Matrices for immobilization of the rare earth–actinide waste fraction, synthesized by cold crucible induction melting
The structure of eight samples containing simulated rare earth–actinide fraction of high-level waste was studied. Samples of weight from 0.2 to 6 kg were prepared by cold crucible induction melting followed by crystallization of the melt. The target phases (britholite, pyrochlore, zirconolite, rhomb...
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| Veröffentlicht in: | Radiochemistry (New York, N.Y.) N.Y.), 2015-05, Vol.57 (3), p.321-333 |
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| container_title | Radiochemistry (New York, N.Y.) |
| container_volume | 57 |
| creator | Yudintsev, S. V. Stefanovsky, S. V. Kalenova, M. Yu Nikonov, B. S. Nikol’skii, M. S. Koshcheev, A. M. Shchepin, A. S. |
| description | The structure of eight samples containing simulated rare earth–actinide fraction of high-level waste was studied. Samples of weight from 0.2 to 6 kg were prepared by cold crucible induction melting followed by crystallization of the melt. The target phases (britholite, pyrochlore, zirconolite, rhombic and monoclinic rare earth titanates) prevail in all the matrices; glass, zirconolite, and rutile were detected as impurities, sometimes in significant amounts. These phases do not contain waste components (rutile) or are stable in solutions (zirconolite); therefore, their presence should not impair the properties of the matrix. The possibility of controlling the phase composition of the matrix by introducing zirconium or aluminum oxide into the charge was demonstrated. |
| doi_str_mv | 10.1134/S1066362215030133 |
| format | Article |
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| subjects | Chemistry Chemistry and Materials Science Chemistry/Food Science Nuclear Chemistry |
| title | Matrices for immobilization of the rare earth–actinide waste fraction, synthesized by cold crucible induction melting |
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