Abstract
Matrices for actinide wastes, consisting of complex murataite-type oxides, were studied. The samples were prepared by sintering of the oxide charge at 1100–1400°C or by fusion at 1450–1600°C followed by crystallization. Along with the structural analog of the natural mineral (murataite 3C), appreciable role in the samples is played by the phases (hereinafter murataites 5C, 7C, and 8C) consisting of pyrochlore and murataite 3C units. The fraction of wastes in the samples is about 10 wt %, which is close to the values for the pyrochlore matrix for Pu immobilization. In the ceramics prepared from the melt, the murataite grains have a zonal structure. They are built of murataite 3C at edges and murataite 5C (rarely 7C) in the center where the actinide content is maximal. This fact accounts for their high capability to isolate radionuclides. Amorphization of the structure only slightly affects the stability of murataite in solution. The optimal procedure for the industrial production of the matrices is their melting by induction heating in cold crucible (IMCC) and crystallization.
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References
Kopyrin, A.A., Karelin, A.I., and Karelin, V.A., Tekhnologiya proizvodstva i radiokhimicheskoi pererabotki yadernogo topliva (Technology of Production and Radiochemical Reprocessing of Nuclear Fuel), Moscow: Atomenergoizdat, 2006.
Laverov, N.P., Velichkin, V.I., Omel’yanenko, B.I., et al., Izolyatsiya otrabotavshikh yadernykh materialov: geologo-geokhimicheskie aspekty (Isolation of Spent Nuclear Materials: Geological and Geochemical Aspects), Moscow: Inst. Fiziki Zemli, Ross. Akad. Nauk, 2008.
Laverov, N.P., Omel’yanenko, B.I., Yudintsev, S.V., et al., Geol. Rudn. Mestorozhd., 1997, vol. 39, no. 3, pp. 211–228.
Laverov, N.P., Gorshkov, A.I., Yudintsev, S.V., et al., Dokl. Ross. Akad. Nauk, 1998, vol. 363, no. 4, pp. 540–543.
Laverov, N.P., Yudintsev, S.V., Omel’yanenko, B.I., et al., Geol. Rudn. Mestorozhd., 1999, vol. 41, no. 2, pp. 99–108.
Urusov, V.S., Rusakov, V.S., and Yudintsev, S.V., Dokl. Ross. Akad. Nauk, 2002, vol. 384, no. 4, pp. 527–532.
Urusov, V.S., Organova, N.I., Karimova, O.V., et al., Kristallografiya, 2007, vol. 52, no. 1, pp. 41–49.
Laverov, N.P., Yudintsev, S.V., Yudintseva, T.S., et al., Geol. Rudn. Mestorozhd., 2003, vol. 45, no. 6, pp. 483–513.
Kir’yanova, O.I., Stefanovskii, S.V., Yudintsev, S.V., and Nikonov, B.S., Perspekt. Mater., 2003, no. 3, pp. 42–54.
Laverov, N.P., Yudintsev, S.V., Stefanovskii, S.V., et al., Geol. Rudn. Mestorozhd., 2006, vol. 48, no. 5, pp. 387–409.
Morgan, P.E.D. and Ryerson, F.J., J. Mater. Sci. Lett., 1982, vol. 1, pp. 351–352.
Ringwood, A.E., Mineral. Mag., 1985, vol. 49, pp. 159–176.
Ercit, T.S. and Hawthorne, F.C., Can. Mineral., 1995, vol. 33, pp. 1223–1229.
Portnov, A.M., Dubakina, L.S., and Krivokoneva, G.K., Dokl. Akad. Nauk SSSR, 1981, vol. 261, no. 3, pp. 741–744.
Belov, N.V., Ocherki po strukturnoi mineralogii (Essays on Structural Mineralogy), Moscow: Nedra, 1976.
Bayliss, P., Mazzi, F., Munno, R., and White, T.J., Mineral. Mag., 1989, vol. 53, pp. 565–569.
Kesson, S.E., Sinclair, W.J., and Ringwood, A.E., Nucl. Chem. Waste Manag., 1983, vol. 4, pp. 259–265.
Stefanovskaya, O.I., Stefanovskii, S.V., Yudintsev, S.V., and Nikonov, B.S., Vopr. Radiats. Bezopasn., 2008, no. 1, pp. 16–28.
Stefanovskii, S.V., Ptashkin, A.G., Knyazev, O.A., et al., Fiz. Khim. Obrab. Mater., 2008, no. 4, pp. 18–25.
Stefanovsky, S.V., Yudintsev, S.V., Perevalov, S.A., et al., J. Alloys Compds., 2007, vols. 444–445, pp. 618–620.
Laverov, N.P., Yudintsev, S.V., Velichkin, V.I., et al., Radiokhimiya, 2009, vol. 51, no. 5, pp. 463–468.
Stefanovskii, S.V., Lukinykh, A.N., Tomilin, S.V., et al., Fiz. Khim. Obrab. Mater., 2007, no. 6, pp. 32–36.
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Original Russian Text © N.P. Laverov, S.V. Yudintsev, S.V. Stefanovskii, B.I. Omel’yanenko, B.S. Nikonov, 2011, published in Radiokhimiya, 2011, Vol. 53, No. 3, pp. 196–207.
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Laverov, N.P., Yudintsev, S.V., Stefanovskii, S.V. et al. Murataite matrices for actinide wastes. Radiochemistry 53, 229–243 (2011). https://doi.org/10.1134/S1066362211030027
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DOI: https://doi.org/10.1134/S1066362211030027