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Vol.12, No3, 2012, pp.191–196
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APPLICABILITY OF RISK-BASED MAINTENANCE STRATEGY TO A PENSTOCK Tamara Sedmak1, Ramo Bakić2, Stojan Sedmak3, Ljubica Milović3, Snežana Kirin2 1)University of Belgrade, Faculty of Mechanical Engineering, Belgrade, Serbia, tamarasedmak87@hotmail.com 2)Tehnička škola, Tutin. Serbia, ramo.bakic@gmail.com 3)University of Belgrade, Faculty of Technology and Metallurgy, Belgrade, Serbia 4)University of Belgrade, Faculty of Mechanical Engineering, Innovation Centree, Belgrade, Serbia |
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Abstract The risk of brittle fracture of the penstock of the reversible pump turbine is recognized in an early stage of design. To reduce the cost of penstock construction one tunnel is accepted. The HSLA steel of 700 MPa yield stress, 47 mm thick, is selected for the most stressed penstock section. It was necessary to assure structural integrity of welded joints and the penstock structure by involving an appropriate maintenance and repair approach. Maintenance procedures are in continuous development, and the most promising probably is the risk-based approach, developed recently. Basic requirements of this approach are considered in the paper, and the possibility and convenience to apply them for the penstock is evaluated. Keywords: brittle fracture, welded joint, penstock, prototype model, risk based maintenance |
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full article (284 kB)
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