Characterization of single-tube model-boiler dented intersection specimens. Final report. [PWR]
Crevice denting, caused by the uncontrolled growth of magnetite in the space between carbon-steel tube-support plates and Inconel heat-exchange tubes is a major cause of concern in nuclear steam generators. This particular form of localized corrosion has been modeled experimentally by the Westinghouse Electric Corporation using prototypical boiler systems. In this study, three corrosion specimens from these model-boiler systems have been characterized by Calgon Corporation using light and scanning electron microscopy along with both energy- and wave-length-dispersive x-ray spectrophotometry. Samples examined consisted of specimens which had been exposed to a known corrosive environment and then either left untreated, treated with calcium hydroxide, or treated with boric acid in an attempt to halt the corrosion process. The destructive examination of the samples was conducted on both polished sections as well as sections fractured in liquid nitrogen to expose uncontaminated interfaces between the multiple phases involved.
- Research Organization:
- Calgon Corp., Pittsburgh, PA (USA)
- OSTI ID:
- 6365619
- Report Number(s):
- EPRI-NP-3024; ON: DE83902194
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
INCONEL 600
CORROSION DENTING
PWR TYPE REACTORS
REACTOR MATERIALS
STEAM GENERATORS
STEEL-ASTM-A285
STEEL-ASTM-A508
CHEMICAL REACTIONS
MICROSTRUCTURE
SUPPORTS
TUBES
WATER CHEMISTRY
ALLOYS
BOILERS
CHEMISTRY
CHROMIUM ALLOYS
CRYSTAL STRUCTURE
DEFORMATION
INCONEL ALLOYS
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS
MECHANICAL STRUCTURES
NICKEL ALLOYS
NICKEL BASE ALLOYS
NIOBIUM ALLOYS
REACTORS
STEELS
VAPOR GENERATORS
WATER COOLED REACTORS
WATER MODERATED REACTORS
210200* - Power Reactors
Nonbreeding
Light-Water Moderated
Nonboiling Water Cooled
360105 - Metals & Alloys- Corrosion & Erosion