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

Patent ·
OSTI ID:871053
 [1];  [2]
  1. 21 Barnes Road, Wading River, NY 11792
  2. 44 N. Pinelake Dr., Patchogue, NY 11772
+ Show Author Affiliations

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.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY
DOE Contract Number:
AC02-76CH00016
Assignee:
Kalb, Paul D. (21 Barnes Road, Wading River, NY 11792);Colombo, Peter (44 N. Pinelake Dr., Patchogue, NY 11772)
Patent Number(s):
US 5649323
OSTI ID:
871053
Country of Publication:
United States
Language:
English

References (7)

Equipment evaluation for low density polyethylene encapsulated nitrate salt waste at the Rocky Flats Plant report August 1993
Polyethylene encapsulatin of nitrate salt wastes: Waste form stability, process scale-up, and economics report July 1991
Polyethylene encapsulation of simulated blowdown waste for SEG treatability study. Letter report on Phase I screening: Waste treatment and specimen preparation report August 1993
Long-Term Durability of Polyethylene for Encapsulation of Low-Level Radioactive, Hazardous, and Mixed Wastes book February 1993
Polyethylene solidification of low-level wastes report February 1985
Polyethylene encapsulation of single-shell tank low-level wastes. Annual progress report report September 1992
Polyethylene encapsulation of single-shell tank low-level wastes. FY-93 interim progress report report June 1993

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/588/252/976/
additive
allowed
anhydrous
anhydrous additive
clean
combining
combining substantially
composition
cool
directed
dispersion
disposal
dry
dry waste
encapsulation
environment
extruder
form
forming
hazardous
homogenous
homogenous molten
liner
matrix
mixed
mixed waste
mixed wastes
molten
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monolithic
monolithic waste
multibarrier
multibarrier encapsulation
non-biodegradable
non-biodegradable thermoplastic
plastic polymer
polyethylene
polyethylene liner
polymer
powder
preferably
process
provides
radioactive
simultaneously
simultaneously dry
stabilization
substantially
substantially simultaneous
substantially simultaneously
thermoplastic
thermoplastic polymer
waste
waste form
waste powder
wastes