Novel chemically bonded phosphate ceramics (CBPCs) are being developed and fabricated for low-temperature stabilization and solidification of mixed waste streams which are not amenable to conventional high-temperature stabilization processes due to presence of volatiles such as heavy metal chloride and fluorides and/or pyrophorics in the wastes. Phosphates of Mg, Mg-Na and Z r are being developed as candidate matrix materials. In this paper, we present the fabrication procedures of phosphate waste forms using surrogates compositions of three typical mixed wastes streamsash, cement sludges, and salts. The performance of the final waste forms such as compression strength, leachability of the contaminants, durability in aqueous environment were conducted. In addition, parameteric studies have been conducted to establish the optimal waste loading in a particular binder system. Based on the results, we present potential applications in the treatment of various mixed waste streams.-* Work supported by US. Department of Energy, Office of Technology Development, as part of the Mixed Waste Integrated Program, under Contract W-3 1-109-Eng-38.

Novel chemically bonded phosphate ceramics (CBPCs) are being developed and fabricated for low-temperature stabilization and solidification of mixed waste streams which are not amenable to conventional high-temperature stabilization processes due to presence of volatiles such as heavy metal chloride and fluorides and/or pyrophorics in the wastes. Phosphates of Mg, Mg-Na and Z r are being developed as candidate matrix materials. In this paper, we present the fabrication procedures of phosphate waste forms using surrogates compositions of three typical mixed wastes streamsash, cement sludges, and salts. The performance of the final waste forms such as compression strength, leachability of the contaminants, durability in aqueous environment were conducted. In addition, parameteric studies have been conducted to establish the optimal waste loading in a particular binder system. Based on the results, we present potential applications in the treatment of various mixed waste streams.-* Work supported by US. Department of Energy, Office of Technology Development, as part of the Mixed Waste Integrated Program, under Contract W-3 1-109-Eng-38.

Intended to evaluate the chemical durability of ASTM-Type I water at 90°C (194°F) for 7 days at homogeneous and devitrified glasses to evaluate liquid:solid=10, product consistency. Developed Ibr high l,_vel waste. Method B: Allows use of varying leachant types, durations, temperatures, and liquid:solid ratio. a. Ali liquid to solid ratios are for liquid volume in mL and solid weight in g.

The System Design Study (SDS), part of the Waste Technology Development Department at Idaho National Engineering Laboratory (INEL), examined techniques _vailable for the remediation of hazardous and transuranic (TRU) waste stored at the Radioactive Waste Management Complex's (RWMC's) Subsurface Disposal Area (SDA) at INEL. Using specific technologies, system concepts for treating the buried waste and the surroundingcontaminated soil were evaluated. Evaluation included implementability,effectiveness,and cost. SDS resulted in the development of technologyrequirements including demonstration,testing and evaluation activities needed for implementingeach concept. The SDS results are published in eight volumes. Volume I contains an executive summary. The SDS summary and analysis of results are presented in Volume II. Volumes III through VII contain detailed descriptions of twelve system and four subsystem concepts. Volume VIII contains the appendices.

Land Disposal Restrictions LLMW low-level mixed waste MWIP Mixed Waste Integrated Program MWTP Mixed Waste Treatment Project NRC Nuclear Regulatory Commission PHP Plasma Hearth Process 8 POHCs Principal Organic Hazardous Constituent Pu plutonium PVC Polyvinylchloride RCRA Resource Conservation and Recovery Act RDDT&E Research Development Demonstration Testing and Evaluation RFP Rocky Flats Plant SRP Savannah River Plant TRU transuranic TSCA Toxic Substances Control Act TVA Tennessee Valley Authority WHC Westinghouse Hanford Company vii ACKNOWLEDGMENTS We wish to thankmembers of the Mixed Waste TreatmentProject for providing the mixed waste stream classification system and for their help in identifying waste streampriorities for surrogateformulation.Members of the Mixed Waste IntegratedProgram and their associates provided insight into the waste stream definition and probable matrix constituents. These colleagues include B. C.