Ce travail de thèse s'inscrit dans le cadre d'un projet de recherche entre le CEA et ARMINES (Centre LGEI/ Ecole des Mines d'Alès). Il vise à améliorer la connaissance des mécanismes physiques se produisant lorsque qu’une nappe de liquide (inflammable et/ou toxique stocké à pression atmosphérique) s’évapore suite à la rupture de son stockage. La démarche expérimentale employée consiste à réaliser un plan d'expériences visant à exprimer le débit d'évaporation initial d’une nappe sous différentes conditions initiales de température de liquide et de sol, sous différentes vitesse d’écoulement, de température d’air et selon différentes épaisseurs initiales de liquide. Les différents flux thermiques échangés entre la nappe et son environnement, la température de la nappe et le débit d'évaporation sont mesurés et quantifiés.Les débits d'évaporation expérimentaux sont confrontés à ceux prédits par les différentes corrélations disponibles dans la littérature. Deux analyses de sensibilité sont également réalisées sur ces corrélations et les résultats confrontés à ceux du plan d'expériences afin de vérifier si les corrélations attribuent le même poids aux différents paramètres expérimentaux que le phénomène en lui-même.Les relevés de température dans l'épaisseur de la nappe mettant en évidence la présence de cellules de convection naturelle est également étudiée. Par ailleurs, la température moyenne de la surface est déterminée à partir des différents flux thermiques échangés entre la nappe et son environnement.A l'aide des résultats obtenus, l'étude de plusieurs éléments a été réalisée: l’écart de prédiction sur les résultats des équations bilan thermique et massique selon la température employée pour les incrémenter, la nette différence de température entre la surface et le coeur du liquide, rarement prise en compte dans les modèles théoriques, le rôle prépondérant de la convection naturelle dans le phénomène d'évaporation.Un dernier chapitre étudie la dispersion de la température de surface (phénomène peu étudié dans la littérature) à l'aide d'une caméra thermique. Des zones de températures homogènes apparaissent alors dans le cas de l'essai mettant en oeuvre un écoulement de cavité au-dessus du liquide. La présence de différentes zones de température implique que la cinétique d’évaporation n’est pas uniforme sur la surface de la nappe. A partir de ces résultats, le coefficient de transfert de matière est étudié en fonction de la régression du niveau de liquide dans le bac et conclut à une diminution non modélisée par les corrélations existantes. / This work belongs to a research project between CEA and ARMINE (LGEI center/ Ecole des Mines d’Alès). It aims at increasing comprehension of physical mechanism generating when a liquid pool (either flammable or toxic parked under atmospheric pressure) evaporates after loss of containment. An experimental design is realized in order to express some characteristics of evaporation phenomena (initial evaporation rate, steady evaporation rate and duration of unsteady evaporation rate) as a function of initial liquid and soil temperature, wind velocity, air temperature and initial liquid thickness. Heat fluxes exchanged between the pool and its environment are either measure or computed.Experimental evaporation rates are compared to those predicted by correlations available in the literature. Two sensitivity analyses are performed and their results are confronted to those from experimental design. It allows determining if the importance of the different experimental parameters is the same from the correlations to the phenomena itself.Temperature measurements in liquid thickness highlight the presence of natural convection cells. Besides, mean surface temperature is computed from measurements of heat fluxes exchanged between the pool and its environment. From the different results, several points are investigated: the shift between heat and mass balance equations according to the temperature employed to compute them the difference between the liquid bulk and liquid surface temperature, barely taken into account in correlations the noteworthy role of natural convection in the evaporation phenomena.A last chapter studies the surface temperature distribution thanks to an infrared thermometer. Homogeneous temperatures areas appear in the case of cavity flows. The presence of different temperature areas implies that evaporation kinematic in not uniform in the whole surface. From these result the mass transfer coefficient is studied as a function of the step height between the top of the cavity and the liquid surface. It concludes to a mass transfer coefficient decrease non modeled by the different correlations in the literature.

El presente trabajo de investigación trata de la influencia de la inclinación de pozas disipadoras en la pérdida de energía en ríos de alta pendiente. Para ello, se tomó como caso de estudio la bocatoma San Pedro (Ayacucho, Perú). Se presenta el modelamiento numérico de la bocatoma en el software de dinámica de fluidos computacional, IBER, con el fin de obtener resultados hidráulicos en la estructura: tirante, velocidad, energía, Froude y tensión de fondo. El principal objetivo es mejorar la eficiencia del funcionamiento de las pozas disipadoras en ríos de alta pendiente. Asimismo, conocer las características hidráulicas del río San Pedro, que representa un flujo de alta pendiente. La metodología empleada fue la recoilación de información del caso de estudio, la cual fue validada con los resultados de los modelamientos en los programas HEC-RAS e IBER. Del mismo modo, se diseñaron 5 bocatomas con pozas disipadoras de distintas pendientes: 0%, 1.52%, 3.04%, 4.56% y 6.08%. Se modelaron en el software IBER y se exportaron los resultados a Excel. Estos modelos numéricos fueron validados mediante el Análisis de Sensibilidad. En consecuencia, se compararon los valores de energía aguas abajo de las distintas pozas propuestas. Finalmente, con los resultados del estudio se concluye que la poza disipadora de 3.04% es la más apropiada para el río San Pedro, pues pierde un 30% de energía más con respecto a la poza horizontal y reduce la velocidad en 4.9% en comparación a la poza de inclinación de 6.08%. / This research work deals with the influence stilling basin slope on energy loss in high slope rivers. Taking as a case study the water intake San Pedro (Ayacucho, Peru). Numerical modeling of water intake is presented in computational fluid dynamics software, IBER, in order to obtain the hydraulic results in the structure: hydraulic depth, velocity, energy, Froude and shear stress. The main objective is to improve efficiency of stilling basins operation in rivers with high slope. Also, know the hydraulic characteristics of the San Pedro River, which represents a high slope river. The methodology used was the collection of case study information, was validated with the results of modeling in the HEC-RAS and IBER programs. Similarly, five dissipation basins of different slopes were modeled: 0%, 1.52%, 3.04%, 4.56% and 6.08%. They were modeled in IBER software, and the results were exported to Excel. These numerical models were validated by Sensitivity Analysis. Consequently, the downstream energy values of the different proposed stilling basins were compared. Finally, the results of the study conclude that the 3.04% slope dissipative basin is the most appropriate for the San Pedro river, as it loses 30% more energy than the horizontal basin and reduces the velocity by 4.9% compared to the 6.08% inclined basin. This proposed stilling basins will feature an alphaizer on the End of the breakwater that will be calculated with Peterka's monograph shown in the bibliography. / Tesis

