Leaching and Comprehensive Regulatory Performance Testing of an Extruded Bitumen Containing a Surrogate, Sodium Nitrate-Based, Low-Level Waste

Résumé du livre

Performance test results obtained from laboratory testing of an extruded bitumen containing a surrogate, sodium nitrate-based waste are presented. A relatively viscous form of oxidized bitumen (ASTM D 312, Type III) has been tested and has been shown to meet all of the current regulatory performance criteria. Molded specimens were obtained using a 53-mm Werner & Pfleiderer extruder, operated by personnel of WasteChem Corporation of Paramus, New Jersey. A surrogate, low-level, mixed, liquid waste, formulated to represent an actual on-site waste at the Oak Ridge National Laboratory, was used. The surrogate waste contained 30 weight percent sodium nitrate, in addition to eight heavy metals, cold cesium, and strontium. Waste form specimens contained three levels of waste loading: 40, 50, and 60 weight percent salt. Results include thermal testing, extraction procedure toxicity tests, and 90-day American Nuclear Society 16.1 leach tests, as well as compressive strength tests.