Radiochemical technique as a tool for determination and characterisation of El Sela ore grade uranium deposits

Okasha, Sahar A.; Faheim, Abeer A.; Monged, Mohamed H. E.; Khattab, Mahmoud R.; Abed, Neveen S.; Salman, Aida A.

doi:10.1080/03067319.2020.1863388

Cited by 18 publications

(5 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…0.5 M of HNO3 was passed through the column to eluted Uranium. The eluted U was evaporated to dryness in a crystallizing dish using 1 mL of concentrated HCl (Figure 1) [32]. Distilled water was used as a blank sample, as it was free as possible of chemical or radioactive impurities.…”

Section: Sample Digestion Separation and Purificationmentioning

confidence: 99%

“…The 238 U was determined via 234 Th (63 and 92 keV), 234m Pa (766 and 1001keV) and 230 Th (67.7 keV) [19]. 234m Pa can be successfully used when measuring samples with medium to high uranium concentration [32]. The 93 keV peak suffers overlap of 228 Ac 93 keV X-ray peak.…”

Section: Gamma Spectrometric (Hpge-detector)mentioning

confidence: 99%

“…Some of them are based on precipitation, liquid-liquid extraction, ion exchange, and chromatography[29]. Spectral analysis was obtained by means of Canberra Genie 2000 software for Acquisition and Analysis.In the present work, the activity concentration of uranium isotopes in different environmental samples using extraction chromatography with TOPO [30, 31] and UTEVA[32] were obtained and compared to establish an accurate and rapid method in the Central…”

mentioning

confidence: 99%

See 2 more Smart Citations

Determination of Uranium Isotopes in Environmental Samples Using Different Analytical Techniques: A Comparison

Awaad

Ahmed²,

Shabasy³

et al. 2022

Egypt. J. Chem.

View full text Add to dashboard Cite

Different analytical methods for different environmental samples (rock, soil, sediment, plant, waste water, ground water and tap water) which have low activity concentrations are developed for the determination of uranium isotopes to be assured of no contamination or pollution of the environment. Using of non-destructive method based on gamma spectrometer and destructive analysis based on alpha spectrometer. Choice of an accurate and precise technique to get better performance and quality is essential for the results assessment and improvement. A set of different matrices of IAEA reference certified samples were used for method verification. Two separation techniques for 238 U, 234 U and 235 U were used; i) UTEVA extraction chromatography which achieved recoveries higher than 50 %, ranged between 59 and 79 % and ii) TOPO solvent extraction which achieved a chemical recovery lower than that obtained by UTEVA for the same matrices ranged from 26 % and 55 %. From the obtained results a significance difference was shown between UTEVA and TOPO techniques.

show abstract

Section: Sample Digestion Separation and Purificationmentioning

confidence: 99%

Section: Gamma Spectrometric (Hpge-detector)mentioning

confidence: 99%

mentioning

confidence: 99%

See 1 more Smart Citation

Determination of Uranium Isotopes in Environmental Samples Using Different Analytical Techniques: A Comparison

Awaad

Ahmed²,

Shabasy³

et al. 2022

Egypt. J. Chem.

View full text Add to dashboard Cite

show abstract

“…It was shown that solar chimneys are a practical approach to saving energy for residential buildings in transitional seasons in China's hot summer and cold winter areas. Danesh [11], Okasha, et al [12], Abed, et al [13], Taha, et al [14], and Ebyan, et al [15] studied the effect of using solar chimneys to reduce the heating load in cold climates in many countries. The buildings were adapted to the local climate conditions using sustainable architectural techniques and materials; thereby, the highest level of climatic comfort was provided.…”

Section: Introductionmentioning

confidence: 99%

Investigation of natural ventilation using a solar chimney in various solar cases

Abdel-Baky,

Eaid,

El-Khaldy

et al. 2024

ijirss

View full text Add to dashboard Cite

The high cost of conventional energy production, its uses, and its negative environmental impact led scientists to look for many ways to solve this problem. The main issues are environmental pollution, the high cost of air treatment, and the high cost of energy production. An essential solution is using renewable energy instead of traditional energy (petroleum, coal, natural gas, and electric power). As it is a permanent energy source, it causes no air pollution and is cheaper. In this work, an experimental study was conducted on using solar energy as an energy source in the natural ventilation of buildings and the factors affecting this ventilation. A solar chimney has been installed with and without storage materials to store energy for natural identity during sunrise and after sunset. In this work, the difference in air density with different temperatures is the main factor for energy production, which leads to a change in the airspeed (natural ventilation). The study indicates that indoor air velocity can remain higher than ambient air velocity during the day and at night for several hours. This reduces demand and dependence on conventional energy usage, which leads to cost reductions and a reduction in air and environmental pollution.

show abstract

“…Due to the substantial generation of radioactive materials during the operation of the reactor, the ensuing interaction between these radioactive substances and environmental media is predicted to yield consequential adverse effects [1][2][3], thereby necessitating a meticulous scrutiny of reactor safety. The reactor system encompasses a plethora of physical processes, such as neutron transport, flow heat transfer, and structural deformation, which all intricately interact with one another and ultimately govern the reactor's state.…”

Section: Introductionmentioning

confidence: 99%

Coupled Monte Carlo and Thermal-Hydraulics Modeling for the Three-Dimensional Steady-State Analysis of the Xi’an Pulsed Reactor

Jiang,

Xu,

et al. 2023

Energies

View full text Add to dashboard Cite

The Xi’an Pulsed Reactor (XAPR) is characterized by its small core size and integrated fuel moderator structure, which results in a non-uniform core power and temperature distribution. Consequently, a complex coupling relationship exists between its core neutronics and thermal hydraulics, necessitating the assurance for the operational safety of the XAPR. To optimize the experimental scheme in the reactor, a refined three-dimensional steady-state nuclear-thermal coupling analysis is imperative. This study focuses on investigating the coupling calculation of a three-dimensional steady-state neutronics and thermal-hydraulics model for the XAPR by utilizing an open-source multi-physical coupling framework known as Cardinal. The neutron transport equation is effectively solved using OpenMC, while a three-dimensional heat conduction model is employed to compute the heat conduction of the fuel elements. Furthermore, a parallel multi-channel model is utilized to determine the fluid heat transfer. The research is centered on the XAPR, whereby Monte Carlo and thermal-hydraulics coupling calculations of the core under steady-state full-power conditions are conducted, specifically at an operational capacity of 2 MW. The results demonstrate a strong agreement between the simulation and experimental outcomes. The maximum temperature recorded for the thermometric fuel element in the XAPR is 795.1 K, with a deviation of approximately −5.7% from the measured value. Moreover, the outlet fluid temperature of the thermal channel is observed to be 360 K, exhibiting a deviation of around −2.7% from the measured value.

show abstract

Radiochemical technique as a tool for determination and characterisation of El Sela ore grade uranium deposits

Cited by 18 publications

References 23 publications

Determination of Uranium Isotopes in Environmental Samples Using Different Analytical Techniques: A Comparison

Determination of Uranium Isotopes in Environmental Samples Using Different Analytical Techniques: A Comparison

Investigation of natural ventilation using a solar chimney in various solar cases

Coupled Monte Carlo and Thermal-Hydraulics Modeling for the Three-Dimensional Steady-State Analysis of the Xi’an Pulsed Reactor

Contact Info

Product

Resources

About