Abstract
In this paper, we have developed a model of radiation-induced densification of uranium-gadolinium fuel. The fuel is established to be in the brittle state under irradiation in the volume of uranium-gadolinium fuel pellet containing a burnable neutron absorber and in the plastic state out of this volume. The plastic zone volume increases during burnup of the neutron absorber. The relative change in a pellet volume or length of a fuel rod for uranium-gadolinium fuel is shown to be lower than that for uranium oxide nuclear fuel having the same microstructure and irradiated under the same conditions (the neutron flux).
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Original Russian Text © Yu.N. Devyatko, V.V. Novikov, O.V. Khomyakov, 2017, published in Yadernaya Fizika i Inzhiniring, 2017, Vol. 8, No. 5, pp. 445–456.
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Devyatko, Y.N., Novikov, V.V. & Khomyakov, O.V. Radiation-Induced Densification Model of Uranium-Gadolinium Fuel. Phys. Atom. Nuclei 81, 1301–1311 (2018). https://doi.org/10.1134/S1063778818090077
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DOI: https://doi.org/10.1134/S1063778818090077