Molten-Salt Reactor for Nuclear Fuel Cycle Closure on All Actinides

Ignatiev, V.; Kormilitsyn, M. V.; Kormilitsyna, L. A.; Semchenkov, Yu. M.; Fedorov, Yu. S.; Feinberg, O. S.; Kryukov, O. V.; Khaperskaya, A. V.

doi:10.1007/s10512-019-00481-w

Cited by 25 publications

(2 citation statements)

References 2 publications

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“…Properties of molten fluoride salts enable their usage in molten salt reactors (MSRs) as solvents [1][2][3]. However, the successful usage of molten alkali fluorides [4][5][6][7] requires the development of functional materials having high corrosion resistance in the melt of composition characteristics for molten salts reactors. To date, this essential problem has not been solved [8][9][10].…”

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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“…The great advantages of the designs of the IV generation reactor systems with molten salts are the efficient use of fuel, minimal amount of radioactive waste and expected economically attractive, safe and environmentally friendly operation [ 6 , 7 , 8 ]. Molten salts can be used as a reactor coolant or transfer medium in high-temperature technological thermal circuits (from nuclear reactors to hydrogen production), but corrosion of metallic materials is a serious problem [ 9 , 10 , 11 ].…”

Section: Introductionmentioning

confidence: 99%

High-Temperature Passivation of the Surface of Candidate Materials for MSR by Adding Oxygen Ions to FLiNaK Salt

et al. 2022

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The problem of tailoring the structural materials for MSR is solved by continuously overcoming the shortcomings of widely used materials and finding new ones. The materials commonly used in engineering may not be applicable for MSR due to their high corrosivity. Experiments were carried out to determine the corrosion rate of stainless steel 12Cr18Ni10Ti with different concentrations of oxide ions (by adding lithium oxide to the melt in the concentration range from 0 to 0.8 wt.%) in a FLiNaK melt. The formation of a protective oxygen-containing layer with a thickness of 1 micron has been realized. The corrosion rate decreases by an order of magnitude at the concentration of oxygen anions in the melt, in the range from 0.2 to 0.4% by weight, which may indicate high-temperature passivation of the material due to modification of the composition of the fluoride melt and reduction in its corrosion activity. In addition, the corrosion type of stainless steel in fluoride melts changes from the intercrystalline and pitting that is usually harmful to reactor material structure to total corrosion when lithium oxide is added. This is due to the “healing” of individual corrosion defects formed on the surface of the studied material by oxygen-containing compounds.

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Fiber – Optical System for Governance and Control of Work for Nuclear Power Stations of Low Power

Myazin

Dudkin

Grebenikova

et al. 2019

Lecture Notes in Computer Science

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Molten-Salt Reactor for Nuclear Fuel Cycle Closure on All Actinides

Cited by 25 publications

References 2 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

High-Temperature Passivation of the Surface of Candidate Materials for MSR by Adding Oxygen Ions to FLiNaK Salt

Fiber – Optical System for Governance and Control of Work for Nuclear Power Stations of Low Power

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