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Factors Influencing Reorientation of Hydrides in Unirradiated Cladding Tubes from E110 Alloy under Conditions of Long-Term Dry Storage of SNF

  • RADIATION RESISTANCE OF MATERIALS AND EQUIPMENT
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Abstract

One of the factors capable of resulting in deconfinement of fuel element cladding upon long term storage of spent nuclear fuel (SNF) is reorientation of hydrides. This work estimates the extent of reorientation of hydrates in unirradiated gas filled specimens of fuel element claddings of VVER-1000 reactor (Zr‒1% Nb) under the conditions simulating conditions of dry storage. The specimens with the hydrogen content of 100 and 200 ppm were exposed to thermomechanical tests according to various scenarios at hoop stresses in cladding up to 100 MPa. It has been established that the extent of reorientation of hydrides and related decrease in plasticity of cladding material are insignificant. The most significant factor influencing the extent of reorientation is the level of hoop stresses.

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Funding

This work was supported by TVEL Fuel Company using the experimental facilities of the Research Complex of Material Science Hot Cells, National Research Center Kurchatov Institute.

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Authors and Affiliations

  1. National Research Centre Kurchatov Institute, 123182, Moscow, Russia

    R. A. Kurskiy, A. V. Rozhkov, O. O. Zabusov, A. B. Gaiduchenko, A. S. Bragin, D. A. Maltsev & D. V. Safonov

  2. TVEL Fuel Company, 115409, Moscow, Russia

    A. A. Shishkin

Authors
  1. R. A. Kurskiy
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  2. A. V. Rozhkov
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  3. O. O. Zabusov
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  4. A. B. Gaiduchenko
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  5. A. S. Bragin
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  6. D. A. Maltsev
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  7. D. V. Safonov
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  8. A. A. Shishkin
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Corresponding author

Correspondence to R. A. Kurskiy.

Additional information

Translated by I. Moshkin

ADDITIONAL INFORMATION

The results of this work will be used in the model substantiating safety of long-term dry storage of SNF of VVER-1000 reactors.

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Kurskiy, R.A., Rozhkov, A.V., Zabusov, O.O. et al. Factors Influencing Reorientation of Hydrides in Unirradiated Cladding Tubes from E110 Alloy under Conditions of Long-Term Dry Storage of SNF. Phys. Atom. Nuclei 84, 1665–1671 (2021). https://doi.org/10.1134/S1063778821100203

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  • DOI: https://doi.org/10.1134/S1063778821100203

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