Interim assessment of N-Reactor Zircaloy-2 pressure tube corrosion and hydriding
Nine N-Reactor Zircaloy-2 tubes have been removed from service for examination. The analysis of corrosion and hydriding results for seven tubes with exposures ranging from 356 to 3203 effective full power days is presented in this report. Those N-Reactor operating characteristics that are important to tube corrosion and hydriding analysis, in particular, temperature, neutron flux, and water chemistry data, are also presented. The tube corrosion and hydriding results are referenced to data from studies of N-Reactor tube specimens that were exposed in the Engineering Test Reactor (ETR) G-7 loop. The oxides also are relatively thin on tube OD surfaces (<10 ..mu..m), even at high-flux locations. However, thick oxide layers form on tube ID surfaces that are in contact with the reactor coolant, generally following the flux profile. The flux-enhanced corrosion was modeled, accounting for thermal and radiation effects.
- Research Organization:
- Pacific Northwest Lab., Richland, WA (USA); UNC Nuclear Industries, Inc., Richland, WA (USA)
- DOE Contract Number:
- AC06-76RL01857
- OSTI ID:
- 6237083
- Report Number(s):
- UNI-3107; PNL-5311; ON: DE87008415
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
22 GENERAL STUDIES OF NUCLEAR REACTORS
220200 -- Nuclear Reactor Technology-- Components & Accessories
220600* -- Nuclear Reactor Technology-- Research
Test & Experimental Reactors
ALLOYS
BWR TYPE REACTORS
CHEMICAL REACTIONS
CHEMISTRY
CHROMIUM ADDITIONS
CHROMIUM ALLOYS
COOLING SYSTEMS
CORROSION
DATA
ELEMENTS
ENERGY SYSTEMS
ENRICHED URANIUM REACTORS
EXPERIMENTAL DATA
GRAPHITE MODERATED REACTORS
HYDRIDATION
HYDROGEN
INFORMATION
IRON ADDITIONS
IRON ALLOYS
LWGR TYPE REACTORS
MATHEMATICAL MODELS
N-REACTOR
NEUTRON FLUX
NONMETALS
NUMERICAL DATA
OXIDATION
PLUTONIUM PRODUCTION REACTORS
POST-IRRADIATION EXAMINATION
POWER REACTORS
PRESSURE TUBES
PRODUCTION REACTORS
PWR TYPE REACTORS
RADIATION FLUX
REACTOR COMPONENTS
REACTOR COOLING SYSTEMS
REACTORS
TEMPERATURE EFFECTS
TIN ALLOYS
TUBES
WATER CHEMISTRY
WATER COOLED REACTORS
WATER MODERATED REACTORS
ZIRCALOY
ZIRCALOY 2
ZIRCONIUM ALLOYS
ZIRCONIUM BASE ALLOYS