Nondestructive evaluation methods to measure inside diameters of steam generator tubing: Topical report

Technical Report · Fri Jul 01 04:00:00 EDT 1988

OSTI ID:6969017

Brown, S; Krzywosz, K; Cox, J; Elmo, P M

Numerous steam generators have experienced tube deformation or denting at support plate intersections due to localized mechanical forces exerted by a magnetite corrosion product within tube and carbon steel support plate annulus. In extreme cases, this denting has led to the early replacement of some steam generators, i.e., Surry and Turkey Point. In addition to monitoring the steam generator for tube wall degradation it has become apparent that it is also desirable to monitor the condition of dented tube-support plate intersections during scheduled inservice inspections. To this end, the acquisition of accurate and reliable information with regards to dent shape is important in establishing tube strain and identifying dent growth rates. This report summarizes the results of a round-robin evaluation conducted in 1983 using then available state-of-the-art technology for assessing dented tubes. More specifically, the capability of various systems for profiling and providing estimates of tube inner diameter on known dent shapes was demonstrated.

• Research Organization: Electric Power Research Inst., Palo Alto, CA (USA); Jones (J.A.) Applied Research Co., Charlotte, NC (USA)
• OSTI ID: 6969017
• Report Number(s): EPRI-NP-5902; ON: TI88014500
• Country of Publication: United States
• Language: English

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