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Vanadium samples with controlled oxygen impurity of up to 2460at.ppm were irradiated with fast neutrons to a fluency of 8.3×1018ncm-12 at 150°C. The irradiation-induced nanovoids and the interaction between the defects and the oxygen impurities are studied systematically by combining the positron lifetime technique, the coincidence Doppler broadening technique and the first-principles calculations...
The nanostructural evolution of irradiation-induced Cu-rich nanoprecipitates (CRNPs) and vacancy clusters in surveillance test specimens of in-service commercial nuclear reactor pressure vessel steel welds of Doel-1 and Doel-2 are revealed by combining the three-dimensional local electrode atom probe and positron annihilation techniques. In both medium (0.13wt.%) and high (0.30wt.%) Cu welds, the...
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