Leachability of decontamination reagents from cement waste forms
Brookhaven National Laboratory, in order to provide technical information needed by the US Nuclear Regulatory Commission to evaluate the adequacy of near-surface disposal of decontamination wstes, has begun to study the leachability of organic reagents from solidified simulated decontamination wastes. Laboratory-scale cement waste forms containing EDTA, picolinic acid or simulated LOMI decontamination reagent were leach tested. Samples containing an organic reagent on either mixed bed ion-exchange resins or anion exchange resins were tested. A fixed interval leach procedure was used, as well as the standard procedure ANS 16.1. The leachability indices measured for the release of the acid from resin/cement composites are: 10.1 for EDTA on mixed bed resins; 9.1 for picolinic acid on mixed bed resins; 9.2 for picolinic acid on anion exchange resins; 8.8 for picolinic acid in forms containing simulated low oxidation metallic ion (LOMI) reagent on mixed bed resins and 8.7 for picolinic acid in forms containing simulated LOMI reagent on anion exchange resins. The leachability indices measured varied with leach time and the data indicate that the release mechanism may not be simply diffusion controlled. 5 references, 2 tables.
- Research Organization:
- Brookhaven National Lab., Upton, NY (USA)
- DOE Contract Number:
- AC02-76CH00016
- OSTI ID:
- 6604587
- Report Number(s):
- BNL-NUREG-34897; CONF-841157-2; ON: TI84014348
- Resource Relation:
- Conference: Symposium on the scientific basis for nuclear waste management, Boston, MA, USA, 26 Nov 1984
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
EDTA
LEACHING
PICOLINIC ACID
PORTLAND CEMENT
STABILITY
WASTE FORMS
DECONTAMINATION
EXPERIMENTAL DATA
RADIOACTIVE WASTES
AMINO ACIDS
AZINES
BUILDING MATERIALS
CARBOXYLIC ACIDS
CEMENTS
CHELATING AGENTS
CLEANING
DATA
DISSOLUTION
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
INFORMATION
MATERIALS
NUMERICAL DATA
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PICOLINES
PYRIDINES
RADIOACTIVE MATERIALS
SEPARATION PROCESSES
WASTES
052002* - Nuclear Fuels- Waste Disposal & Storage
360604 - Materials- Corrosion
Erosion
& Degradation