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[en] With cooperation of the International Atomic Energy Agency (IAEA), thermal-hydraulic calculations were carried out for conversion of the IAN-R1 Reactor from MTR-HEU fuel to TRIGA-LEU fuel. To establish thermal-hydraulic calculation and analysis research in Colombia, this program was carried out and included training, acquisition of hardware, software and natural convection flow calculations for the TRIGA IAN-R1 research reactor operating at 100 kW. The purpose of the study is to validate the steady state thermal hydraulic analysis that has been carried out by means of the NATCON code. This paper presents the results of the maximum axial temperature distribution for fuel, clad, and coolant. In addition, the Bernath critical heat flux with pool water temperature as a parameter is presented.
[en] This paper presents a historical description of the implementation process of the Low Temperature thermochronology laboratory at the Colombian Geological Survey. The laboratory is focused on thermochronological dating of apatites and zircons with the fission track method. Here we explain the applied methodology, the results of the inter-calibration process performed in collaboration with the fission-track laboratory at ISTerre Joseph Fourier University and the internal inter-comparison of the SGC laboratory analysts. Furthermore, a viability study and irradiation conditions for fission track analysis in the nuclear reactor IAN-R1 is presented, in order to demonstrate the technical facilities, precision and reliability of the results obtained in the SGC laboratory to the scientific community.
[en] We carried out a chemotopological study of two groups of positron emitter radionuclides of current and potential use in positron emission tomography (PET) diagnostic imaging. The aim was to look for potential β+ radionuclides not yet in use for PET imaging, taking into account the similarities of these radionuclides with radionuclides already used in PET imaging. The similarity was studied through physical, physico-chemical, dosimetric, quantum and nuclear properties of the radionuclides. We applied cluster analysis (two similarity functions and three grouping methodologies) and generated six dendrograms. One dendrogram was selected in each group, which was used to build up a basis for a topology. From the calculation of topological properties of several subsets of interest, we propose β+ radionuclides 47V, 48V, 63Zn, 70As, 90Nb, 106Ag, 115Sb, 116Sb, 120Sb, 130Cs, 134La and 140Pr, as potential new radionuclides of use in PET imaging. (author)