Browsing by Author "Stará, Marie"
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- ItemSampling robot for primary circuit pipelines of decommissioned nuclear facilities(Elsevier B.V., 2020) Starý, Michal; Novotný, František; Horák, Marcel; Stará, MarieNuclear power plants, as one of the cornerstones of today's global and, most importantly, European energy sector, place considerably high demands on all stages from design and construction, through operation and control, to safe decommissioning at the end of the facility's life. A relatively large decommissioning process is underway in Europe, which will increase over the coming decades. This process of decommissioning nuclear facilities is closely linked to the objective assessment of the efficiency of decontamination processes. The present paper deals with techniques and technologies for obtaining samples from the hard-to-reach inner surface of the primary circuit of a nuclear reactor. Sampling by a service robot fitted with sampling probes is assumed to be performed under relatively dry conditions, i.e. before the application and after the discharge of the decontamination solution. The basis of the electro-pneumatic robot for default pipes with a diameter of 500 mm is an eight-wheel mobile platform with self-stabilizing capability thanks to inclined wheels. The robot is equipped with a pair of unique sampling probes and a fixing arm to position the robot in the pipeline during the sampling. The basis of the article is the technical solution of the service robot, with an emphasis on the functioning and efficiency of the sampling probes. The presented comprehensive system constitutes a proven knowledge base for the decommissioning of nuclear power facilities.
- ItemSummary of the properties and benefits of glass mechanically frosted with an abrasive brush(2019-05-10) Starý, Michal; Novotný, František; Horák, Marcel; Stará, Marie; Hotař, Vlastimil; Matúšek, OndřejModifications to the surface structure of float glass are among the most common application procedures of a given material used in many industries, especially in the building industry and housing architecture. The aim is to reduce the transparency of otherwise clear soda-lime glass. Typically, the chemical technology of acid-etching or the mechanical technology of sandblasting are used for this purpose. The application of both of these methods has its advantages, but it is also accompanied by a number of negative aspects, including environmental impacts. Due to the development of modern methods and materials, a new, advanced and above all ecological technology of mechanical glass frosting has been developed using an abrasive roller brush with composite filaments. The introductory chapters of this paper characterize the processes of glass surface treatment using this technology. Subsequent chapters provide an analytical summary of the results of extensive research of the mechanical, optical and practical properties of brush-matted glass. Knowledge of these properties determines the application potential of the given method and provides the initial data for predicting the behaviour of the selected frosted products. In the conclusion, the results are thoroughly evaluated and discussed in comparison with other existing products.