Abstract
Matrices of the compositions 0.2La2O3·Al2O3 and 0.4La2O3·Fe2O3, containing weighable amounts of Pu (13 mg g−1) and Am (0.336 mg g−1), were prepared, and their leaching rates were studied. The leaching rates calculated from the surface area determined by low-temperature nitrogen adsorption (BET method) virtually coincide with those found previously for the matrices with tracer amounts of the radionuclides, which indicates that these parameters are intrinsic characteristics of the matrices. The leaching rates calculated from the geometric surface areas are considerably higher and depend on the material porosity and hence on the procedure of its synthesis. The rates of the matrix corrosion were calculated from the 147Pm leaching rates. They show that the matrix will not disintegrate into small fragments for 100 thousand years even under the emergency conditions of repository flooding with water.
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Merkushkin, A.O., Ochkin, A.V., Rovnyi, S.I., and Stefanovskii, S.V., Radiokhimiya, 2009, vol. 51, no. 2, pp. 170–174.
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Original Russian Text © A.O. Merkushkin, A.V. Ochkin, S.I. Rovnyi, A.I. Bobylev, S.V. Stefanovskii, 2009, published in Radiokhimiya, 2009, Vol. 51, No. 2, pp. 175–177.
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Merkushkin, A.O., Ochkin, A.V., Rovnyi, S.I. et al. Doping of the perovskite MIMIIO3 with weighable amounts of Pu and Am. Radiochemistry 51, 198–200 (2009). https://doi.org/10.1134/S1066362209020192
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DOI: https://doi.org/10.1134/S1066362209020192