[en] This meeting presents results of research developed and in development by the graduation and pos-graduation students in Nuclear Engineering: neutronic analysis of nuclear systems; nuclear fuel cycle; safety of nuclear power plants; thermal and thermal-hydraulics analysis of nuclear systems etc; Radiation Sciences: radiation application in industries, biomedical area, environment and radiation protection and dosimetry; nuclear instrumentation etc; and Energy Engineering: analysis and planning of energy systems; exergetic analysis, energy and environment; renewable and no renewable energy sources

[en] Studies are being carried out looking for technologies for a compact, robust and affordable reactor that aims to reduce the size, cost, and complexity of a fusion reactor installation. One promising fusion reactor underway at the Massachusetts Institute of Technology (MIT) is the Affordable Robust Compact Reactor (ARC). This reactor uses high-temperature superconductors (HTS), which allow the generation of large magnetic fields on the shaft and therefore reduce its size. The fusion reactor ARC operates using the same deuterium-tritium (DT) fusion reaction of the International Thermonuclear Experimental Reactor (ITER) reactor, whose neutron energy produces about 14.1 MeV, these neutrons enhance the fission probability in Minor Actinides. The Department of Nuclear Engineering (DEN/UFMG) has been working on studies of hybrid systems based on fusion-fission systems based on ITER with the insertion of a transmutation layer. Therefore, the transmutation layer works in a subcritical state, and it is loaded with reprocessed nuclear fuel including Minor Actinides (MAs), which could increase their probability of inducing transmutation by fission with high-energy neutrons. Therefore, this work aims to investigate the neutron flux variations over the ARC reactor's different components. For this study, three systems have been studied ARC1, ARC2, and ARC3. They were simulated using the Monte Carlo N–Particle Transport eXtended method (MCNPX), the ARC1 represents the original compact reactor model, ARC2 is a single homogenized transmutation layer, and ARC3 considers two fuel layers. The results analyzed the best position for the insertion of a transmutation layer inside ARC1. On the other hand, the models ARC2 and ARC3 made it feasible to understand the variations of the neutron flux after the insertion of the transmutation layer under two different simulations. (author)

[en] This work aims to verify the gamma attenuation of different frozen samples compared to samples at room temperature. The gamma attenuation analysis of the samples was carried out using gamma spectroscopy using the scintillator detector Sodium Iodide doped with Thallium, NaI (Tl). The results obtained for the analyzed samples of carioquinha beans and yams indicate a compatibility of gamma attenuation in the frozen samples when compared to the respective ones at room temperature. Thus, the results indicate that it is valid to assume that samples can be stored frozen in the laboratory and their spectroscopy can be carried out without corrections on samples still frozen as they do not present significant changes in the gamma attenuation provided by the sample, that is, the number of counts is maintains within an acceptable level of discrepancy by being within the margin of error

[en] Climate change and respiratory diseases from pollution, in addition to the scarcity of non-renewable energy sources, have raised society's attention to the use of biofuels. Thus, sugarcane bagasse becomes a contributor to the production of renewable energy and a source of research on cellulosic ethanol (2G) production. Containing about 40% of cellulose, sugarcane bagasse is currently destined for burning to produce energy for the sugar and ethanol industry. However, it can be used for nobler purposes such as the production of cellulosic ethanol, increasing the Brazilian capacity to generate clean and renewable fuels. The objective of this work is to analyze the applicability of gamma radiation as a pre-treatment of sugarcane bagasse for later use in the production of biofuels, such as ethanol. Sugarcane bagasse samples were irradiated with pre-fixed doses in a range of 100 kGy to 750 kGy using the Multipurpose Panoramic Irradiator Category II from the Gamma Irradiation Laboratory located at CDTN, Brazil. After irradiation, some analyzes were carried out on the samples, such as color and texture, formation of soluble sugars, and decline in crystallinity factor that help in the subsequent enzymatic hydrolysis to produce cellulosic ethanol. (author)

[en] The objective of this work was to present the Improvement Course in Technological Radiology as a alternative strategy to provide practical experience for trained professionals who already work or intend to work directly with health imaging technologies. This study consisted of field research, descriptive, qualitative, case study type. The chosen scenario was the Improvement Course in Technological Radiology – Improvement Modality - Professional Training, in a public teaching hospital in Southeast Brazil

[en] This work consisted of a bibliographical research based on data collection in articles, books published at the National Cancer Institute -INCA, Brazilian College of Radiology - CBR, Brazilian Association of Dental Radiology -ABRO, Hospital Israelita Albert Einstein and related websites. Result: Depending on the number of image acquisitions by radiodiagnostic devices and their parameters used, it is possible to notice an increase in the dose to which patients are subjected, in contrast, a decrease in the number of exams necessary to reach the 1Gy threshold, approaching even more so from Acute Irradiation Syndrome. Conclusion: It was observed that even if there was an increase in dose to the patient resulting from the number of image acquisitions by radiodiagnostic devices and their parameters, it would still be very far from the dose that would be necessary for there to be mild symptoms of Acute Syndrome. Radiation

[en] The objective of this work is to evaluate the digital radiography technique for Double View Double Wall (PDVD) of weld beads, regarding the ability to visualize defects. For comparison purposes, μCT of the same specimens was performed, making it possible to verify how many defects the digital radiographic technique was unable to identify

[en] The aim of this study is to carry out an analysis of the behavior, at graduation level, of an infinite plate reactor in two energy groups equipped with a reflector. Thus, the present work will present the modeling and numerical resolution of the neutron diffusion equation for the aforementioned case, developing an algorithm for the finite difference method for calculating the parameters of interest, such as the neutron flux and the factor effective multiplication of the reactor. After that, some comments and conclusions will be made about the reactor's behavior, based on the calculated values

[en] The objective of this work was to compile studies of natural radioactivity in Belo Horizonte and identify the relevance and potential for continuing these studies. To this end, published works that used the metropolitan area of Belo Horizonte, Brazil - RMBH as an object of study of natural radioactivity were reviewed and analyzed. The selected research covered several locations focusing on gamma and alpha radiation present in soil, rocks, air and water. The analysis methods used electret ionization chamber detectors, AlphaGuard, CR-39, Doseman PRO, RAD7, alpha spectrometer and gamma spectrometer. The selected works confirm the potential of the Belo Horizonte region for studying natural radioactivity and its relevance, as well as suggesting the continuation of related studies, since determining the origin of radon and the presence of natural radionuclides can contribute to the optimization of measurements of mitigation. As the studies themselves suggest, the high activities found were part of the data collection of a radiometric study and were not intended to assess the health risk of the city's population.

[en] The present work aims to use a convolutional neural network algorithm to assist in evaluating the quality of weld beads. The work methodology consists of three stages: pre-processing, a stage in which the images of the learning weld beads are modified to be the input neurons; development, the moment in which the neuronal architecture is structured; and post-processing, a phase in which the model is tested using precision, recall, F1 metric and accuracy metrics. The results showed an accuracy greater than 90% for discontinuity detection as well as good precision and recall results