Search Results - "Thorium"

On this paper it is presented the main physics features of the thorium as a nuclear material and a security analysis due to insertion of ThO2 in a PWR nuclear reactor fuel by the determination and assessment of the sensitivity coeficients through the Standardized Computer Analyses for Licensing Eval...

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The article discusses the features of the deep and crustal structure of the Golovanevskaya zone, the geochronological sequence of the main stages of its formation. The characteristic of thorium-uranium ore occurrences and deposits is given; and the main stages of their formation. The stages of succe...

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Thorium is a naturally occurring radioactive element that is widely distributed in the crust of the Earth. This element is very common in mineral formations in regions with high levels of natural radioactivity, therefore, its determination in environmental samples is important. Thorium isotopes (228...

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This article analyzes the SWOT Matrix for the implementation of the AP-Th1000 reactor with thorium fuel, aiming at a future replacement of the current nuclear reactors that use uranium as fuel by thorium. There was a need for an in-depth study of the national and international literature linked to t...

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The need for energy by modern society is increasing. On the other hand, it is necessary to reduce costs and environmental impact. In this perspective, the recovery of uranium present in industrial waste from the processing of naturally occurring radioactive material (NORM) appears as a possible comp...

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This study presented the recovery of uranium oxide and thorium oxide from aluminothermic slag from the metallurgical processing of columbite – a niobium/tantalum mineral with the presence of U3O8 and ThO2 – from a mining-industrial facility. The methodology consisted of sampling, comminution, and le...

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NORM minerals generate, after metallurgical processing, radioactive slags that can be controlled by CNEN. Thus, it is necessary to establish a reprocessing route to make the material exemption. The route necessarily passes through the characterization of the slag from its physical properties. In thi...

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One of the great advances in the current evolution of nuclear power reactors is occurring in India, with the Advanced Heavy Water Reactor (AHWR). It is a reactor that uses thorium as part of its fuel, which in its two fueling cycle options, in conjunction with plutonium or low enriched uranium, prod...

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This study investigates the activity concentrations of naturally occurring radionuclides, particularly 238U, 232Th, and 40K, in granitic rocks from the Gabal Abu Garadi region in Central-Eastern Egypt. Using high-purity germanium gamma-ray spectrometry, these radionuclides were quantified and evalua...

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Introdução: A  radioproteção tem como foco a proteção dos seres humanos e seus descendentes e a proteção do meio ambiente. A proteção ambiental sempre foi feita de forma indireta por meio da proteção do ser humano no meio ambiente. Essa abordagem antropocêntrica tem várias deficiências. Em sua recom...

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Studies indicate that the presence of uranium and thorium radionuclides in the environment are of great importance in monitoring radiation levels. Humans can have a direct or indirect exposure. The radiological impact for the members of the population living in Angra dos Reis - RJ was evaluated usin...

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In the wake of climate change and global warming, various alternatives are being considered as a potential replacement for fossil fuels. Despite often being overlooked, nuclear power offers many benefits as a low-carbon energy source. Being a thermal power plant, nuclear power can generate en...

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This work refers to determination of thorium and uranium isotopes in the mining lixiviation liquor samples. The analytical procedure involves sample preparation steps for rare earth elements, thorium and uranium separation, besides alpha spectrometry analysis of the isolated radionuclides. An isotop...

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Recycling waste nuclear fuel through the production of mixed oxide (MOx) fuel allows for sustainable management of natural nuclear resources. With the aim of reducing the number of steps required for recycling U and Pu, the possibility of precipitating them directly from the organic phase (also refe...

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A classical molecular dynamics simulation of cation diffusion in isolated crystals (U<i>_x</i>Pu<i>_y</i>Th_{1−<i>x</i>−<i>y</i>})O₂ bounded by a free surface was pe...

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The Molten Salt Fast Reactor (MSFR) represents a significant innovation within the Generation IV nuclear reactor systems, distinguished by its use of molten salt as both fuel and coolant. This study presents a methodology for performing steady-state coupled neutronics and thermal-hydraulics (TH) ca...

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The paper is devoted to the question of natural radionuclides (40K, 238U, 232Th) distribution in the soils on the territory of New Moscow. Based on the processing of the results of aero-gamma-spectrometry and analysis of extensive cartographic material (geological, soil, neotectonic maps, satellite...

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