Exploring Underground Hydrogen Storage: The potential of utilizing geological cavities and formations for storing hydrogen and the feasibility of repurposing existing natural gas storage facilities to accommodate hydrogen storage needs.

Metrological and Thermodynamic Challenges: Highlighting the critical importance of safety and reliability in large-scale hydrogen storage and challenges related to accurate measurements and thermodynamic considerations. 

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WP4 – Metrology for Reversible H2 Storage Technologies