Journal of Radioanalytical and Nuclear Chemistry This is an RSS file. You can use it to subscribe to this data in your favourite RSS reader or to display this data on your own website or blog.

Influence of Ba concentration on Ra and 210Pb extraction from aqueous samples using EMPORE ® radium RAD disks
AbstractThe separation procedure for Ra isotopes and210Pb from water using the EMPORE ™ radium RAD disks is very quick and convenient. However, higher levels of the chemically similar Ba in the water at least partly prohibit the uptake of Ra and210Pb, hampering the correct determination of these radionuclides. This investigation shows that the decrease of extraction yield in dependence of the Ba mass is much slower for Ra than for210Pb: With a Ba content  ≤ 1 mg in the water sample,226Ra could be separated completely,210Pb, however, showed a decreasing recovery already at 0.1  mg Ba addition. (Source: Journal of ...
Source: Journal of Radioanalytical and Nuclear Chemistry - November 11, 2023 Category: Nuclear Medicine Source Type: research

Sorption of Cs, Sr, and Co from a solution by a composite sorbent (ClSZ) based on zeolite depending on the activation temperature
AbstractStudy of the influence of zeolite activation temperature on the sorption of a mixture of remove radionuclides Cs, Sr, Co. The activation temperature ranged from 150 to 450  °C. It was found that temperature activation did not lead to changes in clinoptilolite structure. After thermal activation, in all the considered temperature ranges, the sorption properties of clinoptilolite decreased by 15%. For composite sorbents, activation at 150 °C was the most effective. In this case, composite sorbents exhibited complex interactions with the mixture of radionuclides. Cs sorption decreased by 7%, Sr sorption increased ...
Source: Journal of Radioanalytical and Nuclear Chemistry - November 10, 2023 Category: Nuclear Medicine Source Type: research

Comparison of niobium-93m results obtained by two independent destructive analytical procedures and measured by low energy gamma spectrometry and liquid scintillation counting
This article presents two newly developed radiochemical procedures for the destructive analysis of niobium plates irradiated in the core of water-water energetic nuclear reactor (WWER), as well as determination of the specific activity of the generated during the irradiation metastable isotope93mNb. The procedures were developed and tested using standard samples containing93mNb and94Nb. Measurements were made by low energy gamma spectrometry (LEGS) and liquid scintillation counting (LSC) and the obtained data were verified by interlaboratory comparison. All the results were compared with the calculated ones to confirm and ...
Source: Journal of Radioanalytical and Nuclear Chemistry - November 10, 2023 Category: Nuclear Medicine Source Type: research

Whole process establishment of carrier-free 177Lu production: from small-scale production to pilot-scale production
AbstractIn this research, whole process of small-scale and pilot-scale carrier-free177Lu production have been developed and curie-level177Lu was achieved. Additionally, the methodology of product key quality control inspection has been developed and verified, the control standard has been established. Key indicators of the product have met or exceeded the requirements of the European Pharmacopoeia. Up to date, about 30  Ci carrier-free177Lu product has been obtained based on this development. The carrier-free177Lu obtained in this research has been used in nearly 20 trial parties including units for drug R& D and clin...
Source: Journal of Radioanalytical and Nuclear Chemistry - November 10, 2023 Category: Nuclear Medicine Source Type: research

Method to prevent accidental ruthenium volatilization from high-level liquid waste using alkaline earth hydroxide
AbstractWe investigated a method to prevent RuO4 formation from a heated high-level liquid waste (HLLW) in a severe accident in a reprocessing facility. When the alkali or alkaline earth hydroxides were added in excess of the point of neutralization of HLLW, the amount of RuO4 released was significantly suppressed to less than 1% of that without hydroxide addition. Alkaline earth hydroxides would be more suitable for actual use, because alkali hydroxides enhance RuO4 release by an addition below the equivalent neutralization whereas alkaline earth hydroxides do not have such effect. (Source: Journal of Radioanalytical and Nuclear Chemistry)
Source: Journal of Radioanalytical and Nuclear Chemistry - November 8, 2023 Category: Nuclear Medicine Source Type: research

Intercomparison exercise on difficult to measure alpha radionuclides in spent ion exchange resin
AbstractIn radiochemical analysis of decommissioning waste, reference materials are not commercially available and consequently intercomparison exercises are needed for method validations. This paper reports the results from an intercomparison exercise focusing on analyses ofα-emitter radionuclides in spent ion exchange resin. The exercise and statistical analysis of the submitted results were carried out based on ISO 13528 standard according to which the assigned values were calculated from the participant ’s results and the performances were assessed usingz-scores, which showed excellent performance for all241Am analy...
Source: Journal of Radioanalytical and Nuclear Chemistry - November 7, 2023 Category: Nuclear Medicine Source Type: research

Radioluminescence mapping of 241Am-doped environmental samples and nuclear materials
AbstractIn the framework of the project RemoteALPHA, several radioluminescence scanning systems were developed to establish the metrological basis for the optical detection of alpha-emitting radionuclides. This work demonstrates an application of the ultraviolet imaging system for the characterization of low-activity alpha sources: contaminated environmental samples, and nuclear materials featuring depleted uranium. The measurements were performed at a reference distance of 2  m from the source. The weakest samples were measured in a chamber with an N2 + NO gas atmosphere. Using the scanning method, the total surface ...
Source: Journal of Radioanalytical and Nuclear Chemistry - November 7, 2023 Category: Nuclear Medicine Source Type: research

