Evaluating ultrasonic test indications in a combustion turbine wheel

Journal Article · Mon Jul 01 00:00:00 EDT 1985 · Power; (United States)

OSTI ID:6253978

Perry, C; Hartsell, E

In March 1983, Savannah Electric and Power Company's three-year-old combustion turbine was dismantled for inspection and maintenance. At that time, the unit had 2034 fired starts and 9693 fired hours on it. The rotating assembly was shipped to the manufacturer's service shop for the inspection and maintenance work. During the course of the inspection, the first and second stage wheels were straight-beam ultrasonic tested with no indications found. Subsequently, the wheels were intensively angle-beam ultrasonic tested and two indications were detected in the first stage wheel. The manufacturer recommended retiring the wheel from service. The power company suggested that since the same testing had been done on the wheel before purchase, the same imperfections may have existed then. This article discusses this disagreement and how it eventually led to premature scrapping of the wheel.

• Research Organization: Savannah Electric and Power Co.
• OSTI ID: 6253978
• Journal Information: Power; (United States), Vol. 89:7
• Country of Publication: United States
• Language: English

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