Encapsulation of radioactive waste using a sodium silicate based glass matrix
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United States of America Patent
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Jul 10, 2007
Grant Date -
Dec 30, 2004
app pub date -
Jul 22, 2002
filing date -
Aug 3, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention relates to an immobilizing medium for the encapsulation of radioactive waste. The waste immobilizing medium has a sodium silicate based glass matrix in which there is contained radioactive waste wherein the waste comprises one or more inert metal components and one or more fission products. At least a portion of the inert metal components are dissolved in the glass matrix and increase its durability. As a result, the waste immobilising medium is highly durable and leach resistant and is suitable for long term storage of radioactive waste. The inert metal components preferably comprise iron, nickel and chromium.
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