Compositions – Radioactive compositions
Patent
1983-08-19
1987-02-24
Lechert, Jr., Stephen J.
Compositions
Radioactive compositions
2505061, 252633, 264 05, 264332, 419 48, 419 51, G21F 916, G21F 912
Patent
active
046456244
ABSTRACT:
Particulate material is poured into a container which is decay and heat resistant, the container is sealed and subjected to axial compression at elevated temperature to cause densification of the material, there being an arrangement for preventing substantial radially outward deformation of the container during compression. An important application is to immobilization of nuclear reactor waste in a synthetic rock structure formed during the high temperature compression step, and advantageously the containers are secured within an outer metal cannister for subsequent safe handling and disposal. An important embodiment includes a bellows container which advantageously is upwardly pressed into an inverted metal cannister restrained by an upper abutment, the bellows container becoming an interference fit within the metal cannister during the final portion of compression, but the bellows container wall itself being substantially sufficient to prevent gross outward deformation of the bellows container.
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Hoenig et al., 1983, Densification Studies of Synroc D for High-Level Defense Waste, Lawrence Livermore National Laboratory, 55 pages.
Ringwood, A. et al. 1979, The Synroc Process: A Geochemical Approach to Nuclear Waste Immobilization, Geochemical Journal 13:141-165.
Ramm Eric J.
Ringwood Alfred E.
Australian Atomic Energy Commission
Lechert Jr. Stephen J.
Locker Howard J.
The Australian National University
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