eliška ; RATAJ, Michal (advisor) ; TROJAN, Jan (referee)
Since the beginnings of musical art, composers have been reflecting on the social topics of their time. We can mention the great industrial revolution and Honneger's composition inspired by the Pacific 271 steam locomotive. Radioactive decay is one of the basic phenomena in the universe thanks to which our Earth is kept in balance. The first part of this work deals with a brief history and current trends in working with numbers as well as with generative music and reflections of the natural environment in music. The second part explores the history of radioactivity in conjunction with music and presentes a few examples of direct evidence that throughout the history of music, radioactivity has already been dealt with by composers. It also outlines a possible linkage of the two themes and refers to the art form of soundscape. The third part describes scientific measurements and shows on a few specific musical examples the practical possibilities of using radioactive data in compositional practice.
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Assessment of devices used by the Armed Forces of the Czech Republic in case of radiation emergency.
LOŠKOVÁ, Romana
This Thesis deals with the option of employing the Armed Forces of the Czech Republic (ACR) when a radiation emergency is imminent. Primarily, it focuses on evaluation of selected devices designed for radiation reconnaissance; summarising of radiation protection related legislation; and study of approved procedures. At its beginning, this Thesis tracks the origin of early detection systems at the territory of the then Czechoslovak Socialist Republic and their gradual evolution into the the existing form. From the radiation emergency point of view, this nationwide system represents a priceless help for monitoring of radioactive contamination dispersion and for warning. The following part sums up basic information on what is an ionizing radiation, how it comes into being and which basic quantities describe it. This part also contains basic type distinction, description of consequences for human organism and the most significant interactions of sources of ionizing radiation that could be misused with the most probability. This specific topic is introduced here because of the subsequent part of this Thesis being named Radiological Dispersion Device, or the dirty bomb. The significant part of this Thesis is the summary and classification of related legislation. The first documents referred to are two international standards. Publication 103 the 2007 Recommendations of the International Commission on Radiological Protection is dealing, inter alia, with dosing limits determining dose levels in planned exposure situations and reference levels used for emergency exposure situations and existing exposure situations. Publication 96 Protecting People against Radiation Exposure in the Event of a Radiological Attack is more substantial for this Thesis since it partly copes with the protection of front-line units including Integrated Rescue System (IRS) components and it specifies maximum exposure time for intervening personnel. Based on the IRS Catalogue of Typical Activities (STC 01/IZS), Materialised and Verified Use of a Radiological Weapon, the ACR would be one of the intervening components in such an attack. This Thesis analyses in detail individual ACR procedures starting with activities before employment, through threat prevention, event reaction to post-event activities like decontamination followed by monitoring of personnel contamination and their health condition. The practical part deals mainly with one of the Thesis´s goals which was evaluation of selected dosimetric devices used by the military for radiation reconnaissance. For this purpose, the quantitative research processing their main parameters was applied. The analysis within a selected sample was used for comparing and the sumary index IVi then showed the status of device applicability for contemporary use in radiation emergency. The pre-defined goals of this Thesis have been met implementing the above methods. The comparison of individual devices and their evaluation in respect to their applicability in joint radiation emergency operation with other IRS components has been carried out via discussion. It has been found out that some of the devices are obsolete and do not comply with the requirements for this job. This fact reflects the reality that these devices were designed in the period of a potential nuclear war. This corresponds with their robust structure and high level of sensitivity which is not desirable for a radiation emergency. The most severe problem, however, seems to be the fact that some devices measure quantities in old, no more used, units which could cause misinterpretation. On the other hand, other devices are modern, sensitive at low levels of dose input and offer real-time information on a well organised LCD display. To answer the question of ACR´s readiness to intervene in a radiation emergency one has to say that the ACR is ready to meet its rescue and consequence management tasks at a satisfactory level.
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Application of semiconductor gamma spectrometry in experimental reactor physics
KUČERA, Jan
In the present bachelor thesis, a database for efficiency calibration of a gamma-spectrometry device with cascade summing correction was built using software developed by the company Canberra. The formation of the database consists in the construction of a model for a shielding of semiconductor detector and of models for measured radioactive samples with various geometries. The designed model was tested on measured spectra of gamma radiation and a selected calibration curve was compared with the results obtained by Research Center Rez using the MCNP method. Moreover, several theoretical results were obtained in the course of this work, including the technical parameters and usage of experimental reactors at Research Center Rez and the principles of gamma radiation spectrometry in the LR-0 reactor.
