Leachability of chelated ion-exchange resins solidified in cement or cement and fly ash
- Idaho National Engineering Lab., Idaho Falls (United States)
Leach tests were conducted at the Idaho National Engineering Laboratory on six small-scale specimens of cement-solidified ion-exchange resin wastes. The ion-exchange resins had been used to process reagent solutions following chemical decontaminations of primary coolant systems at five commercial light water reactors. The decontaminations were performed using the AP/Citrox, Can-Decon, Dow NS-1, and Low Oxidation-State Transition-Metal ION (LOMI) processes. The ion-exchange resin wastes were loaded with radionuclides, transition metals, and organic chelating agents, and were solidified in either unmodified Portland Type 1 cement or in a mixture of Portland Type 1 cement and fly ash. Waste-form specimens were leach-tested in deionized water at 23C using the American National Standards Institute/American Nuclear Society (ANSI/ANS) Standard 16.1 procedure. Release rates, effective diffusivities, and leachability indexes of radionuclides, chelating agents, and stable metals were determined using ANS-16.1 diffusion release models. Releases of radionuclides, chelating agents, and metals from waste forms that degraded during leaching were similar to releases from waste forms that maintained their physical integrity during leaching. The presence of chelating agents in the waste forms did not adversely affect the leachability of the waste forms.
- DOE Contract Number:
- AC07-76ID01570
- OSTI ID:
- 6509939
- Journal Information:
- Waste Management; (United States), Vol. 13:1; ISSN 0956-053X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
54 ENVIRONMENTAL SCIENCES
METALS
LEACHING
RADIOACTIVE WASTES
RESINS
SOLIDIFICATION
CHELATING AGENTS
DECONTAMINATION
FLY ASH
IDAHO NATIONAL ENGINEERING LABORATORY
ION EXCHANGE
REAGENTS
WASTE PROCESSING
WATER COOLED REACTORS
AEROSOL WASTES
ASHES
CLEANING
COMBUSTION PRODUCTS
DISSOLUTION
ELEMENTS
MANAGEMENT
MATERIALS
NATIONAL ORGANIZATIONS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PETROCHEMICALS
PETROLEUM PRODUCTS
PHASE TRANSFORMATIONS
POLYMERS
PROCESSING
RADIOACTIVE MATERIALS
REACTORS
RESIDUES
SEPARATION PROCESSES
US DOE
US ERDA
US ORGANIZATIONS
WASTE MANAGEMENT
WASTES
052001* - Nuclear Fuels- Waste Processing
540220 - Environment
Terrestrial- Chemicals Monitoring & Transport- (1990-)
540230 - Environment
Terrestrial- Radioactive Materials Monitoring & Transport- (1990-)