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Experimental Glass-Ceramic Products to Immobilize ICPP HLW

Published online by Cambridge University Press:  28 February 2011

Roseanne S. Baker ,
Bruce A. Staples ,
Dieter A. Knecht  and
Julius R. Berreth
Roseanne S. Baker
Affiliation:
Westinghouse Idaho Nuclear Company, Inc., Idaho National Engineering Laboratory, P. O. Box 4000, Idaho Falls, ID 83403
Bruce A. Staples
Affiliation:
Westinghouse Idaho Nuclear Company, Inc., Idaho National Engineering Laboratory, P. O. Box 4000, Idaho Falls, ID 83403
Dieter A. Knecht
Affiliation:
Westinghouse Idaho Nuclear Company, Inc., Idaho National Engineering Laboratory, P. O. Box 4000, Idaho Falls, ID 83403
Julius R. Berreth
Affiliation:
Westinghouse Idaho Nuclear Company, Inc., Idaho National Engineering Laboratory, P. O. Box 4000, Idaho Falls, ID 83403
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Abstract

Candidate products are being evaluated to immobilize the routinely calcined waste at the Idaho Chemical Processing Plant (ICPP). A potential product with minimal volume for immobilizing ICPP high-level waste (HLW) for final disposal is a high-waste-loading and high-density glass-ceramic. Glass-ceramics are formed by Hot Isostatic Pressing (HIPing) the HLW with selected additives, such as SiO2, B2O3, Li2O, Na2O, and Y2O3. Glass-ceramic products have been formed with calcine loa ings up to 80 wt% and densities up to 3.4 g/cm3. Crystalline phases observed in the glass-ceramic products include calcium fluoride, monoclinic and cubic zirconia, calcium- and yttrium-stabilized zirconia, and zircon. An interstitial amorphous phase also exists consisting of the oxides of silicon, aluminum, boron, and alkalis. The glass-ceramic waste forms give leach rates comparable to simulated HLW glass products.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 112: Symposium P – Scientific Basis for Nuclear Waste Management XI , 1987 , 53
Copyright
Copyright © Materials Research Society 1988

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