Issue 53

S. Kirin et alii, Frattura ed Integrità Strutturale, 53 (2020) 345-352; DOI: 10.3221/IGF-ESIS.53.27 345 Risk based analysis of RHPP penstock structural integrity Snežana Kirin, Lazar Jeremi ć Innovation Center of the Faculty of Mechanical Engineering, Belgrade, Kraljice Marije 16, Serbia snezanakirin@yahoo.com, laki991@hotmail.com Aleksandar Sedmak University of Belgrade, Faculty of Mechanical Engineering, Kraljice Marije 16, 11020 Belgrade 35, Serbia asedmak@mas.bg.ac.rs Igor Marti ć , Simon Sedmak, Ivana Vu č eti ć Innovation Center of the Faculty of Mechanical Engineering, Belgrade, Kraljice Marije 16, Serbia simonsedmak@yahoo.com Tamara Golubovi ć Innovation Center of the Faculty of Technology and Metallurgy, Belgrade, Karnegijeva 4, Serbia simonsedmak@hotmail.com A BSTRACT . Risk based analysis of reverse hydro power plant penstock structural integrity is performed using fracture mechanics parameters. To assess its structural integrity, extensive testing of the full-scale prototype had been performed, including hydrostatic over-pressurizing, during the design phase. More recently, the Failure Assessment Diagram has been used to evaluate probability, whereas phenomenological analysis has been used to estimate consequence, in the scope of common risk estimation. It is shown that over-pressuring has potential detrimental effect on pipeline safety, i.e. structural integrity. K EYWORDS . Over-pressure; Pipeline; Structural integrity; Risk matrix. Citation: Kirin, S., Jeremi ć , L., Sedmak, A., Marti ć , I., Sedmak, S., Vu č eti ć , I., Golubovi ć , T., Risk based analysis of RHPP penstock structural integrity, Frattura ed Integrità Strutturale, 53 (2020) 345-352. Received: 12.05.2020 Accepted: 31.05.2020 Published: 01.07.2020 Copyright: © 2020 This is an open access article under the terms of the CC-BY 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. I NTRODUCTION eversible Hydro Power Plant (RHPP) “Bajina Basta” is in operation since 1982, [1, 2]. Taking into account that the failure of its most critical part, the penstock, Fig. 1, would cause water overflow of the surge hub in the surrounding area, and the collapse of the entire plant, it is clear that special attention is still needed to prove its structural integrity. R