Compositions – Radioactive compositions
Patent
1982-09-30
1985-08-13
Padgett, Ben R.
Compositions
Radioactive compositions
252628, 252633, 264 05, G21F 916
Patent
active
045348936
ABSTRACT:
A process for solidifying radioactive wastes by producing compact blocks which are to be disposed in transporting or permanent storage containers. The compact blocks are produced from prefabricated ceramic tablets which contain radioactive substances and a matrix which continuously surrounds these ceramic tablets and is solid in its final state. Glass powder or a mixture of oxidic non-clay minerals or a mixture of both is used as the matrix material. The ceramic tablets and the matrix material are filled into the container and are compressed. The resulting compressed mixture is heated to a temperature in the range from 1423.degree. K. to 1623.degree. K., is held at this temperate range for one to three hours, and is finally gradually cooled to room temperature.
REFERENCES:
patent: 3000072 (1961-09-01), Evans
patent: 4172807 (1979-10-01), Larker
patent: 4297304 (1981-10-01), Scheffler et al.
patent: 4312774 (1982-01-01), Macedo et al.
patent: 4354954 (1982-10-01), Koster
patent: 4362659 (1982-12-01), Macedo et al.
patent: 4376070 (1983-03-01), Pope et al.
Deutsche Industrienorm DIN Nr. 12111, 2 pages.
Gonzalez-Oliver et al., 1981, Glass Ceramic Formation and the Preparation of Glasses by the Sol-Gel Method, Glass: 304-307.
Yoldas, B., 1977, Preparation of Glasses and Ceramics from Metal-Organic Compounds, Journal of Materials Science, 12: 1203-1208.
Yoldas, B., 1979, Monolithic Glass Formation by Chemical Polymerization, Journal of Materials Science, 14: 1843-1849.
Dippel Theodor
Loida Andreas
Kernforschungszentrum Karlsruhe GmbH
Locker Howard J.
Padgett Ben R.
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