Scholarly record

INTEGRATED ATEX-BASED RISK ASSESSMENT FOR HYDROGEN STORAGE AND UTILIZATION: METHODOLOGY, RISK MATRIX, AND CASE STUDY

Marcel-Daniel Rad, Mihai Magyari, Lucian Moldovan, Dragos Fotau, Diana Salasan

Abstract

Hydrogen is a promising energy carrier for future low-carbon systems, but its high flammability, wide explosion range, and low ignition energy present significant safety challenges. This paper proposes an integrated ATEX-based risk assessment methodology specifically designed for hydrogen storage and utilization systems. The methodology combines regulatory requirements, including EN 1127-1:2019, with a hydrogen-specific risk matrix, ATEX zone classification, and operational risk mitigation measures. A high-pressure hydrogen storage system is analyzed in a detailed case study, illustrating hazard identification, risk evaluation, and mitigation strategies. Results demonstrate that continuous leaks and inadequate ventilation can generate high or critical risk levels, emphasizing the importance of early detection, ventilation control, and ATEX-compliant equipment selection. The proposed approach provides a practical, structured framework to support engineering decision-making and enhance safety in industrial hydrogen applications.

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