Nondestructive evaluation instrument surveillance test on 26-inch pipe. Final report. [BWR]

Technical Report · Sun Jan 01 04:00:00 EST 1984

OSTI ID:5245253

Bickford, R L; Clark, R A; Crawford, S L; Dawson, J F; Doctor, S R; Swift, P H

The 26-inch diameter pipe test stand simulates an operating reactor environment and was fabricated for evaluating in-service inspection techniques for large diameter pipes. The test stand consists of a 26-inch diameter 304 stainless steel pipe specimen welded into a loading frame with a removable water displacement plug at one end. The pipe specimen has stress corrosion cracking (SCC) promoted in the test weld region by means of water chemistry control and the use of graphite wool technique to create an artificial crevice. After initiation of SCC, crack growth was observed and monitored by nondestructive examination both during operation and at several intervals during test stand shutdown. Nondestructive examination techniques evaluated include dye penetrant, ultrasonic, radiography, electrical resistivity gauging and acoustic emission. Continuous ultrasonic measurement of flaw growth was demonstrated during long-term cyclic service simulating plant operation.

• Research Organization: Battelle Pacific Northwest Labs., Richland, WA (USA)
• OSTI ID: 5245253
• Report Number(s): EPRI-NP-3393; ON: DE84920305
• Country of Publication: United States
• Language: English

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