Identification, Évaluation et Amélioration des Éléments Importants pour la Sécurité (EIPS) dans les Installations Classées Hydrocarbures Application au Four Rebouilleur du Module MPP0 — SONATRACH Hassi R'Mel

Abstract

This thesis focuses on the application of the Safety Important Elements (SIE/EIPS) methodology to classified hydrocarbon installations, using the H401 reboiler furnace at the MPP0 production module of the Hassi R'Mel gas complex (SONATRACH, Algeria) as a case study. The research is structured in three chapters. The first chapter establishes the conceptual, regulatory and methodological foundations of the EIPS approach, drawing on the Algerian regulatory framework (Law No. 03-10 of July 19, 2003, Executive Decrees No. 06- 198 and 21-331) and international normative references (IEC 61511:2016, IEC 61508:2010, OLF 070 guideline, SEVESO III Directive). It defines four EIPS classification typologies by safety function, physical nature, hazard controlled and SIL level and formalizes a fivephase identification and management methodology. The second chapter applies this methodology to the H401 furnace: characterization of six major risk categories, structural decomposition into four sub-systems (feed, control, alarm, SIS/ESD emergency shutdown), identification and classification of seven EIPS, and qualitative assessment of the ESD system Safety Integrity Level (SIL) using Fault Tree Analysis (FTA) with the GRIF software. Results reveal that the 1oo1 non-dedicated architecture of SIS sensors is the limiting factor preventing attainment of the target SIL 2 level. The third chapter formalizes seven rated reservations (two Critical, three Major, two Minor) and develops an 18-month structured corrective action plan (CAP), incorporating alternative EIPS, designated responsible parties and deadlines. Post-CAP re-evaluation projects the H401 ESD system toward the global SIL 2 target level, pending quantitative validation and third-party independent certification.