Polyethylene encapsulation of single-shell tank low-level wastes

Polyethylene encapsulation of single-shell tank low-level wastes [electronic resource]

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This report describes work supported by the UST-ID, conducted at Brookhaven National Laboratory I (BNL), to develop and demonstrate a polyethylene waste encapsulation process for low-level radioactive (LLW) and hazardous mixed wastes (HMW) stored in underground tanks. During FY 1992, studies were co...

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Bibliographic Details
Online Access: Online Access
Corporate Author: Brookhaven National Laboratory (Researcher)
Format: Government Document Electronic eBook
Language:English
Published: Washington, D.C. : Oak Ridge, Tenn. : United States. Dept. of Defense ; distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 1992.
Subjects:
Beta Decay Radioisotopes.
Information.
Corrosion.
Sodium Nitrates.
Grouting.
Hazardous Materials.
Document Types.
Containers.
Idaho National Engineering Laboratory.
Encapsulation.
Even-even Nuclei.
Cesium 137.
National Organizations.
Testing.
Isotopes.
Nondestructive Testing.
Organic Polymers.
Remedial Action.
Us Organizations.
Progress Report.
Materials Testing.
Numerical Data.
Irradiation.
Sludges.
Ornl.
Polyolefins.
Chemical Reactions.
Strontium 90.
Waste Forms.
Radioactive Materials.
Radioisotopes.
Polyethylenes.
Compiled Data.
Tanks.
Organic Compounds.
Polymers.
Us Doe.
Savannah River Plant.
Alkaline Earth Isotopes.
Separation Processes.
Beta-minus Decay Radioisotopes.
Low-level Radioactive Wastes.
Wastes.
Sodium Compounds.
Oxygen Compounds.
Salts.
Us Aec.
Intermediate Mass Nuclei.
Materials.
Odd-even Nuclei.
Alkali Metal Isotopes.
Cesium Isotopes.
Nitrates.
Radioactive Wastes.
Hanford Reservation.
Strontium Isotopes.
Diffusion.
Thermal Testing.
Truex Process.
Leaching.
Chemical Analysis.
Dissolution.
Alkali Metal Compounds.
Us Erda.
Nitrogen Compounds.
Data.
Nuclei.
Years Living Radioisotopes.
Management Of Radioactive And Non-radioactive Wastes From Nuclear Facilities.
Description
Summary:This report describes work supported by the UST-ID, conducted at Brookhaven National Laboratory I (BNL), to develop and demonstrate a polyethylene waste encapsulation process for low-level radioactive (LLW) and hazardous mixed wastes (HMW) stored in underground tanks. During FY 1992, studies were completed on the effects of elevated temperature on waste form integrity, strength and leachability. No changes in waste form integrity or compressive yield strength were detected after storing polyethylene waste forms containing 50, 60 and 70 wt% sodium nitrate at 70[degree]C for 3 months. Leaching of polyethylene waste forms with similar nitrate salt loadings at temperatures up to 70[degree]C resulted in slight increases in leachability (< a factor of 2), compared with leaching at ambient temperatures. Leaching of sodium nitrate from polyethylene waste forms was diffusion-controlled, enabling extrapolation of laboratory leach data to full-scale waste forms over long time periods. Full-scale polyethylene waste forms containing 50 to 70 wt% nitrate salt could be expected to leach a total of 5% to 17% of the original contaminant source term after 300 years of leaching under worst-case (70[degree]C, fully saturated) conditions. This is about 25 to 75 times lower leachability than conventional cement grout waste forms containing a maximum of 20 wt% nitrate salts.
Item Description:Published through the Information Bridge: DOE Scientific and Technical Information.
09/01/1992.
"bnl-52365"
"DE93012805"
Cassidy, J.; Kalb, P.D.; Colombo, P.; Heiser, J. III; Franz, E.M.; Fuhrmann, M.; Pietrzak, R.; Klages, J.
Physical Description:Pages: (53 p) : digital, PDF file.

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