Selection of the treatment method for the West Valley alkaline supernatant
As part of the West Valley Demonstration Project (WVDP), th PUREX supernatant stored in Tank 8d-2 will be partially decontaminated before encapsulation in the final glass form. This report discusses selection of a method for removing Cs-137, the major radioactive ion in the supernatant. Methods considered were: (1) electrodialysis; (2) hyperfiltration; (3) precipitation with ferrocyanide, NaTPB, or PTA; (4) organic ion exchange using Cs-100 or a biologically derived media; (5) chelation using DeVoe/Holbein compostions; and (6) inorganic ion exchange using Durasil, natural zeolities, IE-95 or IE-96 media. Several different methods of using inorganic ion exchange media were also reviewed including (1) four columns with elution, and (2) two, three, or four columns without elution. After the careful evaluation of experimental data with all process constraints taken into account, the inorganic exchange media IE-96 (Linde Ionsiv IE-96 synthetic zeolite) was chosen for WVDP cesium recovery. IE-96 was chosen for the following reasons: high sorption rate, a decontamination factor (DF) over 1000, excellent exchange capacity at WVDP conditions, compatability with the glass formers used for borosilicate glass in direct melter feed applications, and a history of successful application in radio chemical seperation for waste streams. 34 refs., 29 figs., 27 tabs.
- Research Organization:
- West Valley Nuclear Services Co., Inc., West Valley, NY (USA)
- DOE Contract Number:
- AC07-81NE44139
- OSTI ID:
- 5026905
- Report Number(s):
- DOE/NE/44139-25; ON: DE88008936
- Country of Publication:
- United States
- Language:
- English
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ALKALI METAL COMPOUNDS
ALKALI METAL ISOTOPES
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BORON COMPOUNDS
CESIUM 137
CESIUM ISOTOPES
CLEANING
COMPARATIVE EVALUATIONS
COMPLEXES
DATA
DECONTAMINATION
DIALYSIS
ELECTRODIALYSIS
EXPERIMENTAL DATA
FERROCYANIDES
FILTRATION
INFORMATION
INORGANIC COMPOUNDS
INORGANIC ION EXCHANGERS
ION EXCHANGE
ION EXCHANGE MATERIALS
IRON COMPLEXES
ISOTOPES
MATERIALS
MICROORGANISMS
MINERALS
NUCLEI
NUMERICAL DATA
ODD-EVEN NUCLEI
ORGANIC COMPOUNDS
POLYMERS
PRECIPITATION
PUREX PROCESS
RADIOACTIVE MATERIALS
RADIOACTIVE WASTES
RADIOISOTOPES
RECOVERY
REFRACTORY METAL COMPOUNDS
REPROCESSING
SEPARATION PROCESSES
SODIUM COMPOUNDS
SORPTIVE PROPERTIES
SURFACE PROPERTIES
THERMODYNAMICS
TRANSITION ELEMENT COMPLEXES
TRANSITION ELEMENT COMPOUNDS
TUNGSTEN COMPOUNDS
WASTES
YEARS LIVING RADIOISOTOPES
ZEOLITES