Article ID Journal Published Year Pages File Type
1569973 Journal of Nuclear Materials 2006 17 Pages PDF
Abstract

The diffusivity of oxygen in liquid lead and lead–bismuth eutectic (LBE) alloy was measured by a potentiostatic method and is given by log(DOPb/cm2s-1)=-2.554-2384/T(±0.070), 818–1061 K, and log(DOLBE/cm2s-1)=-0.813-3612/T(±0.091), 811–980 K. The activity of oxygen in lead and LBE was determined by coulometric titration experiments. Using the measured data, the standard free energy of dissolution of oxygen in liquid lead and LBE was derived and is given byGO(Pb)xs=-121349+16.906T(±560)J(gatomO)-1,815–1090K,GO(LBE)xs=-127398+27.938T(±717)J(gatomO)-1,812–1012K.Using the above data, the Gibbs energy of formation of PbO(s) and equilibrium oxygen pressures measured over the oxygen-saturated LBE alloy, the solubility of oxygen in liquid lead and LBE were derived. The solubility of oxygen in liquid lead and LBE are given by log(S/at.%O) = −5100/T + 4.32 (±0.04), 815–1090 K and log(S/at.%O) = −4287/T + 3.53 (±0.06), 812–1012 K respectively.

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Physical Sciences and Engineering Energy Nuclear Energy and Engineering
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