PSI - Issue 48

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2023) 000 – 000

www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 48 (2023) 266–273

© 2023 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the IRAS 2023 organizers Abstract Water engineering professionals mostly agree that preventing accidents in complex hydraulic engineering systems must be an integral part of the system management and decision support process. The traditional approach, which usually ends up with finding a component failure and/or human error as a root cause of accidents, resulted in other causes left out (flaws during planning and design, organization and management flaws, etc.). Considering that hydraulic engineering systems are organized and very complex systems, it is recommended to shift focus from preventing (only) component failures towards building system safety. Recent events related to the operations of Hydro-Power Plant (HPP) Pirot (Serbia) will be used to illustrate the approach. Paper deals with the application of the STAMP (System-Theoretic Accident Model and Processes) and STPA (System-Theoretic Process Analysis) (Leveson, 2004). Although based on the limited access to information, there were some interesting findings on the flaws in HPP Pirot operations: Annual production plan reached already in April (2018); Compensation basins not used by HPP; Unusually low levels in Zavojsko Lake were within design limits; HPP Pirot operates as designed, there are no component failures - but unsafe. Safety constraints have to be re-examined after complaints and fatalities. Design parameters, relevant to the design phase, have to be updated on the basis of as-built/present conditions. © 2023 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the IRAS 2023 organizers Keywords: hydraulic engineering; system; hazards; safety; Second International Symposium on Risk Analysis and Safety of Complex Structures and Components (IRAS 2023) From Component Failure to Hydraulic Engineering Complex System Safety Aleksandar Šotić a, * , Marko Ivetić b a ATUSSB School of Civil Engineering and Geodesy Belgrade, Hajduk Stankova 2, 11050 Belgrade, Serbia b UNESCO Chair in Water, University of Belgrade, Faculty of Civil Engineering, Bulevar kralјa Aleksandra 73, 11000 Beograd , Srbija

* Corresponding author. Tel.: +381-63-243-077. E-mail address: sotic.vggs@gmail.com

2452-3216 © 2023 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the IRAS 2023 organizers

2452-3216 © 2023 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the IRAS 2023 organizers 10.1016/j.prostr.2023.07.133