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The United States Department of Energy (DOE) has approximately 400 million liters (100 million gallons) of liquid high-level waste (HLW) stored in underground tanks and approximately 4,000 cubic meters of solid HLW stored in bins. The current DOE estimate of the cost of converting these liquid and solid wastes into stable forms for shipment to a geological repository exceeds $50 billion to be spent over several decades (DOE, 2000). The Committee on Long-Term Research Needs for Radioactive High-Level Waste at Department of Energy Sites was appointed by the National Research Council (NRC) to advise the Environmental Management Science Program (EMSP) on a long-term research agenda addressing the above problems related to HLW stored in tanks and bins at DOE sites.

This book addresses remedial action and waste management problems that the DOE and the nation are now facing that are the result of 50 years of nuclear weapons development and testingâ€"problems that require a reengineering of systems and a reexamination of the scientific, engineering, and institutional barriers to achieving cost-effective and safe stewardship of the nation's resources. Improving the Environment evaluates the DOE's environmental management program in four areas: regulatory measures, organization and management, priority-setting, timing and staging, and science and technology.