LABORATORY DEVELOPMENT OF A POT CALCINATION PROCESS FOR CONVERTING LIQUID WASTES TO SOLIDS

Technical Report · Thu Sep 14 04:00:00 EDT 1961

OSTI ID:4841144

Godbee, H W; Roberts, J T

Simulated Darex, Purex, Thorex, and TBP-25 wastes were batch-evaporated and calcined to solids. The weight of residue was decreased to approximately 8% of the original waste for Darex, to approximately 4% for Purex, to approximately 2% for Thorex, and to approximately 7% for TBP-25 by calcination to 1200 deg C. Semicontinuous evaporation and calcination to solids at 900 deg C of Darex and Purex wastes gave volume reduction factors of approximately 8 and 7 to 10, respectively. The nitrate contents of the residues from batch calcination to 800 deg C were from approximately 0.07 to 0.5 wt.% while the nitrate contents of the residues from semicontinuous calcination to 900 deg C were from approximately 0.1 to 0.7 wt.%. Sodium, calcium, and magnesium additives to Purex waste decreased the percent of sulfate volatilized into the condensate from approximately 30% to <0.5%. Replacement of the atmosphere above the waste with nitric oxide decreased ruthenium volatility from 50 to 60% of that originally present in Purex waste to 0.5 to 3.5%. The thermal conductivities for the calcined wastes, measured in situ, were all>O.l Btu/hr ft deg F at approximately 400 deg F and increased almost linearly with increasing temperature to>O.3 Btu/hr ft deg F at approximately 1600 deg F in all cases studied. (auth)

• Research Organization: Oak Ridge National Lab., Tenn.
• DOE Contract Number: W-7405-ENG-26
• NSA Number: NSA-15-028852
• OSTI ID: 4841144
• Report Number(s): ORNL-2986
• Country of Publication: United States
• Language: English

Related Subjects

BUTYL PHOSPHATES
CALCINATION
CALCIUM
CONVERSION
DAREX PROCESS
EFFICIENCY
EVAPORATION
MAGNESIUM
NITRATES
NITROGEN OXIDES
PUREX PROCESS
SODIUM
SOLIDS
SULFATES
THERMAL CONDUCTIVITY
THOREX PROCESS
VOLATILITY
WASTE DISPOSAL AND PROCESSING
WASTE PROCESSING
WASTE SOLUTIONS