Influence of temperature on strength of cemented surrogate nitrate salt waste
Conference
·
OSTI ID:6668784
The Rocky Flats Plant (RFP) generates large volumes of a low level aqueous waste stream high in nitrate salts. The aqueous waste is concentrated by evaporation and then mixed with Portland cement prior to transport and disposal. Planned process upgrades include a new horizontal thin film evaporator. Temperature of brine at discharge end of the new evaporator will be near boiling point. Introduction of hot water to cement can degrade the monolithic waste form. However, the RFP salt waste contains high concentrations of compounds known to retard hydration. This paper discusses impact of introducing high temperature waste to cement. The study evaluated three waste compositions: (1) highest probable nitrate composition, (2) highest probable chloride composition, and (3) current composition. Results showed that compressive strength of final waste form increased with brine temperature, and waste forms from brine at the boiling point exhibited a near doubling of compressive strength when compared to waste forms from brine at room temperature.
- Research Organization:
- EG and G Rocky Flats, Inc., Golden, CO (United States). Rocky Flats Plant
- Sponsoring Organization:
- DOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC34-90DP62349
- OSTI ID:
- 6668784
- Report Number(s):
- RFP-4623; CONF-930396--3; ON: DE93008805
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
052001* -- Nuclear Fuels-- Waste Processing
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
BRINES
BUILDING MATERIALS
CEMENTS
CHEMICAL COMPOSITION
CHLORIDES
CHLORINE COMPOUNDS
COMPRESSION STRENGTH
DRYING
EVAPORATION
HALIDES
HALOGEN COMPOUNDS
MANAGEMENT
MATERIALS
MECHANICAL PROPERTIES
NATIONAL ORGANIZATIONS
NITRATES
NITROGEN COMPOUNDS
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
PROCESSING
RADIOACTIVE WASTE MANAGEMENT
RADIOACTIVE WASTE PROCESSING
ROCKY FLATS PLANT
SALTS
US AEC
US DOE
US ERDA
US ORGANIZATIONS
WASTE FORMS
WASTE MANAGEMENT
WASTE PROCESSING
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
BRINES
BUILDING MATERIALS
CEMENTS
CHEMICAL COMPOSITION
CHLORIDES
CHLORINE COMPOUNDS
COMPRESSION STRENGTH
DRYING
EVAPORATION
HALIDES
HALOGEN COMPOUNDS
MANAGEMENT
MATERIALS
MECHANICAL PROPERTIES
NATIONAL ORGANIZATIONS
NITRATES
NITROGEN COMPOUNDS
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
PROCESSING
RADIOACTIVE WASTE MANAGEMENT
RADIOACTIVE WASTE PROCESSING
ROCKY FLATS PLANT
SALTS
US AEC
US DOE
US ERDA
US ORGANIZATIONS
WASTE FORMS
WASTE MANAGEMENT
WASTE PROCESSING