Analysis of iron-rich hydrochloric acid solutions for …
Analysis of iron-rich hydrochloric acid solutions for uranium, thorium, rare-earth elements and other heavy metals Beena Sunilkumar1*, M. Krishnakumar2 and A. A. Patwardhan1
THE DATING OF ROCK ART AND BONE BY THE URANIUM-THORIUM …
THE DATING OF ROCK ART AND BONE BY THE URANIUM-THORIUM METHOD. September 2022. Rock Art Research 39 (2):195-204. Authors: Robert G. Bednarik. Hebei Normal University.
Thorium's Long-Term Potential in Nuclear Energy
A four-year IAEA coordinated research project focused on the possibilities of developing thorium-based nuclear energy, examining the benefits and the challenges of using …
(PDF) On-Line X-Ray Fluorescence Analysis of Uranium and Thorium …
Potential applicability of industrial XRF analyzer CON-X series is shown for continuous measurement of uranium (U) and thorium (Th) in various materials (rutile and zircon sands, phosphate rock ...
Analysis of Benefits and Risks of Thorium and
The condition that the neutron multiplying properties of the fresh uranium-thorium fuel should be the same as those of the regular uranium fuel (with ... Gurin, A.V., Kovalenko, N.A., Schepetina, T.D. et al. Analysis of Benefits and Risks of Thorium and 233 U Introduction in the VVER-1200 Fuel Cycle in the Fusion-Fission Reactor System ...
Evidence and uncertainty for uranium and thorium …
Analysis of igneous rock, common granite and Cornwall granite (hydrothermal mineralisations) shows for uranium concentrations of 3.7, 4.0 and up …
A simple-rapid method to separate uranium, thorium, and …
Uranium-series dating techniques require the isolation of radionuclides in high yields and in fractions free of impurities. Within this context, we describe a novel-rapid method for the separation and purification of U, Th, and Pa. The method takes advantage of differences in the chemistry of U, Th, …
Abundances of Uranium and Thorium Elements in Earth …
In particular, we are able to perform geoneutrino spectroscopy, separating the uranium and thorium contributions, thus probing the abundance of the major heat producing elements. In the following sections, we outline our Earth composition model, provide the details of the analysis and discuss the implications for these results, …
Determination of uranium, thorium and potassium activity …
Soil samples were collected from six different locations in Araba valley, situated between Aqaba port and Dead sea. The samples have been analysed by using gamma-ray spectrometry. From the measured gamma-ray spectra, activity concentrations are determined for (238)U, (232)Th and (40)K. The mean acti …
Neutron Activation Analysis – Another Approach to Uranium and Thorium
DOI: 10.2533/CHIMIA.2013.828 Corpus ID: 101529833; Neutron Activation Analysis – Another Approach to Uranium and Thorium Analysis in Environmental Samples @article{Zehringer2013NeutronAA, title={Neutron Activation Analysis – Another Approach to Uranium and Thorium Analysis in Environmental Samples}, …
Determination of Uranium, Thorium and Potassium …
The Spectral gamma ray data includes uranium, thorium and potassium that logged from 5447 ft. to 5653 ft. depth of the well. The analysis includes values of uranium (U) and thorium (Th) in ppm, where potassium (K) is recorded in percentage. The values of potassium and thorium are plotted on (clay type diagram of Schlumberger).
Comparison of four analytical techniques for …
Published: 31 October 2019. Volume 322, pages 1975–1982, ( 2019 ) Cite this article. Download PDF. Entesar M. El Gammal & Sherien H. Ahmed. 346 Accesses. 4 Citations. …
Measuring activity of 235, 238U, 232Th and 40K in …
In addition to the decay chains of uranium and thorium, 40K was also determined using epithermal neutron activation analysis to determine total potassium content and then subtracting out its isotopic contribution. The radioactivity of the 235, 238U and 232Th isotope decay chains for geological samples can usually be assumed to be in …
Determination of uranium and thorium in complex samples …
In one of the procedures, uranium and thorium bind directly from the samples of drinking water and seawater on the column filled with TRU resin from 0.5 mol L(-1) HNO(3) in a water sample. After binding, thorium is separated from uranium with 0.5 mol L(-1) HCl, and uranium is eluted with deionised water.
Monitoring of ultra-trace uranium and thorium in six-grade …
The natural radioactive elements uranium (U) and thorium (Th) in atmospheric environment should be given attention, and their particle size distribution and concentration are important for estimating their hazardous effects to the human body. The concentrations of U and Th in 360 aerosol samples collected using six-stage aerosol collector from ...
