Open AccessInteraction of Uranium-Zirconium Carbonitride Fuel Composition with Refractory Structural Materials
Author(s) -
D.A. Zaytsev,
A N Bakhin,
B N Bespechalov,
V Yu Vishnevsky,
Dmitry S. Kiselev,
E G Kolesnikov,
A. Yu. Kotov,
V Yu Kochnov,
V. M. Repnikov,
V. S. Serikov
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1683/3/032037
Subject(s) - materials science , zirconium , monocrystalline silicon , pellets , crystallite , uranium , microstructure , annealing (glass) , cladding (metalworking) , metallurgy , composite material , silicon
This paper uses the results of material science studies whose purpose was to investigate contact compatibility of uranium-zirconium carbonitride-based fuel pellets with the chosen refractory structural materials under the conditions of high-temperature pre-irradiation tests. Monocrystalline W-3Ta spacers with [110], [123], [112] orientations and polycrystalline W and Mo spacers served as contact pairs for the fuel pellets. The fuel and structural materials underwent annealing at various temperatures significantly exceeding 1200 °C. Duration of experiments for contact pairs with monocrystalline spacers was 80 and 300 hours, for polycrys-talline materials the exposure was 50, 100 and 150 hours. High stability of microstructure and chemistry of the U,Zr(C,N)-based composition was observed throughout the entire temperature-time diapason of the tests. No formation of intermediate phases capable of impairing air-tightness and operability of the cladding materials have been found in the interface zone. As a result of the studies performed, it has been found that orientation of W-3Ta monocrystals has no impact on the diffusion rate. Depth of uranium atoms penetration into monocrystalline samples didn’t exceed 15μm in the entire temperature-time diapason. For polycrystalline materials this value was 40 and 350 for W and Mo respectively.