Materials for high-level waste canister/overpacks in salt formations
Studies on the corrosion and mechanical behavior of TiCode-12 and other titanium alloys to be used as candidate canister or overpack barriers in a high-level waste (HLW) repository or test facility in salt have been in progress at Sandia National Laboratories since 1976. Titanium alloys were selected as the primary materials for detailed testing based on candidate screening analyses (general corrosion and economic assessments) of about 20 different alloys. The corrosion behavior of TiCode-12 has been evaluated as a function of: brine composition, temperature, time, pH, oxygen concentration, and gamma radiolysis. Uniform corrosion rates are in the range of 0.1 to 10 ..mu..m/yr; no significant pitting or crevice corrosion has been observed. This can be compared to the long-term measured rate of 0.13 mm/yr for ductile cast iron in Brine A, analyzed as a corrosion allowance canister material.
- Research Organization:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- OSTI ID:
- 6362119
- Journal Information:
- Nucl. Technol.; (United States), Vol. 63:3
- Country of Publication:
- United States
- Language:
- English
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Sandia HLW canister/overpack studies applicable for a salt repository
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Related Subjects
36 MATERIALS SCIENCE
CONTAINERS
MATERIALS TESTING
HIGH-LEVEL RADIOACTIVE WASTES
RADIOACTIVE WASTE DISPOSAL
TITANIUM ALLOYS
CORROSION
CORROSION PROTECTION
CRACK PROPAGATION
CRACKS
HYDROGEN EMBRITTLEMENT
IMPURITIES
NICKEL
PARAMETRIC ANALYSIS
PASSIVATION
SALT DEPOSITS
SANDIA LABORATORIES
STRAIN RATE
TENSILE PROPERTIES
TITANIUM OXIDES
WASTE FORMS
ALLOYS
CHALCOGENIDES
CHEMICAL REACTIONS
ELEMENTS
EMBRITTLEMENT
GEOLOGIC DEPOSITS
MANAGEMENT
MATERIALS
MECHANICAL PROPERTIES
METALS
NATIONAL ORGANIZATIONS
OXIDES
OXYGEN COMPOUNDS
RADIOACTIVE MATERIALS
RADIOACTIVE WASTES
TESTING
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
US AEC
US DOE
US ERDA
US ORGANIZATIONS
WASTE DISPOSAL
WASTE MANAGEMENT
WASTES
052002* - Nuclear Fuels- Waste Disposal & Storage
360105 - Metals & Alloys- Corrosion & Erosion