Measurement and analysis of radioactivity induced in yttrium and lead in fusion peak neutron field
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Abstract Yttrium is an element in oxide dispersion strengthened (ODS) steels to be used as structural material at high neutron doses and temperatures. Lead acts as a neutron multiplier and coolant in breeding blanket concepts such as the EU test blanket modules (TBM) with Pb–17Li. Samples of pure Y and Pb were irradiated with D–T fusion neutrons. The radioactivity following irradiation was determined several times during decay by γ-spectroscopy. The results were analysed with the European Activation System. Ratios of calculated-to-experimental values for individual activities are discussed in connection with the expected activation performance of the materials in fusion power plant conditions.
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