1. Introduction. - 2. Radioactive Waste Management. - Objectives of the National Waste Terminal Storage Program. - International Programs. - 3. Natural Radiation in the Geochemical Environment. - Geochemical Environment. - Background Radiation. - Some Comments. - 4. Types of Radioactive Waste and the Multibarrier System. - Radioactive Wastes. - The Multibarrier Concept. - Uncertainties and Their Resolution. - Criticality. - Summary. - 5. Geochronology and Radwaste. - The Importance of Radiometric Age Determinations. - Uranium-Ruthenium Age Determination. - Importance of Combined U-Pb Th-Pb K-Ar and Rb-Sr Ages. - HLW-TRU Radionuclide Behavior in Rock Systems: Evidence from Oklo and Other Sources. - Some Conclusions. - 6. Geologic Sites: Generic Cases. - Geologic Disposal of Radioactive Wastes. - Geohydrologic Considerations. - Concluding Statement. - 7. Geologic Repositories: Specific Sites. - The Waste Isolation Pilot Plant Site. - The Basalt Waste Isolation Plant Site. - The Climax Granite of the Nevada Test Site. - Tuffaceous Rocks of the Nevada Test Site. - Bedded Salts of the Paradox Basin Area. - Salt Domes of the Gulf Coastal Region. - Some Conclusions. - 8. Alternate Plans for Waste Disposal. - Subseabed Disposal. - Other Alternate Waste Disposal Proposals. - Conclusions. - 9. Low Level Radioactive Wastes and Their Siting. - Low-Level Radioactive Wastes. - LLW Handling and Treatment. - Use of Poisoned Land/Inland Seas for Low-Level Radioactive Waste Disposal. - Transportation. - Decommissioning. - Interim Storage of Commercial Low-Level Radioactive Waste. - Conclusions. - 10. Uranium Milling and Mill Talings. - Uranium Milling. - Uranium Mill Tailings. - Conclusions. - 11. Natural Analogs. - Eh-pH Diagrams. - Oklo Studies. - Studies of the Eldora-Bryan Stock: Idaho Springs Formation Colorado. - Alamosa River Stock-Platoro Complex Studies. - Other Analogs. - Conclusions. - 12. Waste Forms. - Glasses. - Crystalline Waste Forms. - Composite Waste Forms. - Properties of Waste-Form Materials. - Leaching. - Conclusions. - 13. Engineered Backfill and Canisters. - Engineered Backfill. - Canister and Other Corrosion-Resistant Structural Components. - Conclusions. - 14. Toxicity. - Geotoxicity Index. - Data for GHI Calculations. - Concluding Statements. - 15. Conclusions. - References. Language: English