This diploma thesis deals with storing the spent nuclear fuel and reviewing its safety. The theoretical part analyzes the processes taking place while the fuel is being used, such as fission, isotopic changes, fission gas release, cracking, swelling and densification of fuel pellet. The thesis is also focused on handling the spent fuel and on the way it makes from the reactor, through the spent fuel pool, the transportation, various kinds of storing, till the reprocessing and final deep geological repository. Furthermore, this part of the thesis briefly discusses computing code MCNP, its main characteristics, input files and using. The practical part of the work is focused on creating the model of the spent fuel pool located next to the nuclear reactor WWER 440/V213. This type was chosen, because it is the most used type of nuclear reactor in Czech Republic and Slovakia. With the help of the code MCNP, the multiplication factor of the main configurations of the fuel in the pool was calculated, and then the required safety regulations to ensure sufficient subcriticality, so its safety, were checked. Next, several analysis were performed using this model. These analyses were concerning the temperature of coolant, fuel and the use of various nuclear data libraries. In the future this model can be used to realize new analyses with new kinds of fuels, materials and data libraries.

The subject matter of the assigned project is Aquapark Brno – located near Lužánky. The subject is an architectural study elaboration of an aquapark adjoining the current swimming pool building which was established in 1979. This building facility is used primarily by professional swimmers and sportsmen for it contains the only 50 meters long swimming pool with a tribune in Brno. The aim of the project is to create new areas and pools for visitors with recreational intentions and therefore to widen the possibilities for free time activities. The project also deals with restoration of a 16 meters long training pool in the existing building, creation of inner and outer aquapark areas and adding exercise and dance halls as an extension to the existing fitness center. Another goal of this project was to make the pedestrian access to the area more pleasant which is achieved by creating an underground parking space in the area of the existing building’s frontal space and also by designing a footpath leading from the remote side of the excessively frequented Sportovní street. The primary aim of the project is an operational connection of the existing and the new building by a central building and also preventing an eclipse of the area by integrating the building in the area’s hillside. The advantage of the project is the presence of relaxation facilities and sports areas. The project completes the sporting environment of the area which makes it an attractive locality for a family recreation.

This master’s thesis is focused on the design of electric steam generator for superheated steam. Using heating cartridge is the easiest way how to make a saturated or superheated steam. This device is part of gasification reactor, which is used for experimental purposes. The thesis includes schematic involvement of technology. Technology contains evaporator and superheater. The evaporator is calculated as pool boiling. The superheater is design for steam flowing through heating cartridge bundle. At the end of the thesis are made projection drawings, which are based on the calculations.

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This thesis covers brand new detached indoor pool with one underground and one above ground floor, which is designed for a maximum capacity of 120 people, with two swimming pools, a children's swimming. The building is designed with a flat rectangular roof insulation. Envelopes are ventilated, insulated, bearing part consists of reinforced concrete. The pool hall make up the majority of the building envelope glass facade. Facilities for employees is located on the first basement floor. All technologies for cleaning pool water, air conditioning, boiler, facilities for maintenance are located on the first basement floor. Chimneys are stainless steel, placed on the outside of the building. The finish floors are ceramic tile. Pool bath is designed as a so-called white bathtub. The supporting structure of the ceiling above the pool hall beams are post-tensioned concrete.

This thesis deals with the risk analysis and risk management of a construction project, their detailed characteristics and classification. In the practical part, knowledge and findings from the theoretical part are applied to a project aimed at the reconstruction and completion of an indoors swimming pool in the town Kuřim. In the course of the risk analysis assessment, important information on the project were given, furthermore, risks were identified, the intensity of their impact and likelihood of their development was established, and measures to reduce the risks were recommended.

Newly built Wellness hotel. The building is partially basement. The building has three parts. The central part is made of reinforced concrete skeleton and has five aboveground floors. This part serves as the main entrance hall and staircase. The side tracts have four aboveground floors and their support system is a transverse wall, brick, from the system Porotherm. In the basement there is a swimming pool and hotel facilities. There is located a restaurant too. On the second floor there are rooms, a gym and services. On the top floor there are only hotel rooms. The building is based on thecontinous footings. Roofing is made arched trusses.

This thesis was prepared as an architectural study. In front of his graduate-seminar was a study on urban concept and the building Aquapark Brno - Zidenice hillside snakes. This thesis deals with the extension of the complex of Roman baths and sauna world. This is a two-storey building without a basement cubic shape. The proposal emphasizes the functionality of the service, interior design of the building and the overall expression