Volume conservation during irradiation growth of Zr-2.5Nb |
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Authors: | RA Holt AR Causey |
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Affiliation: | a Dept. of Mechanical and Materials Engineering, Queen’s University, McLaughlin Hall, 130 Stuart Street, Kingston, Ont., Canada K7L 3N6 b AECL, Chalk River, Ont., Canada K0J 1J0 |
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Abstract: | Dimensional changes are reported in three dimensions for cold-worked Zr-2.5 Nb pressure tube material irradiated to a fast fluence of 174 × 1024 nm−2, E > 1 MeV at a nominal temperature of 250 °C. The observed dimensional changes in the longitudinal and transverse directions (up to ∼1.2% and ∼−0.5%, respectively) are consistent with earlier data at 280 °C and 310 °C, and the previously reported negative temperature dependence. The observed growth in the radial direction is negative (up to ∼0.7%). Initially, there is a small volume increase (0.05-0.1%) but this gradually decays to < 0.05% and the long term rate of volume change is negligible, within the accuracy of the measurement, demonstrating that the phenomenon observed is, indeed, irradiation growth. |
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Keywords: | N0100 R0300 R0400 T0200 Z0100 |
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