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Power Plant Sisak / IP ROTOR-STAGE 13th / LIFE ASSESMENT OF DISC BLADE GROOVE

Steam turbine K-210, manufactured by LMZ is installed in Sisak Power Plant, Croatia. The turbine is in operating condition from 1976 year, and in the mean time made 127898 operating hours, 189 cold start ups and 73 trips. Steam turbine has been overhauling and the turbine shaft was tested by NDT. During this NDT testing, damages as several cracks at blade groove of 13th stage, have been founding. Cracks are depths to 2.5 mm and length from 5 to 130 mm, along the 13th blade groove. The aim of this analysis is strength verification, crack propagation and life assessments of the 13th disc.

Life assesment; blade crack; crack propagation; strength verification; dics blade groove

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