The effect of RE-rich phase on the thermal conductivity of U–Zr–RE alloys

Cheon, Jin-Sik; Oh, Seok Jin; Lee, Chan-Bock

doi:10.1016/j.jnucmat.2008.12.313

Cited by 10 publications

(3 citation statements)

References 11 publications

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“…Методики измерения теплопроводности описаны в работах [8,9]. В большинстве работ теплопроводность была рассчитана либо с использованием данных по удельному электросопротивлению (закон Видемана-Франца) [8,9], либо на основе результатов измерений плотности, удельной теплоёмкости и температуропроводности [10,11], либо с применением расчетных кодов и моделей [12][13][14][15][16][17][18]. В немногих работах представлены данные по теплопроводности сплавов U-Zr, близких по составу к U-10 масс.…”

Section: Introductionunclassified

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STUDY OF U-10 % Zr ALLOY PROPERTIES

Kurina

Frolova

Chesnokov

et al. 2021

Problems of Atomic Science and Technology. Series: Nuclear and Reactor Constants

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Density, phase composition, microstructure and thermal conductivity of the U-10 wt. % Zr alloy manufactured by induction melting with subsequent casting into quartz molds and turning to size have been investigated at JSC “SSC RF - IPPE”. For comparison, the density and thermal conductivity of the U-10 wt. % Zr alloy produced by melting followed by extrusion and turning to size were investigated. To determine the density, a hydrostatic weighing method was used. The average density values of the cast and extruded alloy were respectively 98.8 and 97.5 % of the theoretical density, which was calculated according to the rule of mixtures. The results of studying the microstructure using a scanning electron microscope are presented. It is shown that the cast alloy U-10 % Zr is a metal matrix in which zirconium-enriched particles of arbitrary shape are distributed. In a metal matrix, the bulk of the volume is occupied by the α-U, and there are also precipitates of the δ-phase in the form of thin plates. A lower value of the microhardness of the alloy is noted in comparison with the data published in the known literature. The results of measuring the thermal conductivity at temperatures from 100 to 750 °C for the U-10 wt. % Zr alloy obtained by casting and extrusion are presented. The stationary axial heat flux method (or method of plate) was used to measure the thermal conductivity. Alloy samples made in different ways have almost the same thermal conductivity at 200 °C. With an increase in temperature, the discrepancy in thermal conductivity between the samples of the cast and extruded alloy gradually increases, and the thermal conductivity of the extruded alloy turns out to be lower, which is especially noticeable in the temperature range of 600-750 °C. The data obtained are compared with the results of published works. The measured values of the thermal conductivity of the cast alloy U-10 wt. % Zr up to a temperature of 750 °C do not disagree with the literature data. It was found that at a higher temperature, the alloy softens, which, in turn, leads to deformation of the test specimen and an increase in the measurement error when using the axial heat flux method.

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Section: Introductionunclassified

“…% Zr (от 9 до 11,4 масс. % Zr) [4,[9][10][11][13][14][15][16][17][18]. Результаты измерений теплопроводности методом осевого теплового потока представлены в работе [4] для сплава U-11,4 масс.…”

Section: Introductionunclassified

STUDY OF U-10 % Zr ALLOY PROPERTIES

Kurina

Frolova

Chesnokov

et al. 2021

Problems of Atomic Science and Technology. Series: Nuclear and Reactor Constants

View full text Add to dashboard Cite

show abstract

“…Alloys of uranium, zirconium, and transuranic elements (TRUs) extracted from the spent fuel of pressurized water reactors (PWRs) were considered used in an SFR as metallic fuel material [1]. However, metallic alloys containing U, minor actinides, and fission products can chemically interact with the elements of ferritic/martensitic steel (FMS), which is the candidate material for cladding, at a relatively low temperature.…”

Section: Introductionmentioning

confidence: 99%