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Iron Phosphate Glasses: An Alternative for Vitrifying Certain Nuclear Wastes. (Annual Report, June 1, 2003-May 31, 2004).

DE2005839298

Publication Date	2005
Personal Author	Day, D. E.; Kim, C. W.
Page Count	24
Abstract	The unusual properties and beneficial characteristics of iron phosphate glasses, as viewed from the standpoint of alternative glasses for vitrifying nuclear and hazardous wastes (which contain components that make them poorly suited for vitrification in borosilicate glass), have been investigated by the University of Missouri-Rolla with support from the Environmental Management Science Program (EMSP), DOE. During the past year, the corrosion resistance of Inconel 690 and 693 coupons submerged in an iron phosphate melt at 1050 degreesC for up to 155 days has been investigated to determine whether iron phosphate glasses could be melted in a Joule Heated Melter (JHM) equipped with such electrodes in the same manner as now being used to melt borosilicate glass. Substituting iron phosphate glasses for borosilicate glasses could significantly reduce the time and cost for clean up due to the higher waste loading possible in iron phosphate glass. The iron phosphate melt, which contained 30 wt% of the Hanford Low Activity Waste (LAW), did not corrode the Inconel 690 to any greater extent than what has been reported for Inconel 690 electrodes in the borosilicate melt in the JHM at the Defense Waste Processing Facility. Furthermore, Inconel 693 appeared to be an even better candidate for use in iron phosphate melts since its corrosion rate was only about one half that of Inconel 690. In the past year, the results of the research on iron phosphate glasses have been described in nine technical papers and one report and have been presented at four international and national meetings.
Keywords	Vitrification Iron phosphates Borosilicate glass Nuclear wastes Liquid wastes Tables (Data) Corrosion resistance Annual reports Radioactive waste disposal Department of Energy (DOE) Joule Heater Melter (JHM) Hanford Low Activity Waste (LAW)
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Missouri Univ.-Rolla. Materials Research Center.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200523

Iron Phosphate Glasses: An Alternative for Vitrifying Certain Nuclear Wastes. (Annual Report, June 1, 2003-May 31, 2004).

Iron Phosphate Glasses: An Alternative for Vitrifying Certain Nuclear Wastes. (Annual Report, June 1, 2003-May 31, 2004).
DE2005839298

Publication Date	2005
Personal Author	Day, D. E.; Kim, C. W.
Page Count	24
Abstract	The unusual properties and beneficial characteristics of iron phosphate glasses, as viewed from the standpoint of alternative glasses for vitrifying nuclear and hazardous wastes (which contain components that make them poorly suited for vitrification in borosilicate glass), have been investigated by the University of Missouri-Rolla with support from the Environmental Management Science Program (EMSP), DOE. During the past year, the corrosion resistance of Inconel 690 and 693 coupons submerged in an iron phosphate melt at 1050 degreesC for up to 155 days has been investigated to determine whether iron phosphate glasses could be melted in a Joule Heated Melter (JHM) equipped with such electrodes in the same manner as now being used to melt borosilicate glass. Substituting iron phosphate glasses for borosilicate glasses could significantly reduce the time and cost for clean up due to the higher waste loading possible in iron phosphate glass. The iron phosphate melt, which contained 30 wt% of the Hanford Low Activity Waste (LAW), did not corrode the Inconel 690 to any greater extent than what has been reported for Inconel 690 electrodes in the borosilicate melt in the JHM at the Defense Waste Processing Facility. Furthermore, Inconel 693 appeared to be an even better candidate for use in iron phosphate melts since its corrosion rate was only about one half that of Inconel 690. In the past year, the results of the research on iron phosphate glasses have been described in nine technical papers and one report and have been presented at four international and national meetings.
Keywords	Vitrification Iron phosphates Borosilicate glass Nuclear wastes Liquid wastes Tables (Data) Corrosion resistance Annual reports Radioactive waste disposal Department of Energy (DOE) Joule Heater Melter (JHM) Hanford Low Activity Waste (LAW)
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Missouri Univ.-Rolla. Materials Research Center.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200523