cenelec:proj:73438

Safe use of hydrogen in built constructions

Scope

Scope of the proposed deliverable
'This document describes measures for a safe use of hydrogen in built constructions and gives the technical rationales and
operational guidance for aspects listed below:
Built constructions means buildings and/or other structure, for example houses, parking houses, tunnels, enclosed structures, steel
containers.
Aspects:
- Prevention of occurrence, considering
o Hydrogen properties
o Safe design approach, including:
Ventilation, both natural/forced ventilation, combined with gas dispersion patterns and cloud sizes
Detection, location and density of detectors, type, intensity of detection (devices), both smoke and gas detection;
Leakage aspects;
Mapping of different materials and construction designs of the enclosure;
o Operational aspects:
Normal service mode vs. failure mode ;
Adequate training of mechanics, inspectors, contractors, etc.
- Limiting the effect of consequences
o Fires
Fire protection (risk analyses and appropriate measures)
Influence of issues in the area of other energy types available, flammability of materials etc
Fire at connecting buildings and spaces;
Jet fire risk analyses and resulting safe designs (including leak, fire characteristics, design and protection needs)
o Explosions
Explosion risk analyses and resulting safe designs (including explosion phenomenon in a probabilistic framework)
Influence of capacity for hydrogen (volume, pressure, conditions) in the confined space;
Pressure peaking phenomena.
- Emergency response in case of incidents (e.g. leakage, overpressure, fire, explosion)
o Knowledge transfer
o Firefighting emergency preparedness, etc;
o Practices and drills
The document will also include a list of relevant standards to benefit from existing requirements and facilitate the expected future
change to these standards.