Effect of decontamination on aging processes and considerations for life extension
The basis for a recently initiated program on the chemical decontamination of nuclear reactor components and the possible impact of decontamination on extended-life service is described. The incentives for extending plant life beyond the present 40-year limit are discussed, and the possible aging degradation processes that may be accentuated in extended-life service are described. Chemical decontamination processes for nuclear plant primary systems are summarized with respect to their corrosive effects on structural alloys, particularly those in the aged condition. Available experience with chemical cleaning processes for the secondary side of PWR steam generators is also briefly considered. Overall, no severe materials corrosion problems have been found that would preclude the use of these chemical processes, but concerns have been raised in several areas, particularly with respect to corrosion-related problems that may develop during extended service.
- Research Organization:
- Argonne National Lab., IL (USA)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 5379240
- Report Number(s):
- CONF-8710111-32; ON: DE88005956
- Resource Relation:
- Conference: 15. water reactor safety information meeting, Gaithersburg, MD, USA, 26 Oct 1987
- Country of Publication:
- United States
- Language:
- English
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36 MATERIALS SCIENCE
BWR TYPE REACTORS
PRIMARY COOLANT CIRCUITS
REACTOR COMPONENTS
DECONTAMINATION
PWR TYPE REACTORS
STEAM GENERATORS
AGING
ALLOYS
AUSTENITIC STEELS
CARBON STEELS
CHEMICAL PROPERTIES
CHEMICAL REACTIONS
CLEANING
CONTROL ELEMENTS
EMBRITTLEMENT
FUEL CANS
INTERGRANULAR CORROSION
PIPES
PUMPS
RADIATION EFFECTS
REAGENTS
SERVICE LIFE
SOLVENTS
STAINLESS STEELS
TUBES
VALVES
BOILERS
CHROMIUM ALLOYS
CONTROL EQUIPMENT
COOLING SYSTEMS
CORROSION
CORROSION RESISTANT ALLOYS
ENERGY SYSTEMS
EQUIPMENT
FLOW REGULATORS
IRON ALLOYS
IRON BASE ALLOYS
REACTOR COOLING SYSTEMS
REACTORS
STEELS
VAPOR GENERATORS
WATER COOLED REACTORS
WATER MODERATED REACTORS
210100* - Power Reactors
Nonbreeding
Light-Water Moderated
Boiling Water Cooled
210200 - Power Reactors
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Light-Water Moderated
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360105 - Metals & Alloys- Corrosion & Erosion
360106 - Metals & Alloys- Radiation Effects