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Title: Composition and process for the encapsulation and stabilization of radioactive hazardous and mixed wastes

The present invention provides a composition and process for disposal of radioactive, hazardous and mixed wastes. The present invention preferably includes a process for multibarrier encapsulation of radioactive, hazardous and mixed wastes by combining substantially simultaneously dry waste powder, a non-biodegradable thermoplastic polymer and an anhydrous additive in an extruder to form a homogenous molten matrix. The molten matrix may be directed in a "clean" polyethylene liner, allowed to cool, thus forming a monolithic waste form which provides a multibarrier to the dispersion of wastes into the environment.
 [1];  [2]
  1. (21 Barnes Road, Wading River, NY 11792)
  2. (44 N. Pinelake Dr., Patchogue, NY 11772)
Issue Date:
OSTI Identifier:
Kalb, Paul D. (21 Barnes Road, Wading River, NY 11792);Colombo, Peter (44 N. Pinelake Dr., Patchogue, NY 11772) BNL
Patent Number(s):
US 5649323
Contract Number:
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY
Country of Publication:
United States
composition; process; encapsulation; stabilization; radioactive; hazardous; mixed; wastes; provides; disposal; preferably; multibarrier; combining; substantially; simultaneously; dry; waste; powder; non-biodegradable; thermoplastic; polymer; anhydrous; additive; extruder; form; homogenous; molten; matrix; directed; clean; polyethylene; liner; allowed; cool; forming; monolithic; dispersion; environment; molten matrix; monolithic waste; waste form; mixed waste; mixed wastes; substantially simultaneously; thermoplastic polymer; multibarrier encapsulation; simultaneously dry; waste powder; anhydrous additive; polyethylene liner; non-biodegradable thermoplastic; combining substantially; dry waste; homogenous molten; substantially simultaneous; plastic polymer; /588/252/976/