Validation of actinide fluoride simulators for studying solubility in fuel salt of molten-salt reactors

Ponomarev, L. I.; Seregin, M. B.; Mikhalichenko, A. A.; Parshin, A. P.; Zagorez, L. P.

doi:10.1007/s10512-012-9577-7

Cited by 14 publications

(7 citation statements)

References 7 publications

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“…However, the available literature data are miscellaneous and sometimes contradictory, which is explained by the obvious experimental difficulties including the quality of the salt preparation, purity of the atmosphere over the melt, among others. It is known that plutonium and americium fluorides are imitated by cerium and neodymium fluorides [24][25][26][27][28][29]. It is reasonable first to analyze lanthanide fluorides, as the elements are similar to actinide fluorides' physical-chemical, thermodynamic, and other properties, and then inquire into the study of individual actinide fluorides and their mixtures.…”

Section: Introductionmentioning

confidence: 99%

Corrosion Behavior of Candidate Functional Materials for Molten Salts Reactors in LiF–NaF–KF Containing Actinide Fluoride Imitators

et al. 2022

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Molten fluorides of alkali metals are considered a technological medium for molten salt reactors (MSRs). However, these media are known to be extremely corrosive. The successful implementation of high-temperature technological devices using molten alkali metal fluorides requires the selection of such structural materials that have high corrosion resistance in melts with compositional characteristic of MSRs. In this research, the corrosion behavior of 12Cr18Ni10Ti steel, the alloy Ni60Cr20Mo15, and the alloy Monel 404 (Ni50Cu50) was investigated in the LiF–NaF–KF eutectic melt, containing additions of CeF3 and NdF3 from 0 to 5 wt.% as imitator fluorides of actinides in an inert argon atmosphere at 550 °C for 100 h. Gravimetry, energy-dispersive X-ray (EDX) microanalysis of surfaces and cross-section of samples, and ICP-MS were used to establish the corrosion behavior of the investigated alloys. Corrosion resistance of the studied materials was found to decrease in a row from Monel 404 > Hastelloy C2000 > 12Cr18Ni10Ti. The addition of cerium fluoride into the melt resulted in the additional etching of the alloy surface. The addition of neodymium fluoride resulted in the formation of the point/inter-crystalline corrosion damages in the sample bulk. The samples of steel 12Cr18Ni10Ti were subjected to local cracking corrosion. The austenitic nickel-based alloys suffered specific local corrosion with formation of subsurface voids. Excellent corrosion resistance of the Monel alloy under the test conditions was found.

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Section: Introductionmentioning

confidence: 99%

Corrosion Behavior of Candidate Functional Materials for Molten Salts Reactors in LiF–NaF–KF Containing Actinide Fluoride Imitators

et al. 2022

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“…It should be taken into account that high concentrations of actinide fluorides can significantly impact the physicochemical properties of solvent melts. However, the study of this effect requires rather complex equipment, time, and material costs . It is much more efficient to carry out the necessary investigations by applying the analogues of actinideslanthanides, which are close in physicochemical, thermodynamic, and crystallographic properties.…”

Section: Introductionmentioning

confidence: 99%

“…However, the study of this effect requires rather complex equipment, time, and material costs. 17 It is much more efficient to carry out the necessary investigations by applying the analogues of actinides� lanthanides, which are close in physicochemical, thermodynamic, and crystallographic properties. It is known 17,18 that lanthanide fluorides CeF 3 and NdF 3 are imitators of actinide fluorides PuF 3 and AmF 3 , correspondently.…”

