NDE of stainless steel and on-line leak monitoring of LWRs
The GARD/ANL acoustic leak detection system is under evaluation in the laboratory. Results of laboratory tests with simulated acoustic leak signals and acoustic signals from field-induced intergranular stress corrosion cracks (IGSCCs) indicate that cross-correlation techniques can be used to locate the position of a leak. Leaks from a 2-in. ball valve and a flange were studied and compared with leaks from IGSCCs and fatigue cracks. The dependence of acoustic signal on flow rate and frequency for the valve and the flange was comparable to that of fatigue cracks (thermal and mechanical) and different from that of IGSCCs. Two pipe-to-endcap weldments with overlays were examined. Because the amount of cracking in the specimens was limited, the emphasis was on trying understand the nature of crack overcalling. Four 60-mm-thick cast stainless steel plates with microstructures ranging from equiaxed to primarily columnar grains have been examined with ultrasonic waves. 13 refs., 23 figs.
- Research Organization:
- Argonne National Lab., IL (USA); GARD, Inc., Niles, IL (USA)
- DOE Contract Number:
- W-31-109-ENG-38
- OSTI ID:
- 6310544
- Report Number(s):
- CONF-8510173-39; ON: TI86004052
- Resource Relation:
- Conference: 13. water reactor safety research information meeting, Gaithersburg, MD, USA, 22 Oct 1985
- Country of Publication:
- United States
- Language:
- English
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36 MATERIALS SCIENCE
ACOUSTIC EMISSION TESTING
BWR TYPE REACTORS
REACTOR COMPONENTS
REACTOR MATERIALS
PWR TYPE REACTORS
THERMAL FATIGUE
CRACKS
FLANGES
FLOW RATE
LEAK DETECTORS
LEAKS
MECHANICAL PROPERTIES
PIPES
STAINLESS STEELS
TESTING
VALVES
ACOUSTIC TESTING
ALLOYS
CHROMIUM ALLOYS
CONTROL EQUIPMENT
CORROSION RESISTANT ALLOYS
EQUIPMENT
FATIGUE
FLOW REGULATORS
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS
MATERIALS TESTING
NONDESTRUCTIVE TESTING
REACTORS
STEELS
WATER COOLED REACTORS
WATER MODERATED REACTORS
210100* - Power Reactors
Nonbreeding
Light-Water Moderated
Boiling Water Cooled
210200 - Power Reactors
Nonbreeding
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Nonboiling Water Cooled
360103 - Metals & Alloys- Mechanical Properties