A comparison of analytical methods for determining …
Abstract. Three different methods for determining uranium and four for determining thorium in an apatite ore, black schist and mill tailings are compared. The …
Comparing the environmental impacts of uranium- and thorium …
This analysis considers four representative fuel cycle options that are intended to encompass major categories of possible implementations of fuel type and recycle. To this end, fuel cycles that employ uranium/plutonium and thorium/uranium are considered, including those that employ varying extents of recycle.
EPA Method EMSL-33: Isotopic Determination of Plutonium, Uranium…
EPA's Selected Analytical Methods for Environmental Remediation and Recovery (SAM) lists this method for confirmatory analysis of plutonium-238 and plutonium-239 in drinking water samples. EPA Method EMSL-33: Isotopic Determination of Plutonium, Uranium, and Thorium in Water, Soil, Air, and Biological Tissue (pdf) …
Comparative analysis on small modular reactor (SMR) with uranium …
The thorium cycle excels with an initial neutron multiplication factor of 1.134, almost the same as uranium (1.129). Additionally, the thorium cycle boasts superior neutron flux and Conversion Ratio (CR) in the thermal neutron energy range, enhancing sustainability with an average CR of 0.765, compared to 0.574 and 0.692 for uranium …
Automated flow systems for total and isotopic …
Fully automated lab-on-valve-multisyringe flow injection analysis-ICP-MS system: an effective tool for fast, sensitive and selective determination of thorium …
Determination of ultra-trace levels of uranium and thorium …
Ultra low-levels of uranium and thorium in electrolytic copper were determined. • Radiochemical neutron activation analysis was used. • Uranium was determined via its induced nuclides U-239 and Np-239. • Thorium was determined via its induced nuclide Pa-233. • Separations were done with solvent extraction and extraction …
Preconcentration techniques for uranium(VI) and thorium…
The developed method has been successfully applied for the analysis of LREE, uranium and thorium in a variety of silicate rocks. Uranium, thorium, plutonium and americium were preconcentrated onto TRU(TM) resin (Elchrom) prior to elemental separation by extraction chromatography and α-spectrometric determination [25]. The …
Uranium, thorium and potassium insights on Campania …
Uranium, thorium and potassium are distinguished in different compartments of the environmental media according to the inputs, the fate and the distribution patterns that occur in the ecosystems. ... The data analysis under a compositional perspective demonstrated to gain a more accurate interpretation of …
Burnup Analysis of Thorium-Uranium Based Molten Salt …
When thorium-uranium-plutonium fuels were added into a F-Li-Be molten salt zone with a component of 71% LiF -2% BeF2 -13.5% ThF4 -8.5%UF 4-5% PuF3, the appropriate blanket energy multiplication ...
Radiochemical technique optimization to measure uranium and thorium …
A common advanced radiochemical technique is the use of the AG® 1-X8 anion exchanger, Cl 2− form (from Bio Rad), to separate uranium and/or thorium from a sample by ion exchange. This method is used to separate elements by chemical elution from an ion exchange column via a precipitate of substances (co-precipitation), with Nd …
Use of combined solvent extraction-electrodeposition …
A method combining liquid-liquid extraction and electrodeposition procedures is carried out to determine isotopic composition of uranium and thorium in technical wet phosphoric acid, phosphate rock and phosphogypsum leachates, by α -particle spectrometry. Extraction experiments are performed with diethylether from 5.57 M …
Radiochemical technique optimization to measure …
This method is used to separate elements by chemical elution from an ion exchange column via a precipitate of substances (co-precipitation), with Nd 3+ as a thin …
Sequential extraction procedure for …
Naturally occurring radionuclides of uranium, thorium, radium, lead and polonium were determined in bushes and trees and in the smoke from summer forest fires. ... Radioactivity analysis of ...
Abundances of Uranium and Thorium Elements in …
We perform geoneutrino spectroscopy to estimate the uranium and thorium individual contributions by the means of an unbinned maximum-likelihood analysis based on the event rate, …
Instrumental neutron activation analyses of uranium and thorium …
Although a number of the uranium and thorium progenies have been determined, there is, still, the need to determine some other members of the natural series radionuclides. To assess the environmental impact of radioactive contamination of ecosystems, information on the source term is essential. ... determined from spectrum …
