Detailed analysis of the fundamental ultrasonic response data from stainless steel stress corrosion crack specimens. [BWR; PWR]

Technical Report · Wed Feb 01 00:00:00 EST 1978

DOI:https://doi.org/10.2172/5099609· OSTI ID:5099609

McElroy, J. T.

After the Boiling Water Reactor (BWR) stress corrosion cracking incidents on 4- and 10-inch stainless steel piping, the Electric Power Research Institute (EPRI) organized a round-robin ultrasonic examination of piping removed from service. Five teams including Southwest Research Institute (SwRI) participated in this program, using both a standard procedure and the individual team procedure. The original intent was to section the piping after the program to evaluate the effectiveness of state-of-the-art ultrasonics to find stress corrosion cracking. This sectioning was delayed to allow SwRI engineers and other development groups time to perform basic measurements aimed at determining optimum search unit and instrument characteristics for the ultrasonic examination of stainless steel piping. During the study, the SwRI team collected approximately 400 data points. These data consist of oscilloscope recordings of the RF (radio frequency) waveform and a linear spectrum analysis of the signal reflected from the crack specimens. The report summarizes the ultrasonic response data compiled during the course of the study. The results of this study have indicated direction for remedial action.

• Research Organization: Southwest Research Inst., San Antonio, Tex. (USA). Quality Assurance Systems and Engineering Div.
• OSTI ID: 5099609
• Report Number(s): EPRI-NP-676-SR; TRN: 78-009586
• Country of Publication: United States
• Language: English

Related Subjects

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REACTOR COOLING SYSTEMS
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ULTRASONIC TESTING
PWR TYPE REACTORS
STAINLESS STEELS
CRACKS
IN-SERVICE INSPECTION
ACOUSTIC TESTING
ALLOYS
CHEMICAL REACTIONS
CHROMIUM ALLOYS
COOLING SYSTEMS
CORROSION
CORROSION RESISTANT ALLOYS
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IRON ALLOYS
IRON BASE ALLOYS
MATERIALS TESTING
NONDESTRUCTIVE TESTING
REACTOR COMPONENTS
REACTORS
STEELS
TESTING
WATER COOLED REACTORS
WATER MODERATED REACTORS
210100* - Power Reactors
Nonbreeding
Light-Water Moderated
Boiling Water Cooled
210200 - Power Reactors
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360105 - Metals & Alloys- Corrosion & Erosion