210531_PRESLHY_D6.3_RCS recommendations_Final

210531_PRESLHY_D6.3_RCS recommendations_Final

Outcomes from PRESLHY project were extracted and translated into suitable information and
tools for international SDOs, regulatory bodies and industry, so that they can be implemented
into performance-based Regulations, Codes and Standards (RCS).
Thus, this document summarizes and prioritizes the findings of WP3 to WP5 to identify RCS
recommendations concerning the safe use of liquid hydrogen and to propose a roadmap for
bringing these recommendations to international bodies. The report represents the consensus of
the PRESLHY group regarding RCS recommendations.
Fourteen recommendations were formulated in order to be addressed to RCS organizations.
They are relating to:
 Phenomena, concrete consequences and potential associated mitigation ways, for the
following topics:
o Release, flowrate, dispersion in free field
o Ignition, flame propagation and explosion
o Burst of the storage vessel
 Calculation means to evaluate consequences through:
o Analytical models,
o Engineering correlations,
o Numerical modelling.
The PRESLHY consortium members are aware that this “simple” document will not allow the
integration of the described recommendations. It is necessary to actively participate in technical
committees and other working groups.
Thus, dissemination of these recommendations is already launched since numerous of
PRESLHY project partners are already involved in mentioned RCS organizations, working
groups and technical committees (e.g. ISO/TR/15916, a specific task force in on-going revision
has been set up to draft a specific chapter on liquid hydrogen to be integrated for the update of
the existing document).

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