Coating crystalline nuclear waste forms to improve inertness

Conference · Thu Jan 01 04:00:00 EST 1981

OSTI ID:5087604

Stinton, D P; Angelini, P; Caputo, A J; Lackey, W J

Crystalline waste forms of high simulated waste loading were successfully coated with layers of pyrolytic carbon and silicon carbide. Sol-gel technology was used to produce microspheres that contained simulated waste. A separate process for cesium immobilization was developed, which loads 5 wt % Cs onto zeolite particles for subsequent coating. The chemical vapor deposition process was developed for depositing thin layers of carbon and silicon carbide onto particles in a fluidized-bed coater. Pyrolytic carbon-coated particles were extremely inert in numerous leach tests. Aqueous leach test results of coated waste forms were below detection limits of such sensitive analytical techniques as atomic absorption and inductively coupled plasma atomic emission.

• Research Organization: Oak Ridge National Lab., TN (USA)
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 5087604
• Report Number(s): CONF-810528-16; ON: DE82015675
• Country of Publication: United States
• Language: English

Related Subjects

052001* -- Nuclear Fuels-- Waste Processing
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
36 MATERIALS SCIENCE
360205 -- Ceramics
Cermets
& Refractories-- Corrosion & Erosion
CARBIDES
CARBON
CARBON COMPOUNDS
CHEMICAL COATING
CHEMICAL VAPOR DEPOSITION
COATINGS
DEPOSITION
DISSOLUTION
ELEMENTS
HIGH-LEVEL RADIOACTIVE WASTES
LEACHING
MANAGEMENT
MATERIALS
MATERIALS TESTING
MICROSPHERES
NONMETALS
PHASE TRANSFORMATIONS
PROCESSING
PYROLYTIC CARBON
RADIOACTIVE MATERIALS
RADIOACTIVE WASTE PROCESSING
RADIOACTIVE WASTES
SEPARATION PROCESSES
SILICON CARBIDES
SILICON COMPOUNDS
SIMULATION
SOL-GEL PROCESS
SOLIDIFICATION
SURFACE COATING
TESTING
WASTE MANAGEMENT
WASTE PROCESSING
WASTES