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), Journal Name: Waste Management; (United States) Vol. 13:1; ISSN WAMAE2; ISSN 0956-053X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
54 ENVIRONMENTAL SCIENCES
540220 -- Environment
Terrestrial-- Chemicals Monitoring & Transport-- (1990-)
540230 -- Environment
Terrestrial-- Radioactive Materials Monitoring & Transport-- (1990-)
AEROSOL WASTES
ASHES
CHELATING AGENTS
CLEANING
COMBUSTION PRODUCTS
DECONTAMINATION
DISSOLUTION
ELEMENTS
FLY ASH
IDAHO NATIONAL ENGINEERING LABORATORY
ION EXCHANGE
LEACHING
MANAGEMENT
MATERIALS
METALS
NATIONAL ORGANIZATIONS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PETROCHEMICALS
PETROLEUM PRODUCTS
PHASE TRANSFORMATIONS
POLYMERS
PROCESSING
RADIOACTIVE MATERIALS
RADIOACTIVE WASTES
REACTORS
REAGENTS
RESIDUES
RESINS
SEPARATION PROCESSES
SOLIDIFICATION
US DOE
US ERDA
US ORGANIZATIONS
WASTE MANAGEMENT
WASTE PROCESSING
WASTES
WATER COOLED REACTORS