Coupled multi-physics simulation for the evaluation of an accelerator-driven Aqueous Homogeneous Subcritical System for medical isotope production

Pardo, Liván Hernández; Pérez, Daylen Milian; Pérez, Daniel Milian; Lorenzo, Daniel E. Milian; Lira, Carlos Alberto Brayner de Oliveira

doi:10.1016/j.pnucene.2021.103692

Cited by 5 publications

(2 citation statements)

References 5 publications

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“…Now, after each ANSYS-CFX calculation step is rectified the mass density of each fuel solution cell in the MCNP6 model instead of changing only the global mass density, as it was done in [8]. In [7], [8], [11]- [14] are explained, described and discussed the selection of the computational models, thermal and material properties correlations, boundary conditions, solution parameters, geometrical and material approximations and others modeling related topics.…”

Section: Implementation Of the Multi-cell Approach And Improvements In The Coupling Methodologymentioning

confidence: 99%

Implementation of a Multi-cell Approach in the Multi-Physics Calculations of an Aqueous Homogeneous Reactor

Pérez

Rodríguez

Pardo

et al. 2021

International Journal of Thermodynamics

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Nowadays, the Aqueous Homogeneous Reactor (AHR) technology is under study for its use in the production of medical isotopes. This technology has proven to be potentially advantageous for this purpose due to its low cost, small critical mass, inherent passive safety, and simplified fuel handling, processing, and purification characteristics. Among the studies being carried out is computational modeling and simulation, which represents a key technology in the pursuit for improvements in efficiency, safety, and reliability of these systems. This paper aims to expand upon a previous AHR computational model through the implementation of a multi-cell approach for the improvement of the calculations using a methodology for the multi-physics and multi-scale coupling of the neutronic and thermal-hydraulic codes. It was found that these additions to the original model cause a small change to the overall reactor behavior. Thermal-hydraulic parameters such as, average fuel solution temperature and velocity, gas volume fraction and average radiolytic gas bubbles velocity undergo a variation of 0.161 °C, 0.0009 m/s, 0.015% and 0.0003 m/s. In contrast, significant local differences were obtained mainly for the fuel solution temperature and radiolytic gas bubbles volume fraction. It was verified that a simplified AHR computational model consisting of a 20° section of the fuel solution is able to adequately reproduce the results of the full AHR computational model.

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Section: Implementation Of the Multi-cell Approach And Improvements In The Coupling Methodologymentioning

confidence: 99%

Implementation of a Multi-cell Approach in the Multi-Physics Calculations of an Aqueous Homogeneous Reactor

Pérez

Rodríguez

Pardo

et al. 2021

International Journal of Thermodynamics

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“…The use of Aqueous Homogeneous Reactors (AHR) for producing 99 Mo could be a promising technology, compared to the traditional method of irradiating targets in heterogeneous reactors, due to their expected low cost (up to US$ 30 million per unit), small critical mass (~ 10 kg of uranium), low thermal power (50-300 kWth), low operating pressure (slightly below atmospheric pressure) and temperature (up to 90 °C), inherent safety, and simplified fuel handling, processing and purification characteristics [1,4,5]. An AHR conceptual design, based on the Russian reactor ARGUS, was developed for the production of 99 Mo and other medical isotopes [6][7][8][9][10][11][12][13][14]. Presently, the ARGUS reactor stands out as the only largescale successful experiment on the use of an AHR in steady-state operation.…”

Section: Introduction mentioning

confidence: 99%

Neutronic Evaluation of Using a Thorium Sulfate Solution in an Aqueous Homogeneous Reactor

Pérez¹,

Milian²,

Hernández

et al. 2022

Atom Indo.

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Radioisotope 99 Mo is one of the most essential radioisotopes in nuclear medicine. Its production in an Aqueous Homogeneous Reactor (AHR) could be potentially advantageous compared to the traditional technology, based on target irradiation in a heterogeneous reactor. An AHR conceptual design using low-enriched uranium for the production of 99 Mo has been studied in depth. So far, the possibility of replacing uranium with a non-uranium fuel, specifically a mixture of 232 Th and 233 U, has not been evaluated in the conceptual design. Therefore, the studies conducted in this article aim to evaluate the neutronic behavior of the AHR conceptual design using thorium sulfate solution. Here, the 232 Th-233 U composition to guarantee ten years of operation without refueling, conversion ratio, medical isotopes production levels, and reactor kinetic parameters were evaluated, using the computational code MCNP6. It was obtained that 14 % 233 U enrichment guarantees the reactor operation for ten years without refueling. The conversion ratio was calculated at 0.14. The calculated 99 Mo production in the AHR conceptual design resulted in 24.4 % higher with uranium fuel than with thorium fuel.

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Free vibration and buckling of functionally graded porous beams using analytical, finite element, and artificial neural network methods

Turan

Yaylacı

2022

Arch Appl Mech

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Coupled multi-physics simulation for the evaluation of an accelerator-driven Aqueous Homogeneous Subcritical System for medical isotope production

Cited by 5 publications

References 5 publications

Implementation of a Multi-cell Approach in the Multi-Physics Calculations of an Aqueous Homogeneous Reactor

Implementation of a Multi-cell Approach in the Multi-Physics Calculations of an Aqueous Homogeneous Reactor

Neutronic Evaluation of Using a Thorium Sulfate Solution in an Aqueous Homogeneous Reactor

Free vibration and buckling of functionally graded porous beams using analytical, finite element, and artificial neural network methods

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