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Risk assessment associated with the release of radioactive iodine from nuclear medicine department during a fire
RAMBOUSKOVÁ, Lucie
Nuclear medicine is the branch of medicine that is used to diagnosis and treatment with radioactive isotopes. Nuclear medicine is one of the least burdensome non-invasive methods of investigation. In contrast to diagnostic radiology, which shows the structure of organs , nuclear medicine provides information not only anatomical , but also on organ functions and metabolism. In many cases it is a unique diagnostic test that can detect the disease or its extent before, and thus increase the chance of successful treatment. When working with open emitters for nuclear medicine department can be assumed that may occur in the expected manner of use of radioactive sources only incident of First Instance ( spilling or splashing radiopharmaceuticals, patient pollution ) and very rarely an emergency occurs the second stage (the loss or theft of resources radiation). An extraordinary event is the third-degree radiation accident with very minimal probability of occurrence. The aim of the Bachelor thesis is to map the distribution and the storage of radioactive iodine in the Department of nuclear medicine of the hospitals in the Czech Republic, to determine the level of knowledge of the medical staff and members of the fire rescue Corps and their application in practice, in the release of radioactive iodine, and assess the degree of risk associated with the release of radioactive iodine in the fire. The hypothesis assumes that the medical staff and members of the fire rescue Corps know how to proceed in cases of leakage of radioactive iodine from the Department of nuclear medicine, and that the level of risks associated with the release of radioactive iodine in the fire is negligible. It is a form of qualitative research, research-questionnaire and interview-driven method. In an interview, polootevřený will be used and the type of closed questions. The research staff of the Department consists of a set of nuclear medicine and the members of the fire rescue Corps. Thesis will be used for more detailed study of the issue. It may also be used in lectures and seminars, health workers, and a fire department Rescue Corps.
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Biodosimetry for persons exposed to alpha radiation: dependence on malignity (exp. work).
KŘÍŽOVÁ, Marcela
In the thesis I focus on evaluation of the effect of familiar occurrence of cancer on presence and number of micro-nuclei in blood preparations with particular groups of persons. One of the biodosimetry methods, test for presence, number and kind of micro-nuclei, was used. I was not investigating the dosages as such and connection of the number of micro-nuclei with the dose, however, I followed up the effect of potentially influencing side factor on presence and number of micro-nuclei, which is the familiar occurrence of tumour. As a lot of information about ionizing radiation, its sources, radioactivity, radio-biologically important quantities, mechanisms of effects, molecular and cellular changes and biodosimetric methods as such falls under the topic, the theoretical part of diploma project is dedicated to such information. In the practical part, evaluation of the number and kind of micro-nuclei with set groups of persons is carried out. These groups of persons are particularly exposed to ? radiation. They are employees of spa Lázně Jáchymov, former miners from already closed uranium mines in Příbram and current miners from uranium mines GEAM o. z. Dolní Rožínka. These selected persons are divided according to their workplaces into two groups, i.e. a group of persons without cancer occurrence in the family and a group of persons with occurrence of cancer in their families. The numbers of bi-nuclei cells without micro-nuclei and with micro-nuclei and the kinds of micro-nuclei were determined with all these persons using fluorescence microscope. Expression and comparison of percentages of bi-nuclei cells with micro-nuclei to total number of all bi-nuclei followed and then expression and comparison of proportion of micro-nuclei without centromeres to the number of micro-nuclei of both kinds (with centromeres and without centromeres) with all persons and groups were carried out. Based on the results gained from statistical assessment, it was found that differences between percentages of the two main compared groups of persons did not show higher genomic instability (statistically significant difference) in persons with familiar occurrence of cancer than in persons without cancer in the family. But by comparing the shares of micronuclei without centromeres was proved statistically significant difference between these main groups.
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The system of the safe storing of radioactive waste
NEUMANNOVÁ, Kateřina
We can hardly imagine today{\crq}s modern word of 21st century without usage of nuclear energy and ionizing radiation. We meet them in nuclear energetics, industry, health service and other different fields. Similarly to other human activities even here waste rises {--} radioactive waste which can be dangerous for a man and for the whole environment. Therefore it is very important to deal with it according to existing rules. Radioctive waste rises even in the Czech Republic and that is why an enhanced attention is very necessary here. Therefore I would like to break into these problems as much as I can and I would like to describe these problems in my bachelor work so that everybody is informed about basic information how to deal with radioactive waste in an understandable form. I think that everybody in this country, regardless to their education, should have a basic overview about problems of radioactive waste. I would be very pleased if this bachelor work could help people interested in these problems and if my work is used as an educational material. If readers find new interesting information, my work will be even more useful.
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Health and safety at work with sources of ionizing radiation in healthcare
Pěnková, Jana ; Spirit, Michal (advisor) ; Soušková, Milena (referee)
The aim of this diploma thesis is to analyse health and safety system in department of nuclear medicine in Kolín hospital and evaluate its compliance with czech legislation. The thesis is compsed of four chapters. Chapter One gives a general introduction to health and safety issues and describes most important aspect of general health and safety legislation. Chapter Two explains the basic terms of ionizing radiation and radioactivity and focuses mainly on radiation protection, which is closely linked to the health and safety area. Chapter Three defines the legislative and institutional framework of health and safety in the area of ionizing radiation. This chapter is a starting point for Chapter Four, which analyzes the health and safety system in department of nuclear medicine in Kolín hospital, compares it with legislation requirements and evaluates the compliance.
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