Glass as a Waste Form and Vitrification Technology Summary of an International Workshop (1996) / Chapter Skim
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Appendix D Identification and Summary of Characterization of Materials Potentially Requiring Vitrification
Appendix D Identification and Summary of Characterization of Materials Potentially Requiring Vitrification
Pages 39-52
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From page 39... ...
May 13, 1996 Prepared by the Oak Ridge National Laboratory Oak Ridge, Tennessee 3783 ~ -6285 managed by LOCKHEED MARTIN ENERGY RESEARCH CORPORATION for the U.S. DEPARTMENT OF ENERGY under contract DE-AC05-960R22464 PREFACE What follows constitutes background information for the Glass as a Waste Form and Vitrification Technology International Workshop in general and the presentation entitled "T6entif~cation and Summary Characterization of Materials Potentially Requiring Vitrification", given during the first morning of the workshop.
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From page 41... ...
Description Basic component is afiuei rod orbed element, which is a stack of r~ght-circular cylindrical uranium dioxide fuel pellets In a welded Zircaloy tube. Zircaloy is a metal alloy composed primarily of zirconium with small amounts of tin and iron.
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From page 42... ...
The largest amount of this material is unreprocessed production reactor fuel stored in basins at Hanford and contains about 2,00 MgU. A substantial amount of Al-ciad fuels is stored at Savannah River Site.
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From page 43... ...
Additionally, some of the tank wastes have been farther separated and concentrated. There is now about 380,000 m3 of radioactive mixed waste stored in 332 taIlks at Savannah River Site, Hanford Site, Idaho Chemical Processing Plant, West Valley Demonstration Project, and Oak Ridge National Laboratory.
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From page 45... ...
APPENDIX~CHARA CTERIZ:A TION OF MA TERIALS 4. Capsules of Separated Radiocesium and Radiostrontium Genesis D.7 During the late 1960s and 1970s, the contents of many Hanford tanks were recovered and chemically processed to remove radiocesium and radiostrontium, after which the wastes were returned to the tanks.
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From page 46... ...
TRU wastes are also further subclassified as to whether they are "mixed" wastes by virtue of containing chemically hazardous constituents regulated under the Resource Conservation and Recovery Act (primarily) , but also the Toxic Substances Control Act or various state regulations.
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From page 47... ...
In addition, a large amount of DOE LLW has been produced by the processing of materials related to the production of nuclear weapons, which has no parallels In the commercial sector. This includes not only general process wastes, but also unusual waste forms such as grouted LLW resulting from the processing of high-level waste at the Savannah River Site and grouted waste that was injected into the earth at Oak Ridge National Laboratory.
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From page 48... ...
Although not specifically denominated as such, many wastes in earlier sections are actually mixed wastes. in particular, tank wastes and many transuranic wastes contain hazardous chemicals that result in their being considered to be mixed.
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From page 49... ...
convert the Pu to the oxide, fabricate it into spent fuel, irradiate it In lightwater reactors, and then dispose of it in a repository as spent fuel, or (b) incorporate the Pu directly into a waste form for subsequent disposal In a repository.
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From page 50... ...
Description Environmental restoration wastes are not well characterized because: in situ legacy contents are often not well characterized concerning the nature of the materials and spread of contamination the processes by which D&D of facilities will be accomplished is not yet known; thus, the secondary waste streams have not yet been defined. Taken as a whole, environmental restoration wastes are projected to be less heavily contaminated and more heterogeneous than other waste types.
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From page 51... ...
DOE, 199Sa, Integrated Data Base Report-1994: U.S. Spent Nuclear Fuel and Radioactive Waste Inventories, Projections, and Characteristics, DOE/RW-0006, Rev.
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From page 52... ...
Sears, M B., et al., 1990, Sampling and Analysis of Radioactive Liquid Wastes and Sludges in the Melton Valley and Evaporator Facility Storage Tanks at ORNL, ORNL/TM- 1 1652.
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