UIO-66-NH2 modified by BPDA for adsorption studies of U(VI)
In this study, a crystal material UIO-66-NH2-BPDA was designed by grafting BPDA onto UIO-66-NH2 and applied to extract U(VI) from aqueous solution. According to performance tests, UIO-66-NH2-BPDA exhibits excellent chemical and thermal stability. The experimental results show that U(VI) adsorption by UIO-66-NH2-BPDA was tested to be 346.58  mg g−1 at pH  = 4 andT = 298 K. The data simulation demonstrates that the adsorption process was consistent with Langmuir isotherm and pseudo-second-order model. Meanwhile, the thermodynamic parameters suggest that the adsorption process was spontaneous and endothermic. Most...
Source: Journal of Radioanalytical and Nuclear Chemistry - November 7, 2023 Category: Nuclear Medicine Source Type: research

Gamma-radiation exposure by natural radionuclides in residential building materials on example of nine Russian cities
The objective of the study was to estimate the effective dose rates of external population exposure based on measurements of average specific activity of natural radionuclides (226Ra,232Th and40K) in building materials of existing buildings. The measurements were performed using new developed non-destructive technique in 100 apartments in 9 Russian cities. The effective dose rate is 34  nSv h–1 in average and varies from 10 to 102  nSv h–1 between cities. Specific factors of conversion from specific activity to effective dose rate were obtained taking into account the real room geometries. (Source: Journal of Radio...
Source: Journal of Radioanalytical and Nuclear Chemistry - November 7, 2023 Category: Nuclear Medicine Source Type: research

Research on conventional leaching process and leaching kinetics of a hard rock uranium mine
AbstractTo investigate the leaching rules and mechanism of a hard rock uranium ore, this paper conducted conventional leaching experiments based on the chemical composition and mineral occurrence status of the ore. Various factors affecting leaching were explored, and experimental data were fitted using the shrinking-core model. The results showed that uranium in the ore mainly existed in the form of pitchblende and coffinite, and the uranium grade of the sample was 0.15%. Under the leaching conditions of a temperature of 50  °C, a particle size of  − 100 mesh, an acid dosage of 32 kg t−1, a pyrolusite dosage o...
Source: Journal of Radioanalytical and Nuclear Chemistry - November 7, 2023 Category: Nuclear Medicine Source Type: research

Validation of detection efficiency-based corrections implemented in the k0-INRIM software
AbstractThe k0-INRIM is a software implemented at the Italian Metrology Institute (INRIM) to aid users elaborating data to obtain results including uncertainty budgets for Neutron Activation Analysis (NAA). The code relies on the efficiency evaluation based on an experimental characterization of the gamma detection system to calculate efficiency-based corrections. In order to validate the models adopted for these corrections in most demanding experimental conditions, an experiment is performed to collect data from point-like and extended-sources counted far from and near to the end-cap of two gamma detectors having differe...
Source: Journal of Radioanalytical and Nuclear Chemistry - November 6, 2023 Category: Nuclear Medicine Source Type: research

Using a multistandard color chart guide for digital cameras to detect total uranium in drinking water using arsenazo III: an approach
AbstractThe present study developed a multistandard color chart for detecting uranium (U) by arsenazo III using digital cameras with color tool measurements and compared it with conventional methods. The color chart is red to dark red as monochromatic for cameras. The detection limit is 5  ng/mL using a preconcentration factor of 100, which is well below WHO guidelines. The digital cameras showed lower bias and better trueness compared to the conventional methods. This provides an advantage in portability, ease of analysis, and no need for high-end instruments/radiochemical laborato ries for U analysis in drinking water. ...
Source: Journal of Radioanalytical and Nuclear Chemistry - November 6, 2023 Category: Nuclear Medicine Source Type: research

Determination of chemical elements and natural radionuclides in shopping plastic bags using k0-neutron activation analysis
AbstractThe neutron activation analysis technique was applied to determine several chemical elements in shopping plastic bags in order to evaluate their environmental impact.40K (from K),232Th and238U were also determined to predict their radiological impact. In total, 38 elements were determined including Th, and U. These results revealed that  ~ 20% of samples under investigation had Cr exceeded the regulated level for packing and packing waste. On the other hand, 50% of samples have Zn and/or Cr violate the regulated levels in plastic products intended to come into contact with foodstuffs. Models for radiological ha...
Source: Journal of Radioanalytical and Nuclear Chemistry - November 6, 2023 Category: Nuclear Medicine Source Type: research

Investigation of neutrons' contribution to the practical yield of 99mTc from thick Mo-sample irradiation in 11-MeV cyclotron
AbstractThis paper considers secondary neutrons contribution to the yield of99mTc obtained from the thick Mo-sample via (p,2n) nuclear reaction channel. The physical yield was determined experimentally using 11-MeV cyclotron Eclipse RD with application of the new target assembly developed for solid sample irradiations and appeared to be 30.9  ± 1.3 MBq/μAh. The neutron flux over the sample was analyzed by MCNP simulations taking into account the construction elements of the target module and cyclotron self-shielding. The contribution to the99mTc yield by indirect production via98Mo(n, γ)99Mo  → 99mTc reaction...
Source: Journal of Radioanalytical and Nuclear Chemistry - November 4, 2023 Category: Nuclear Medicine Source Type: research

A comparative study on pyrochlore phase formation in La2Zr2O7 in microscopic and macroscopic scale
AbstractAtomic scale study has been carried out to probe the pyrochlore phase formation in local scale and compare it with the long range ordering. Lanthanum zirconate (La2Zr2O7) pyrochlore was synthesized by wet chemistry and characterized by X-ray diffraction to study the long range ordering. Time Differential Perturbed γ-γ Angular Correlation (TDPAC) Spectroscopy was performed to identify the pyrochlore phase formation in local scale. Electron paramagnetic resonance and Photo-luminescence spectroscopic studies were used to identify the defects in local scale. Role of annealing and defects in nucleation of pyroch lore ...
Source: Journal of Radioanalytical and Nuclear Chemistry - November 4, 2023 Category: Nuclear Medicine Source Type: research