Section: ■ Introductionmentioning

confidence: 99%

Molecular Dynamics and Experimental Study of the Effect of CeF₃ and NdF₃ Additives on the Physical Properties of FLiNaK

et al. 2023

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The paper presents the results, which are consistent within 2%, obtained both in the simulation of molecular dynamics and in the experiment on the study of the kinetic properties of molten FLiNaK with addition of lanthanide fluorides. The parameters of the Born−Huggins−Meier potential for the interaction of CeF 3 or NdF 3 with FLiNaK components are first calculated using the ab initio approach. The enthalpy of the system with dissolved CeF 3 or NdF 3 calculated in the model increases by ∼4.4% over the entire temperature range studied (800 ≤ T ≤ 1020 K). The self-diffusion coefficients of the molten salt components are calculated from the Einstein relation and also estimated from the shear viscosity data. The temperature dependences of the shear viscosity of molten FLiNaK as well as FLiNaK with additions of 15 mol % CeF 3 or NdF 3 are determined experimentally and by calculation. In addition, the dependence of shear viscosity on the concentration of CeF 3 and NdF 3 in FLiNaK is measured and calculated. The linear growth of the shear viscosity with the CeF 3 and NdF 3 concentrations is obtained. Experimental dependence is in good agreement with the simulated results in the case of NdF 3 , and there is the discrepancy while CeF 3 addition. An analytical approximation of the temperature and concentration dependences for the viscosity of molten FliNaK and for the calculated self-diffusion coefficients of constituent elements is proposed. Linear approximation of temperature dependence of the self-diffusion coefficients of similar components in the corresponding extended systems is presented.

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“…The study of such systems is time-consuming and expensive; therefore, measurements are carried out using simulators. Neodymium fluoride (NdF 3 ) can serve as a simulator of AmF 3 and CmF 3 , since they have similar thermodynamic properties, crystal lattice parameters and physicochemical characteristics [ 5 ].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Viscosity of the NaF-KF-NdF3 Molten System

Rudenko

Катаев

2022

Materials

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The dynamic viscosity (η) of the molten system (NaF-KF)eut-NdF3 containing NdF3 in an amount from 0 to 15 mol.% was studied by rotational viscometry using a high-temperature rheometer, FRS 1600. Viscosity measurements were carried out in the temperature range from liquidus to 1153 K. The measurement procedure was tested on the (LiF-NaF-KF)eut melt. The choice of the parameter shear rate was carried out according to the viscosity and flow curves. Viscosity does not depend on shear rate, and therefore the investigated melts behave like Newtonian fluids, in the range of 9–19 s−1. The experimentally obtained viscosity values for (NaF-KF)eut-NdF3 melts in a wide temperature range are described by an exponential equation. In the coordinates ln(η) = f(1/T), they are straight lines; however, their temperature coefficients are noticeably different, which indicates significant impacts of composition and temperature.

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Validation of actinide fluoride simulators for studying solubility in fuel salt of molten-salt reactors

Cited by 14 publications

References 7 publications

Corrosion Behavior of Candidate Functional Materials for Molten Salts Reactors in LiF–NaF–KF Containing Actinide Fluoride Imitators

Corrosion Behavior of Candidate Functional Materials for Molten Salts Reactors in LiF–NaF–KF Containing Actinide Fluoride Imitators

Molecular Dynamics and Experimental Study of the Effect of CeF₃ and NdF₃ Additives on the Physical Properties of FLiNaK

Dynamic Viscosity of the NaF-KF-NdF3 Molten System

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Validation of actinide fluoride simulators for studying solubility in fuel salt of molten-salt reactors

Cited by 14 publications

References 7 publications

Corrosion Behavior of Candidate Functional Materials for Molten Salts Reactors in LiF–NaF–KF Containing Actinide Fluoride Imitators

Corrosion Behavior of Candidate Functional Materials for Molten Salts Reactors in LiF–NaF–KF Containing Actinide Fluoride Imitators

Molecular Dynamics and Experimental Study of the Effect of CeF3 and NdF3 Additives on the Physical Properties of FLiNaK

Dynamic Viscosity of the NaF-KF-NdF3 Molten System

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Molecular Dynamics and Experimental Study of the Effect of CeF₃ and NdF₃ Additives on the Physical Properties of FLiNaK