Analysis of the vertical distribution and size fractionation of natural and artificial radionuclides in soils in the vicinity of hot springs

Mitsios, I. K.; Anagnostakis, M.J.; Mostacci, Domiziano

doi:10.1080/10420150.2018.1528605

Cited by 4 publications

(2 citation statements)

References 9 publications

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“…Besides airborne activity determinations, several rainwater, plant, and soil samples attested the deposition of 106 Ru across Europe (SI Appendix, Tables S3 and S4). Most deposition arose from rain events that occurred between the last week of September 2017 and the first week of October, as for example at several Scandinavian sampling locations (up to about 50 Bq•m −2 in Sweden and about 50-90 Bq•m −2 in Finland) or, for example, in Greece in the second week of October (30) S3 and S4). The majority of the highest surface-deposition records have been reported from locations within 20 km from the Mayak complex: Khudaiberdinskiy, Argayash, Novogorny, and Metlino (31,32), where the surface deposition reached up to 343 Bq•m −2 .…”

Section: Resultsmentioning

confidence: 99%

Airborne concentrations and chemical considerations of radioactive ruthenium from an undeclared major nuclear release in 2017

Masson

Steinhäuser

Zok

et al. 2019

Proc. Natl. Acad. Sci. U.S.A.

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In October 2017, most European countries reported unique atmospheric detections of aerosol-bound radioruthenium (106Ru). The range of concentrations varied from some tenths of µBq·m−3 to more than 150 mBq·m−3. The widespread detection at such considerable (yet innocuous) levels suggested a considerable release. To compare activity reports of airborne 106Ru with different sampling periods, concentrations were reconstructed based on the most probable plume presence duration at each location. Based on airborne concentration spreading and chemical considerations, it is possible to assume that the release occurred in the Southern Urals region (Russian Federation). The 106Ru age was estimated to be about 2 years. It exhibited highly soluble and less soluble fractions in aqueous media, high radiopurity (lack of concomitant radionuclides), and volatility between 700 and 1,000 °C, thus suggesting a release at an advanced stage in the reprocessing of nuclear fuel. The amount and isotopic characteristics of the radioruthenium release may indicate a context with the production of a large 144Ce source for a neutrino experiment.

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Section: Resultsmentioning

confidence: 99%

Airborne concentrations and chemical considerations of radioactive ruthenium from an undeclared major nuclear release in 2017

Masson

Steinhäuser

Zok

et al. 2019

Proc. Natl. Acad. Sci. U.S.A.

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“…It is noted that the nominal dimensions of the germanium crystal of the Ge33 detector were validated through the comparison of simulations against experiments, in order to confirm that they have not been changed over the course of time. The PENELOPE model used for the LEGe detector was developed and validated in a previous study [9]. In terms of the MCNP code, the models for the two detectors were developed from scratch using the same parameters as in the PENELOPE models.…”

Section: Detector Modelsmentioning

confidence: 99%

True coincidence summing corrections in HPGe detectors

et al. 2023

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The true coincidence effect is studied in two High Purity Germanium (HPGe) detectors for a variety of isotopes, source geometries and source to detector configurations, via computational tools based on Monte–Carlo simulations. Τhe upgraded patch of MCNP code MCNP–CP and the 2018 version of PENELOPE, which take into account the decay scheme of each cascade emitter, are used to calculate the Full Energy Peak Efficiency (FEPE) for the corresponding gamma-ray energies. The true coincidence correction (TCC) factor is calculated as the ratio of the FEPE derived for each nuclide taking into consideration the true coincidence effect, to the FEPE estimated without considering the phenomenon. In all cases, a satisfactory agreement is observed between the TCC factors calculated using MCNP–CP and PENELOPE 2018. Moreover, the results of the calculations are compared against experimentally derived efficiency values. The correction factors obtained using the TrueCoinc software are applied on experimentally determined FEPE curves, based on measurements performed using reference sources, and consequently the corrected data are compared against the simulations for the "non-coincidence" case. The results of this work contribute to the validation of the computational tools and codes used to study the true coincidence effect and determine the corresponding correction factors, providing useful data for gamma–spectrometry studies of cascade emitters.

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A Monte Carlo simulation study for SSNTDs used in radon and thoron detection

Kara,

Mammadzada

2024

Indian J Phys

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Analysis of the vertical distribution and size fractionation of natural and artificial radionuclides in soils in the vicinity of hot springs

Cited by 4 publications

References 9 publications

Airborne concentrations and chemical considerations of radioactive ruthenium from an undeclared major nuclear release in 2017

Airborne concentrations and chemical considerations of radioactive ruthenium from an undeclared major nuclear release in 2017

True coincidence summing corrections in HPGe detectors

A Monte Carlo simulation study for SSNTDs used in radon and thoron detection

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