Abstract
In the early morning hours on March 31, 1993, a major accident took place in a nuclear power plant located at Narora in Northern India. Blade # 52 of the last stage has shown a clear fatigue fracture at the first landing of its root The fracture surface clearly indicated three zones, the first zone with a crack initiating at the strain raiser point and propagating over a period of time, a second zone where the blade was subjected to a multiple impact type of loading and fresh crack initiation and propagation and the third zone consisting of unstable fracture. This paper describes the analysis of these cracks based on Stress Intensity Factor approach.
Volume Subject Area:
Rotor Dynamics
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Copyright © 1995 by The American Society of Mechanical Engineers
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