Vol.16, No.3, 2016, pp.149–153
 UDC 620.179:621.224.35-112.81

DETERMINATION OF DAMAGE AND REPAIR METHODOLOGY FOR THE RUNNER MANHOLE OF KAPLAN TURBINE AT THE HYDRO POWER PLANT ‘DJERDAP 1’

Miodrag Arsić1, Srđan Bošnjak2, Simon Sedmak3, Živče Šarkoćević4, Zoran Savić1, Dorin Radu5

1)Materials Testing Institute, Belgrade, Serbia, miodrag.arsic@institutims.rs

2)University of Belgrade, Faculty of Mech. Engineering, Belgrade, Serbia

3)University of Belgrade, Innovation Centre of the Faculty of Mech. Engng., Belgrade, Serbia

4)High Technical School of Professional Studies, Zvečan, Serbia

5)University of Brasov, Faculty of Civil Engng., Romania

Abstract

Results of non-destructive testing of the Kaplan turbine runner manhole welded structure are presented, on the basis of which the repair methodology is defined. During repair, the welding technology for elements of the manhole is modified along with the proposal given for the modification of its structural design, because the finite element method calculation proved that the rectangular welded structure of the manhole was significantly better than round welded structure when it comes to integrity and service life.

Keywords: hydro turbine, manhole, damage, repair methodology

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