Towards Dynamic Safety Control Structures in STAMP to Manage Safety-Critical Industrial Establishments

Towards Dynamic Safety Control Structures in STAMP to Manage Safety-Critical Industrial Establishments RESET: Resilience Engineering for Safe Energy Transition Francesco Simone, Antonio Javier Nakhal Akel, Elena Stefana, Giulio di Gravio, and Riccardo Patriarca Department of Mechanical and Aerospace Engineering, Sapienza University of Rome (Italy) 1 ESREL SRA-E 2025 Stavanger, Norway 15 – 19 June 2025 Research funding RESET: Resilience Engineering for Safe Energy Transition 2 This research is funded by the project “RE-SET: Resilience Engineering for Safe Energy Transition” under the INAIL BRIC 2022 funding scheme RESET: Resilience Engineering for Safe Energy Transition 3 Number of industrial accidents over time [1] Decade 0 50 100 150 200 250 300 350 400 1970 - 1979 1980 - 1989* 1990 - 1999 2000 - 2009 2010 - 2019 Number of major accidents [1] European Union Join Research Center (JRC), eMARS database, https://emars.jrc.ec.europa.eu/en/emars/content RESET: Resilience Engineering for Safe Energy Transition 4 Number of industrial accidents over time [1] Decade 0 50 100 150 200 250 300 350 400 1970 - 1979 1980 - 1989* 1990 - 1999 2000 - 2009 2010 - 2019 Number of major accidents [1] European Union Join Research Center (JRC), eMARS database, https://emars.jrc.ec.europa.eu/en/emars/content 1982 RESET: Resilience Engineering for Safe Energy Transition 5 The RESET project The RESET project assists establishments in Seveso sector towards energy transition, prioritizing interventions and identifying actions for improvement. Project’s objectives: •Modelling the socio-technical system through STAMP •Conducting experimental and predictive analyses to assess energy transition effects •Developing a knowledge-based decision support tool for energy transition RESET: Resilience Engineering for Safe Energy Transition 6 System Theoretic Accident Model and Processes (STAMP) •Combines systems theory and control theory to have a new perspective on systems’ safety •Systems perspective incorporates effects on and mutual dependencies amongst system elements •Control theory views systems as collections of interrelated components to be kept in dynamic equilibrium by feedback loops and controls RESET: Resilience Engineering for Safe Energy Transition 7 Safety control structures SCSs are hierarchical models made by : •Controlled process •Controller •Control action •Feedback •Input and output •External disturbance (may be) Controller Controlled process Control algorithm(C) Process model (PM) FeedbackControl action Input Output RESET: Resilience Engineering for Safe Energy Transition 8 •Controlled process x45 •Controller x34 •Control action x146 •Feedback x81 •… RESET: Resilience Engineering for Safe Energy Transition 9 Is the whole structure always the most representative of the whole system? RESET: Resilience Engineering for Safe Energy Transition 16 Concluding remarks •Incorporating known rules and contextual information adds value by addressing the complexity of STSs, especially in regulated environments like those governed by the Seveso III Directive •Introducing causal and temporal relationships (either as simple metadata or through visual tools) adds a dynamic layer that better reflects real-world system behavior over time •Further formalization and comprehensive case studies are necessary to generalize the approach demonstrating its effectiveness in embedding dynamicity directly into the STAMP RESET: Resilience Engineering for Safe Energy Transition 17 Thank you! Towards Dynamic Safety Control Structures in STAMP to Manage Safety-Critical Industrial Establishments RESET: Resilience Engineering for Safe Energy Transition Francesco Simone [email protected] Department of Mechanical and Aerospace Engineering, Sapienza University of Rome (Italy) 18 ESREL SRA-E 2025 Stavanger, Norway 15 – 19 June 2025