Coating crystalline nuclear waste forms to improve inertness
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
- Resource Relation:
- Conference: 83. symposium on nucleation and crystallization in glasses, Washington, DC, USA, 3 May 1981
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
COATINGS
MATERIALS TESTING
PYROLYTIC CARBON
CHEMICAL VAPOR DEPOSITION
LEACHING
RADIOACTIVE WASTE PROCESSING
SOLIDIFICATION
SILICON CARBIDES
HIGH-LEVEL RADIOACTIVE WASTES
MICROSPHERES
SIMULATION
SOL-GEL PROCESS
CARBIDES
CARBON
CARBON COMPOUNDS
CHEMICAL COATING
DEPOSITION
DISSOLUTION
ELEMENTS
MANAGEMENT
MATERIALS
NONMETALS
PHASE TRANSFORMATIONS
PROCESSING
RADIOACTIVE MATERIALS
RADIOACTIVE WASTES
SEPARATION PROCESSES
SILICON COMPOUNDS
SURFACE COATING
TESTING
WASTE MANAGEMENT
WASTE PROCESSING
WASTES
052001* - Nuclear Fuels- Waste Processing
360205 - Ceramics
Cermets
& Refractories- Corrosion & Erosion