Circumferential arrays used for UT endoscopy on heat exchanger tubes

Book · Fri Dec 30 23:00:00 EST 1994

OSTI ID:72604

Liebig, V; Koehler, B ^[1]; Gebhardt, W; Kroening, M ^[2]; Mummert, K ^[3]

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1. Fraunhofer-Einrichtung fuer Akustische Diagnose und Qualitaetssicherung des IzfP, Dresden (Germany)
2. Fraunhofer-Inst. fuer zerstoerungsfreie Pruefverfahren, Saarbruecken (Germany)
3. Fraunhofer-Einrichtung fuer Festkoerperphysik und Schichttechnologie, Dresden (Germany)

Corrosion damage on steam generator (SG) heat exchanger tubes of nuclear power plants has repeatedly been the cause of limitations in availability and steam generator replacements. The objective here is to develop an ultrasonic testing (UT) method which enables damage phenomena on SG heat exchanger tubes to be determined and assessed. The method is based on the use of miniaturized ultrasonic array probes of piezoelectric composite materials whose characteristic impedance can be well matched to the load medium (water) and therefore guarantees a high signal efficiency with a good time resolution.

• OSTI ID: 72604
• Report Number(s): CONF-931061--; ISBN 0-87170-506-0
• Country of Publication: United States
• Language: English

Related Subjects

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
CRACK PROPAGATION
EXPERIMENTAL DATA
NUCLEAR POWER PLANTS
STEAM GENERATORS
STRESS CORROSION
TUBES
ULTRASONIC TESTING
WWER TYPE REACTORS